BATTERY COVER TO PREVENT ELECTROLYTE LEAKAGE

专利摘要:
battery cover to prevent electrolyte leakage. The present invention relates to a battery cover for preventing electrolyte leakage. in the battery cover, a sealed mounting structure of the top and bottom covers of a battery box is configured in such a way that it forms a labyrinthine structure that can allow an electrolyte to move up and down, increasing from that. mode, a resistance to electrolyte leakage from the battery box. in addition, gas discharge holes and micro-holes are formed in the battery cover, and thus the battery cover can easily discharge gas from the battery box. on the battery cover, electrolyte recovery ports are arranged in such a way that electrolyte can be prevented from leaking out of the battery box even when the battery box is turned or tilted to one side.
公开号:BR102013015352B1
申请号:R102013015352-4
申请日:2013-06-18
公开日:2021-07-20
发明作者:Hyun Ryung Kim；Seung Bok Park；Kyu Hyeong Lee
申请人:Global Battery Co., Ltd；
IPC主号:

专利说明:

BACKGROUND OF THE INVENTION Field of Invention
[001] The present invention relates, in general, to battery covers to prevent electrolyte leakage, and more particularly to a battery cover to prevent electrolyte leakage, in which a sealed mounting structure of upper covers and bottom of a battery box is configured in such a way that it forms a labyrinth structure that can allow an electrolyte to move up and down, thereby increasing a resistance to electrolyte leakage from the battery box, and in which gas discharge holes and micro-holes are formed so as to easily discharge gas from the battery box, and in which electrolyte recovery ports are arranged in such a way that electrolyte can be prevented from leaking from the battery box even when the battery box is turned or tilted to one side. Description of Related Art
[002] A battery is a device that can supply electricity by discharging charged electricity. A rechargeable battery that can be recycled by repeating the process of charging and discharging electricity a predetermined number of times is so called a secondary battery or a storage battery (hereinafter, simply called a battery).
[003] Batteries are classified into a variety of types in accordance with positive and negative plate materials and an electrolyte material, in which a battery that uses lead as the positive and negative plate material and that uses a sulfuric acid as the electrolyte is called a lead-acid battery.
[004] The lead-acid battery includes polar plates used as positive and negative plates, terminals, a separator that physically and electrically separate the two polar plates from each other, an electrolyte and a battery box that receives the elements in it. Furthermore, a gas discharge port is typically formed in the sealed battery box in order to discharge hydrogen gas generated from the charge and discharge processes and to discharge gas generated from electrolyte evaporation.
[005] An example of lead-acid batteries is a battery that is operated by repeating the discharge and charge processes through a reversible reaction represented by a chemical reaction formula: PbO2 + H2SO4 θ PbSO4 + 2H2O. The battery emits electricity through discharge and stores incoming electricity in it through charge.
[006] The lead-acid battery uses a chemical reaction in which the polar plates of lead dioxide (PbO2) and a sulfuric acid electrolyte (H2SO4) are changed into lead sulfate (PbSO4) and water (H2O). When lead dioxide and sulfuric acid are changed into lead sulfate (PbSO4) and water (H2O) in the lead-acid battery, electricity is generated and discharged. Conversely, when the lead-acid battery is charged, replacement is performed.
[007] Whenever the aforementioned chemical reaction is performed, heat is generated in the battery and causes the electrolyte to be partially vaporized and a small amount of hydrogen gas to be generated, therefore it is required to discharge the battery gas into the atmosphere in order to prevent the battery from exploding.
[008] Furthermore, a vehicle battery is directly affected by the bump vibration of a vehicle during a vehicle movement, therefore it is required that an electrolyte is prevented from leaking from the battery to the outside through the gas discharge port.
[009] Examples of conventional technologies that have been proposed to discharge gas from inside the battery to the outside can be referred to in KO Patent Application No. 10-2000-0072402 (filed December 1, 2000) entitled “STRUCTURE FOR DISCHARGING EVAPORATING GAS FROM VEHICLE BATTERY” and KO Patent Application No. 10-2008-0050115 (filed May 29, 2008) entitled “VENT PLUG FOR Ni-MH BATTERY”.
[0010] Figure 1 is a view illustrating the functional construction of the breather plug which is a prior art device proposed to prevent a battery electrolyte leakage and to discharge battery gas.
[0011] Hereinafter, the aforementioned device will be described in detail with reference to the attached drawing, Figure 1. As shown in the drawing, gas generated in the battery is discharged to the outside through a battery cover 110 that is entirely formed at one end top of a 200 battery box.
[0012] Here, the battery cover 110 has a cylindrical structure having a predetermined diameter and height. Battery box 200 forms cells and receives positive plates 210, negative plates 220, separators 230 and an electrolyte 240 in it.
[0013] The battery cover 110 is provided with electrolyte injection ports that communicate with respective chambers which are defined as spaces divided in the battery box 200 by a plurality of partition walls. A valve 130 is inserted into each electrolyte injection port, with a gasket 150 placed around the upper end of the electrolyte injection port so as to seal a gap between the electrolyte injection port and the valve 130.
[0014] In addition, the cylindrical battery cover 110 has threads on an inner circumferential surface thereof, and a plug that includes a breather cap 120 that has threads around an outer circumferential surface thereof is fastened to the battery cover. cylindrical 110, with a spring 140 placed in the breather cap so the plug can seal the electrolyte injection port.
[0015] A gas discharge port is formed through the upper end of the breather cap 120 so that gas can be discharged to the outside through the gas discharge port.
[0016] The aforementioned conventional technology provides a structure that can discharge gas from the battery to the outside in accordance with the elasticity of the spring 140 and is advantageous in that when gas is generated in the battery to a degree at which the pressure of the gas exceeds a predetermined level, the gas can be automatically discharged.
[0017] However, conventional technology is problematic in that the gas may not be discharged effectively due to the poor quality of spring 140. Another disadvantage of conventional technology is that it has a complex construction and many parts, which complicates the production process and increases the time required for production, thereby increasing the cost of production.
[0018] Also, when a conventional battery is turned or is tilted to one side, electrolyte may leak directly from the battery. In the above state, the leaking electrolyte may be partially collected in a space between the valve and the plug breather cap in the electrolyte injection port and may corrode the spring.
[0019] When the plug spring that is placed in the battery electrolyte injection port is corroded, the spring elasticity is reduced, so that the valve can be opened undesirably even under low gas pressure, and this can cause electrolyte to leak freely without resistance. Consequently, it is required to propose a technology that can effectively discharge gas from the battery while preventing electrolyte leakage without increasing the number of parts, thereby keeping the production cost at a desired level, and which can recover the Leaking electrolyte collecting the leaking electrolyte and feeding the collected electrolyte into the battery.
[0020] In addition, conventional technologies are designed so that most of the gas generated in the battery box can be discharged to the outside either through the electrolyte recovery ports or through the electrolyte injection port. In the above state, the gas pressure discharge that functions to discharge the gas to the outside can act on the electrolyte stored in the battery box, thereby causing, undesirably, a large amount of electrolyte to leak through the recovery ports or through the electrolyte injection port at the same time as the gas discharge. SUMMARY OF THE INVENTION
[0021] Consequently, the present invention was created keeping in mind the above problems that occur in the related art, and the present invention is intended to propose a battery cover to prevent electrolyte leakage, in which an upper cover mounting structure and lower is configured in such a way that it forms a labyrinth structure that can increase a resistance to movement of a leaking electrolyte and can recover the leaking electrolyte while preventing leakage of the electrolyte.
[0022] Another objective of the present invention is to propose a battery cover to prevent electrolyte leakage, in which lower recovery ports are arranged in such a way that the lower recovery ports can prevent electrolyte leakage even when the box The battery box is turned or tilted to one side, thereby preventing electrolyte from leaking even when the battery box is turned or tilted to one side at a rapid tilt angle.
[0023] A further objective of the present invention is to propose a battery cover to prevent electrolyte leakage, in which gas discharge ports are formed in order to discharge gas generated in the battery box, thereby preventing the gas is discharged through the recovery ports and preventing a generation of an electrolyte discharge pressure that can cause the electrolyte to leak so that the battery cover can prevent a leakage of the electrolyte.
[0024] In order to achieve the above objectives, the present invention provides the following modalities.
[0025] In the first embodiment of the present invention, a battery cover is provided to prevent electrolyte leakage, which includes a lower cover hermetically seated on an upper end of a battery box that stores an electrolyte therein, and an upper cover mounted on an upper end of the lower cover, wherein the upper cover includes: one or more upper cells arranged lengthwise on a lower surface of the upper cover, an upper inner wall that extends horizontally and vertically at spaced locations, and an upper labyrinth wall extending vertically into a space between the upper cells and the upper inner wall and connecting the upper cells to the upper inner wall; the bottom cover includes: one or more bottom cells arranged lengthwise on an upper surface of the bottom cover, a bottom wall that extends horizontally and vertically at spaced locations, and a bottom labyrinth wall that extends vertically in a space between the lower cells and the lower wall; and the upper labyrinth wall includes a pair of upper labyrinth walls that are separate from each other, and therefore, when the upper cover is mounted on the upper end of the lower cover, the lower labyrinth wall is placed between the pair of upper walls. upper labyrinth.
[0026] In the second embodiment of the present invention, the top cover includes: an outer wall that protrudes along an edge of the lower surface of the top cover and extends horizontally and vertically so that the outer wall forms an edge along the edge of the bottom surface of the top cover; gas discharge ports formed through the outer wall from upper outermost cells opposite the one or more upper cells so as to discharge gas which is discharged from the battery box; a guide wall slantingly extending in a vertical direction at a location between the outer wall and the upper inner wall; and one or more upper cell separation walls extending vertically from the upper inner wall so as to separate the one or more upper cells from one another.
[0027] In the third embodiment of the present invention, the upper inner wall includes: a first upper inner wall that extends along the upper ends of the one or more upper cells; second upper inner walls extending vertically from opposite ends of the first upper inner wall and having respective bent portions that are bent inwardly at opposite ends of the upper cover having the gas discharge ports; and a third upper inner wall extending horizontally between the ends of the second upper inner walls at a location opposite the first upper inner wall, thereby forming lower horizontal walls of the one or more upper cells.
[0028] In the fourth embodiment of the present invention, the lower cells include: lower recovery ports, each having one or more recovery holes in order to recover an electrolyte leaked into the battery box, where when the one or more more lower cells are arranged lengthwise, lower recovery ports are formed on respective lower cells at a predetermined location and are slanted towards a center of the lower cover.
[0029] In the fifth embodiment of the present invention, each of the lower recovery ports includes: the one or more recovery holes that are open at the upper ends thereof and formed through a lower surface of an associated lower cell so as to be communicate with the battery box; an outer recovery door wall which projects upward from the lower surface through which the recovery holes are formed; and one or more cutout holes formed by cutting the outer wall of the recovery port and allowing leaked electrolyte to flow therethrough.
[0030] In the sixth embodiment of the present invention, the lower cells include: gas discharge holes that communicate with the battery box that stores the electrolyte therein, thereby discharging the gas from the battery box.
[0031] In the seventh embodiment of the present invention, the lower cells additionally include: micro-holes that communicate with the battery box that stores the electrolyte therein, thereby discharging the gas from the battery box.
[0032] In the eighth embodiment of the present invention, the gas discharge holes are formed in the one or more lower cells arranged lengthwise at predetermined locations and are inclined in directions of the outermost lower cells opposite a center of the lower cover.
[0033] In the ninth embodiment of the present invention, micro-holes are formed in outermost cells opposite the one or more lower cells.
[0034] In the tenth embodiment of the present invention, the micro-holes are formed in the areas of the lower cells at predetermined locations and are inclined towards a center of the lower cover.
[0035] In the eleventh embodiment of the present invention, the upper cells additionally include: upper dampers that extend horizontally in areas of the upper cells, the upper dampers acting as dams to prevent a movement of the electrolyte.
[0036] In the twelfth embodiment of the present invention, the lower cells, in which the upper cells are placed, include: lower recovery ports that have one or more recovery holes for recovering electrolyte leaked into the battery box; lower injection ports formed through lower surfaces of lower cells to inject electrolyte into the battery box; horizontal lower walls extending horizontally such that the lower horizontal walls are separated from the lower wall; vertically extending bottom cell separation walls so as to separate neighboring bottom cells from each other; and lower guide walls extending from the outer walls of the lower injection ports to the lower horizontal walls after passing through the lower recovery ports such that the lower guide walls are separated from the lower cell separation walls so that the lower guide walls form electrolyte passages to guide leaked electrolyte from the lower recovery ports or lower injection ports to the lower labyrinthine wall.
[0037] In the thirteenth embodiment of the present invention, the lower cells include: first lower extension walls that extend from the outer walls of the lower recovery doors in directions oriented to the opposite outermost lower cells; second lower extension walls extending from the lower cell separation walls to form walls separate from the lower recovery ports, thereby defining electrolyte passageways to guide the poured electrolyte; and third lower extension walls extending horizontally from the outer walls of the lower injection ports at locations opposite the lower guide walls, thereby forming electrolyte passageways between distal ends thereof and lower cells near the distal ends.
[0038] In the fourteenth embodiment of the present invention, each of the lower cells is configured so that a height of a first lower surface that forms an electrolyte passageway between the lower guide wall and the lower cell separation wall is greater that a height of a second lower surface on which both the lower recovery port and the lower injection port are formed.
[0039] In the fifteenth embodiment of the present invention, each of the lower cells additionally includes: a sloping surface sloping from the first lower surface to the second lower surface.
[0040] In the sixteenth embodiment of the present invention, the upper cells include: upper injection ports welded to the lower injection ports of the lower cells, thereby sealing the lower injection ports.
[0041] In the seventeenth embodiment of the present invention, the upper cells additionally include: upper dampers that extend horizontally in the areas of the respective upper cells so as to act as dams to restrict the movement of a leaked electrolyte.
[0042] In the eighteenth embodiment of the present invention, the upper cells include: upper horizontal walls that extend horizontally so as to allow the upper labyrinth wall to be connected vertically; upper recovery ports that form walls that protrude from the lower surfaces of the upper cells, the upper recovery ports sealing upper ends of lower recovery ports that recover a leaked electrolyte from the lower cover into the battery box; first upper extension walls that slantly extend from the upper recovery doors; top guide walls that extend vertically from the first ends of the top horizontal walls; and top guide walls that extend vertically from the second ends of the top horizontal walls and form passages between the top guide walls and the top inner wall that extend in a direction equal to the directions of the top guide walls, guiding, thus, electrolyte and gas.
[0043] As described above, the present invention is advantageous in that when the upper and lower covers are assembled with one another, a labyrinth structure is formed by the separation walls of the respective covers, thereby increasing the battery box resistance to electrolyte leakage and minimizing electrolyte leakage between cells, and increasing the electrolyte recovery ratio.
[0044] Another advantage of the present invention resides in the fact that the recovery doors are arranged in such a way that they are placed at heights greater than the levels of the surface of the electrolyte stored in the respective chambers separate from the battery box even when the box The battery box is turned or tilted to one side, so that the present invention can prevent the electrolyte from leaking even when in a state in which the battery box tilts to one side.
[0045] A further advantage of the present invention resides in the fact that, to prevent the electrolyte from moving in the top cover even when the battery box is turned over, separation walls are formed in the top cover as well as in the bottom cover, of so that the present invention can prevent electrolyte from leaking even when the battery box is overturned, and the present invention can quickly recover the electrolyte when the battery box is recovered from the overturned state. BRIEF DESCRIPTION OF THE DRAWINGS
[0046] The above objectives and features and other objectives and features, and other advantages of the present invention will be more clearly understood from the following detailed description when taken in conjunction with the accompanying drawings, in which: Figure 1 is a view illustrating a related art technology; Figure 2 is a perspective view illustrating a battery in accordance with the present invention; Figure 3 is a bottom plan view of an upper cover of a battery cover for preventing leakage of electrolyte in accordance with the present invention; Figure 4 is an enlarged view illustrating a battery cover top cover cell for preventing electrolyte leakage in accordance with the present invention; Figure 5 is a top plan view of a lower cover of the battery cover for preventing leakage of electrolyte in accordance with the present invention; Figure 6 is an enlarged view illustrating a battery cover bottom cover cell for preventing electrolyte leakage in accordance with the present invention; Figure 7 is a side sectional view illustrating a labyrinth structure of the battery cover for preventing electrolyte leakage in accordance with the present invention; Figures 8 to 13 are plan views illustrating a tilted state of the lower cover of the battery cover to prevent leakage of electrolyte in accordance with the present invention; and Figure 14 is a plan view illustrating an overturned state of the top cover of the battery cover to prevent leakage of electrolyte in accordance with the present invention. Description of reference numerals 10: top cover 11: first top cell 12: second top cell 13: third top cell 11': sixth top cell 12': fifth top cell 13': fourth top cell 14: outer wall 15: doors gas discharge 16: upper inner wall 17: upper labyrinth walls 18: upper cell separation walls 20: lower cover 21: lower first cell 22: lower second cell 23: lower third cell 21': lower sixth cell 22': lower fifth cell 23': lower fourth cell 24: lower wall 25: lower cell separation walls 27: lower labyrinth walls 28: micro-holes 29: gas discharge holes 30: terminals 40: battery box 111: doors top recovery sections 112: top extension first walls 113: top injection port 114: top dampers 115: top horizontal wall 141: guide walls 161: top inner first wall r 162: upper second inner wall 162a: folded part 163: upper third inner wall 171: 172a, 172b: upper labyrinth walls 181: upper first cell partition wall 182: upper second cell partition wall 183: upper third cell partition wall upper cell separation 184: fourth wall of upper cell separation 185: center wall of lower cell 185a: upper round part 211: lower injection ports 211a: outer wall of injection port 212: lower recovery port 212a: lower surface DETAILED DESCRIPTION OF THE INVENTION
[0047] Hereinafter, preferred embodiments of a battery cover for preventing electrolyte leakage in accordance with the present invention will be described in detail with reference to the accompanying drawings.
[0048] Figure 2 is a perspective view illustrating a battery in accordance with the present invention;
[0049] As shown in Figure 2, the battery cover for preventing electrolyte leakage in accordance with the present invention includes a battery box 40 that stores a battery electrolyte therein, a lower cover 20 that is placed at one end the top of the battery box 40, and an upper cover 10 which is mounted to the upper end of the lower cover 20.
[0050] The interior of the battery box 40 is divided by a plurality of partition walls, thereby forming separate chambers that store electrolyte therein. The interior structure of the aforementioned battery box 40 is well known in the related art, and drawings and further explanation will be omitted from the following description.
[0051] The lower cover 20 closes and seals the upper end of the battery box 40 that stores electrolyte therein. Here, the lower cover 20 is provided therewith with electrical terminals 30, through which electricity produced by a chemical reaction of the electrolyte is introduced and emitted. Furthermore, the lower cover 20 is provided with one or more lower cells 21 to 23, 21' to 23' which are defined by separation. Here, the lower cells communicate with their separate chambers in the battery box.
[0052] The upper cover 10 which is mounted on the upper end of the lower cover 20 closes and seals the upper end of the lower cover 20 so as to prevent a gas leak or an electrolyte leakage from the lower cover 20. To that end , the top cover is provided with one or more top cells 11 to 13, 11' to 13' which are formed by separation. Here, the number of the upper cells is equal to that of the lower cells that are defined in the lower cover. The construction of the top cover 10 is illustrated in Figures 3 and 4.
[0053] Figure 3 is a bottom plan view of the top cover of the battery cover to prevent leakage of electrolyte in accordance with the present invention. Figure 4 is an enlarged view illustrating a battery cover top cover cell for preventing electrolyte leakage in accordance with the present invention.
[0054] As shown in Figures 3 and 4, the upper cover 10 is mounted on the upper end of the lower cover 20 so that it can seal the lower cover 20. For this purpose, the interior of the upper cover 10 is separated therein number of upper cells 11 to 13, 11' to 13' as to that of the one or more lower cells 21 to 23, 21' to 23' which are formed in the lower cover 20.
[0055] The upper cover 10 forms a flat surface on the upper surface thereof, and includes on the lower surface thereof one or more upper cells 11 to 13, 11' to 13' which are arranged on the lower surface in one direction; an outer wall 14 extending in horizontal and vertical directions so as to form a bead along the edge of the lower surface of the top cover 10; gas discharge ports 15, 15' extending from opposite outermost cells 11, 11' of one or more upper cells 11 to 13, 11' to 13' to outer wall 14 so as to discharge gas; an upper inner wall 16 which is formed projecting into outer wall 14 and extending in horizontal and vertical directions, thereby forming spaces for defining the one or more upper cells 11 to 13, 11' to 13'; and upper cell partition walls 18 extending within the upper inner wall 16 in vertical directions, thereby separating the one or more upper cells from one another.
[0056] The gas discharge ports 15, 15' are respectively formed in the outermost cells 11, 11' opposite the one or more upper cells 11 to 13, 11' to 13'. For example, a first upper cell 11 of one or more upper cells 11 to 13, 11' to 13' is formed at a first end of upper cover 10, and a sixth upper cell 11' of one or more upper cells 11 to 13 , 11' to 13' is formed at a second end of the top cover 10. Here, the first top cell 11 communicates with a first gas discharge port 151 at the first end of the top cover, and the sixth top cell 11' if communicates with a second gas discharge port 151' at the second end of the top cover.
[0057] The outer wall 14 is a wall that is formed by protruding along the edge of the lower surface of the top cover 10 and extending in the horizontal and vertical directions. The outer wall 14 extends in the vertical direction at opposite ends of the top cover, in which the first gas discharge port 151 and the second gas discharge port 151' are formed through the outer wall 14.
[0058] Here, both horizontal parts of the outer wall 14 is partially cut to form a locking cutout 142 which is locked to a locking protrusion (not shown) of the lower cover 20 when the upper cover 10 is placed at the end. top of bottom cover 20.
The upper inner wall 16 includes: a first upper inner wall 161 extending horizontally along the upper ends of the one or more upper cells 11 to 13, 11' to 13'; second upper inner walls 162, 162' which extend vertically from opposite ends of the first upper inner wall 161 and have respective bent portions 162a which are bent inwardly at opposite ends of the top cover 10 having the first gas discharge port 151 and the second gas discharge port 151'; and a third upper inner wall 163 extending horizontally between the ends of the second upper inner walls 162, 162' at a location opposite the first upper inner wall 161.
[0060] Here, the first upper inner wall 161 is formed by extending horizontally at a location between the upper horizontal portion of the outer wall 14 and the one or more upper cells. In particular, the first upper inner wall 161 is connected to both guide walls 141 that extend slantly from the outer wall 14 and the one or more upper labyrinth walls 17 that extend from the one or more upper cells and form a labyrinthine structure when the top cover 10 is mounted to the bottom cover 20.
The upper labyrinth walls 17 extend from the one or more upper cells 11 to 13, 11' to 13' to the first upper inner wall 161. Here, the upper labyrinth walls 17 are separated from one another at predetermined intervals. In the present invention, it is preferred that a pair of upper labyrinth walls 172a, 172b, 173a, 173b is formed in each of the upper cells 11 to 13, 11' to 13'. Of course, an upper labyrinth wall 171, not the pair of upper labyrinth walls, can be formed in each of the upper first cell 11 and the upper sixth cell 11' which are formed as the upper outermost cells of the upper cover 10 .
[0062] Here, the upper labyrinth walls 171 that are formed in the upper outermost cells 11, 11' are intended to prevent electrolyte from leaking from the neighboring upper cells 12, 12' into the upper outermost cells 11, 11' .
[0063] The upper cell partition walls 18 extend vertically to the third upper inner wall 163 which extends horizontally so that the upper cell partition walls 18 separate the one or more upper cells 11 to 13, 11' to 13' from each other. The upper cell partition walls 18 include a central lower cell wall 185 that is placed in the center of the upper cover 10 when the upper cover 10 is laid down horizontally.
[0064] In the following description, the directional term representing a direction oriented to the bottom cell central wall 185 will be called "inner side", and the directional term representing another direction oriented to the first and second gas discharge ports 151, 151' of the outermost cells 11, 11' of the top one or more cells 11 to 13, 11' to 13' will be called the "outer side".
[0065] The upper cell separation walls 18 include: a first upper cell separation wall 181 which separates the first upper cell 11 and the second upper cell 12 from each other; and a second upper cell separation wall 182 which separates the second upper cell 12 and the third upper cell 13 from one another.
The upper cell partition walls 18 further include a third upper cell partition wall 183 which separates the upper fourth cell 13' and the upper fifth cell 12' from each other, and a fourth upper cell partition wall 183. upper cell 184 which separates the upper fifth cell 12' and the upper sixth cell 11' from each other.
[0067] Here, both the first upper cell partition wall 181 and the second upper cell partition wall 182 extend vertically into a first end area in which the first gas discharge port 151 of the upper horizontal walls 115, 125 is located, and both the third upper cell partition wall 183 and the fourth upper cell partition wall 184 extend vertically into a second end area in which the second gas discharge port 151' of the upper horizontal walls 115 ', 125' is located. In other words, the upper cell separation walls 181, 182, 183, 184 extend vertically from the upper horizontal walls 115, 125, 135, 115', 125', 135' in the outermost areas of the respective upper cells.
[0068] Furthermore, the lower cell central wall 185 extends vertically at a location between the upper third cell 13 and the upper fourth cell 13', with an upper round portion 185a formed at the center of the lower cell central wall 185 of so that when the upper round portion 185a is combined with a lower round portion 251a of the lower cover 20, the upper and lower round portions 185a and 251a form a cylindrical structure which can increase the resistance to the moving electrolyte.
[0069] The one or more upper cells 11 to 13, 11' to 13' include: upper injection ports 113, 123, 133, 113', 123', 133' which are formed to match the lower injection ports 211, 221, 231, 211', 221', 231' of the lower cover 20; upper recovery ports 111, 121, 131, 111', 121', 131' that correspond to the lower recovery ports 212, 222, 232, 212', 222', 232' of the lower cover 20; gas supply ports 152, 152' that supply gas to gas discharge ports 15, 15'; upper buffers 114 extending horizontally out of the upper injection ports 113, 123, 133, 111', 123', 133' so that the upper buffers 114 extend horizontally in respective upper cells 11 to 13, 11' to 13 '; first upper extension walls 112 extending slantly from upper recovery doors 111, 121, 131, 111', 121', 131'; upper guide walls 116, 126 which form passageways to guide electrolyte to upper labyrinth walls 171, 172a, 172b, 173a, 173b; horizontal upper walls 115, 125, 135, 115', 125', 135' extending horizontally such that the upper horizontal walls are separated from the first upper inner wall 161 so that the upper horizontal walls are connected to the walls in upper labyrinths 171, 172a, 172b, 173a, 173b; and second upper extension walls 117 which form electrolyte movement passages in cooperation with upper recovery ports 111, 121, 131, 111', 121', 131'.
[0070] The one or more upper cells 11 to 13, 11' to 13' include: the upper second cell 12 and the upper third cell 13 which are disposed in a direction of the upper first cell 11 or the right outermost cell to the lower cell central wall 185; and the upper fourth cell 13' and the upper fifth cell 12' which are disposed in a direction from the lower cell central wall 185 to the upper sixth cell 11' or the leftmost outer cell.
[0071] Here, the first top cell 11 and the sixth top cell 11' are the opposite outermost cells of the top cover 10 and communicate with the first gas discharge port 151 and the second gas discharge port 151', respectively. The two outermost top cells 11, 11' include respective gas supply holes 152, 152' which are not provided in the second through fifth top cells 12 to 12'.
[0072] The gas supply ports 152, 152' include: a first gas supply port 152 that communicates with and supplies gas to the first gas discharge port 151 at the first end of the first upper cell 11; and a second gas supply port 152' which communicates with and supplies gas to the second gas discharge port 151' at the second end of the upper sixth cell 11'.
[0073] The first and second gas supply ports 152, 152' communicate with the first gas discharge port 151 and the second gas discharge port 151', respectively. Here, each of the gas supply ports 152, 152' includes: an open inlet 152a; an outer wall 152c that projects around the open inlet 152a to form a wall that surrounds the inlet 152a; and at least one cutout 152b that is formed by cutting outer wall 152c and guides gas and electrolyte, which leak out of outer wall 152c, to inlet 152a.
[0074] In other words, each of the gas supply ports 152, 152' functions to guide gas and electrolyte flowing to the inlet 152a through the cutout 152b to an associated port between the first gas discharge port 151 and the second gas discharge port 151'.
[0075] The upper buffers 114 are formed in the shape of the dams that extend from the respective upper injection ports 113, 123, 133, 111', 123', 133' in directions oriented towards the end areas in which the outermost cells are located and oriented to the center in which the lower cell central wall 185 is located, so that the dampers 114 extend horizontally in the respective upper cells 11 to 13, 11' to 13'. Here, the upper dampers 114 act as dams that prevent the electrolyte, which leaks from both the upper injection ports 113, 123, 133, 111', 123', 133' and the upper recovery ports 111, 121, 131, 111 ', 121', 131', move into spaces behind the upper bumpers 114.
[0076] The upper horizontal walls 115, 125, 135, 115', 125', 135' are walls that extend horizontally in the one or more upper cells 11 to 13, 11' to 13' and are connected to the respective separation walls of upper cells 18 at the outer ends of the same. In other words, the upper horizontal walls 115, 125, 135, 115', 125', 135' are connected to the respective upper cell separation walls 18 at the outer ends thereof and are connected to the respective upper guide walls 116, 126 at the inner ends of the same.
[0077] The first upper extension walls 112 extend from the upper recovery doors 111, 121, 131, 111', 121', 131' in directions oriented to the opposite outermost ends so that the ends of the first upper extension walls 112 form spaces in cooperation with the upper cell separation walls 18, thereby defining electrolyte movement passages.
[0078] The upper guide walls 116, 126 extend vertically from the inner ends of the upper horizontal walls 115, 125, 135, 115', 125', 135' to the outer surfaces of the upper injection ports 113, 123, 133, 113', 123', 133' after passing through the upper recovery doors 111, 121, 131, 111', 121', 131'. Here, the upper guide walls 116, 126 extend vertically in a state in which the upper guide walls 116, 126 are separated from the upper cell separating walls 18. The upper guide walls 116, 126 are combined with the respective ones. lower guide walls 218 of the lower cover 20, which will be described later in this document, thereby guiding the leaking electrolyte to a labyrinth structure that is formed by both the upper labyrinth walls 17 and the lower labyrinth walls 27.
[0079] The upper second extension walls 117 extend from the outer surfaces of the gas supply holes 152, 152' in directions oriented to the upper first extension walls 112 in a state in which the upper second extension walls 117 are separated from the external surfaces of upper recovery ports 111, 111'. Here, the upper second extension walls 117 define electrolyte passages between the upper second extension walls 117 and the outer surfaces of the upper recovery ports 111, 111'. In addition, to maintain a constant gap between each second upper extension wall 117 and an associated port among the upper recovery doors 111, 111', the upper second extension walls 117 extend concentrically outward from the upper recovery doors 111 , 111'. In other words, when the outer surfaces of the upper recovery doors 111, 111' form round surfaces, each of the second upper extension walls 117 extends in the form of a round wall.
[0080] Furthermore, the distal ends of the second upper extension walls 117 are separated from the first upper extension walls 112 and form gaps therebetween, thereby guiding the electrolyte to the first upper extension walls 112.
[0081] When the upper injection ports 113, 123, 133, 113', 123', 133' are placed at the upper ends of the respective lower injection ports 211, 221, 231, 211', 221', 231' of the cover lower 20, the upper injection ports 113, 123, 133, 113', 123', 133' seal the lower injection ports 211, 221, 231, 211', 221', 231' of the lower cover 20, in which the electrolyte is injected into the battery box through the lower injection ports 211, 221, 231, 211', 221', 231'. To accomplish this function, the upper injection ports 113, 123, 133, 113’, 123’, 133’ have the same shapes as those of the lower injection ports 211, 221, 231, 211’, 221’, 231’.
[0082] Furthermore, it is required that the upper recovery ports 111, 121, 131, 111', 121', 131' be hermetically joined to the upper ends of the respective lower recovery ports 212, 222, 232, 212', 222 ', 232' of the lower cover 20, so that the upper retrieval port 111, 121, 131, 111', 121', 131' has the same shapes as those of the lower retrieval ports 212, 222, 232, 212', 222', 232'.
[0083] Here, the upper injection ports 113, 123, 133, 111', 123', 133' and the upper recovery ports 111, 121, 131, 111', 121', 131' are placed in respective cells of the top cover 10 at locations near the center of top cover 10.
[0084] Consequently, the upper injection ports 113, 123, 133 and the upper recovery ports 111, 121, 131 that are formed in the first to third upper cells 11, 12, 13 of the upper cover 10 are placed in the areas of the first the third upper cells 11 to 13 at locations close to the central lower cell wall 185, respectively.
[0085] Likewise, the upper injection ports 113', 123', 133' and the upper recovery ports 111', 121', 131' which are formed in the fourth to sixth upper cells 11' to 13' of the cover The upper 10 are placed in the areas of the fourth to sixth upper cells 11' to 13' at locations proximate the central wall of lower cell 185, respectively.
[0086] Furthermore, each of the first upper cell 11 and the sixth upper cell 11' has an upper guide wall 186 extending from the outer wall 152c of the gas supply port 152, 152'. The upper guide walls 186 form passageways in cooperation with the respective upper second inner walls 162, 162' so as to guide the electrolyte to the upper labyrinth walls 171.
[0087] Hereinafter, the construction of the lower cover 20 that will be assembled with the aforementioned upper cover 10 will be described in detail with reference to Figures 5 and 6.
[0088] Figure 5 is a top plan view of the lower cover of the battery cover to prevent leakage of electrolyte in accordance with the present invention. Figure 6 is an enlarged view illustrating a battery cover bottom cover cell for preventing electrolyte leakage in accordance with the present invention.
[0089] As shown in Figures 5 and 6, the lower cover 20 includes: one or more lower cells 21 to 23, 21' to 23' which are defined as a plurality of separate spaces; a bottom wall 24 extending horizontally and vertically so that the one or more bottom cells 21 to 23, 21' to 23' are placed within the bottom wall 24; lower cell separation walls 25 extending vertically between the one or more lower cells 21 to 23, 21' to 23' and separating the lower cells from one another; bottom labyrinth walls 27 extending from bottom horizontal walls 215, 225, 235, 215', 225', 235' of respective bottom cells 21 to 23, 21' to 23' to bottom wall 24; and micro-holes 28 and gas discharge holes 29 for discharging gas.
[0090] The bottom wall 24 includes a first bottom wall 241 that extends horizontally at a location external to the horizontal sides of the one or more bottom cells 21 to 23, 21' to 23'; second bottom walls 242, 242' extending vertically from opposite ends of first bottom wall 241; and a third bottom wall 243 extending from the ends of the second bottom walls 242, 242' so that the third bottom wall 243 connects the ends of the second bottom walls 242, 242'.
[0091] The first bottom wall 241 extends horizontally outside the horizontal sides of the one or more bottom cells 21 to 23, 21' to 23', and second bottom walls 242, 242' extend vertically in the first and second areas of the end of the first and sixth lower cells 21, 21' which are the outermost cells of the one or more lower cells 21 to 23, 21' to 23'.
[0092] Here, the second lower walls 242, 242' extend in such a way that the middle portions thereof are folded inwards (towards the center) to form folded parts 242a, 242a' corresponding to the discharge ports of gas 15, 15' of the top cover 10.
[0093] The third bottom wall 243 extends into the opposite outermost cells 21, 21' and defines a space between the third bottom wall 243 and the one or more bottom cells 21 to 23, 21' to 23', in which lower labyrinth walls 27 corresponding to upper labyrinth walls 17 are formed. Here, the third bottom wall 243 defines a passage for guiding electrolyte between the third bottom wall 243 and the one or more bottom cells 21 to 23, 21' to 23' so that the one or more bottom labyrinth walls 27 can be formed.
[0094] The lower cell separation walls 25 extend between the lower cells and separate the lower cells from each other. The lower cell partition walls 25 include a lower cell central wall 251 which corresponds to the lower cell central wall 185 of the upper cover 10.
[0095] Here, in the second lower cell 22 to the fifth lower cell 22', the lower cell separation walls 25 extend vertically at remote locations from the lower cell central wall 251 closer to the outermost cells 21, 21'. Here, the first bottom cell 21 and the sixth bottom cell 21' are defined in the outermost areas of the bottom cover 20 by the second bottom walls 242, 242'.
[0096] Furthermore, in the second lower cell 22, the third lower cell 23, the fourth lower cell 23' and the fifth lower cell 22', the lower cell separation walls 25 are placed in the outermost areas. Consequently, the lower cell separating walls 25 are symmetrically formed at respective locations on opposite sides of the lower cell central wall 251.
[0097] Here, the lower cell central wall 251 separates the lower third cell 23 and the lower fourth cell 23' from each other and has a lower round part 251a which is formed by bending the middle portion of the central cell wall lower 251. Round lower portion 251a of lower cover 20 combines with upper round portion 185a of upper cover 10 so that they form a cylindrical structure.
[0098] When the upper cover 10 and the lower cover 20 are assembled together, the lower round part 251a and the upper round part 185a are combined with each other and increase the resistance to the electrolyte moving along the passages defined by both the lower guide walls 218 and the upper guide walls 116, 126.
[0099] The one or more lower cells 21 to 23, 21' to 23' are grouped in directions of the lower outermost cells 21, 21', in which the first gas discharge port 151 and the second gas discharge port 151' of the upper cover 10 are placed, at the center on which the lower cell central wall 251 is placed. Here, the separation between the lower cells is carried out by the lower cell separation walls 25.
[00100] In other words, the first lower cell 21 and the sixth lower cell 21' are defined as the opposite outermost areas of the lower cover 20. In addition, the lower recovery ports 212, 222, 232 and the lower injection ports 211, 221, 231 are formed in the first to third lower cells 21, 22, 23, while lower recovery ports 212' through 232' and lower injection ports 211' through 231' of the fourth through sixth lower cells 21' through 23' are formed at locations opposite to those of the first to third lower cells 21 to 23.
[00101] Hereinafter, the construction of the above-mentioned one or more lower cells will be described in more detail.
[00102] The one or more lower cells 21 to 23, 21' to 23' include: the lower injection ports 211, 221, 231, 211', 221', 231' through which an electrolyte is injected; lower recovery ports 212, 222, 232, 212', 222', 232' through which a leaking electrolyte is recovered; the gas discharge holes 29 which are formed through the lower surfaces of the lower cells so as to discharge gas from the battery box 40, and the micro holes 28 which are formed exclusively in the lower outermost cells (e.g., in the first cell lower 21 and in the lower sixth cell 21') of the one or more lower cells 21 to 23, 21' to 23'; first lower extension walls 213 extending from the outer surfaces of lower recovery ports 212, 222, 232, 212', 222', 232' so that the distal ends thereof are separated from the lower horizontal walls 215, 225 , 235, 215', 225', 235', thus forming the passages of electrolyte movement; second lower extension walls 217 extending from the lower guide walls 216 so that the second lower extension walls 217 form a shape that corresponds to the outer surfaces of the lower recovery ports 212, 212' and form guide passages of electrolyte between second lower extension walls 217 and lower recovery ports 212, 212'; third, lower extension walls 214 extending outwardly from lower injection ports 211, 221, 231, 211', 221', 231' to mate with upper dampers 114; the lower guide walls 218 extending vertically from the lower injection ports 211, 221, 231, 211', 221', 231' so that the lower guide walls 218 correspond to the upper guide walls 116, 126 and define electrolyte guide passages; the lower horizontal walls 215, 225, 235, 215', 225', 235' extending horizontally from the lower ends of the lower guide walls 218 and forming horizontal walls in the respective lower cells; the lower guide walls 216 which form passages to guide the electrolyte to the gas supply holes 152, 152' of the upper cover 10; and an inclined surface 265 connecting two lower surfaces 261, 262 that have different heights in each of the lower cells 21 to 23, 21' to 23'.
[00103] The lower injection ports 211, 221, 231, 211', 221', 231' are formed down through the lower surfaces of the lower cells so that electrolyte can be injected into the battery box through the injection ports lower. Here, each of the lower injection ports 211, 221, 231, 211’, 221’, 231’ has a circular shape, in which a protruding wall surrounds an electrolyte inlet. Here, in the related art, the upper ends of the lower injection ports are sealed through the use of plugs, so when an electrolyte is collected in the areas around the plugs, the electrolyte can corrode the plug springs or valves and can cause electrolyte leaks from the battery.
[00104] However, in the present invention, the lower injection ports 211, 221, 231, 211', 221', 231' are joined to the upper injection ports of the upper cover 10 by thermal welding or ultrasonic welding so that the present invention can effectively seal the lower injection ports without using additional parts.
[00105] The lower recovery ports 212, 222, 232, 212', 222', 232' are placed in the one or more lower cells 21 to 23, 21' to 23' and recover the electrolyte that leaks from the battery box 40 To accomplish this function, each of the lower retrieval ports 212, 222, 232, 212', 222', 232' includes: a circular lower surface 212a; one or more recovery holes 212b that are formed on the outer side of the lower surface 212a so as to allow electrolyte to enter or exit; an outer wall 212c that projects upwardly outwardly from both the lower surface 212a and the recovery holes 212b and surrounds both the lower surface 212a and the recovery holes 212b; and an indented hole 212d which is formed by partially cutting the outer wall 212c of the recovery port and allows leaking electrolyte to flow therethrough.
[00106] The present invention can prevent an electrolyte leakage through the use of both the upper buffers 114 and the labyrinth structure that is formed by both the upper cover 10 and the lower cover 20, so that the present invention can realize a simple a construction comprising the one or more retrieval holes 212b and the outer wall 212c of the lower retrieval ports 212, 222, 232, 212', 222', 232'.
[00107] The recovery holes 212b are formed on the outside of the lower surface 212a and guide the leaking electrolyte into the battery box 40. In the above state, the recovered electrolyte or the leaking electrolyte can be recovered or it can leak through of the passages 263 which are defined between the first lower extension walls 213 and the lower guide walls 216.
[00108] Furthermore, the outer wall 212c of each lower recovery port projects upward from the outside of the recovery holes 212b and the lower surface 212a, in which the opposite ends of the outer wall 212c are separated from each other and form the jagged hole 212d. Here, unlike the related art in which a plug is provided at the upper end of the outer wall 212c of each lower recovery port, the present invention does not use such a plug.
[00109] Here, the lower surface 212a is configured so that it has a different height than the heights of the recovery holes 212b. In other words, the bottom surface 212a is formed at a location whose height is greater than the heights of the recovery holes 212b so that the leaking electrolyte can flow into the recovery holes 212b.
[00110] Here, when the top cover 10 and the bottom cover 20 are mounted together in a battery cover, the lower recovery ports 212, 222, 232, 212', 222', 232' and the lower injection ports 211, 221, 231, 211', 221', 231' of lower cells 21 to 23, 21' to 23' are joined to the upper recovery ports and upper injection ports of the upper casing 10, respectively. Consequently, it is required to form the recovery ports and injection ports of the lower cells 21 to 23, 21' to 23' in locations such that the ports are aligned with the recovery ports and injection ports of the upper cells. In other words, the lower recovery ports 212, 222, 232, 212', 222', 232' and the lower injection ports 211, 221, 231, 211', 221', 231' are formed in respective cells 21 a 23, 21' to 23' of the lower cover 20 at locations near the center of the lower cover 20.
[00111] For example, when the lower cover 20 includes the first to sixth lower cells 21 to 23, 21' to 23', the lower recovery port 212 and the lower injection port 211 of the first lower cell 21 which is one of lower outermost cells 21, 21', in which the gas discharge ports 15, 15' of the upper cover 10 are placed at the outer ends respectively, are formed at locations on the opposite side of the first gas discharge port 151. Thus, in each of the second lower cell 22 and the third lower cell 23, the lower recovery port 222, 232 and the lower injection port 221, 231 are formed in opposite positions, based on the first gas discharge port 151.
[00112] Furthermore, in the lower sixth cell 21' in which the second gas discharge port 151' is placed in an area around the second end of the lower sixth cell 21', the lower recovery port 212' and the port injection tubes 211' are formed at respective locations on opposite sides of the second gas discharge port 151'. Likewise, in each of the lower fourth cell 23' and the lower fifth cell 22', the lower recovery port 232', 222' and the lower injection port 231', 221' are formed at opposite locations, with base on the second gas discharge port 151'.
[00113] Consequently, the first to third lower cells 21 to 23, the lower recovery ports 212, 222, 232 and the lower injection ports 211, 221, 231 are placed in areas around the second ends of the respective lower cells 21 to 23. In the fourth to sixth lower cells 23' to 21', the lower recovery ports 232', 222', 212' and the lower injection ports 231', 221', 211' are placed in areas around the first ends of the respective lower cells 23' to 21'.
[00114] Briefly described, the one or more lower cells 21 to 23, 21' to 23' are arranged in such a way that the lower recovery ports 212, 222, 232, 212', 222', 232' and the lower injection ports 211, 221, 231, 211', 221', 231' are placed in a predetermined location and are angled towards opposite outermost ends, in which the first and second gas discharge ports 151, 151' are placed respectively at the center of the lower cover 20. In other words, the lower recovery ports and the lower injection ports of the lower cover 20 are grouped at symmetrical locations on opposite sides of the lower cell central wall 251.
[00115] The operational function that can be realized by the aforementioned grouping of the lower recovery ports 212, 222, 232, 212', 222', 232' and the lower injection ports 211, 221, 231, 211', 221', 231' will be described later in this document.
[00116] Each of the gas discharge ports 29 is formed at a location between the outer wall 212c of an associated lower recovery port 212, 222, 232, 212', 222', 232' and an associated lower horizontal wall 215 , 225, 235, 215', 225', 235' and functions to discharge gas from battery box 40. Here, gas discharge holes 29 are arranged in respective lower cells 21 to 23, 21' to 23' in a predetermined location and are inclined in the directions of the outermost ends opposite the center of the lower cover 20 in the same manner as described for the lower recovery ports 212, 222, 232, 212', 222', 232' and the lower injection ports 211, 221, 231, 211', 221', 231'.
[00117] The lower guide walls 218 extend vertically from the lower injection ports 211, 221, 231, 211', 221', 231' so that they are separated from the lower cell separation walls 25, 251 , thereby forming the electrolyte passages 266. In addition, the lower guide walls 218 have a shape corresponding to that of the upper guide walls 116, 126 of the upper cover 10.
[00118] The micro-holes 28 are formed through flat surfaces that are in close contact with the lower guide walls 218, so that the micro-holes 28 communicate with the interior of the battery box 40, thereby discharging , the gas from the battery box 40.
[00119] The third lower extension walls 214 are shaped to match that of the upper buffers 114 of the upper cover 10 and extend horizontally from the outer wall 211a of the lower injection ports 211, 221, 231, 211', 221' , 231'. Here, the distal ends of the third lower extension walls 214 are separated from the second lower walls 242, 242' of the lower wall 24, thereby forming electrolyte passages.
[00120] The lower horizontal walls 215, 225, 235, 215', 225', 235' are walls that extend horizontally in the respective lower cells 21 to 23, 21' to 23' such that predetermined spans are between the walls lower horizontals and the third lower wall 243. Here, the lower horizontal wall 215 is connected to the end of the lower guide wall 216 at the first end thereof and is connected to the lower guide wall 218 at the second end thereof.
[00121] Consequently, the lower guide walls 218 form electrolyte passages in cooperation with the lower cell separation walls 25, 251 and the electrolyte passages communicate with the electrolyte passages that are defined between the third lower wall 243 and the lower horizontal walls 215, 225, 235, 215', 225', 235'.
[00122] The lower guide walls 216 are combined with the upper guide walls 186 of the top cover 10, thereby defining electrolyte guide passages through which the electrolyte can be guided to the gas supply holes 152. 152' of the top cover 10. Here, the lower guide walls 216 are formed outside the receptacle portions in which the gas discharge ports 15, 15' of the top cover 10 are placed. Bottom guide walls 216 extend to bottom horizontal walls 215, 215' along second bottom walls 242, 242' in a state in which bottom guide walls 216 are separated from second bottom walls 242, 242', defining, thus, electrolyte passages between them. Consequently, the lower guide walls 216 define electrolyte passages in cooperation with the second lower walls 242, 242' and the electrolyte passages communicate with the electrolyte passages that are defined between the third lower walls 243 and the lower horizontal walls 215 , 215'.
[00123] The first lower extension walls 213 slantly extend from the outer walls 212c of the lower recovery doors 212, 212' so that the distal ends of the first lower extension walls 213 can be separated from the guide walls bottoms 216 or the bottom horizontal walls 215, 215', thereby defining the electrolyte passages 263 therebetween.
[00124] Second lower extension walls 217 have a shape (eg a round shape) that matches the shape of the outer walls of lower recovery doors 212, 212’. The second lower extension walls 217 extend from the outer walls of the gas discharge ports 15, 15' so that the electrolyte passages 263 can be defined between the second lower extension walls 217 and the outer walls 212c of the ports. of recovery 212, 212'. Here, it is preferred that each of the second lower extension walls 217 is configured so that the wall 217 can maintain a constant span between the wall 217 and the outer wall 212c of an associated lower recovery port 212, 212' throughout. the length of the second lower extension wall 217.
[00125] Each of the slanted surfaces 265 is formed slanted between the first lower surface 261, in which a passage is defined between the lower guide wall 218 and the lower cell separating wall 25, 251, and the second surface lower 262 in which both lower injection port 211, 221, 231, 211', 221', 231' and lower recovery port 212, 222, 232, 212', 222', 232' are formed. The first lower surface 261 is placed at a greater height than the second lower surface 262. The function of the sloped surfaces 265 is to delay the movement of the leaking electrolyte towards the outermost ends of the center, and to quickly recover the electrolyte through the ports of lower recovery 212 by rapidly moving the electrolyte in directions from the center to the outermost extremities.
[00126] A protrusion wall 219 slantly extends from each of the lower cell separation walls 25, 251 and increases the resistance to electrolyte movement in the passages 266 that are defined between the lower guide walls 218 and the lower cell separation walls 25, 251.
[00127] Lower labyrinth walls 27 extend vertically between lower horizontal walls 215, 225, 235, 215', 225', 235' and lower third wall 243. As shown in Figure 5, a lower labyrinth wall 27 is formed in each of the second to fifth lower cells 22', as an example. However, it should be understood that at least one inferior labyrinth wall can be formed in each inferior cell.
[00128] Hereinafter, electrolyte leakage and electrolyte recovery in a state in which the above-mentioned upper and lower covers 10 and 20 of the present invention are mounted together in a battery cover will be described in detail. For ease of description, the first upper cell 11 of the upper cover 10 and the first lower cell 21 of the lower cover 20 will be called examples of the upper and lower cells 11, 12, 13, 11', 12', 13', 21, 22, 23, 21', 22', 23' in the following description, when necessary.
[00129] First, a worker places the lower cover 20 on the battery box 40 and injects an electrolyte into the battery box 40 through the lower injection port 211. Thereafter, the worker securely mounts the upper cover 10 to the upper end of the lower cover 20 through the use of an ultrasonic welding process or other method.
[00130] In the above state, the upper injection port 113 of the upper cover 10 is hermetically seated on the lower injection port 211 of the lower cover 20. In addition, the lower end of the second upper inner wall 162 of the upper cover 10 is seated on the upper end of the second lower walls 242 of the lower cover 20. In addition, the gas discharge port 15 of the upper cover 10 discharges gas that has been introduced through a passage defined between a wall, which is formed by both the lower guide wall 216 and the upper guide wall 186, and another wall is formed by both the second lower wall 242 and the second upper inner wall 162.
Here, the upper recovery port 111 of the upper cover 10 is seated on the lower recovery port 212 of the lower cover 20, so that the upper end of the lower recovery port 212 can be effectively sealed. Therefore, a leaking electrolyte can be effectively recovered through the one or more undercut holes 212d that are formed in the lower recovery port 212.
[00132] Furthermore, the upper end of the third lower extension wall 214 of the lower cover 20 comes into close contact with the upper buffer 114 of the upper cover 10 and forms an electrolyte passageway in cooperation with the second lower wall 242. , the lower end of the upper guide wall 116 and the upper end of the lower guide wall 218 are joined together, thereby forming an electrolyte passageway in cooperation with the upper cell partition wall 181.
[00133] Here, the original function of the lower recovery port 212 is to recover the electrolyte into the battery box. However, when the battery tilts to one side or is turned over, electrolyte may leak from the battery box through the lower recovery port 212. In an effort to prevent this leakage, in the related art, a plug is inserted into the lower recovery port 212. However, in the present invention, the upper labyrinth walls 17, lower labyrinth walls 27, upper dampers 114 and lower recovery ports 212, 222, 232, 211', 222', 232' are grouped into one predetermined location and are angled toward the center of the battery cover so that the present invention can minimize electrolyte leakage and can intercept electrolyte movement to neighboring cells. Consequently, in the present invention, it is not required to use plugs in the lower recovery ports 212.
[00134] Here, the electrolyte that leaks from the lower recovery port 212 flows through the passage as shown by an arrow in Figure 6. In other words, the electrolyte leaks through the indented hole 212d of the lower recovery port 212 and primarily flows through of the passage that is defined between the first lower extension wall 213 and the lower guide wall 216. Thereafter, the electrolyte flows to the third lower extension wall 214 through the passage that is defined between the second lower extension wall 217 and the lower recovery port 212. In addition, the electrolyte reaches the sloped surface through the electrolyte passage that is defined between the third lower extension wall 214 and the second lower wall 242.
[00135] Here, the electrolyte encounters resistance from the labyrinth structure that is formed by both the second lower extension wall 217 and the first lower extension wall 213, so that the flow velocity of the electrolyte is greatly reduced. Electrolyte movement encounters additional resistance from the sloped surface 265.
[00136] In the above state, the amount of electrolyte that has encountered resistance of the inclined surface 265 is gradually increased and passes over the inclined surface 265, so that the electrolyte flows through the electrolyte passage that is defined between the lower guide wall 218 and the lower cell separation wall 25 and flow in the electrolyte passage 264 which is defined between the lower horizontal wall 215 and the third lower wall 243, thereby reaching the labyrinth structure that is formed by both the upper labyrinth wall. 17 and through the lower labyrinth wall 27.
In the top cover 10, the top labyrinth wall 17 comprises a pair of top labyrinth walls 172a, 172b that are separate from one another. In the above state, the lower labyrinth wall 27 is placed below the middle portion between the pair of upper labyrinth walls 172a, 172b. The aforementioned arrangement of upper and lower labyrinth walls is shown in Figure 7.
[00138] Figure 7 is a side sectional view illustrating the labyrinth structure of the battery cover to prevent electrolyte leakage in accordance with the present invention.
[00139] As shown in Figure 7, when the upper cover 10 is placed on the upper end of the lower cover 20, the upper end of the lower labyrinth wall 27 is placed between the upper labyrinth walls 17 that are separated from each other.
[00140] Consequently, the electrolyte that leaks through the lower recovery port 212, the micro-orifice 28 or the gas discharge port 29 flows through the electrolyte passage that is defined between the third lower extension wall 214 and the second bottom wall 242, and passes over the sloping surface, and flows through the electrolyte passage that is defined between the bottom guide wall 218 and the bottom cell separation wall 25. In the above state, the electrolyte passes under the bottom end of the upper labyrinth wall 172a and flows upwards to pass over the lower labyrinth wall 27 and flows downwards to pass under the lower end of the upper labyrinth wall 172b. Consequently, the resistance to movement of the electrolyte is increased so that the electrolyte cannot move to a neighboring cell or to the gas discharge port 15, but returns to its original location, thereby being effectively recovered through of the lower recovery port 212.
[00141] In other words, in the present invention, the electrolyte that leaks through the lower recovery ports 212, 222, 232, 212', 222', 232', the gas discharge holes 29 or the micro-holes 28 is restricted from moving to neighboring cells by the labyrinth structure which is formed by both upper labyrinth walls 17 and lower labyrinth walls 27, but is effectively retrieved by lower retrieval ports 212, 222, 232, 212', 222 ', 232' of the respective lower cells.
[00142] In addition, in the battery cover to prevent electrolyte leakage in accordance with the present invention, the upper recovery ports 111, 121, 131, 111', 121', 131' and the lower recovery ports 212, 222, 232, 212', 222', 232' are grouped in the respective cells of the upper cover 10 and the lower cover 20 at a predetermined location and are inclined towards the centers of the covers 10, 20. This arrangement of the upper recovery doors and from the lower recovery ports is intended to recover the leaking electrolyte to the recovery ports by restricting a movement of the leaking electrolyte when the electrolyte leaks from the battery box in a state where the battery tilts to one side.
[00143] Furthermore, in the present invention, the upper buffers 114 are provided in the upper cover 10 so that, even when the battery is turned over, the electrolyte that is placed in an area between the upper injection port 113 and the Top 111 recovery can be prevented from moving to another area.
[00144] The tilted state and the overturned state of the battery will be described in detail with reference to Figures 8 and 9, respectively.
[00145] Figures 8 to 13 are views illustrating a state of inclination of the lower cover of the battery cover to prevent leakage of electrolyte in accordance with the present invention, in which Figure 8 is a perspective view illustrating a state of the battery tilt, in which the top cover is placed facing forward, and Figure 9 is a plan view illustrating a state in which the electrolyte is leaking in the lower cover tilt state shown in Figure 8.
[00146] Figures 8 and 9 show that a battery to which the present invention is adapted tilts to one side because a vehicle that has the battery moves along a steep slope or because a user moves the battery in a state in which the battery is tilted to the side, or because the battery tilts to the side due to an external shock so that the top of the battery is facing forward in which the terminals are placed in a lower part and the top cover 10 and the lower cover 20 are placed on an upper part.
[00147] As shown in the drawings, the lower slanted cells 21 to 23, 21' to 23', the lower injection ports 211 to 231, 211' to 231' are placed on tops, and the recovery ports 212, 222 , 232, 212', 222', 232' are placed in the lower parts so that the electrolyte can leak through the recovery ports 212, 222, 232, 212', 222', 232' of the lower cells 11 to 13, 11' to 13'.
[00148] However, the present invention includes the micro-holes 28 and the gas discharge orifices 29, so that gas can be discharged either through the micro-holes 28 or through the gas discharge orifices 29. Therefore, in the present invention, a pressure that can push the electrolyte to the recovery ports 212, 222, 232, 212', 222', 232' is not generated, so that the amount of leakage of the electrolyte in the aforementioned tilt state can be effectively limited.
[00149] For example, when a battery that is neither provided with micro-holes 28 nor with gas discharge holes 29 in the lower cells 21 to 23, 21' to 23' tilts to one side or is turned over, a discharge of gas pressure pushing the gas out through the recovery ports 212, 222, 232, 212', 222', 232' acts on the battery box 40 and, in the above state, a large amount of electrolyte can easily leak from the battery box together with the gas discharged by gas pressure discharge.
[00150] Meanwhile, the present invention includes the gas discharge holes 29 in the respective lower cells 21 to 23, 21' to 23'. Particularly, the present invention further includes the micro-holes 28 in the lower outermost cells which are the first lower cell 21 and the sixth lower cell 21'. Consequently, gas discharge passages for discharging gas from the battery box 40 are defined in the battery cover of this invention, so that a pressure that can discharge electrolyte from the battery box to the outside is not generated in the battery.
[00151] Figures 10 and 11 illustrate a state of the battery in which the lower and upper parts of the battery are placed in locations opposite to those in Figures 8 and 9, in which Figure 10 is a perspective view illustrating a state in which the battery is turned over so that the top cover 10 is facing forward, and Figure 11 is a plan view illustrating the bottom cover 20 in a state in which the battery is turned over in the same manner as that of Figure 10.
[00152] Operation of the battery cover in the battery's flipped state will be described with reference to Figures 10 and 11. When the battery is flipped as shown in Figure 10, the recovery ports 212, 222, 232, 212', 222' , 232' are placed in upper parts of the respective lower cells 21 to 23, 21' to 23' and the lower injection ports 211, 221, 231, 211', 221', 231' are placed in lower parts. In the above state, since the recovery ports 212, 222, 232, 212', 222', 232' are placed on the tops, a small amount of electrolyte can leak from the battery box during a process in which the battery is depleted. standing vertically from a tilted state. However, when the battery is fully upright, vertically, the recovery ports 212, 222, 232, 212', 222', 232' are completely placed on the tops so that the battery cover of the present invention can stop the electrolyte leakage.
[00153] Particularly, in the present invention, the lower injection ports 211, 221, 231, 211', 221', 231' and the upper injection ports 113, 123, 133, 113', 123', 133' are hermetically sealed. welded together, so that the lower injection ports 211, 221, 231, 211', 221', 231' are completely sealed and therefore do not allow leakage of the electrolyte.
[00154] Furthermore, when the battery recovers its original upright position, the leaking electrolyte can be recovered through recovery ports 212, 222, 232, 212', 222', 232' so that the present can prevent effective that the electrolyte is leaked to the outside.
[00155] Figure 12 is a perspective view illustrating a battery tilt state in which the battery of Figure 10 is placed upright vertically after being rotated to the left. Figure 13 is a plan view illustrating the bottom cover 20 in the tilted state of the battery as shown in Figure 12.
[00156] As shown in Figures 12 and 13, in the respective lower cells 21 to 23, 21' to 23' of the lower cover 20 of the present invention, the lower recovery ports 212, 222, 232, 212', 222', 232 ' are placed in a predetermined location and are slanted towards the lower cell center wall 251. Consequently, when the battery is slanted as shown in Figures 12 and 13, the first lower cell 21 is placed in the lowermost location, while the sixth bottom cell 21' is placed at the top most location. In the aforementioned battery tilt state, recovery ports 212, 222, 232 which are formed in the first to third lower cells 21 to 23 at a predetermined location and are inclined towards the lower cell center wall 251 are placed in upper parts in the areas of the respective lower cells 21 to 23.
[00157] On the contrary, the recovery ports 212', 222', 232' of the fourth to sixth lower cells 21' to 23' are formed in the areas of the respective cell at a predetermined location and are inclined towards the central cell wall lower 251, so that the retrieval ports 212', 222', 232' in the aforementioned tilt state of the battery are placed at lower parts in the cell areas of the respective lower cells 21' to 23'.
[00158] Consequently, since the recovery ports 212', 222', 232' of the fourth to sixth lower cells 21' to 23' are placed at the bottoms in the areas of the respective cell, the heights of the recovery ports 212', 222', 232' are lower than the surface levels of the electrolyte that is stored in the separate chambers of the battery box 40 so that electrolyte leaks from the battery box through the recovery ports 212', 222', 232'. However, in the above box, a discharge pressure is effectively exhausted both through the gas discharge holes 29 and through the micro holes 28, so that the electrolyte that leaks from the battery box through the recovery ports 212' , 222', 232' of the fourth to sixth lower cells 21' to 23' cannot pass over the first lower extension walls 213', 223', 233'.
[00159] On the contrary, the retrieval ports 212, 222, 232 of the first to third lower cells 21 to 23 are placed in upper parts in the areas of the respective cell. In the above state, the surface levels of the electrolyte that is stored in the separate chambers (not shown) of the battery box 40 that communicate with the first to third lower cells 21 to 23 are less than the heights of the recovery ports 212, 222 , 232, so that no electrolyte leaks from the battery box 40 through the recovery ports 212, 222, 232.
[00160] The interior of the battery box 40 is divided into chambers corresponding to one or more lower cells 21 to 23, 21’ to 23’, respectively. The separate chambers (not shown) of the battery box 40 are configured as independent spaces that are formed by the partition walls (not shown). Here, it is typical to control the amount of electrolyte that is injected into the chambers in a portion of the battery box so that predetermined spaces can be left within the respective separate chambers so that when recovery ports 212, 222, 232 are placed at the upper parts in the areas of the respective cell, the recovery ports 212, 222, 232 are placed at heights above the level surfaces of the electrolyte which is stored in the separate chambers of the battery box 40.
[00161] In other words, the recovery ports 212, 222, 232 of the first to third lower cells 21 to 23 of the battery in the above state are placed at heights greater than the surface levels of the electrolyte that is stored in the separate chambers of the box of battery, so that no electrolyte leaks from the battery box through the recovery ports 212, 222, 232. Also, although the recovery ports 212', 222', 232' of the fourth through sixth cells 21' to 23 ' in the above state are placed in the lower parts, the gas is discharged from the battery box both through the gas discharge holes 29 and through the micro-holes 28, so that a pressure that is intended to discharge the electrolyte from the battery box battery is not generated. Consequently, the amount of electrolyte leaking from the battery box through the lower fourth to sixth cells 21' to 23' is too small, and therefore the leaking electrolyte cannot pass over the first lower extension walls 213', 223', 233'.
[00162] Furthermore, as described above, even when the battery is turned over, the present invention can prevent a leakage of the electrolyte by the upper buffers 114.
[00163] When the battery is turned over from a normal state through an external shock or vibrations, electrolyte leaks from the battery box through the lower recovery ports 212, 222, 232, 212', 222', 232' of the lower cover 20. In the upturned state of the battery, the lower recovery ports 212, 222, 232, 212', 222', 232' of the lower cover 20 are placed facing down so that electrolyte leaks from the battery box through of the cutout hole 212d of the lower recovery ports 212, 222, 232, 212', 222', 232' and fall into areas that are defined by the upper first extension walls 112, the upper second extension walls 117 and the injection ports tops 113, 123, 133, 113', 123', 133' of the top cover 10. However, in the present invention, the top dampers 114 prevent the electrolyte that has fallen into the top cover 10 from moving further. The aforementioned operational function of the battery cover in the flipped state is shown in Figure 14.
[00164] Figure 14 is a plan view illustrating an overturned state of the top cover of the battery cover to prevent leakage of electrolyte in accordance with the present invention.
[00165] As shown in Figure 14, when the battery is turned over into a state in which the top cover 10 and the bottom cover 20 are assembled together, electrolyte leaks from the battery box through the lower recovery ports 212, 222 , 232, 212', 222', 232' of the lower cover 20 and is collected on the lower surface of the overturned upper cover 10. In the above state, the electrolyte that has fallen from the lower recovery ports 212, 222, 232, 212', 222 ', 232' is collected in the areas extending from the first upper extension walls 112 to both the upper injection ports 113, 123, 133, 113', 123', 133' and for the upper buffers 114, and therefore additional movement of the electrolyte from the areas is restricted by the upper buffers 114.
[00166] In the related art, in order to prevent electrolyte leakage from the battery box, plugs are installed in the lower injection ports, respectively. However, related art technologies that use plugs are problematic in that when the battery is turned over, electrolyte can leak from the battery box through gaps around the plugs. Unlike related art technologies, in the present invention, the upper injection ports of the upper cover and the lower injection ports of the lower cover are integrated with each other through welding, thus fundamentally preventing electrolyte leakage through the injection.
[00167] Consequently, in the battery in accordance with the present invention, the upper buffers 114 of the upper cover 10 can effectively restrict a movement of the leaking electrolyte even when the battery is turned over, so that the present invention can minimize the amount of electrolyte leakage.
[00168] As described above, the present invention is advantageous in that the micro-holes 28, the gas discharge holes 29 and the lower recovery ports 212 are formed in areas of the respective cell at a predetermined location and are inclined in directions from the opposite outermost ends of the battery cover to the center of the battery cover, so that the present invention can minimize electrolyte leakage even when the battery tilts to one side or is turned, and can recover easily and effectively a leaking electrolyte.
[00169] Although a preferred embodiment of the present invention has been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible without departing from the scope and spirit of the invention as disclosed in the appended claims.

权利要求:
Claims (16)
[0001]
1. Battery cover for preventing electrolyte leakage comprising a lower cover (20) hermetically seated on an upper end of a battery box (40) which stores an electrolyte therein and a upper cover (10) mounted on one end top of the lower cover (10, 20), wherein the upper cover (10) includes: one or more upper cells (11 to 13, 11' to 13') arranged lengthwise on a lower surface of the upper cover (10 ), an upper inner wall (16) that extends horizontally and vertically at spaced locations, and an upper labyrinth wall (17) that extends vertically in a space between the upper cells and the upper inner wall (16) and connecting the upper cells (11 to 13, 11' to 13') to the upper inner wall (16); the lower cover (20) includes: one or more lower cells disposed lengthwise on an upper surface of the lower cover (20), a lower wall (24) that extends horizontally and vertically at spaced apart locations, and a wall an inferior labyrinth (27) that extends vertically in a space between the inferior cells (21 to 23, 21' to 23') and the inferior wall (24); and the upper labyrinth wall (17) comprises a pair of upper labyrinth walls (172a, 172b) which are separate from each other and thus when the upper cover (10) is mounted on the upper end of the lower cover (20) , the lower labyrinth wall (27) is placed between the pair of upper labyrinth walls (172a, 172b), characterized by the fact that the lower cells (21 to 23, 21' to 23') include: gas (29) communicating with the battery box (40) which stores the electrolyte therein, thereby discharging the gas from the battery box (40); micro-holes (28) communicating with the battery box (40) which stores the electrolyte therein, thereby discharging the gas from the battery box (40); and lower recovery ports (212), each having one or more recovery holes for recovering a leaked electrolyte into the battery box (40).
[0002]
2. Battery cover according to claim 1, characterized in that the top cover (10) includes: an outer wall (14) that protrudes along an edge of the lower surface of the top cover (10) and extending horizontally and vertically so that the outer wall (14) forms an edge along the edge of the lower surface of the top cover (10); gas discharge ports (15) formed through the outer wall (14) from opposite outermost upper cells of the one or more upper cells so as to discharge gas which is discharged from the battery box (40); a guide wall (141) slantingly extending in a vertical direction at a location between the outer wall (14) and the upper inner wall (16); and one or more upper cell separating walls (18) extending vertically from the upper inner wall (16) so as to separate the one or more upper cells from one another.
[0003]
3. Battery cover according to claim 2, characterized in that the upper inner wall (16) comprises: a first upper inner wall (161) extending along the upper ends of the one or more upper cells; second top inner walls (162) extending vertically from opposite ends of the first top inner wall (161) and having respective folded portions (162a) that are folded inwardly at opposite ends of the top cover (10) having the gas discharge ports (15); and a third upper inner wall (163) extending horizontally between ends of the second upper inner walls (162) at a location opposite the first upper inner wall (161), thereby forming lower horizontal walls of the one or more upper cells. .
[0004]
4. Battery cover according to claim 1, characterized in that: when the one or more lower cells are arranged lengthwise, the lower recovery ports (212) are formed on the respective lower cells at a location predetermined and are inclined towards a center of the lower cover (20).
[0005]
5. Battery cover according to claim 4, characterized in that each of the lower recovery ports (212) includes: o one or more recovery holes that are open at the upper ends thereof and formed through a lower surface (212a) of a lower cell associated so as to communicate with the battery box (40); an outer recovery door wall projecting upwardly from the lower surface (212a) through which recovery holes are formed; and one or more cutout holes formed by cutting the outer wall of the recovery port and allowing leaked electrolyte to flow therethrough.
[0006]
6. Battery cover according to claim 1, characterized in that the gas discharge holes (29) are formed in the one or more lower cells arranged lengthwise at predetermined locations and are inclined in cell directions outermost bottoms opposite a center of the bottom cover (20).
[0007]
7. Battery cover according to claim 1, characterized in that the micro-holes (28) are formed in outermost cells opposite the one or more lower cells (21 to 23, 21' to 23').
[0008]
8. Battery cover according to claim 1 or 7, characterized in that the micro-holes (28) are formed in the areas of the lower cells at predetermined locations and are slanted towards a center of the lower cover (20 ).
[0009]
9. Battery cover, according to claim 1, characterized in that the upper cells additionally include: upper dampers (114) that extend horizontally in areas of the upper cells, with the upper dampers (114) functioning as dams to prevent electrolyte movement.
[0010]
10. Battery cover according to claim 1, characterized in that the lower cells, in which the upper cells are placed, include: lower recovery ports (212) that have one or more recovery holes to recover electrolyte leaked into the battery box (40); lower injection ports (211) formed through lower surfaces (212a) of lower cells to inject electrolyte into the battery box (40); horizontally extending bottom horizontal walls such that the bottom horizontal walls are separated from the bottom wall (24); bottom cell separation walls (25) extending vertically to separate neighboring bottom cells from one another; and lower guide walls extending from the outer walls of the lower injection ports (211) to the lower horizontal walls after passing through the lower recovery ports (212) such that the lower guide walls are separated from the cell separation walls lower, so that the lower guide walls form electrolyte passages to guide the leaked electrolyte from the lower recovery ports (212) or lower injection ports (211) to the lower labyrinth wall (27).
[0011]
11. Battery cover according to claim 10, characterized in that the lower cells include: lower first extension walls extending from the outer walls of the lower recovery doors (212) in directions oriented to the lower outermost cells opposites; second lower extension walls extending from the lower cell separation walls to form separate walls from the lower recovery ports (212), thereby defining electrolyte passages to guide the poured electrolyte; and third lower extension walls extending horizontally from the outer walls of the lower injection ports (211) at locations opposite the lower guide walls, thereby forming electrolyte passages between the distal ends thereof and the lower cells near the distal ends.
[0012]
12. Battery cover according to claim 10, characterized in that each of the lower cells is configured so that a height of a first lower surface that forms an electrolyte passage between the lower guide wall and the wall of lower cell separation is greater than a height of a second lower surface on which both the lower recovery port (212) and the lower injection port (211) are formed.
[0013]
13. Battery cover according to claim 12, characterized in that each of the lower cells additionally includes: a sloping surface from the first lower surface to the second lower surface
[0014]
14. Battery cover according to claim 10, characterized in that the upper cells include: upper injection ports (113) welded to the lower injection ports (211) of the lower cells, thereby sealing the ports injection points (211).
[0015]
15. Battery cover according to claim 1, characterized in that the upper cells additionally include: upper dampers (114) that extend horizontally in the areas of the respective upper cells so as to act as dams to restrict a movement of a leaked electrolyte.
[0016]
16. Battery cover according to claim 1, characterized in that the upper cells include: upper horizontal walls (115) that extend horizontally so as to allow the upper labyrinth wall (17) to be connected vertically; upper recovery ports (111) that form walls that protrude from lower surfaces of upper cells, with upper recovery ports (111) sealing upper ends of lower recovery ports (212) that recover a leaked electrolyte from the lower cover to inside the battery box (40); first top extension walls (112) extending slantly from the top recovery doors (111); top guide walls extending vertically from the first ends of the top horizontal walls (115); and upper guide walls which extend vertically from the second ends of the upper horizontal walls (115) and which form passages between the upper guide walls and the upper inner wall (16) which extend in a direction equal to the directions of the walls. -top guides, thereby guiding electrolyte and gas.

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同族专利:

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公开号 | 公开日

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KR101285055B1|2013-07-10|

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BR102013015352A2|2015-03-17|

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EP2738832B1|2016-05-25|

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US20140147733A1|2014-05-29|

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WO2014084437A1|2014-06-05|

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CN103855333B|2016-01-20|

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JP2014107262A|2014-06-09|

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ES2588373T3|2016-11-02|

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CN103855333A|2014-06-11|

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ZA201301816B|2013-11-27|

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EP2738832A1|2014-06-04|

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法律状态:
2015-03-17| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|

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2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2020-06-23| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-07-20| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 18/06/2013, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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KR1020120136977A|KR101285055B1|2012-11-29|2012-11-29|Battery cover for prevention electrolyte leakage|

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KR10-2012-0136977|2012-11-29|

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