Polar plate, fuel cell system and automobile

Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a polar plate, a fuel cell system and an automobile, the polar plate comprises an anode plate and a cathode plate, and the front surface of the anode plate is provided with a hydrogen reaction zone; an air reaction area and an air distribution area are arranged on the front surface of the cathode plate, and a first sealing groove is formed around the air reaction area and the air distribution area; the air distribution areas are arranged on the two opposite sides of the air reaction area, a cooling area and cooling liquid distribution areas are arranged on the back face of the negative plate, the cooling liquid distribution areas are arranged on the two opposite sides of the cooling area, and at least the cooling liquid distribution area on one side of the cooling area is provided with a supporting structure. The first sealing groove is used for supporting a polar plate area where the first sealing groove is located. The supporting structure is used for supporting part of the polar plate area where the first sealing groove is located, so that the sealing gasket in the first sealing groove is prevented from extruding the anode plate and the cathode plate to cause untight sealing of cathode and anode gas paths, and the gas tightness and performance of the stack are improved.

Description

Technical Field

[0001] This application belongs to the technical field of fuel cells, and particularly relates to a bipolar plate, a fuel cell system, and an automobile. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen into electrical energy. Hydrogen fuel cells have the advantages of being environmentally friendly, operating quietly, and having high power generation efficiency, and have broad application prospects.

[0003] A hydrogen fuel cell mainly consists of a fuel cell stack, a fuel supply system, an air supply system, etc. The bipolar plate is a core component of the fuel cell stack, and its functions include providing a gas flow field, supporting the membrane electrode, conducting current, etc.

[0004] The bipolar plate includes an anode plate and a cathode plate. The front surface of the cathode plate is provided with an air reaction area, an air distribution area, an air inlet, and an air outlet. The front surface of the cathode plate is also provided with a sealing groove, and a sealing strip is installed in the sealing groove to surround and seal the air reaction area, the air distribution area, the air inlet, and the air outlet. For the existing bipolar plate, there is a problem that the gas path of the cathode plate is not tightly sealed, which affects the airtightness and performance of the stack. Summary of the Invention

[0005] The purpose of this application is to provide a bipolar plate, a fuel cell system, and an automobile to improve the problem of the loose airtightness of the gas path of the cathode plate and improve the airtightness and performance of the stack.

[0006] To achieve the above purpose, this application provides a bipolar plate, including:

[0007] An anode plate having opposite front and back surfaces, and a hydrogen reaction area is provided on the front surface of the anode plate;

[0008] A cathode plate having opposite front and back surfaces, the front surface of the cathode plate is disposed opposite to the front surface of the anode plate, an air reaction area and an air distribution area are provided on the front surface of the cathode plate, and a first sealing groove is provided around the air reaction area and the air distribution area; the air distribution area is disposed on opposite sides of the air reaction area, a cooling area and a coolant distribution area are provided on the back surface of the cathode plate, the coolant distribution area is disposed on opposite sides of the cooling area, and a support structure is provided on at least one side of the coolant distribution area of the cooling area, and the support structure is used to support a part of the bipolar plate area where the first sealing groove is located.

[0009] Optionally, the support structure is provided on both sides of the coolant distribution area of the cooling area.

[0010] Optionally, a coolant inlet and a coolant outlet are respectively arranged at two ends of the cathode plate. The coolant inlet and the coolant outlet are both communicated with the front and back surfaces of the cathode plate. The coolant inlet and the coolant outlet are both communicated with the cooling area through the coolant distribution area. The support structure is arranged on one side of the coolant distribution area close to the coolant inlet and on one side of the coolant distribution area close to the coolant outlet.

[0011] Optionally, the support structure includes a plurality of support columns arranged at intervals.

[0012] Optionally, a coolant inlet and a coolant outlet are respectively arranged at two ends of the cathode plate. The coolant inlet and the coolant outlet are both communicated with the front and back surfaces of the cathode plate. The coolant inlet and the coolant outlet are both communicated with the cooling area through the coolant distribution area. A plurality of guide columns arranged at intervals are further arranged in the coolant distribution area. The guide columns include cylinders. The column surface of the guide columns distributes the coolant at the coolant inlet to different cooling channels in the cooling area or converges the coolant in different cooling channels to the coolant outlet.

[0013] Optionally, the support columns are part of the guide columns located in the plate region.

[0014] Optionally, a sinking area is arranged at the periphery of at least one of the hydrogen reaction area and the air reaction area. The sinking area is used to accommodate the overlapping area of the border film and the gas diffusion layer of the membrane electrode.

[0015] Optionally, sinking areas are arranged at the peripheries of both the hydrogen reaction area and the air reaction area. Among them, the sinking area at the periphery of the hydrogen reaction area is the first sinking area, and the sinking area at the periphery of the air reaction area is the second sinking area.

[0016] Optionally, a hydrogen distribution area is arranged on the front surface of the anode plate. The hydrogen distribution area is located on two opposite sides of the hydrogen reaction area. A first sinking area is arranged at the periphery of the hydrogen reaction area. The first sinking area penetrates through the hydrogen distribution area. A second sinking area is arranged at the periphery of the air reaction area. The second sinking area penetrates through the air distribution area.

[0017] Optionally, an air inlet and an air outlet are respectively arranged at two ends of the cathode plate. The air inlet and the air outlet are both communicated with the front and back surfaces of the cathode plate. The air inlet and the air outlet are both communicated with the air reaction area through the air distribution area. The air distribution area includes a plurality of first ridges arranged at intervals. At least part of the first ridges extend to the air inlet and the air outlet.

[0018] Optionally, a hydrogen distribution area is provided on the front surface of the anode plate. The hydrogen distribution area is located on opposite sides of the hydrogen reaction area. A hydrogen inlet and a hydrogen outlet are respectively provided at both ends of the anode plate. Both the hydrogen inlet and the hydrogen outlet communicate the front and back surfaces of the anode plate, and both the hydrogen inlet and the hydrogen outlet are communicated with the hydrogen reaction area through the hydrogen distribution area. The hydrogen distribution area includes a plurality of second ridges arranged at intervals, and at least a part of the second ridges extends to the hydrogen inlet and the hydrogen outlet.

[0019] Optionally, the distance between adjacent first ridges at the air inlet and the air outlet is 2 mm to 3 mm, and the distance between adjacent second ridges at the hydrogen inlet and the hydrogen outlet is 2 mm to 3 mm.

[0020] The present application further provides a fuel cell system, including a fuel cell stack. The fuel cell stack includes the electrode plates, a first end plate, a second end plate, and a membrane electrode. The membrane electrode is disposed between the first end plate and the second end plate. The anode plate is disposed between the first end plate and the membrane electrode, and the cathode plate is disposed between the membrane electrode and the second end plate.

[0021] Optionally, the membrane electrode includes a proton exchange membrane and gas diffusion layers. The gas diffusion layers are disposed on both sides of the proton exchange membrane, and the compression amount of the gas diffusion layers is 15% to 25%.

[0022] The present application further provides an automobile, including:

[0023] A power system;

[0024] The fuel cell system, and the fuel cell system is connected to the power system.

[0025] The electrode plates, fuel cell system, and automobile disclosed in the present application have the following beneficial effects:

[0026] In the present application, the electrode plates include an anode plate and a cathode plate. The front surface of the cathode plate is disposed opposite to the front surface of the anode plate. An air reaction area and an air distribution area are provided on the front surface of the cathode plate. The air distribution area is disposed on opposite sides of the air reaction area. A first sealing groove is provided around the air reaction area and the air distribution area. A cooling area and a coolant distribution area are provided on the back surface of the cathode plate. The coolant distribution area is disposed on opposite sides of the cooling area. A support structure is provided in at least one coolant distribution area on the side of the cooling area to support a part of the electrode plate area where the first sealing groove is located, avoiding the sealing gasket in the first sealing groove from squeezing the anode plate and the cathode plate, resulting in poor sealing of the anode and cathode gas paths, and improving the airtightness and performance of the fuel cell stack.

[0027] Other features and advantages of the present application will become apparent from the following detailed description, or will be learned in part from the practice of the present application.

[0028] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0030] Figure 1 is a front view schematic diagram of the anode plate in an embodiment of the present application.

[0031] Figure 2 is a front view schematic diagram of the cathode plate in an embodiment of the present application.

[0032] Figure 3 is a back view schematic diagram of the cathode plate in an embodiment of the present application.

[0033] Figure 4 is a schematic diagram of the coolant inlet in an embodiment of the present application.

[0034] Figure 5 is a schematic diagram of the structure of the membrane electrode in an embodiment of the present application.

[0035] Figure 6 is a schematic diagram of the structure of the air outlet in an embodiment of the present application.

[0036] Figure 7 is a schematic diagram of the border membrane at the air outlet in an embodiment of the present application.

[0037] Figure 8 is a schematic diagram of the structure of the fuel cell stack in an embodiment of the present application.

[0038] Description of the reference numerals:

[0039] 100, anode plate; 110, hydrogen reaction zone; 120, hydrogen distribution zone; 121, second ridge; 131, hydrogen inlet; 132, hydrogen outlet; 140, first sinking zone;

[0040] 200, Cathode plate; 210, Air reaction zone; 220, Air distribution zone; 221, First ridge; 231, Air inlet; 232, Air outlet; 240, Cooling zone; 250, Coolant distribution zone; 251, Support column; 252, Flow guide column; 261, Coolant inlet; 262, Coolant outlet; 271, First sealing groove; 280, Second sinking zone;

[0041] 300, First end plate; 400, Second end plate; 500, Membrane electrode; 510, Proton exchange membrane; 520, Border membrane; 530, Catalyst layer; 540, Gas diffusion layer;

[0042] 610, First current collector plate; 620, Second current collector plate; 710, First electrode plate; 720, Second electrode plate. Detailed implementation manners

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.

[0044] In addition, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of this application. However, those skilled in the art will realize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of this application.

[0045] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted here that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0046] See Figure 1 and Figure 4 As shown, in this embodiment, the electrode plate includes an anode plate 100 and a cathode plate 200. The anode plate 100 has opposite front and back surfaces, and a hydrogen reaction zone 110 is provided on the front surface of the anode plate 100. The specific structure of the hydrogen reaction zone 110 is not shown.

[0047] The cathode plate 200 has opposite front and back sides, and the front side of the cathode plate 200 is disposed opposite to the front side of the anode plate 100. The front side of the cathode plate 200 is provided with an air reaction zone 210 and an air distribution zone 220, and the air distribution zone 220 is disposed on opposite sides of the air reaction zone 210. The specific structure of the air reaction zone 210 is not illustrated, and a partial illustration of the specific structure of the air distribution zone 220 is provided. A first sealing groove 271 is provided around the air reaction zone 210 and the air distribution zone 220, and the first sealing groove 271 is used for installing a gasket to seal the air reaction zone 210 and the air distribution zone 220 to prevent air leakage.

[0048] The back side of the cathode plate 200 is provided with a cooling zone 240 and a coolant distribution zone 250, and the coolant distribution zone 250 is disposed on opposite sides of the cooling zone 240. The specific structure of the cooling zone 240 is not illustrated, and a partial illustration of the specific structure of the coolant distribution zone 250 is provided. A coolant inlet 261 and a coolant outlet 262 are respectively provided at both ends of the cathode plate 200, and both the coolant inlet 261 and the coolant outlet 262 communicate the front and back sides of the cathode plate 200, and both the coolant inlet 261 and the coolant outlet 262 communicate with the cooling zone 240 through the coolant distribution zone 250.

[0049] A support structure is provided in the coolant distribution zone 250 on at least one side of the cooling zone 240. The support structure and the first sealing groove 271 are respectively located on both sides of the cathode plate 200, and the orthographic projection of the support structure on the front side of the cathode plate 200 intersects with the first sealing groove 271. The support structure is used to support the partial plate region where the first sealing groove 271 is located.

[0050] Existing bipolar plates include an anode plate and a cathode plate. A sealing groove is further provided on the front side of the cathode plate, and a sealing strip is installed in the sealing groove to surround and seal the air reaction zone, the air distribution zone, the air inlet, and the air outlet. The coolant distribution zone on the front side of the cathode plate lacks sufficient structural support. During stacking, the sealing strip presses the cathode plate, causing the cathode plate to deform, and even causing both the cathode plate and the anode plate to deform, thereby affecting the airtightness of the sealing strip and resulting in the situation of hydrogen-oxygen cross-flow of water, seriously affecting the performance of the fuel cell stack.

[0051] In this embodiment, the electrode plate includes an anode plate 100 and a cathode plate 200. The front surface of the cathode plate 200 is disposed opposite to the front surface of the anode plate 100. An air reaction area 210 and an air distribution area 220 are provided on the front surface of the cathode plate 200. The air distribution area 220 is disposed on two opposite sides of the air reaction area 210. A first sealing groove 271 is provided around the air reaction area 210 and the air distribution area 220. A cooling area 240 and a coolant distribution area 250 are provided on the back surface of the cathode plate 200. The coolant distribution area 250 is disposed on two opposite sides of the cooling area 240. A support structure is provided in at least one of the coolant distribution areas 250 on one side of the cooling area 240, for supporting a part of the electrode plate area where the first sealing groove 271 is located, avoiding the gasket in the first sealing groove 271 from squeezing the anode plate 100 and the cathode plate 200, resulting in poor sealing of the anode-cathode gas path, and improving the airtightness and performance of the fuel cell stack.

[0052] See Figures 1 to 4 As shown, support structures are provided in both of the coolant distribution areas 250 on two sides of the cooling area 240.

[0053] Support structures are provided in both of the coolant distribution areas 250 on two sides of the cooling area 240, avoiding deformation of the first sealing grooves 271 at both ends of the anode plate 100 and the cathode plate 200, and further resulting in poor sealing of the anode-cathode gas path.

[0054] See Figures 1 to 4 As shown, a coolant inlet 261 and a coolant outlet 262 are respectively provided at both ends of the cathode plate 200. Both the coolant inlet 261 and the coolant outlet 262 communicate with the front surface and the back surface of the cathode plate 200. Both the coolant inlet 261 and the coolant outlet 262 communicate with the cooling area 240 through the coolant distribution area 250. The support structure is provided on one side of the coolant distribution area 250 close to the coolant inlet 261 and on one side of the coolant distribution area 250 close to the coolant outlet 262.

[0055] The support structure is provided on one side of the coolant distribution area 250 close to the coolant inlet 261 and on one side of the coolant distribution area 250 close to the coolant outlet 262, which can reduce or eliminate the influence of the support structure on the distribution of the coolant in the coolant distribution area 250.

[0056] See Figures 1 to 4 As shown, the support structure includes a plurality of support columns 251 arranged at intervals. The support columns 251 are arranged in a row and extend along the extending direction of the first sealing groove 271. The orthographic projection of the support columns 251 on the front surface of the cathode plate 200 is located in the first sealing groove 271. The support columns 251 include cylinders, and the diameter of the support columns 251 is less than or equal to the width of the first sealing groove 271.

[0057] The diameter of the support post 251 is less than or equal to the width of the first sealing groove 271, which can prevent the oversized size of the support post 251 from affecting the coolant distribution in the coolant distribution area 250.

[0058] It should be noted that the diameter of the support post 251 can be less than or equal to the width of the first sealing groove 271, but it is not limited to this. The diameter of the support post 251 can also be greater than the width of the first sealing groove 271, which can be determined according to specific circumstances.

[0059] See Figures 1 to 4 As shown, the coolant distribution area 250 is also provided with a plurality of diversion posts 252 arranged at intervals. The diversion posts 252 include cylinders. The column surface of the diversion posts 252 distributes the coolant from the coolant inlet 261 to different cooling channels in the cooling area 240 or converges the coolant from different cooling channels to the coolant outlet 262.

[0060] The support structure includes a plurality of support posts 251 arranged at intervals. Both the support posts 251 and the diversion posts 252 are columnar bodies and are designed as cylinders, which can reduce or eliminate the influence of the support posts 251 on the coolant distribution in the coolant distribution area 250.

[0061] In some embodiments, the support posts 251 are part of the diversion posts 252 located in the plate region. That is to say, the support posts 251 are a row of diversion posts 252 in the coolant distribution area 250 close to the coolant inlet 261 and a row of diversion posts 252 in the coolant distribution area 250 close to the coolant outlet 262.

[0062] The support posts 251 are part of the diversion posts 252 located in the plate region. On the one hand, the diversion posts 252 distribute the coolant from the coolant inlet 261 to different cooling channels in the cooling area 240 or converge the coolant from different cooling channels to the coolant outlet 262. On the other hand, they support the part of the plate region where the first sealing groove 271 is located, preventing the gasket in the first sealing groove 271 from squeezing the anode plate 100 and the cathode plate 200, resulting in poor sealing of the anode-cathode gas path.

[0063] See Figure 1 and Figure 2 As shown in

[0064] At least one of the hydrogen reaction area 110 and the air reaction area 210 is provided with a sinking area at the periphery. Among them: a first sinking area 140 can be provided at the periphery of the hydrogen reaction area 110, and a second sinking area 280 can be provided at the periphery of the air reaction area 210. The sinking area is used to accommodate the overlapping area of the border film 520 and the gas diffusion layer 540 of the membrane electrode 500. Figure 5 The membrane electrode 500 is arranged between the anode plate 100 and the cathode plate 200. See Figure 5As shown, the membrane electrode 500 includes a proton exchange membrane 510, a border membrane 520, a catalyst layer 530, and a gas diffusion layer 540. The border membrane 520 is disposed around the edge of the proton exchange membrane 510 on at least one side of the proton exchange membrane 510. The catalyst layer 530 is disposed on both sides of the proton exchange membrane 510 and within the area enclosed by the border membrane 520. The gas diffusion layer 540 is disposed on both sides of the catalyst layer 530 on both sides, and the gas diffusion layer 540 covers the catalyst layer 530 and a part of the border membrane 520. The thickness of the border membrane 520 is greater than the thickness of the catalyst layer 530, and the thickness difference between the two is H. The depth of the sinking area is greater than or equal to the thickness difference H between the border membrane 520 and the catalyst layer 530. The height of the overlapping area between the gas diffusion layer 540 and the border membrane 520 relative to the proton exchange membrane 510 is greater than the height of the overlapping area between the gas diffusion layer 540 and the catalyst layer 530 relative to the proton exchange membrane 510.

[0065] At least one of the hydrogen reaction area 110 and the air reaction area 210 is provided with a sinking area around it. That is to say, when the border membrane 520 is disposed on one side of the proton exchange membrane 510 of the membrane electrode 500, at least one of the hydrogen reaction area 110 and the air reaction area 210 is provided with a sinking area around it. When the border membrane 520 is disposed on both sides of the proton exchange membrane 510 of the membrane electrode 500, both the hydrogen reaction area 110 and the air reaction area 210 are provided with sinking areas around them.

[0066] At least one of the hydrogen reaction area 110 and the air reaction area 210 is provided with a sinking area around it. The sinking area is provided corresponding to the border membrane 520 and is used to accommodate the overlapping area of the border membrane 520 and the gas diffusion layer 540. With this design, when stacking, the force on the gas diffusion layer 540 of the membrane electrode 500 is more uniform, the interfacial contact resistance is smaller, and it is easier to exert the performance of the membrane electrode 500.

[0067] See Figure 1 、 Figure 2 and Figure 5 As shown, the border membrane 520 is disposed around the edge of the proton exchange membrane 510 on both sides of the proton exchange membrane 510. Both the hydrogen reaction area 110 and the air reaction area 210 are provided with sinking areas around them. Among them: a first sinking area 140 can be provided around the hydrogen reaction area 110, and a second sinking area 280 can be provided around the air reaction area 210.

[0068] Both the hydrogen reaction area 110 and the air reaction area 210 are provided with sinking areas around them. The sinking area is provided corresponding to the border membrane 520 and is used to accommodate the overlapping area of the border membrane 520 and the gas diffusion layer 540. With this design, when stacking, the force on the gas diffusion layer 540 of the membrane electrode 500 is more uniform, the interfacial contact resistance is smaller, and it is easier to exert the performance of the membrane electrode 500.

[0069] See Figure 1 and Figure 2As shown, a hydrogen distribution area 120 is provided on the front surface of the anode plate 100. The hydrogen distribution area 120 is located on opposite sides of the hydrogen reaction area 110. A first sinking area 140 is provided on the periphery of the hydrogen reaction area 110, and the first sinking area 140 passes through the hydrogen distribution area 120. Hydrogen inlets 131 and hydrogen outlets 132 are respectively provided at both ends of the anode plate 100. Both the hydrogen inlets 131 and the hydrogen outlets 132 communicate the front and back surfaces of the anode plate 100. Both the hydrogen inlets 131 and the hydrogen outlets 132 are communicated with the hydrogen reaction area 110 through the hydrogen distribution area 120. A second sinking area 280 is provided on the periphery of the air reaction area 210, and the second sinking area 280 passes through the air distribution area 220.

[0070] The first sinking area 140 passes through the hydrogen distribution area 120, and the second sinking area 280 passes through the air distribution area 220. With this design, the occupied space of the sinking area can be reduced.

[0071] It should be noted that the first sinking area 140 passes through the hydrogen distribution area 120, and the second sinking area 280 passes through the air distribution area 220, but it is not limited thereto. The first sinking area 140 can also pass between the hydrogen distribution area 120 and the hydrogen inlet 131 and between the hydrogen distribution area 120 and the hydrogen outlet 132. The second sinking area 280 can also pass between the air distribution area 220 and the air inlet 231 and between the air distribution area 220 and the air outlet 232. It can be determined according to the specific situation.

[0072] See Figure 2 、 Figure 6 and Figure 7 As shown, the air distribution area 220 includes a plurality of first ridges 221 arranged at intervals. The area between the first ridges 221 is an air distribution flow channel. The first ridges 221 evenly distribute the air from the air inlet 231 to different air flow channels in the air reaction area 210 or converge the air from different air flow channels to the air outlet 232.

[0073] During stacking, the membrane electrode 500 is arranged between the anode plate 100 and the cathode plate 200. There is an overlap between the border film 520 of the membrane electrode 500 and the areas of the air distribution area 220 near the air inlet 231 and near the air outlet 232. At least part of the first ridges 221 extend to the air inlet 231 and the air outlet 232.

[0074] The first ridges 221 of the air distribution area 220 extend to the air inlet 231 and the air outlet 232, which can prevent the border film 520 from being deformed under pressure and shifting towards the air distribution flow channel, resulting in a reduction in the flow area of the air distribution flow channel or blocking of the air distribution flow channel.

[0075] In some embodiments, the hydrogen distribution region 120 includes a plurality of second ridges 121 arranged at intervals, and the region between the second ridges 121 is a hydrogen distribution flow channel. The second ridges 121 evenly distribute the hydrogen from the hydrogen inlet 131 to different hydrogen flow channels in the hydrogen reaction region 110 or converge the hydrogen from different hydrogen flow channels to the hydrogen outlet 132.

[0076] During stacking, the membrane electrode 500 is disposed between the anode plate 100 and the cathode plate 200, and there is an overlap between the border membrane 520 of the membrane electrode 500 and the regions of the hydrogen distribution region 120 near the hydrogen inlet 131 and near the hydrogen outlet 132. At least a part of the second ridges 121 extends to the hydrogen inlet 131 and the hydrogen outlet 132.

[0077] The second ridges 121 of the hydrogen distribution region 120 extend to the hydrogen inlet 131 and the hydrogen outlet 132, which can prevent the border membrane 520 from being deformed under pressure and shifting towards the hydrogen distribution flow channel, resulting in a reduction in the flow area of the hydrogen distribution flow channel or blockage of the hydrogen distribution flow channel.

[0078] In some embodiments, the distance between adjacent first ridges 221 at the air inlet 231 and the air outlet 232 is 2 mm to 3 mm, and the distance between adjacent second ridges 121 at the hydrogen inlet 131 and the hydrogen outlet 132 is 2 mm to 3 mm.

[0079] The distance between adjacent first ridges 221 at the air inlet 231 and the air outlet 232 is 2 mm to 3 mm, and the distance between adjacent second ridges 121 at the hydrogen inlet 131 and the hydrogen outlet 132 is 2 mm to 3 mm, so that the distance between the ridges is not too large, causing the border membrane 520 to be pressed and shifted inwards to block the flow channel, and at the same time, the distance between the ridges is not too small, affecting the entry and exit of hydrogen and air from the distribution region.

[0080] The present application also provides a fuel cell system, which includes a fuel cell stack. The fuel cell stack includes a plate, a first end plate 300, a second end plate 400, and a membrane electrode 500. Refer to Figure 8 As shown, the membrane electrode 500 is disposed between the first end plate 300 and the second end plate 400, the anode plate 100 is disposed between the first end plate 300 and the membrane electrode 500, and the cathode plate 200 is disposed between the membrane electrode 500 and the second end plate 400.

[0081] Among them, the front surfaces of the anode plate 100 and the cathode plate 200 are arranged opposite to each other, and the anode plate 100, the cathode plate 200, and the membrane electrode 500 therebetween form a set of battery units. When the fuel cell stack includes multiple sets of battery units, the cathode plate 200 of the first set of battery units and the anode plate 100 of the second set of battery units are adhesively connected.

[0082] In addition, the fuel cell stack further includes a first current collector plate 610, a second current collector plate 620, a first plate 710, and a second plate 720. The first current collector plate 610 is disposed between the first end plate 300 and the anode plate 100, and the second current collector plate 620 is disposed between the second end plate 400 and the cathode plate 200. The first plate 710 is disposed between the first current collector plate 610 and the anode plate 100, and the first plate 710 reduces the air reaction zone 210 and the air distribution zone 220 compared with the cathode plate 200. The second plate 720 is disposed between the second current collector plate 620 and the cathode plate 200, and the second plate 720 reduces the hydrogen reaction zone 110 and the hydrogen distribution zone 120 compared with the anode plate 100.

[0083] The fuel cell system includes plates, and the plates include an anode plate 100 and a cathode plate 200. The front surface of the cathode plate 200 is disposed opposite to the front surface of the anode plate 100. An air reaction zone 210 and an air distribution zone 220 are provided on the front surface of the cathode plate 200. The air distribution zone 220 is disposed on opposite sides of the air reaction zone 210. A first sealing groove 271 is provided around the air reaction zone 210 and the air distribution zone 220. A cooling zone 240 and a coolant distribution zone 250 are provided on the back surface of the cathode plate 200. The coolant distribution zone 250 is disposed on opposite sides of the cooling zone 240. A support structure is provided in at least one side of the coolant distribution zone 250 of the cooling zone 240 for supporting a partial plate region where the first sealing groove 271 is located, so as to prevent the gasket in the first sealing groove 271 from squeezing the anode plate 100 and the cathode plate 200, resulting in poor sealing of the anode and cathode gas paths, improving the airtightness and performance of the stack, and further improving the performance of the fuel cell system.

[0084] In some embodiments, the membrane electrode 500 includes a proton exchange membrane 510, a border membrane 520, a catalyst layer 530, and a gas diffusion layer 540. The border membrane 520 is disposed around the edge of the proton exchange membrane 510 on at least one side of the proton exchange membrane 510. The catalyst layer 530 is disposed on both sides of the proton exchange membrane 510 and within the region surrounded by the border membrane 520. The gas diffusion layer 540 is disposed on both sides of the catalyst layer 530 on both sides, and the gas diffusion layer 540 covers the catalyst layer 530 and a part of the border membrane 520. The compression amount of the gas diffusion layer 540 is 15% - 25%, and preferably, the compression amount of the gas diffusion layer 540 is 20%.

[0085] During stack assembly, the force on the gas diffusion layer 540 of the membrane electrode 500 is more uniform, the interfacial contact resistance is smaller, and it is easier to exert the performance of the membrane electrode 500. When the compression amount of the gas diffusion layer 540 is 20%, the performance of the membrane electrode 500 reaches the best state.

[0086] The present application further provides an automobile, which includes a power system and a fuel cell system. The fuel cell system is connected to the power system to supply power to the power system.

[0087] The vehicle includes a fuel cell system, the fuel cell system includes a plate electrode, the plate electrode includes an anode plate 100 and a cathode plate 200. A cooling area 240 and a coolant distribution area 250 are arranged on the back surface of the cathode plate 200. A support structure is arranged in the coolant distribution area 250 on at least one side of the cooling area 240 for supporting a partial plate electrode area where a first sealing groove 271 is located, so as to avoid the gasket in the first sealing groove 271 from extruding the anode plate 100 and the cathode plate 200, resulting in poor sealing of the anode and cathode gas paths, improving the airtightness and performance of the fuel cell stack, and further enhancing the performance of the fuel cell system and the vehicle.

[0088] The terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0089] In the present application, unless otherwise clearly specified and defined, terms such as "assembly", "connection", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0090] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and the description of the present application shall fall within the scope covered by the patent of the present application.

Claims

1. A plate, characterized in that, Comprising: An anode plate having opposite front and back surfaces, with a hydrogen reaction zone provided on the front surface of the anode plate; A cathode plate having opposite front and back surfaces, the front surface of the cathode plate being disposed opposite to the front surface of the anode plate. An air reaction zone and an air distribution zone are provided on the front surface of the cathode plate, and a first sealing groove is provided around the air reaction zone and the air distribution zone; the air distribution zone is disposed on opposite sides of the air reaction zone. A cooling zone and a coolant distribution zone are provided on the back surface of the cathode plate, the coolant distribution zone being disposed on opposite sides of the cooling zone. A support structure is provided on at least one side of the coolant distribution zone of the cooling zone, and the support structure is used to support a partial plate region where the first sealing groove is located.

2. The plate according to claim 1, characterized in that, The support structure is provided on the coolant distribution zones on both sides of the cooling zone.

3. The plate according to claim 2, characterized in that, A coolant inlet and a coolant outlet are respectively provided at two ends of the cathode plate, both the coolant inlet and the coolant outlet communicating the front and back surfaces of the cathode plate. Both the coolant inlet and the coolant outlet are communicated with the cooling zone through the coolant distribution zone, and the support structure is provided on the side of the coolant distribution zone close to the coolant inlet and on the side of the coolant distribution zone close to the coolant outlet.

4. The plate according to claim 1, characterized in that, The support structure includes a plurality of spaced support columns.

5. The plate according to claim 4, characterized in that, A coolant inlet and a coolant outlet are respectively provided at two ends of the cathode plate, both the coolant inlet and the coolant outlet communicating the front and back surfaces of the cathode plate. Both the coolant inlet and the coolant outlet are communicated with the cooling zone through the coolant distribution zone, and a plurality of spaced flow guiding columns are further provided in the coolant distribution zone. The flow guiding columns include cylinders, and the column surface of the flow guiding columns distributes the coolant from the coolant inlet to different cooling channels in the cooling zone or converges the coolant from different cooling channels to the coolant outlet.

6. The plate according to claim 5, characterized in that, The support columns are partial flow guiding columns located in the plate region.

7. The plate according to claim 1, characterized in that, A sinking zone is provided on the periphery of at least one of the hydrogen reaction zone and the air reaction zone, and the sinking zone is used to accommodate the overlapping area of the border film and the gas diffusion layer of the membrane electrode.

8. The plate according to claim 7, characterized in that, Sinking zones are provided on the peripheries of both the hydrogen reaction zone and the air reaction zone, where: the sinking zone on the periphery of the hydrogen reaction zone is the first sinking zone, and the sinking zone on the periphery of the air reaction zone is the second sinking zone.

9. The plate according to claim 7, characterized in that, A hydrogen distribution zone is provided on the front surface of the anode plate, the hydrogen distribution zone being located on opposite sides of the hydrogen reaction zone. A first sinking zone is provided on the periphery of the hydrogen reaction zone, and the first sinking zone passes through the hydrogen distribution zone. A second sinking zone is provided on the periphery of the air reaction zone, and the second sinking zone passes through the air distribution zone.

10. The plate according to claim 1, characterized in that, An air inlet and an air outlet are respectively provided at two ends of the cathode plate, both the air inlet and the air outlet communicating the front and back surfaces of the cathode plate. Both the air inlet and the air outlet are communicated with the air reaction zone through the air distribution zone, and the air distribution zone includes a plurality of spaced first ridges, and at least part of the first ridges extend to the air inlet and the air outlet.

11. The plate according to claim 10, characterized in that, The front surface of the anode plate is provided with a hydrogen gas distribution area, the hydrogen gas distribution area is located on opposite sides of the hydrogen gas reaction area, a hydrogen gas inlet and a hydrogen gas outlet are respectively arranged at two ends of the anode plate, both the hydrogen gas inlet and the hydrogen gas outlet communicate the front surface and the back surface of the anode plate, both the hydrogen gas inlet and the hydrogen gas outlet are communicated with the hydrogen gas reaction area through the hydrogen gas distribution area, and the hydrogen gas distribution area includes a plurality of second ridges arranged at intervals, and at least part of the second ridges extend to the hydrogen gas inlet and the hydrogen gas outlet.

12. The plate according to claim 11, characterized in that, The distance between adjacent first ridges at the air inlet and the air outlet is 2 mm to 3 mm, and the distance between adjacent second ridges at the hydrogen gas inlet and the hydrogen gas outlet is 2 mm to 3 mm.

13. A fuel cell system, characterized in that, It includes a fuel cell stack, and the fuel cell stack includes the electrode plates as described in any one of claims 1 to 12, a first end plate, a second end plate and a membrane electrode. The membrane electrode is arranged between the first end plate and the second end plate, the anode plate is arranged between the first end plate and the membrane electrode, and the cathode plate is arranged between the membrane electrode and the second end plate.

14. The fuel cell system according to claim 13, characterized in that, The membrane electrode includes a proton exchange membrane and a gas diffusion layer. The gas diffusion layer is arranged on both sides of the proton exchange membrane, and the compression amount of the gas diffusion layer is 15% to 25%.

15. A vehicle, characterized in that, It includes: A power system; The fuel cell system as described in claim 13, and the fuel cell system is connected to the power system.

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