CN111697247A - Composite graphite bipolar plate and preparation method thereof - Google Patents
Composite graphite bipolar plate and preparation method thereof Download PDFInfo
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- CN111697247A CN111697247A CN202010576738.8A CN202010576738A CN111697247A CN 111697247 A CN111697247 A CN 111697247A CN 202010576738 A CN202010576738 A CN 202010576738A CN 111697247 A CN111697247 A CN 111697247A
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- flow channel
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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
- H01M8/023—Porous and characterised by the material
- H01M8/0232—Metals or alloys
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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
- H01M8/023—Porous and characterised by the material
- H01M8/0234—Carbonaceous material
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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
- H01M8/023—Porous and characterised by the material
- H01M8/0241—Composites
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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
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Fuel Cell (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention provides a composite graphite bipolar plate, comprising: a porous metal plate having a plurality of through holes; flow channel ridges arranged on opposite surfaces of the porous metal plate; and the fixing column is arranged in the through hole corresponding to the flow channel ridge, and the fixing column and the flow channel ridge are integrally molded. According to the invention, the graphite powder is embedded into the porous plate to realize effective combination, the toughness and strength of the graphite plate are improved through the metal framework, the comprehensive performance of the bipolar plate is effectively improved, the thickness of the bipolar plate is favorably reduced, and meanwhile, the forming process is simple, and the batch production is facilitated.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a composite graphite bipolar plate and a preparation method thereof.
Background
The graphite bipolar plate adopted at present has large brittleness and large compression deformation due to the characteristics of graphite, so that the damage such as cracking and the like is very easy to occur in the repeated installation process of a fuel cell stack, and the overall performance and the yield of the fuel cell are seriously influenced. The method of simply sticking the graphite flow channel on the metal plate is adopted, the bonding force between the metal plate and the graphite flow channel is poor, and the bonding process after the graphite plate is formed is complicated.
Disclosure of Invention
The composite graphite bipolar plate and the preparation method provided by the invention can improve the binding force between the metal plate and the flow channel.
In a first aspect, the present invention provides a composite graphite bipolar plate comprising:
a porous metal plate having a plurality of through holes;
flow channel ridges arranged on opposite surfaces of the porous metal plate;
and the fixing column is arranged in the through hole corresponding to the flow channel ridge, and the fixing column and the flow channel ridge are integrally molded.
Optionally, a connecting portion is disposed between two flow channel ridges adjacently disposed on the same surface of the porous metal plate, and the connecting portion and the flow channel ridges are integrally molded.
Optionally, a fixing column is arranged in the through hole corresponding to the connecting portion, and the fixing column and the connecting portion are integrally molded.
Optionally, the porous metal plate is a titanium plate, a nickel plate or a stainless steel plate.
Optionally, the material of the flow channel ridge and the fixing column includes: 5-10 parts of flake graphite with the diameter of 20-50 mm, 1-5 parts of graphene, 60-65 parts of graphite powder, 12-18 parts of phenolic resin and 1-5 parts of heat-conducting carbon fiber.
Optionally, the thickness of the porous metal plate is 0.1-0.4 mm.
Optionally, the aperture of the through hole is 10-100 um.
The composite graphite bipolar plate provided by the invention provides a method for quickly forming and effectively improving the binding force, the effective binding is realized by embedding graphite powder into the porous plate, the toughness and the strength of the graphite plate are improved by the metal framework, the comprehensive performance of the bipolar plate is effectively improved, the thickness of the bipolar plate is favorably reduced, and meanwhile, the forming process is simple and the batch production is facilitated. The invention improves the binding force by embedding graphite into the porous plate and improves the graphite strength by the porous metal plate, and is particularly suitable for large-scale processing.
In a second aspect, the present invention provides a method for preparing the composite graphite bipolar plate, including:
mixing 5-10 parts of flake graphite with the diameter of 20-50 mm, 1-5 parts of graphene, 60-65 parts of graphite powder, 12-18 parts of phenolic resin and 1-5 parts of heat-conducting carbon fiber to form a mixture;
the mixture is molded on a porous metal plate to form flow channel ridges and fixing posts.
Optionally, the molding the mixture on a porous metal plate to form flow channel ridges and fixing posts includes:
fixing a porous metal plate in a mold, and filling the mold with a mixture;
heating the mixture to 150-;
heating the mixture to 260-280 ℃ at a heating speed of 15-30 ℃/min, maintaining the pressure of 20-25MPa, and keeping for 5-10 min;
cooling the mixture to below 50 deg.C at 30-50 deg.C/min and removing the mold.
Optionally, mixing 5-10 parts of flake graphite with the diameter of 20-50 mm, 1-5 parts of graphene, 60-65 parts of graphite powder, 12-18 parts of phenolic resin and 1-5 parts of heat-conducting carbon fiber to form a mixture, wherein the mixture comprises: stirring for 1-3h by adopting a high-speed mixer under the conditions of 1500-3000 r/min.
The preparation method of the composite graphite bipolar plate provides a method for quickly forming and effectively improving the binding force, the graphite powder is embedded into the porous plate to realize effective binding, the toughness and the strength of the graphite plate are improved through the metal framework, the comprehensive performance of the bipolar plate is effectively improved, the thickness of the bipolar plate is favorably reduced, and meanwhile, the forming process is simple and the batch production is facilitated. The invention improves the binding force by embedding graphite into the porous plate and improves the graphite strength by the porous metal plate, and is particularly suitable for large-scale processing.
Drawings
FIG. 1 is a schematic structural view of a porous metal plate of a composite graphite bipolar plate according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a composite graphite bipolar plate according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The present embodiment provides a composite graphite bipolar plate, as shown in fig. 1, including:
a porous metal plate 1, as shown in fig. 2, having a plurality of through holes 3; optionally, the thickness of the porous metal plate 1 is 0.1-0.4 mm, for example, 0.1mm, 0.2mm, 0.3mm or 0.4mm can be selected; optionally, the aperture of the through hole 3 is 10-100 um, for example, 10um, 50um or 100um can be selected; optionally, the porous metal plate 1 is a titanium plate, a nickel plate or a stainless steel plate;
flow path ridges 2 provided on opposite surfaces of the porous metal plate 1;
the fixing column is arranged in the through hole 3 corresponding to the flow channel ridge 2, and the fixing column and the flow channel ridge 2 are integrally molded;
optionally, the material of the flow channel ridge 2 and the fixing column includes: 5-10 parts of flake graphite with the diameter of 20-50 mm, 1-5 parts of graphene, 60-65 parts of graphite powder, 12-18 parts of phenolic resin and 1-5 parts of heat-conducting carbon fiber.
The composite graphite bipolar plate of the embodiment provides a method for quickly forming and effectively improving the binding force, the graphite powder is embedded into the porous plate to realize effective binding, the toughness and the strength of the graphite plate are improved through the metal framework, the comprehensive performance of the bipolar plate is effectively improved, the thickness of the bipolar plate is favorably reduced, and meanwhile, the forming process is simple and the batch production is convenient. This embodiment promotes the cohesion through graphite embedding perforated plate, promotes graphite intensity through porous metal sheet 1, is particularly suitable for big batch processing.
Optionally, a connecting portion is disposed between two flow channel ridges 2 adjacently disposed on the same surface of the porous metal plate 1, and the connecting portion and the flow channel ridges 2 are integrally molded.
Optionally, a fixing column is arranged in the through hole 3 corresponding to the connecting portion, and the fixing column and the connecting portion are integrally molded.
Adopt connecting portion, and connecting portion and runner spine 2 integrated into one piece, connecting portion and fixed column integrated into one piece can further strengthen the cohesion between runner spine 2 and the porous metal plate 1 to connecting portion can also cover porous metal plate 1, can improve the corrosion resisting capability of metal sheet.
Example 2
The embodiment provides a preparation method of a composite graphite bipolar plate, which comprises the following steps:
mixing 5-10 parts of flake graphite with the diameter of 20-50 mm, 1-5 parts of graphene, 60-65 parts of graphite powder, 12-18 parts of phenolic resin and 1-5 parts of heat-conducting carbon fiber to form a mixture; optionally, stirring for 1-3h at 1500-.
The mixture is molded on a porous metal plate to form flow channel ridges and fixing posts.
The preparation method of the composite graphite bipolar plate provides a method for quickly forming and effectively improving the binding force, the graphite powder is embedded into the porous plate to realize effective binding, the toughness and the strength of the graphite plate are improved through the metal framework, the comprehensive performance of the bipolar plate is effectively improved, the thickness of the bipolar plate is favorably reduced, and meanwhile, the forming process is simple and the batch production is facilitated. This embodiment promotes the cohesion through graphite embedding perforated plate, promotes graphite intensity through porous metal sheet, is particularly suitable for big batch processing.
Optionally, the molding the mixture on a porous metal plate to form flow channel ridges and fixing posts includes:
fixing a porous metal plate in a mold, and filling the mold with a mixture;
heating the mixture to 150-;
heating the mixture to 260-280 ℃ at a heating speed of 15-30 ℃/min, maintaining the pressure of 20-25MPa, and keeping for 5-10 min;
cooling the mixture to below 50 deg.C at 30-50 deg.C/min and removing the mold.
By adopting the mode, the runner ridge can be smoothly molded, and demolding after molding of the runner ridge is facilitated.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A composite graphite bipolar plate, comprising:
a porous metal plate having a plurality of through holes;
flow channel ridges arranged on opposite surfaces of the porous metal plate;
and the fixing column is arranged in the through hole corresponding to the flow channel ridge, and the fixing column and the flow channel ridge are integrally molded.
2. The composite graphite bipolar plate of claim 1, wherein a connection portion is formed between two flow channel ridges disposed adjacent to each other on the same surface of the porous metal plate, and the connection portion is integrally molded with the flow channel ridges.
3. The composite graphite bipolar plate of claim 2, wherein fixing posts are provided in the through-holes corresponding to the connection parts, and the fixing posts are integrally molded with the connection parts.
4. The composite graphite bipolar plate of claim 1, wherein the porous metal plate is a titanium plate, a nickel plate or a stainless steel plate.
5. The composite graphite bipolar plate of claim 1, wherein the material of the flow channel ridges and the fixing posts comprises: 5-10 parts of flake graphite with the diameter of 20-50 mm, 1-5 parts of graphene, 60-65 parts of graphite powder, 12-18 parts of phenolic resin and 1-5 parts of heat-conducting carbon fiber.
6. The composite graphite bipolar plate of claim 1, wherein the porous metal plate has a thickness of 0.1 to 0.4 mm.
7. The composite graphite bipolar plate of claim 1, wherein the aperture of the through hole is 10-100 um.
8. A method of preparing a graphite bipolar plate as claimed in claims 1 to 7, comprising:
mixing 5-10 parts of flake graphite with the diameter of 20-50 mm, 1-5 parts of graphene, 60-65 parts of graphite powder, 12-18 parts of phenolic resin and 1-5 parts of heat-conducting carbon fiber to form a mixture;
the mixture is molded on a porous metal plate to form flow channel ridges and fixing posts.
9. The method of manufacturing a composite graphite bipolar plate according to claim 8, wherein the molding the mixture on a porous metal plate to form flow channel ridges and fixing posts comprises:
fixing a porous metal plate in a mold, and filling the mold with a mixture;
heating the mixture to 150-;
heating the mixture to 260-280 ℃ at a heating speed of 15-30 ℃/min, maintaining the pressure of 20-25MPa, and keeping for 5-10 min;
cooling the mixture to below 50 deg.C at 30-50 deg.C/min and removing the mold.
10. The method for preparing the composite graphite bipolar plate according to claim 8, wherein the step of mixing 5-10 parts of flake graphite with the diameter of 20-50 mm, 1-5 parts of graphene, 60-65 parts of graphite powder, 12-18 parts of phenolic resin and 1-5 parts of heat-conducting carbon fibers to form a mixture comprises the following steps: stirring for 1-3h by adopting a high-speed mixer under the conditions of 1500-3000 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010576738.8A CN111697247A (en) | 2020-06-22 | 2020-06-22 | Composite graphite bipolar plate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010576738.8A CN111697247A (en) | 2020-06-22 | 2020-06-22 | Composite graphite bipolar plate and preparation method thereof |
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| CN111697247A true CN111697247A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010576738.8A Pending CN111697247A (en) | 2020-06-22 | 2020-06-22 | Composite graphite bipolar plate and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113707901A (en) * | 2021-07-22 | 2021-11-26 | 一汽解放汽车有限公司 | Electrode plate and manufacturing method thereof, battery cell and fuel cell |
| CN114243045A (en) * | 2021-11-15 | 2022-03-25 | 潍柴动力股份有限公司 | Fuel cell unipolar plate and manufacturing method thereof |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113707901A (en) * | 2021-07-22 | 2021-11-26 | 一汽解放汽车有限公司 | Electrode plate and manufacturing method thereof, battery cell and fuel cell |
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| CN114243045A (en) * | 2021-11-15 | 2022-03-25 | 潍柴动力股份有限公司 | Fuel cell unipolar plate and manufacturing method thereof |
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Application publication date: 20200922 |