Fuel cell stack

Abstract

The invention discloses a fuel cell stack, the fuel cell stack comprises compression hardware and a cell row arranged between the compression hardware, the cell row comprises a plurality of membrane electrodes and a plurality of partition plates, the plurality of partition plates are stacked, the membrane electrodes are stacked between the adjacent partition plates, and the membrane electrodes are stacked between the adjacent partition plates. The compression hardware on the two opposite sides of the battery row in the stacking direction accommodates collector plates, and the partition plates located at the ends of the battery row are bonded with the collector plates through bonding layers. According to the fuel battery pack in the embodiment of the invention, the connection strength between the battery rows and the collector plates can be improved, so that the impact resistance of the fuel battery pack can be improved.

Description

Technical Field

[0001] The present invention relates to the field of electrochemical cells, and in particular to a fuel cell group for a fuel cell. Background Art

[0002] Fuel cell stacks convert hydrogen and air into water and electricity to power fuel cell systems and vehicles. Good electrical connections are required between separators and current collectors in fuel cell stacks to reduce performance losses. Fuel cell vehicles traveling on rough roads can cause shocks and vibrations to the fuel cell stack, which can lead to unstable electrical connections. Contact between the battery row and its compression hardware, especially with the current collector, is usually achieved through compression force. Vibrations and shocks to the fuel cell stack in the lateral direction of the compression force can cause sliding between the last separator and the current collector, which can cause performance losses due to increased resistance. Therefore, the impact-slip behavior between the battery row and the current collector is improved. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] Therefore, one object of the present invention is to provide a fuel cell stack, which can improve the connection strength between the battery row and the current collecting plate, thereby improving the impact resistance of the fuel cell stack.

[0005] According to the fuel cell group in an embodiment of the present invention, the fuel cell group includes compression hardware and a battery row arranged between the compression hardware, the battery row includes a plurality of membrane electrodes and a plurality of partitions, a plurality of the partitions are stacked, and the membrane electrodes are stacked between adjacent partitions, the compression hardware on opposite sides of the battery row in the stacking direction accommodates current collecting plates, wherein the partitions located at the ends of the battery row are bonded to the current collecting plates through an adhesive layer.

[0006] According to the fuel cell stack in the embodiment of the present invention, the connection strength between the battery row and the current collecting plate can be improved, thereby improving the impact resistance of the fuel cell stack.

[0007] In addition, the fuel cell stack according to the above embodiment of the present invention may also have the following additional technical features:

[0008] Optionally, a portion of the adhesive layer is a conductive area.

[0009] Optionally, the adhesive layer includes a plurality of first adhesive members, the first adhesive members are stacked between the battery row and the current collecting plate, and there are gaps between the plurality of first adhesive members.

[0010] Optionally, the first adhesive member is configured to be in the shape of a long strip extending along the width direction of the partition at the end of the battery row, and a plurality of the first adhesive members are arranged at intervals along the length direction of the partition at the end of the battery row.

[0011] Optionally, both ends of the first adhesive member extend to both side edges of the partition at the end of the battery row along the width direction respectively, and both ends of the first adhesive member do not extend out of the edge of the partition at the end of the battery row.

[0012] Optionally, a plurality of the first adhesive members are evenly spaced apart in the length direction of the partition at the end of the battery row.

[0013] Optionally, the adhesive layer further includes a second adhesive member, which is stacked between the battery row and the current collecting plate, and is disposed at gaps between the plurality of first adhesive members.

[0014] Optionally, the first adhesive member and the second adhesive member cooperate to cover the entire partition at the end of the battery row and do not exceed the edge of the partition at the end of the battery row.

[0015] Optionally, the second adhesive member is a conductive adhesive structure.

[0016] Optionally, the current collecting plate includes an active area, and the adhesive layer is partially disposed on the active area, or partially disposed on the periphery of the active area.

[0017] Optionally, the first adhesive member is an insulating adhesive structure.

[0018] Optionally, the battery row includes a plurality of membrane electrodes and a plurality of partitions, the plurality of partitions are stacked, and the membrane electrodes are stacked between adjacent partitions, and the partitions located at the ends of the battery row along the stacking direction are stacked with the current collecting plates and bonded by the adhesive layer.

[0019] Optionally, the partition includes an outer frame and a plate body, the plate body is arranged on the inner side of the outer frame, and a reactant port is provided between the plate body and the outer frame.

[0020] Optionally, both ends of the battery row are laminated and connected with the current collecting plate and the compression hardware, and both ends of the battery row are connected to the current collecting plate through the adhesive layer.

[0021] Optionally, the compression hardware comprises an insulating plate body, the insulation is provided with a groove, and the current collecting plate is embedded in the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a fuel cell stack (the middle part omitted) in some embodiments of the present invention.

[0023] Figure 2 yes Figure 1 A partial enlarged view of the embodiment.

[0024] Figure 3 is a cross-sectional view of a fuel cell stack in some embodiments of the present invention.

[0025] Figure 4 are cross-sectional views of fuel cell stacks in other embodiments of the present invention.

[0026] Reference numerals:

[0027] Fuel cell stack 100 , compression hardware 10 , current collecting plate 20 , battery row 30 , membrane electrode 31 , separator 32 , outer frame 321 , plate body 322 , reactant port 323 , adhesive layer 40 , first adhesive member 41 , second adhesive member 42 . DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The present invention provides a fuel cell stack 100 , which can improve the connection strength between the battery row 30 and the current collecting plate 20 , thereby improving the impact resistance of the fuel cell stack 100 .

[0030] like Figures 1 to 4 As shown, according to the fuel cell stack 100 in the embodiment of the present invention, the fuel cell stack 100 includes compression hardware 10 and a battery row 30 disposed between the compression hardware 10, the battery row 30 includes a plurality of membrane electrodes 31 and a plurality of separators 32, the plurality of separators 32 are stacked, and the membrane electrodes 31 are stacked between adjacent separators 32, and the compression hardware 10 at opposite ends of the battery row 30 in the stacking direction accommodates the current collecting plate 20, wherein the separator 32 at the end of the battery row 30 is bonded to the current collecting plate 20 through the bonding layer 40. Therefore, the connection strength between the battery row 30 and the current collecting plate 20 can be improved, thereby improving the impact resistance of the fuel cell stack 100.

[0031] The current collecting plate 20 is used to transmit the energy generated by the fuel cell stack 100 to the outside, so as to realize the energy supply of the external electrical devices. The current collecting plates 20 may include two, and the two ends of the battery row 30 may be respectively stacked and connected with the current collecting plates 20, and the compression hardware 10 may include two, and the compression hardware 10 may be respectively stacked on the current collecting plates 20 at the two ends of the battery row 30, and the compression hardware 10 at the two ends of the battery row 30 may apply compression force along the stacking direction of the fuel cell stack 100. In other words, the battery row 30 may be clamped between the two compression hardware 10, so that the fuel cell stack 100 is stacked and formed, thereby ensuring the airtightness of the fuel cell stack 100, so that the fuel cell stack 100 can operate well.

[0032] During use, the fuel cell stack 100 will be subjected to impact force from the external environment, especially lateral impact force on the fuel cell stack 100, which will cause relative displacement between the collecting plate 20 and the battery array 30, resulting in reduced air tightness of the fuel cell stack 100 and reduced electrical connection stability, thereby causing the fuel cell stack 100 to be unable to operate normally. Therefore, an adhesive layer 40 may be provided between the battery array 30 and the collecting plate 20 to bond the battery array 30 and the collecting plate 20, thereby improving the connection strength between the battery array 30 and the collecting plate 20 and ensuring the normal operation of the fuel cell stack 100.

[0033] In addition, according to actual needs, the adhesive layer 40 can be partially or completely bonded to the collector plate 20 to improve the connection strength between the battery array 30 and the collector plate 20; the adhesive layer 40 can also be set as a conductive structure to improve the impact resistance of the fuel cell group 100 while ensuring the working stability of the fuel cell group 100; the adhesive layer 40 can also be set as an insulating structure, and the adhesive layer 40 can be partially set between the battery array 30 and the collector plate 20, while improving the impact resistance of the fuel cell group 100, the battery array 30 and the collector plate 20 can be conductive through the unbonded area.

[0034] Therefore, according to the fuel cell stack 100 in the embodiment of the present invention, the connection strength between the battery row 30 and the current collecting plate 20 can be improved, thereby improving the impact resistance of the fuel cell stack 100.

[0035] In some embodiments of the present invention, the adhesive layer 40 may include a first part and a second part, the first part may be a conductive area, and the second part may be a non-conductive area. The adhesive layer 40 disposed between the end of the battery row 30 and the current collecting plate 20 can improve the connection strength between the battery row 30 and the current collecting plate 20 while facilitating the transfer of the electric energy generated by the fuel cell to the current collecting plate 20 through the adhesive layer 40, and collecting the current generated by the battery row 30 through the current collecting plate 20 to transfer the current to the circuit.

[0036] It should be noted that there are many ways to arrange the first part and the second part on the partition 32; for example, the first part can be a long strip, and the second part can also be a long strip, and the first part and the second part are alternately arranged in the length direction of the partition 32; for another example, the first part can be circular, and the second part can also be circular, and they are respectively arranged on the partition 32; but this cannot be understood as limiting the scope of protection of the present invention.

[0037] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the adhesive layer 40 may include a plurality of first adhesive members 41, wherein the first adhesive members 41 may be stacked between the battery row 30 and the current collecting plate 20 to strengthen the connection strength between the battery row 30 and the current collecting plate 20 to ensure the normal operation of the fuel cell stack 100.

[0038] In addition, there are gaps between the first adhesive members 41. When the fuel cell stack 100 is running, the electric energy generated by the battery row 30 can be transmitted to the current collecting plate 20 through the gaps between the first adhesive members 41, and can be transmitted to external electrical devices through the current collecting plate 20.

[0039] Of course, the first adhesive members 41 may have various shapes. For example, the first adhesive members 41 may be circular; in another example, the first adhesive members 41 may be rectangular; in another example, the first adhesive members 41 may be long strips. However, this shall not be construed as limiting the scope of protection of the present invention.

[0040] For example, Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the first adhesive 41 may be configured as a long strip extending in the width direction of the partition 32 at the end of the battery row 30, and a plurality of first adhesives 41 may be arranged at intervals along the length direction of the partition 32 at the end of the battery row 30, which may improve the connection strength between the battery row 30 and the current collecting plate 20, thereby improving the impact resistance of the fuel cell stack 100.

[0041] The fuel cell stack 100 is mainly subjected to lateral impact force. In order to improve the impact resistance of the fuel cell stack 100, the first adhesive 41 can be constructed into a long strip shape extending along the width direction of the partition 32 at the end of the battery row 30. In other words, the extension direction of the first adhesive 41 is the same as the direction of the lateral impact force, thereby increasing the structural strength of the fuel cell stack 100 in the impact direction and ensuring that the fuel cell stack 100 can operate well.

[0042] In addition, a plurality of first adhesive members 41 may be arranged at intervals along the length direction of the partition 32 at the end of the battery row 30 so that gaps may be left between the plurality of first adhesive members 41 to facilitate electrical conduction between the current collecting plate 20 and the battery row 30, thereby transmitting the electrical energy of the battery row 30 to the current collecting plate 20, and then to external electrical devices through the current collecting plate 20.

[0043] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the two ends of the first adhesive 41 can extend to both sides of the partition 32 at the end of the battery row 30 along the width direction, so as to increase the connection area between the first adhesive 41 and the collector 20, and increase the connection area between the first adhesive 41 and the battery row 30, thereby improving the connection strength between the collector 20 and the battery row 30, ensuring that the fuel cell stack 100 can operate well; and the two ends of the first adhesive 41 do not extend out of the edge of the partition 32 at the end of the battery row 30. In other words, while increasing the connection area of ​​the first adhesive 41, in order to avoid leakage of the reaction gas in the fuel cell stack 100, the two ends of the first adhesive 41 can be made not to extend out of the edge of the partition 32 at the end of the battery row 30, so as to ensure the sealing performance of the material battery.

[0044] Of course, the first adhesive member 41 may also be disposed on the periphery of the partition plate 32 at the end of the battery row 30 to improve the connection strength between the current collecting plate 20 and the battery row 30 while ensuring the sealing performance of the fuel cell stack 100 .

[0045] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, a plurality of first adhesive members 41 are evenly spaced in the length direction of the partition 32 at the end of the battery row 30. This arrangement ensures the working stability of the fuel cell group 100.

[0046] The fuel cell stack 100 is generally assembled by compression, specifically, by applying compression force to the compression hardware 10 at both ends of the fuel cell stack 100, so that the fuel cell stack 100 is assembled and formed, wherein a plurality of first adhesive members 41 can be evenly spaced in the length direction of the partition 32 at the end of the battery row 30, so that when the fuel cell stack 100 is compressed, the force inside the fuel cell stack 100 is uniform, thereby ensuring the working stability of the fuel cell stack 100. At the same time, the connection strength between the battery row 30 and the current collecting plate 20 can be improved by a plurality of first adhesive members 41, so as to prevent the fuel cell stack 100 from slipping when subjected to a lateral impact force.

[0047] like Figure 4 As shown, in some embodiments of the present invention, the adhesive layer 40 may further include a second adhesive member 42 .

[0048] The second adhesive member 42 may be stacked between the battery row 30 and the current collecting plate 20, and the second adhesive member 42 may be disposed at the gap between the plurality of first adhesive members 41. The second adhesive member 42 may improve the connection strength between the battery row 30 and the current collecting plate 20, thereby ensuring that the fuel cell stack 100 can operate normally.

[0049] Optionally, the first adhesive 41 and the second adhesive 42 can be partially bonded to the current collecting plate 20 to improve the connection strength between the battery row 30 and the current collecting plate 20, thereby improving the impact resistance of the fuel cell group 100. At the same time, the current collecting plate 20 and the battery row 30 can be conductive through the area where the first adhesive 41 and the second adhesive 42 are bonded to ensure the normal operation of the fuel cell group 100.

[0050] Optionally, the first adhesive 41 and the second adhesive 42 can cooperate to cover the partition 32 at the end of the battery row 30, and do not exceed the edge of the partition 32 at the end of the battery row 30. And the second adhesive 42 can be a conductive adhesive structure, and the first adhesive 41 can be an insulating adhesive structure. When the first adhesive 41 and the second adhesive 42 cooperate to cover the partition 32 at the end of the battery row 30, the connection strength between the collector plate 20 and the battery row 30 can be improved, thereby improving the impact resistance of the fuel cell group 100, and during the operation of the fuel cell group 100, the battery row 30 and the collector plate 20 can be conductive through the second adhesive 42, so that the collector plate 20 can collect the electrical energy generated by the fuel cell group 100, and transmit the electrical energy to external electrical devices.

[0051] In addition, the impact, vibration and performance requirements of the fuel cell stack 100 can be met by changing the ratio and arrangement of the first adhesive member 41 and the second adhesive member 42 .

[0052] Of course, according to actual conditions, at least one of the first adhesive 41 and the second adhesive 42 may be a conductive adhesive structure; for example, the first adhesive 41 may be a conductive adhesive structure, and the second adhesive 42 may be an insulating adhesive structure; for another example, the first adhesive 41 may be a conductive adhesive structure, and the second adhesive 42 may also be a conductive adhesive structure, so as to ensure the normal operation of the fuel cell group 100 while ensuring the connection strength between the battery row 30 and the collecting plate 20, but this cannot be understood as limiting the scope of protection of the present invention.

[0053] In some embodiments of the present invention, the partition 32 includes an active area, and the adhesive layer 40 is partially disposed on the active area, or partially disposed on the periphery of the active area to improve the connection strength between the battery row 30 and the collecting plate 20, thereby improving the impact resistance of the fuel cell stack 100.

[0054] The separator 32 may include an active area and a passive area; specifically, the active area refers to the area on the separator 32 that is directly related to the electrochemical reaction. Through the active area on the separator 32, the fuel cell can generate electrical energy and collect and distribute the current through the current collector 20. The passive area refers to the area of ​​the separator 32 that is not related to the electrochemical reaction. The passive area mainly includes non-conductive materials, such as polymer membranes or ceramic membranes, to ensure the separation of reactions and safe operation.

[0055] In combination with the above-mentioned embodiment, the adhesive layer 40 may include a first adhesive member 41 and a second adhesive member 42. The first adhesive member 41 may be disposed on the passive region on the partition 32, and the second adhesive member 42 may be disposed on the active region on the partition 32, so as to ensure the conductive efficiency of the fuel cell stack 100 while improving the connection strength between the current collecting plate 20 and the battery row. Of course, according to actual conditions, the first adhesive member 41 may be partially disposed on the active region and the passive region, and the second adhesive member 42 may be partially disposed on the active region and the passive region, respectively, which is not a limitation on the protection scope of the present invention.

[0056] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the battery row 30 may include a plurality of membrane electrodes 31 and a plurality of separators 32 .

[0057] Among them, a plurality of separators 32 are stacked, and the membrane electrode 31 is stacked between adjacent separators 32, and the separator 32 located at the end of the battery row 30 along the stacking direction is stacked with the current collecting plate 20 and bonded by the bonding layer 40. Therefore, the connection strength between the separator 32 at the end of the battery row 30 and the current collecting plate 20 can be improved to enhance the impact resistance of the fuel cell stack 100.

[0058] In addition, one of the adjacent separators 32 may be an anode separator, and the other may be a cathode separator. During the reaction of the fuel cell stack 100, the anode separator may react to produce protons, and the protons may pass through the membrane electrode 31 between the adjacent separators 32, move to the cathode separator, and react at the cathode separator to form water, etc.

[0059] like Figures 1 to 4 As shown, in some embodiments of the present invention, the partition 32 may include an outer frame 321 and a plate body 322 .

[0060] The plate 322 is disposed inside the outer frame 321, and a reactant port 323 may be disposed between the plate 322 and the outer frame 321. Therefore, a reactant flow channel may be constructed in the fuel cell stack 100 through the reactant port 323, so that the fuel cell stack 100 generates electricity.

[0061] Specifically, a plurality of reactant ports 323 may be provided between the plate body 322 and the outer frame 321. When a plurality of partitions 32, a plurality of membrane electrodes 31, a plurality of current collecting plates 20, and a plurality of compression hardware 10 are stacked and compressed into a fuel cell stack 100, the plurality of reactant ports 323 may form reactant flow channels within the fuel cell stack 100, so that a plurality of reactant manifolds are sealedly connected to a plurality of reactant flow channels of the fuel cell stack 100, thereby supplying reactants into the reactant flow channels and realizing power generation of the fuel cell stack 100.

[0062] In addition, the reactant flow channel can be used for the input of hydrogen or a hydrogen-containing mixture, oxygen or an oxygen-containing mixture, and cooling water, and can also be used for the output of products, cooling water, etc. of the fuel cell stack 100. In some specific examples, the reactant flow channel may include a fuel flow channel, a coolant flow channel, and an air flow channel. When the fuel cell stack 100 is working, hydrogen, air, and coolant can enter the active area in the plate body 322 through the reactant flow channel.

[0063] In addition, the plate body 322 has an active area, and the adhesive layer 40 can be partially bonded in the active area, and the adhesive layer 40 can also be partially bonded to the edge of the active area, so as to achieve the purpose of improving the impact resistance of the fuel cell stack 100.

[0064] like Figure 1 As shown, in some embodiments of the present invention, both ends of the battery row 30 may be laminated and connected with the current collecting plate 20 and the compression hardware 10, and both ends of the battery row 30 may be connected to the current collecting plate 20 through the adhesive layer 40. Therefore, the connection strength between the battery row 30 and the current collecting plate 20 can be improved, so that the impact resistance of the fuel cell stack 100 can be improved.

[0065] Specifically, current collecting plates 20 may be stacked at both ends of the battery row 30 to collect the electric energy generated by the fuel cell stack 100, and both ends of the battery row 30 may be connected to the current collecting plates 20 via an adhesive layer 40, which may improve the connection strength between the battery row 30 and the current collecting plates 20, so as to improve the impact resistance of the fuel cell stack 100. In addition, compression hardware 10 may be stacked at both ends of the battery row 30, and compression force may be applied to the fuel cell stack 100 through the compression hardware 10, so that the fuel cell stack 100 is compressed and assembled into shape, thereby ensuring the sealing performance of the fuel cell stack 100.

[0066] Secondly, according to actual needs, the adhesive layer 40 can also be set at one end of the battery array 30. In other words, one end of the battery array 30 can be connected to the current collecting plate 20 through the adhesive layer 40, and the other end of the battery array 30 is pressed against the current collecting plate 20.

[0067] like Figure 1As shown, in some embodiments of the present invention, the compression hardware 10 may include an insulating plate body, and the insulating plate body may be provided with a groove, and the current collecting plate 20 is embedded in the groove, which can improve the connection strength between the current collecting plate 20 and the compression hardware 10, and at the same time, it can prevent the compression hardware 10 and the current collecting plate 20 from relative displacement when the fuel cell stack 100 is subjected to a lateral impact force. And through the insulating plate body in the compression hardware 10, the short circuit phenomenon of the fuel cell stack 100 can be avoided, and the safety is improved.

[0068] In addition, in order to improve the sealing performance of the fuel cell stack 100, a groove may be provided on the partition 32 and / or the current collecting plate 20 so that the adhesive layer 40 can be provided in the groove. In other words, when the partition 32 and the current collecting plate 20 are connected through the adhesive layer 40, the adhesive layer 40 may be provided in the groove to reduce the gap between the partition 32 and the current collecting plate 20, thereby improving the sealing performance of the fuel cell stack 100 and ensuring that the fuel cell stack 100 can operate well.

[0069] According to the vehicle in the embodiment of the present invention, the vehicle includes the fuel cell stack 100 in the above embodiment. By applying the above fuel cell stack 100, the connection strength between the battery row 30 and the current collecting plate 20 can be improved, thereby improving the impact resistance of the fuel cell stack 100. In addition, it can also prevent the fuel cell stack 100 from being impacted and causing the vehicle to stop due to performance loss.

[0070] In practice, when the fuel cell stack 100 is subjected to a lateral impact force, relative sliding may occur between the battery row 30 and the current collecting plate 20, resulting in partial performance loss of the fuel cell stack 100. As the impact increases, the fuel cell stack 100 may lose all performance, and then cause the vehicle to stop. Therefore, an adhesive layer 40 may be provided between the battery row 30 and the current collecting plate 20. The adhesive layer 40 may increase the connection strength between the battery row 30 and the current collecting plate 20, thereby increasing the impact resistance of the fuel cell stack 100.

[0071] In addition, the adhesive layer 40 stacked between the battery row 30 and the current collecting plate 20 may include a first adhesive 41 and a second adhesive 42. The first adhesive 41 may be in the shape of a long strip extending along the width direction of the current collecting plate 20, and multiple first adhesives 41 may be evenly spaced along the length direction of the current collecting plate 20, while multiple second adhesives 42 may be arranged in the gaps between the multiple first adhesives 41. In other words, the extension direction of the first adhesive 41 and the second adhesive 42 may be the same as the direction of the external impact force to improve the impact resistance of the fuel cell group 100 in the impact direction.

[0072] Secondly, the adhesive layer 40 can be partially arranged or spread over the current collecting plate 20 to improve the impact resistance of the fuel cell group 100; for example, when the adhesive layer 40 is partially arranged on the current collecting plate 20, the connection strength between the current collecting plate 20 and the battery row 30 can be improved, and at the same time, the current collecting plate 20 and the battery row 30 can be conductive through the area where the adhesive layer 40 is not arranged, so as to realize the collection of electrical energy of the fuel cell group 100 by the current collecting plate 20; for another example, when the adhesive layer 40 spreads over the current collecting plate 20, the second adhesive member 42 can be a conductive adhesive structure, and the first adhesive member 41 can be an insulating adhesive structure, so that while improving the connection strength between the current collecting plate 20 and the battery row 30, the current collecting plate 20 can collect electrical energy of the fuel cell group 100 through the second adhesive member 42.

[0073] In the present invention, an adhesive layer 40 may be added between the battery row 30 and the current collecting plate 20 to improve the connection strength between the battery row 30 and the current collecting plate 20 .

[0074] In some specific examples of the present invention, the non-conductive adhesive layer (i.e., the first adhesive member 41) partially covers the contact area between the separator 32 and the current collecting plate 20. Through the partial coverage of the adhesive layer 40, the current collecting plate 20 and the separator 32 can be electrically connected in the uncovered area.

[0075] In some specific examples of the present invention, the adhesive layer 40 may be partially placed on the active area or the perimeter of the active area. In addition, the optimal ratio between the adhesive layer 40 and the uncovered area and the position of the adhesive strip may be changed and optimized according to the impact, vibration and performance requirements of the fuel cell stack 100, thereby improving the impact resistance of the fuel cell stack 100.

[0076] In some specific examples of the present invention, grooves may be added to the separator 32 and / or the current collecting plate 20 to make the grooves consistent with the thickness of the adhesive layer 40 , so as to perform electrical and mechanical connections around the adhesive layer 40 .

[0077] In some specific examples of the present invention, conductive glue (i.e., the second adhesive 42) or a mixture of conductive glue (i.e., the second adhesive 42) and non-conductive glue (i.e., the first adhesive 41) can be used to improve the connection between the partition 32 and the current collecting plate 20.

[0078] In some specific examples of the present invention, the connection strength and electrical connection can be optimized by changing the ratio of the conductive adhesive (ie, the second adhesive member 42 ) and the non-conductive adhesive (ie, the first adhesive member 41 ).

[0079] In some specific examples of the present invention, a recessed area having a thickness of the adhesive layer 40 may be added in the separator 32 and / or the current collecting plate 20 .

[0080] The present invention improves contact during impact vibration by adding an adhesive layer 40 between the separator 32 and the current collector 20. The connection area is partially covered with a non-conductive adhesive layer (i.e., the first adhesive 41) to use the uncovered area for conduction between the current collector 20 and the separator 32. The separator 32 and the current collector 20 are connected using a conductive adhesive (i.e., the second adhesive 42), and the conductive adhesive (i.e., the second adhesive 42) can completely or partially cover the connection area. A combination of a conductive adhesive (i.e., the second adhesive 42) and a non-conductive adhesive (i.e., the first adhesive 41) that completely or partially covers the connection area is used. A groove is added in the separator 32 or the current collector 20 or a combination of the two to achieve a flush connection.

[0081] The advantage of the present invention is that the connection strength between the current collecting plate 20 and the separator 32 is improved, thereby improving the impact resistance of the fuel cell stack 100 .

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fuel cell stack, characterized in that: The invention comprises compression hardware (10) and a battery row (30) arranged between the compression hardware (10), wherein the battery row (30) comprises a plurality of membrane electrodes (31) and a plurality of separators (32), wherein the plurality of separators (32) are stacked, and the membrane electrodes (31) are stacked between adjacent separators (32), and the compression hardware (10) at opposite ends of the battery row (30) in the stacking direction accommodates current collecting plates (20), wherein the separators (32) located at the ends of the battery row (30) are bonded to the current collecting plates (20) via bonding layers (40).

2. The fuel cell stack according to claim 1, characterized in that: A portion of the adhesive layer (40) is a conductive area.

3. The fuel cell stack according to claim 1, characterized in that: The adhesive layer (40) comprises a plurality of first adhesive members (41), wherein the first adhesive members (41) are stacked between the battery row (30) and the current collecting plate (20), and gaps are provided between the plurality of first adhesive members (41).

4. The fuel cell stack according to claim 3, characterized in that: The first adhesive member (41) is configured to be in the shape of a long strip extending along the width direction of the partition (32) at the end of the battery row (30), and a plurality of the first adhesive members (41) are arranged at intervals along the length direction of the partition (32) at the end of the battery row (30).

5. The fuel cell stack according to claim 4, characterized in that: The two ends of the first adhesive member (41) respectively extend to two sides of the partition (32) at the end of the battery row (30) along the width direction, and the two ends of the first adhesive member (41) do not extend beyond the edge of the partition (32) at the end of the battery row (30); And / or, a plurality of the first adhesive members (41) are evenly spaced in the length direction of the partition (32) at the end of the battery row (30).

6. The fuel cell stack according to claim 3, characterized in that: The adhesive layer (40) further comprises a second adhesive member (42), the second adhesive member (42) being stacked between the battery row (30) and the current collecting plate (20), and the second adhesive member (42) being arranged at the gaps between the plurality of the first adhesive members (41).

7. The fuel cell stack according to claim 6, characterized in that: The first adhesive member (41) and the second adhesive member (42) cooperate to cover the partition (32) at the end of the battery row (30) and do not exceed the edge of the partition (32) at the end of the battery row (30); And / or, the second adhesive member (42) is a conductive adhesive structure.

8. The fuel cell stack according to claim 1, characterized in that: The partition (32) includes an active area, and the adhesive layer (40) is partially disposed on the active area or partially disposed on the periphery of the active area.

9. The fuel cell stack according to any one of claims 3 to 7, characterized in that: The first adhesive member (41) is an insulating adhesive structure.

10. The fuel cell stack according to any one of claims 1 to 8, characterized in that: The battery row (30) comprises a plurality of membrane electrodes (31) and a plurality of separators (32), wherein the plurality of separators (32) are stacked, and the membrane electrodes (31) are stacked between adjacent separators (32), and the separators (32) located at the ends of the battery row (30) along the stacking direction are stacked with the current collecting plates (20) and bonded via the bonding layer (40).

11. The fuel cell stack according to claim 10, characterized in that: The partition (32) comprises an outer frame (321) and a plate body (322), wherein the plate body (322) is arranged on the inner side of the outer frame (321), and a reactant port (323) is arranged between the plate body (322) and the outer frame (321).

12. The fuel cell stack according to any one of claims 1 to 8, characterized in that: Both ends of the battery row (30) are stacked and connected with the current collecting plate (20) and the compression hardware (10), and both ends of the battery row (30) are connected to the current collecting plate (20) via the adhesive layer (40); And / or, the compression hardware (10) comprises an insulating plate body, the insulating plate body is provided with a groove, and the current collecting plate (20) is embedded in the groove.

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