• 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:

    公开号:NL2006172A
    申请号:NL2006172
    申请日:2011-02-10
    公开日:2011-08-15
    发明作者:Harald Maus；Birgit Thoben；Gudrun Oehler；Alexander Bluthard；Juergen Oberle；Erhard Hirth
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    P94037NL00
    Title: Fuel cell system
    The invention is directed to a fuel cell system with at least one tubular fuel cell, the fuel cell having an inner electrode and an outer electrode, wherein a reactant can be supplied through a basic body and through an inner space of the fuel cell of the inner electrode and another reactant which can be supplied through an outer space around the fuel cell of the outer electrode, the reactants being electrochemically convertible to the electrodes and thereby generating an electric current, according to the preamble of claim 1.
    State of the art
    With high-temperature fuel cells such as, for example, a SOFC (Solid Oxid Fuel Cell) operating at about 650-1000 ° C, it is particularly difficult to have an electrode space of an anode and an electrode space of a cathode due to the high temperatures of each other to seal, so that an oxidizing agent and a fuel cannot mix.
    US 2008/0118812 A1 shows a bundle of tubular, i.e., tubular, fuel cells formed as SOFC, with the fuel cells open on both sides. The two sides are each arranged in a support plate which all fuel cells have in common and are each sealed there by a sealant such as glass, wax or silver. A disadvantage here is that glass or wax, depending on the high temperatures, becomes brittle and gas permeable over time. Silver, on the other hand, is too expensive. A further disadvantage is that some defective fuel cells cannot be exchanged. Instead, the seals of the entire support plate should be broken and the support plate removed from the defective fuel cell. Alternatively, in the case of a defective fuel cell, all still intact fuel cells that are connected to the defective fuel cell by fusion via the common support plate should also be exchanged.
    Easy interchangeability of a defective fuel cell is particularly necessary if fuel cells are electrically connected in series to increase the electrical voltage. In a series connection, however, a defective fuel cell means that no more current can flow through the series with defective fuel cells, so that through one defective fuel cell the electrical power of the fuel cell system with the electrical power of the entire one with the defective fuel cell in series switched fuel cells. This necessitates a rapid exchange of the defective fuel cell for regenerating the electrical power of the fuel cell.
    Disclosure of the invention
    An object of the invention is to provide a fuel cell system, in which a simple interchangeability of a single defective fuel cell is made possible. In particular, a gasket of the fuel cells with a long service life will also be provided.
    To achieve this goal, a fuel cell system with the features of claim 1, in particular the characterizing part, is proposed. Advantageous developments of the invention are indicated in the dependent claims. In addition, the measures mentioned in the claims and in the description may in each case per se or in combination be essential for the invention.
    According to the invention, it is provided that the fuel cell is fastened to the basic body by means of a form fitting, wherein the fastening means in particular also secures the fuel cell to the basic body by means of force locking, whereby the inner space is sealed against the outer space.
    A tubular fuel cell has a pipe that has several layers. A first, inner electrode is located on an inner side. There is an electrolyte layer over that separating the first electrode from a second, outer electrode and located on an outside of the pipe. A gas diffusion layer and / or an electrical contact layer can be located on both electrodes. One reactant for an electrochemical reaction of the fuel cell, i.e. a fuel or an oxidizing agent, is supplied to one electrode in each case. Advantageously, but not limitingly, an anode of a fuel cell corresponds to the first electrode and a cathode of the fuel cell corresponds to the second electrode, so that a fuel of the anode in an interior space of the fuel cell and an oxidizing agent of the cathode is fed through an outside space. Hydrogen may be used as fuel and oxygen or oxygen-containing air may be provided as the oxidizing agent. The hydrogen can be recovered by an external or internal reforming process. As a supporting, shaping structure of the fuel cell, in particular whether the anode or the electrolyte layer is provided. The fuel cell is arranged on a base body which comprises at least one supply channel for supplying the fuel and comprises at least one discharge channel for discharging the unconverted fuel and the reaction product, for example water. Here, the fuel cell according to the invention is fixed to the base body by means of form-fitting, but not by means of fusion, with an attachment means, wherein the attachment means prevents the fuel cell from tipping over. Because there is no fusion, the fuel cell can be easily separated from the basic body.
    In the fuel cell, mixing of fuel and oxidant must be avoided as much as possible, so that as much fuel as possible is converted electrochemically and the efficiency of the fuel cell system is therefore as high as possible. Moreover, in the case of, for example, a mixing of hydrogen and oxygen, no safety problem may arise due to a popping gas reaction. Therefore, the inner space and the outer space must be reliably sealed relative to each other. If the fuel cell is pressed against the basic body by the fastening means with a sufficiently high force, that is by means of force locking, the inner space of the outer space is simultaneously sealed. Here, the superimposed surfaces of the basic body and the fuel cell can preferably be ground. Alternatively, labyrinth seals can be stamped or respectively worked in, wherein the labyrinths of the labyrinth seals can optionally be filled with a second suitable substance. An increased surface pressure for a releasable seal can hereby be achieved locally, while leak-prone cavities or paths are avoided. The seal is achieved without a fusing or aging-sensitive sealant. The seal according to the invention is therefore essentially maintenance-free.
    The fastening means according to the invention is preferably used with a fuel cell which is closed on a first side and open on an opposite second side, wherein the fuel cell is arranged on the basic body with the second side. As a result, an attachment and possibly the seal on only one side in only one basic body is required. Due to the unilateral fixed bearing of this device, dimensional changes in the fuel cell, which cannot be avoided due to temperature fluctuations, in particular at start-up, have a considerably smaller influence on the seal. In particular, mechanical deformation is thus also avoided, such as can occur with a two-sided pipe-shaped fuel cell integrated in supporting plates. In order to keep the closed second side gas-tight, the supporting structure of the fuel cell can be manufactured, for example, by means of an injection molding process, in particular for ceramic or ceramic composite materials. The fuel cell can be a high-temperature fuel cell, for example an SOFC.
    In order for the fuel cell to be easily detachable from the base body, it can be provided that the fastener is directly detachably attached to the base body, for example screwed. This allows the fastening means to be loosened or loosened, so that the fuel cell can easily be replaced in the event of a defect. The fastening means is preferably screwed into place with the base body, where the temperature is also so low during use of the fuel cell that corrosion of a screw or a temperature-dependent negligence of used materials is effectively prevented. If the electrochemical reaction takes place far enough away from the basic body only in an upper part of the pipe of the fuel cell, then, for example, the fastening means near the fuel cell can be screwed to the basic body. Preferably the screwing takes place at a distance from the fuel cell. The base body is preferably made at least on the surface facing the fuel cell from an electrically insulating, high-temperature-resistant ceramic. In order to avoid a thread in the ceramics of the basic body, a holder can alternatively be provided which indirectly connects the fixing means and the basic body, in particular glue-like. Alternatively, as an alternative to screwing in, the fuel cell can have a material with a higher coefficient of thermal expansion than the fastener and the base body, so that in a high-temperature use condition the fuel cell is pressed in between the fastener and the base body. In this case, the fastener and the basic body can be monolithic.
    It is conceivable that the fuel cell has a flange that rests directly or indirectly on the basic body. The fastening means can be formed as a rod and arranged over the flange, so that the flange lies between the rod and the basic body by means of form-fitting. Furthermore, the fastening means can be pressed against the basic body with a force, for example in that the fastening means and the basic body are screwed together. As a result, the flange is held between the fastener and the basic body by means of a force containment.
    The fuel cell system can have multiple fuel cells. It is possible that a rod only fixes one fuel cell at a time. Preferably, the rod at least two fuel cells attach to each other, in that the rod lies in width and / or in length on the corresponding flanges of the fuel cells. In this case the rod can also be attached to the basic body only at two ends, in particular screwed down. Due to its length, the rod can attach several fuel cells arranged one behind the other. The fuel cells can be arranged in a spatial field. In particular, the fuel cells can be arranged such that they together form a rectangle of at least two rows and two columns, preferably perpendicular to the rows. A rod can fix two columns at the same time, because the rod lies in its width over in each case two adjacent flanges of the two columns and in its length covers all the flanges of the two columns. Each fuel cell is advantageously attached to the base body by the two rods, which are in particular parallel.
    It may be that the flange extends differently far in various directions away from the fuel cell and is, for example, elliptical or rectangular. As a result, the fuel cell can be rotated underneath the fastener, as in the case of a bayonet fitting during installation.
    In the attached state, the flange extends longitudinally below the fastener. When the fuel cell is removed, the form closure with the fastening means is again lifted by means of a rotational movement, so that the fuel cell can be removed from the fuel cell system without the two bars having to be completely detached. This also facilitates the exchange of a single defective fuel cell.
    In an alternative, bayonet-like embodiment, the fastening means can be in the form of a ring, in particular at least partly of ceramic. In this embodiment, recesses are provided in the basic body which are arranged around a single fuel cell. The fuel cell is then placed on the base body and electrically connected. The mechanical attachment follows because the ring which is placed over the fuel cell and engages the recesses of the basic body and can be locked with a rotation. This embodiment makes possible a geometrically simple fuel cell which can be attached to the basic body with the ring by means of form locking and / or force locking.
    It is conceivable that the fastener is electrically conductive. In particular, in the case of a structured rectangular arrangement, it may be provided with the fuel cell that each time a row of fuel cells is electrically connected in series. If a rod is now used as an electrically conductive fastening means in such a way that the rod fixes at least one column and a column is electrically connected directly or indirectly via a contact element to the outer electrode of the fuel cell, the fuel cells of a column are electrically connected. connected in parallel. If a ring is designed as an electrically conductive fastener and is designed in such a way that it is not symmetrical towards the center of the fuel cell, fuel cells can also be electrically connected to each other. The ring can herein be longitudinally formed in the directions of which an electrical contact with adjacent fuel cells, rings and / or electrical contact elements is desired. In the other directions, the ring is of such a small spatial extent that an electrical contact with undesired electrodes, other rings and / or contact elements is omitted. If several rings of a column come into electrical contact one after the other, the fuel cell of a column can also be electrically connected in parallel.
    If in each case one column is electrically connected in parallel by electrically conductive fastening means, in particular always an electrically conductive rod or several electric rings, a structure of electrically conductive connections is formed, which resembles a matrix. If a fuel cell now fails, electrical current can flow past the defective fuel cell through the other rows. The intact fuel cells of the row containing the defective fuel cell can further generate electrical power. The electrical power of the fuel cell system is thus not reduced by the electrical power of the entire row containing the defective fuel cell, but only by the power of the defective fuel cell itself. The same applies in the case that a fuel cell is not sufficiently supplied with fuel and / or oxidizing agent and thus an electrical current through the submerged fuel cell is also largely prevented. Also here, due to the parallel electrical circuitry of the rows, an electric current flow is possible, so that the electrical power of the fuel cell system does not decrease significantly. More than two rows are preferably electrically connected in parallel, so that the electrical power is not overloaded by the failure of one fuel cell, but that the current flow can be distributed over several rows. An electrically conductive fastener according to the invention thus not only has the advantage that simple replacement of some defective fuel cells is possible. Rather, the electrically conductive fastener also offers the advantage that it makes it possible to change a defective fuel cell only at a later time, for example during prescribed, regular maintenance intervals, because the electric parallel of the fuel cell system due to a defective fuel cell due to the electrically parallel circuit slight decrease. An electrical voltage equalization between fuel cells connected in parallel can also prevent premature aging of the fuel cell, which would otherwise arise due to different fuel supplies and therefore different voltages.
    The inflow and backflow of the fuel and / or the oxidizing agent can be selected for the field of fuel cells in various ways. Fuel cells can be grouped into groups in terms of liquid technology and these groups of fuel cells will have a common distributor and / or collector. A uniform distribution of the fuel and / or the oxidizing agent is hereby achieved with a suitable construction. The groups can be arranged in the rows or columns or as islands. An electrical circuit in groups does not necessarily entail a coverage-like liquid-technical circuit.
    In order to make it easy to change a fuel cell, the electrical connection, which connects the fuel cells electrically in series, must also be easy to remove and attach. In this case, a metal contact element can be provided which has an annular first part which connects the inner electrode of a fuel cell directly or indirectly via a contact layer. The first part can herein have strips which can be bent or bent in the direction of the inner electrode. Alternatively, the first part can be designed as a disc spring, which resiliently extends in the direction of the basic body and thus ensures a good seal. A second part is located at the other end of the contact element. The second portion can be in the form of about a semicircle, which serves to connect the outer electrode of the adjacent fuel cell. The semicircle may also have strips that are bent or bent in the direction of the outer electrode.
    In the exchange process, the semicircle can be simply removed by bending the contact element from the fuel cell to be exchanged and then reassembled to a new fuel cell. Alternatively, the second part can also be designed as a disc spring, which has an inner diameter, which in particular corresponds to the outer diameter of the fuel cell, or as a ring with in particular stripping. In these cases, the second portion is reversibly releasably connected to the first portion, so that when the fuel cell is exchanged, the second portion can be detached and removed from the defective fuel cell.
    The fastener can be in electrical contact with a contact element and thereby realize the parallel circuit. In particular, the contact element can be located in a recess of the flange, over which the fixing element extends. This means that there is not only only the flange between the fastening element and the basic body, but also the contact element. By means of the contact element a relatively soft, elastic and thus resilient element is arranged between the fastening means and the basic body, which can absorb forces caused by temperature fluctuations or tolerances caused by manufacture. The contact element can be made from high-temperature solid steel. Alternatively or additionally, several spring elements may be provided. The fastener may include electrically insulated pieces to ensure electrical isolation of the fastener to electrodes and contact elements whose electrical connections to the fastener are not desirable.
    Further measures that improve the invention follow from the following description of the exemplary embodiments of the invention, which are shown schematically in the figures. All the features and / or advantages resulting from the claims, the description or the drawings, including structural details, spatial arrangement and method steps can be essential for the invention both in itself and in various combinations. It is shown: fig. 1 a top view of a part of a fuel cell system according to the invention, fig. 2 a section of two fuel cells along the line I-I of fig.
    Fig. 1, Fig. 3 is a top view of a contact element of Fig. 2, Fig. 4 is a sectional view along the section line AA of Fig. 1, Fig. 5 is a perspective view of a fuel cell with a fastener according to the invention and Fig. 6 is a replacement diagram of fig. 1.
    Elements with the same function and method are provided with the same reference numerals in figures 1 to 6.
    Fig. 1 shows a part of a fuel cell system 10 according to the invention in a top view. The fuel cell system 10 has fifteen tubular fuel cells 20, which are designed as SOFC. The fuel cells 20 are rectangularly divided into three rows 40 with five fuel cells 20 each. This results in five columns 41 arranged perpendicular to rows 40, each with three fuel cells 20.
    The fuel cells 20 are arranged on a common basic body 11. The fuel cells 20 each have one flange 21 which, together with the fuel cells 20, rest on the basic body 11. Six bars 30, 30 "are arranged perpendicular to the rows 40 between the columns 41. The two outer rods 30 "rest because of their length on the flanges 21 of a column 41, so that a rod 30" in each case fixes three fuel cells 20. The inner rods 30 rest in their width on the adjacent fuel cells 20 of two columns 41. Their length again spans the length of a column 41, so that an inner rod 30 in each case fixes six fuel cells 20. The flange 21 of each fuel cell 20 is fixed on two opposite sides, which are shown as left and right in Fig. 1, by one rod 30 or 30 "in each case. As the electrical contact of the fuel cells 20 in a series circuit, a second portion 53 of a contact element 50 is shown which contacts a cathode 24 of the fuel cell 20 (not shown in FIG. 1) over a contact layer 28 (not shown). In FIG. 3 the contact element 50 is discussed. A mounting for the rod 30, 30 'to the basic body 11 is not shown in FIG.
    FIG. 2 shows a cross-section of the basic body 11 with two adjacent fuel cells 20 of a row 40, which are arranged on the basic body 11 according to intersection line II of FIG. 1. The fuel cells 20 each have an inner space 22 into which the fuel flows in to an inner electrode which acts as anode 23, to react electrochemically. The oxidizing agent in an outer space 13 reacts electrochemically with an outer electrode which acts as a cathode 24. The anode 23 and cathode 24 are separated from one another by means of an electrolyte layer 25 of a solid ceramic, for example yttrium-coated zirconium dioxide. The electrolyte layer 25 herein functions as a supporting, shaping structure of the fuel cell 20. The electrolyte layer 25 is formed in the form of a pipe, wherein a first side 26 is closed and a second side 27 of the electrolyte layer 25 and thus the fuel cell 20 is open. The flange 21 is designed as a material unit with the electrolyte layer 25. The electrolyte layer 25 together with the flange 21 are produced by a common injection molding process, whereby the first side 26 and the transition between the electrolyte layer 25 and the flange 21 have no gas-permeable or brittle seams. A CIM method can be used to manufacture the base body 11.
    Both anode 23 and cathode 24 each have a ceramic contact layer 28 of 10 to 100 µm thickness, for example in the form of a grid, which is applied by a screen printing method. This grid can be reinforced as required by galvanic process steps, such as, for example, by a zinc barrier, so that sufficient cross sections are available for the electrical current conduction. The two fuel cells 20 shown in FIG. 2 are electrically connected in series. An electrically conductive metal contact element 50 leads from the anode 23 of the fuel cell 20 shown on the left to the cathode 24 of the fuel cell 20 shown on the right. A top view of the contact element 50 is shown in FIG. A first portion 51 of the contact element 50 contacts the contact layer 28 of the anode 23. The first portion 51 has strips 52 which are bent in the direction of the anode 23 and lie flat against the contact layer 28. A second semicircular portion 53 of the contact element 50 contacts the contact layer 28 of the cathode 24 of the neighboring fuel cell 20. Strips 52 are also present on a second portion 53 which are tilted in the direction of the cathode 24 and are flat on abut the contact layer 28. In order to ensure a good grip and an electrical contact between the second part 53 and the cathode 24, the inner diameter of the second portion 53 is chosen to be slightly smaller than the outer diameter of the cathode 24. Similarly, in Fig. 2 parts of two further contact elements 50: a part of a contact element 50 that electrically connects the cathode 24 of the left-hand fuel cell 20 to an anode 23 of a fuel cell 20 arranged further to the left, and a part of a further contact element 50 that connects the anode 23 of the right-hand fuel cell 20 electrically connects to a cathode 24 of a fuel cell 20 arranged further to the right, not shown. The flange 21 has recesses 29, shown in FIG. 5, into which the contact element 50 is inserted.
    FIG. 2 also shows the basic body 11 with a ceramic insert 14 on which the fuel cells 20 are arranged. A supply channel 12 runs into the basic body 11, which channel a fuel-containing anode liquid stream according to the arrows 31 into the inner space 22 of the fuel cell 20. A ceramic lance 15 is herein provided, which leads the anode liquid flow to the first, upper side 26 of the fuel cell 20. As a result, the anode liquid flow is led from top to bottom to the anode 23, to leave the fuel cell 20 on the second, bottom side 27 and to be discharged through a discharge channel 16 to the fuel cell system 1 according to the arrows 31.
    The flange 21 rests on the ceramic insert 14 on a bearing surface 17.
    The pressure of the contact elements 50 is not enough to seal the bearing surfaces 17 in a gas-tight manner and thereby effectively prevent a diffusion of the fuel into an outer space 13 and / or a diffusion of the oxidizing agent into the inner space 22. Therefore, a rod 30 rests directly or indirectly on the flanges 21 of the two fuel cells shown in FIG.
    The rod 30, as shown in FIG. 4, is connected to the base body 11 and thereby presses the flange 21 gas-tightly onto the base body 11. Between the rod 30 and the base body 11 there is not only the flange 21, but also the contact element 50 which has resilient effect and compensates for mechanical stresses due to temperature influences. In order for the contact element 50 to be located on the entire bearing surface of the rod 30 between the rod 30 and the basic body 11, the contact element 50 has a widening 54. Half of the two rods 30 are shown in FIG. 2, which or on the flange. 21 of the left-hand fuel cell 20 and a flange of a further fuel cell not further shown to the left, or resting on the flange 21 of the right-hand fuel cell 20 and a flange of a further, still further to the right, not shown fuel cell.
    FIG. 4 shows a cross-section of a column 41 along the section line AA in FIG. 1. The rod 30, the flange 21 of the fuel cells 20, the contact elements 50, of the basic body 11 with the supply and discharge channels 12, 16 and the ceramic insert 14 is shown cut-through. At each end, the rod 30 with the basic body 11 is glued to each other by means of one holder 32. Each holder 32 shows at least one screw 33, whereby their torque is used to determine the force with which the rod 30 presses the flange 21 against the basic body 11.
    As shown in FIG. 5, the flange 21 of each fuel cell 20 is formed as an ellipse. In the attached state the ellipse is oriented such that the main axis a of the ellipse is arranged perpendicular to the bars 30, which attach the fuel cell 20 to the base body 11 (not shown) and the minor axis b which is oriented parallel to the bars 30. This makes it easy to exchange a defective fuel cell 20 ". First of all, the screws 33 are partially loosened. However, the complete removal of the holder 32 and the rod 30 is not necessary. It is sufficient to reduce the pressure of the rod 30 on the flange 21 of the defective fuel cell 20 "such that the defective fuel cell 20" is at least partially rotatable. The second portion 53 of the contact element 50, which abuts the contact layer 28 at the cathode 24 of the defective fuel cell 20 ", is deflected away from the defective fuel cell 20". The defective fuel cell 20 'is now rotated by approximately 90 °, so that the main axis a is oriented parallel to the rods 30 and the flange 21 is therefore no longer held under the rod 30 by means of form closure, because now the shorter secondary axis b is in the direction of the bars 30. The defective fuel cell 20 'can now be removed upwards from the base body 11. A new, intact fuel cell 20 can be deployed in that the new fuel cell 20 is initially placed parallel to the main axis a on the basic body and is then rotated 90 ° below the rod 30. The second portion 53 of the contact element 50 is bent towards the cathode 24 of the new fuel cell, so that the strips 52 come into contact with the contact layer 28 of the cathode 24. The screws 33 are then tightened again.
    The bars 30, 30 "in Figures 1, 2, 4 and 5 are electrically conductive. As shown in FIG. 2, the rod 30 contacts the contact element 50 where the contact element 50 in FIG. 2 is arranged over the flange 21. The middle rod 30 in Fig. 2 is electrically isolated from the cathode 24 of the left-hand fuel cell 20. The same rod 30 also contacts the contact elements 50 which are arranged above and below the drawing surface in the other rows in FIG. This results in a parallel circuit of the individual rows, as shown in the replacement diagram in Fig. 6. In the rows 40 the fuel cells 20 are electrically connected in series by the contact elements 50 and in the columns 41 the fuel cells 20 are electrically connected in parallel by the bars 30, 30 ', the right-hand bar 30' of FIG. 1 not having any electrical contact with the fuel cell has 20. If a fuel cell 20 "is now defective or insufficiently provided by the reactants, the current flows past the defective fuel cell 20" according to the arrows 34. The electrical power of the fuel cell system 10 is thereby reduced only by the electrical power of the defective or under-provided fuel cell 20 ', i.e. in the treated example by at most 15ths. The remaining fuel cells 20 of the rows 40, which contain the defective and subsupported fuel cell 20 ', still contribute to the electrical power of the fuel cell system 10. If a parallel circuit is omitted, the electrical power of the fuel cell system, on the other hand, would 10 with only one defective fuel cell 20 'as in the treated example, decrease by a third.
    The invention is not limited to the exemplary embodiment shown here. Many variants are possible and are understood to fall within the scope of the invention as set forth in the following claims.
    权利要求:
    Claims (10)
    [1]
    A fuel cell system (10) with at least one tubular fuel cell (20), the fuel cell (20) having an inner electrode (23) and an outer electrode (24), a reactant passing through a base body (11) and through a inner space (22) of the fuel cell (20) of the inner electrode and another reactant that can be supplied through an outer space (13) around the fuel cell (20) of the outer electrode (24), the reactants being electrochemically connected to the electrodes (23, 24) are convertible and thereby generate an electric current, characterized in that the fuel cell (20) is attached to the base body (11) with an attachment means (30), the attachment means (in particular) 30) fixes the fuel cell (20) to the base body (11) by means of force containment, whereby the inner space (22) is sealed against the outer space (13).
    [2]
    Fuel cell system (10) according to claim 1, characterized in that the fuel cell (20) is closed on a first side (26) and open on an opposite second side (27), the fuel cell (20) having the second side ( 27) is arranged on the basic body (11).
    [3]
    Fuel cell system (10) according to claim 1 or 2, characterized in that a holder (32) is provided, which mechanically cooperates with the fastening means (30), for reversibly releasably securing the fuel cell (20) on the base body (11) , wherein in particular the holder (32) is shaped like an adhesive.
    [4]
    Fuel cell system (10) according to one of the preceding claims, characterized in that the fastening means (30) is formed at least as a rod (30), wherein at least one flange (21) of the fuel cell (20), which is connected to the second side (27) is arranged between the rod (30) and the basic body (11).
    [5]
    Fuel cell system (10) according to one of the preceding claims, characterized in that a plurality of fuel cells (20) are arranged rectangularly to the base body (11), so that the fuel cells (20) are perpendicular both in rows (40) and in columns (41) are arranged on the rows (40), wherein a rod (30) in each case fixes fuel cells (20) with at least one column (41) to the basic body (11).
    [6]
    Fuel cell system (10) according to one of the preceding claims, characterized in that the fastening means (30) is electrically conductive.
    [7]
    Fuel cell system (10) according to claims 5 or 6, characterized in that the fuel cells (20) of a row (40) are electrically connected in series and fuel cells (20) of a column (41) are electrically connected by the fastening means (30) are connected in parallel with each other.
    [8]
    Fuel cell system (10) according to one of the preceding claims, characterized in that the flange (21) with the rod (30) forms a bayonet-like closure.
    [9]
    Fuel cell system (10) according to one of the preceding claims, characterized in that a spring element (50) is arranged between the fastening means (30) and the basic body (11).
    [10]
    Fuel cell system (10) according to one of the preceding claims, characterized in that the spring element (50) is formed as an electrically conductive contact element (50), wherein two fuel cells (20) are electrically connected in series by the contact element (50), in particular a first portion (51) of the contact element (50) is annularly shaped for contacting an inner electrode (23) of a fuel cell (20) and a second portion (53) of the contact element (50), which is particularly semicircular in shape for contacting an outer electrode (24) of an adjacent fuel cell (20).
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    同族专利:
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    法律状态:
    2021-12-22| MM| Lapsed because of non-payment of the annual fee|Effective date: 20210301 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102010001800A|DE102010001800A1|2010-02-11|2010-02-11|The fuel cell system|
    DE102010001800|2010-02-11|
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