Fuel cell bipolar plate and fuel cell comprising same

Abstract

The utility model provides a fuel cell bipolar plate and a fuel cell comprising the same, the fuel cell bipolar plate comprises an anode plate, a cathode plate, a single-side anode sealing strip, a single-side cathode sealing strip and an air inlet, and the air inlet is provided with a single-side sealing area. The fuel cell bipolar plate further comprises a compression compensation assembly; the compression compensation assembly acts on the single-side anode sealing strip or the single-side cathode sealing strip in the single-side sealing area, so that the overall compression amount of the sealing strip in the single-side sealing area reaches the preset compression amount, and sealing is achieved. The fuel cell comprises a proton exchange membrane and further comprises the fuel cell bipolar plates, and the fuel cell bipolar plates are arranged on the two sides of the proton exchange membrane. The arrangement mode of the compression compensation assembly is beneficial to compensation of the compression amount of the sealing strip in the single-side sealing area, so that the sealing performance of the air inlet of the fuel cell bipolar plate is improved, and the service life of the cell is further prolonged.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a fuel cell bipolar plate and a fuel cell containing the same. Background Technology

[0002] A fuel cell is a power generation device that can directly convert the chemical energy of fuel and oxidant into electrical energy. The sealing of a fuel cell relies on the combined action of three structures: the electrode plates, the sealing strips, and the frame. In a fuel cell, most of the sealing areas are sealed by sealing strips on both sides of the membrane electrode frame. However, due to the design of the bipolar plate air intake structure, the air intake is sealed by a sealing strip on only one side.

[0003] like Figure 1 and Figure 2 As shown, the fuel cell bipolar plate 1 includes an anode plate 11, a cathode plate 12, a single-sided anode sealing strip 13, a single-sided cathode sealing strip 14, a double-sided anode sealing strip 19, a double-sided cathode sealing strip 20, and an air inlet 15. A single-sided sealing region is provided at the air inlet 15, which includes either a single-sided anode sealing area formed by the anode plate 11 and the single-sided anode sealing strip 13, or a single-sided cathode sealing area formed by the cathode plate 12 and the single-sided cathode sealing strip 14. The fuel cell bipolar plate 1 also includes a double-sided sealing region disposed at a location other than the air inlet, comprising a double-sided anode sealing region formed by the anode plate 11 and the double-sided anode sealing strip 19, and a double-sided cathode sealing region formed by the cathode plate 12 and the double-sided cathode sealing strip 20. The double-sided anode sealing region and the double-sided cathode sealing region are arranged opposite each other in the height direction of the fuel cell bipolar plate 1.

[0004] In the existing technology, the bipolar plates are at the same height at all positions, and the sealing strips are of equal thickness after compression. Therefore, the compression of the sealing strips at the air inlet will decrease, resulting in a decrease in sealing pressure, which will affect the sealing of the battery. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defect that the compression of the sealing strip is insufficient due to the reliance on only one side sealing at the air inlet of the fuel cell bipolar plate in the prior art, which affects the battery sealing and thus the battery life. The present invention provides a fuel cell bipolar plate and a fuel cell containing the same.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A fuel cell bipolar plate includes an anode plate, a cathode plate, a single-sided anode sealing strip, a single-sided cathode sealing strip, and an air inlet.

[0008] The fuel cell bipolar plate has a single-sided sealing area at the air inlet. The single-sided sealing area includes a single-sided anode sealing area formed by an anode plate and a single-sided anode sealing strip, or a single-sided cathode sealing area formed by a cathode plate and a single-sided cathode sealing strip. The fuel cell bipolar plate also includes a compression compensation component.

[0009] The compression compensation component acts on the single-sided anode sealing strip or single-sided cathode sealing strip of the single-sided sealing area to make the overall compression of the sealing strip of the single-sided sealing area reach the preset compression amount to achieve sealing.

[0010] In this scheme, the compression compensation component is designed to compensate for the compression of the sealing strip in the single-sided sealing area, so that the overall compression of the sealing strip in the single-sided sealing area reaches the preset compression. Under the preset compression, the sealing strip has sufficient sealing capacity, thereby achieving reliable performance at the air inlet, improving the sealing performance at the air inlet of the fuel cell bipolar plate, and thus extending the battery life.

[0011] Preferably, the compression compensation component includes a first height-increasing compensation section;

[0012] The single-sided sealing area is correspondingly set on one side of the anode plate or cathode plate, and the first height compensation part is oppositely set on the other side of the anode plate or cathode plate. In the height direction of the fuel cell bipolar plate, the first height compensation part is opposite to the single-sided anode sealing strip or the single-sided cathode sealing strip.

[0013] In this design, the first height-increasing compensation section is equivalent to increasing the height of the anode plate or cathode plate in the single-sided sealing area, so as to form a sealing pressure with the single-sided anode sealing strip or single-sided cathode sealing strip on the other plate, thereby improving the sealing performance at the air inlet.

[0014] Preferably, the fuel cell bipolar plate further includes a double-sided sealing area disposed at the non-inlet. The double-sided sealing area includes a double-sided anode sealing area formed by an anode plate and double-sided anode sealing strips, and a double-sided cathode sealing area formed by a cathode plate and double-sided cathode sealing strips. The double-sided anode sealing area and the double-sided cathode sealing area are disposed opposite to each other in the height direction of the fuel cell bipolar plate.

[0015] The materials of the single-sided anode sealing strip and the single-sided cathode sealing strip are the same as those of the double-sided anode sealing strip and the double-sided cathode sealing strip;

[0016] In the double-sided sealing area, the double-sided anode sealing strip, after compression, is higher than the protrusion of the anode plate by a first height, and the double-sided cathode sealing strip, after compression, is higher than the protrusion of the cathode plate by a second height.

[0017] Wherein, when the single-sided sealing area is a single-sided cathode sealing area, the first height-increasing compensation part is disposed on the side of the anode plate facing the single-sided cathode sealing strip, and the height of the first height-increasing compensation part protruding from the anode plate is the first height;

[0018] When the single-sided sealing area is a single-sided anode sealing area, the first height-increasing compensation part is disposed on the side of the cathode plate facing the single-sided anode sealing strip, and the height of the first height-increasing compensation part protruding from the cathode plate is the second height.

[0019] In this design, the materials of the single-sided anode sealing strip and the single-sided cathode sealing strip are the same as those of the double-sided anode sealing strip and the double-sided cathode sealing strip. This ensures that the sealing performance of the single-sided and double-sided sealing areas is identical, which is beneficial for maintaining the overall consistency and stability of the fuel cell bipolar plate performance. The height of the first height-increasing compensation part protruding from the anode plate is defined as the first height. After compression, the double-sided cathode sealing strip is higher than the protrusion of the cathode plate by a second height. The height of the first height-increasing compensation part is set by utilizing the parameters of the double-sided sealing area, making the operation simple and reliably achieving the sealing requirements of the single-sided sealing area.

[0020] Preferably, the compression compensation assembly includes a second height compensation section, wherein a single-sided sealing area is correspondingly disposed on one of the anode plate and the cathode plate, the second height compensation section is disposed at one end of the single-sided anode sealing strip or the single-sided cathode sealing strip along the height direction of the fuel cell bipolar plate, and the second height compensation section is disposed opposite to the other of the anode plate and the cathode plate.

[0021] In this design, the addition of a second height-increasing compensation section increases the thickness of the single-sided anode sealing strip or the single-sided cathode sealing strip, thereby strengthening the sealing pressure between the sealing strip and the other electrode plate and improving the sealing performance of the single-sided sealing area.

[0022] Preferably, the fuel cell bipolar plate further includes a double-sided sealing area disposed at the non-inlet. The double-sided sealing area includes a double-sided anode sealing area formed by an anode plate and double-sided anode sealing strips, and a double-sided cathode sealing area formed by a cathode plate and double-sided cathode sealing strips. The double-sided anode sealing area and the double-sided cathode sealing area are disposed opposite to each other in the height direction of the fuel cell bipolar plate.

[0023] The materials of the single-sided anode sealing strip and the single-sided cathode sealing strip are the same as those of the double-sided anode sealing strip and the double-sided cathode sealing strip;

[0024] In the double-sided sealing area, the initial height of the double-sided anode sealing strip is the third height, and the height after compression is the fourth height. The contact pressure between the double-sided anode sealing strip and the anode plate is obtained through the compression curve as the first pressure. The initial height of the double-sided cathode sealing strip is the fifth height, and the height after compression is the sixth height. The contact pressure between the double-sided cathode sealing strip and the cathode plate is obtained through the compression curve as the second pressure.

[0025] When the single-sided sealing area is the single-sided anode sealing area, the second height compensation part is integrally formed with the single-sided anode sealing strip. The height of the single-sided anode sealing strip and the second height compensation part after being compressed is the seventh height. Along the height direction of the bipolar plate of the fuel cell, the initial height of the second height compensation part is configured such that the contact pressure between the single-sided anode sealing strip and the anode plate is the first pressure.

[0026] When the single-sided sealing area is the single-sided cathode sealing area, the second height-increasing compensation part is integrally formed with the single-sided cathode sealing strip. The height of the single-sided cathode sealing strip and the second height-increasing compensation part after being compressed is the eighth height. Along the height direction of the fuel cell bipolar plate, the initial height of the second height-increasing compensation part is configured such that the contact pressure between the single-sided cathode sealing strip and the cathode plate is the second pressure.

[0027] In this solution, the thickness of the single-sided anode or cathode sealing strip in the single-sided sealing area is calculated by using the parameters of the sealing strips in the double-sided sealing area. This solves the problem of poor sealing at the air inlet. This setup is simple and convenient, and helps to shorten the manufacturing cycle of fuel cell bipolar plates. In addition, this setup does not require the addition of new components, which helps to save costs.

[0028] Preferably, the compression compensation assembly includes a sealing compensation element, wherein a single-sided sealing area is correspondingly disposed on one of the anode plate and the cathode plate, and the sealing compensation element is disposed on the other of the anode plate and the cathode plate, and in the height direction of the fuel cell bipolar plate, the sealing compensation element is disposed opposite to the single-sided anode sealing strip or the single-sided cathode sealing strip.

[0029] In this design, the sealing compensation element creates sealing pressure with the sealing strip on the other side to improve the sealing performance of the single-sided sealing area.

[0030] Preferably, the fuel cell bipolar plate further includes a double-sided sealing area disposed at the non-inlet. The double-sided sealing area includes a double-sided anode sealing area formed by an anode plate and double-sided anode sealing strips, and a double-sided cathode sealing area formed by a cathode plate and double-sided cathode sealing strips. The double-sided anode sealing area and the double-sided cathode sealing area are disposed opposite to each other in the height direction of the fuel cell bipolar plate.

[0031] The materials of the single-sided anode sealing strip and the single-sided cathode sealing strip are the same as those of the double-sided anode sealing strip and the double-sided cathode sealing strip;

[0032] In the double-sided sealing area, the initial height of the double-sided anode sealing strip is the third height, and the height after compression is the fourth height. The contact pressure between the double-sided anode sealing strip and the anode plate, obtained through the compression curve, is the first pressure. After compression, the double-sided anode sealing strip is higher than the protrusion of the anode plate by the first height. The initial height of the double-sided cathode sealing strip is the fifth height, and the height after compression is the sixth height. The contact pressure between the double-sided cathode sealing strip and the cathode plate, obtained through the compression curve, is the second pressure. After compression, the double-sided cathode sealing strip is higher than the protrusion of the cathode plate by the second height.

[0033] When the single-sided sealing area is the single-sided anode sealing area, the sealing compensation member is disposed on the side of the cathode plate facing the single-sided anode sealing strip. The height of the sealing compensation member after compression is the second height. The initial height of the sealing compensation member is configured such that the contact pressure between the single-sided anode sealing strip and the anode plate is the first pressure.

[0034] When the single-sided sealing area is the single-sided cathode sealing area, the sealing compensation member is disposed on the side of the anode plate facing the single-sided cathode sealing strip. The height of the sealing compensation member after compression is the first height, and the initial height of the sealing compensation member is configured such that the contact pressure between the single-sided cathode sealing strip and the cathode plate is the second pressure.

[0035] In this solution, by adding a sealing compensation component to the unsealed side of the single-sided sealing area, and by calculating the initial height of the sealing compensation component on the unsealed side of the single-sided sealing area using the parameters of the sealing strip in the double-sided sealing area, the problem of poor sealing at the air inlet can be solved. This setting method is simple and convenient, and helps to shorten the manufacturing cycle of fuel cell bipolar plates.

[0036] Preferably, the materials of the anode plate and the cathode plate are graphite, stainless steel, pure titanium, or titanium alloy;

[0037] And / or, the anode plate and the cathode plate are processed by stamping, hydraulic pressing, molding, machining or etching.

[0038] Preferably, the materials of the anode sealing strip, the cathode sealing strip, and the sealing compensation component are silicone rubber, fluororubber, fluorosilicone rubber, EPDM rubber, or modified rubber.

[0039] And / or, the anode sealing strip, the cathode sealing strip, and the sealing compensation component are processed by molding, injection molding, dispensing, or potting.

[0040] A fuel cell includes a proton exchange membrane and a fuel cell bipolar plate as described above, the fuel cell bipolar plate being disposed on both sides of the proton exchange membrane.

[0041] The positive and progressive effects of this utility model are as follows: the setting method of the compression compensation component is conducive to compensating the compression amount of the sealing strip in the single-sided sealing area, so that the overall compression amount of the sealing strip in the single-sided sealing area reaches the preset compression amount. Under the preset compression amount, the sealing strip has sufficient sealing capacity, thereby achieving reliable performance at the air inlet, improving the sealing performance at the air inlet of the fuel cell bipolar plate, and thus extending the battery life. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the sealing structure of the bipolar plate air inlet of a fuel cell in the prior art.

[0043] Figure 2 This is a cross-sectional view of the sealed air inlet of a fuel cell bipolar plate in the prior art.

[0044] Figure 3 This is a cross-sectional view of the sealed air inlet of the bipolar plate of the fuel cell in Embodiment 1 of this utility model.

[0045] Figure 4 This is a cross-sectional view of the sealed air inlet of the fuel cell bipolar plate in Embodiment 2 of this utility model.

[0046] Figure 5 This is a cross-sectional view of the sealed air inlet of the bipolar plate of the fuel cell in Embodiment 3 of this utility model.

[0047] Explanation of reference numerals in the attached figures:

[0048] Fuel cell bipolar plate 1

[0049] Anode plate 11

[0050] Cathode plate 12

[0051] Single-sided anode sealing strip 13

[0052] Single-sided cathode sealing strip 14

[0053] Air intake 15

[0054] First Height Increase Compensation Department 16

[0055] Second Height Increase Compensation Department 17

[0056] Sealing compensation component 18

[0057] Double-sided anode sealing strip 19

[0058] Double-sided cathode sealing strip 20

[0059] First Height 21

[0060] Second height 22

[0061] Proton exchange membrane 23 Detailed Implementation

[0062] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments thereon.

[0063] Example 1

[0064] like Figure 3 As shown, this embodiment provides a fuel cell bipolar plate 1, which includes an anode plate 11, a cathode plate 12, a single-sided anode sealing strip 13, a single-sided cathode sealing strip 14, and an air inlet 15. The air inlet 15 has a single-sided sealing area, which includes a single-sided anode sealing area formed by the anode plate 11 and the single-sided anode sealing strip 13, or a single-sided cathode sealing area formed by the cathode plate 12 and the single-sided cathode sealing strip 14. The fuel cell bipolar plate 1 also includes a compression compensation component. The compression compensation component acts on the single-sided anode sealing strip 13 or the single-sided cathode sealing strip 14 of the single-sided sealing area to achieve a preset compression amount for sealing.

[0065] In this embodiment, the compression compensation component is configured to compensate for the compression of the sealing strip in the single-sided sealing area, so that the overall compression of the sealing strip in the single-sided sealing area reaches the preset compression amount. Under the preset compression amount, the sealing strip has sufficient sealing capacity, thereby achieving reliable performance at the air inlet 15, improving the sealing performance at the air inlet 15 of the fuel cell bipolar plate 1, and thus extending the battery life.

[0066] It should be noted that the above-mentioned compression compensation components compensate for the overall compression of the sealing strip at the air inlet 15 in different ways. The preset compression amount is the overall compression of the sealing strip in the double-sided sealing area. The above-mentioned sealing strips are all compressed in the corresponding electrode plates.

[0067] refer to Figure 3 To be understood, in a specific embodiment, the compression compensation component includes a first height compensation part 16; wherein, a single-sided sealing area is correspondingly disposed on one side of the anode plate 11 or the cathode plate 12, and the first height compensation part 16 is disposed opposite to the other side of the anode plate 11 or the cathode plate 12. In the height direction of the fuel cell bipolar plate 1, the first height compensation part 16 is disposed opposite to the single-sided anode sealing strip 13 or the single-sided cathode sealing strip 14.

[0068] It should be noted that, as a preferred configuration, the first height compensation part 16 is integrally formed with the corresponding anode plate 11 or cathode plate 12. That is, the first height compensation part 16 is integrally formed with the cathode plate 12 or anode plate 11 and abuts against the proton exchange membrane 23 to form a pressure seal.

[0069] Specifically, when the single-sided sealing area corresponds to the single-sided anode sealing area, the first height compensation part 16 is integrally formed with the cathode plate 12; correspondingly, when the single-sided sealing area corresponds to the single-sided cathode sealing area, the first height compensation part 16 is integrally formed with the anode plate 11.

[0070] In this embodiment, the provision of the first height compensation part 16 is equivalent to increasing the height of the anode plate 11 or cathode plate 12 in the single-sided sealing area, so as to form a sealing pressure with the sealing strip on the other plate, thereby improving the sealing performance at the air inlet 15.

[0071] In other alternative embodiments, the first height compensation part 16 may also be other structural components added to the corresponding anode plate 11 or cathode plate 12.

[0072] refer to Figure 3 It is understood that the fuel cell bipolar plate 1 also includes a double-sided sealing region disposed at the non-inlet 15. The double-sided sealing region includes a double-sided anode sealing area formed by the anode plate 11 and the double-sided anode sealing strip 19, and a double-sided cathode sealing area formed by the cathode plate 12 and the double-sided cathode sealing strip 20. The double-sided anode sealing area and the double-sided cathode sealing area are arranged opposite to each other in the height direction of the fuel cell bipolar plate 1. The materials of the single-sided anode sealing strip 13 and the single-sided cathode sealing strip 14 are the same as the materials of the double-sided anode sealing strip 19 and the double-sided cathode sealing strip 20. In the double-sided sealing region, the double-sided anode sealing strip 19, after compression, is larger than the anode sealing strip 19. The protrusion of plate 11 is higher than the first height 21, and the double-sided cathode sealing strip 20, after compression, is higher than the protrusion of cathode plate 12 by the second height 22. When the single-sided sealing area is a single-sided cathode sealing area, the first height-increasing compensation part 16 is disposed on the side of anode plate 11 facing the single-sided cathode sealing strip 14, and the height of the first height-increasing compensation part 16 protruding from anode plate 11 is the first height 21. When the single-sided sealing area is a single-sided anode sealing area, the first height-increasing compensation part 16 is disposed on the side of cathode plate 12 facing the single-sided anode sealing strip 13, and the height of the first height-increasing compensation part 16 protruding from cathode plate 12 is the second height 22.

[0073] In this embodiment, the materials of the single-sided anode sealing strip 13 and the single-sided cathode sealing strip 14 are the same as those of the double-sided anode sealing strip 19 and the double-sided cathode sealing strip 20, so that the sealing performance of the single-sided sealing area and the double-sided sealing area are the same, which is beneficial to maintaining the consistency and stability of the overall performance of the fuel cell bipolar plate. The height of the first height-increasing compensation part 16 protruding from the anode plate 11 is the first height 21; the double-sided cathode sealing strip 20, after compression, is higher than the protrusion of the cathode plate 12 by a second height 22. By using the parameters of the double-sided sealing area to set the height of the first height-increasing compensation part 16, the operation is simple and can reliably achieve the sealing requirements of the single-sided sealing area.

[0074] It should be noted that when the materials of the single-sided anode sealing strip 13 and the single-sided cathode sealing strip 14 are different from those of the double-sided anode sealing strip 19 and the double-sided cathode sealing strip 20, the height of the first height compensation part 16 protruding from the cathode plate 12 or the anode plate 11 can be calculated based on the compression curve corresponding to the specific material of the sealing strip.

[0075] Furthermore, the materials of the anode plate 11 and the cathode plate 12 include, but are not limited to, graphite, stainless steel, pure titanium, and titanium alloys. The anode plate 11 and the cathode plate 12 are processed by stamping, hydraulic pressing, molding, machining, or etching.

[0076] The materials for anode and cathode sealing strips include, but are not limited to, silicone rubber, fluororubber, fluorosilicone rubber, EPDM rubber, and modified rubber. The processing methods for anode and cathode sealing strips include molding, injection molding, dispensing, or potting.

[0077] This embodiment also provides a fuel cell, including a proton exchange membrane 23. The fuel cell also includes a fuel cell bipolar plate 1 as described above, which is disposed on both sides of the proton exchange membrane 23.

[0078] It should be noted that the proton exchange membrane (PEM) 23 is a special semi-permeable membrane primarily designed for proton conduction, while also acting as an electronic insulator and reactant barrier. It is typically made of high-molecular polymer materials that maintain high proton conductivity and chemical stability under specific chemical conditions. The fundamental function of this membrane in a proton exchange membrane fuel cell (PEMFC) or proton exchange membrane electrolyzer is to separate reactants and transport protons, while preventing direct electron conduction through the membrane. The proton exchange membrane 23 is not only the electrolyte carrier but also the site of the electrochemical reaction between hydrogen and oxygen; its performance directly affects the efficiency and lifespan of the fuel cell. Furthermore, a sealing strip is positioned between the electrode plates and the proton exchange membrane 23.

[0079] Example 2

[0080] The fuel cell bipolar plate and fuel cell provided in this embodiment are basically the same as those in Embodiment 1, with the main difference being the arrangement of the compression compensation component. In this embodiment, the same reference numerals as in Embodiment 1 refer to the same components.

[0081] Specifically, refer to Figure 4As understood, in this embodiment, the compression compensation component includes a second height compensation part 17, wherein a single-sided sealing area is correspondingly disposed in one of the anode plate 11 and the cathode plate 12, and the second height compensation part 17 is disposed at one end of the single-sided anode sealing strip 13 or the single-sided cathode sealing strip 14 along the height direction of the fuel cell bipolar plate 1, and the second height compensation part 17 is disposed opposite to the other of the anode plate 11 and the cathode plate 12.

[0082] In this embodiment, the provision of the second height compensation section 17 increases the thickness of the single-sided anode sealing strip 13 or the single-sided cathode sealing strip 14, thereby strengthening the sealing pressure between the sealing strip and the other electrode plate and improving the sealing performance of the single-sided sealing area.

[0083] It should be noted that after the second height compensation section 17 increases the thickness of the single-sided anode sealing strip 13 or the single-sided cathode sealing strip 14, the proton exchange membrane 23 will deform toward the electrode plate without the sealing strip, so as to increase the sealing pressure between the proton exchange membrane 23 and the electrode plate.

[0084] refer to Figure 4 It is understood that the fuel cell bipolar plate 1 also includes a double-sided sealing region disposed at the non-inlet 15. The double-sided sealing region includes a double-sided anode sealing area formed by the anode plate 11 and the double-sided anode sealing strip 19, and a double-sided cathode sealing area formed by the cathode plate 12 and the double-sided cathode sealing strip 20. The double-sided anode sealing area and the double-sided cathode sealing area are arranged opposite to each other in the height direction of the fuel cell bipolar plate 1. The materials of the single-sided anode sealing strip 13 and the single-sided cathode sealing strip 14 are the same as the materials of the double-sided anode sealing strip 19 and the double-sided cathode sealing strip 20. In the double-sided sealing region, the initial height of the double-sided anode sealing strip 19 is the third height, and the height after compression is the fourth height. The contact pressure between the double-sided anode sealing strip 19 and the anode plate 11 obtained by the compression curve is the first pressure. The initial height of the double-sided cathode sealing strip 20 is the fifth height, and the height after compression is the sixth height. The contact pressure between the double-sided cathode sealing strip 20 and the cathode plate 12 obtained by the compression curve is the second pressure.

[0085] In the case where the single-sided sealing area is a single-sided anode sealing area, the second height-increasing compensation part 17 is integrally formed with the single-sided anode sealing strip 13. The height of the single-sided anode sealing strip 13 and the second height-increasing compensation part 17 after being compressed is the seventh height. Along the height direction of the fuel cell bipolar plate 1, the initial height of the second height-increasing compensation part 17 is configured such that the contact pressure between the single-sided anode sealing strip 13 and the anode plate 11 is the first pressure. Therefore, based on the initial height (third height) and the compressed height (fourth height) of the double-sided anode sealing strip 19, the magnitude of the first contact pressure between the double-sided anode sealing strip 19 and the anode plate 11 can be obtained through the compression curve. On this basis, based on the first pressure and the seventh height (single-sided anode sealing strip 13 and the second height-increasing compensation part 17 after being compressed, combined with the compression curve, the initial overall height of the single-sided anode sealing strip 13 and the second height-increasing compensation part 17 can be obtained. Furthermore, based on the initial height of the single-sided anode sealing strip 13, the initial height of the second height-increasing compensation part 17 can be calculated.

[0086] Accordingly, when the single-sided sealing area is a single-sided cathode sealing area, the second height-increasing compensation part 17 is integrally formed with the single-sided cathode sealing strip 14. The height of the single-sided cathode sealing strip 14 and the second height-increasing compensation part 17 after being compressed is the eighth height. Along the height direction of the fuel cell bipolar plate 1, the initial height of the second height-increasing compensation part 17 is configured such that the contact pressure between the single-sided cathode sealing strip 14 and the cathode plate 12 is the second pressure. Therefore, based on the initial height of the double-sided cathode sealing strip 20 (fifth height) and the compressed height (sixth height), the magnitude of the second contact pressure between the double-sided cathode sealing strip 20 and the cathode plate 12 can be obtained through the compression curve. On this basis, based on the second pressure and the fact that the height of the single-sided cathode sealing strip 14 and the second height-increasing compensation part 17 after being compressed is the eighth height, combined with the compression curve, the initial overall height of the single-sided cathode sealing strip 14 and the second height-increasing compensation part 17 can be obtained. Furthermore, based on the initial height of the single-sided cathode sealing strip 14, the initial height of the second height-increasing compensation part 17 can be calculated.

[0087] In this embodiment, by calculating the thickness of the single-sided anode sealing strip 13 or the single-sided cathode sealing strip 14 in the single-sided sealing area using the parameters of the sealing strips in the double-sided sealing area, the problem of poor sealing at the air inlet 15 can be solved. Furthermore, this arrangement is simple and convenient, which helps to shorten the manufacturing cycle of the fuel cell bipolar plate 1. In addition, this arrangement does not require the addition of new components, saving costs.

[0088] Example 3

[0089] The fuel cell bipolar plate and fuel cell provided in this embodiment are basically the same as those in Embodiments 1 and 2, with the main difference being the arrangement of the compression compensation component. In this embodiment, the same reference numerals as in Embodiments 1 and 2 refer to the same components.

[0090] refer to Figure 5 It is understood that in this embodiment, the compression compensation component includes a sealing compensation member 18, wherein a single-sided sealing area is correspondingly disposed on one of the anode plate 11 and the cathode plate 12, and the sealing compensation member 18 is disposed on the other of the anode plate 11 and the cathode plate 12. In the height direction of the fuel cell bipolar plate 1, the sealing compensation member 18 is disposed opposite to the single-sided anode sealing strip 13 or the single-sided cathode sealing strip 14.

[0091] In this embodiment, the sealing compensation member 18 forms a sealing pressure with the sealing strip on the other side to improve the sealing performance of the single-sided sealing area.

[0092] It should be noted that the pressure exerted by the sealing compensation element 18 and the sealing strip on the proton exchange membrane 23 is reflected in the amount of compression of the sealing compensation element 18 and the sealing strip.

[0093] refer to Figure 5 It is understood that the fuel cell bipolar plate 1 also includes a double-sided sealing area disposed at the non-inlet 15. The double-sided sealing area includes a double-sided anode sealing area formed by the anode plate 11 and the double-sided anode sealing strip 19, and a double-sided cathode sealing area formed by the cathode plate 12 and the double-sided cathode sealing strip 20. The double-sided anode sealing area and the double-sided cathode sealing area are arranged opposite to each other in the height direction of the fuel cell bipolar plate 1. The materials of the single-sided anode sealing strip 13 and the single-sided cathode sealing strip 14 are the same as the materials of the double-sided anode sealing strip 19 and the double-sided cathode sealing strip 20. In the double-sided sealing area, the initial height of the double-sided anode sealing strip 19 is the third height, and the height after compression is the fourth height. The contact pressure between the double-sided anode sealing strip 19 and the anode plate 11 obtained through the compression curve is the first pressure. After compression, the double-sided anode sealing strip 19 is higher than the protrusion of the anode plate 11 by the first height. The initial height of the double-sided cathode sealing strip 20 is the fifth height, and the height after compression is the sixth height. The contact pressure between the double-sided cathode sealing strip 20 and the cathode plate 12 obtained through the compression curve is the second pressure. After compression, the double-sided cathode sealing strip 20 is higher than the protrusion of the cathode plate 12 by the second height.

[0094] When the single-sided sealing area is a single-sided anode sealing area, the sealing compensation member 18 is disposed on the side of the cathode plate 12 facing the single-sided anode sealing strip 13. The height of the sealing compensation member 18 after compression is the second height, and the initial height of the sealing compensation member 18 is configured such that the contact pressure between the single-sided anode sealing strip 13 and the anode plate 11 is the first pressure. Since the double-sided cathode sealing strip 20 is higher than the protrusion of the cathode plate 12 by the second height after compression, the height of the sealing compensation member 18 after compression is also the second height. Based on the first pressure and the compression curve, the initial height of the sealing compensation member 18 can be calculated.

[0095] Accordingly, when the single-sided sealing area is a single-sided cathode sealing area, the sealing compensation member 18 is disposed on the side of the anode plate 11 facing the single-sided cathode sealing strip 14. The height of the sealing compensation member 18 after compression is the first height, and the initial height of the sealing compensation member 18 is configured such that the contact pressure between the single-sided cathode sealing strip 14 and the cathode plate 12 is the second pressure. Since the double-sided anode sealing strip 19 is higher than the protrusion of the anode plate 11 by the first height after compression, the height of the sealing compensation member 18 after compression is also the first height. Based on the second pressure and the compression curve, the initial height of the sealing compensation member 18 can be calculated.

[0096] In this embodiment, by adding a sealing compensation component 18 to the unsealed side of the single-sided sealing area, the initial height of the sealing compensation component 18 to be added to the unsealed side of the single-sided sealing area can be calculated using the parameters of the sealing strip in the double-sided sealing area. This solves the problem of poor sealing at the air inlet 15. This setting method is simple and convenient, and helps to shorten the manufacturing cycle of the fuel cell bipolar plate.

[0097] Furthermore, similar to the anode sealing strip and the cathode sealing strip, the material of the sealing compensation component 18 is also, but is not limited to, one of silicone rubber, fluororubber, fluorosilicone rubber, EPDM rubber and modified rubber, and the processing form of the sealing compensation component 18 is correspondingly molding, injection molding, dispensing or potting.

[0098] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0099] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A fuel cell bipolar plate, the fuel cell bipolar plate comprising an anode plate, a cathode plate, a single-sided anode sealing strip, a single-sided cathode sealing strip, and an air inlet; The air inlet has a single-sided sealing area, which includes a single-sided anode sealing area formed by the anode plate and the single-sided anode sealing strip, or a single-sided cathode sealing area formed by the cathode plate and the single-sided cathode sealing strip, characterized in that... The fuel cell bipolar plate also includes a compression compensation component; The compression compensation component acts on the single-sided anode sealing strip or single-sided cathode sealing strip of the single-sided sealing area to achieve a preset compression amount for the overall compression of the sealing strip in the single-sided sealing area, thereby achieving a seal.

2. The fuel cell bipolar plate as described in claim 1, characterized in that, The compression compensation component includes a first height-increasing compensation unit; The single-sided sealing area is correspondingly disposed on one side of the anode plate or the cathode plate, and the first height compensation part is disposed on the other side of the anode plate or the cathode plate. In the height direction of the fuel cell bipolar plate, the first height compensation part is disposed opposite to the single-sided anode sealing strip or the single-sided cathode sealing strip.

3. The fuel cell bipolar plate as described in claim 2, characterized in that, The fuel cell bipolar plate also includes a double-sided sealing area disposed at the non-inlet. The double-sided sealing area includes a double-sided anode sealing area formed by the anode plate and the double-sided anode sealing strip, and a double-sided cathode sealing area formed by the cathode plate and the double-sided cathode sealing strip. In the height direction of the fuel cell bipolar plate, the double-sided anode sealing area and the double-sided cathode sealing area are disposed opposite to each other. The materials of the single-sided anode sealing strip and the single-sided cathode sealing strip are the same as those of the double-sided anode sealing strip and the double-sided cathode sealing strip. In the double-sided sealing area, the double-sided anode sealing strip, after compression, is higher than the protrusion of the anode plate by a first height, and the double-sided cathode sealing strip, after compression, is higher than the protrusion of the cathode plate by a second height; Wherein, when the single-sided sealing area is the single-sided cathode sealing area, the first height-increasing compensation part is disposed on the side of the anode plate facing the single-sided cathode sealing strip, and the height of the first height-increasing compensation part protruding from the anode plate is the first height; When the single-sided sealing area is the single-sided anode sealing area, the first height-increasing compensation part is disposed on the side of the cathode plate facing the single-sided anode sealing strip, and the height of the first height-increasing compensation part protruding from the cathode plate is the second height.

4. The fuel cell bipolar plate as described in claim 1, characterized in that, The compression compensation assembly includes a second height compensation section, wherein the single-sided sealing area is correspondingly disposed in one of the anode plate and the cathode plate, the second height compensation section is disposed at one end of the single-sided anode sealing strip or the single-sided cathode sealing strip along the height direction of the fuel cell bipolar plate, and the second height compensation section is disposed opposite to the other of the anode plate and the cathode plate.

5. The fuel cell bipolar plate as described in claim 4, characterized in that, The fuel cell bipolar plate also includes a double-sided sealing area disposed at the non-inlet. The double-sided sealing area includes a double-sided anode sealing area formed by the anode plate and the double-sided anode sealing strip, and a double-sided cathode sealing area formed by the cathode plate and the double-sided cathode sealing strip. In the height direction of the fuel cell bipolar plate, the double-sided anode sealing area and the double-sided cathode sealing area are disposed opposite to each other. The materials of the single-sided anode sealing strip and the single-sided cathode sealing strip are the same as those of the double-sided anode sealing strip and the double-sided cathode sealing strip. In the double-sided sealing area, the initial height of the double-sided anode sealing strip is the third height, the height after compression is the fourth height, and the contact pressure between the double-sided anode sealing strip and the anode plate obtained through the compression curve is the first pressure; the initial height of the double-sided cathode sealing strip is the fifth height, the height after compression is the sixth height, and the contact pressure between the double-sided cathode sealing strip and the cathode plate obtained through the compression curve is the second pressure. When the single-sided sealing area is the single-sided anode sealing area, the second height compensation part is integrally formed with the single-sided anode sealing strip. The height of the single-sided anode sealing strip and the second height compensation part after being compressed is the seventh height. Along the height direction of the bipolar plate of the fuel cell, the initial height of the second height compensation part is configured such that the contact pressure between the single-sided anode sealing strip and the anode plate is the first pressure. When the single-sided sealing area is the single-sided cathode sealing area, the second height-increasing compensation part is integrally formed with the single-sided cathode sealing strip. The height of the single-sided cathode sealing strip and the second height-increasing compensation part after being compressed is the eighth height. Along the height direction of the fuel cell bipolar plate, the initial height of the second height-increasing compensation part is configured such that the contact pressure between the single-sided cathode sealing strip and the cathode plate is the second pressure.

6. The fuel cell bipolar plate as described in claim 1, characterized in that, The compression compensation assembly includes a sealing compensation component, wherein the single-sided sealing area is correspondingly disposed on one of the anode plate and the cathode plate, and the sealing compensation component is disposed on the other of the anode plate and the cathode plate. In the height direction of the fuel cell bipolar plate, the sealing compensation component is disposed opposite to the single-sided anode sealing strip or the single-sided cathode sealing strip.

7. The fuel cell bipolar plate as described in claim 6, characterized in that, The fuel cell bipolar plate also includes a double-sided sealing area disposed at the non-inlet. The double-sided sealing area includes a double-sided anode sealing area formed by the anode plate and the double-sided anode sealing strip, and a double-sided cathode sealing area formed by the cathode plate and the double-sided cathode sealing strip. In the height direction of the fuel cell bipolar plate, the double-sided anode sealing area and the double-sided cathode sealing area are disposed opposite to each other. The materials of the single-sided anode sealing strip and the single-sided cathode sealing strip are the same as those of the double-sided anode sealing strip and the double-sided cathode sealing strip. In the double-sided sealing area, the initial height of the double-sided anode sealing strip is the third height, and the height after compression is the fourth height. The contact pressure between the double-sided anode sealing strip and the anode plate, obtained through the compression curve, is the first pressure. After compression, the double-sided anode sealing strip is higher than the protrusion of the anode plate by the first height. The initial height of the double-sided cathode sealing strip is the fifth height, and the height after compression is the sixth height. The contact pressure between the double-sided cathode sealing strip and the cathode plate, obtained through the compression curve, is the second pressure. After compression, the double-sided cathode sealing strip is higher than the protrusion of the cathode plate by the second height. When the single-sided sealing area is the single-sided anode sealing area, the sealing compensation member is disposed on the side of the cathode plate facing the single-sided anode sealing strip. The height of the sealing compensation member after compression is the second height. The initial height of the sealing compensation member is configured such that the contact pressure between the single-sided anode sealing strip and the anode plate is the first pressure. When the single-sided sealing area is the single-sided cathode sealing area, the sealing compensation member is disposed on the side of the anode plate facing the single-sided cathode sealing strip. The height of the sealing compensation member after compression is the first height, and the initial height of the sealing compensation member is configured such that the contact pressure between the single-sided cathode sealing strip and the cathode plate is the second pressure.

8. The fuel cell bipolar plate as described in claim 1, characterized in that, The materials of the anode plate and the cathode plate are graphite, stainless steel, pure titanium, or titanium alloy; And / or, the anode plate and the cathode plate are processed by stamping, hydraulic pressing, molding, machining or etching.

9. The fuel cell bipolar plate as described in claim 7, characterized in that, The materials of the anode sealing strip, the cathode sealing strip, and the sealing compensation component are silicone rubber, fluororubber, fluorosilicone rubber, EPDM rubber, or modified rubber; And / or, the anode sealing strip, the cathode sealing strip, and the sealing compensation component are processed by molding, injection molding, dispensing, or potting.

10. A fuel cell comprising a proton exchange membrane, characterized in that, The fuel cell further includes a fuel cell bipolar plate as described in any one of claims 1-9, wherein the fuel cell bipolar plate is disposed on both sides of the proton exchange membrane.

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