CN115189007A - End structure of fuel cell stack and fuel cell stack - Google Patents
End structure of fuel cell stack and fuel cell stack Download PDFInfo
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- CN115189007A CN115189007A CN202210945997.2A CN202210945997A CN115189007A CN 115189007 A CN115189007 A CN 115189007A CN 202210945997 A CN202210945997 A CN 202210945997A CN 115189007 A CN115189007 A CN 115189007A
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- cell stack
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
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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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- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses an end part structure of a fuel cell stack and the fuel cell stack, and belongs to the technical field of fuel cells. The end structure of the fuel cell stack comprises an end plate, a current collecting plate, a flexible pad and a gas diffusion layer, wherein the end plate is provided with an installation groove, and the current collecting plate is arranged in the installation groove; the flexible pad is clamped between the current collecting plate and the end plate, and two sides of the flexible pad are fixedly connected with the end plate and the current collecting plate respectively; the gas diffusion layer is attached to the current collecting plate. The both sides of flexible pad bond with end plate and current collection board respectively, and gas diffusion layer pastes in the current collection board to end plate, current collection board and gas diffusion layer carry out preassembly, improved end structure's integrated level, not only can improve the assembly efficiency of fuel cell pile, still can avoid current collection board and gas diffusion layer to appear shifting scheduling problem, improve the assembly precision.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to an end structure of a fuel cell stack and the fuel cell stack.
Background
Fuel cells are built up of a stack of bipolar plates, membrane electrodes, packages, collector plates and end plates, which are important components of the fuel cell.
The fuel cell needs two end plates and two current collecting plates, and the two current collecting plates are arranged on two sides of the stack body and used as the anode and the cathode of the cell to lead out the current of the whole fuel cell. The end plate needs to have good mechanical properties, generally made of metal, tightly presses the core monocell to form a stable structure, and simultaneously needs to provide gas and water channels for the fuel cell to perform chemical reaction, which also requires that the end plate needs to have good corrosion resistance.
In the prior art, an insulating plate is usually placed between an end plate and a current collecting plate, or an insulating material is coated around the end plate to realize the insulation of the current collecting plate and the end plate, and the current collecting plate and the end plate are independently assembled during assembly. The assembly method has high assembly requirements, the collector plate and the end plate need a positioning structure to realize accurate positioning of positions, and meanwhile, the number of parts is large, the accumulated error is large, and the weight reduction of the whole electric pile is not facilitated.
Meanwhile, a piece of carbon paper needs to be assembled between the collector plate and the reactor core, and the carbon paper is horizontally placed above a bipolar plate reaction area of the reactor core at present, so that the carbon paper is easily moved and dislocated during stacking, and the performance and the air tightness of the electric reactor are affected.
Disclosure of Invention
The invention aims to provide an end part structure of a fuel cell stack and the fuel cell stack, which improve the assembly efficiency and precision of the fuel cell stack.
In order to realize the purpose, the following technical scheme is provided:
in one aspect, there is provided an end structure of a fuel cell stack, including:
the end plate is provided with a mounting groove;
the collector plate is arranged in the mounting groove;
the flexible pad is clamped between the current collecting plate and the end plate, and two sides of the flexible pad are fixedly connected with the end plate and the current collecting plate respectively;
and the gas diffusion layer is adhered to the current collecting plate.
As an alternative of the end structure of the fuel cell stack, the gas diffusion layer is provided with a plastic sealing edge, and the plastic sealing edge is fixed with the current collecting plate in an adhesion mode.
As an alternative to the end structure of the fuel cell stack, the collector plate is provided with a first positioning structure, the end plate is provided with a first positioning fit structure, and the first positioning fit structure can be matched with the first positioning structure to position the collector plate;
the current collecting plate is provided with a second positioning structure for positioning the gas diffusion layer.
As the alternative of the end structure of the fuel cell stack, the mounting groove comprises a first groove body and a second groove body which are communicated in sequence along the depth direction of the mounting groove, the current collecting plate is arranged in the first groove body, and the flexible pad is arranged in the second groove body.
As an alternative to the end structure of the fuel cell stack, the first tank body has the same shape as the current collecting plate, and the first tank body has the same size as the current collecting plate;
the shape of the second groove body is the same as that of the flexible pad, and the size of the second groove body is the same as that of the flexible pad.
As an alternative to the end structure of the fuel cell stack, the flexible mat is in the form of a grid.
As an alternative to the end structure of the fuel cell stack, the end plate includes a metal plate and an insulating plate connected to one side of the metal plate, and the mounting groove is provided in the insulating plate.
As an alternative of an end structure of a fuel cell stack, the end plate is provided with a plurality of through holes, each through hole comprises a hole section I and a hole section II which are communicated with each other and are correspondingly arranged, the hole section I is arranged on the insulating plate, the hole section II is arranged on the metal plate, and the inner wall of the hole section II is provided with an insulating layer I in transition connection with the insulating plate.
As an alternative to the end structure of the fuel cell stack, the insulating plate is provided with an annular sealing groove, and the sealing groove is arranged around part of the outside of the through hole.
As an alternative to the end structure of the fuel cell stack, the side of the metal plate facing away from the insulating plate is provided with a plurality of columns;
the second hole section of one through hole is arranged in one cylinder.
As an alternative of the end structure of the fuel cell stack, the periphery of the metal plate is provided with a second insulating layer transitionally connected with the insulating plate.
In another aspect, a fuel cell stack is provided, which includes a stack core and two end structures of the fuel cell stack as described above, and the end structures of the two fuel cell stacks are respectively disposed on two sides of the stack core in a stacking direction.
Compared with the prior art, the invention has the beneficial effects that:
according to the end structure of the fuel cell stack and the fuel cell stack, two sides of the flexible pad are respectively and fixedly connected with the end plate and the current collecting plate, and the gas diffusion layer is adhered to the current collecting plate so as to pre-assemble the end plate, the current collecting plate and the gas diffusion layer, so that the integration level of the end structure is improved, the assembly efficiency of the fuel cell stack can be improved, the problems of displacement and the like of the current collecting plate and the gas diffusion layer can be avoided, and the assembly precision is improved.
Drawings
FIG. 1 is an exploded view of a fuel cell stack for use in an embodiment of the present invention;
fig. 2 is an exploded view of an end structure of a fuel cell stack in an embodiment of the present invention;
fig. 3 is a cross-sectional view of an end structure of a fuel cell stack in an embodiment of the invention;
FIG. 4 is a schematic diagram of the mating relationship of a collector plate and gas diffusion layers in an embodiment of the present invention;
FIG. 5 is a first schematic structural diagram of a first end plate according to an embodiment of the present invention;
FIG. 6 is a second schematic structural view of a first end plate according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a second end plate according to an embodiment of the present invention;
fig. 8 is a cross-sectional view of the second end plate in the embodiment of the present invention.
Reference numerals:
1. an end plate; 1a, an end plate I; 1b, an end plate II; 11. mounting grooves; 111. a first tank body; 112. a second tank body; 12. a positioning and matching structure; 13. a metal plate; 131. a cylinder; 132. a second insulating layer; 14. an insulating plate; 15. a through hole; 15a, a reaction through hole; 15b, an exhaust through hole; 151. a first hole section; 152. a second hole section; 1521. a first insulating layer; 16. a sealing groove;
2. a collector plate; 21. a first positioning structure; 22. a second positioning structure;
3. a flexible pad;
4. a gas diffusion layer; 41. plastic edge sealing;
5. and (4) a reactor core.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
In the prior art, when a fuel cell stack is assembled, bipolar plates, membrane electrodes, packages, current collecting plates and end plates need to be stacked and combined, so that the number of parts is large, the accumulated error is large, and the assembly efficiency is low.
In order to solve the above problems, as shown in fig. 1 to 8, the present embodiment provides an end structure of a fuel cell stack, including an end plate 1, a current collecting plate 2, a flexible pad 3, and a gas diffusion layer 4, where the end plate 1 is provided with a mounting groove 11, and the current collecting plate 2 is arranged in the mounting groove 11; the flexible pad 3 is clamped between the current collecting plate 2 and the end plate 1, and two sides of the flexible pad 3 are respectively bonded with the end plate 1 and the current collecting plate 2; the gas diffusion layer 4 is adhered to the collector plate 2, so that the dislocation of the gas diffusion layer 4 and a bipolar plate reaction area can be avoided, and the electrical performance and the air tightness of the electric pile are ensured. The end plate 1, the current collecting plate 2 and the gas diffusion layer 4 are preassembled, the integration level of the end structure is improved, the end structure which is preassembled is assembled with the reactor core 5 of the fuel cell, the assembly efficiency of the fuel cell stack can be improved, the problems that the current collecting plate 2 and the gas diffusion layer 4 are displaced and the like can be solved, and the assembly precision is improved. Compared with the prior art, the end plate 1, the current collecting plate 2 and the gas diffusion layer 4 are preassembled, the number of parts is reduced, the weight of the electric pile is reduced, and the volume power density of the electric pile is improved.
Illustratively, the flexible pad 3 is provided with the back glue to connect the collecting plate 2 and the end plate 1, so that when the end structure is assembled with the reactor core 5, even if the collecting plate 2 is reversely buckled downwards, the problem that the collecting plate 2 is displaced and dislocated or falls off is avoided, and the assembly stability and safety are ensured. Alternatively, the gas diffusion layer 4 is also adhered to the current collecting plate 2 by a back adhesive, which is easy to handle.
In this embodiment, the gas diffusion layer 4 is made of carbon paper. In other embodiments, the gas diffusion layer 4 may also be a carbon cloth, which is not limited herein.
On the premise of not affecting the function of the gas diffusion layer 4, in order to bond the gas diffusion layer 4 with the collector plate 2, the area of the gas diffusion layer 4 needs to be increased, so that the usage amount of the gas diffusion layer 4 is increased, and the cost is increased. The plastic sealing edge 41 is arranged at the edge of the gas diffusion layer 4 and is bonded with the current collecting plate 2 through the plastic sealing edge 41, so that the area of the gas diffusion layer 4 coated by the plastic sealing edge 41 is small, the excessive increase of the area of the gas diffusion layer 4 can be avoided, and the cost control is facilitated.
In this embodiment, the two ends of the gas diffusion layer 4 along the length direction of the bipolar plate are both provided with plastic sealing edges 41, so as to fix the two ends of the gas diffusion layer 4 and ensure the positioning stability of the gas diffusion layer 4.
Optionally, the collecting plate 2 is provided with a first positioning structure 21, the end plate 1 is provided with a first positioning matching structure 12, and the first positioning matching structure 12 can be matched with the first positioning structure 21 to position the collecting plate 2, so that the assembly accuracy of the collecting plate 2 and the end plate 1 is ensured.
Furtherly, two adjacent sides of current collector plate 2 all are equipped with location structure 21, and end plate 1 is equipped with the location fit structure 12 that sets up with two location structure 21 one-to-ones, so set up, when playing the positioning action to current collector plate 2, can also avoid current collector plate 2 to adorn anti-conversely, guarantee that current collector plate 2's utmost point ear orientation is correct, have and prevent slow-witted function.
Illustratively, one of the first positioning structure 21 and the second positioning structure 12 is a groove, and the other one is a protrusion, which can be inserted into the corresponding groove to position the collecting plate 2 and prevent the collecting plate 2 from being inversely installed. In this embodiment, the first positioning structure 21 is a groove formed in the collector plate 2, and the first positioning structure 12 is a protrusion formed in the end plate 1; of course, in other embodiments, the first positioning structure 21 may also be a protrusion provided on the collecting plate 2, and the second positioning structure 12 may also be a groove provided on the end plate 1.
Optionally, the current collecting plate 2 is provided with a second positioning structure 22 for positioning the gas diffusion layer 4, so as to ensure the assembly accuracy of the gas diffusion layer 4 and the current collecting plate 2. In this embodiment, the second positioning structure 22 is a positioning line disposed on the current collecting plate 2, for example, the positioning line may be formed by etching, and the edge of the gas diffusion layer 4 is aligned with the positioning line, so as to position the gas diffusion layer 4.
Optionally, the mounting groove 11 includes a first groove body 111 and a second groove body 112 sequentially communicated along a depth direction thereof, the current collecting plate 2 is disposed in the first groove body 111, and the flexible pad 3 is disposed in the second groove body 112. By the arrangement, the collector plate 2 is prevented from excessively protruding out of the surface of the end plate 1, so that the function of the end plate 1 is ensured, and the end plate 1 can provide pressing force for the reactor core 5.
Further, the shape of the first slot body 111 is the same as that of the current collecting plate 2, and the size of the first slot body 111 is the same as that of the current collecting plate 2, so that the first slot body 111 is used for positioning the current collecting plate 2, and the current collecting plate 2 is prevented from moving in the first slot body 111.
Further, the shape of the second groove body 112 is the same as that of the flexible pad 3, and the size of the second groove body 112 is the same as that of the flexible pad 3, so that the second groove body 112 plays a role in positioning the flexible pad 3, and the flexible pad 3 is prevented from moving in the second groove body 112.
Optionally, the flexible mat 3 is grid-like. So set up for flexible pad 3 can not only equipartition pile reactor core 5 pressure, improves current collector plate 2 atress, can also hold self and receive the deformation that the extrusion force produced, avoids the internal stress to concentrate and takes place the structure scheduling problem that breaks. In this embodiment, the flexible pad 3 is in a shape like a Chinese character jing, and has a simple structure and is easy to process.
Illustratively, the flexible pad 3 is a silica gel pad, and the silica gel pad has good high temperature resistance, low temperature resistance, voltage resistance and insulating property, meets the requirements of high and low temperature resistance and insulating voltage resistance of the fuel cell stack, and has better performance compared with other materials such as rubber.
Alternatively, the end plate 1 includes a metal plate 13 and an insulating plate 14 connected to one side of the metal plate 13, and the mounting groove 11 is provided in the insulating plate 14 to ensure insulation of the end plate 1.
It is understood that the fuel cell stack includes two end structures, in other words, the fuel cell stack includes two end plates 1, for convenience of description, the two end plates 1 are respectively referred to as a first end plate 1a and a second end plate 1b, and the first end plate 1a and the second end plate 1b are respectively disposed at two sides of the stack core 5 to clamp the stack core 5 through the first end plate 1a and the second end plate 1 b.
Optionally, the end plate 1 is provided with a plurality of through holes 15, the plurality of through holes 15 includes six reaction through holes 15a, and the six reaction through holes 15a are respectively four reaction gas through holes and two cooling liquid through holes provided in the end plate one 1a, and are used for the reaction gas and the cooling liquid to enter and exit the stack. Specifically, two of the reaction gas through holes and one of the cooling liquid through holes are formed in one end of the first end plate 1a, and the other two of the reaction gas through holes and the other one of the cooling liquid through holes are formed in the other end of the first end plate 1 a.
In this embodiment, the through hole 15 includes a first hole segment 151 and a second hole segment 152 that are communicated with each other and are disposed correspondingly, the first hole segment 151 is disposed on the insulating plate 14, the second hole segment 152 is disposed on the metal plate 13, and a first insulating layer 1521 that is in transition connection with the insulating plate 14 is disposed on an inner wall of the second hole segment 152, so as to ensure insulation of the end plate 1.
Further, with respect to the first end plate 1a, the insulating plate 14 is provided with an annular sealing groove 16, and the sealing groove 16 is provided around the outside of part of the through hole 15. In this embodiment, two sealing grooves 16 are provided, wherein one sealing groove 16 is surrounded at the outer sides of two of the reaction gas through holes and one of the cooling liquid through holes, and the other sealing groove 16 is surrounded at the outer sides of the other two of the reaction gas through holes and one of the cooling liquid through holes, so as to achieve a good sealing effect and prevent the reaction gas and the cooling liquid from leaking.
Optionally, for the second end plate 1b, the side of the metal plate 13 facing away from the insulating plate 14 is provided with a plurality of columns 131 for fitting elastic members to provide the pressing force.
Further, the second hole section 152 of one of the through holes 15 is disposed on one of the columns 131. It should be noted that the plurality of through holes 15 further include an exhaust through hole 15b provided in the end plate two 1b for stack exhaust, and in this embodiment, the second hole section 152 of the exhaust through hole 15b is provided in one of the columns 131, so that the assembly of the elastic member is not affected, the exhaust function is also achieved, and the layout optimization function is achieved.
Optionally, the second insulating layer 132 transitionally connected with the insulating plate 14 is provided on the peripheral side of the metal plate 13 of the second end plate 1b, so that the insulating property of the second end plate 1b is improved.
The embodiment also provides a fuel cell stack, which comprises a stack core 5 and two end structures of the fuel cell stack, wherein the end structures of the two fuel cell stacks are respectively arranged at two sides of the stack core 5 in the stacking direction.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (12)
1. An end structure of a fuel cell stack, comprising:
the end plate (1), the end plate (1) is provided with a mounting groove (11);
the collector plate (2) is arranged in the mounting groove (11);
the flexible pad (3) is clamped between the collector plate (2) and the end plate (1), and two sides of the flexible pad (3) are fixedly connected with the end plate (1) and the collector plate (2) respectively;
and the gas diffusion layer (4), wherein the gas diffusion layer (4) is adhered to the current collecting plate (2).
2. End structure of a fuel cell stack according to claim 1, characterized in that the gas diffusion layer (4) is provided with a plastic edge seal (41), and the plastic edge seal (41) is fixed to the collector plate (2) by means of gluing.
3. The end structure of a fuel cell stack according to claim 1, wherein the collector plate (2) is provided with a first positioning structure (21), the end plate (1) is provided with a first positioning engagement structure (12), and the first positioning engagement structure (12) is engageable with the first positioning structure (21) to position the collector plate (2);
and the current collecting plate (2) is provided with a second positioning structure (22) for positioning the gas diffusion layer (4).
4. The end structure of a fuel cell stack as defined in claim 1, wherein the mounting groove (11) comprises a first groove body (111) and a second groove body (112) which are sequentially communicated along a depth direction thereof, the current collecting plate (2) is disposed in the first groove body (111), and the flexible pad (3) is disposed in the second groove body (112).
5. The end structure of a fuel cell stack according to claim 4, wherein the shape of the first tank body (111) is the same as the shape of the current collecting plate (2), and the size of the first tank body (111) is the same as the size of the current collecting plate (2);
the shape of the second groove body (112) is the same as that of the flexible pad (3), and the size of the second groove body (112) is the same as that of the flexible pad (3).
6. End structure of a fuel cell stack according to claim 1, characterized in that the flexible mat (3) is grid-shaped.
7. End structure of fuel cell stack according to claim 1, characterized in that the end plate (1) comprises a metal plate (13) and an insulating plate (14) attached to one side of the metal plate (13), the mounting groove (11) being provided to the insulating plate (14).
8. The end structure of the fuel cell stack according to claim 7, wherein the end plate (1) is provided with a plurality of through holes (15), the through holes (15) comprise a first hole section (151) and a second hole section (152) which are communicated with each other and are correspondingly arranged, the first hole section (151) is arranged on the insulating plate (14), the second hole section (152) is arranged on the metal plate (13), and the inner wall of the second hole section (152) is provided with a first insulating layer (1521) which is in transition connection with the insulating plate (14).
9. End structure of a fuel cell stack according to claim 8, characterized in that the insulating plate (14) is provided with an annular sealing groove (16), said sealing groove (16) being provided around part of the outside of the through hole (15).
10. End structure of a fuel cell stack according to claim 8, characterized in that the side of the metal plate (13) facing away from the insulating plate (14) is provided with a number of columns (131);
the second hole section (152) of one through hole (15) is arranged on one column body (131).
11. End structure of fuel cell stack according to claim 7, characterized in that the peripheral side of the metal plate (13) is provided with a second insulating layer (132) transitionally connected with the insulating plate (14).
12. A fuel cell stack comprising a stack core (5) and two end structures of the fuel cell stack according to any one of claims 1 to 11, the end structures of the two fuel cell stacks being respectively provided on both sides of the stack core (5) in a stacking direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210945997.2A CN115189007A (en) | 2022-08-08 | 2022-08-08 | End structure of fuel cell stack and fuel cell stack |
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| CN202210945997.2A CN115189007A (en) | 2022-08-08 | 2022-08-08 | End structure of fuel cell stack and fuel cell stack |
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