Sealing structure and bipolar plate

Abstract

This invention relates to the field of fuel cell technology, and more particularly to a sealing structure and a bipolar plate. The sealing structure includes an anode seal and a cathode seal, each having an anode mounting port and a cathode mounting port, respectively. The anode and cathode seals are sealed together to form a bipolar plate structure with its periphery sealed by the sealing structure. A gas cavity and a coolant flow channel are formed between the anode and cathode seals. Since the gas cavity and coolant flow channel are located inside the anode and cathode seals and are spaced apart, water and gas cross-contamination between the gas cavity and the coolant flow channel can be effectively avoided. The anode and cathode seals are respectively provided with anode vents and anode pores communicating with the gas cavity. Since the anode vents and anode pores are respectively located in the anode and cathode seals, water and gas cross-contamination during the introduction of anode gas and cathode gas and the exit of coolant can be avoided.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and more particularly to a sealing structure and bipolar plate. Background Technology

[0002] A fuel cell includes a membrane electrode assembly formed by a proton-conducting membrane, with an anode on one side and a cathode on the other. In a fuel cell device, multiple fuel cells are typically linearly combined to form a fuel cell stack to achieve a sufficiently large power output.

[0003] The bipolar plate disclosed in patent document CN219260218U includes a body with a first surface and a second surface in the thickness direction. A recessed area and an outer frame area are formed on the first surface and the second surface. The recessed area is located in the outer frame area. In use, the recessed areas on both sides will form an anode cavity and a cathode cavity by dividing the other layers of the electrolytic cell. Anode gas and cathode gas can enter the cathode cavity and anode cavity through the vent holes in the outer frame area, and then an electrolytic reaction will occur in the cathode cavity and anode cavity.

[0004] Although existing bipolar plates allow ventilation to the anode and cathode chambers through vent holes, the poor sealing performance of these bipolar plates means that water generated during electrolysis can easily enter the vent holes, posing a risk of water and gas cross-contamination. Summary of the Invention

[0005] In view of this, it is necessary to provide a sealing structure and bipolar plate to solve the technical problem that the existing bipolar plate structure has poor sealing performance and is prone to water and air cross-contamination.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a sealing structure, including an anode seal and a cathode seal, wherein the anode seal and the cathode seal are sealed together, and a spaced-apart air cavity and a coolant flow channel are formed between them.

[0007] The anode seal is provided with an anode mounting port and an anode vent. The anode mounting port is used for mounting the anode flow field plate. The anode vent is located on the side of the anode seal away from the cathode seal and communicates with the vent chamber.

[0008] The cathode seal is provided with a cathode mounting port and a cathode vent. The cathode mounting port is used for mounting the cathode flow field plate, and the cathode vent is located on the side of the cathode seal away from the anode seal and communicates with the vent cavity.

[0009] Furthermore, each of the anode pores and the cathode pores is provided with a plurality of pores, and the anode pores and the cathode pores are evenly spaced apart.

[0010] Furthermore, the side of the anode seal facing away from the cathode seal is provided with a plurality of evenly spaced anode gas equalization strips, and each anode vent is respectively disposed between each anode gas equalization strip.

[0011] Furthermore, the cathode seal has a plurality of uniformly spaced cathode gas equalization strips on the side facing away from the anode seal, and each cathode vent is respectively disposed between each cathode gas equalization strip.

[0012] Furthermore, the air cavity is provided with a plurality of evenly spaced first spacers, each of which divides the air cavity into a plurality of sub-cavities.

[0013] Furthermore, each of the anode vents and each of the cathode vents are respectively connected to each of the sub-cavities.

[0014] Furthermore, the coolant flow channel is provided with a plurality of evenly spaced second spacers, each of which divides the coolant flow channel into a plurality of coolant sub-flow channels.

[0015] Furthermore, an anode sealing groove is provided around the anode mounting port, which is used for mounting the anode flow field plate.

[0016] Furthermore, a cathode sealing groove is provided around the cathode mounting port, which is used for mounting the cathode flow field plate.

[0017] The technical solution of the present invention also provides a bipolar plate, including an anode flow field plate, a cathode flow field plate and the above-mentioned sealing structure. The anode flow field plate is installed at the anode mounting port, the cathode flow field plate is installed at the cathode mounting port, and a coolant cavity is formed between the anode flow field plate and the cathode flow field plate. The coolant cavity is connected to the coolant flow channel.

[0018] Compared with the prior art, the beneficial effects of the sealing structure and bipolar plate of the present invention include: the sealing structure includes an anode seal and a cathode seal, the anode seal and the cathode seal are respectively provided with an anode mounting port and a cathode mounting port, the anode flow field plate can form an anode plate structure by being installed in the anode mounting port, the cathode flow field plate can form a cathode plate structure by being installed in the cathode mounting port, the anode seal and the cathode seal are sealed together to form a bipolar plate structure with the periphery sealed by the sealing structure, the air cavity formed between the anode seal and the cathode seal can accommodate cathode gas and anode gas, the coolant flow channel between the anode seal and the cathode seal can allow coolant to pass through, since the air cavity and the coolant flow channel are set inside the anode seal and the cathode seal and are spaced apart, the water and gas cross-contamination between the air cavity and the coolant flow channel can be effectively avoided;

[0019] The anode and cathode seals are respectively provided with anode vents and anode vents communicating with the gas chamber. The anode vents are located on the side of the anode seal away from the cathode seal, and the cathode vents are located on the side of the cathode seal away from the anode seal. This allows for ventilation between the anode flow field plate and the gas chamber. Since the anode vents and anode vents are respectively provided on the anode and cathode seals, anode gas and cathode gas will enter or exit the anode flow field plate and cathode flow field plate through the anode and cathode seals. The anode flow field plate and cathode flow field plate are sealed by the anode and cathode seals, thus preventing water and gas cross-contamination during the entry of anode gas and cathode gas and the exit of coolant. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sealing structure provided in an embodiment of the present invention;

[0021] Figure 2 This is another structural schematic diagram of the sealing structure provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the bipolar plate provided in an embodiment of the present invention;

[0023] Figure 4 This is a top view of the bipolar plate provided in an embodiment of the present invention;

[0024] Figure 5 It is along Figure 4 Sectional view of line AA in the middle;

[0025] Figure 6 yes Figure 5 A magnified view of a section at point A in the middle;

[0026] Figure 7 yes Figure 5 A magnified view of a section at point B in the middle;

[0027] Figure 8 It is along Figure 4 Sectional view of the middle BB line;

[0028] Figure 9 It is along Figure 4 Sectional view of the CC line.

[0029] The following are the labeling elements in the figure:

[0030] 10—Anode seal; 11—Anode mounting port; 12—Anode vent.

[0031] 13—First double-line sealing strip; 14—Anode gas equalization strip; 15—Second double-line sealing strip

[0032] 20—Cathode seal; 21—Cathode mounting port; 22—Cathode vent.

[0033] 23—Cathode gas distribution bar; 24—Sealing protrusion; 30—Coolant flow channel

[0034] 31—Inlet channel; 32—Outlet channel; 33—Second spacer bar

[0035] 40—Gas chamber; 41—Anode inlet chamber; 42—Anode outlet chamber

[0036] 43—Cathode inlet chamber; 44—Cathode outlet chamber; 45—First spacer bar

[0037] 51—Anode inlet 52—Anode outlet 53—Cathode inlet

[0038] 54—Cathode outlet; 55—Liquid inlet; 56—Liquid outlet

[0039] 60—Anode flow field plate; 61—Coolant chamber; 70—Cathode flow field plate

[0040] 111—Anode sealing groove; 121—Anode air inlet; 122—Anode air outlet.

[0041] 211—Cathode sealing groove; 221—Cathode air inlet; 222—Cathode air outlet. Detailed Implementation

[0042] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0043] This invention provides a sealing structure and a bipolar plate. The bipolar plate sets up a gas channel and a liquid channel in the sealing structure. Through the sealing characteristics of the sealing structure, the gas channel and the liquid channel are effectively separated, thereby avoiding water and gas crosstalk in the bipolar plate. This solves the technical problem that the existing bipolar plate structures have poor sealing performance and are prone to water and gas crosstalk.

[0044] To achieve the above-mentioned technical objectives, the present invention provides a sealing structure, such as... Figure 1-9As shown, it includes an anode seal 10 and a cathode seal 20, which are sealed together and form a coolant flow channel 30 and a gas cavity 40 spaced apart from the cathode seal 20. The anode seal 10 is provided with an anode mounting port 11 and an anode vent 12. The anode mounting port 11 is used for mounting an anode flow field plate 60, and the anode vent 12 is located on the side of the anode seal 10 away from the cathode seal 20 and communicates with the gas cavity 40. The cathode seal 20 is provided with a cathode mounting port 21 and a cathode vent 22. The cathode mounting port 21 is used for mounting a cathode flow field plate 70, and the cathode vent 22 is located on the side of the cathode seal 20 away from the anode seal 10 and communicates with the gas cavity 40.

[0045] Specifically, the sealing structure includes an anode seal 10 and a cathode seal 20. The anode seal 10 and the cathode seal 20 are respectively provided with an anode mounting port 11 and a cathode mounting port 21. The anode flow field plate 60 can form an anode plate structure by being installed in the anode mounting port 11, and the cathode flow field plate 70 can form a cathode plate structure by being installed in the cathode mounting port 21. The anode seal 10 and the cathode seal 20 are sealed together to form a bipolar plate structure that is sealed on the periphery by the sealing structure. A spaced-apart air cavity 40 and a coolant flow channel 30 are formed between the anode seal 10 and the cathode seal 20. The air cavity 40 can contain cathode gas and anode gas. The coolant flow channel 30 is connected to the coolant cavity 61 between the anode flow field plate 60 and the cathode flow field plate 70, allowing coolant to pass through. Since the air cavity 40 and the coolant flow channel 30 are located inside the anode seal 10 and the cathode seal 20 and are spaced apart, water and gas cross-contamination between the air cavity 40 and the coolant flow channel 30 can be effectively avoided.

[0046] The anode seal 10 and cathode seal 20 are respectively provided with anode vents 12 and anode vent 22 communicating with the gas chamber 40. The anode vent 12 is located on the side of the anode seal 10 away from the cathode seal 20, and the cathode vent 22 is located on the side of the cathode seal 20 away from the anode seal 10. This allows for ventilation between the anode flow field plate 60 and the cathode flow field plate 70 and the gas chamber 40. Since the anode vents 12 and anode vent 22 are respectively provided on the anode seal 10 and the cathode seal 20, the anode gas and cathode gas will enter or exit the anode flow field plate 60 and the cathode flow field plate 70 through the anode seal 10 and the cathode seal 20. The anode flow field plate 60 and the cathode flow field plate 70 are sealed by the anode seal 10 and the cathode seal 20, thus preventing water and gas cross-contamination during the entry of anode gas and cathode gas and the exit of coolant.

[0047] In this embodiment, the anode seal 10 and the cathode seal 20 are made of EPDM or fluororubber, silicone rubber or other materials with a Shore hardness of 50-70. The sealing structure formed by the above materials can achieve efficient sealing of the part where the anode seal 10 and the cathode seal 20 are in contact with each other. Therefore, the sealing structure formed by the contact of the anode seal 10 and the cathode seal 20 on the periphery of the air cavity 40 and the coolant flow channel 30 can effectively ensure the sealing of the air cavity 40 and the coolant flow, thereby avoiding water and air cross-contamination between the air cavity 40 and the coolant flow channel 30.

[0048] Understandably, the anode seal 10 and / or the cathode seal 20 can form an air cavity 40 by providing a side-opening groove structure on the surface, so that the anode seal 10 and the cathode seal 20 fit together.

[0049] Understandably, the anode seal 10 and / or cathode seal 20 can be provided with a groove structure with an open end on their surface, so that the anode seal 10 and cathode seal 20 can be fitted together to form a coolant flow channel 30 with an open end. This open end allows coolant to enter or exit the coolant chamber 61 of the anode flow field plate 60 and the cathode flow field plate 70.

[0050] In this embodiment, as Figure 1-9 As shown, the coolant flow channel 30 includes an inlet flow channel 31 and an outlet flow channel 32. The air chamber 40 includes an anode air inlet chamber 41, an anode air outlet chamber 42, a cathode air inlet chamber 43, and a cathode air outlet chamber 44. The anode air inlet chamber 41, the cathode air inlet chamber 43, and the inlet flow channel 31 are located at one end of the sealed structure and are spaced apart from each other. The anode air outlet chamber 42, the cathode air outlet chamber 44, and the outlet flow channel 32 are located at the other end of the sealed structure and are spaced apart from each other. The anode air inlet chamber 41, the anode air outlet chamber 42, and the cathode air inlet chamber 44 are located at the other end of the sealed structure and are spaced apart from each other. The cavity 43, cathode outlet cavity 44, liquid inlet channel 31 and liquid outlet channel 32 are set in a sealed structure, which can effectively ensure the mutual sealing of the anode inlet cavity 41, anode outlet cavity 42, cathode inlet cavity 43, cathode outlet cavity 44, liquid inlet channel 31 and liquid outlet channel 32, and avoid water vapor cross-contamination between anode gas, cathode gas and coolant in the anode inlet cavity 41, anode outlet cavity 42, cathode inlet cavity 43, cathode outlet cavity 44, liquid inlet channel 31 and liquid outlet channel 32.

[0051] In this embodiment, as Figure 1-9As shown, the anode seal 10 and the cathode seal 20 are provided with an anode inlet 51, an anode outlet 52, a cathode inlet 53, a cathode outlet 54, a liquid inlet 55, and a liquid outlet 56. The anode inlet 51, the cathode inlet 53, and the liquid inlet 55 are located at one end of the anode seal 10 and the cathode seal 20 and are respectively connected to the anode inlet chamber 41, the cathode inlet chamber 43, and the liquid inlet channel 31, allowing anode gas, cathode gas, and coolant to pass through the anode inlet chamber 41, the cathode inlet chamber 43, and the liquid inlet channel 31, respectively. The anode outlet 52, the cathode outlet 54, and the liquid outlet 56 are located at the other end of the anode seal 10 and the cathode seal 20 and are respectively connected to the anode outlet chamber 42, the cathode outlet chamber 44, and the liquid outlet channel 32, allowing anode gas, cathode gas, and coolant to pass out of the anode outlet chamber 42, the cathode outlet chamber 44, and the liquid outlet channel 32, respectively.

[0052] In this embodiment, as Figure 1-9 As shown, the anode vent 12 includes an anode inlet 121 and an anode outlet 122. The anode inlet 121 is connected to the anode inlet chamber 41, and the anode outlet 122 is connected to the anode outlet chamber 42. The cathode vent 22 includes a cathode inlet 221 and a cathode outlet 222. The cathode inlet 221 is connected to the cathode inlet chamber 43, and the cathode outlet 222 is connected to the cathode outlet chamber 44.

[0053] With the above structure, when the bipolar plates are working, the anode gas enters the anode inlet chamber 41 through the anode inlet 51, and then enters the outer side of the anode flow field plate 60 through the anode inlet hole 121 to participate in the fuel cell reaction. The unreacted gas enters the anode outlet chamber 42 through the anode outlet 52, and then exits from the anode outlet 52. The cathode gas enters the cathode inlet chamber 43 through the cathode inlet 53, and then enters the outer side of the cathode flow field plate 70 through the cathode inlet hole 221 to participate in the fuel cell reaction. The unreacted gas enters the cathode outlet chamber 44 through the cathode outlet 54, and then exits from the cathode outlet 54. The coolant enters the inlet channel 31 through the inlet 55, and then enters the coolant chamber 61 between the anode flow field plate 60 and the cathode flow field plate 70 through the inlet channel 31, carrying away the heat of the anode flow field plate 60 and the cathode flow field plate 70 to cool the fuel cell. Then it enters the outlet channel 32 and finally exits from the outlet 56.

[0054] In this embodiment, by setting the anode air inlet chamber 41, anode air outlet chamber 42, cathode air inlet chamber 43, cathode air outlet chamber 44, liquid inlet channel 31 and liquid outlet channel 32, anode air inlet 51, anode air outlet 52, cathode air inlet 53, cathode air outlet 54, liquid inlet 55, liquid outlet 56, anode air inlet hole 121, anode air outlet hole 122, cathode air inlet hole 221 and cathode air outlet hole 222 in a sealed structure, water and air can be prevented from crossing each other, while also facilitating the processing of the bipolar plate and reducing the production cost of the bipolar plate.

[0055] In this embodiment, as Figure 4-9 As shown, a first double-line sealing strip 13 is provided on the side of the anode seal 10 near the cathode seal 20. The outer ring of the first double-line sealing strip 13 is located around the anode seal 10, and part of the inner ring of the first double-line sealing strip 13 is located inside the outer ring. The other part surrounds two spaced-apart groove structures at both ends of the anode seal 10. The anode seal 10 is attached to the cathode seal 20 through the first double-line sealing strip 13. The two grooves at one end form an anode air inlet chamber 41 and a cathode air inlet chamber 42 between the two grooves and the cathode seal 20. The gas chamber 43 has a liquid inlet channel 31 formed between the two tanks and the cathode seal 20. The two tanks at the other end form an anode gas outlet chamber 42 and a cathode gas outlet chamber 44 between the cathode seal 20. The liquid outlet channel 32 is formed between the two tanks and the cathode seal 20. The sealing between the first double-line sealing strip 13 and the cathode seal 20 can effectively ensure the sealing between the anode gas inlet chamber 41, the anode gas outlet chamber 42, the cathode gas inlet chamber 43, the cathode gas outlet chamber 44, the liquid inlet channel 31, and the liquid outlet channel 32.

[0056] In one embodiment, such as Figure 1-9 As shown, a plurality of anode vents 12 and cathode vents 22 are provided, and the anode vents 12 and cathode vents 22 are evenly spaced. Specifically, by setting a plurality of anode vents 12 and cathode vents 22 evenly arranged, the anode gas and cathode gas entering the anode flow field plate 60 and cathode flow field plate 70 can be uniformly distributed, and the anode gas and cathode gas can be conveniently discharged from the anode flow field plate 60 and cathode flow field plate 70.

[0057] In this embodiment, the anode inlet 121, the anode outlet 122, the cathode inlet 221, and the cathode outlet 222 are all provided with several evenly spaced holes.

[0058] In one embodiment, such as Figure 1-9 As shown, a plurality of evenly spaced anode gas equalization strips 14 are provided on one side of the anode seal 10 opposite to the cathode seal 20, and each anode gas hole 12 is respectively disposed between each anode gas equalization strip 14. Specifically, the anode gas equalization strips 14 can prevent diffusion from each anode gas hole 12 to the periphery, and the anode gas equalization strips 14 can be connected to each flow channel of the anode flow field plate 60, thereby ensuring uniform gas flow in each flow channel of the anode flow field plate 60.

[0059] In this embodiment, the anode gas distribution bar 14 is disposed in the anode inlet chamber 41 and the anode outlet chamber 42.

[0060] In one embodiment, such as Figure 1-9As shown, a plurality of uniformly spaced cathode gas equalization strips 23 are provided on the side of the cathode seal 20 opposite to the anode seal 10, and each cathode vent 22 is respectively disposed between the cathode gas equalization strips 23. Specifically, the cathode gas equalization strips 23 can prevent diffusion from each cathode vent 22 to the periphery, and the cathode gas equalization strips 23 can be connected to each flow channel of the cathode flow field plate 70, thereby ensuring uniform gas flow in each flow channel of the cathode flow field plate 70.

[0061] In this embodiment, the cathode gas distribution bar 23 is disposed in the cathode air inlet chamber 43 and the cathode air outlet chamber 44.

[0062] In one embodiment, such as Figure 4-6 As shown in Figure 9, the gas cavity 40 is provided with a plurality of uniformly spaced first spacers 45, each first spacer 45 dividing the gas cavity 40 into a plurality of sub-cavities. Specifically, the first spacers 45, through the formed sub-cavities, can uniformly distribute the gas in the gas cavity 40, thereby ensuring uniform gas flow in each channel of the cathode flow field plate 70.

[0063] In this embodiment, as Figure 4-6 As shown in Figure 9, the first spacer 45 is disposed in the anode inlet chamber 41, the anode outlet chamber 42, the cathode inlet chamber 43, and the cathode outlet chamber 44, which can uniformly distribute the anode gas and the cathode gas in the anode inlet chamber 41, the anode outlet chamber 42, the cathode inlet chamber 43, and the cathode outlet chamber 44.

[0064] In this embodiment, as Figure 4-6 As shown in Figure 9, the height of the first spacer 45 is flush with the height of the first double-line sealing strip 13, and can fit against the inner side of the cathode seal 20.

[0065] In one embodiment, such as Figure 4-6 As shown in Figure 9, each anode vent 12 and each cathode vent 22 is connected to each sub-cavity. Specifically, the connection between each anode vent 12 and each cathode vent 22 and each sub-cavity ensures uniform gas intake and exhaust, thereby ensuring uniform gas flow in each channel of the cathode flow field plate 70.

[0066] In one embodiment, such as Figure 4-6 As shown in Figure 9, the coolant flow channel 30 is provided with a plurality of evenly spaced second spacers 33, each second spacer 33 dividing the coolant flow channel 30 into a plurality of coolant sub-flow channels. Specifically, the coolant sub-flow channels formed by the separation of each second spacer 33 can keep the coolant uniform, thereby enabling the coolant to diffuse evenly to all parts of the coolant cavity 61, ensuring the heat dissipation effect of the coolant.

[0067] In this embodiment, as Figure 4 , 6As shown in Figure 9, the second spacer 33 is disposed in the liquid inlet channel 31 and the liquid outlet channel 32.

[0068] In this embodiment, the height of the second spacer 33 is flush with the height of the first double-line sealing strip 13, and can fit against the inner side of the cathode seal 20.

[0069] In this embodiment, as Figure 1-9 As shown, a second double-line sealing strip 15 is provided on the side of the anode seal 10 away from the cathode seal 20. The second double-line sealing strip 15 achieves sealing with the adjacent bipolar plate by adhering to the cathode plate of the adjacent bipolar plate.

[0070] In this embodiment, as Figure 1-9 As shown, a sealing protrusion 24 is provided on the side of the cathode seal 20 away from the anode seal 10. The sealing protrusion 24 achieves sealing with the adjacent bipolar plate by adhering to the anode plate of the adjacent bipolar plate, thereby achieving efficient sealing inside the fuel cell.

[0071] In one embodiment, such as Figure 1-2 As shown in Figure 8, an anode sealing groove 111 is provided on the periphery of the anode mounting port 11. The anode sealing groove 111 is used for mounting the anode flow field plate 60. Specifically, by providing the anode sealing groove 111 on the periphery of the anode mounting port 11, the gap between the anode flow field plate 60 and the anode sealing element 10 can be effectively sealed, thereby preventing the anode gas, cathode gas and coolant from crossing through the gap between the anode flow field plate 60 and the anode sealing element 10, and improving the sealing of the bipolar plate.

[0072] In one embodiment, such as Figure 1-2 As shown in Figure 8, a cathode sealing groove 211 is provided on the periphery of the cathode mounting port 21. The cathode sealing groove 211 is used for mounting the cathode flow field plate 70. Specifically, by providing the cathode sealing groove 211 on the periphery of the cathode mounting port 21, the gap between the cathode flow field plate 70 and the cathode seal 20 can be effectively sealed, thereby preventing the anode gas, cathode gas and coolant from crossing each other through the gap between the cathode flow field plate 70 and the cathode seal 20, and improving the sealing of the bipolar plate.

[0073] like Figure 3-9 As shown, the bipolar plate provided in the embodiment of the present invention includes an anode flow field plate 60, a cathode flow field plate 70, and the sealing structure described above. The anode flow field plate 60 is installed at the anode mounting port 11, and the cathode flow field plate 70 is installed at the cathode mounting port 21. A coolant cavity 61 is formed between the anode flow field plate 60 and the cathode flow field plate 70, and the coolant cavity 61 is connected to the coolant flow channel 30.

[0074] It is understood that the bipolar plate of this embodiment can be used in any form of fuel cell, such as hydrogen fuel cells or methane fuel cells.

[0075] Specifically, by setting the above-mentioned sealing structure, the bipolar plate can achieve high-precision sealing, thereby preventing water and gas from mixing during the introduction of anode gas and cathode gas and the exit of coolant.

[0076] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A sealing structure, characterized in that, It includes an anode seal and a cathode seal, which are sealed together and form a spaced-apart air cavity and coolant flow channel between them. The anode seal is provided with an anode mounting port and an anode vent. The anode mounting port is used for mounting the anode flow field plate. The anode vent is located on the side of the anode seal away from the cathode seal and communicates with the vent chamber. The cathode seal is provided with a cathode mounting port and a cathode vent. The cathode mounting port is used for mounting the cathode flow field plate. The cathode vent is located on the side of the cathode seal away from the anode seal and communicates with the vent cavity. The anode vent and the cathode vent are each provided with a plurality of vents, and the anode vent and the cathode vent are evenly spaced apart; The air cavity is provided with a plurality of uniformly spaced first spacers, and each first spacer divides the air cavity into a plurality of sub-cavities. Each of the anode vents and each of the cathode vents are respectively connected to each of the sub-cavities; The coolant flow channel is provided with a plurality of evenly spaced second spacers, each of which divides the coolant flow channel into a plurality of coolant sub-channels.

2. The sealing structure according to claim 1, characterized in that, The anode seal has a plurality of evenly spaced anode gas equalization strips on the side facing away from the cathode seal, and each anode vent is respectively disposed between each anode gas equalization strip.

3. The sealing structure according to claim 1, characterized in that, The cathode seal has a plurality of uniformly spaced cathode gas equalization strips on the side facing away from the anode seal, and each cathode vent is disposed between the cathode gas equalization strips.

4. The sealing structure according to any one of claims 1-3, characterized in that, An anode sealing groove is provided around the anode mounting port, and the anode sealing groove is used for mounting the anode flow field plate.

5. The sealing structure according to any one of claims 1-3, characterized in that, A cathode sealing groove is provided around the cathode mounting port, and the cathode sealing groove is used for mounting the cathode flow field plate.

6. A bipolar plate, characterized in that, The device includes an anode flow field plate, a cathode flow field plate, and a sealing structure as described in any one of claims 1-5. The anode flow field plate is installed at the anode mounting port, the cathode flow field plate is installed at the cathode mounting port, and a coolant cavity is formed between the anode flow field plate and the cathode flow field plate. The coolant cavity is connected to the coolant flow channel.

Images