A bipolar plate and bipolar plate assembly

Abstract

The utility model provides a kind of bipolar plate and bipolar plate assembly, it is related to electrolytic cell technical field, the bipolar plate includes bipolar plate body and cladding piece;The bipolar plate body has reaction zone and is located at the outer circumferential portion outside the reaction zone;The cladding piece is located at the bipolar plate body, and includes anode cladding portion and cathode cladding portion, the anode cladding portion is covered and located at the anode side of the outer circumferential portion, and the cathode cladding portion is covered and located at the cathode side of the outer circumferential portion.The utility model can reduce the risk of short-circuit failure between bipolar plate.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic cell technology, and more specifically, to a bipolar plate and a bipolar plate assembly. Background Technology

[0002] In an electrolytic cell, bipolar plates play a role in gas distribution and current conduction, and are an indispensable component.

[0003] In related technologies, to facilitate the assembly of electrolytic cells, the outer periphery of the bipolar plate is often protruded beyond the outer periphery of the membrane electrode. However, this results in both bipolar plates being exposed. When there are foreign objects between them, the two bipolar plates are prone to short-circuiting and failure. Utility Model Content

[0004] The problem this invention addresses is: how to reduce the risk of short-circuit failure between bipolar plates.

[0005] To address the aforementioned problems, this utility model provides a bipolar plate and a bipolar plate assembly.

[0006] In a first aspect, the present invention provides a bipolar plate, comprising a bipolar plate body and a covering member; the bipolar plate body has a reaction zone and an outer peripheral portion disposed outside the reaction zone; the covering member is disposed on the bipolar plate body and includes an anode covering portion and a cathode covering portion, the anode covering portion covering the anode side of the outer peripheral portion, and the cathode covering portion covering the cathode side of the outer peripheral portion.

[0007] Optionally, the outer peripheral portion is provided with a positioning hole; the covering also includes an embedded portion disposed in the positioning hole, the two ends of the embedded portion being respectively connected to the anode covering portion and the cathode covering portion, and the covering has a positioning inner hole that sequentially penetrates the anode covering portion, the embedded portion and the cathode covering portion.

[0008] Optionally, the covering further includes a side enclosure portion covering the peripheral side surface of the outer periphery, with the two ends of the side enclosure portion respectively connected to the anode covering portion and the cathode covering portion.

[0009] Optionally, the outer peripheral portion is provided with a through hole; the covering also includes a filling portion disposed in the through hole, the two ends of the filling portion being respectively connected to the anode covering portion and the cathode covering portion.

[0010] Optionally, the outer periphery is provided with a through-hole extending through both sides; the covering also includes an embedded part disposed in the through-hole, the two ends of the embedded part being respectively connected to the anode covering part and the cathode covering part, and the covering is provided with a through-hole extending through the anode covering part, the embedded part and the cathode covering part in sequence.

[0011] Optionally, the anode covering portion is provided with a first anode mounting groove surrounding the connecting hole, and the bipolar plate further includes a first anode sealing ring disposed in the first anode mounting groove; the cathode covering portion is provided with a first cathode mounting groove surrounding the connecting hole, and the bipolar plate further includes a first cathode sealing ring disposed in the first cathode mounting groove.

[0012] Optionally, the reaction zone includes an anode reaction zone located on the anode side of the bipolar plate body and a cathode reaction zone located on the cathode side of the bipolar plate body; an anode clearance opening opposite to the anode reaction zone is formed in the middle of the anode covering portion, and a second anode mounting groove surrounding the anode clearance opening is provided on the anode covering portion, with a second anode sealing ring provided in the second anode mounting groove; a cathode clearance opening opposite to the cathode reaction zone is formed in the middle of the cathode covering portion, and a second cathode mounting groove surrounding the cathode clearance opening is provided on the cathode covering portion, with a second cathode sealing ring provided in the second cathode mounting groove.

[0013] Optionally, the connecting port includes an anode connecting port, and the connecting hole includes an anode connecting hole corresponding to the anode connecting port. The outer peripheral portion is provided with a first through hole that penetrates both sides and is located between the anode connecting port and the anode reaction zone. The cathode covering portion is provided with a first cathode flow channel that is respectively connected to the anode connecting hole and the first through hole. The anode covering portion is provided with a first anode flow channel that is respectively connected to the first through hole and the anode clearance port. The anode connecting hole is connected to the anode clearance port in sequence through the first cathode flow channel, the first through hole, and the first anode flow channel.

[0014] Optionally, the anode covering portion is provided with a groove located between the first through hole and the anode clearance opening; the bipolar plate further includes an insert disposed in the groove, the insert having a flow channel groove on the side facing the bipolar plate body, and the bipolar plate body sealing the opening of the flow channel groove to form the first anode flow channel.

[0015] Optionally, the sidewall of the groove is provided with a recess, and the insert is provided with a protrusion that engages with the recess.

[0016] Optionally, the communication port includes a cathode communication port, the communication hole includes a cathode communication hole corresponding to the cathode communication port, and the outer peripheral portion is provided with a second through hole that penetrates both sides and is located between the cathode communication port and the cathode reaction zone; the anode covering portion is provided with a second anode flow channel that is respectively connected to the cathode communication hole and the second through hole, and the cathode covering portion is provided with a second cathode flow channel that is respectively connected to the second through hole and the cathode clearance port; the cathode communication hole is connected to the cathode clearance port in sequence through the second anode flow channel, the second through hole, and the second cathode flow channel.

[0017] Secondly, this utility model provides a bipolar plate assembly, including multiple bipolar plates as described above, wherein the multiple bipolar plates are stacked sequentially, and in any two adjacent bipolar plates, one bipolar plate is rotated 180° relative to the other bipolar plate around its center point.

[0018] The beneficial effects of the bipolar plate of this utility model are: by covering the anode side of the outer periphery with the anode covering part and the cathode covering part of the outer periphery with the cathode covering part, the anode side and cathode side of the outer periphery can be covered, which can achieve the effect of insulation and avoid short circuit between the outer periphery of the two bipolar plates due to the presence of foreign objects, thereby reducing the risk of short circuit failure between the bipolar plates. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the bipolar plate in an embodiment of the present invention from the cathode side view.

[0020] Figure 2 This is a schematic diagram of the cathode side of the bipolar plate body in an embodiment of the present invention;

[0021] Figure 3 for Figure 1 Cross-sectional view of the bipolar plate along line AA;

[0022] Figure 4 for Figure 1 Cross-sectional view of the bipolar plate along line BB;

[0023] Figure 5 for Figure 3 Enlarged schematic diagram of part a of the bipolar plate;

[0024] Figure 6 This is a three-dimensional structural diagram of the bipolar plate in an embodiment of the present invention from the anode side view.

[0025] Figure 7 This is a schematic diagram of the anode side of the bipolar plate body according to an embodiment of the present invention;

[0026] Figure 8 for Figure 1 Enlarged schematic diagram of part b of the bipolar plate;

[0027] Figure 9 for Figure 6 Enlarged schematic diagram of part c of the bipolar plate;

[0028] Figure 10 This is a schematic diagram of the cathode side of the bipolar plate body in one of the communication port schemes according to an embodiment of the present utility model;

[0029] Figure 11 for Figure 6Enlarged schematic diagram of the bipolar plate after the insert is removed at point c;

[0030] Figure 12 This is a schematic diagram of the structure of the insert in an embodiment of the present utility model;

[0031] Figure 13 for Figure 1 Enlarged schematic diagram of a portion d of the bipolar plate;

[0032] Figure 14 for Figure 6 Enlarged schematic diagram of part e of the bipolar plate;

[0033] Figure 15 This is a schematic diagram of the cathode side of the bipolar plate body in another communication port scheme according to an embodiment of this utility model;

[0034] Figure 16 An exploded view of the bipolar plate assembly according to an embodiment of this utility model.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10. Bipolar plate; 11. Bipolar plate body; 111. Outer periphery; 1111. Positioning hole; 1112. Through hole group; 1112a. Through hole; 1113. Connecting port; 1114. Anode connecting port; 1114a. Anode inlet; 1114b. Anode outlet; 1115. Cathode connecting port; 1115a. Gas outlet; 1115b. Cathode inlet; 1115c. Cathode outlet; 1116. Liquid connecting port; 1116a, First liquid connection port; 1116b, Second liquid connection port; 1116c, Third liquid connection port; 1116d, Fourth liquid connection port; 1116e, Fifth liquid connection port; 1117, First through hole; 1118, Second through hole; 112, Cathode reaction zone; 113, Anode reaction zone; 12, Covering component; 121, Anode covering part; 1211, First anode mounting groove; 1212, Anode clearance. 1213. Second anode mounting groove; 1214. First anode flow channel; 1215. Embedded groove; 1215a. Recess; 1216. Second anode flow channel; 122. Cathode covering part; 1221. First cathode mounting groove; 1222. Cathode clearance opening; 1223. Second cathode mounting groove; 1224. First cathode flow channel; 1225. Second cathode flow channel; 123. Embedded part; 1231. Positioning inner hole; 124. 125. Side enclosure; 126. Filling part; 126. Embedding part; 1261. Connecting hole; 1261a. Anode connecting hole; 1261b. Cathode connecting hole; 13. First anode sealing ring; 14. First cathode sealing ring; 15. Second anode sealing ring; 16. Second cathode sealing ring; 17. Insert; 171. Flow channel groove; 172. Protrusion; 18. First inspection part; 19. Second inspection part; L. Connecting line; 20. Membrane electrode. Detailed Implementation

[0037] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0038] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis representing up and the negative direction representing down. The X-axis represents the horizontal direction and is designated as the front and back position, with the positive direction of the X-axis representing the front and the negative direction representing the back. The Y-axis represents the left and right position, with the positive direction of the Y-axis representing the left and the negative direction representing the right. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0040] It should be noted that the terms "one" and "more" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one" or "two or more".

[0041] This invention provides a bipolar plate and a bipolar plate assembly to reduce the risk of short-circuit failure between bipolar plates. Detailed description follows with reference to specific embodiments.

[0042] like Figures 1 to 3As shown in the figure, a bipolar plate 10 provided in this embodiment of the present invention includes a bipolar plate body 11 and a covering member 12; the bipolar plate body 11 has a reaction zone and an outer peripheral portion 111 disposed outside the reaction zone; the covering member 12 is disposed on the bipolar plate body 11 and includes an anode covering portion 121 and a cathode covering portion 122, the anode covering portion 121 covering the anode side of the outer peripheral portion 111, and the cathode covering portion 122 covering the cathode side of the outer peripheral portion 111.

[0043] It should be noted that the bipolar plate body 11 typically has a central region, with reaction zones on the anode and cathode sides of the central region, specifically including an anode reaction zone 113 on the anode side and a cathode reaction zone 112 on the cathode side. The outer periphery 111 comprises the remaining parts of the bipolar plate body 11 excluding the central region, as detailed in [reference needed]. Figure 2 , Figure 2 This is a schematic diagram of the cathode side of the bipolar plate body 11. The portion containing the cathode reaction region 112 is the central region of the bipolar plate body 11, and the portion outside the cathode reaction region 112 corresponds to the outer periphery 111 of the bipolar plate body 11. Furthermore, the covering 12 can be formed by injection molding an injection molding material onto the bipolar plate body 11; there are no limitations on this method. Moreover, the material of the covering 12 can be an insulating material, such as PPSU, PSU, PPS, or other plastics.

[0044] In this embodiment, by covering the anode coating portion 121 on the anode side of the outer peripheral portion 111 and covering the cathode coating portion 122 on the cathode side of the outer peripheral portion 111, the anode and cathode sides of the outer peripheral portion 111 can be coated, which has an insulating effect and prevents short circuits between the outer peripheral portions 111 of the two bipolar plates 10 due to the presence of foreign objects, thereby reducing the risk of short circuit failure between the bipolar plates 10.

[0045] Optionally, such as Figure 2 and Figure 4 As shown, the outer peripheral portion 111 is provided with a positioning hole 1111; the covering member 12 also includes an embedded portion 123 disposed in the positioning hole 1111, the two ends of the embedded portion 123 are respectively connected to the anode covering portion 121 and the cathode covering portion 122, and the covering member 12 is provided with a positioning inner hole 1231 that passes through the anode covering portion 121, the embedded portion 123 and the cathode covering portion 122 in sequence.

[0046] It should be noted that the outer peripheral portion 111 is usually provided with positioning holes 1111, and the membrane electrode 20 between the two bipolar plates 10 is also usually provided with positioning holes 1111. The bipolar plates 10 and the membrane electrode 20 can be coaxial with the positioning holes 1111 to ensure their relative positions.

[0047] In this optional embodiment, the embedded portion 123 is formed in the positioning hole 1111 and is connected to the anode covering portion 121 and the cathode covering portion 122 respectively. This allows the material of the covering portion 12 to penetrate the entire bipolar plate body 11, forming a mechanical interlocking effect. This enhances the adhesion between the covering portion 12 and the bipolar plate body 11, thereby improving the overall structural stability of the bipolar plate 10. At the same time, the embedded portion 123 in the positioning hole 1111 can also cover the inner wall of the positioning hole 1111, thereby further improving the insulation effect. In addition, the positioning inner hole 1231 passes through the anode covering portion 121, the embedded portion 123 and the cathode covering portion 122 in sequence, and can replace the positioning hole 1111 to play a positioning role, ensuring the assembly accuracy of the bipolar plate 10 and the membrane electrode 20.

[0048] Optionally, such as Figure 4 As shown, the covering 12 also includes a side circumference portion 124 covering the peripheral side surface of the outer peripheral portion 111, and the two ends of the side circumference portion 124 are respectively connected to the anode covering portion 121 and the cathode covering portion 122.

[0049] In this optional embodiment, by covering the peripheral side surface of the outer peripheral portion 111 with the side circumference portion 124 and connecting the anode covering portion 121 and the cathode covering portion 122 respectively, the peripheral side surface of the outer peripheral portion 111 can be covered, thereby further improving the insulation effect.

[0050] Optionally, such as Figure 2 and Figure 5 As shown, the outer peripheral portion 111 is provided with a through hole 1112a; the covering member 12 also includes a filling portion 125 disposed in the through hole 1112a, and the two ends of the filling portion 125 are respectively connected to the anode covering portion 121 and the cathode covering portion 122.

[0051] In this optional embodiment, by providing the filling portion 125 in the through hole 1112a and connecting the anode coating portion 121 and the cathode coating portion 122 respectively, the filling portion 125 can establish a connection between the anode coating portion 121 and the cathode coating portion 122. This is beneficial to enhance the adhesion between the coating member 12 and the bipolar plate body 11 and improve the overall stability of the bipolar plate 10 structure.

[0052] Optionally, such as Figure 2 As shown, a plurality of through holes 1112a are provided, and the plurality of through holes 1112a are arranged sequentially at intervals on the outer peripheral portion 111 along the direction from the center of the bipolar plate body 11 to the edge. A filling portion 125 is provided in each of the plurality of through holes 1112a.

[0053] Among them, "multiple" can be two or more.

[0054] In this optional embodiment, by sequentially arranging multiple through holes 1112a along the direction from the center to the edge of the bipolar plate body 11, it means that there are multiple filling portions 125 sequentially between the anode covering portion 121 and the cathode covering portion 122 along the direction from the center to the edge of the bipolar plate body 11. Thus, multiple connection relationships can be formed between the anode covering portion 121 and the cathode covering portion 122 sequentially arranged along the direction from the center to the edge of the bipolar plate body 11. This is beneficial to further enhance the adhesion between the covering member 12 and the bipolar plate body 11.

[0055] It should be noted that, as Figure 2 As shown, the multiple through holes 1112a are referred to as through hole groups 1112. Multiple through hole groups 1112 can be provided on the outer peripheral portion 111, and the multiple through hole groups 1112 are arranged around the center of the bipolar plate body 11. This means that there are multiple sets of filling portions 125 sequentially between the anode covering portion 121 and the cathode covering portion 122 along the direction surrounding the center of the bipolar plate body 11, which can form multiple sets of connection relationships around the center of the bipolar plate body 11 between the anode covering portion 121 and the cathode covering portion 122, thereby improving the adhesion between the covering 12 and the bipolar plate body 11.

[0056] Optionally, such as Figure 2 As shown, the outer peripheral portion 111 is provided with a connecting port 1113 that extends through both sides of it; the connecting line L of the plurality of through holes 1112a passes through the connecting port 1113.

[0057] In this optional embodiment, by having the connecting line L of the multiple through holes 1112a pass through the communication port 1113, the arrangement direction of the corresponding multiple filling parts 125 will also pass through the communication port 1113, which can ensure the adhesion between the covering 12 and the bipolar plate body 11 near the communication port 1113, and help prevent fluid leakage at the communication port 1113.

[0058] Optionally, such as Figure 2 and Figure 5 As shown, the outer peripheral portion 111 is provided with a connecting port 1113 penetrating both sides therethrough; the covering member 12 also includes an embedding portion 126 disposed in the connecting port 1113, the two ends of the embedding portion 126 being connected to the anode covering portion 121 and the cathode covering portion 122 respectively, and the covering member 12 is provided with a connecting hole 1261 that sequentially penetrates the anode covering portion 121, the embedding portion 126 and the cathode covering portion 122.

[0059] It should be noted that this can be referred to Figure 10The outer periphery 111 typically has a connecting port 1113, which may include an anode connecting port 1114, a cathode connecting port 1115, and a liquid-passing connecting port 1116. The anode connecting port 1114 can communicate with the anode reaction zone 113 of the bipolar plate body 11, allowing the flow of anolyte fluid between the anode connecting port 1114 and the anode reaction zone 113 to promote the reaction at the anode reaction zone 113. The cathode connecting port 1115 can communicate with the cathode reaction zone 112 of the bipolar plate body 11, allowing the flow of cathode fluid between the cathode connecting port 1115 and the cathode reaction zone 112 to promote the reaction at the cathode reaction zone 112. The liquid-passing connecting port 1116 may not be connected to either the anode reaction zone 113 or the cathode reaction zone 112, and serves to guide fluid from this bipolar plate to the next bipolar plate. Specifically, as shown... Figure 2 As shown, there are 12 connecting ports 1113 around the bipolar plate body 11, and correspondingly, there are also 12 connecting holes 1261.

[0060] In this optional embodiment, the connecting hole 1261 sequentially penetrates the anode covering portion 121, the embedded portion 126 and the cathode covering portion 122, and can replace the connecting port 1113 to allow fluid to pass through; in addition, the embedded portion 126 is formed in the connecting port 1113 and connects the anode covering portion 121 and the cathode covering portion 122 respectively, which can improve the adhesion between the covering member 12 and the bipolar plate body 11.

[0061] Optionally, such as Figure 6 and Figure 9 As shown, the anode covering portion 121 is provided with a first anode mounting groove 1211 surrounding the connecting hole 1261, and the bipolar plate 10 further includes a first anode sealing ring 13 disposed in the first anode mounting groove 1211; Figure 1 and Figure 8 As shown, the cathode covering part 122 is provided with a first cathode mounting groove 1221 surrounding the connecting hole 1261, and the bipolar plate 10 also includes a first cathode sealing ring 14 provided in the first cathode mounting groove 1221.

[0062] Specifically, such as Figure 1 As shown, there are 12 connecting holes 1261 around the bipolar plate body 11. Correspondingly, there are 12 first anode mounting grooves 1211, first anode sealing rings 13, first cathode mounting grooves 1221, and first cathode sealing rings 14.

[0063] In this optional embodiment, the first anode mounting groove 1211 can be used to install the first anode sealing ring 13, thereby using the first anode sealing ring 13 to surround the opening of the connecting hole 1261 on the anode side to seal the anode side of the connecting hole 1261; at the same time, the first anode mounting groove 1211 is part of the anode covering part 121, so it can be injection molded at the same time as the covering part 12. Compared with opening the first anode mounting groove 1211 on the bipolar plate body 11 for the first anode sealing ring 13 to be installed, the processing difficulty is lower. The first cathode mounting groove 1221 can be used to install the first cathode sealing ring 14, thereby using the first cathode sealing ring 14 to surround the opening of the connecting hole 1261 on the cathode side to seal the cathode side of the connecting hole 1261; at the same time, the first cathode mounting groove 1221 is part of the cathode covering part 122, so it can be injection molded at the same time as the covering part 12. Compared with opening the first cathode mounting groove 1221 on the bipolar plate body 11 for the first cathode sealing ring 14 to be installed, the processing difficulty is lower.

[0064] Optionally, such as Figure 1 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the reaction zone includes an anode reaction zone 113 located on the anode side of the bipolar plate body 11 and a cathode reaction zone 112 located on the cathode side of the bipolar plate body 11; an anode clearance opening 1212 opposite to the anode reaction zone 113 is formed in the middle of the anode covering portion 121, and a second anode mounting groove 1213 surrounding the anode clearance opening 1212 is provided on the anode covering portion 1211, and a second anode sealing ring 15 is provided in the second anode mounting groove 1213; a cathode clearance opening 1222 opposite to the cathode reaction zone 112 is formed in the middle of the cathode covering portion 122, and a second cathode mounting groove 1223 surrounding the cathode clearance opening 1222 is provided on the cathode covering portion 1222, and a second cathode sealing ring 16 is provided in the second cathode mounting groove 1223.

[0065] It should be noted that the anode clearance port 1212 being opposite to the anode reaction zone 113 means that the anode clearance port 1212 and the anode reaction zone 113 are arranged opposite to each other in the thickness direction of the bipolar plate body 11, and the cathode clearance port 1222 being opposite to the cathode reaction zone 112 means that the cathode clearance port 1222 and the cathode reaction zone 112 are arranged opposite to each other in the thickness direction of the bipolar plate body 11.

[0066] In this optional embodiment, fluid can easily enter the anode reaction zone 113 through the anode clearance port 1212, or fluid can flow out of the anode reaction zone 113 through the anode clearance port 1212; fluid can easily flow out of the cathode reaction zone 112 through the cathode clearance port 1222; the second anode mounting groove 1213 can accommodate the installation of the second anode sealing ring 15, thereby enabling the second anode sealing ring 15 to surround and seal the anode clearance port 1212; simultaneously, the second anode mounting groove 1213 serves as part of the anode covering portion 121, thereby allowing the covering portion 121 to be mounted on the anode. The second cathode mounting groove 1223 is injection molded simultaneously during injection molding, which is less difficult to manufacture than opening a second anode mounting groove 1213 on the bipolar plate body 11 for the installation of the second anode sealing ring 15. The second cathode mounting groove 1223 can be used to install the second cathode sealing ring 16, thereby using the second cathode sealing ring 16 to surround the cathode clearance opening 1222 and seal the cathode clearance opening 1222. At the same time, the second cathode mounting groove 1223 is part of the cathode covering part 122, so it can be injection molded simultaneously during the injection molding of the covering part 12. This is less difficult to manufacture than opening a second cathode mounting groove 1223 on the bipolar plate body 11 for the installation of the second cathode sealing ring 16.

[0067] Optionally, such as Figure 10 and Figure 15 As shown, the connecting port 1113 includes an anode connecting port 1114, and the connecting hole 1261 includes an anode connecting hole 1261a corresponding to the anode connecting port 1114. The outer peripheral portion 111 is provided with a first through hole 1117 penetrating both sides and located between the anode connecting port 1114 and the anode reaction zone 113; Figure 1 , Figure 6 , Figure 13 and Figure 14 As shown, the cathode covering portion 122 is provided with a first cathode flow channel 1224 that is respectively connected to the anode connecting hole 1261a and the first through hole 1117, and the anode covering portion 121 is provided with a first anode flow channel 1214 that is respectively connected to the first through hole 1117 and the anode clearance port 1212. The anode connecting hole 1261a is connected to the anode clearance port 1212 in sequence through the first cathode flow channel 1224, the first through hole 1117, and the first anode flow channel 1214.

[0068] Specifically, the anode connection port 1114 may include an anode inlet 1114a and an anode outlet 1114b, which are respectively located at both ends of the bipolar plate body 11 along its length. In addition, the liquid flow connection port 1116 may include a first liquid flow connection port 1116a and a second liquid flow connection port 1116b. The first liquid flow connection port 1116a is located at the same end of the bipolar plate body 11 and is symmetrical about the center of the anode outlet 1114b about the center of the bipolar plate body 11. The second liquid flow connection port 1116b is located at the same end of the bipolar plate body 11 and is symmetrical about the center of the anode inlet 1114a about the center of the bipolar plate body 11.

[0069] In this optional embodiment, the anode connecting hole 1261a can be connected to the anode clearance port 1212 in sequence through the first cathode flow channel 1224, the first through hole 1117, and the first anode flow channel 1214, thereby realizing normal conduction between the anode connecting hole 1261a and the anode clearance port 1212, and thus enabling the anode fluid to flow between the anode connecting hole 1261a and the anode reaction zone 113; at the same time, the first cathode flow channel 1224 and the first anode flow channel 1214 can play a better guiding role for the fluid, making it easier for the anode fluid to flow; in addition, by setting the first cathode flow channel 1224 in the cathode covering part 122 and the first anode flow channel 1214 in the anode covering part 121, the first cathode flow channel 1224 and the first anode flow channel 1214 can be independent of the bipolar plate body 11, making it easier to process and manufacture.

[0070] Optionally, such as Figure 11 and Figure 12 As shown, the anode covering portion 121 is provided with a groove 1215 located between the first through hole 1117 and the anode clearance opening 1212; the bipolar plate 10 also includes an insert 17 disposed in the groove 1215, the insert 17 is provided with a flow channel groove 171 on the side facing the bipolar plate body 11, and the bipolar plate body 11 covers the opening of the flow channel groove 171 to form the first anode flow channel 1214.

[0071] Specifically, the insert 17 can be made of the same material as the cover 12, which can reduce production costs and improve production efficiency. Alternatively, the insert 17 can be installed in the groove 1215 by, for example, adhesive bonding.

[0072] In this optional embodiment, directly forming the first anode channel 1214 and the first cathode channel 1224 simultaneously on the cover 12 may lead to high processing difficulty due to the complexity of the channel structure. However, this solution, by placing the first anode channel 1214 in the insert 17, allows the first anode channel 1214 and the first cathode channel 1224 to belong to different components. The cover 12 and the insert 17 can be assembled after their respective channel processing is completed. This helps to reduce the complexity of the channel structure in the same component and makes processing simpler. By setting the channel groove 171... The first anode flow channel 1214 is formed on the side of the insert 17 facing the bipolar plate body 11, which ensures the flow of anode fluid between the first through hole 1117 and the anode clearance port 1212. In addition, by providing the flow channel groove 171 on the side of the insert 17 facing the bipolar plate body 11 instead of the side of the insert 17 facing away from the bipolar plate body 11, the flatness of the side of the insert 17 facing away from the bipolar plate body 11 can be improved, so that the forces on both sides of the membrane electrode 20 between the two bipolar plates 10 are more balanced, and the membrane electrode 20 is prevented from being deformed or even damaged.

[0073] Optionally, such as Figure 11 and Figure 12 As shown, the side wall of the groove 1215 is provided with a recess 1215a, and the insert 17 is provided with a protrusion 172 that cooperates with the recess 1215a.

[0074] Specifically, the opposite side walls of the groove 1215 are respectively provided with a recess 1215a, and the insert 17 is provided with two protrusions 172 that correspond to and cooperate with the two recesses 1215a.

[0075] In this optional embodiment, the interlocking of the protrusion 172 and the recess 1215a makes the insert 17 more securely installed in the groove 1215, thereby improving the structural stability of the entire bipolar plate 10.

[0076] Optionally, such as Figure 10 and Figure 15As shown, the connecting port 1113 includes a cathode connecting port 1115, and the connecting hole 1261 includes a cathode connecting hole 1261b corresponding to the cathode connecting port 1115. The outer peripheral portion 111 is provided with a second through hole 1118 that penetrates both sides of it and is located between the cathode connecting port 1115 and the cathode reaction zone 112. The anode covering portion 121 is provided with a second anode flow channel 1216 that is respectively connected to the cathode connecting hole 1261b and the second through hole 1118. The cathode covering portion 122 is provided with a second cathode flow channel 1225 that is respectively connected to the second through hole 1118 and the cathode clearance port 1222. The cathode connecting hole 1261b is connected to the cathode clearance port 1222 in sequence through the second anode flow channel 1216, the second through hole 1118, and the second cathode flow channel 1225.

[0077] Specifically, the bipolar plate 10 can be used in a PEM electrolytic cell or an AEM electrolytic cell. When the bipolar plate 10 is used in a PEM electrolytic cell, such as Figure 10 As shown, the cathode connection port 1115 may include multiple gas outlets 1115a, which are respectively located at both ends of the bipolar plate body 11 along the width direction. Additionally, the liquid connection port 1116 may include multiple third liquid connection ports 1116c, which are respectively located at both ends of the bipolar plate body 11 along the width direction. The multiple third liquid connection ports 1116c and the multiple gas outlets 1115a are symmetrically arranged about the center point of the bipolar plate body 11, corresponding one-to-one. When the bipolar plate 10 is used in an AEM electrolytic cell, as... Figure 15 As shown, the cathode connection port 1115 may include a cathode inlet 1115b and a cathode outlet 1115c, which are respectively located at both ends of the bipolar plate body 11 along the width direction. In addition, the liquid connection port 1116 may include a fourth liquid connection port 1116d and a fifth liquid connection port 1116e. The fourth liquid connection port 1116d is located at the same end of the bipolar plate body 11 as the cathode inlet 1115b and is symmetrical about the center point of the cathode outlet 1115c about the center point of the bipolar plate body 11. The fifth liquid connection port 1116e is located at the same end of the bipolar plate body 11 as the cathode outlet 1115c and is symmetrical about the center point of the cathode inlet 1115b about the center point of the bipolar plate body 11.

[0078] In this optional embodiment, the cathode connecting hole 1261b can be connected to the cathode clearance port 1222 in sequence through the second anode flow channel 1216, the second through hole 1118, and the second cathode flow channel 1225, thereby realizing normal conduction between the cathode connecting hole 1261b and the cathode clearance port 1222, and thus enabling the cathode fluid to flow between the cathode connecting hole 1261b and the cathode reaction zone 112; at the same time, the second anode flow channel 1216 and the second cathode flow channel 1225 can play a better guiding role for the fluid, making it easier for the cathode fluid to flow; in addition, by setting the second cathode flow channel 1225 in the cathode covering part 122 and the second anode flow channel 1216 in the anode covering part 121, the second cathode flow channel 1225 and the second anode flow channel 1216 can be independent of the bipolar plate body 11, making it easier to process and manufacture.

[0079] like Figure 16 As shown in the figure, a bipolar plate assembly provided by this utility model includes a plurality of bipolar plates 10 as described above. The plurality of bipolar plates 10 are stacked sequentially. In any two adjacent bipolar plates 10, one bipolar plate 10 is rotated 180° relative to the other bipolar plate 10 around its center point.

[0080] In this embodiment, by rotating one bipolar plate 10 180° relative to the other bipolar plate 10 around its center point, the forces on both sides of the membrane electrode 20 between the two adjacent bipolar plates 10 can be more balanced, preventing the membrane electrode 20 from deforming or even being damaged.

[0081] Optionally, such as Figure 16 As shown, in two adjacent bipolar plates 10, one bipolar plate 10 is provided with a first inspection section 18, and the other bipolar plate 10 is provided with a second inspection section 19 opposite to the first inspection section 18.

[0082] Specifically, the first inspection section 18 and the second inspection section 19 can be strip-shaped grooves of the same shape provided on the corresponding bipolar plates 10. More specifically, the strip-shaped grooves can be provided on the cathode covering section 122 of the covering member 12. In addition, the second inspection section 19 being opposite to the first inspection section 18 means that the second inspection section 19 and the first inspection section 18 are arranged opposite to each other in the arrangement direction of the plurality of bipolar plates 10.

[0083] In this optional embodiment, the first inspection unit 18 and the second inspection unit 19 can be powered on to detect the two bipolar plates 10 respectively. Since the second inspection unit 19 is arranged opposite to the first inspection unit 18, the positions of the second inspection unit 19 and the first inspection unit 18 are close, which facilitates the continuous inspection of the two inspection units and improves the inspection efficiency.

[0084] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A bipolar plate, characterized in that, It includes a bipolar plate body (11) and a covering (12); the bipolar plate body (11) has a reaction zone and an outer peripheral portion (111) disposed outside the reaction zone; the covering (12) is disposed on the bipolar plate body (11) and includes an anode covering portion (121) and a cathode covering portion (122), the anode covering portion (121) covering the anode side of the outer peripheral portion (111) and the cathode covering portion (122) covering the cathode side of the outer peripheral portion (111).

2. The bipolar plate according to claim 1, characterized in that, The outer peripheral portion (111) is provided with a positioning hole (1111); the covering member (12) also includes an embedded portion (123) disposed in the positioning hole (1111), the two ends of the embedded portion (123) are respectively connected to the anode covering portion (121) and the cathode covering portion (122), and the covering member (12) is provided with a positioning inner hole (1231) that passes through the anode covering portion (121), the embedded portion (123) and the cathode covering portion (122) in sequence.

3. The bipolar plate according to claim 1, characterized in that, The covering (12) further includes a side enclosure (124) covering the peripheral side of the outer peripheral portion (111), and the two ends of the side enclosure (124) are respectively connected to the anode covering portion (121) and the cathode covering portion (122).

4. The bipolar plate according to claim 1, characterized in that, The outer peripheral portion (111) is provided with a through hole (1112a); the covering member (12) also includes a filling portion (125) provided in the through hole (1112a), and the two ends of the filling portion (125) are respectively connected to the anode covering portion (121) and the cathode covering portion (122).

5. The bipolar plate according to claim 1, characterized in that, The outer peripheral portion (111) is provided with a connecting port (1113) that passes through both sides thereon; the covering member (12) also includes an embedded portion (126) provided in the connecting port (1113), the two ends of the embedded portion (126) are respectively connected to the anode covering portion (121) and the cathode covering portion (122), and the covering member (12) is provided with a connecting hole (1261) that passes through the anode covering portion (121), the embedded portion (126) and the cathode covering portion (122) in sequence.

6. The bipolar plate according to claim 5, characterized in that, The anode covering part (121) is provided with a first anode mounting groove (1211) surrounding the connecting hole (1261), and the bipolar plate (10) further includes a first anode sealing ring (13) provided in the first anode mounting groove (1211); the cathode covering part (122) is provided with a first cathode mounting groove (1221) surrounding the connecting hole (1261), and the bipolar plate (10) further includes a first cathode sealing ring (14) provided in the first cathode mounting groove (1221).

7. The bipolar plate according to claim 5, characterized in that, The reaction zone includes an anode reaction zone (113) located on the anode side of the bipolar plate body (11) and a cathode reaction zone (112) located on the cathode side of the bipolar plate body (11); an anode clearance opening (1212) opposite to the anode reaction zone (113) is formed in the middle of the anode covering part (121), and a second anode mounting groove (1213) surrounding the anode clearance opening (1212) is provided on the anode covering part (1211), and a second anode sealing ring (15) is provided in the second anode mounting groove (1213); a cathode clearance opening (1222) opposite to the cathode reaction zone (112) is formed in the middle of the cathode covering part (122), and a second cathode mounting groove (1223) surrounding the cathode clearance opening (1222) is provided on the cathode covering part (1222), and a second cathode sealing ring (16) is provided in the second cathode mounting groove (1223).

8. The bipolar plate according to claim 7, characterized in that, The connecting port (1113) includes an anode connecting port (1114), and the connecting hole (1261) includes an anode connecting hole (1261a) corresponding to the anode connecting port (1114). The outer peripheral portion (111) is provided with a first through hole (1117) penetrating both sides and located between the anode connecting port (1114) and the anode reaction zone (113). The cathode covering portion (122) is provided with a hole that is connected to the anode connecting hole (1261a). The first cathode flow channel (1224) of the first through hole (1117) is provided on the anode covering part (121), and the first anode flow channel (1214) is respectively connected to the first through hole (1117) and the anode clearance port (1212). The anode connecting hole (1261a) is connected to the anode clearance port (1212) in sequence through the first cathode flow channel (1224), the first through hole (1117), the first anode flow channel (1214).

9. The bipolar plate according to claim 8, characterized in that, The anode covering portion (121) is provided with a groove (1215) located between the first through hole (1117) and the anode clearance opening (1212); the bipolar plate (10) also includes an insert (17) disposed in the groove (1215), the insert (17) is provided with a flow channel groove (171) on the side facing the bipolar plate body (11), and the bipolar plate body (11) covers the opening of the flow channel groove (171) to form the first anode flow channel (1214).

10. The bipolar plate according to claim 9, characterized in that, The sidewall of the groove (1215) is provided with a recess (1215a), and the insert (17) is provided with a protrusion (172) that mates with the recess (1215a).

11. The bipolar plate according to claim 7, characterized in that, The connecting port (1113) includes a cathode connecting port (1115), and the connecting hole (1261) includes a cathode connecting hole (1261b) corresponding to the cathode connecting port (1115). The outer peripheral portion (111) is provided with a second through hole (1118) penetrating both sides and located between the cathode connecting port (1115) and the cathode reaction zone (112). The anode covering portion (121) is provided with a connection to the cathode connecting hole (1261b). The cathode covering portion (122) is provided with a second anode flow channel (1216) and a second cathode flow channel (1225) respectively connected to the second through hole (1118) and the cathode clearance port (1222). The cathode connecting hole (1261b) is connected to the cathode clearance port (1222) in sequence through the second anode flow channel (1216), the second through hole (1118), and the second cathode flow channel (1225).

12. A bipolar plate assembly, characterized in that, It includes a plurality of bipolar plates (10) as described in any one of claims 1-11, wherein the plurality of bipolar plates (10) are stacked sequentially, and in any two adjacent bipolar plates (10), one of the bipolar plates (10) is rotated 180° relative to the other bipolar plate (10) around its center point.

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