CN210576225U - Bipolar plate and fuel cell stack - Google Patents
Bipolar plate and fuel cell stack Download PDFInfo
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- CN210576225U CN210576225U CN201921806372.8U CN201921806372U CN210576225U CN 210576225 U CN210576225 U CN 210576225U CN 201921806372 U CN201921806372 U CN 201921806372U CN 210576225 U CN210576225 U CN 210576225U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The present application relates to a bipolar plate and a fuel cell stack. The bipolar plate includes an anode single plate and a cathode single plate. The anode single plate comprises a first surface and a second surface, wherein the first surface is provided with an anode flow field. The cathode single plate comprises a third surface and a fourth surface which are provided with a cathode flow field. The inlet end and the outlet end of the anode flow field respectively extend to the outer edge of the anode single plate. The inlet end and the outlet end of the cathode flow field respectively extend to the outer edge of the cathode single plate, and the second surface and the fourth surface are fixedly attached together to form the bipolar plate. The outer edges of the anode single plate and the cathode single plate are provided with sealing grooves. The seal groove can be used for sealing the flow field channel. Only a flow field and a seal groove are arranged in the plane of the bipolar plate. The design of the inlet and outlet outer frames of anode fuel, cathode fuel and cooling liquid in the traditional bipolar plate is reduced. The effective area rate of the bipolar plate power generation part can be improved on the basis of ensuring the high-efficiency power generation of the fuel cell stack.
Description
Technical Field
The present application relates to the field of fuel cells, and more particularly, to a bipolar plate and a fuel cell stack.
Background
Currently, environmental-friendly zero-emission new energy automobiles are developing at a high speed worldwide, and a plurality of developed countries internationally set a retirement schedule of traditional gasoline vehicles. Among new energy vehicles, a fuel cell electric vehicle driven by a fuel cell as a power source uses fuel hydrogen to replace conventional gasoline as an energy source, and is considered to be a new energy vehicle with performance comparable to that of the conventional gasoline vehicle in all aspects. Many notable automobile manufacturers have introduced commercial fuel cell automobiles internationally.
The bipolar plate is one of the key components of the fuel cell, and plays important roles of conveying and separating fuel, air and cooling liquid, mechanical support, electronic conduction and the like in the fuel cell. In addition to the above functions, the design of the bipolar plate determines the effective area ratio of the fuel cell plate, and further determines the volume power density of the fuel cell stack. The bipolar plate design comprises a gas and cooling liquid inlet and outlet design, a sealing design, a flow field design, a cell stack assembly positioning design and the like. In the traditional bipolar plate design, the outer frames of the inlet and the outlet of fuel, air and cooling liquid are generally designed in the plane of the bipolar plate, the inlet and the outlet frames need to be designed around the sealing, and the flow field of the effective power generation part is positioned in the inner part surrounded by the designs, so that the area ratio of the inlet and the outlet of the traditional bipolar plate and the sealing area of the inlet and the outlet of the traditional bipolar plate is large, and the effective area rate of the power generation part is low.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a bipolar plate and a fuel cell stack for solving the problems of large area ratio of the inlet and the outlet and the sealing of the conventional bipolar plate and low effective area ratio of the power generation part.
A bipolar plate comprising:
the anode single plate comprises a first surface and a second surface, wherein an anode flow field is arranged on the first surface, and an inlet end and an outlet end of the anode flow field respectively extend to the outer edge of the anode single plate; and
the cathode single plate comprises a third surface and a fourth surface, the third surface is provided with a cathode flow field, an inlet end and an outlet end of the cathode flow field respectively extend to the outer edge of the cathode single plate, and the second surface of the anode single plate is fixedly attached to the fourth surface of the cathode single plate;
and sealing grooves are formed in the outer edges of the anode single plate and the cathode single plate.
In one embodiment, the method further comprises the following steps:
and the anode sealing element is clamped and connected with the sealing groove of the anode single plate so as to cover the periphery of the anode flow field.
In one embodiment, the method further comprises the following steps:
and the cathode sealing element is clamped and connected with the sealing groove of the cathode single plate so as to cover the periphery of the cathode flow field.
In one embodiment, the anode single plate further includes:
and the inlet end and the outlet end of the first cooling flow field respectively extend to the outer edge of the anode single plate.
In one embodiment, the cathode single plate further includes:
and the inlet end and the outlet end of the second cooling flow field extend to the outer edge of the cathode single plate respectively, and when the second surface and the fourth surface are fixedly attached, the first cooling flow field and the second cooling flow field are completely overlapped to form a cooling liquid channel.
A fuel cell stack comprising:
two end plates;
a stack assembly disposed between the two end plates, the stack assembly comprising a plurality of bipolar plates as described in any of the above embodiments, the plurality of bipolar plates being bonded together to form an anode fuel transport region, a cathode fuel transport region, and a coolant transport region; and
and the plurality of transportation interfaces are respectively arranged in the anode fuel transportation area, the cathode fuel transportation area and the cooling liquid transportation area through flanges.
In one embodiment, the method further comprises the following steps:
the frame sealing piece is respectively arranged in the anode fuel transportation area, the cathode fuel transportation area and the cooling liquid transportation area, and the flange is used for respectively arranging the transportation interfaces in the anode fuel transportation area, the cathode fuel transportation area and the cooling liquid transportation area.
In one embodiment, the frame seal extends from an edge of the cell stack assembly.
In one embodiment, the cell stack assembly further comprises:
and each membrane electrode is arranged between two adjacent bipolar plates.
In one embodiment, the membrane electrode and the bipolar plate adjacent to the membrane electrode are fixedly connected by a seal line, which is connected to and extends from the edge of the bipolar plate.
In one embodiment, the end plates are provided with screw holes, and a screw beam penetrates through the screw hole between the two end plates.
The bipolar plate comprises an anode single plate and a cathode single plate. The anode single plate comprises a first surface and a second surface, wherein the first surface and the second surface are provided with an anode flow field. The cathode single plate comprises a third surface and a fourth surface which are provided with a cathode flow field. The inlet end and the outlet end of the anode flow field respectively extend to the outer edge of the anode single plate. The inlet end and the outlet end of the cathode flow field respectively extend to the outer edge of the cathode single plate, and the second surface and the fourth surface are fixedly attached together to form the bipolar plate. And sealing grooves are formed in the outer edges of the anode single plate and the cathode single plate. The seal groove can be used for sealing a flow field channel. And only a flow field and a sealing groove are arranged in the plane of the bipolar plate. The design of the inlet and outlet outer frames of anode fuel, cathode fuel and cooling liquid in the traditional bipolar plate is reduced. The effective area rate of the bipolar plate power generation part can be improved on the basis of ensuring the high-efficiency power generation of the fuel cell stack.
Drawings
FIG. 1 is a front view of a cathode single plate according to an embodiment of the present application;
FIG. 2 is a front view of an anode single plate according to an embodiment of the present application;
FIG. 3 is a reverse side view of a cathode single plate provided in accordance with an embodiment of the present application;
FIG. 4 is a reverse side view of an anode single plate provided in accordance with an embodiment of the present application;
FIG. 5 is a front view of a bipolar plate provided in accordance with an embodiment of the present application;
FIG. 6 is an opposite view of a bipolar plate provided in accordance with an embodiment of the present application;
FIG. 7 is a top view of a bipolar plate provided in accordance with an embodiment of the present application;
FIG. 8 is a block diagram of a cathode seal provided in accordance with one embodiment of the present application;
FIG. 9 is a block diagram of an anode seal provided in accordance with one embodiment of the present application;
FIG. 10 is a side view of a fuel cell stack according to one embodiment of the present application;
FIG. 11 is an enlarged view of the upper end of a fuel cell stack according to an embodiment of the present application;
FIG. 12 is an enlarged side view of a fuel cell stack according to an embodiment of the present application;
FIG. 13 is a side view of a fuel cell stack according to one embodiment of the present application;
FIG. 14 is a front view of a fuel cell stack according to one embodiment of the present application;
FIG. 15 is a diagram of a seal assembly provided in accordance with one embodiment of the present application;
figure 16 is a side view of a fuel cell stack with a seal assembly according to one embodiment of the present application.
Description of the main element reference numerals
Anode single plate 100
First cooling flow field 121
Cathode single plate 200
Second cooling flow field 221
Sealing groove 230
Cathode fuel transport interface side seal groove 232
Anode fuel transport interface side seal groove 233
Coolant transport interface side seal groove 234
Anode fuel transport region 601
Cathode fuel transport region 602
Anode transport interface flange 611
Cathode transport interface flange 612
Coolant transport interface flange 613
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
One embodiment of the present application provides a bipolar plate 10. The bipolar plate 10 is composed of an anode single plate 10 and a cathode single plate 200 which are attached back to back.
Referring to fig. 1, the cathode single plate 200 includes a third face 210 and a fourth face 220 (i.e., front and back faces of the cathode single plate 200). The front side of the cathode single plate 200 is the front side of the bipolar plate 10. The front surface of the cathode single plate 200 is provided with a cathode flow field 211. The cathode flow field 211 may be a parallel flow field, a serpentine flow field, a corrugated flow field, or other flow field. The inlet and outlet ends of the cathode flow field 211 extend to the outer edge of the cathode single plate 200, respectively. The outer edge of the cathode single plate 200 is provided with a sealing groove 230. The sealing grooves 230 on the cathode single plate 200 may include a cathode sealing groove 231, a cathode fuel transport interface side sealing groove 232, an anode fuel transport interface side sealing groove 233, and a coolant transport interface side sealing groove 234. Wherein a cathode seal groove 231 surrounds the cathode flow field 211. The cathode fuel transport interface side seal groove 232, the anode fuel transport interface side seal groove 233, and the coolant transport interface side seal groove 234 can be considered as convex grooves on the cathode seal groove 231. A cathode fuel transport interface side seal groove 232, an anode fuel transport interface side seal groove 233, and a coolant transport interface side seal groove 234 are respectively disposed on both sides of each transport interface.
Referring to fig. 2, the anode single plate 100 includes a first face 110 and a second face 120 (i.e., a front face and a back face of the anode single plate 100). The front side of the anode single plate 100 is the reverse side of the bipolar plate 10. The front surface of the anode single plate 100 is provided with an anode flow field 111. The anode flow field 111 may be a parallel flow field, a serpentine flow field, a corrugated flow field, or other flow field. The inlet and outlet ends of the anode flow field 111 extend to the outer edges of the anode single plate 100, respectively. The second surface 120 of the anode single plate 100 is fixedly attached to the fourth surface 220 of the cathode single plate 200. The outer edge of the anode single plate 100 is provided with a sealing groove 230. Seal grooves 230 on anode single plate 100 may include an anode seal groove 235, a cathode fuel transport interface side seal groove 232, an anode fuel transport interface side seal groove 233, and a coolant transport interface side seal groove 234. Wherein anode seal groove 235 surrounds anode flow field 111. Cathode fuel transport interface side seal groove 232, anode fuel transport interface side seal groove 233, and coolant transport interface side seal groove 234 can be considered to be convex grooves on anode seal groove 235. A cathode fuel transport interface side seal groove 232, an anode fuel transport interface side seal groove 233, and a coolant transport interface side seal groove 234 are respectively disposed on both sides of each transport interface.
The bipolar plate 10 includes an anode single plate 100 and a cathode single plate 200. The anode single plate 100 includes a first face 110 provided with an anode flow field 111 and a second face 120. The cathode single plate 200 includes a third face 210 provided with a cathode flow field 211 and a fourth face 220. The inlet and outlet ends of the anode flow field 111 extend to the outer edges of the anode single plate 100, respectively. The inlet end and the outlet end of the cathode flow field 211 respectively extend to the outer edge of the cathode single plate 200, and the second face 120 of the anode single plate 100 and the fourth face 220 of the cathode single plate 200 are fixedly attached together to form the bipolar plate 10. The outer edges of the anode single plate 100 and the cathode single plate 200 are each provided with a sealing groove 230. Sealing of the flow field channels may be achieved using seal grooves 230. Only flow fields and seal grooves 230 are provided in the plane of the bipolar plate 10. The design of the inlet and outlet outer frames of the anode fuel, the cathode fuel and the cooling liquid in the traditional bipolar plate 10 is eliminated. The effective area rate of the bipolar plate power generation part can be improved on the basis of ensuring the high-efficiency power generation of the fuel cell stack.
In one embodiment, the anode single plate 100 further includes a first cooling flow field 121. The first cooling flow field 121 is disposed on the second face 120 of the anode single plate 100 (the opposite face of the anode single plate 100). The inlet and outlet ends of the first cooling flow field 121 extend to the outer edge of the anode single plate 100, respectively.
The cathode single plate 200 also includes a second cooling flow field 221. The second cooling flow field 221 is disposed on the fourth face 220 of the cathode single plate 200 (opposite to the cathode single plate 200). The inlet and outlet ends of the second cooling flow fields 221 extend to the outer edge of the cathode single plate 200, respectively. As shown in fig. 3 and 4, the first cooling flow field 121 and the second cooling flow field 221 are cooling flow fields having the same shape and mirror images of each other. When the second face 120 and the fourth face 220 are fixedly attached, the first cooling flow field 121 and the second cooling flow field 221 completely coincide to form a cooling fluid channel.
As shown in fig. 5 and 6, when the cathode single plate 200 and the anode single plate 100 are bonded together to form the bipolar plate 10, the anode fuel inlet/outlet, the cathode fuel inlet/outlet, and the coolant inlet/outlet on the cathode single plate 200 are respectively overlapped with the anode fuel inlet/outlet, the cathode fuel inlet/outlet, and the coolant inlet/outlet on the anode single plate 100.
Fig. 7 is a top view of a bipolar plate according to an embodiment of the present application, showing that the inlet/outlet of the anode fuel corresponds to the inlet and outlet of the anode flow field, respectively. The cooling liquid inlet/outlet positions just correspond to the inlet end and the outlet end of the cooling liquid channel respectively. Anode fuel may enter the anode flow field 111 through an anode fuel inlet/outlet located above the bipolar plate 10 and exit through an anode fuel inlet/outlet located at the bottom of the bipolar plate 10. The cathode fuel may enter the cathode flow field 211 through a cathode fuel inlet/outlet located on the left side of the bipolar plate 10 and exit through a cathode fuel inlet/outlet located on the right side of the bipolar plate 10. The coolant enters the coolant channel through a coolant inlet/outlet located above the bipolar plate 10 and exits through a coolant inlet/outlet located at the bottom of the bipolar plate 10.
In one embodiment, the bipolar plate 10 further includes an anode seal 300 and a cathode seal 400.
The anode sealing member 300 is engaged with the sealing groove 230 of the anode single plate 100 to cover the periphery of the anode flow field 111. The cathode sealing member 400 is engaged with the sealing groove 230 of the cathode single plate 200 to cover the periphery of the cathode flow field 211. As shown in fig. 8, the cathode seal 400 is a symmetrical seal, and the cathode seal 400 can be engaged with the sealing groove 230 of the cathode single plate 200. As shown in fig. 9, the anode seal 300 is a seal with central symmetry, and the anode seal 300 can be just engaged in the seal groove 230 of the anode single plate 100. Sealing of the flow field channels may be achieved using the anode seal 300 and the cathode seal 400 in conjunction with the seal groove 230.
Referring to fig. 10, one embodiment of the present application provides a fuel cell stack 20. The fuel cell stack 20 includes two end plates 500, a cell stack assembly 600, and a plurality of transport interfaces 604.
The cell stack assembly 600 is disposed between two end plates 500. The cell stack assembly 600 includes a plurality of bipolar plates 10 as in any of the embodiments described above. A plurality of bipolar plates 10 are bonded together to form an anode fuel transport region 601, a cathode fuel transport region 602, and a coolant transport region 603. The plurality of transport interfaces 604 are respectively disposed on the anode fuel transport region 601, the cathode fuel transport region 602, and the coolant transport region 603 through flanges.
Two end plates 500 assemble several bipolar plates 10 into a stack. An anode fuel inlet/outlet, a cathode fuel inlet/outlet, and a coolant inlet/outlet on each bipolar plate 10 of the plurality of bipolar plates 10 are assembled to form an anode fuel transport region 601, a cathode fuel transport region 602, and a coolant transport region 603, respectively. Specifically, referring to fig. 11, an anode fuel transport region 601 and a coolant transport region 603 can be disposed on both the top and bottom sides of the fuel cell stack 20. Referring to fig. 12, a cathode fuel transport region 602 may be disposed on the side of fuel cell stack 20.
Referring to fig. 13 and 14, the anode fuel transport region 601, the cathode fuel transport region 602, and the coolant transport region 603 may be sealed with flanges. The flanges may include an anode transport interface flange 611, a cathode transport interface flange 612, and a coolant transport interface flange 613. Anode transport interface flange 611, cathode transport interface flange 612, and coolant transport interface flange 613 are disposed in anode fuel transport region 601, cathode fuel transport region 602, and coolant transport region 603, respectively. Air, hydrogen and cooling fluid of the fuel cell stack 20 flow into and out of the stack through the side flanges of the fuel cell stack 20 and the transport interfaces 604 disposed on the respective flanges. After entering the inlet flange, the fluid further enters between the bipolar plates 10 of the fuel cell stack 20 (coolant) or between the membrane electrode and the bipolar plates 10 (hydrogen, air) through the openings of the bipolar plates 10 on the sides of the fuel cell stack 20 (entrance end of each transport zone). And then enters the outlet flange through the openings of the bipolar plates on the side of the stack (the outlet ends of the transportation areas).
In one embodiment, the cell stack assembly 600 further includes a plurality of membrane electrodes 610 and two current collecting plates. Each membrane electrode 610 is disposed between two adjacent bipolar plates 10. That is, one bipolar plate 10 and one membrane electrode 610 are bonded together to form one unit cell. The two current collecting plates are arranged at intervals. A plurality of unit cells are disposed between the two current collecting plates. The two end plates 500 are disposed at the outer sides of the two collecting plates, respectively. The collector plate and the end plate 500 on the outer side thereof may be sealed by a face seal. In an alternative embodiment, the membrane electrode 610 and the bipolar plate 10 adjacent to the membrane electrode 610 are fixedly connected by seal lines, which are attached to the edges of the bipolar plate 10 and extend from the edges of the bipolar plate 10. For example, the seal line may extend 0.01mm to 0.05mm from the edge of the bipolar plate 10. And can be connected to port seal lines mounted on the sides of the fuel cell stack 20 to form a "T" connection. The material of the sealing line can be rubber, silicon gel or other soft and dense materials. The membrane electrode 610 and the bipolar plate 10 adjacent to the membrane electrode 610 may also be bonded together by means of bonding, which also extends to the edge of the bipolar plate 10, and forms a continuous solid structure on the side of the fuel cell stack 20 after assembly, and forms a side seal at the seal line on the side of the fuel cell stack 20. In order to fulfill the function of the sealing line, the forming process is not limited to liquid injection molding, independent installation, integral pile injection molding, dispensing, screen printing and the like. The seal lines between the bipolar plate 10 and the membrane electrode 610 and the seal lines at the side ports of the fuel cell stack 20 are not limited to being formed separately and then assembled, or to being formed at one time.
Referring to fig. 15, in one embodiment, the fuel cell stack 20 further includes a frame seal 605 and a cell seal 614. The frame seal 605 is disposed in the anode fuel transport region 601, the cathode fuel transport region 602, and the coolant transport region 603, respectively, and the flange is disposed with the plurality of transport interfaces 604 in the anode fuel transport region 601, the cathode fuel transport region 602, and the coolant transport region 603, respectively, via the frame seal 605. An insulating plate 606 with side seal grooves may be provided between the flange and the transport zone. In an alternative embodiment, the frame seal 605 extends from the edge of the cell stack assembly 600. To prevent spillage of fuel or air. A membrane electrode 610 and a bipolar plate 10 may be sealed by cell seals 614 to form a single cell.
Referring to fig. 16, in one embodiment, the sealing performance of the package of the fuel cell stack 20 is further improved. The end plates 500 are provided with screw holes 607, and a screw beam is inserted into the screw hole 607 between the two end plates 500. The screw beam completes axial fastening of the pile pull rod and radial Faraday sealing and pressing of the pull rod.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A bipolar plate, comprising:
the anode single plate (100) comprises a first surface (110) and a second surface (120), wherein the first surface (110) is provided with an anode flow field (111), and the inlet end and the outlet end of the anode flow field (111) respectively extend to the outer edge of the anode single plate (100); and
the cathode single plate (200) comprises a third surface (210) and a fourth surface (220), the third surface (210) is provided with a cathode flow field (211), the inlet end and the outlet end of the cathode flow field (211) respectively extend to the outer edge of the cathode single plate (200), and the second surface (120) of the anode single plate (100) is fixedly attached to the fourth surface (220) of the cathode single plate (200);
the outer edges of the anode single plate (100) and the cathode single plate (200) are provided with sealing grooves (230).
2. The bipolar plate of claim 1, further comprising:
and the anode sealing element (300) is clamped and connected with the sealing groove (230) of the anode single plate (100) so as to cover the periphery of the anode flow field (111).
3. The bipolar plate of claim 2, further comprising:
and the cathode sealing element (400) is clamped and connected with the sealing groove (230) of the cathode single plate (200) so as to cover the periphery of the cathode flow field (211).
4. A bipolar plate according to claim 3, wherein said anode single plate (100) further comprises:
the first cooling flow field (121) is arranged on the second surface (120) of the anode single plate (100), and an inlet end and an outlet end of the first cooling flow field (121) respectively extend to the outer edge of the anode single plate (100).
5. A bipolar plate according to claim 4, wherein said cathode single plate (200) further comprises:
and the second cooling flow field (221) is arranged on the fourth surface (220) of the cathode single plate (200), the inlet end and the outlet end of the second cooling flow field (221) respectively extend to the outer edge of the cathode single plate (200), and when the second surface (120) and the fourth surface (220) are fixedly attached, the first cooling flow field (121) and the second cooling flow field (221) are completely overlapped to form a cooling liquid channel.
6. A fuel cell stack, comprising:
two end plates (500);
a cell stack assembly (600) disposed between two of the end plates (500), the cell stack assembly (600) comprising a plurality of bipolar plates (10) according to any one of claims 1-4, the plurality of bipolar plates (10) being attached together to form an anode fuel transport region (601), a cathode fuel transport region (602), and a coolant transport region (603); and
a plurality of transport interfaces (604) respectively arranged on the anode fuel transport area (601), the cathode fuel transport area (602) and the cooling liquid transport area (603) through flanges.
7. The fuel cell stack of claim 6, further comprising:
and the frame sealing piece (605) is respectively arranged in the anode fuel transportation area (601), the cathode fuel transportation area (602) and the cooling liquid transportation area (603), and the flange is used for respectively arranging the transportation interfaces (604) in the anode fuel transportation area (601), the cathode fuel transportation area (602) and the cooling liquid transportation area (603) through the frame sealing piece (605).
8. The fuel cell stack of claim 7 wherein the frame seal (605) extends from an edge of the cell stack assembly (600).
9. The fuel cell stack of claim 8, wherein the cell stack assembly (600) further comprises:
a plurality of membrane electrodes (610), each membrane electrode (610) being disposed between two adjacent bipolar plates (10).
10. The fuel cell stack according to claim 9, wherein the membrane electrode (610) and the bipolar plate (10) adjacent to the membrane electrode (610) are fixedly connected by a seal line, which is connected to an edge of the bipolar plate (10) and protrudes from the edge of the bipolar plate (10).
11. The fuel cell stack according to claim 10, wherein said end plates (500) are provided with screw holes (607), and screw beams are inserted into said screw holes (607) between two of said end plates (500).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921806372.8U CN210576225U (en) | 2019-10-25 | 2019-10-25 | Bipolar plate and fuel cell stack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921806372.8U CN210576225U (en) | 2019-10-25 | 2019-10-25 | Bipolar plate and fuel cell stack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600046A (en) * | 2020-06-04 | 2020-08-28 | 清华大学山西清洁能源研究院 | Short-distance direct-discharging bipolar plate for fuel cell |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600046A (en) * | 2020-06-04 | 2020-08-28 | 清华大学山西清洁能源研究院 | Short-distance direct-discharging bipolar plate for fuel cell |
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