CN213520049U - Fuel cell stack easy to disassemble and assemble - Google Patents
Fuel cell stack easy to disassemble and assemble Download PDFInfo
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- CN213520049U CN213520049U CN202023106004.8U CN202023106004U CN213520049U CN 213520049 U CN213520049 U CN 213520049U CN 202023106004 U CN202023106004 U CN 202023106004U CN 213520049 U CN213520049 U CN 213520049U
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- membrane electrode
- carbon paper
- release agent
- fuel cell
- electrode body
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model discloses a fuel cell stack easy to be disassembled and assembled, which comprises a plurality of bipolar plates, wherein a membrane electrode matched with the bipolar plates is arranged between the adjacent bipolar plates; the membrane electrode comprises first membrane electrode carbon paper, second membrane electrode carbon paper and a membrane electrode body arranged between the first membrane electrode carbon paper and the second membrane electrode carbon paper; the edge of the bipolar plate is pasted with UV curing type sealant, the edge of the membrane electrode body is coated with a release agent, and the UV curing type sealant is abutted with the release agent; the edge is a planar area 3mm to 6mm from the boundary. This application is through the edge coating release agent in membrane electrode body both sides for when guaranteeing fuel cell pile leakproofness, make bipolar plate and membrane electrode easily separate, avoided the damage of polar plate and membrane electrode at the dismouting in-process, be favorable to the maintenance or the rework in polar plate and membrane electrode later stage.
Description
Technical Field
The utility model relates to a fuel cell technical field especially relates to a fuel cell pile of easy dismouting.
Background
A fuel cell is a chemical device that converts chemical energy into electrical energy by reacting fuel with oxygen, and is also called an electrochemical generator. The fuel cell stack is assembled by a plurality of bipolar plates and membrane electrodes, and the structure of the fuel cell stack is the bipolar plates, the membrane electrodes, the bipolar plates and the membrane electrodes … …. In order to ensure stable performance of the fuel cell stack, sealing treatment is usually required between the electrode plate and the membrane electrode.
At present, in a fuel cell stack, a sealing mode between a polar plate and a membrane electrode is generally sealed by adopting a mode of curing an assembly gasket, however, a UV curing type sealant has an oxygen inhibition phenomenon, the surface is sticky after curing, and the bonding force between the UV curing type sealant and a contact frame can be increased by long-time stack assembly pressure, so that the membrane electrode is tightly attached to the polar plate, the membrane electrode is difficult to detach, and the later maintenance or rework of the fuel cell stack is not facilitated.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a fuel cell pile of easy dismouting aims at solving UV solidification type sealant solidification rear surface and is tacky, leads to membrane electrode and polar plate closely to laminate, and difficult dismantlement is unfavorable for the problem of fuel cell pile later stage maintenance or doing over again.
In order to achieve the above object, the utility model provides a following technical scheme:
a fuel cell stack easy to disassemble and assemble comprises a plurality of bipolar plates, wherein membrane electrodes matched with the bipolar plates are arranged between the adjacent bipolar plates; the membrane electrode comprises first membrane electrode carbon paper, second membrane electrode carbon paper and a membrane electrode body arranged between the first membrane electrode carbon paper and the second membrane electrode carbon paper, the first membrane electrode carbon paper and the second membrane electrode carbon paper are equal in size, the area of the first membrane electrode carbon paper is smaller than that of the membrane electrode body, and the distance between the boundary of the first membrane electrode carbon paper and the boundary of the membrane electrode body is equal everywhere; the edge of the bipolar plate is pasted with UV curing type sealant, the edge of the membrane electrode body is coated with a release agent, and the UV curing type sealant is abutted with the release agent; the edge is a plane area which is 3 mm-6 mm away from the boundary, and the plane area formed by the boundary of the first membrane electrode carbon paper and the boundary of the membrane electrode body on the membrane electrode body and the plane area of the edge of the membrane electrode body are the same plane area.
Further, the area of the second membrane electrode carbon paper is smaller than that of the membrane electrode body, and the distance between the boundary of the second membrane electrode carbon paper and the boundary of the membrane electrode body is equal everywhere. That is, the first membrane electrode carbon paper and the second membrane electrode carbon paper are both centrally and symmetrically attached to the membrane electrode body, and because the area of the membrane electrode carbon paper is smaller than that of the membrane electrode body, the edges of the membrane electrode body are not attached by the membrane electrode carbon paper.
Furthermore, the edges of two side surfaces of the membrane electrode body are coated with release agents.
Further, the coating thickness of the release agent is 0.02mm-0.1 mm. When the thickness of the coated release agent is 0.02mm-0.1mm, the release agent can ensure that the release agent can play the best isolation effect on the premise of not influencing the sealing performance of a fuel cell stack, and the bonding degree of the UV curing type sealant to the membrane electrode body is effectively reduced.
Further, the release agent is cured by heating at 60-200 ℃.
Further, the release agent is a silicone oil release agent or a fluorine release agent. The release agent needs to be high-temperature resistant, moisture resistant, acid resistant and anti-aging, so that the sealing performance of the fuel cell stack is ensured, the bonding force of the UV curing sealant to the membrane electrode body can be reduced, and the later maintenance or rework of the fuel cell stack is facilitated.
Further, screen printing holes for coating the release agent are formed in two sides of the membrane electrode body.
Further, the screen printing holes are 50-300 meshes.
The utility model discloses an edge coating release agent in membrane electrode body both sides when guaranteeing fuel cell pile leakproofness, can reduce the sealed cohesive force to membrane electrode body of UV solidification type again for bipolar plate and membrane electrode easily separate, have avoided the damage of polar plate and membrane electrode at the dismouting in-process, are favorable to the maintenance or the doing over again in polar plate and membrane electrode later stage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of a transverse section structure of a fuel cell stack easy to disassemble and assemble according to an embodiment of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
At present, in a fuel cell stack, a sealing mode between a polar plate and a membrane electrode is generally sealed by adopting a mode of curing an assembly gasket, however, a UV curing type sealant has an oxygen inhibition phenomenon, the surface is sticky after curing, and the bonding force between the UV curing type sealant and a contact frame can be increased by long-time stack assembly pressure, so that the membrane electrode is tightly attached to the polar plate, the membrane electrode is difficult to detach, and the later maintenance or rework of the fuel cell stack is not facilitated. In order to solve the technical problem, the utility model provides a fuel cell galvanic pile of easy dismouting.
As shown in fig. 1, an easy-to-disassemble fuel cell stack provided in an embodiment of the present invention includes a plurality of bipolar plates 1, and a membrane electrode 2 adapted to the bipolar plates 1 is disposed between adjacent bipolar plates 1; the membrane electrode 2 comprises a first membrane electrode carbon paper 21, a second membrane electrode carbon paper 22 and a membrane electrode body 23 arranged between the first membrane electrode carbon paper 21 and the second membrane electrode carbon paper 22, the first membrane electrode carbon paper 21 and the second membrane electrode carbon paper 22 are equal in size, the area of the first membrane electrode carbon paper 21 is smaller than that of the membrane electrode body 23, and the distance between the boundary of the first membrane electrode carbon paper 21 and the boundary of the membrane electrode body 23 is equal everywhere; the edge of the bipolar plate 1 is pasted with a UV curing type sealant 3, the edge of the membrane electrode body 23 is coated with a release agent 4, and the UV curing type sealant 3 is abutted with the release agent 4; the edge is a plane area which is 3 mm-6 mm away from the boundary, and the plane area formed by the boundary of the first membrane electrode carbon paper 21 and the boundary of the membrane electrode body 23 on the membrane electrode body 23 and the plane area of the edge of the membrane electrode body 23 are the same plane area.
Further, the area of the second membrane electrode carbon paper 22 is smaller than that of the membrane electrode body 23, and the distance between the boundary of the second membrane electrode carbon paper 22 and the boundary of the membrane electrode body 23 is equal everywhere. That is, the first membrane electrode carbon paper 21 and the second membrane electrode carbon paper 22 are both centrally and symmetrically attached to the membrane electrode body 23, and since the area of the membrane electrode carbon paper is smaller than that of the membrane electrode body, the edges of the membrane electrode body are not attached by the membrane electrode carbon paper.
Further, in the present embodiment, the edges of both sides of the membrane electrode body 23 are coated with the release agent 4.
Further, the coating thickness of the release agent 4 is 0.02mm-0.1 mm. When the thickness of the coated release agent 4 is 0.02mm-0.1mm, the release agent can ensure that the best isolation effect can be achieved on the premise of not influencing the sealing performance of the fuel cell stack, and the bonding degree of the UV curing type sealant to the membrane electrode body is effectively reduced.
Further, the release agent 4 is a release agent which is cured by heating at 60-200 ℃.
Further, the release agent 4 is a silicone oil release agent or a fluorine release agent. The release agent needs to be high-temperature resistant, moisture resistant, acid resistant and anti-aging, so that the sealing performance of the fuel cell stack is ensured, the bonding force of the UV curing type sealant 3 to the membrane electrode body 23 can be reduced, and the later maintenance or rework of the fuel cell stack is facilitated.
Further, screen printing holes (not shown) for coating the release agent 4 are provided on both sides of the membrane electrode body 23.
Further, the screen printing holes are 50-300 meshes.
In the fuel cell stack easy to disassemble and assemble, in the assembling process, the release agent 4 is required to be uniformly coated on the edges of two sides of the membrane electrode body 23 (the edges are contact areas with the UV curing sealant), and the coating thickness is 0.02mm-0.1 mm; the coating process of the release agent 4 can use a silk-screen printing coating process, the mesh number of a silk-screen plate is 50-300 meshes, and the printing pressure is 2-8kgf/cm2The printing speed is 1-5m/min, and the oil return speed is 1-5 m/min. Then feeding the release agent 4 by using an external heat sourceCuring (curing temperature is 60-200 ℃); and finally, stacking the bipolar plate 1 and the membrane electrode 2 in sequence, and applying external force to deform the UV curing type sealant 3 arranged on the bipolar plate 1 to be tightly attached to the membrane electrode, wherein the bipolar plate 1 is fastened by using bolts to complete the sealing of the fuel cell stack.
In the disassembly process, the bolts between the bipolar plates 1 are disassembled, and the external force for maintaining the fastening of the fuel cell stack is eliminated; because the fuel cell stack is coated with the release agent on the membrane electrode 2 in advance, the bonding force of the UV curing type sealant 3 to the membrane electrode 2 is small, the bipolar plate 1 and the membrane electrode 2 are easily separated without damage, and the fuel cell stack is beneficial to later maintenance, rework or replacement of parts of the fuel cell stack.
The utility model discloses an edge coating release 4 in membrane electrode body 23 both sides when guaranteeing fuel cell pile leakproofness, can reduce the sealed 3 cohesive force to membrane electrode body 2 of glue of UV solidification type again for bipolar plate 1 easily separates with membrane electrode 2, has avoided the damage of polar plate and membrane electrode at the dismouting in-process, is favorable to the maintenance or the doing over again in polar plate and membrane electrode later stage.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (8)
1. A fuel cell stack easy to disassemble and assemble is characterized by comprising a plurality of bipolar plates, wherein membrane electrodes matched with the bipolar plates are arranged between the adjacent bipolar plates; the membrane electrode comprises first membrane electrode carbon paper, second membrane electrode carbon paper and a membrane electrode body arranged between the first membrane electrode carbon paper and the second membrane electrode carbon paper, the first membrane electrode carbon paper and the second membrane electrode carbon paper are equal in size, the area of the first membrane electrode carbon paper is smaller than that of the membrane electrode body, and the distance between the boundary of the first membrane electrode carbon paper and the boundary of the membrane electrode body is equal everywhere; the edge of the bipolar plate is pasted with UV curing type sealant, the edge of the membrane electrode body is coated with a release agent, and the UV curing type sealant is abutted with the release agent; the edge is a plane area which is 3 mm-6 mm away from the boundary, and the plane area formed by the boundary of the first membrane electrode carbon paper and the boundary of the membrane electrode body on the membrane electrode body and the plane area of the edge of the membrane electrode body are the same plane area.
2. The easily disassembled fuel cell stack as set forth in claim 1, wherein the area of the second membrane electrode carbon paper is smaller than the area of the membrane electrode body, and the boundary of the second membrane electrode carbon paper is equal everywhere in distance from the boundary of the membrane electrode body.
3. The easily disassembled and assembled fuel cell stack as set forth in claim 1, wherein the edges of both sides of the membrane electrode body are coated with a release agent.
4. The easily disassembled fuel cell stack according to claim 1, wherein the release agent is coated to a thickness of 0.02mm to 0.1 mm.
5. The easily disassembled fuel cell stack as set forth in claim 1, wherein the release agent is a release agent that is heat-cured at 60-200 ℃.
6. The easily disassembled fuel cell stack according to claim 1, wherein the release agent is a silicone oil release agent or a fluorine release agent.
7. The easily disassembled and assembled fuel cell stack as set forth in claim 1, wherein screen printing holes for coating the release agent are provided at both sides of the membrane electrode body.
8. The easily disassembled fuel cell stack as set forth in claim 7, wherein the screen printing holes are 50-300 mesh screen printing holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023106004.8U CN213520049U (en) | 2020-12-21 | 2020-12-21 | Fuel cell stack easy to disassemble and assemble |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023106004.8U CN213520049U (en) | 2020-12-21 | 2020-12-21 | Fuel cell stack easy to disassemble and assemble |
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| Publication Number | Publication Date |
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| CN213520049U true CN213520049U (en) | 2021-06-22 |
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| CN202023106004.8U Active CN213520049U (en) | 2020-12-21 | 2020-12-21 | Fuel cell stack easy to disassemble and assemble |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555568A (en) * | 2021-07-26 | 2021-10-26 | 中汽创智科技有限公司 | Membrane electrode and preparation method thereof |
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- 2020-12-21 CN CN202023106004.8U patent/CN213520049U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555568A (en) * | 2021-07-26 | 2021-10-26 | 中汽创智科技有限公司 | Membrane electrode and preparation method thereof |
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