CN220796818U - Membrane electrode assembly - Google Patents
Membrane electrode assembly Download PDFInfo
- Publication number
- CN220796818U CN220796818U CN202322199461.3U CN202322199461U CN220796818U CN 220796818 U CN220796818 U CN 220796818U CN 202322199461 U CN202322199461 U CN 202322199461U CN 220796818 U CN220796818 U CN 220796818U
- Authority
- CN
- China
- Prior art keywords
- frame
- mouth
- membrane electrode
- inner edge
- gas diffusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000012528 membrane Substances 0.000 title claims abstract description 27
- 238000009792 diffusion process Methods 0.000 claims abstract description 26
- 239000002390 adhesive tape Substances 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 25
- 239000003054 catalyst Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 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
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000004044 response Effects 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
Landscapes
- Fuel Cell (AREA)
Abstract
The utility model discloses a membrane electrode assembly, comprising: a CCM having a front face and a back face; the lower layer frame, the middle part of the lower layer frame forms the first frame mouth, the inner edge of the lower layer frame is adhered to the outer edge of the back of CCM; the upper layer frame, the middle part of the upper layer frame forms the second frame mouth, the size of the second frame mouth is smaller than the size of the first frame mouth, the inner edge of the upper layer frame is adhered to the front surface of the CCM through the double faced adhesive tape, the second frame mouth and the first frame mouth are coaxially arranged, the double faced adhesive tape is provided with a circle of closed rubber ring along the circumferential direction of the second frame mouth, the outer edge of the closed rubber ring extends to the upper side of the inner edge of the lower layer frame, and the inner edge of the closed rubber ring extends to the inner side of the second frame mouth; the gas diffusion layer is embedded in the first frame opening and the second frame opening respectively, the gas diffusion layer is attached to the CCM, and the outer edge of the gas diffusion layer in the second frame opening is adhered to the inner edge of the closed rubber ring. The utility model solves the problems of complex sealing structure and difficult mass production of the existing membrane electrode.
Description
Technical Field
The utility model relates to the technical field of fuel cells, in particular to a membrane electrode assembly.
Background
A fuel cell is a power generation device that directly converts chemical energy present in fuel and oxidant into electrical energy. The fuel cell has the advantages of zero emission, no vibration noise, good load response, high reliability and the like. How to improve the durability of the fuel cell is the focus of research, and the sealing structure of the membrane electrode is the focus of improvement.
The membrane electrode sealing structure in the prior art is various, such as chinese patent CN106941182a, which adopts a gasket layer, a protective layer and a sealing layer to improve the sealing effect of the fuel cell. The drawbacks of this approach are: the sealing structure is complex, the process is complex, and the quantitative production is difficult to realize.
Disclosure of Invention
In order to overcome the defects existing in the prior art, a membrane electrode assembly is provided at present to solve the problems that the sealing structure of the existing membrane electrode is complex and the mass production is difficult.
To achieve the above object, there is provided a membrane electrode assembly comprising:
a fuel cell chip having a front side and a back side;
the fuel cell device comprises a lower frame, wherein a first frame opening is formed in the middle of the lower frame, and the inner edge of the lower frame is adhered to the outer edge of the back of the fuel cell chip;
the upper frame, the middle part of upper frame is formed with the second frame mouth, the size of second frame mouth is less than the size of first frame mouth, the inner edge of upper frame passes through the double faced adhesive tape and bonds in the front of fuel cell chip, the second frame mouth with first frame mouth coaxial setting, the double faced adhesive tape sets up the round along the circumference direction of second frame mouth and forms the closed rubber ring, the outer fringe of closed rubber ring stretches to the top of the inner edge of lower floor frame, the inner edge of closed rubber ring stretches to in the second frame mouth;
the gas diffusion layers are embedded in the first frame opening and the second frame opening respectively, the gas diffusion layers are attached to the fuel cell chip, and the outer edges of the gas diffusion layers in the second frame opening are adhered to the inner edges of the closed rubber rings.
Further, the thickness of the double-sided adhesive tape is 5-60 mu m.
Further, the thickness of the double-sided adhesive tape is 5-20 mu m.
Further, the thickness of the upper frame is 10-70 μm.
Further, the thickness of the upper frame is 20-50 μm.
The utility model has the beneficial effects that the size of the upper gas diffusion layer is different from that of the lower gas diffusion layer, and the size of the second frame opening formed by the upper frame is consistent with that of the upper gas diffusion layer, so that the upper gas diffusion layer can be well fixed to prevent the transverse movement sealing failure. The dislocation structure formed by the upper frame, the double-sided adhesive tape and the lower frame can well decompose stress, and the sealing effect of the membrane electrode is ensured. On the other hand, the glue dispensing step of the gas diffusion layer at one side is saved, the production efficiency is improved, the cost is reduced, and the large-scale production is facilitated.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
fig. 1 is a schematic structural view of a membrane electrode assembly according to an embodiment of the present utility model.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, the present utility model provides a membrane electrode assembly comprising: the fuel cell chip 1, a lower frame 2, an upper frame 3, a closing rubber ring 4 and a gas diffusion layer 5.
The fuel cell chip 1 is a catalyst/proton exchange membrane assembly prepared by coating fuel cell catalyst on both sides of a proton exchange membrane, which is abbreviated as CCM (catalyst coated membrane).
In this embodiment, the fuel cell chip has opposite front and back sides.
A first frame opening is formed in the middle of the lower frame 2. The inner edge of the lower frame is adhered to the outer edge of the back surface of the fuel cell chip.
A second frame opening is formed in the middle of the upper frame 3. The second bezel has a size smaller than the first bezel.
The inner edge of the upper frame is adhered to the front surface of the fuel cell chip through a double-sided adhesive tape. The second frame opening is coaxially arranged with the first frame opening. The double-sided adhesive tape is provided with a circle of closed rubber ring 4 along the circumferential direction of the second frame opening. The closed rubber ring is closed. The outer edge of the closing rubber ring 4 extends to the upper part of the inner edge of the lower frame. The inner edge of the closing rubber ring 4 extends into the second frame opening.
The first frame opening and the second frame opening are respectively embedded with a gas diffusion layer 5. The gas diffusion layer is attached to the fuel cell chip. The outer edge of the gas diffusion layer in the second frame opening is adhered to the inner edge of the closed rubber ring.
According to the membrane electrode assembly, the size of the upper gas diffusion layer is different from that of the lower gas diffusion layer, and the size of the second frame opening formed by the upper frame is consistent with that of the upper gas diffusion layer, so that the upper gas diffusion layer can be well fixed, and the transverse movement sealing failure can be prevented. The dislocation structure formed by the upper frame, the double-sided adhesive tape and the lower frame can well decompose stress, and the sealing effect of the membrane electrode is ensured. On the other hand, the glue dispensing step of the gas diffusion layer at one side is saved, the production efficiency is improved, the cost is reduced, and the large-scale production is facilitated.
The membrane electrode assembly comprises an upper gas diffusion layer, an upper frame (membrane), double-sided adhesive tape, a battery fuel chip, a lower frame (membrane) and a lower gas diffusion layer. The cell fuel chip further comprises a first catalyst layer, a proton exchange membrane and a second catalyst layer.
The thickness of the upper frame film is consistent with the thickness of the compressed upper gas diffusion layer, and the first catalyst layer and the upper frame film of the battery fuel chip are simultaneously bonded on two opposite sides of the double-sided adhesive tape.
The size of the first frame opening formed by the lower frame film (namely the inner diameter size of the lower frame) is larger than the size of the second frame opening of the upper frame, and the outer diameter size of the lower frame film is smaller than the outer diameter size of the closed rubber ring formed by the double-sided adhesive tape.
As a preferred embodiment, the double-sided adhesive tape has a thickness of 5 to 60 μm. In this embodiment, the thickness of the double-sided adhesive tape is 5 to 20. Mu.m.
As a preferred embodiment, the thickness of the upper frame is 10-70 μm. In this embodiment, the thickness of the upper frame is 20-50 μm.
The foregoing description is only of the preferred embodiments of the present application and is presented as a description of the principles of the technology being utilized. It will be appreciated by persons skilled in the art that the scope of the utility model referred to in this application is not limited to the specific combinations of features described above, but it is intended to cover other embodiments in which any combination of features described above or equivalents thereof is possible without departing from the spirit of the utility model. Such as the above-described features and technical features having similar functions (but not limited to) disclosed in the present application are replaced with each other.
Claims (5)
1. A membrane electrode assembly, comprising:
a fuel cell chip having a front side and a back side;
the fuel cell device comprises a lower frame, wherein a first frame opening is formed in the middle of the lower frame, and the inner edge of the lower frame is adhered to the outer edge of the back of the fuel cell chip;
the upper frame, the middle part of upper frame is formed with the second frame mouth, the size of second frame mouth is less than the size of first frame mouth, the inner edge of upper frame passes through the double faced adhesive tape and bonds in the front of fuel cell chip, the second frame mouth with first frame mouth coaxial setting, the double faced adhesive tape sets up the round along the circumference direction of second frame mouth and forms the closed rubber ring, the outer fringe of closed rubber ring stretches to the top of the inner edge of lower floor frame, the inner edge of closed rubber ring stretches to in the second frame mouth;
the gas diffusion layers are embedded in the first frame opening and the second frame opening respectively, the gas diffusion layers are attached to the fuel cell chip, and the outer edges of the gas diffusion layers in the second frame opening are adhered to the inner edges of the closed rubber rings.
2. The membrane electrode assembly according to claim 1, wherein the double-sided adhesive tape has a thickness of 5 to 60 μm.
3. The membrane electrode assembly according to claim 2, wherein the double-sided adhesive tape has a thickness of 5 to 20 μm.
4. The membrane electrode assembly of claim 1, wherein the upper frame has a thickness of 10 to 70 μm.
5. The membrane electrode assembly of claim 4, wherein the upper frame has a thickness of 20 to 50 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322199461.3U CN220796818U (en) | 2023-08-15 | 2023-08-15 | Membrane electrode assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322199461.3U CN220796818U (en) | 2023-08-15 | 2023-08-15 | Membrane electrode assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220796818U true CN220796818U (en) | 2024-04-16 |
Family
ID=90635164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322199461.3U Active CN220796818U (en) | 2023-08-15 | 2023-08-15 | Membrane electrode assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220796818U (en) |
-
2023
- 2023-08-15 CN CN202322199461.3U patent/CN220796818U/en active Active
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| GR01 | Patent grant |