CN212625674U - Integrated fuel cell single cell and fuel cell stack - Google Patents
Integrated fuel cell single cell and fuel cell stack Download PDFInfo
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- CN212625674U CN212625674U CN202020445153.8U CN202020445153U CN212625674U CN 212625674 U CN212625674 U CN 212625674U CN 202020445153 U CN202020445153 U CN 202020445153U CN 212625674 U CN212625674 U CN 212625674U
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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 relates to an integration fuel cell monocell and fuel cell stack, the stack is piled up the assembly by a plurality of monocells and forms, and the monocell is including negative plate, proton exchange membrane, anode plate and the water board that piles up in proper order, and the positive and negative two sides of proton exchange membrane are located the flow field position department stromatolite of negative plate and anode plate and are equipped with catalysis layer and gas diffusion layer, and the monocell still includes the membrane electrode support body, and proton exchange membrane week side is fixed the membrane electrode support body in and form a complete plane with the membrane electrode support body, the membrane electrode support body and proton exchange membrane, catalysis layer and gas diffusion layer press from both sides as a whole between negative plate and anode plate, through. Compared with the prior art, the utility model has the advantages of stable in structure, sealing performance are excellent, the durability is good, the generating performance is high.
Description
Technical Field
The utility model belongs to the technical field of the fuel cell technique and specifically relates to a integration fuel cell monocell and fuel cell stack is related to.
Background
A conventional pem fuel cell is constructed as a single cell by stacking two bipolar plates and a Membrane Electrode Assembly (MEA) with a gasket interposed therebetween. Specifically, as shown in fig. 1 and fig. 2, the fuel cell unit includes a cathode plate 1, a proton exchange membrane 2, an anode plate 4 and a water plate 6 stacked in sequence, a catalyst layer 7 and a gas diffusion layer 8 are disposed on the flow channel positions on the bipolar plate on the front and back sides of the proton exchange membrane 2, a plate seal ring 3 is embedded between the contact surfaces of the cathode plate 1 and the anode plate 4 and the proton exchange membrane 2, and a water plate seal ring 5 is embedded between the anode plate 4 and the water plate 6, thereby realizing the sealed assembly of the cell unit. The traditional battery unit adopts a sealing piece (a sealing ring) to seal a cathode plate and an anode plate, and has the following problems: due to manufacturing errors of the single sealing element, size difference of the thickness of each battery unit is easily caused, uneven stress is caused between surfaces, and then difference of contact resistance between different battery units is caused, performance consistency among sections is difficult to guarantee when a galvanic pile generates electricity, and the performance of the galvanic pile cannot meet design requirements. Meanwhile, the contact area between the sealing element and the edge of the membrane electrode assembly is small, so that stress concentration is inevitable, and the membrane electrode or the bipolar plate and other assemblies can be damaged.
Therefore, a stable sealing structure for proton exchange membrane fuel cells is needed, which can uniformly stress the electrode plates, reduce the size difference of the thickness of each cell unit, and eliminate the contact resistance difference between the sheets so as to ensure the performance consistency of the single cells.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing an integrated fuel cell and fuel cell stack.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides an integration fuel cell monocell, is including the negative plate, proton exchange membrane, anode plate and the water board that pile gradually, the positive and negative two sides of proton exchange membrane be located the flow field position of negative plate and anode plate and to superpose and be equipped with catalysis layer and gas diffusion layer, the monocell still include the membrane electrode supporter, proton exchange membrane week side fix the membrane electrode supporter in and form a complete plane with the membrane electrode supporter, the membrane electrode supporter press from both sides between negative plate and anode plate as a whole with proton exchange membrane, catalysis layer and gas diffusion layer, negative plate and anode plate between through the sealed glue sealing connection who pours into.
And a circle of polar plate grooves used for filling sealant is arranged on the periphery of the flow field on the surface where the negative plate and the positive plate are buckled with each other.
The one side of the mutual lock of negative plate and anode plate be located flow field week side still symmetry and a plurality of polar plate bosss that are used for the location of evenly distributed, the membrane electrode supporter on correspond be equipped with the mounting groove that the polar plate boss matches, during the assembly, negative plate and anode plate on polar plate boss one-to-one contact, the membrane electrode supporter install the polar plate boss on.
The membrane electrode support body comprises two supporting frame bodies provided with square holes, the two supporting frame bodies are arranged in a laminated mode, the periphery side of the proton exchange membrane is clamped between the upper supporting frame body and the lower supporting frame body, and the proton exchange membrane is integrally bonded with the frames of the two supporting frame bodies.
The outer surface of the gas diffusion layer on the proton exchange membrane protrudes out of the membrane electrode supporting body and is respectively abutted against the flow fields on the cathode plate and the anode plate, filling gaps are formed between the side edge of the gas diffusion layer and the membrane electrode supporting body as well as between the cathode plate and the anode plate, and after sealant is injected between the cathode plate and the anode plate, the sealant permeates into the filling gaps.
The membrane electrode support body is a support frame body which is made of a polymer film and provided with square holes.
And when sealant is injected between the cathode plate and the anode plate, the flow channel in the flow field is vacuumized through the air inlet and outlet.
The sealant is fluid sealant, and is injected from the gap between the side surfaces of the cathode plate and the anode plate and is solidified and molded in the cathode plate and the anode plate.
The sealant is any one of silicon rubber, fluorosilicone, EPDM, chloroprene rubber, epoxy resin, polyurethane and polyisobutylene resin.
A fuel cell stack includes a plurality of integrated fuel cells, which are assembled in a stack.
Compared with the prior art, the utility model has the advantages of as follows:
(1) the utility model discloses the integrated structure that forms through sealed glue sealing connection's mode between the negative plate of fuel cell monocell and the anode plate, its stable in structure, sealing performance are excellent, the durability is good, compare in traditional sealing washer sealing mode, do not have the problem of sealing member compression, also do not have fuel cell monocell thickness size difference problem, the free generating performance of fuel cell improves;
(2) the membrane electrode supporting body of the utility model can be uniformly coated around the proton exchange membrane to play a role in protection, so that the stress on the membrane electrode assembly can be uniformly distributed even under the working condition of large temperature difference, thereby avoiding the stress concentration and reducing the possibility that the proton exchange membrane is damaged by mechanical stress;
(3) the utility model discloses form between gas diffusion layer lateral margin and membrane electrode support body, negative plate and the anode plate and fill the clearance, after pouring into sealed glue, sealed glue fills up this and fills up the clearance, has improved sealed effect, and structural stability is high;
(4) the polar plate groove of the utility model ensures the effective filling of the sealant, thereby ensuring the sealing effect;
(5) the utility model discloses the polar plate boss is used for supporting the membrane electrode supporter on the one hand, and on the other hand can form the location between the bipolar plate, guarantees to fill the homogeneity of sealed glue on the other hand, makes the uniformity of the distance between arbitrary position polar plate and the membrane electrode assembly on a fuel cell monomer, avoids the stress inequality between the face, improves the performance;
(6) the utility model discloses each fuel cell monocell has eliminated the size difference on the thickness in the fuel cell stack, eliminates the contact resistance difference between piece and the piece, has guaranteed single cell's performance uniformity, and the power generation performance of fuel cell stack effectively improves.
Drawings
Fig. 1 is a schematic structural view of a conventional fuel cell unit cell;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is an exploded view of the integrated fuel cell of the present invention;
fig. 4 is a schematic cross-sectional view of an integrated fuel cell of the present invention;
FIG. 5 is an enlarged view of portion B of FIG. 4;
fig. 6 is a schematic structural view of an anode plate of the present invention;
FIG. 7 is a schematic structural view of the cathode plate of the present invention;
FIG. 8 is a schematic view of the present invention during the injection of sealant;
FIG. 9 is a sectional view taken along the plane A-A in FIG. 8;
FIG. 10 is an enlarged view of portion C of FIG. 9;
fig. 11 is a schematic view of an assembly mold frame of the integrated fuel cell of the present invention.
In the figure, 1 is a cathode plate, 2 is a proton exchange membrane, 3 is a polar plate sealing ring, 4 is an anode plate, 5 is a water plate sealing ring, 6 is a water plate, 7 is a catalyst layer, 8 is a gas diffusion layer, 9 is a membrane electrode assembly, 10 is a sealant, 11 is a membrane electrode support body, 12 is a filling gap, 13 is an air inlet and outlet, 14 is a mold frame body, and 15 is an adhesive injection port.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the following description of the embodiments is merely an example of the nature, and the present invention is not intended to limit the application or the use thereof, and the present invention is not limited to the following embodiments.
Examples
As shown in fig. 3 to 5, an integrated fuel cell unit cell includes a cathode plate 1, a membrane electrode assembly 9, an anode plate 4, and a water plate 6, which are stacked in this order. The anode plate 4 forms a fuel channel, the cathode plate 1 forms an air channel, a flow field is formed between the anode plate 4 and the cathode plate 1, the membrane electrode assembly 9 is used for generating a carrier of electrochemical reaction to generate electric energy, and the water plate 6 is used for forming a heat-dissipating water channel. The membrane electrode assembly 9 comprises a proton exchange membrane 2, the front side and the back side of the proton exchange membrane 2 are positioned at the flow field positions of a cathode plate 1 and an anode plate 4 and are laminated with a catalyst layer 7 and a gas diffusion layer 8, the monocell further comprises a membrane electrode support body 11, the periphery side of the proton exchange membrane 2 is fixed in the membrane electrode support body 11 and forms a complete plane with the membrane electrode support body 11, the proton exchange membrane 2, the catalyst layer 7 and the gas diffusion layer 8 are integrally clamped between the cathode plate 1 and the anode plate 4, the cathode plate 1 and the anode plate 4 are in sealing connection through injected sealant 10, and the water plate 6 and the.
As shown in fig. 6 and 7, a circle of plate grooves for filling sealant 10 is provided on the side of the cathode plate 1 and the anode plate 4 that are fastened to each other, specifically, in fig. 6 and 7, the central regions of the anode plate 4 and the cathode plate 1 are an anode flow channel and a cathode flow channel, respectively, and the oblique line portions on the peripheral sides of the anode plate 4 and the cathode plate 1 are plate groove regions for injecting the sealant 10. The mutual buckled one side of negative plate 1 and anode plate 4 is located flow field week side and still symmetry and evenly distributed a plurality of polar plate bosss that are used for the location, corresponds on the membrane electrode supporter 11 to be equipped with the mounting groove that matches with the polar plate boss, and during the assembly, the polar plate boss one-to-one contact on negative plate 1 and the anode plate 4, the membrane electrode supporter 11 is installed on the polar plate boss. The cathode plate 1 and the anode plate 4 are respectively provided with 12 pole plate bosses in the embodiment, reference numerals a to L in fig. 6 and 7 are 12 pole plate bosses, reference numeral M, N is an assembly positioning hole of the anode plate 4 and the cathode plate 1, and the pole plate bosses in the embodiment are arranged in a pole plate groove area. The utility model discloses polar plate boss is used for supporting membrane electrode supporter 11 on the one hand, and on the other hand can form the location between the bipolar plate, guarantees to fill sealed 10 homogeneity of gluing for the distance between arbitrary position polar plate and the membrane electrode assembly 9 keeps unanimous on the fuel cell monomer, avoids the atress inequality between the face, improves the performance.
As shown in fig. 5, the membrane electrode support 11 includes two support frames with square holes, the two support frames are stacked, the periphery of the proton exchange membrane 2 is sandwiched between the upper and lower support frames, the membrane electrode support body 11 is a support frame body which is made of polymer films and is provided with square holes, the square holes are dug between two layers of polymer films with the thickness of 0.1mm to form the membrane electrode support body 11, the outer surface of a gas diffusion layer 8 on a proton exchange membrane 2 protrudes out of the membrane electrode support body 11 and is abutted against flow fields on a cathode plate 1 and an anode plate 4 respectively, a filling gap 12 is formed between the side edge of the gas diffusion layer 8 and the membrane electrode support body 11 as well as between the cathode plate 1 and the anode plate 4, and after a sealant 10 is injected between the cathode plate 1 and the anode plate 4, the sealant 10 permeates into the filling gap 12. The membrane electrode support body 11 is uniformly coated around the proton exchange membrane 2 to play a role in protection, so that even under the working condition of large temperature difference, the stress on the membrane electrode assembly 9 can be uniformly distributed, the stress concentration is avoided, and the possibility that the proton exchange membrane 2 is damaged by mechanical stress is reduced.
As shown in fig. 8 to 10, the air inlet and outlet 13 of the flow field on the cathode plate 1 and the anode plate 4 are arranged on several of the electrode plate bosses, when the sealant 10 is injected between the cathode plate 1 and the anode plate 4, the sealant 10 is injected from the gap between the side surfaces of the cathode plate 1 and the anode plate 4, and in fig. 8 to 10, the direction Z is the glue injection direction. The sealant 10 flows into the polar plate grooves of the anode plate 4 and the cathode plate 1, the flow channel in the flow field is vacuumized through the air inlet and outlet 13 while the sealant 10 is injected, a certain vacuum degree is formed in the flow channel of the cathode plate 1 and the anode plate 4, and the sealant 10 can infiltrate into the filling gap 12 at the edge of the gas diffusion layer 8 under the action of pressure. The utility model discloses sealed glue 10 is sealed glue 10 for the fluid, including silicon rubber, fluorosilicone, EPDM, chloroprene rubber, epoxy, polyurethane, polyisobutylene resin etc. sealed glue 10 pours into and solidifies the shaping in negative plate 1 and positive plate 4 from negative plate 1 and positive plate 4 side clearance.
In order to realize the utility model discloses the assembly of integration fuel cell monocell, the utility model discloses still designed like the assembly die frame shown in fig. 11 to the structure of integration fuel cell monocell, wherein, mould framework 14 compresses tightly negative plate 1, membrane electrode assembly 9 and the three part of anode plate 4, plays locate function, and injecting glue mouth 15 is arranged in injecting into sealed glue 10 in the clearance to anode plate 4 and negative plate 1.
The assembled integrated fuel battery monocells are stacked and assembled together to form a fuel battery stack, size difference in thickness of each fuel battery monocell of the fuel battery stack is eliminated, and contact resistance difference between the single cells is eliminated, so that performance consistency of the single cells is guaranteed, and performance of the fuel battery stack is improved.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (10)
1. An integrated fuel cell single cell comprises a cathode plate (1), a proton exchange membrane (2), an anode plate (4) and a water plate (6) which are stacked in sequence, the front and back surfaces of the proton exchange membrane (2) are positioned at the flow field positions of the cathode plate (1) and the anode plate (4) and are laminated with a catalyst layer (7) and a gas diffusion layer (8), characterized in that the single cell also comprises a membrane electrode support body (11), the peripheral side of the proton exchange membrane (2) is fixed in the membrane electrode support body (11) and forms a complete plane with the membrane electrode support body (11), the membrane electrode supporting body (11), the proton exchange membrane (2), the catalytic layer (7) and the gas diffusion layer (8) are clamped between the cathode plate (1) and the anode plate (4) as a whole, the cathode plate (1) and the anode plate (4) are connected in a sealing mode through injected sealing glue (10).
2. The integrated fuel cell single cell as claimed in claim 1, wherein a ring of plate grooves for filling the sealant (10) is formed on the periphery of the flow field on the surface of the cathode plate (1) and the anode plate (4) which are buckled with each other.
3. An integrated fuel cell single cell as claimed in claim 1, wherein the surfaces of the cathode plate (1) and the anode plate (4) that are fastened to each other are located on the periphery of the flow field, and a plurality of polar plate bosses for positioning are symmetrically and uniformly distributed, and the membrane electrode support body (11) is correspondingly provided with mounting grooves matched with the polar plate bosses, so that the polar plate bosses on the cathode plate (1) and the anode plate (4) are in one-to-one contact during assembly, and the membrane electrode support body (11) is mounted on the polar plate bosses.
4. An integrated fuel cell unit as claimed in claim 1, wherein the membrane electrode support (11) comprises two support frames provided with square holes, the two support frames are stacked, and the periphery of the proton exchange membrane (2) is sandwiched between the upper and lower support frames and integrally bonded to the frames of the two support frames.
5. An integrated fuel cell unit cell as claimed in claim 1, wherein the outer surface of the gas diffusion layer (8) on the proton exchange membrane (2) protrudes outward from the membrane electrode support body (11) and is abutted against the flow fields on the cathode plate (1) and the anode plate (4), respectively, a filling gap (12) is formed between the side edge of the gas diffusion layer (8) and the membrane electrode support body (11), the cathode plate (1) and the anode plate (4), and after the sealant (10) is injected between the cathode plate (1) and the anode plate (4), the sealant (10) permeates into the filling gap (12).
6. An integrated fuel cell unit as claimed in claim 4, characterised in that the membrane electrode support (11) is a square-holed support frame made of polymer film.
7. An integrated fuel cell unit as claimed in claim 3, characterised in that the inlet and outlet ports (13) of the flow fields of the cathode plate (1) and the anode plate (4) are arranged on several of the plate bosses, and when sealant (10) is injected between the cathode plate (1) and the anode plate (4), the flow channels in the flow fields are evacuated by the inlet and outlet ports (13).
8. An integrated fuel cell unit as claimed in claim 1, wherein the sealant (10) is a fluid sealant (10), and the sealant (10) is injected from the side gaps of the cathode plate (1) and the anode plate (4) and is solidified and formed in the cathode plate (1) and the anode plate (4).
9. The integrated fuel cell unit according to claim 8, wherein the sealant (10) is any one of silicone rubber, fluorosilicone rubber, EPDM, neoprene, epoxy, polyurethane, and polyisobutylene resin.
10. A fuel cell stack comprising a plurality of integrated fuel cells according to any one of claims 1 to 9, said fuel cells being assembled in a stack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020445153.8U CN212625674U (en) | 2020-03-31 | 2020-03-31 | Integrated fuel cell single cell and fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020445153.8U CN212625674U (en) | 2020-03-31 | 2020-03-31 | Integrated fuel cell single cell and fuel cell stack |
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| CN212625674U true CN212625674U (en) | 2021-02-26 |
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| CN202020445153.8U Active CN212625674U (en) | 2020-03-31 | 2020-03-31 | Integrated fuel cell single cell and fuel cell stack |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883797A (en) * | 2020-03-31 | 2020-11-03 | 同济大学 | Integrated fuel cell single cell and fuel cell stack |
| CN114023991A (en) * | 2021-11-02 | 2022-02-08 | 浙江高成绿能科技有限公司 | Assembling structure of fuel cell stack |
| CN114784313A (en) * | 2022-03-25 | 2022-07-22 | 上海治臻新能源股份有限公司 | Supporting structure for improving deformation of membrane electrode frame of gas cavity of fuel cell |
-
2020
- 2020-03-31 CN CN202020445153.8U patent/CN212625674U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883797A (en) * | 2020-03-31 | 2020-11-03 | 同济大学 | Integrated fuel cell single cell and fuel cell stack |
| CN114023991A (en) * | 2021-11-02 | 2022-02-08 | 浙江高成绿能科技有限公司 | Assembling structure of fuel cell stack |
| CN114023991B (en) * | 2021-11-02 | 2023-08-18 | 浙江高成绿能科技有限公司 | Assembling structure of fuel cell pile |
| CN114784313A (en) * | 2022-03-25 | 2022-07-22 | 上海治臻新能源股份有限公司 | Supporting structure for improving deformation of membrane electrode frame of gas cavity of fuel cell |
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