Polar plate, fuel cell and vehicle
By designing gas channels, cooling channels, and distribution structures on the electrode plates, the problems of flow field uniformity and flow resistance were solved, achieving uniform distribution of reactant gas and cooling medium, and improving the electrode performance of the fuel cell.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-31
AI Technical Summary
How to design electrode structures to improve flow field uniformity, reduce flow resistance in the distribution zone, and enhance electrode performance of fuel cells.
The electrode design includes gas channels and cooling channels. The gas distribution structure is connected to the reaction zone through a straight gas distribution channel. The cooling medium is uniformly introduced into the cooling zone through a convex structure. Combined with a bridge structure and a sealing structure, the flow resistance is reduced and the flow field uniformity is improved.
This achieves uniform distribution of reactant gas and cooling medium, reduces flow resistance in the distribution zone, maximizes electrode performance, and improves electrode performance and flow field uniformity of the fuel cell.
Smart Images
Figure CN224067662U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of fuel cells, in particular to a bipolar plate, a fuel cell and a vehicle. BACKGROUND
[0002] A fuel cell is a device that converts the chemical energy of a fuel directly into electricity. Due to its zero emissions, high efficiency and power density, it has attracted the research interest of countries around the world. The bipolar plate is an important component of the fuel cell, which has multiple functions, including separating individual cells, collecting current, providing structural support, distributing hydrogen, oxygen and facilitating water management in the entire active area. How to design the bipolar plate structure to improve flow field uniformity and reduce distribution area flow resistance becomes a technical problem to be solved. CONTENT OF THE INVENTION
[0003] The present application provides a bipolar plate, a fuel cell and a vehicle to solve the above technical problems.
[0004] Embodiments of the present application are implemented as follows:
[0005] A bipolar plate includes a plate body, a gas channel and a cooling channel are arranged at the end of the plate body along the length direction, and opposite sides of the plate body along the thickness direction are a first side and a second side. The first side is provided with a reaction zone and a first distribution zone, and the first distribution zone is located between the gas channel and the reaction zone. The first distribution zone is provided with a first bridge structure and a gas distribution structure. The gas distribution structure includes a plurality of linear gas distribution channels. The first bridge structure is connected to one end of the gas distribution channel, and the other end of the gas distribution channel is connected to the reaction zone. The second side is provided with a cooling zone and a second distribution zone, and the second distribution zone is connected to the cooling channel and the cooling zone. The second distribution zone is provided with a cooling distribution structure, and the cooling distribution structure includes a plurality of convex point structures arranged at intervals. The projection of the cooling distribution structure on the first side is arranged adjacent to the gas distribution structure.
[0006] In this way, the reaction gas can be introduced into the gas distribution structure through the first bridge structure, and then directly into the reaction zone through the linear gas distribution structure. The cooling medium can also be uniformly introduced into the cooling zone through the plurality of convex point structures in the second distribution zone, thereby reducing the flow resistance of the distribution zone, improving the flow field uniformity, and maximizing the performance of the electrode.
[0007] In one possible implementation, the gas distribution structure includes a plurality of distribution ridges, and the gas distribution channel is formed between adjacent distribution ridges. The ratio between the distance between the ridge lines of adjacent distribution ridges and the depth of the gas distribution channel is 1-1.5.
[0008] In a possible implementation: the reaction zone is provided with a plurality of flow guide ridges, and a reaction flow channel is formed between adjacent flow guide ridges. The depth of the reaction flow channel is 0.2-0.4 mm; and / or, the ratio between the distance between ridge lines of adjacent flow guide ridges and the depth of the reaction flow channel is 1-2.
[0009] In a possible implementation: the cathode plate is provided with a reaction flow channel, and the depth of the reaction flow channel is 0.3-0.4 mm.
[0010] In a possible implementation: the anode plate is provided with a reaction flow channel, and the depth of the reaction flow channel is 0.2-0.25 mm.
[0011] In a possible implementation: the gas passage includes a first gas passage and a second gas passage, and the cooling passage is located between the first gas passage and the second gas passage. The cathode plate is provided with the first bridge structure that connects the first gas passage and the gas distribution structure; or, the anode plate is provided with the first bridge structure that connects the second gas passage and the gas distribution structure.
[0012] In a possible implementation: the first gas passage or the second gas passage is provided with a second bridge structure on the side facing the first distribution zone, and the second bridge structure connects the first bridge structure and the first gas passage or the second gas passage.
[0013] In a possible implementation: the second distribution zone is further provided with a third bridge structure that connects the cooling passage and the cooling distribution structure.
[0014] In a possible implementation: the first side is further provided with a first sealing structure, and the first sealing structure includes a first part and a second part. The first part is arranged around the gas passage and the cooling passage, and the first part separates the gas passage and the cooling passage. The second part is arranged around the outer periphery of the first distribution zone and the reaction zone. The width of the first sealing structure is W1, where W1≥4 mm.
[0015] In a possible implementation: the second side is further provided with a second sealing structure, and the second sealing structure includes a third part and a fourth part. The third part is arranged around the gas passage, and the fourth part is arranged around the outer periphery of the cooling passage, the second distribution zone, and the cooling zone. The width of the second sealing structure is W2, where W2≥3 mm.
[0016] Embodiments of the present application also provide a fuel cell including a plurality of the above-mentioned electrode plates.
[0017] Embodiments of the present application also provide a vehicle including the above-mentioned fuel cell. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 A front view structural schematic diagram of the polar plate of an embodiment of the present application is shown.
[0020] Figure 2 A front view structural schematic diagram of the polar plate of an embodiment of the present application is shown. Figure 1 A rear view structural schematic diagram of the polar plate is shown.
[0021] Figure 3 A front view structural schematic diagram of the polar plate of an embodiment of the present application is shown. Figure 1 An enlarged view of the partial structure of the polar plate is shown.
[0022] Figure 4 An enlarged view of the partial structure of the polar plate is shown. Figure 2 An enlarged view of the partial structure of the polar plate is shown.
[0023] Figure 5 A front view structural schematic diagram of the polar plate of an embodiment of the present application is shown.
[0024] Figure 6 A front view structural schematic diagram of the polar plate of an embodiment of the present application is shown. Figure 5 A rear view structural schematic diagram of the polar plate is shown.
[0025] Figure 7 An enlarged view of the partial structure of the polar plate is shown. Figure 5 An enlarged view of the partial structure of the polar plate is shown.
[0026] Figure 8 A fluid simulation result statistical diagram of the reaction flow channel in the polar plate is shown.
[0027] Figure 9 A test result statistical diagram of the polar plate short stack test is shown.
[0028] Figure 10 A structural schematic diagram of a vehicle of an embodiment of the present application is shown.
[0029] Main element symbol explanation:
[0030] Polar plate 100
[0031] Plate body 10
[0032] First side 11
[0033] Second side 12
[0034] Gas channel 20
[0035] First gas channel 21
[0036] Second gas channel 22
[0037] Second bridge structure 23
[0038] Cooling channel 30
[0039] First distribution zone 40
[0040] First bridge structure 41
[0041] Bridge ridge 411
[0042] Bridge channel 412
[0043] Gas distribution structure 42
[0044] Gas distribution flow 421
[0045] Distribution ridge 422
[0046] Gas via 43
[0047] Reaction zone 50
[0048] Flow directing ridge 51
[0049] Reaction channel 52
[0050] Second distribution zone 60
[0051] Cooling distribution structure 61
[0052] Bump structure 611
[0053] Third bridge structure 62
[0054] Cooling zone 70
[0055] First sealing structure 80
[0056] First portion 81
[0057] Second portion 82
[0058] Second sealing structure 90
[0059] Third portion 91
[0060] Fourth portion 92
[0061] Glue overflow groove 93
[0062] Fuel cell 200
[0063] Vehicle 300
[0064] The following detailed description will further describe the present application with reference to the above-mentioned figures. DETAILED DESCRIPTION
[0065] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0066] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.
[0068] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0069] See Figures 1 to 7 This embodiment provides an electrode plate 100, including a plate body 10. A gas channel 20 and a cooling channel 30 are provided at the ends of the plate body 10 along its length. The plate body 10 has a first side 11 and a second side 12 on opposite sides along its thickness. The first side 11 has a reaction zone 50 and a first distribution zone 40, located between the gas channel 20 and the reaction zone 50. The first distribution zone 40 has a first bridge structure 41 and a gas distribution structure 42. The gas distribution structure 42 includes multiple straight gas distribution channels 421. The first bridge structure 41 connects the gas channel 20 and one end of the gas distribution channel 421, and the other end of the gas distribution channel 421 connects to the reaction zone 50. The second side 12 has a cooling zone 70 and a second distribution zone 60, connecting the cooling channel 30 and the cooling zone 70. The second distribution zone 60 has a cooling distribution structure 61, which includes multiple spaced-apart protrusion structures 611. The projection of the cooling distribution structure 61 onto the first side 11 is adjacent to the gas distribution structure 42.
[0070] In this way, the reactant gas can be introduced into the gas distribution structure 42 through the first bridge structure 41, and then directly into the reaction zone 50 through the linear gas distribution structure 42, reducing unnecessary diffusion. The cooling medium can also be uniformly introduced into the cooling zone 70 through the flow guide gap formed between multiple protrusion structures 611, thereby reducing the flow resistance of the distribution zone, improving the uniformity of the flow field, and maximizing the electrode performance.
[0071] In the illustrated embodiment, the length direction of the electrode plate 100 is the horizontal direction shown in the figure, and the thickness direction of the electrode plate 100 is the normal direction of the plane shown in the figure.
[0072] In some embodiments, such as Figure 3 and Figure 7 As shown, the gas distribution structure 42 includes multiple distribution ridges 422, and gas distribution channels 421 are formed between adjacent distribution ridges 422. The ratio between the distance between the ridge lines of adjacent distribution ridges 422 and the depth of the gas distribution channel 421 is 1-1.5, and can be, but is not limited to, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, or any range between these values. The ridge line of the distribution ridge 422 can be the centerline of the top surface of the distribution ridge 422.
[0073] By constraining the dimensional parameters of the gas distribution channel 421, it is beneficial to improve the uniformity of gas distribution, reduce flow resistance, and thus improve the uniformity of the flow field.
[0074] In some embodiments, the first bridging structure 41 includes a plurality of bridging ridges 411, which are spaced apart, and bridging channels 412 are formed between adjacent bridging ridges 411. The width and depth of the bridging channels 412 are approximately the same. Each bridging channel 412 can connect to one or more gas distribution channels 421.
[0075] In some embodiments, such as Figure 3 and Figure 7 As shown, the reaction zone 50 is provided with multiple guide ridges 51, and reaction channels are formed between adjacent guide ridges 51. The depth of the reaction channels is 0.2mm-0.4mm, and can be, but is not limited to, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, or any value between these ranges. In some embodiments, the ratio between the distance between the ridge lines of adjacent guide ridges 51 and the depth of the reaction channels is 1-2, and can be, but is not limited to, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, or any value between these ranges. The ridge line of the guide ridge 51 can be the centerline of the top surface of the guide ridge 51.
[0076] By constraining the dimensional parameters of the reaction channel, it is beneficial to improve the uniformity of the flow field in the reaction zone 50, allowing the reaction gas to react fully in the reaction zone 50, thereby improving the electrode performance.
[0077] In the embodiments of this application, the gas distribution channel 421 and the reaction channel are formed on the first side 11 of the electrode plate 100 by an imprinting process. The second distribution area 60 and the cooling area 70 on the second side 12 of the electrode plate 100 are also passively formed with corresponding channel structures. Multiple protrusion structures 611 in the cooling distribution structure 61 can be arrayed and distributed in the area of the second distribution area 60 without channel structures. The flow guide gaps formed between the multiple protrusion structures 611 connect to the cooling channel 30. The cooling medium introduced through the cooling distribution structure 61 can flow uniformly in these channel structures, achieving effective cooling and reducing local hot spots. Furthermore, the multiple protrusion structures 611 also help improve the mechanical strength of the electrode plate 100 and mitigate the deformation problem of the electrode plate 100.
[0078] In some embodiments, the gas channel 20 includes a first gas channel 21 and a second gas channel 22, and a cooling channel 30 is located between the first gas channel 21 and the second gas channel 22. The electrode plate 100 has a first gas channel 21, a second gas channel 22, and a cooling channel 30 at opposite ends along its length. The first gas channel 21 at one end serves as an oxygen / air inlet, and the first gas channel 21 at the other end serves as an oxygen / air outlet. The second gas channel 22 at one end serves as a hydrogen inlet, and the second gas channel 22 at the other end serves as a hydrogen outlet. The cooling channel 30 at one end serves as a cooling medium inlet, and the cooling channel 30 at the other end serves as a cooling medium outlet. The two sets of first gas channels 21, second gas channels 22, and cooling channels 30 are distributed at both ends of the plate 10 in an angularly symmetrical structure. Two first distribution zones 40 are located at opposite ends of the reaction zone 50 along the length of the electrode plate 100. Each first distribution zone 40 is equipped with a first bridge structure 41 and a gas distribution structure 42 to connect the corresponding gas channel 20 with the reaction zone 50, allowing the reaction gas to flow in from one end of the reaction zone 50 and out from the other end. The reaction water generated during the reaction flows out along with the gas. Two second distribution zones 60 are located at opposite ends of the cooling zone 70 along the length of the electrode plate 100. Each second distribution zone 60 is equipped with a cooling distribution structure 61 to connect the cooling channel 30 with the cooling zone 70, allowing the cooling medium to flow in from one end of the cooling zone 70 and out from the other end.
[0079] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the electrode 100 is a cathode plate 100, and the first bridge structure 41 is disposed on the side of the first distribution area 40 facing the first gas channel 21, the first bridge structure 41 connecting the first gas channel 21 and the gas distribution structure 42. Figure 5 , Figure 6 , Figure 7 As shown, in some embodiments, the electrode plate 100 is an anode plate 100, and the first bridge structure 41 is disposed on the side of the first distribution area 40 facing the second gas channel 22. The first bridge structure 41 connects the second gas channel 22 and the gas distribution structure 42. In the gas distribution structure 42, multiple linear gas distribution channels 421 are inclined relative to the reaction area 50, which is beneficial for quickly and uniformly introducing the reaction gas into the reaction area 50.
[0080] In some embodiments, the first distribution area 40 is further provided with a gas through hole 43, which is located on the side of the first bridge structure 41 facing away from the gas distribution structure 42, and is used to connect the gas channel 20 with the gas distribution flow channel 421 in the gas distribution structure 42. When the electrode plate 100 is a cathode plate 100, the position of the gas through hole 43 corresponds to the first gas channel 21, connecting the first gas channel 21 with the gas distribution structure 42. When the electrode plate 100 is an anode plate 100, the position of the gas through hole 43 corresponds to the second gas channel 22, connecting the second gas channel 22 with the gas distribution structure 42, and the tilt direction and position of the gas distribution structure 42 are also adjusted accordingly.
[0081] In some embodiments, the electrode 100 is a cathode plate 100, and the depth of the reaction channel is 0.3mm-0.4mm, which may be, but is not limited to, 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.4mm, or any range between these values.
[0082] In some embodiments, the electrode 100 is an anode plate 100, and the depth of the reaction channel is 0.2 mm to 0.25 mm, which may be, but is not limited to, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, or any range between these values.
[0083] By constraining the depth of the reaction channel, the compatibility between the reaction zone 50 and the reaction gas, distribution zone structure, etc., can be improved, thereby further enhancing electrode performance.
[0084] In some embodiments, each gas distribution channel 421 is provided with multiple guide ridges 51, and the number of guide ridges 51 corresponding to each gas distribution channel 421 is the same in the same electrode plate 100, so as to improve the uniformity of the flow field. In one embodiment, as Figure 3As shown, the electrode 100 is a cathode plate, and each gas distribution channel 421 is provided with two guide ridges 51. In another embodiment, as... Figure 7 As shown, the electrode 100 is an anode plate, and each gas distribution channel 421 is provided with three guide ridges 51. In other embodiments, the correspondence between the gas distribution channel 421 and the guide ridges 51 can be adjusted according to the flow rate, type, etc. of the reactant gas to maximize the electrode performance, but this application is not limited to this.
[0085] Please see Figure 2 and Figure 6 In some embodiments, a second bridge structure 23 is provided on the side of the first gas channel 21 or the second gas channel 22 facing the first distribution area 40. The second bridge structure 23 connects the first bridge structure 41 with the first gas channel 21 or the second gas channel 22. The second bridge structure 23 is located on the second side 12, and the second bridge structure 23 connects the gas channel 20 with the gas through hole 43 from the side away from the first bridge structure 41. By providing the first bridge structure 41 and the second bridge structure 23 connecting the gas channel 20 and the gas distribution structure 42 on opposite sides of the electrode plate 100, flow resistance can be improved, and the structural strength of the electrode plate 100 can be increased, reducing deformation.
[0086] In some embodiments, the second distribution area 60 is further provided with a third bridge structure 62, which connects the cooling channel 30 and the cooling distribution structure 61. The third bridge structure 62 can be disposed on the second side 12, located on the side of the second distribution area 60 facing the cooling channel 30, connecting the cooling channel 30 and the flow guide gap between the plurality of protrusion structures 611. The morphology and structure of the second bridge structure 23 and the third bridge structure 62 are similar to those of the first bridge structure 41, and will not be described in detail here.
[0087] Please see Figure 1 and Figure 6In some embodiments, the first side 11 is further provided with a first sealing structure 80, which includes a first part 81 and a second part 82. The first part 81 is arranged around the gas channel 20 and the cooling channel 30, and separates the gas channel 20 from the cooling channel 30. The second part 82 is arranged around the outer periphery of the first distribution area 40 and the reaction area 50. Specifically, the first gas channel 21, the second gas channel 22, and the cooling channel 30 are respectively surrounded by the first part 81 of the first sealing structure 80 to prevent gas or coolant leakage. The first distribution area 40 and the reaction area 50 are in a connected state and no sealing structure is provided. The first gas channel 21 or the second gas channel 22 is connected to the first distribution area 40 through a corresponding bridge structure and a gas through hole 43, and the corresponding gas is introduced into the reaction area 50. Since other areas are sealed, gas mixing is avoided, and the stability of the gas flow direction can also be guaranteed. The width of the first sealing structure 80 is W1, where W1 ≥ 4 mm. Specifically, the first sealing structure 80 may include a groove structure formed on the first side 11 and an elastic seal filled in the groove structure. The compression ratio of the elastic seal is 25%-35% to meet the sealing requirements of the electrode plate 100.
[0088] Please see Figure 2 In some embodiments, the second side 12 is further provided with a second sealing structure 90, which includes a third part 91 and a fourth part 92. The third part 91 is disposed around the gas channel 20, and the fourth part 92 is disposed around the outer periphery of the cooling channel 30, the second distribution area 60, and the cooling area 70. Specifically, the first gas channel 21 and the second gas channel 22 are respectively surrounded by the third part 91 of the second sealing structure 90 to prevent gas leakage into the cooling area 70 or the cooling medium from entering the gas channel 20. The cooling channel 30, the second distribution area 60, and the cooling area 70 are in a connected state without a sealing structure, which facilitates the flow of the cooling medium on the second side 12. The width of the second sealing structure 90 is W2, where W2 ≥ 3 mm. In some embodiments, the second sealing structure 90 can be a groove structure for filling sealant. Figure 4 As shown, an overflow groove 93 can also be provided on the side of the second sealing structure 90 to ensure the bonding effect.
[0089] Embodiments of this application also provide a fuel cell 200, including a plurality of electrode plates 100 as described in the above embodiments.
[0090] Please see Figure 8 Through simulation testing, in the electrode plate 100 of this embodiment, the flow rate ratio of each channel in the reaction zone 50 is around 1.10%, with a difference within 0.1%. The electrode plate 100 of this application achieves the effect of improving the uniformity of the flow field. The flow rate ratio is the ratio of the flow rate in the channel to the total flow rate.
[0091] Please see Figure 9 The short stack test results show that the battery voltage exceeds 0.65V at a current density of 2000mA / cm2, indicating good battery performance. The electrode plate 100 implemented in this application achieves the effect of improving electrode performance.
[0092] Please see Figure 10 The embodiments of this application also provide a vehicle 300, including the fuel cell 200 described in the above embodiments.
[0093] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.
Claims
1. A plate, characterized in that The plate body is provided with a gas passage and a cooling passage at the end along the length direction, and opposite sides along the thickness direction are respectively a first side and a second side; The first side is provided with a reaction zone and a first distribution zone, the first distribution zone is located between the gas passage and the reaction zone; the first distribution zone is provided with a first bridge structure and a gas distribution structure, the gas distribution structure includes a plurality of linear gas distribution channels, the first bridge structure connects the gas passage and one end of the gas distribution channel, and the other end of the gas distribution channel is connected with the reaction zone; The second side is provided with a cooling zone and a second distribution zone, the second distribution zone is connected with the cooling passage and the cooling zone; the second distribution zone is provided with a cooling distribution structure, the cooling distribution structure includes a plurality of interval arranged convex point structures, and the projection of the cooling distribution structure on the first side is adjacent to the gas distribution structure.
2. The plate according to claim 1, wherein: The gas distribution structure includes a plurality of distribution ridges, and the gas distribution channel is formed between adjacent distribution ridges; the ratio between the distance between the ridge lines of adjacent distribution ridges and the depth of the gas distribution channel is 1-1.
5.
3. The plate according to claim 1, wherein: The reaction zone is provided with a plurality of flow guide ridges, and a reaction flow channel is formed between adjacent flow guide ridges; The depth of the reaction flow channel is 0.2mm-0.4mm; and / or, The ratio between the distance between the ridge lines of adjacent flow guide ridges and the depth of the reaction flow channel is 1-2.
4. The plate according to claim 3, wherein: The plate is a cathode plate, and the depth of the reaction flow channel is 0.3mm-0.4mm.
5. The plate according to claim 3, wherein: The plate is an anode plate, and the depth of the reaction flow channel is 0.2mm-0.25mm.
6. The plate according to claim 1, wherein: The gas passage includes a first gas passage and a second gas passage, and the cooling passage is located between the first gas passage and the second gas passage; The plate is a cathode plate, and the first bridge structure connects the first gas passage and the gas distribution structure; or, the plate is an anode plate, and the first bridge structure connects the second gas passage and the gas distribution structure.
7. The plate according to claim 6, wherein: The side of the first gas passage or the second gas passage towards the first distribution zone is provided with a second bridge structure, and the second bridge structure connects the first bridge structure and the first gas passage or the second gas passage.
8. The plate according to claim 1, wherein: The second distribution zone is further provided with a third bridge structure, and the third bridge structure connects the cooling passage and the cooling distribution structure.
9. The plate according to any one of claims 1-8, wherein: The first side further comprises a first seal structure, the first seal structure comprising a first portion and a second portion, the first portion disposed about the gas channel and the cooling channel, the first portion separating the gas channel from the cooling channel, the second portion disposed about an outer periphery of the first distribution zone and the reaction zone; the first seal structure having a width W1, wherein W1≥4 mm; and / or, The second side further comprises a second seal structure, the second seal structure comprising a third portion and a fourth portion, the third portion disposed about the gas channel, the fourth portion disposed about an outer periphery of the cooling channel, the second distribution zone, and the cooling zone; the second seal structure having a width W2, wherein W2≥3 mm.
10. A fuel cell characterized by comprising: A plurality of the polar plates of any one of claims 1-9.
11. A vehicle characterized by comprising: A fuel cell comprising the polar plate of claim 10.