CN111162289B - Inner edge positioning hot-pressing tool for bonding fuel cell bipolar plates - Google Patents
Inner edge positioning hot-pressing tool for bonding fuel cell bipolar plates Download PDFInfo
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- CN111162289B CN111162289B CN201911416109.2A CN201911416109A CN111162289B CN 111162289 B CN111162289 B CN 111162289B CN 201911416109 A CN201911416109 A CN 201911416109A CN 111162289 B CN111162289 B CN 111162289B
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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
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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
- H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
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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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- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to an inner edge positioning hot-pressing tool for bonding a fuel cell bipolar plate, which comprises a positioning assembly, a graphite base plate (1) and a graphite cover plate (2), wherein the graphite base plate (1) and the graphite cover plate (2) are of a square structure, the positioning assembly is respectively fixed in first positioning round holes at four corners of the graphite base plate (1) and corresponds to two perpendicular-to-vertical edges of a cavity opening (12) and a hydrogen opening (14) which are close to the four corners on the bipolar plate, the positioning assembly comprises two inner edge positioning pins (3), and the inner edge positioning pins (3) are respectively attached to the perpendicular-to-vertical edges. Compared with the prior art, the invention has the advantages of improving the alignment precision of the bipolar plate, being suitable for the bipolar plates with different thermal expansion coefficients of materials and the like.
Description
Technical Field
The invention relates to the field of fuel cells, in particular to an inner edge positioning hot-pressing tool for bonding a bipolar plate of a fuel cell.
Background
The bipolar plate is one of the important components of the fuel cell, and has the functions of fuel gas distribution, current conduction, reaction heat dissipation, structural support and the like. The bipolar plate of the fuel cell is formed by bonding a cathode single plate and an anode single plate, and the front side, the back side and the inside of the bipolar plate are provided with dense flow channel structures for uniformly distributing gas and cooling liquid. In order to improve the power of the fuel cell, the bipolar plates which are as thin as possible are used, so that the size of the flow channel structure is more dense and fine, and the requirement on the accuracy of the alignment bonding of the cathode single plate and the anode single plate is higher and higher.
At present, a bipolar plate is usually manufactured by coating a layer of adhesive (a fast thermosetting adhesive is generally used to improve production efficiency) on an adhesive groove on one surface of a cathode (anode) single plate having a coolant flow channel structure, and then adhering and curing the surface of the anode (cathode) single plate having the coolant flow channel structure, which is aligned with the surface of the cathode (anode) single plate coated with the adhesive. In the prior art, only the outer positioning and hole positioning modes are used for assisting the bipolar plate bonding, the tolerance of the inner positioning pin for allowing the polar plate to thermally expand is difficult to calculate in the hot-pressing curing process, and the tolerance inevitably increases the degree and possibility of bonding dislocation of the bipolar plate, thereby influencing the size and performance of the bipolar plate in all aspects.
Chinese patent CN108417859A discloses a bipolar plate bonding alignment device, which uses a hole-positioning method to assist the bipolar plate bonding by providing a support bottom plate, a laminated flat plate and a pressure-bearing end plate, but this method is very difficult to use in the assembly process, and is not suitable for the material with larger thermal expansion rate as the outside positioning method.
Disclosure of Invention
The invention aims to overcome the defects that the traditional positioning mode in the prior art needs to be provided with thermal expansion tolerance, so that the positioning is not accurate enough, and the traditional positioning mode cannot be used for materials with too large thermal expansion coefficients, and provides the inner edge positioning hot-pressing tool for bonding the fuel cell bipolar plates.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an interior limit location hot pressing frock for bonding of fuel cell bipolar plate, includes locating component, still includes graphite bottom plate and graphite apron, graphite bottom plate and graphite apron are the cube structure, locating component is fixed in the first locating round hole in four corners of graphite bottom plate respectively, correspond two right angle sides that are close to the cavity mouth and the hydrogen mouth mutually perpendicular in four corners on the bipolar plate, locating component includes two interior limit locating pins, interior limit locating pin laminate respectively in on the right angle side.
The graphite cover plate is provided with an exhaust groove, and a plurality of exhaust holes are formed in the exhaust groove.
The exhaust groove is perpendicular to the long edge of the graphite cover plate, and the length of the exhaust groove is equal to that of the wide edge of the graphite cover plate.
The graphite cover plate is provided with a second positioning round hole corresponding to the inner side positioning pin, and the second positioning round hole corresponding to one of the inner side positioning pins of each group of positioning components is located in the exhaust groove.
Handles are arranged on two sides of the wide edge of the graphite bottom plate.
The handle is fixed on the graphite bottom plate through a fixing bolt.
The length and the width of the graphite cover plate are both smaller than those of the graphite bottom plate.
Compared with the prior art, the invention has the following beneficial effects:
1. the inner edge positioning pin of the positioning assembly is arranged on two perpendicular-to-each other right-angle sides of the upper cavity opening and the hydrogen opening close to four corners, the design that the inner edge positioning pin is positioned on the inner edge is suitable for hot-press bonding of bipolar plates with different material thermal expansion coefficients, and meanwhile, the reserved thermal expansion tolerance is not considered, so that the alignment precision of the bonding of the bipolar plates is improved.
2. The invention can place a plurality of groups of cathode single plates and anode single plates on the inner positioning pins to carry out batch assembly of the bipolar plates, thereby improving the assembly efficiency of the bipolar plates and simultaneously not damaging the positioned points of the bipolar plates.
3. The handles are arranged on the two sides of the wide edge of the graphite bottom plate, so that the graphite bottom plate is convenient for operators to take and place.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of an anode single plate according to the present invention;
fig. 3 is a schematic structural diagram of a cathode single plate according to the present invention.
Reference numerals:
1-a graphite baseplate; 2-a graphite cover plate; 3-inner edge locating pin; 4-an exhaust groove; 5-air exhaust hole; 6-a handle; 7-the position of the inner edge positioning pin on the anode single plate; 8-a bonding groove; 9-coolant flow channel; 10-a hydrogen gas flow channel; 11-a seal groove; 12-a cavity port; 13-coolant port; 14-hydrogen gas port.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, an interior limit location hot pressing frock for bonding of fuel cell bipolar plate, including locating component, its characterized in that still includes graphite bottom plate 1 and graphite apron 2, graphite bottom plate 1 and graphite apron 2 are the cubic structure, locating component is fixed in respectively in the first locating circular hole in four corners of graphite bottom plate 1, as shown in fig. 2, locating component corresponds two right-angle sides that are close to cavity mouth 12 and hydrogen mouth 14 mutually perpendicular at four corners on the bipolar plate respectively, locating component includes interior limit locating pin 3 in two, interior limit locating pin 3 pastes respectively on the right-angle side.
An exhaust groove 4 is arranged on the graphite cover plate 2, and a plurality of exhaust holes 5 are arranged in the exhaust groove 4.
The exhaust grooves 4 are perpendicular to the long sides of the graphite cover plates 2, and the length of the exhaust grooves 4 is equal to that of the wide sides of the graphite cover plates 2.
Be equipped with the second location round hole that corresponds interior limit locating pin 3 on the graphite apron 2, and the second location round hole that interior limit locating pin 3 corresponds of two interior limit locating pins 3 of every group locating component is located exhaust duct 4.
Handles 6 are arranged on two sides of the wide edge of the graphite bottom plate 1.
The handle 6 is fixed on the graphite bottom plate 1 through a fixing bolt.
The length and the width of the graphite cover plate 2 are both smaller than those of the graphite bottom plate 1.
Example one
Coating a layer of adhesive on a bonding groove 8 of the anode single plate, placing the anode single plate on a graphite bottom plate 1 from the position 7 of the inner edge positioning pin 3 on the anode single plate in an upward mode of the adhesive, placing a cooling liquid flow channel 9 upwards, then placing the cooling liquid flow channel 9 on the corresponding cathode single plate downwards in an aligned mode, and completing the bonding alignment of the bipolar plate. After the anode single plates and the cathode single plates are stacked in the same mode, one or more graphite cover plates 2 are placed according to the stacking condition, the exhaust grooves 4 of the graphite cover plates 2 face upwards, the upper surfaces of the graphite cover plates 2 need to exceed the top ends of the inner edge positioning pins 3, and after assembly is completed, the whole tool is placed on a hot press for hot press solidification.
In addition, it should be noted that the specific embodiments described in the present specification may have different names, and the above descriptions in the present specification are only illustrations of the structures of the present invention. Minor or simple variations in the structure, features and principles of the present invention are included within the scope of the present invention. Various modifications or additions may be made to the described embodiments or methods may be similarly employed by those skilled in the art without departing from the scope of the invention as defined in the appending claims.
Claims (8)
1. The utility model provides an interior limit location hot pressing frock for fuel cell bipolar plate bonds, includes locating component, its characterized in that still includes graphite bottom plate (1) and graphite apron (2), graphite bottom plate (1) and graphite apron (2) are the cube structure, locating component is fixed in the first locating round hole in four corners of graphite bottom plate (1) respectively, corresponds two right angle sides that are close to cavity mouth (12) and hydrogen mouth (14) mutually perpendicular on the bipolar plate at four corners, locating component includes two interior limit locating pins (3), interior limit locating pin (3) laminate respectively in on the right angle side, and two interior limit locating pin (3) laminate respectively in the different edges on right angle side.
2. The inner edge positioning hot-pressing tool for bonding the fuel cell bipolar plate as claimed in claim 1, wherein the graphite cover plate (2) is provided with an exhaust groove (4).
3. The inner edge positioning hot-pressing tool for bonding the fuel cell bipolar plate as claimed in claim 2, wherein a plurality of exhaust holes (5) are formed in the exhaust groove (4).
4. The inner edge positioning hot-pressing tool for bonding the fuel cell bipolar plate as claimed in claim 2, wherein the exhaust groove (4) is perpendicular to the long edge of the graphite cover plate (2), and the length of the exhaust groove (4) is equal to the length of the wide edge of the graphite cover plate (2).
5. The inner edge positioning hot-pressing tool for bonding the fuel cell bipolar plate according to claim 2, wherein a second positioning round hole corresponding to the inner edge positioning pin (3) is formed in the graphite cover plate (2), and the second positioning round hole corresponding to one inner edge positioning pin (3) of the two inner edge positioning pins (3) of each group of positioning assemblies is located in the exhaust groove (4).
6. The inner edge positioning hot-pressing tool for bonding the fuel cell bipolar plate as claimed in claim 1, wherein handles (6) are arranged on two sides of the wide edge of the graphite bottom plate (1).
7. The inner edge positioning hot-pressing tool for bonding the fuel cell bipolar plate as claimed in claim 6, wherein the handle (6) is fixed on the graphite bottom plate (1) through a fixing bolt.
8. The inner edge positioning hot-pressing tool for bonding the fuel cell bipolar plate as claimed in claim 1, wherein the length and the width of the graphite cover plate (2) are both smaller than those of the graphite base plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911416109.2A CN111162289B (en) | 2019-12-31 | 2019-12-31 | Inner edge positioning hot-pressing tool for bonding fuel cell bipolar plates |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911416109.2A CN111162289B (en) | 2019-12-31 | 2019-12-31 | Inner edge positioning hot-pressing tool for bonding fuel cell bipolar plates |
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| Publication Number | Publication Date |
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| CN111162289A CN111162289A (en) | 2020-05-15 |
| CN111162289B true CN111162289B (en) | 2021-07-09 |
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| CN201911416109.2A Active CN111162289B (en) | 2019-12-31 | 2019-12-31 | Inner edge positioning hot-pressing tool for bonding fuel cell bipolar plates |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467159B (en) * | 2020-12-07 | 2022-09-30 | 江苏氢导智能装备有限公司 | Automatic bonding and pressurizing equipment and bonding and curing system for graphite bipolar plate |
| CN113793940A (en) * | 2021-08-27 | 2021-12-14 | 一汽解放汽车有限公司 | Bipolar plate bonding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20110135207A (en) * | 2010-06-10 | 2011-12-16 | 삼성에스디아이 주식회사 | Fuel cell stack |
| DE102010063410A1 (en) * | 2010-12-17 | 2012-06-21 | Theodor Gräbener GmbH & Co. KG | Bipolar plate, useful for fuel cell- or electrolytic converter stacks, comprises many bipolar plates arranged in stack, and an electrolyte membrane respectively provided between two adjacent bipolar plates and a gas diffusion layer |
| CN102832398B (en) * | 2012-09-06 | 2014-11-05 | 江苏冰城电材股份有限公司 | Novel processing tool for graphite carbon plate of proton exchange membrane fuel cell |
| CN102969513B (en) * | 2012-12-03 | 2015-05-20 | 上海交通大学 | Large-area metal bipolar plate for automobile fuel cell |
| CN203596392U (en) * | 2013-12-03 | 2014-05-14 | 宜兴市四通家电配件有限公司 | Connecting reinforcement removal device for bipolar plate of proton exchange membrane fuel cell |
| CN105552006B (en) * | 2016-01-28 | 2018-06-22 | 北京北方华创微电子装备有限公司 | A kind of vertical heat processing apparatus |
| CN206810992U (en) * | 2017-06-20 | 2017-12-29 | 厦门众盛精密电路有限公司 | High-precision positioning die with guide pillar |
| CN108063264B (en) * | 2017-12-18 | 2020-10-02 | 中国科学院青岛生物能源与过程研究所 | Graphite-metal frame composite bipolar plate and preparation method thereof |
| CN108417859B (en) * | 2018-02-07 | 2020-12-15 | 广东国鸿氢能科技有限公司 | Bipolar plate bonding alignment device |
| JP7052442B2 (en) * | 2018-03-14 | 2022-04-12 | トヨタ自動車株式会社 | How to make a fuel cell stack |
| CN108767290A (en) * | 2018-05-28 | 2018-11-06 | 上海治臻新能源装备有限公司 | A kind of self-positioning package assembly for fuel cell assembly |
| CN110767918B (en) * | 2018-07-27 | 2021-07-16 | 北京英博新能源有限公司 | Single cell and assembly method thereof, fuel cell stack and preparation method thereof |
| CN208690393U (en) * | 2018-09-10 | 2019-04-02 | 律致新能源科技(上海)有限公司 | The automatic aligning mechanism of fuel battery double plates and proton exchange membrane |
| CN109301293B (en) * | 2018-10-24 | 2023-08-29 | 南京大学 | Fuel cell membrane electrode preparation process and hot-pressing die thereof |
| CN109623245B (en) * | 2019-01-14 | 2024-02-09 | 安徽明天氢能科技股份有限公司 | Full-automatic welding fixture for bipolar plate of hydrogen fuel cell |
| CN110534764A (en) * | 2019-08-07 | 2019-12-03 | 浙江锋源氢能科技有限公司 | Fuel battery metal double polar plate welding fixture |
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