CN114784314A - Fuel cell bipolar plate sealing method, fuel cell and vehicle - Google Patents
Fuel cell bipolar plate sealing method, fuel cell and vehicle Download PDFInfo
- Publication number
- CN114784314A CN114784314A CN202110088609.9A CN202110088609A CN114784314A CN 114784314 A CN114784314 A CN 114784314A CN 202110088609 A CN202110088609 A CN 202110088609A CN 114784314 A CN114784314 A CN 114784314A
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- Prior art keywords
- bipolar plate
- fuel cell
- sealing
- primer
- dispensing
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
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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
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0213—Gas-impermeable carbon-containing materials
-
- 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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- Engineering & Computer Science (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to the technical field of fuel cells, in particular to a fuel cell bipolar plate sealing method, a fuel cell and a vehicle, wherein a sealing groove is formed in the bipolar plate, and a primer is coated at the bottom of the sealing groove; the invention aims to solve the problems of high surface roughness and low bonding force after glue dispensing and curing of the bipolar plate in the prior art by a primary coating process before glue dispensing of the sealing element of the bipolar plate; a glue layer is formed between the bipolar plate and the sealant, so that the steps are simple and convenient, the operation is easy, the precision requirement of required automation equipment is not high, and the bipolar plate sealant is suitable for mass production; after the glue is coated, the adhesive force can be obviously improved, the requirement that the sealing element formed by dispensing can not be damaged during the subsequent unstacking and reworking can be met, the cost is reduced, and the equipment, labor, time and the like are reduced.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell bipolar plate sealing method, a fuel cell and a vehicle.
Background
A hydrogen fuel cell is a chemical power generation device that directly converts chemical energy in fuel (hydrogen gas) into electrical energy. Because the fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electric energy through electrochemical reaction, the fuel cell is not limited by the Carnot cycle effect and is far higher than the efficiency of an internal combustion engine. In addition, the hydrogen fuel cell uses hydrogen and air as raw materials, has no mechanical transmission parts, has no harmful gas emission, and has no noise. Therefore, from the perspective of energy and ecological environment, fuel cells will be the most promising power generation technology and have a wide range of applications.
The traditional fuel cell assembly process needs to paste sealing gaskets into sealing grooves on the periphery of the bipolar plate one by one in advance, the assembly efficiency is low, and meanwhile, the sealing gaskets are easy to misplace and the fluctuation of the sizes of the sealing gaskets can cause the problem of poor sealing performance. In addition, the sealing gasket in the process can only be used for the matched bipolar plate, once the size of the bipolar plate or the shape of the sealing groove is changed, the sealing gasket is required to be redesigned and manufactured, and the universality is poor.
In order to overcome the defects, patent No. CN201910948425.8 discloses a dispensing process for a hydrogen fuel cell sealing glue line, which can change the dispensing track arbitrarily according to the requirements of the polar plate, is simple and convenient to operate, and is suitable for batch production. The solidified glue is bonded with the polar plate into a whole, so that the rapid stacking and assembling are realized, and the stacking efficiency is improved.
However, the bipolar plate of the hydrogen fuel cell is mainly made of graphite and is processed by impregnating special resin, so that the bipolar plate has high surface roughness and lower surface energy and belongs to a difficult-to-stick material. After the traditional sealing gasket is replaced by the dispensing process described in patent No. CN201910948425.8, the adhesion force of the new sealant and the graphite bipolar plate is very low, and the interface has the risk of aging when the galvanic pile is used for a long time. In addition, once the pile removal rework requirement is met after pile loading detection, sealing elements formed by glue dispensing can be damaged, glue dispensing needs to be carried out on the bipolar plates again, glue is wasted, and equipment, labor, time and the like need to be occupied.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a fuel cell bipolar plate sealing method, a fuel cell and a vehicle are provided in which the surface roughness of the fuel cell bipolar plate is improved and the sealing effect is improved.
In order to solve the above technical problems, the first technical solution adopted by the present invention is:
a sealing method of a bipolar plate of a fuel cell is characterized in that the bipolar plate is provided with a sealing groove, and the bottom of the sealing groove is coated with a primer.
Preferably, the bipolar plate is a graphite plate or a composite material plate.
Preferably, the primer is one of liquid epoxy resin and polyisocyanate resin.
Preferably, the viscosity of the primer is 300 to 5000 cps.
Preferably, the primer is applied by one of spraying, brushing and dispensing.
Preferably, the bottom of the sealing groove is coated with a primer and then cured to form a coating, wherein the curing temperature is 90-130 ℃, and the curing time is 1-120 min.
Preferably, the thickness of the coating is 10-30 um.
Preferably, the surface of the coating is subjected to dispensing to form a sealing rubber strip.
In order to solve the above technical problem, the second technical solution adopted by the present invention is:
a fuel cell comprising a plurality of bipolar plates obtained according to the fuel cell bipolar plate sealing method described above.
In order to solve the above technical problems, the third technical solution adopted by the present invention is:
a vehicle includes the fuel cell.
The invention has the beneficial effects that: through the primary coating process before the bipolar plate is subjected to glue dispensing and sealing, the problems of high surface roughness and low bonding force after glue dispensing and curing of the bipolar plate in the prior art are solved; a glue layer is formed between the bipolar plate and the sealant, so that the steps are simple and convenient, the operation is easy, the precision requirement of required automatic equipment is not high, and the method is suitable for mass production; after the glue is coated, the adhesive force can be obviously improved, the requirement that the sealing element formed by dispensing can not be damaged during the subsequent unstacking and reworking can be met, the cost is reduced, and the equipment, labor, time and the like are reduced.
Drawings
FIG. 1 is a prior art bipolar plate construction;
FIG. 2 is a cross-sectional view of a seal groove of a bipolar plate obtained by a fuel cell bipolar plate sealing method according to an embodiment of the present invention;
description of the reference symbols: 1. a sealing groove; 2. a primer; 3. and sealing rubber strips.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Example one
A sealing method of a fuel cell bipolar plate is characterized in that the bipolar plate is provided with a sealing groove, and the bottom of the sealing groove is coated with a primer.
The bipolar plate is a graphite plate or a composite material plate.
The primer is liquid epoxy resin.
The viscosity of the primer is 300cps at 25 ℃.
And spraying is adopted for coating the primer.
And curing the bottom of the sealing groove after the primer is coated on the bottom of the sealing groove to form a coating, wherein the curing temperature is 90 ℃ and the curing time is 30 min.
The thickness of the coating is 10 um.
And dispensing on the surface of the coating to form a sealing rubber strip.
Example two
A sealing method of a bipolar plate of a fuel cell is characterized in that the bipolar plate is provided with a sealing groove, and the bottom of the sealing groove is coated with a primer.
The bipolar plate is a graphite polar plate or a composite polar plate, the composite polar plate is made of graphite materials through special resin impregnation processing, the surface roughness is high, the surface energy is low, and the bipolar plate belongs to a material difficult to adhere.
The primer is one of liquid epoxy resin and polyisocyanate resin.
The viscosity of the primer is 5000cps at 25 ℃.
And dispensing is adopted for coating the primer.
And curing the bottom of the sealing groove after the primer is coated on the bottom of the sealing groove to form a coating, wherein the curing temperature is 130 ℃, and the curing time is 120 min.
The thickness of the coating is 30 um.
And dispensing on the surface of the coating to form a sealing rubber strip.
EXAMPLE III
A sealing method of a fuel cell bipolar plate is characterized in that the bipolar plate is provided with a sealing groove, and the bottom of the sealing groove is coated with a primer.
The bipolar plate is a graphite polar plate or a composite polar plate, the composite polar plate is made of graphite materials through special resin impregnation processing, the surface roughness is high, the surface energy is low, and the bipolar plate belongs to a material difficult to adhere.
The primer is one of liquid epoxy resin and polyisocyanate resin.
The viscosity of the primer was 2650cps at 25 ℃.
And coating the primer by one of spraying, brushing and dispensing.
And curing the bottom of the sealing groove after the primer is coated on the bottom of the sealing groove to form a coating, wherein the curing temperature is 110 ℃, and the curing time is 60 min.
The thickness of the coating is 25 um.
And dispensing on the surface of the coating to form a sealing adhesive tape.
Example four
A fuel cell comprising a plurality of bipolar plates obtained by the fuel cell bipolar plate sealing method according to any one of the first to third embodiments.
EXAMPLE five
A vehicle comprising the fuel cell of embodiment four.
In summary, in the dispensing process of the third embodiment, the sealing adhesive tape is formed by dispensing on the surface of the coating layer, the dispensing process disclosed in patent No. CN201910948425.8 may be used for dispensing.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. The fuel cell bipolar plate sealing method is characterized in that a sealing groove is formed in the bipolar plate, and a primer is coated at the bottom of the sealing groove.
2. The fuel cell bipolar plate sealing method as claimed in claim 1, wherein the bipolar plate is a graphite plate or a composite material plate.
3. The fuel cell bipolar plate sealing method as claimed in claim 1, wherein the primer is one of a liquid epoxy resin and a polyisocyanate resin.
4. The method for sealing a bipolar plate for a fuel cell according to claim 1, wherein the primer has a viscosity of 300 to 5000 cps.
5. The fuel cell bipolar plate sealing method as claimed in claim 1, wherein the primer is applied by one of spraying, brushing, and dispensing.
6. The method for sealing a fuel cell bipolar plate according to claim 1, wherein the coating is formed by curing after the primer is coated on the bottom of the sealing groove, and the curing temperature is 90-130 ℃ and the curing time is 1-120 min.
7. The fuel cell bipolar plate sealing method as claimed in claim 1, wherein the coating has a thickness of 10-30 um.
8. The method of claim 7, wherein a bead is formed by dispensing on the surface of the coating.
9. A fuel cell comprising a plurality of bipolar plates obtained by the fuel cell bipolar plate sealing method according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the fuel cell according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110088609.9A CN114784314A (en) | 2021-01-22 | 2021-01-22 | Fuel cell bipolar plate sealing method, fuel cell and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110088609.9A CN114784314A (en) | 2021-01-22 | 2021-01-22 | Fuel cell bipolar plate sealing method, fuel cell and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114784314A true CN114784314A (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110088609.9A Pending CN114784314A (en) | 2021-01-22 | 2021-01-22 | Fuel cell bipolar plate sealing method, fuel cell and vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN114784314A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040062976A1 (en) * | 2002-09-27 | 2004-04-01 | Wells Allan R. | Process for forming an integral gasket on a bipolar plate for a PEM fuel cell |
| CN101421099A (en) * | 2006-04-13 | 2009-04-29 | Nok株式会社 | Acrylic rubber-metal composite body |
| US20090220849A1 (en) * | 2008-02-28 | 2009-09-03 | Satoru Terada | Fuel cell separator sealing material and fuel cell separator |
| CN101698772A (en) * | 2009-06-18 | 2010-04-28 | 北京高盟化工有限公司 | Preparation method of glass sealant primer |
| CN102140304A (en) * | 2010-12-28 | 2011-08-03 | 东莞市普赛达密封粘胶有限公司 | Primer for polyurethane sealing gum and preparation method thereof |
| CN102839385A (en) * | 2012-09-18 | 2012-12-26 | 北京化工大学 | Oxygen cathode ion-exchange membrane electrolytic cell and mounting and sealing method thereof |
| CN102938468A (en) * | 2012-12-03 | 2013-02-20 | 新源动力股份有限公司 | Method for enhanced seal of fuel cell |
| CN103113819A (en) * | 2013-03-05 | 2013-05-22 | 河南省科学院化学研究所有限公司 | Primer coating for polyurethane sealant and preparation method thereof |
| WO2014050294A1 (en) * | 2012-09-26 | 2014-04-03 | 東海ゴム工業株式会社 | Method for producing laminate body and laminate body |
| CN104449443A (en) * | 2013-09-18 | 2015-03-25 | 日东电工株式会社 | Adhesive sheet |
| CN110783600A (en) * | 2019-10-01 | 2020-02-11 | 深圳市世椿智能装备股份有限公司 | Double-adhesive-tape dispensing method for hydrogen fuel cell electrode plate |
| CN110791174A (en) * | 2019-11-12 | 2020-02-14 | 成都硅宝科技股份有限公司 | Polyurethane primer and preparation method thereof |
| CN111509259A (en) * | 2020-04-14 | 2020-08-07 | 上海神力科技有限公司 | Method for improving stability of fuel cell polar plate surface adhesive |
-
2021
- 2021-01-22 CN CN202110088609.9A patent/CN114784314A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040062976A1 (en) * | 2002-09-27 | 2004-04-01 | Wells Allan R. | Process for forming an integral gasket on a bipolar plate for a PEM fuel cell |
| CN101421099A (en) * | 2006-04-13 | 2009-04-29 | Nok株式会社 | Acrylic rubber-metal composite body |
| US20090220849A1 (en) * | 2008-02-28 | 2009-09-03 | Satoru Terada | Fuel cell separator sealing material and fuel cell separator |
| CN101698772A (en) * | 2009-06-18 | 2010-04-28 | 北京高盟化工有限公司 | Preparation method of glass sealant primer |
| CN102140304A (en) * | 2010-12-28 | 2011-08-03 | 东莞市普赛达密封粘胶有限公司 | Primer for polyurethane sealing gum and preparation method thereof |
| CN102839385A (en) * | 2012-09-18 | 2012-12-26 | 北京化工大学 | Oxygen cathode ion-exchange membrane electrolytic cell and mounting and sealing method thereof |
| WO2014050294A1 (en) * | 2012-09-26 | 2014-04-03 | 東海ゴム工業株式会社 | Method for producing laminate body and laminate body |
| CN102938468A (en) * | 2012-12-03 | 2013-02-20 | 新源动力股份有限公司 | Method for enhanced seal of fuel cell |
| CN103113819A (en) * | 2013-03-05 | 2013-05-22 | 河南省科学院化学研究所有限公司 | Primer coating for polyurethane sealant and preparation method thereof |
| CN104449443A (en) * | 2013-09-18 | 2015-03-25 | 日东电工株式会社 | Adhesive sheet |
| CN110783600A (en) * | 2019-10-01 | 2020-02-11 | 深圳市世椿智能装备股份有限公司 | Double-adhesive-tape dispensing method for hydrogen fuel cell electrode plate |
| CN110791174A (en) * | 2019-11-12 | 2020-02-14 | 成都硅宝科技股份有限公司 | Polyurethane primer and preparation method thereof |
| CN111509259A (en) * | 2020-04-14 | 2020-08-07 | 上海神力科技有限公司 | Method for improving stability of fuel cell polar plate surface adhesive |
Non-Patent Citations (1)
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