CN117199419A - Fuel cell bipolar plate with superposition positioning structure - Google Patents
Fuel cell bipolar plate with superposition positioning structure Download PDFInfo
- Publication number
- CN117199419A CN117199419A CN202311242729.5A CN202311242729A CN117199419A CN 117199419 A CN117199419 A CN 117199419A CN 202311242729 A CN202311242729 A CN 202311242729A CN 117199419 A CN117199419 A CN 117199419A
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- China
- Prior art keywords
- bipolar plate
- plate body
- fuel cell
- bosses
- boss
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- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 31
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 239000012528 membrane Substances 0.000 claims description 23
- 239000011810 insulating material Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- 239000000376 reactant Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
Abstract
The invention relates to a fuel cell bipolar plate with a superposition positioning structure, which comprises a bipolar plate body, wherein a plurality of bosses are arranged on the edge of one side surface of the bipolar plate body, grooves are arranged on the other side surface of the bipolar plate body corresponding to the bosses, the sizes of the bosses are matched with those of the grooves, and two adjacent bipolar plates can be accurately positioned through the insertion connection of the bosses and the grooves. The bipolar plate with the stacked positioning structure of the fuel cell has the advantages of simple structure, easiness in processing, no need of a common internal positioning device or an external positioning device, and capability of realizing accurate positioning in the process of assembling a galvanic pile, thereby being beneficial to reducing the tooling cost of the galvanic pile and improving the assembly efficiency of the galvanic pile.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell bipolar plate with a superposition positioning structure.
Background
A fuel cell is a power generation device that directly and efficiently converts chemical energy in fuel and oxidant into electric energy through electrocatalytic reaction on a membrane electrode. Multiple fuel cell units are stacked and assembled together in a filter press manner to form a fuel cell stack (or "stack").
During assembly of a fuel cell stack, it is often necessary to use positioning devices to align the components of the Membrane Electrode Assemblies (MEA), seals, bipolar plates, and end plates within the stack without relative displacement to create a relatively smooth common channel for the flow and distribution of reactant gases or cooling medium. If the positioning device is not provided or the positioning is inaccurate, all parts are easy to misplace during the assembly of the electric pile, so that the sealing is not tight, the phenomenon of gas channeling and gas leakage occurs in the electric pile, the distribution of reaction gas and cooling medium in the electric pile is uneven, and the electric pile cannot work normally. Therefore, the positioning of the fuel cell stack during assembly plays a very critical role.
The current common positioning methods of the fuel cell stack mainly comprise two types: internal positioning and external positioning, such as the solutions disclosed in publication numbers CN 1787263a and CN1750303 a. The internal positioning is usually performed by using a whole positioning rod, the length of the rod is longer than that of the pile, and the internal positioning rod needs to be taken out after the pile is assembled. In addition, each single cell or other components in the fuel cell stack which is assembled successfully for the first time may not reach the design technical index, or the performance of certain components is attenuated or even fails after the stack is used for a period of time, and the whole fuel cell stack needs to be disassembled, the single cell or the components with the quality number are replaced, and the fuel cell stack is assembled again. The repeated assembly requires repeated insertion and removal of the inner positioning rod, thereby wasting precious time and energy, and the inner positioning rod is seriously worn due to repeated use, so that the accurate positioning in the next use is affected. The external positioning is realized by a device arranged outside the fuel cell, and when the electric pile is assembled, the end plate, the current collecting plate, the membrane electrode, the bipolar plate and other parts of the electric pile are clung to the external positioning device to realize alignment. The adoption of the external positioning structure requires the development of a special external positioning device, and is influenced by the plate shape of the fuel cell, the number of sections of the electric pile and the like, and different external positioning devices may need to be developed to meet different requirements.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a fuel cell bipolar plate with a superposition positioning structure, which can realize accurate positioning in the process of assembling a galvanic pile without a common internal positioning or external positioning device, is beneficial to reducing the tooling cost of the galvanic pile and improves the assembly efficiency of the galvanic pile.
The technical scheme adopted by the invention is as follows:
the invention provides a fuel cell bipolar plate with a superposition positioning structure, which comprises a bipolar plate body and is characterized in that: the bipolar plate comprises a bipolar plate body, wherein a plurality of bosses are arranged on the edge of one side surface of the bipolar plate body, grooves are formed in the corresponding positions of the other side surface and the bosses, the sizes of the bosses and the grooves are matched, and two adjacent bipolar plates can be accurately positioned through the insertion connection of the bosses and the grooves.
Further, the number of the boss and the groove is not less than two.
Further, the height of the boss and the depth of the groove are not more than 1/2 of the thickness of the bipolar plate.
Further, when the membrane electrode is assembled between the bipolar plate bodies, the depth of the groove is not more than after the thickness of the membrane electrode is subtracted from the height of the boss.
Further, when the bipolar plate body is assembled with the membrane electrode, corresponding openings are formed in the positions, corresponding to the bosses, of the edges of the membrane electrode, and the membrane electrode is directly sleeved outside the bosses through the openings, so that the membrane electrode is positioned.
Further, if the frame of the bipolar plate body is conductive, the boss is made of an insulating material, namely, when the bipolar plate body is prepared, the boss is perforated in advance at the corresponding position of the edge, and the boss is connected to the edge of the bipolar plate body in an adhesive or welding mode; if the frame of the bipolar plate body is made of insulating materials, the boss and the frame of the bipolar plate body are integrally processed.
Further, a limiting structure is arranged on the outer side of the boss root.
Compared with the prior art, the invention has the following beneficial effects:
the bipolar plate with the stacked positioning structure of the fuel cell has the advantages of simple structure, easiness in processing, no need of a common internal positioning device or an external positioning device, and capability of realizing accurate positioning in the process of assembling a galvanic pile, thereby being beneficial to reducing the tooling cost of the galvanic pile and improving the assembly efficiency of the galvanic pile.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram showing the effect of an assembled embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the effect of the second embodiment of the present invention after assembly.
Wherein, the reference numerals: 1-bipolar plate body I; 2-grooves; 3-bipolar plate body II; 4-a boss; 41-limiting structure; 5-membrane electrode.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
It should be noted that, in the description of the present invention, the terms "upper", "lower", "top", "bottom", "one side", "another side", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be configured and operated in a specific orientation.
Example 1
Referring to fig. 1 and 2, a specific structure of one embodiment of a fuel cell bipolar plate with a stacked positioning structure according to the present embodiment is shown. The bipolar plate comprises a bipolar plate body I1 and a bipolar plate body II3, wherein a plurality of bosses 4 are arranged on the edge of one side surface of the bipolar plate body II3, grooves 2 are formed in the position, corresponding to the bosses 4, of one side surface of the bipolar plate body I1, the sizes and the shapes of the bosses 4 and the grooves 2 are matched, and accurate positioning is achieved between the adjacent bipolar plate body I1 and the bipolar plate body II3 through inserting and embedding of the bosses 4 and the grooves 2; in this embodiment, the boss 4 and the groove 2 are both cylindrical structures.
The number of the bosses 4 and the grooves 2 is not less than two, and the bosses and the grooves are respectively and correspondingly distributed on the edges of the two side surfaces of the bipolar plate body; the height of the boss 4 is not more than 1/2 of the thickness of the bipolar plate body II3, and the depth of the groove 2 is not more than 1/2 of the thickness of the bipolar plate body I1. In this embodiment, the thicknesses of the bipolar plate body I1 and the bipolar plate body II3 are 1mm; the height of the boss 4 is 0.5mm; the depth of the groove 2 is 0.4mm; the thickness of the membrane electrode 5 was 0.1mm.
When the membrane electrode 5 is assembled between the bipolar plate body I1 and the bipolar plate body II3, the depth of the groove 2 is not more than the height of the boss 4 minus the thickness of the membrane electrode 5; and when the bipolar plate body I1 and the bipolar plate body II3 are assembled with the membrane electrode 5, the positions of the edges of the membrane electrode 5 corresponding to the boss 4 are perforated in advance, and the membrane electrode 5 is directly sleeved on the outer side of the boss 4 through the perforated holes, so that the positioning of the membrane electrode 5 is realized.
If the frames of the bipolar plate body I1 and the bipolar plate body II3 are conductive, the boss 4 is made of an insulating material, namely, when the bipolar plate body I1 and the bipolar plate body II3 are prepared, holes are formed in the corresponding positions of the edges in advance, and the boss 4 is connected to the edge of the bipolar plate body II3 in an adhesive or welding mode; if the frames of the bipolar plate body I1 and the bipolar plate body II3 are made of insulating materials, the boss 4 and the frame of the bipolar plate body II3 are integrally processed.
Example two
Compared with the first embodiment, the fuel cell bipolar plate with the stacked positioning structure provided by the embodiment is different in that: the root outside of boss 4 still is provided with limit structure 41, and limit structure 41 forms the ladder structure with boss 4, both can be used to the location of superposition in-process, also can be used to the spacing of pressure equipment process, prevents the excessive compression of electric pile to ensure fuel cell's performance.
The invention is not fully described in detail in the prior art.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the design of the present invention.
Claims (7)
1. A fuel cell bipolar plate with superimposed positioning structure, comprising a bipolar plate body, characterized in that: the bipolar plate comprises a bipolar plate body, wherein a plurality of bosses are arranged on the edge of one side surface of the bipolar plate body, grooves are formed in the corresponding positions of the other side surface and the bosses, the sizes of the bosses and the grooves are matched, and two adjacent bipolar plates can be accurately positioned through the insertion connection of the bosses and the grooves.
2. A fuel cell bipolar plate with stacked orientation structure according to claim 1, wherein: the number of the bosses and the grooves is not less than two.
3. A fuel cell bipolar plate with stacked orientation structure according to claim 1, wherein: the height of the boss and the depth of the groove are not more than 1/2 of the thickness of the bipolar plate.
4. A fuel cell bipolar plate with stacked orientation structure according to claim 1, wherein: when the membrane electrode is assembled between the bipolar plate bodies, the depth of the groove is not more than after the thickness of the membrane electrode is subtracted from the height of the boss.
5. A fuel cell bipolar plate with stacked orientation structure according to claim 1, wherein: when the bipolar plate body is assembled with the membrane electrode, corresponding openings are formed in the positions, corresponding to the bosses, of the edges of the membrane electrode, and the membrane electrode is directly sleeved outside the bosses through the openings, so that the membrane electrode is positioned.
6. A fuel cell bipolar plate with stacked orientation structure according to claim 1, wherein: if the frame of the bipolar plate body is conductive, the boss is made of an insulating material, namely, when the bipolar plate body is prepared, a hole is formed in the corresponding position of the edge in advance, and the boss is connected to the edge of the bipolar plate body in an adhesive or welding mode; if the frame of the bipolar plate body is made of insulating materials, the boss and the frame of the bipolar plate body are integrally processed.
7. A fuel cell bipolar plate with stacked orientation structure according to claim 1, wherein: and a limiting structure is arranged on the outer side of the boss root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311242729.5A CN117199419A (en) | 2023-09-25 | 2023-09-25 | Fuel cell bipolar plate with superposition positioning structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311242729.5A CN117199419A (en) | 2023-09-25 | 2023-09-25 | Fuel cell bipolar plate with superposition positioning structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117199419A true CN117199419A (en) | 2023-12-08 |
Family
ID=88986869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311242729.5A Pending CN117199419A (en) | 2023-09-25 | 2023-09-25 | Fuel cell bipolar plate with superposition positioning structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117199419A (en) |
-
2023
- 2023-09-25 CN CN202311242729.5A patent/CN117199419A/en active Pending
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