CN117039038B - Packaging structure and assembling method of single fuel cell - Google Patents
Packaging structure and assembling method of single fuel cell Download PDFInfo
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- CN117039038B CN117039038B CN202310937149.1A CN202310937149A CN117039038B CN 117039038 B CN117039038 B CN 117039038B CN 202310937149 A CN202310937149 A CN 202310937149A CN 117039038 B CN117039038 B CN 117039038B
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 54
- 239000000446 fuel Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- 238000007789 sealing Methods 0.000 claims abstract description 125
- 239000012528 membrane Substances 0.000 claims abstract description 59
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 65
- 239000007789 gas Substances 0.000 description 23
- 238000003825 pressing Methods 0.000 description 12
- 239000003292 glue Substances 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
-
- 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
- H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
-
- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1004—Fuel cells with solid electrolytes characterised by membrane-electrode assemblies [MEA]
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a packaging structure and an assembling method of a single cell of a fuel cell, and belongs to the technical field of fuel cell stack design. The polar plate of the packaging structure of the single fuel cell is provided with a double-side sealing groove structure. The upper side and the lower side of the air side sealing line of the packaging structure of the single fuel cell are adhered with adhesives, one side is adhered with a membrane electrode, and the other side is adhered with a polar plate. The packaging structure of the single cell of the fuel cell is adhered with a water side sealing line for press-fitting and sealing with other single cells.
Description
Technical Field
The invention belongs to the field of fuel cell stack design, and particularly relates to a packaging structure of a proton exchange membrane fuel cell stack single cell.
Background
The fuel cell is a power generation device for directly converting chemical energy in fuel and oxidant into electric energy through electrochemical reaction, and has the advantages of high energy conversion rate, no pollution and low noise. The fuel cell unit cell consists of a polar plate and a membrane electrode, and a plurality of unit cells are stacked to form a fuel cell stack. The cathode plate and the anode plate of the existing fuel cell are welded (for metal polar plates) or bonded (for graphite polar plates) to form bipolar plates, and then stacked and pressed with membrane electrodes to form a galvanic pile. For the existing single cell form of the fuel cell, the positioning requirement in the stacking process is higher, the performance of the pile performance is inconsistent in the stacking process, the difficulty in pile maintenance is high, and particularly the relative position deviation of the polar plate and the membrane electrode in the re-stacking process has great influence on the pile performance after maintenance.
Disclosure of Invention
In order to solve the problems of reducing the stacking difficulty, improving the stacking consistency, improving the maintainability and reducing the influence of disassembly and assembly on the performance, in the first aspect, the packaging structure of the single fuel cell according to some embodiments of the application comprises
Two groups of polar plate edge parts are distributed on two sides of the membrane electrode;
and the sealing gaskets are arranged between the edge parts of the electrode plates of each group and between the electrode plates and the membrane electrode.
According to the packaging structure of the single fuel cell in some embodiments of the present application, the polar plate border portion includes a first anode plate border portion, a first cathode plate border portion, a second anode plate border portion and a second cathode plate border portion, where the first anode plate border portion and the first cathode plate border portion are oppositely arranged in parallel and partially contradicted, and the second anode plate border portion and the second cathode plate border portion are oppositely arranged in parallel and partially contradicted.
According to the packaging structure of the single fuel cell in some embodiments of the present application, the edge portion of the first anode plate includes a first straight Duan Yi, a first upper protruding section, a first lower protruding section, a first upper protruding section two, and a first straight Duan Er that are sequentially connected or integrally formed, wherein the upper protruding top ends of the first upper protruding section one and the first upper protruding section two are planar and have the same height, the first lower protruding section is connected between the first upper protruding section one and the first upper protruding section two and is in a lower protruding state relative to the first upper protruding section one and the first upper protruding section two, the lower protruding bottom end of the first lower protruding section is planar, and the lower protruding bottom end of the first lower protruding section is vertically higher than the first straight Duan Yi and the first straight Duan Er;
The edge part of the first cathode plate comprises a first straight Duan Yi, a first lower convex section I, a first upper convex section, a first lower convex section II and a first straight Duan Er which are sequentially connected or integrally formed, wherein the lower convex bottom ends of the first lower convex section I and the first lower convex section II are planar and have the same height, the first upper convex section is connected between the first lower convex section I and the first lower convex section II and is in an upper convex state relative to the first lower convex section I and the first lower convex section II, the upper convex top end of the first lower convex section is planar, and the upper convex top end of the first upper convex section is vertically lower than the first straight Duan Yi and the first straight Duan Er;
the edge part of the second anode plate comprises a second straight Duan Yi, a first second upper convex section, a second lower convex section, a second upper convex section and a second straight Duan Er which are sequentially connected or integrally formed, wherein the upper convex top ends of the first second upper convex section and the second upper convex section are planar and have the same height, the second lower convex section is connected between the first second upper convex section and the second upper convex section and is in a lower convex state relative to the first second upper convex section and the second upper convex section, the lower convex bottom end of the second lower convex section is planar, and the lower convex bottom end of the second lower convex section is vertically higher than the second straight Duan Yi and the second straight Duan Er;
The edge part of the second cathode plate comprises a second straight Duan Yi, a second lower convex section I, a second upper convex section, a second lower convex section II and a second straight Duan Er which are sequentially connected or integrally formed, wherein the lower convex bottom ends of the second lower convex section I and the second lower convex section II are planar and have the same height, the second upper convex section is connected between the second lower convex section I and the second lower convex section II and is in an upper convex state relative to the second lower convex section I and the second lower convex section II, the upper convex top end of the second upper convex section is planar, and the lower convex top end of the second upper convex section is vertically lower than the second straight Duan Yi and the second straight Duan Er;
the first straight section one of the first anode plate is in parallel and opposite arrangement with the first straight section one of the first cathode plate and is in conflict with the first straight section one of the first cathode plate through an opposite surface, the first straight Duan Er of the first anode plate is in parallel and opposite arrangement with the first straight section one of the first cathode plate and is in conflict with the first straight section one of the first cathode plate through an opposite surface, the first upper convex section one of the first anode plate is in parallel and opposite arrangement with the first lower convex section one of the first cathode plate and is formed into a first water cavity for containing water, the first upper convex section two of the first anode plate is in parallel and opposite arrangement with the first lower convex section of the first cathode plate and is formed into a first air cavity for containing air, the first lower convex section of the first anode plate is in parallel and opposite arrangement with the first upper convex section of the first cathode plate, the lower convex bottom end of the first lower convex section of the first anode plate is vertically higher than the first straight Duan Yi, the first straight Duan Er and the upper convex top end of the first upper convex section of the first cathode plate are vertically lower than the first straight Duan Yi and the first straight Duan Er, so that a first water side seal accommodating space for accommodating a first water side seal which prevents a first water cavity from communicating with a first air cavity is formed by the first lower convex section of the first anode plate and the first upper convex section of the first cathode plate relatively, the first water side seal is arranged in the first water side seal accommodating space, the upper end face of the first water side seal is in contact with the first lower convex section of the first anode plate, and the lower end face of the first water side seal is connected with the first upper convex section of the first cathode plate;
The lower convex bottom end of the plane of the first lower convex section I of the first cathode plate and the lower convex bottom end of the plane of the first lower convex section II of the first cathode plate are arranged oppositely in parallel with the membrane electrode and are connected through opposite surfaces, the first upper convex section of the first cathode plate is connected between the first lower convex section I and the first lower convex section II to be in an upper convex state relative to the first lower convex section I and the first lower convex section II, the upper convex top end of the first upper convex section is a plane, so that a first upper convex section of the first cathode plate and the membrane electrode form a first gas side sealing accommodating space for accommodating a first gas side sealing gasket which blocks gas from passing through a cavity in an opposite manner, the upper end surface of the first gas side sealing gasket is connected with the first upper convex section of the first cathode plate, and the lower end surface of the first gas side sealing gasket is connected with the upper end surface of the membrane electrode;
the first flat section of the second anode plate is in parallel and opposite arrangement with the second flat section of the second cathode plate and is in conflict with the second flat section of the second cathode plate through an opposite surface, the second flat Duan Er of the second anode plate is in parallel and opposite arrangement with the second flat section of the second cathode plate and is in conflict with the second flat section of the second cathode plate through an opposite surface, the second upper convex section of the second anode plate is in parallel and opposite arrangement with the second lower convex section of the second cathode plate and forms a second water cavity for containing water, the second upper convex section of the second anode plate is in parallel and opposite arrangement with the second lower convex section of the second cathode plate and is formed into a second air cavity for containing air, the second lower convex section of the second anode plate is in parallel and opposite arrangement with the second upper convex section of the second cathode plate, the lower convex bottom end of the second lower convex section of the second anode plate is vertically higher than the second straight Duan Yi, the second straight Duan Er and the upper convex top end of the second upper convex section of the second cathode plate, and is vertically lower than the second straight Duan Yi and the second straight Duan Er, so that a second water side sealing accommodating space for accommodating a second water side sealing gasket which prevents the second water cavity from communicating with the second air cavity is formed between the second lower convex section of the second anode plate and the second upper convex section of the second cathode plate, the second water side sealing gasket is arranged in the second water side sealing accommodating space, the upper end face of the second water side sealing gasket is in contact with the second lower convex section of the second anode plate, and the lower end face of the second water side sealing gasket is connected with the second upper convex section of the second cathode plate;
The upper protruding top end of the plane of the first upper protruding section of the second anode plate and the upper protruding top end of the plane of the second upper protruding section of the second anode plate are arranged in parallel and opposite to the membrane electrode and are connected through opposite surfaces, the second upper protruding section of the second anode plate is connected between the first upper protruding section and the second upper protruding section of the second anode plate, the second upper protruding section of the second anode plate is in a lower protruding state relative to the first upper protruding section of the second anode plate, the lower protruding bottom end of the second lower protruding section is a plane, so that a second gas side seal accommodating space for accommodating blocking gas passing through the second gas side seal pad of the cavity is formed by the second lower protruding section of the second anode plate, the upper end face of the second gas side seal pad is connected with the lower end face of the membrane electrode, and the lower end face of the second gas side seal pad is connected with the second lower protruding section of the second anode plate.
According to the packaging structure of the single fuel cell of some embodiments of the application, the connection between the lower end surface of the first water side sealing gasket and the first upper convex section of the first cathode plate is bonding; the lower convex bottom end of the plane of the first lower convex section I of the first cathode plate and the lower convex bottom end of the plane of the second lower convex section II of the first cathode plate are arranged oppositely in parallel with the membrane electrode and are connected through opposite surfaces for bonding; the upper end face of the first air side sealing gasket is bonded with the first upper convex section of the first cathode plate, and the lower end face of the first air side sealing gasket is bonded with the upper end face of the membrane electrode;
The lower end surface of the second water side sealing gasket is connected with the second upper convex section of the second cathode plate in a bonding way; the upper convex top end of the plane of the first upper convex section of the second anode plate and the upper convex top end of the plane of the second upper convex section of the second anode plate are arranged oppositely in parallel with the membrane electrode and are connected through opposite surfaces to be bonded; the upper end face of the second air side sealing gasket is bonded with the lower end face of the membrane electrode, and the lower end face of the second air side sealing gasket is bonded with the second lower convex section of the second anode plate.
According to the packaging structure of the single cell of the fuel cell of some embodiments of the present application, the length of the first water side sealing gasket in the horizontal direction exceeds the first lower convex section of the first anode plate and the first upper convex section of the first cathode plate, and the two ends of the first water side sealing gasket in the horizontal direction are respectively accommodated in the first water cavity and the first air cavity, and the two ends of the first water side sealing gasket are accommodated in the first water cavity and the part in the first air cavity, and the horizontal length of the first water side sealing gasket is not more than half of the horizontal length of the first water cavity and the first air cavity.
According to the packaging structure of the single cell of the fuel cell of some embodiments of the present application, the horizontal length of the second water side sealing pad exceeds the second lower convex section of the second anode plate and the second upper convex section of the second cathode plate, and the two ends of the second water side sealing pad are respectively accommodated in the second water cavity and the second air cavity, and the two ends of the second water side sealing pad are accommodated in the second water cavity and the part in the second air cavity, and the horizontal length of the second water side sealing pad is not more than half of the horizontal length of the second water cavity and the second air cavity.
According to some embodiments of the present application, the first air-side gasket has a horizontal length substantially equal to or smaller than a horizontal length of an upper convex top end of the first upper convex section of the first cathode plate, and the second air-side gasket has a horizontal length substantially equal to or smaller than a horizontal length of a lower convex bottom end of the second lower convex section of the second anode plate.
In a second aspect, a method of assembling a packaging structure of a fuel cell unit cell according to some embodiments of the present application includes laminating and press-fitting each minimum assembled unit cell in a galvanic pile press-fitting, wherein the minimum assembled unit cell includes a cathode plate rim portion, a first water side gasket, a first air side gasket, a membrane electrode, a second air side gasket, an anode plate rim portion, and a water side gasket of the packaging structure.
According to some embodiments of the present application, the method of assembling the packaging structure of any of the fuel cell unit cells, for the packaging structure in between: the edge part of the anode plate of the second packaging structure is aligned with the edge part of the cathode plate of the first packaging structure, the water side sealing gasket is arranged between the first lower convex section of the edge part of the anode plate of the second packaging structure and the first upper convex section of the edge part of the cathode plate of the first packaging structure, and the water side sealing gasket is in contact with the first lower convex section of the edge part of the anode plate of the second packaging structure and is connected with the first upper convex section of the edge part of the cathode plate of the first packaging structure;
the edge part of the cathode plate of the third packaging structure is aligned with the edge part of the anode plate of the first packaging structure, the water side sealing gasket is arranged between the second lower convex section of the edge part of the anode plate of the first packaging structure and the first upper convex section of the edge part of the cathode plate of the third packaging structure, and the water side sealing gasket is connected with the second lower convex section of the edge part of the anode plate of the first packaging structure and is in contact with the first upper convex section of the edge part of the cathode plate of the third packaging structure.
According to some embodiments of the present application, the method for assembling the package structure of the fuel cell unit cell of any one of the embodiments is, for the package structure at both ends: the water side sealing gasket of the packaging structure at the lowest end is connected between the second lower convex section of the edge part of the anode plate and the first upper convex section of the edge part of one cathode plate;
The water side sealing gasket of the uppermost packaging structure is connected between the first lower convex section of the edge part of the anode plate and the first upper convex section of the edge part of the cathode plate of the first packaging structure.
The beneficial effects are that: the minimum assembly unit layer is laminated and pressed, and for the integral packaging structure of the electric pile formed by laminating and pressing the packaging structure of the single cell, the membrane electrode is taken as a symmetrical center, and the edge parts (grooves) of the polar plates are mutually positioned. This adjustment eliminates the need for positioning and alignment of the membrane electrode with the edge of the plate in the packaging structure of the same group during the press stack assembly process. And the packaging structures of different groups are arranged relatively due to small area of the edge part (groove) of the polar plate when being aligned, so that the alignment difficulty is low, the alignment is easy, and the phenomenon that the second groove in the very small area faces the whole paved membrane electrode with a quite large surface area and is difficult to accurately position the pasting position is avoided.
The existing pole plate bottom surface is directly bonded by glue, so that the bonding effect is possibly worse along with time and severe environment in the use environment, and secondly, in the bonding process, the glue is easy to overflow the flat bottom surface to cause the influence of other parts. The invention always has the effect of pressing force after pressing the stack, the pressing force is used for acting on the sealing gasket all the time, even if the sealing gasket is in failure of glue, the sealing gasket still keeps tight connection with the polar plates, the problem of flat bottom bonding is solved, and the invention does not use the direction opposite to the direction of the convex to remanufacture the convex, therefore, the process is not very complicated until the space between the polar plates and the membrane electrode is required to be occupied, the horizontal length of the sealing gasket between the polar plates is greatly reduced, the sealing effect is reduced, and the like.
The invention can reduce the stacking difficulty, improve the stacking consistency, improve the maintainability and reduce the influence of disassembly and assembly on the performance.
Drawings
Fig. 1 is a schematic diagram of a test of a package structure of a single fuel cell in an embodiment;
fig. 2 is a schematic diagram of a test of a package structure of another fuel cell unit cell in the embodiment;
FIG. 3 is a schematic view of a first anode;
FIG. 4 is a first cathode schematic;
FIG. 5 is a second anode schematic;
FIG. 6 is a second cathode schematic;
fig. 7 is a plate having a fuel cell package structure.
101. The first groove, 102, the second groove, 103, the first sealing gasket, 104, the second sealing gasket, 105, the first membrane electrode, 106, the second membrane electrode;
211. the first anode plate, 212, the first cathode plate, 213, the first water side gasket, 214, the first air side gasket, 215, the membrane electrode, 216, the second cathode plate, 217, the second anode plate, 218, the second water side gasket, 219, the second air side gasket;
3-1 periphery;
311. first straight section one, 312, first upper convex section one, 313, first lower convex section, 314, first upper convex section two, 315, first straight section two.
321. First straight section one, 322, first lower convex section one, 323, first upper convex section, 324, first lower convex section two, 325, first straight section two.
331. Second straight section one, 332, second upper convex section one, 333, second lower convex section, 334, second upper convex section two, 335, second straight section two.
341. Second straight segment one, 342, second lower convex segment one, 343, second upper convex segment, 344, second lower convex segment two, 345, second straight segment two.
Detailed Description
Embodiments of the present invention will be further described below with reference to the accompanying drawings, and advantages and features of the present invention will be more apparent from the description.
As shown in fig. 1, in the package structure of the conventional fuel cell unit cell, the bottoms of the first groove 101 and the second groove 102 are welded to form a bipolar plate, the first sealing gasket 103 and the second sealing gasket 104 are bonded to the bottoms of the first groove 101 and the second groove 102 through glue, and the minimum unit is two, namely, a bipolar plate assembly formed by welding and bonding the first groove 101, the second groove 102, the first sealing gasket 103 and the second sealing gasket 104, and the first membrane electrode 105 (MEA), and the two are independent two units in the conventional structure, wherein the sealing gaskets are not bonded with the MEA, are only placed, and are completely placed by the placement position to ensure the relative positions of the polar plates and the MEA, so that the stacking difficulty is increased. The minimum assembly units refer to products which are assembled and formed by leaving factories, and in the pile press-fitting process, each minimum assembly unit layer is laminated and press-fitted.
As shown in fig. 2, the packaging structure of the single fuel cell of the present invention in another embodiment includes a first anode plate 211 edge portion, a first cathode plate 212 edge portion, a first air side gasket 214, a first water side gasket 213, a second anode plate 217 edge portion, a second cathode plate 216 edge portion, a second air side gasket 219, and a second water side gasket 218.
As shown in fig. 3, the edge portion of the first anode plate 211 includes a first straight segment 311, a first upper protruding segment 312, a first lower protruding segment 313, a first upper protruding segment 314, and a first straight Duan Er 315 that are sequentially connected or integrally formed, wherein the upper protruding top ends of the first upper protruding segment 312 and the first upper protruding segment 314 are planar and have the same height, the first lower protruding segment 313 is connected between the first upper protruding segment 312 and the first upper protruding segment 314 and is in a lower protruding state relative to the first upper protruding segment 312 and the first upper protruding segment 314, the lower protruding bottom end of the first lower protruding segment 313 is planar, and the lower protruding bottom end of the first lower protruding segment 313 is vertically higher than the first straight segment 311 and the first straight Duan Er 315.
As shown in fig. 4, the edge portion of the first cathode plate 212 includes a first straight segment 321, a first lower protruding segment 322, a first upper protruding segment 323, a first lower protruding segment second 324, and a first straight Duan Er 325 that are sequentially connected or integrally formed, wherein the lower protruding bottom ends of the first lower protruding segment 322 and the first lower protruding segment second 324 are planar and have the same height, the first upper protruding segment 323 is connected between the first lower protruding segment 322 and the first lower protruding segment second 324 and is in an upper protruding state relative to the first lower protruding segment 322 and the first lower protruding segment second 324, the upper protruding top end of the first lower protruding segment 313 is planar, and the upper protruding top end of the first upper protruding segment 323 is vertically lower than the first straight segment 321 and the first straight Duan Er.
As shown in fig. 5, the edge portion of the second anode plate 217 includes a first flat segment 331, a first second upper convex segment 332, a second lower convex segment 333, a second upper convex segment 334, and a second flat Duan Er 335, which are sequentially connected or integrally formed, wherein the upper convex top ends of the first upper convex segment 332 and the second upper convex segment 334 are planar and have the same height, the second lower convex segment 333 is connected between the first upper convex segment 332 and the second upper convex segment 334 and is in a lower convex state relative to the first upper convex segment 332 and the second upper convex segment 334, the lower convex bottom end of the second lower convex segment 333 is planar, and the lower convex bottom end of the second lower convex segment 333 is vertically higher than the first flat segment 331 and the second flat Duan Er 335.
As shown in fig. 6, the edge portion of the second cathode plate 216 includes a first flat segment 341, a first lower convex segment 342, a second upper convex segment 343, a second lower convex segment second 344, and a second flat Duan Er 345, which are sequentially connected or integrally formed, wherein the lower convex bottom ends of the first lower convex segment 342 and the second lower convex segment second 344 are planar and have the same height, the second upper convex segment 343 is connected between the first lower convex segment 342 and the second lower convex segment second 344 and is in an upper convex state relative to the first lower convex segment 342 and the second lower convex segment second 344, the upper convex top end of the second upper convex segment 343 is planar, and the lower convex top end of the second upper convex segment 343 is vertically lower than the first flat segment 341 and the second flat Duan Er 345.
The first flat section one 311 of the first anode plate 211 is arranged in parallel and opposite to the first flat section one 321 of the first cathode plate 212 and is abutted by the opposite surface, the first flat Duan Er 315 of the first anode plate 211 is arranged in parallel and opposite to the first flat Duan Er of the first cathode plate 212 and is abutted by the opposite surface, the first upper convex section one 312 of the first anode plate 211 is arranged in parallel and opposite to the first lower convex section one 322 of the first cathode plate 212 and is formed into a first water cavity for containing water, the first upper convex section two 314 of the first anode plate 211 is arranged in parallel and opposite to the first lower convex section two 324 of the first cathode plate 212 and is formed into a first air cavity for containing gas, the first lower convex section 313 of the first anode plate 211 is arranged in parallel and opposite to the first upper convex section 323 of the first cathode plate 212, by means of the lower convex bottom end of the first lower convex section 313 of the first anode plate 211 being vertically higher than the first straight section 311 and the first straight section Duan Er 315 and the upper convex top end of the first upper convex section 323 of the first cathode plate 212 being vertically lower than the first straight section 321 and the first straight section Duan Er, the first lower convex section 313 of the first anode plate 211 and the first upper convex section 323 of the first cathode plate 212 are opposite to form a first water side sealing accommodating space for accommodating the first water side sealing pad 213 which prevents the first water cavity from communicating with the first air cavity, the first water side sealing pad 213 is arranged in the first water side sealing accommodating space, the upper end face of the first water side sealing pad 213 is in contact with the first lower convex section 313 of the first anode plate 211, and the lower end face of the first water side sealing pad 213 is connected with the first upper convex section 323 of the first cathode plate 212, preferably in adhesion. The interference in the present invention means that there is no bonding, and the interference is fixed only by pressing.
The length of the first water side sealing pad 213 in the horizontal direction exceeds the first lower convex section 313 of the first anode plate 211 and the first upper convex section 323 of the first cathode plate 212, and the two ends of the first water side sealing pad 213 in the horizontal direction are respectively accommodated in the first water cavity and the first air cavity, and the two ends of the first water side sealing pad 213 are accommodated in the parts of the first water cavity and the first air cavity, and the horizontal length of the parts is not more than half of the horizontal length of the first water cavity and the first air cavity. According to the scheme, the water cavity is communicated with the water flow channel of the single battery, water in the water flow channel in the middle of the single battery can enter the water cavity through the polar plate connecting gap, but water cannot enter the air cavity due to the obstruction of the water side sealing gasket, and the water cavity can be communicated with the water outlet on the polar plate of the single battery, so that water in the water flow channel in the middle of the single battery can be discharged through the polar plate connecting gap into the water cavity. Similarly, ambient air may enter the air chamber through the plate connection gap, however, it cannot enter the water chamber due to the obstruction of the gasket, and thus cannot enter the interior from the rim portion.
The lower convex bottom end of the plane of the first lower convex section one 322 of the first cathode plate 212 and the lower convex bottom end of the plane of the first lower convex section two 324 of the first cathode plate 212 are arranged in parallel and opposite to the membrane electrode 215 and are connected with opposite surfaces, preferably bonded, by connecting the first upper convex section 323 of the first cathode plate 212 between the first lower convex section one 322 and the first lower convex section two 324 and in an upper convex state relative to the first lower convex section one 322 and the first lower convex section two 324, the upper convex top end of the first upper convex section 323 is a plane, so that the first upper convex section 323 of the first cathode plate 212 and the membrane electrode 215 are opposite to form a first air side sealing accommodating space for accommodating the first air side sealing gasket 214 blocking the air from passing through the cavity, and the upper end surface of the first air side sealing gasket 214 is connected with the first upper convex section 323 of the first cathode plate 212, preferably bonded, and the lower end surface of the first air side sealing gasket 214 is connected with the upper end surface of the membrane electrode 215.
The first gas side gasket 214 has a horizontal length that is substantially equal to or slightly less than the horizontal length of the upper convex top end of the first upper convex section 323 of the first cathode plate 212. According to the above scheme, even if the hydrogen of the single battery and the air and the hydrogen in the air channel break through the pole plate gap, the hydrogen cannot leak out due to the obstruction of the air side sealing gasket, and the air in the environment is also obstructed by the air side sealing gasket and cannot enter the inside.
The first flat section 331 of the second anode plate 217 is disposed in parallel and opposite to the first flat section 341 of the second cathode plate 216 and is abutted by an opposite surface, the second flat Duan Er 335 of the second anode plate 217 is disposed in parallel and opposite to the second flat Duan Er 345 of the second cathode plate 216 and is abutted by an opposite surface, the second upper convex section 332 of the second anode plate 217 is disposed in parallel and opposite to the second lower convex section 342 of the second cathode plate 216 and is formed to accommodate a second water chamber of water, the second upper convex section 334 of the second anode plate 217 is disposed in parallel and opposite to the second lower convex section 344 of the second cathode plate 216 and is formed to accommodate a second air chamber of gas, the second lower convex section 333 of the second anode plate 217 is disposed in parallel and opposite to the second upper convex section 343 of the second cathode plate 216, by means of the lower protruding bottom end of the second lower protruding section 333 of the second anode plate 217 being vertically higher than the first flat section 331, the second flat Duan Er 335 and the upper protruding top end of the second upper protruding section 343 of the second cathode plate 216 being vertically lower than the first flat section 341, the second flat Duan Er 345, the second lower protruding section 333 of the second anode plate 217 and the second upper protruding section 343 of the second cathode plate 216 are opposite to form a second water side sealing accommodating space for accommodating the second water side sealing pad 218 that blocks the communication between the second water cavity and the second air cavity, the second water side sealing pad 218 is disposed in the second water side sealing accommodating space, and the upper end surface of the second water side sealing pad 218 is in contact with the second lower protruding section 333 of the second anode plate 217, and the lower end surface of the second water side sealing pad 218 is connected, preferably bonded, with the second upper protruding section 343 of the second cathode plate 216.
The horizontal length of the second water side sealing pad 218 exceeds the second lower protruding section 333 of the second anode plate 217 and the second upper protruding section 343 of the second cathode plate 216, and the two ends of the second water side sealing pad 218 are respectively accommodated in the second water cavity and the second air cavity, and the horizontal length of the part of the two ends of the second water side sealing pad 218 accommodated in the second water cavity and the second air cavity is not more than half of the horizontal length of the second water cavity and the second air cavity. According to the scheme, the water cavity is communicated with the water flow channel of the single battery, water in the water flow channel in the middle of the single battery can enter the water cavity through the polar plate connecting gap, but water cannot enter the air cavity due to the obstruction of the water side sealing gasket, and the water cavity can be communicated with the water outlet on the polar plate of the single battery, so that water in the water flow channel in the middle of the single battery can be discharged through the polar plate connecting gap into the water cavity. Similarly, ambient air may enter the air chamber through the plate connection gap, however, it cannot enter the water chamber due to the obstruction of the gasket, and thus cannot enter the interior from the rim portion.
The upper convex top end of the plane of the first upper convex section 332 of the second anode plate 217 and the upper convex top end of the plane of the second upper convex section 334 of the second anode plate 217 are arranged in parallel and opposite to the membrane electrode 215 and are connected with opposite surfaces, preferably bonded, the second lower convex section 333 of the second anode plate 217 is connected between the first upper convex section 332 and the second upper convex section 334 and is in a downward convex state relative to the first upper convex section 332 and the second upper convex section 334, the lower convex bottom end of the second lower convex section 333 is a plane, so that the second lower convex section 333 of the second anode plate 217 and the membrane electrode 215 are opposite to form a second gas side sealed containing space for containing a second gas side sealing gasket 219 blocking gas from passing through the cavity, and the upper end surface of the second gas side sealing gasket 219 is connected with the lower end surface of the membrane electrode 215, preferably bonded, and the lower end surface of the second gas side sealing gasket 219 is abutted against the second lower convex section 333 of the second anode plate 217.
The second gas side gasket 219 has a horizontal length that is substantially equal to or slightly less than the horizontal length of the lower convex bottom end of the second lower convex section 333 of the second anode plate 217. According to the above scheme, even if the hydrogen of the single battery and the air and the hydrogen in the air channel break through the pole plate gap, the hydrogen cannot leak out due to the obstruction of the air side sealing gasket, and the air in the environment is also obstructed by the air side sealing gasket and cannot enter the inside.
In the second aspect, for the packaging structure, the cathode plate edge portion, the first air side gasket 214, the membrane electrode 215, the second air side gasket 219, the anode plate edge portion, and the water side gasket of the packaging structure belong to the minimum assembly unit, and the minimum assembly unit refers to a product assembled and formed by leaving a factory, and in the galvanic pile press-fitting, each minimum assembly unit is laminated and press-fitted. It will be appreciated that the description of the present embodiment with respect to the cathode plate rim portion and the anode plate rim portion contemplates that they are rim portions of the electrode plates, and that the entire electrode plates, MEA, and gasket are bonded together by a localized arrangement of this type.
The anode plate edge portion (first anode plate 211 edge portion) of the second package structure is aligned with the cathode plate edge portion (first cathode plate 212 edge portion) of the first package structure, the water side gasket (first water side gasket 213) is disposed between the first lower convex segment 313 of the anode plate edge portion (first anode plate 211 edge portion) of the second package structure and the first upper convex segment 323 of the cathode plate edge portion (first cathode plate 212 edge portion) of the first package structure, and the water side gasket (first water side gasket 213) is in contact with the first lower convex segment 313 of the anode plate edge portion (first anode plate 211 edge portion) of the second package structure, and is connected, preferably bonded, with the first upper convex segment 323 of the cathode plate edge portion (first cathode plate 212 edge portion) of the first package structure.
The cathode plate edge portion (second cathode plate 216 edge portion) of the third package structure is aligned with the anode plate edge portion (second anode plate 217 edge portion) of the first package structure, the water side gasket (second water side gasket 218) is disposed between the second lower convex section 333 of the anode plate edge portion (second anode plate 217 edge portion) of the first package structure and the first upper convex section 343 of the cathode plate edge portion (second cathode plate 216 edge portion) of the third package structure, and the water side gasket (second water side gasket 218) is in contact with the second lower convex section 333 of the anode plate edge portion (second anode plate 217 edge portion) of the first package structure, and is connected, preferably bonded, with the first upper convex section 343 of the cathode plate edge portion (second cathode plate 216 edge portion) of the third package structure.
And assembling the packaging structure in the middle by the assembly mode.
For the package structure at both ends, the water side gasket (second water side gasket 218) of the package structure at the lowermost end is connected (preferably bonded) between the second lower convex section 333 of the anode plate rim portion (second anode plate 217 rim portion) and the first upper convex section 323 of one cathode plate rim portion (third cathode plate rim portion). The water side gasket (first water side gasket 213) of the uppermost package structure is connected (preferably bonded) between the first lower convex section 313 of the anode plate edge (first anode plate 211 edge) and the first upper convex section 323 of the cathode plate edge (first cathode plate 212 edge) of the first package structure.
Thereby, a complete package structure is assembled.
In the second scheme, the minimum assembly unit layer is laminated and pressed, and for the integral packaging structure of the electric pile formed by laminating and pressing the packaging structure of the single cell, the packaging structure of the single cell is positioned with the electrode plate as a symmetrical center, the membrane electrode 215 is used as a pressing positioning main body to actively position the first groove 101, and the mode of positioning the edge parts (grooves) of the electrode plate with each other is changed into the mode of using the membrane electrode 215 as the symmetrical center. This adjustment eliminates the need for the membrane electrode 215 to be aligned with the edge of the plate during the press stack assembly process for the same group of packages. And the package structures of different groups are aligned because the edge parts (grooves) of the polar plates are small in area and are arranged oppositely, so that the alignment difficulty is low, the alignment is easy, and the phenomenon that the second grooves 102 of the very small areas of the first scheme are opposite to the whole paved membrane electrode 215 with quite large surface area, so that the paste position is difficult to accurately position is avoided.
In the second solution, compared with the first solution in which the bottom surfaces of the plates are directly bonded by glue, the inventors found that after stacking is completed, the stability of the connection between the two plates affects the water-side sealing performance, and then the flat-bottom bonding method makes the stability of the connection between the two plates mainly affected by the glue, while the firmness of the glue bonding is greatly affected by the environment, so that the bonding effect may be worse and worse with time and severe environment in the use environment, and secondly, in the bonding process, the flat-bottom bonding easily causes the glue to overflow the flat-bottom surfaces to cause other part of the influence.
Since the present invention always has a pressing force after stacking, if it is able to use this pressing force, it is possible to apply one pressing force to the gasket, so that the gasket still maintains a tight connection with the plate even in the case of glue failure, and this problem of flat bottom adhesion is possibly solved, and obviously this finding is unexpected, however, in the second solution described above, it is designed with the membrane electrode 215 as the center of symmetry and with the plate edge portions (grooves) positioned with respect to each other, and therefore, this means that in the second solution, the plate is connected with the membrane electrode 215 by the gasket, so that the plate is already protruded in the direction of plate connection, whereas in the solution described above for adding the gasket, it is necessary to remanufacture the protrusion in the direction opposite to the protrusion, on the one hand, it is necessary to occupy the space for installing the gasket between the plate and the membrane electrode 215, and secondly the process becomes very complicated, and so that the horizontal length of the gasket between the plates is extremely reduced, and the sealing effect is reduced. For this reason, the modified route is illustrated by the first anode plate 211 and the first cathode plate 212, and the modified route of the second anode plate 217 and the second cathode plate 216 are the same, and will not be described again. The second embodiment of the present invention is that the lower convex bottom end of the first lower convex segment 313 of the first anode plate 211 is vertically higher than the first straight segment 311, the first straight Duan Er and the upper convex top end of the first upper convex segment 323 of the first cathode plate 212 is vertically lower than the first straight segment 311, the first straight Duan Er, and by the alternation of such straight segments and convex segments of the polar plate and the height difference between the straight segments formed, as shown in fig. 3, h1 is the height of the lower convex segment, h2 is the height of the upper convex segment, h3 is the height difference between the lower convex segment and the straight segment, and the heights of h1 and h2 can be changed according to design requirements. h3, the first lower convex section 313 of the first anode plate 211 and the first upper convex section 323 of the first cathode plate 212 are arranged relatively in parallel and are not attached, and the parallel relative distance exists between the first lower convex section 313 and the first upper convex section 323, so that a first water side sealing accommodating space for accommodating the first water side sealing gasket 213 which prevents the first water cavity from being communicated with the first air cavity is formed, and therefore, the invention realizes that the gasket structure can be replaced by the original structure of flat bottom adhesion of the polar plate without remanufacturing the bulge in the opposite direction of the bulge through the alternation of the flat sections of the polar plate and the height difference between the flat sections, so that the sealing is not greatly influenced by the environment any more, and the sealing gasket is kept to be permanently sealed by the pressing force after the pressing pile.
The length of the first sealing pad 103 in the horizontal direction exceeds the first lower convex section 313 of the first anode plate 211 and the first upper convex section 323 of the first cathode plate 212, and the two ends of the first water side sealing pad 213 are respectively accommodated in the first water cavity and the first air cavity, and the length of the first sealing pad in the horizontal direction does not exceed half of the length of the first water cavity and the first air cavity in the horizontal direction, so that the first anode plate 211 and the first cathode plate 212 are assembled in the press mounting process, and the means are implemented for reducing the positioning difficulty of the sealing pad and improving the sealing performance.
Thus, the package structure of the fuel cell unit of the present invention is a package structure formed by the edge of the corresponding fuel cell unit, specifically, the edge of the electrode plate, the edge of the membrane electrode 215 and the gasket, and thus, the package structure is distributed on the edge of the fuel cell unit.
In one scheme, in order to reduce the stacking difficulty, improve the stacking consistency, improve the maintainability and reduce the influence of disassembly and assembly on the performance, a double-side sealing groove structure is designed and processed through the polar plate, one side is used for being adhered with a gas side sealing line, and the other side is used for being adhered with a water side sealing line. The two sides of the air side sealing line are adhered with adhesive, one side is used for being adhered with the membrane electrode 215, the other side is used for being adhered with the polar plate, and the polar plate and the membrane electrode 215 are adhered into a whole through the air side sealing line, so that the relative positions of the polar plate and the membrane electrode 215 are not influenced by disassembly and assembly or different stacking processes. The cathode plate-air side seal line-membrane electrode 215-air side seal line-anode plate structures are bonded together by the double-sided rubberized air side seal line. And bonding a water side sealing line on the other side of the double-side sealing groove of the cathode plate or the anode plate to form a complete single cell structure. The plurality of single cells are pressed and sealed through a water side sealing line, and stacked to form a galvanic pile.
The polar plate of the packaging structure of the single fuel cell is provided with a double-side sealing groove structure, and the heights of the two side sealing grooves can be the same or different. The upper and lower sides of the gas side seal line of the packaging structure of the fuel cell unit cell are adhered with adhesive, one side is used for adhering the membrane electrode 215, and the other side is used for adhering the polar plate. The packaging structure of the single fuel cell consists of a polar plate with a double-sided sealing groove structure, a gas side sealing line with double-sided rubberizing, a water side sealing line and a membrane electrode 215. The packaging structure of the single cell of the fuel cell is adhered with a water side sealing line (only one side) for press-fitting and sealing with the polar plates of other single cells. The packaging structure of the fuel cell unit cell is located on the polar plate, and the example is located at the periphery of the polar plate, but is not limited to the position shown in the figure.
According to the illustration in fig. 3, the lower bead is a double sided seal groove, the lower bead acting as a gas side seal line and also as a water side seal line. As shown in fig. 2, the first anode plate 211, the first cathode plate 212, the second anode plate 217 and the second cathode plate 216 are plates having the double-sided seal groove structure, the two sides of the first air side gasket 214 are adhered with adhesive, the upper side of the first air side gasket is adhered with the first cathode plate 212, the lower side of the first air side gasket is adhered with the membrane electrode 215, and the second air side gasket 219 is adhered with the membrane electrode 215 and the second anode plate 217 through the double-sided adhesive. The other side of the first cathode plate 212 is adhered with a first water side sealing gasket 213, the other side of the second anode plate 217 is adhered with a second water side sealing gasket 218, and each single cell packaging structure comprises a water side sealing line for press-fitting sealing in cooperation with sealing grooves of other single cells. Fig. 7 shows an illustration of the location of the package structure, which is located at the periphery of the plate, but is not limited to the periphery of the plate.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the present invention, the term "and/or" describes an association relationship of an association object, which means that there may be three relationships, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one" means one or more; "at least one of a and B", similar to "a and/or B", describes an association relationship of an association object, meaning that there may be three relationships, for example, at least one of a and B may represent: a exists alone, A and B exist together, and B exists alone.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A packaging structure of a single cell of a fuel cell, characterized by comprising
Two groups of polar plate edge parts are distributed on two sides of the membrane electrode;
the sealing gaskets are arranged between the edge parts of the electrode plates of each group and between the electrode plates and the membrane electrode;
the electrode plate edge part comprises a first anode plate edge part, a first cathode plate edge part, a second anode plate edge part and a second cathode plate edge part, wherein the first anode plate edge part is arranged in parallel and opposite to the first cathode plate edge part and partially abuts against the first cathode plate edge part, and the second anode plate edge part is arranged in parallel and opposite to the second cathode plate edge part and partially abuts against the second cathode plate edge part;
the edge part of the first anode plate comprises a first straight Duan Yi, a first upper convex section I, a first lower convex section, a first upper convex section II and a first straight Duan Er which are sequentially connected or integrally formed, wherein the upper convex top ends of the first upper convex section I and the first upper convex section II are planar and have the same height, the first lower convex section is connected between the first upper convex section I and the first upper convex section II and is in a lower convex state relative to the first upper convex section I and the first upper convex section II, the lower convex bottom end of the first lower convex section is planar, and the lower convex bottom end of the first lower convex section is vertically higher than the first straight Duan Yi and the first straight Duan Er;
The edge part of the first cathode plate comprises a first straight Duan Yi, a first lower convex section I, a first upper convex section, a first lower convex section II and a first straight Duan Er which are sequentially connected or integrally formed, wherein the lower convex bottom ends of the first lower convex section I and the first lower convex section II are planar and have the same height, the first upper convex section is connected between the first lower convex section I and the first lower convex section II and is in an upper convex state relative to the first lower convex section I and the first lower convex section II, the upper convex top end of the first lower convex section is planar, and the upper convex top end of the first upper convex section is vertically lower than the first straight Duan Yi and the first straight Duan Er;
the edge part of the second anode plate comprises a second straight Duan Yi, a first second upper convex section, a second lower convex section, a second upper convex section and a second straight Duan Er which are sequentially connected or integrally formed, wherein the upper convex top ends of the first second upper convex section and the second upper convex section are planar and have the same height, the second lower convex section is connected between the first second upper convex section and the second upper convex section and is in a lower convex state relative to the first second upper convex section and the second upper convex section, the lower convex bottom end of the second lower convex section is planar, and the lower convex bottom end of the second lower convex section is vertically higher than the second straight Duan Yi and the second straight Duan Er;
The edge part of the second cathode plate comprises a second straight Duan Yi, a second lower convex section I, a second upper convex section, a second lower convex section II and a second straight Duan Er which are sequentially connected or integrally formed, wherein the lower convex bottom ends of the second lower convex section I and the second lower convex section II are planar and have the same height, the second upper convex section is connected between the second lower convex section I and the second lower convex section II and is in an upper convex state relative to the second lower convex section I and the second lower convex section II, the upper convex top end of the second upper convex section is planar, and the lower convex top end of the second upper convex section is vertically lower than the second straight Duan Yi and the second straight Duan Er;
the first straight section one of the first anode plate is in parallel and opposite arrangement with the first straight section one of the first cathode plate and is in conflict with the first straight section one of the first cathode plate through an opposite surface, the first straight Duan Er of the first anode plate is in parallel and opposite arrangement with the first straight section one of the first cathode plate and is in conflict with the first straight section one of the first cathode plate through an opposite surface, the first upper convex section one of the first anode plate is in parallel and opposite arrangement with the first lower convex section one of the first cathode plate and is formed into a first water cavity for containing water, the first upper convex section two of the first anode plate is in parallel and opposite arrangement with the first lower convex section of the first cathode plate and is formed into a first air cavity for containing air, the first lower convex section of the first anode plate is in parallel and opposite arrangement with the first upper convex section of the first cathode plate, the lower convex bottom end of the first lower convex section of the first anode plate is vertically higher than the first straight Duan Yi, the first straight Duan Er and the upper convex top end of the first upper convex section of the first cathode plate are vertically lower than the first straight Duan Yi and the first straight Duan Er, so that a first water side seal accommodating space for accommodating a first water side seal which prevents a first water cavity from communicating with a first air cavity is formed by the first lower convex section of the first anode plate and the first upper convex section of the first cathode plate relatively, the first water side seal is arranged in the first water side seal accommodating space, the upper end face of the first water side seal is in contact with the first lower convex section of the first anode plate, and the lower end face of the first water side seal is connected with the first upper convex section of the first cathode plate;
The lower convex bottom end of the plane of the first lower convex section I of the first cathode plate and the lower convex bottom end of the plane of the first lower convex section II of the first cathode plate are arranged oppositely in parallel with the membrane electrode and are connected through opposite surfaces, the first upper convex section of the first cathode plate is connected between the first lower convex section I and the first lower convex section II to be in an upper convex state relative to the first lower convex section I and the first lower convex section II, the upper convex top end of the first upper convex section is a plane, so that a first upper convex section of the first cathode plate and the membrane electrode form a first gas side sealing accommodating space for accommodating a first gas side sealing gasket which blocks gas from passing through a cavity in an opposite manner, the upper end surface of the first gas side sealing gasket is connected with the first upper convex section of the first cathode plate, and the lower end surface of the first gas side sealing gasket is connected with the upper end surface of the membrane electrode;
the first flat section of the second anode plate is in parallel and opposite arrangement with the second flat section of the second cathode plate and is in conflict with the second flat section of the second cathode plate through an opposite surface, the second flat Duan Er of the second anode plate is in parallel and opposite arrangement with the second flat section of the second cathode plate and is in conflict with the second flat section of the second cathode plate through an opposite surface, the second upper convex section of the second anode plate is in parallel and opposite arrangement with the second lower convex section of the second cathode plate and forms a second water cavity for containing water, the second upper convex section of the second anode plate is in parallel and opposite arrangement with the second lower convex section of the second cathode plate and is formed into a second air cavity for containing air, the second lower convex section of the second anode plate is in parallel and opposite arrangement with the second upper convex section of the second cathode plate, the lower convex bottom end of the second lower convex section of the second anode plate is vertically higher than the second straight Duan Yi, the second straight Duan Er and the upper convex top end of the second upper convex section of the second cathode plate, and is vertically lower than the second straight Duan Yi and the second straight Duan Er, so that a second water side sealing accommodating space for accommodating a second water side sealing gasket which prevents the second water cavity from communicating with the second air cavity is formed between the second lower convex section of the second anode plate and the second upper convex section of the second cathode plate, the second water side sealing gasket is arranged in the second water side sealing accommodating space, the upper end face of the second water side sealing gasket is in contact with the second lower convex section of the second anode plate, and the lower end face of the second water side sealing gasket is connected with the second upper convex section of the second cathode plate;
The upper protruding top end of the plane of the first upper protruding section of the second anode plate and the upper protruding top end of the plane of the second upper protruding section of the second anode plate are arranged in parallel and opposite to the membrane electrode and are connected through opposite surfaces, the second upper protruding section of the second anode plate is connected between the first upper protruding section and the second upper protruding section of the second anode plate, the second upper protruding section of the second anode plate is in a lower protruding state relative to the first upper protruding section of the second anode plate, the lower protruding bottom end of the second lower protruding section is a plane, so that a second gas side seal accommodating space for accommodating blocking gas passing through the second gas side seal pad of the cavity is formed by the second lower protruding section of the second anode plate, the upper end face of the second gas side seal pad is connected with the lower end face of the membrane electrode, and the lower end face of the second gas side seal pad is connected with the second lower protruding section of the second anode plate.
2. The packaging structure of a single cell of a fuel cell according to claim 1, wherein a lower end face of the first water side gasket is bonded to the first upper convex section of the first cathode plate; the lower convex bottom end of the plane of the first lower convex section I of the first cathode plate and the lower convex bottom end of the plane of the second lower convex section II of the first cathode plate are arranged oppositely in parallel with the membrane electrode and are connected through opposite surfaces for bonding; the upper end face of the first air side sealing gasket is bonded with the first upper convex section of the first cathode plate, and the lower end face of the first air side sealing gasket is bonded with the upper end face of the membrane electrode;
The lower end surface of the second water side sealing gasket is connected with the second upper convex section of the second cathode plate in a bonding way; the upper convex top end of the plane of the first upper convex section of the second anode plate and the upper convex top end of the plane of the second upper convex section of the second anode plate are arranged oppositely in parallel with the membrane electrode and are connected through opposite surfaces to be bonded; the upper end face of the second air side sealing gasket is bonded with the lower end face of the membrane electrode, and the lower end face of the second air side sealing gasket is bonded with the second lower convex section of the second anode plate.
3. The packaging structure of a single cell of a fuel cell according to claim 1, wherein a length of the first water side gasket in a horizontal direction exceeds the first lower convex section of the first anode plate and the first upper convex section of the first cathode plate, and both ends of the first water side gasket in a horizontal direction are respectively accommodated in the first water chamber and the first air chamber, and a length of the first water side gasket in a horizontal direction does not exceed half of a length of the first water chamber and the first air chamber in a horizontal direction.
4. The packaging structure of a single cell of a fuel cell according to claim 1, wherein a length of the second water side gasket in a horizontal direction exceeds the second lower convex section of the second anode plate and the second upper convex section of the second cathode plate, and both ends of the second water side gasket are respectively accommodated in the second water chamber and the second air chamber, and both ends of the second water side gasket are accommodated in portions of the second water chamber and the second air chamber, and a length of the second water side gasket in a horizontal direction does not exceed half of a length of the second water chamber and the second air chamber in a horizontal direction.
5. The packaging structure of a single cell of a fuel cell according to claim 1, wherein the first air-side gasket has a horizontal length substantially equal to or smaller than a horizontal length of an upper convex top end of the first upper convex section of the first cathode plate, and the second air-side gasket has a horizontal length substantially equal to or smaller than a horizontal length of a lower convex bottom end of the second lower convex section of the second anode plate.
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Citations (5)
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| CN108172843A (en) * | 2017-12-29 | 2018-06-15 | 上海神力科技有限公司 | A kind of bipolar panel assembly of fuel cell pile |
| CN110556551A (en) * | 2019-09-20 | 2019-12-10 | 上海治臻新能源装备有限公司 | Stepped sealing structure of metal polar plate of fuel cell |
| CN110571447A (en) * | 2019-09-20 | 2019-12-13 | 上海治臻新能源装备有限公司 | Fuel cell integrated metal bipolar plate assembly structure |
| CN111755713A (en) * | 2019-03-29 | 2020-10-09 | 北京中氢绿能科技有限公司 | Convex ridge type fuel cell bipolar plate sealing structure |
| CN112310433A (en) * | 2020-11-27 | 2021-02-02 | 航天氢能(上海)科技有限公司 | Sealing structure of fuel cell and assembly method of fuel cell stack |
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- 2023-07-28 CN CN202310937149.1A patent/CN117039038B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172843A (en) * | 2017-12-29 | 2018-06-15 | 上海神力科技有限公司 | A kind of bipolar panel assembly of fuel cell pile |
| CN111755713A (en) * | 2019-03-29 | 2020-10-09 | 北京中氢绿能科技有限公司 | Convex ridge type fuel cell bipolar plate sealing structure |
| CN110556551A (en) * | 2019-09-20 | 2019-12-10 | 上海治臻新能源装备有限公司 | Stepped sealing structure of metal polar plate of fuel cell |
| CN110571447A (en) * | 2019-09-20 | 2019-12-13 | 上海治臻新能源装备有限公司 | Fuel cell integrated metal bipolar plate assembly structure |
| CN112310433A (en) * | 2020-11-27 | 2021-02-02 | 航天氢能(上海)科技有限公司 | Sealing structure of fuel cell and assembly method of fuel cell stack |
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