CN111384416A - Fuel cell bipolar plate sealing structure and sealing method - Google Patents
Fuel cell bipolar plate sealing structure and sealing method Download PDFInfo
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- CN111384416A CN111384416A CN202010217696.9A CN202010217696A CN111384416A CN 111384416 A CN111384416 A CN 111384416A CN 202010217696 A CN202010217696 A CN 202010217696A CN 111384416 A CN111384416 A CN 111384416A
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- sealing
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- fuel cell
- membrane electrode
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- 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
- H01M8/0276—Sealing means characterised by their form
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- 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
- H01M8/028—Sealing means characterised by their material
- H01M8/0284—Organic resins; Organic polymers
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- 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
- H01M8/0286—Processes for forming seals
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to a fuel cell bipolar plate sealing structure which is used for sealing an anode plate, a membrane electrode and a cathode plate, and comprises an insulating paint layer, an adhesive and a sealing element, wherein the insulating paint layer and the adhesive are sprayed on the anode plate or the cathode plate; the insulating paint layer is sprayed on the edge area of the polar plate, and the adhesive is coated on the polar plate reaction area; the membrane electrode is fixed on the polar plate through an adhesive, and the sealing element is positioned in the sealing groove of the polar plate. Compared with the prior art, the invention has the advantages of high volume power density of the galvanic pile, simpler assembly, low leakage risk and the like.
Description
Technical Field
The invention relates to the technical field of fuel cell sealing, in particular to a fuel cell bipolar plate sealing structure and a sealing method.
Background
The fuel cell is one of new energy batteries, has the advantages of low working temperature, large specific power, quick start and the like, and has become one of the hot spots of research in the field of new energy. The key components of a fuel cell are the membrane electrode MEA and the bipolar plates. The bipolar plate comprises a cathode plate and an anode plate of a flow field, the MEA comprises a reaction area and a supporting frame, the reaction area is placed between the cathode plate and the anode plate and provides platinum catalyst to support electrochemical reaction, and the frame plays a role in supporting the reaction area and isolating the cathode plate and the anode plate to prevent short circuit.
Since the fuel cell contains gaseous media hydrogen, air and cooling media ethylene glycol during operation, sealing is required between the MEA and the cathode and anode plates to prevent leakage of the media and leakage of the media. A common sealing method is to place an elastomeric seal on each side of the membrane electrode MEA and then apply a certain pressure to perform compression sealing. Chinese patent publication No. CN110571452A discloses a sealing gasket for a fuel cell, which adopts a sealing method that two sealing elements are respectively disposed at two sides of an MEA and then compressed, and this sealing method generally requires two sealing elements for sealing, and has a large thickness, which results in a high stack height, affects power density, and is inconvenient to assemble, and one of the sealing elements must be fixed by glue, otherwise, the sealing elements cannot be stacked and mounted, and cannot be mass-produced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a fuel cell stack sealing structure and a sealing method which have the advantages of high stack volume power density, simpler assembly and low leakage risk.
The purpose of the invention can be realized by the following technical scheme:
a fuel cell bipolar plate sealing structure is used for sealing among an anode plate, a membrane electrode and a cathode plate, and comprises an insulating paint layer, an adhesive and a sealing element; the insulating paint layer and the adhesive are sprayed on the anode plate or the cathode plate; the insulating paint layer is sprayed on the edge area of the polar plate; the adhesive is coated on the polar plate reaction area; the membrane electrode is fixed on the polar plate through an adhesive; the sealing element is positioned in the sealing groove of the polar plate.
Preferably, the insulating paint layer is acrylic acid three-proofing paint.
Preferably, the adhesive is an epoxy resin adhesive.
More preferably, the adhesive is coated on the anode plate in a dispensing or silk-screen manner.
Preferably, the sealing element is a silica gel sealing ring.
More preferably, the number of said seals is one.
More preferably, the seal is sealed by compression sealing.
Preferably, the membrane electrode is a frameless membrane electrode or a narrow frame membrane electrode; the frame length of the narrow-frame membrane electrode is 3-5 mm.
A sealing method for the fuel cell bipolar plate sealing structure, comprising the steps of:
step 1: selecting a polar plate needing to be sprayed with an insulating paint layer and an adhesive;
step 2: spraying an insulating paint layer on the edge area of the polar plate;
and step 3: gluing an adhesive in a polar plate reaction area in a dispensing or silk-screen printing mode, and then bonding the membrane electrode and the polar plate through the adhesive;
and 4, step 4: and installing the sealing element in the sealing groove of the polar plate for compression sealing.
Compared with the prior art, the invention has the following advantages:
firstly, the volume power density of the electric pile is high: the bipolar plate sealing structure only uses one sealing element for sealing, and the distance between the anode plate and the cathode plate is obviously reduced; meanwhile, the membrane electrode adopts a frameless or narrow frame design, so that the weight of the galvanic pile is further reduced, and the volume power density of the galvanic pile is increased.
Secondly, the assembly is simpler: the bipolar plate sealing structure adopts a sealing element for sealing, and the membrane electrode is directly bonded with the polar plate, so that the number of parts needing to be assembled is reduced, and the assembly is simpler.
Thirdly, the leakage risk is low: the membrane electrode in the bipolar plate sealing structure adopts a frameless or narrow frame design, the sealing surface needing sealing is changed from four surfaces into two surfaces, and the leakage risk is lower.
Drawings
FIG. 1 is a schematic structural diagram of an anode plate according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a cathode plate in an embodiment of the present invention;
figure 3 is a cross-sectional view of a bipolar plate seal arrangement in an embodiment of the present invention.
The reference numbers in the figures indicate:
1. the device comprises an anode plate, a membrane electrode, a cathode plate, an insulating paint layer, an adhesive, a sealing element and a sealing element, wherein the anode plate 2, the membrane electrode 3, the cathode plate 4, the insulating paint layer 5, the adhesive 6 and the sealing element are sequentially arranged on the anode plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The present invention relates to a fuel cell bipolar plate sealing structure and a sealing method for the same, and a specific example is provided below.
The utility model provides a fuel cell bipolar plate seal structure for sealed between anode plate 1, membrane electrode 2 and the negative plate 3, seal structure includes insulating paint layer 4, gluing agent 5 and sealing member 6, and insulating paint layer 4 and gluing agent 5 are all sprayed on anode plate 1 or negative plate 3, and insulating paint layer 4 and gluing agent 5 are sprayed on anode plate 1 in this embodiment. The insulating paint layer 4 is sprayed on the edge area of the anode plate, the adhesive 5 is coated on the reaction area of the anode plate, the membrane electrode 2 is fixed on the anode plate 1 through the adhesive 5, and the sealing piece 6 is positioned in the sealing groove of the anode plate 1.
The insulating paint layer 4 in the embodiment is used for preventing the short circuit of the cathode plate and the anode plate, and is required to have a good bonding effect with the anode plate 1, resist high and low temperatures of-40 to 90 ℃, resist glycol and water, and have a good insulating effect. Therefore, the insulating paint layer 4 selected in the embodiment is acrylic acid three-proofing paint, and the specific model is Dow Corning SE 9176.
The adhesive 5 in the embodiment is required to be cured at room temperature, precipitates of the adhesive cannot generate adverse effects on the catalyst, and the adhesive has good bonding effects with the frame and the polar plate of the membrane electrode 2, is resistant to high and low temperatures of-40-90 ℃, and is resistant to ethylene glycol and water. Therefore, the adhesive 5 selected in this embodiment is an epoxy resin adhesive, and the specific model is 3M DP 420. The adhesive 5 is coated on the anode plate 1 in a dispensing or silk-screen manner.
The sealing member 6 in this embodiment selects a silica gel sealing ring, and the quantity is one, and the sealing is performed through a compression sealing mode. The selected silica gel sealing ring can be a Dow Corning RBB series or a Wacker RTV series sealing ring.
The membrane electrode 2 in the embodiment adopts a frameless or narrow-frame design, the frame length range of the narrow-frame membrane electrode is 3-5 mm, and both the frameless membrane electrode and the narrow-frame membrane electrode can be directly bonded on the anode plate 1 through the adhesive 5.
The embodiment also relates to a sealing method for the sealing structure, which specifically comprises the following steps:
step 1: selecting a polar plate needing to be sprayed with an insulating paint layer and an adhesive;
step 2: spraying an insulating paint layer on the edge area of the polar plate;
and step 3: gluing an adhesive in a polar plate reaction area in a dispensing or silk-screen printing mode, and then bonding the membrane electrode and the polar plate through the adhesive;
and 4, step 4: and installing the sealing element in the sealing groove of the polar plate for compression sealing.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A fuel cell bipolar plate sealing structure is used for sealing among an anode plate (1), a membrane electrode (2) and a cathode plate (3), and is characterized by comprising an insulating paint layer (4), an adhesive (5) and a sealing element (6); the insulating paint layer (4) and the adhesive (5) are sprayed on the anode plate (1) or the cathode plate (3); the insulating paint layer (4) is sprayed on the edge area of the polar plate; the adhesive (5) is coated on the polar plate reaction area; the membrane electrode (2) is fixed on the polar plate through an adhesive (5); the sealing element (6) is positioned in the sealing groove of the polar plate.
2. The fuel cell bipolar plate sealing structure according to claim 1, wherein the insulating paint layer (3) is acrylic tri-proof paint.
3. The fuel cell bipolar plate sealing structure according to claim 1, wherein said adhesive (5) is an epoxy adhesive.
4. A fuel cell bipolar plate sealing structure according to claim 3, wherein said adhesive (5) is applied on the anode plate (2) by means of dispensing or screen printing.
5. A fuel cell bipolar plate sealing structure according to claim 1, wherein said sealing member (6) is a silicone gasket.
6. A fuel cell bipolar plate sealing structure according to claim 5, wherein said sealing member (6) is one in number.
7. A fuel cell bipolar plate sealing arrangement according to claim 5, wherein said sealing member (6) is sealed by means of a compression seal.
8. The fuel cell bipolar plate sealing structure according to claim 1, wherein the membrane electrode (2) is a borderless membrane electrode or a narrow-border membrane electrode; the frame length of the narrow-frame membrane electrode is 3-5 mm.
9. A sealing method for a fuel cell bipolar plate sealing structure according to claim 1, comprising the steps of:
step 1: selecting a polar plate needing to be sprayed with an insulating paint layer (4) and an adhesive (5);
step 2: spraying an insulating paint layer (4) on the edge area of the polar plate;
and step 3: gluing an adhesive (5) in a polar plate reaction area in a dispensing or silk-screen printing mode, and then bonding the membrane electrode (2) and the polar plate through the adhesive (5);
and 4, step 4: and (3) installing a sealing element (6) in the polar plate sealing groove for compression sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010217696.9A CN111384416A (en) | 2020-03-25 | 2020-03-25 | Fuel cell bipolar plate sealing structure and sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010217696.9A CN111384416A (en) | 2020-03-25 | 2020-03-25 | Fuel cell bipolar plate sealing structure and sealing method |
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| Publication Number | Publication Date |
|---|---|
| CN111384416A true CN111384416A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010217696.9A Pending CN111384416A (en) | 2020-03-25 | 2020-03-25 | Fuel cell bipolar plate sealing structure and sealing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599811A (en) * | 2020-12-11 | 2021-04-02 | 上海氢晨新能源科技有限公司 | Fuel cell unit, fuel cell and manufacturing method thereof |
| CN112713282A (en) * | 2020-12-29 | 2021-04-27 | 国科微城市智能科技(南京)有限责任公司 | Outer packaging shell for producing efficient hydrogen fuel cell |
| CN112909280A (en) * | 2020-12-31 | 2021-06-04 | 大连融科储能技术发展有限公司 | Method for insulating surface edge of bipolar plate and application thereof |
| CN114068980A (en) * | 2021-11-03 | 2022-02-18 | 江苏耀扬新能源科技有限公司 | Single cell based on fuel cell stack process and manufacturing method thereof |
| CN115048818A (en) * | 2022-08-15 | 2022-09-13 | 潍柴动力股份有限公司 | Bipolar plate strength simulation model building method and device and simulation model building equipment |
-
2020
- 2020-03-25 CN CN202010217696.9A patent/CN111384416A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599811A (en) * | 2020-12-11 | 2021-04-02 | 上海氢晨新能源科技有限公司 | Fuel cell unit, fuel cell and manufacturing method thereof |
| CN112713282A (en) * | 2020-12-29 | 2021-04-27 | 国科微城市智能科技(南京)有限责任公司 | Outer packaging shell for producing efficient hydrogen fuel cell |
| CN112909280A (en) * | 2020-12-31 | 2021-06-04 | 大连融科储能技术发展有限公司 | Method for insulating surface edge of bipolar plate and application thereof |
| CN112909280B (en) * | 2020-12-31 | 2022-02-11 | 大连融科储能技术发展有限公司 | Method for insulating surface edge of bipolar plate and application thereof |
| CN114068980A (en) * | 2021-11-03 | 2022-02-18 | 江苏耀扬新能源科技有限公司 | Single cell based on fuel cell stack process and manufacturing method thereof |
| CN115048818A (en) * | 2022-08-15 | 2022-09-13 | 潍柴动力股份有限公司 | Bipolar plate strength simulation model building method and device and simulation model building equipment |
| CN115048818B (en) * | 2022-08-15 | 2023-01-06 | 潍柴动力股份有限公司 | Method and device for building bipolar plate strength simulation model and simulation model building equipment |
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