• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    It is a contacting device for battery cells assembled into a module, with a base plate (1) which has cell receptacles (2) for the end sections of individual battery cells (3) on one side and contact points (4) on the opposite side, which are connected to electrical connecting conductors ( 5) for the battery cells (3) are described. In order to design such a contacting device in such a way that both electrical and thermal loading of neighboring cells of a gassing battery cell is avoided, it is proposed that the cell receptacles (2) have outgassing valves (6) that are connected to the connecting conductors (5) in a tensile manner, and that a degassing area (7) connects to the degassing valves (6).
    公开号:AT521581A1
    申请号:T50726/2018
    申请日:2018-08-24
    公开日:2020-03-15
    发明作者:Kreisel Philipp；Kreisel Markus；Kreisel Johann
    申请人:Raiffeisenlandesbank Oberoesterreich Ag；
    IPC主号:
    专利说明:

    The invention relates to a contacting device for battery cells assembled into a module, with a base plate which has cell receptacles for the end sections of individual battery cells on one side and contact points on the opposite side which are connected to electrical connection conductors for the battery cells.
    Particularly in connection with battery modules that have a large number of densely packed, interconnected lithium-ion battery cells, the exothermic reactions taking place in the cells lead to increased heat development during module operation. In order to remedy the heat of reaction and to ensure stable operating conditions of the module, various temperature control concepts are known from the prior art to remedy this basic problem. However, due to mechanical damage to the cells or due to isolated cell defects, there is a risk of "thermal runaway" of the battery cells. As a result of a single damaged or defective cell, hot cell gas escaping in an uncontrolled manner can already be sufficient to set in motion a self-reinforcing, heat-producing chain reaction, so that neighboring cells are also subsequently affected by the so-called "thermal runaway". This effect is amplified if the individual cells affected by a chain reaction are also electrically connected to one another, because, for example, the same current flows through the individual battery cells in a series connection. However, this can also result in the difficulty that the intended fuses will not trip in the event of a cell being degassed because the overcurrent or
    / 12 the temperature required for this is not reached, for example in the event of water ingress.
    The invention is therefore based on the object of designing a contacting device of the type described at the outset in such a way that both electrical and thermal stress on neighboring cells of a gassing battery cell is avoided.
    The invention achieves the stated object in that the cell receptacles have outgassing valves which are connected to the connecting conductors in a tensile manner, and in that a degassing area connects to the outgassing valves. As a result of this measure, the degassing of a battery cell arranged in the respective cell receptacle has the result that the excess pressure which forms in the cell receptacle causes the outgassing valve of this cell receptacle to open. However, because the outgassing valve is connected to the connecting conductor for the battery cell in a tensile manner, opening the valve can not only dissipate the build-up of excess pressure, but also separate the electrical connection of the battery cell concerned, regardless of the electrical operating parameters and also independently of the prevailing temperature. For this purpose, the outgassing valve is connected to the connecting conductor in a tensile manner such that opening the outgassing valve results in an electrical separation of the connecting lead. A degassing area for the hot gas is connected to the outgassing valve so that not only is the evolving hot gas discharged, but in any case it is also possible to open the outgassing valve.
    Particularly simple constructive manufacturing conditions result for the outgassing valves if they form covers for the cell receptacles which can be received by the degassing areas. In order to enable a defined triggering behavior, the covers can either be clamped into corresponding recesses in the cell receptacles or glued in place. Alternatively, the covers can also be connected in one piece to the cell receptacles via predetermined breaking points. Regardless of the specific design, such covers also provide protection for the battery cells covered with them, because hot gas flowing past them cannot directly flow against them. To increase this protective effect, the covers can also be made of an insulating or fire-retardant material.
    In this context, a tensile connection with the connection conductors can be achieved by the covers being pushed through by the connection conductors. A tensile connection between the connection conductors and the outgassing valves is basically understood to mean any connection that is suitable for electrically disconnecting the connection conductor when the valve is opened. In its simplest form, this means mechanical tearing off of the connection conductor. For example, a connection conductor can be welded to a pole of a round cell and cover a cell receptacle for this round cell in such a way that when the round cell is outgassed, the cover is released and the weld seam or the connection conductor itself breaks.
    For a response behavior of the outgassing valve, however, the cover does not have to completely close the cell receptacle, but it is sufficient if the cover has a throttle opening through which a contact spring acts as a connecting conductor. Because of the amount of hot gas flowing out, a reliable opening of the outlet valve can be achieved, the pressure which builds up being able to be partially dissipated even before it opens, which overall leads to a safe removal of the developing hot gas.
    In order to allow a simple discharge of a hot gas within a battery module, it is proposed that individual degassing areas are connected to form a degassing channel. As a result, the hot gas can be discharged laterally and thermal interference above or below the outgassing battery cell is largely prevented.
    This effect can be further improved by providing fire protection between the degassing areas and the contact points. In addition to / 12 or as an alternative to fire protection, thermal insulation or separate cooling of the intermediate space can also be provided.
    Because outgassing a battery cell usually also causes it to be mechanically deformed, it is advisable not to enclose the battery cells flush in the cell receptacles of the base plate, but with the appropriate play. In order to enable a defined positioning of the battery cell within the cell receptacle in this case, it is proposed that the base plate on the side opposite the cell receptacles comprise blind holes, the lateral surfaces of which have through openings to the cell receptacles. A filling compound such as, for example, a simple adhesive point can be introduced into these blind holes, which lies against the respective cell wall through the passage openings to the cell receptacles. In this way, the individual battery cells can be aligned with the base plate in a first step and then fixed in their position in a second step by introducing the filling compound.
    The subject matter of the invention is shown in the drawing, for example. Show it
    Fig. 1 is a partially broken plan view of a contacting device according to the invention and
    Fig. 2 shows a section along the line II - II of Fig. 1 with inserted battery cells.
    A contacting device according to the invention comprises a base plate 1, which has cell receptacles 2 on one side for the end sections of individual battery cells 3. On the side of the base plate 1 opposite the cell receptacles 2, contact points 4 are provided, which in the drawing are designed as clamping receptacles for battery cells 3 of a further contacting device (not shown in more detail). However, any other form of electrical connection can also be understood as a contact point 4, in particular also a busbar for the individual battery cells 3.
    / 12
    The battery cells 3 are connected to the contact points 4 via connection conductors 5 which, in the embodiment shown, are designed as spiral contact springs which are connected to the battery cells 3 via a weld seam. In this embodiment, these connecting conductors 5 penetrate outgassing valves 6 designed as covers for the cell receptacles 2. These outgassing valves 6 form a stop for the radially outer spiral passages of the connecting conductors 5 and are thus connected to this in a tensile manner.
    Degassing regions 7 are provided between the cell receptacles 3 and the contact points 4, which form receptacles for the degassing valves 6 designed as covers. The covers themselves are clamped in openings provided for this purpose in the cell receptacles 2 and close off the cell receptacles 2 with respect to the degassing areas 7.
    If one of the battery cells 3 now degasses, an overpressure arises within the affected cell receptacle 2 and the degassing valve 6 opens by lifting the cover into the degassing area 7 in the illustrated case, as is indicated for the leftmost battery cell 3 in FIG. 2 . As a result, the associated connecting conductor 5 is cut and the battery cell 3 loses its electrical contact with the contact point 4. For this purpose, the covers do not have to completely close off the cell receptacles 2, but, as can be seen from FIG.
    To protect subsequent battery cells 3, fire protection 9 is provided between the degassing areas 7 and the contact points 4 and shields the escaping hot gas from the contact points 4. The fact that the individual degassing regions 7 can be connected to form a degassing channel means that the resulting hot gas can be safely discharged within the proposed contacting device without jeopardizing adjacent battery cells 3. These are largely protected by the outgassing valves 6 designed as covers.
    / 12
    Since the battery cells 3 in the cell receptacles 2 are not circumferentially flush with the base plate 1, a battery cell 3 deforming during outgassing does not directly influence the structural integrity of the contacting device according to the invention. In order to be able to spatially fix the battery cells 3 in the plane of the contacting device, it is proposed that the base plate 1 comprise blind holes 10 on the side opposite the cell receptacles 2, the lateral surfaces of which have through openings 11 to the cell receptacles 2. After aligning the battery cells 3 and the base plate 1 with respect to one another, a filling material 12 can be introduced into these blind holes 10, which, in contact with the battery cells 3, defines their position. For this purpose, the filling material 12 can be, for example, a hardening filling compound such as an adhesive or a resin.
    / 12
    Patent attorneys
    Dipl.-Ing. Helmut Hübscher
    Dipl.-Ing. Gerd pretty
    Dipl.-Ing. Karl Winfried Hellmich
    Spittelwiese 4, 4020 Linz
    权利要求:
    Claims (7)
    [1]
    Claims
    1.Contacting device for battery cells assembled into a module, with a base plate (1) which has cell receptacles (2) for the end sections of individual battery cells (3) on one side and contact points (4) on the opposite side, which have electrical connection conductors (5 ) for the battery cells (3), characterized in that the
    Cell receptacles (2) have outgassing valves (6), which are connected to the connecting conductors (5) in a tensile manner, and that each outgassing area (7) connects to the outgassing valves (6).
    [2]
    2. Contacting device according to claim 1, characterized in that the degassing valves (6) from the degassing areas (7) form covers for the cell receptacles (2).
    [3]
    3. Contacting device according to claim 2, characterized in that the covers of the connecting conductors (5) are penetrated tensile.
    [4]
    4. Contacting device according to claim 2 or 3, characterized in that the covers have a throttle opening (8) penetrated by a contact spring as a connecting conductor (5).
    [5]
    5. Contacting device according to one of claims 1 to 4, characterized in that individual degassing areas (7) are connected to form a degassing channel.
    8/12
    [6]
    6. Contacting device according to one of claims 1 to 5, characterized in that fire protection (9) is provided between the degassing areas (7) and the contact points (4).
    [7]
    7. Contacting device according to one of claims 1 to 6, characterized in that the base plate (1) on the side opposite the cell receptacles (2) comprises blind holes (10), the lateral surfaces of which have passage openings (11) to the cell receptacles (2).
    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2020037339A1|2020-02-27|
    EP3841628A1|2021-06-30|
    AT521581B1|2020-07-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0742599A1|1995-05-12|1996-11-13|Sony Corporation|Enclosed-type secondary cell|
    EP2104160A1|2008-03-17|2009-09-23|Samsung SDI Co., Ltd.|Cylindrical secondary battery|
    US20140308550A1|2011-11-11|2014-10-16|Panasonic Corporation|Battery pack|
    JP4411526B2|2004-03-29|2010-02-10|豊田合成株式会社|Connecting member and battery pack|
    CN103733378B|2011-06-13|2016-08-31|江森自控帅福得先进能源动力系统有限责任公司|It is adapted to assist in the device of the fracture of the vent of electrochemical cell|
    JP6220536B2|2013-03-25|2017-10-25|矢崎総業株式会社|Duct holding structure of battery assembly|
    CN104377335B|2013-08-12|2017-07-07|深圳市沃特玛电池有限公司|High capacity lithium ion battery bag|AT523391B1|2020-03-30|2021-08-15|Kreisel Electric Gmbh & Co Kg|Device with a frame which has receptacles for the face end sections of battery cells which are aligned parallel with respect to their longitudinal axis|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50726/2018A|AT521581B1|2018-08-24|2018-08-24|Contacting device for battery cells assembled into a module|ATA50726/2018A| AT521581B1|2018-08-24|2018-08-24|Contacting device for battery cells assembled into a module|
    PCT/AT2019/060196| WO2020037339A1|2018-08-24|2019-06-13|Contacting device for battery cells combined to form a module|
    EP19732875.0A| EP3841628A1|2018-08-24|2019-06-13|Contacting device for battery cells combined to form a module|
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