CN102315458A - Production method for graphite bipolar plate of fuel cell - Google Patents
Production method for graphite bipolar plate of fuel cell Download PDFInfo
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- CN102315458A CN102315458A CN201010217390XA CN201010217390A CN102315458A CN 102315458 A CN102315458 A CN 102315458A CN 201010217390X A CN201010217390X A CN 201010217390XA CN 201010217390 A CN201010217390 A CN 201010217390A CN 102315458 A CN102315458 A CN 102315458A
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- bipolar plate
- bipolar plates
- graphite
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- fuel cell
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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
Abstract
The invention provides a production method for a graphite bipolar plate of a fuel cell, which comprises the following steps of: A) taking a high-purity graphite block which is baked for one time or is soaked for one time and baked for two times as a raw material, and mechanically cutting the graphite block into bipolar plate biscuits; B) flatly grinding the bipolar plate biscuits into bipolar plate sheets; C) using a horizontal milling cutter which is formed by a plurality of parallel circular saw blades to process a straight-through flow field structure with multiple grooves which are distributed in parallel to form semi-finished bipolar plate products; and D) sealing the semi-finished bipolar plate products by using epoxy glue and conducting solidification to obtain finished bipolar plate products. Compared with the prior art, the cost of the bipolar plate of the fuel cell is greatly reduced from the aspects of the selection of the raw material, the flow field design of the graphite bipolar plate, the processing and the like, and the production method is particularly suitable for the production of the bipolar plate with deep runners.
Description
Technical field
The present invention relates to fuel cell, relate in particular to a kind of manufacture method of graphite bipolar plate of fuel battery.
Background technology
Bipolar plates (Bipolar plate) is one of critical component of fuel cell, and it plays the important function of conduction, isolation hydrogen and oxygen/air, even transport of reactant gases body in battery.Main at present graphite bi-polar plate, metal double polar plates, composite dual-electrode plates and the die-pressed graphite bipolar plates of adopting of fuel battery double plates.The graphite bi-polar plate weight that extensively adopts at present is about 60%～70% of pile total weight, and total cost reaches 60%.
About composite dual-electrode plates, patent CN1294669C discloses a kind of manufacturing approach, and adopting the mesocarbon particle is raw material, is reinforcing material with the carbon fiber, is dual polar plates of proton exchange membrane fuel cell through the gel injection molding and forming technology one-shot forming.At first, the preparation gel injection-moulding is used monomer solution, joins mesocarbon particle and carbon fiber in the monomer solution in proportion afterwards; Stirring obtains stable slurry, then slurry is poured in the metal die that has reverse gas flow, is incubated to monomer and crosslinking agent complete reaction; Obtain the bipolar plates biscuit, afterwards with the biscuit oven dry, behind the sintering; Adopt thermosetting resin to carry out sealing of hole, the resin charing at high temperature after will solidifying at last promptly obtains the carbon/carbon compound material bipolar plates.The bipolar plates that the present invention makes have the mechanical strength height, in light weight, conduct electricity very well, long-time running is to Proton Exchange Membrane Fuel Cells nonhazardous and pollution, cheap characteristics.
Patent CN1300875C discloses a kind of in-situ ring-opening polymerization and expanded graphite system fuel battery double plates and method for making; The in-situ ring-opening polymerization that utilizes cheap expanded graphite to fill thermal-ring-opening polymerization for filler produces the nano composite material presoma; And process fuel battery double plates with the nano composite material presoma, this bipolar plates has good conductivity, low manufacturing cost; Simple processability, and have good gas-barrier properties ability and anti-cracking performance.
About the die-pressed graphite bipolar plates; Generally choose thermosetting resin or thermoplastic resin as binding agent (like epoxy resin, vinylite, melamine resin, aromatic liquid crystal polymer etc.); With the material with carbon element is conducting base, and through die pressing or injection molding moulding, the flow field can directly obtain in forming process; Processing technology is suitable for producing in batches, has the two-fold advantage of metal double polar plates and graphite bi-polar plate.The antiacid corrosive nature of die-pressed graphite bipolar plates reaches the contact resistance aspect with electrode diffusion layer, obviously is superior to metal double polar plates.
Die-pressed graphite bipolar plates employing graphite is done aggregate, macromolecular material is made adhesive and prepared composite material double pole plate through the mold pressing one-shaping technique; Graphite is given bipolar plates and is had certain conductivity and thermal conductivity, and adhesive is then given bipolar plates and had certain intensity.Performances such as the conduction of bipolar plates, heat conduction and intensity are the factors of mutual restriction, how to handle both relations well, make its overall performance can both satisfy instructions for use and have certain degree of difficulty.Adhesive has two types of thermosetting and thermoplasticity usually, uses thermosetting resin to make adhesive and suppresses with wet mash usually, obtain intensity>=510MPa, and density reaches 1.8-1.95g/cm
3Bipolar plates, common needed pressure is higher.Under the high pressure, liquid resin in the wet feed and part graphite powder are extruded die cavity, make the intensity decreases of bipolar plates; If use thermoplastic resin, most of thermoplastic softening point is lower, and the bipolar plates of preparation deforms when in pile, using.Therefore the selection of adhesive and optimization also have certain degree of difficulty.In the process of preparation bipolar plates, owing to used adhesive, cause producing bonding between product surface and the metal die, especially there is the bipolar plates of complex flowfield on the surface, and it is even more serious to bond, and the quality that makes product can't be met the demands.Therefore in guaranteeing efficient one-time formed production technology, how to guarantee the smooth demoulding and make bipolar plate surfaces bright and clean have many technological problemses to need to solve.From the angle of mass production, require the powder rerum natura stable, demoulding speed is fast.And resinoid all has certain storage time, and the meticulous flow field of bipolar plates requires demoulding speed slower, and these two aspects all cause the availability of material to descend.Therefore how preparing the stable material of rerum natura or keeping material physical properties stable property is the key issue that mass production need solve.No matter adopt thermosetting or thermoplastic resin to make adhesive, its preparation technology will pass through the process of heating-compacting-cooling-demoulding.The speed of mold heated, cooling is the principal element of decision production efficiency.Present compacting all is to adopt single operation, and the cycle is longer, but can realize that the continuous production of mass has difficulties through the heating and cooling device of improvement equipment.
About metal double polar plates: the advantage of metal double polar plates be good conductivity, mechanical strength high, airtight, be prone to processing, be easy to produce in batches, and thickness can reduce greatly, can increase substantially the weight and volume specific power of battery pile.But common metallic plate (like stainless steel, aluminium alloy and titanium plate etc.) is prone to be corroded in the operational environment of PEMFC, causes contact resistance increase, electrode catalyst and film to be polluted, and battery performance reduces.Therefore, when adopting metal as the bipolar plate material of PEMFC, common method is that modification is carried out in the metal surface at present.But surface treatment method can only improve the corrosion resistance of metal bipolar panel material in pile long-time running process to a certain extent; Surface treatment method relates to many technologies and problem of materials simultaneously; Thereby the also corresponding battery cost that increased, whole structure is also not really desirable.
Conventional graphite plate machining remains scheme the most frequently used in the present fuel battery double plates, the porous breathable of graphite material own be prone to characteristics such as crisp, cause and adopt the pem fuel pile cost of graphite bi-polar plate very high, reliability is relatively low.For fuel cell volume and the less demanding occasion of weight, traditional graphite cake machining process still plays an important role.
Summary of the invention
The object of the invention in order to overcome the deficiency that above-mentioned prior art exists, provides the manufacture method of the graphite bipolar plate of fuel battery that a kind of method is simple, cost of manufacture is low exactly.
To achieve these goals, the present invention has adopted following technical scheme: a kind of manufacture method of graphite bipolar plate of fuel battery may further comprise the steps:
A, the high purity graphite piece that soaks two roastings with 1 roasting or 1 are raw material, and machine cuts becomes the bipolar plates biscuit;
B, bipolar plates biscuit plain grinding is become the bipolar plates sheet material;
C, the milling cutter for sleeping in that adopts parallel multi-disc wafer saw blade row row to form process the through type flow field structure of the parallel distribution of multiple-grooved on the bipolar plates sheet material, form the bipolar plates semi-finished product;
D, the bipolar plates semi-finished product are sealed the back with epoxy glue solidify, become the bipolar plates finished product.
The present invention makes it compared with prior art owing to adopted above technical scheme, has following advantage and characteristics:
1, owing to adopted 1 roasting or 1 to soak the high purity graphite piece raw material of two roastings; With at present commonly used three soak four roastings the high purity graphite piece compare; Raw material are made and have been removed time consumption and energy consumption processes such as soaking roasting from, and the cost of raw material obviously reduces, and price is soaked 1/2 of four roasting high purity graphite pieces less than tradition three.
2, because the flow Field Design of graphite bi-polar plate adopts the through type flow field structure of the parallel distribution of multiple-grooved of being convenient to rapid processing; Manufacturing process adopts the milling cutter for sleeping in of parallel multi-disc wafer saw blade row row composition, has increased substantially the working (machining) efficiency of graphite bipolar plate of fuel battery.
3, owing to adopt epoxy glue to seal back curing, remove carbonization or graphitizing process from, reduce power consumption, cost obviously reduces, and accomplishes the sealing of graphite cake inner air vent, reaches the requirement of sealing.
Description of drawings
Fig. 1 is the structural representation of facing of the graphite bipolar plate of fuel battery that adopts manufacture method of the present invention and be made.
Fig. 2 is that the A-A of Fig. 1 is to cutaway view.
Embodiment
The manufacture method of graphite bipolar plate of fuel battery of the present invention is, the high purity graphite piece that at first soaks two roastings with 1 roasting or 1 is raw material, becomes the bipolar plates biscuit according to the specification machine cuts of required graphite bi-polar plate; Then bipolar plates biscuit plain grinding is become the bipolar plates sheet material; The milling cutter for sleeping in that adopts parallel multi-disc wafer saw blade row row to form again processes the through type flow field structure of the parallel distribution of multiple-grooved on the bipolar plates sheet material, form the bipolar plates semi-finished product; At last the bipolar plates semi-finished product are sealed the back with epoxy glue and solidify, promptly become the bipolar plates finished product.
Fig. 1, Fig. 2 are the structural representation of the graphite bipolar plate of fuel battery that adopts manufacture method of the present invention and be made.Shown in the label, 1 is graphite bi-polar plate among the figure, and 2 is the gas flow on the graphite bi-polar plate.
Claims (1)
1. the manufacture method of a graphite bipolar plate of fuel battery is characterized in that, may further comprise the steps:
A, the high purity graphite piece that soaks two roastings with 1 roasting or 1 are raw material, and machine cuts becomes the bipolar plates biscuit;
B, bipolar plates biscuit plain grinding is become the bipolar plates sheet material;
C, the milling cutter for sleeping in that adopts parallel multi-disc wafer saw blade row row to form process the through type flow field structure of the parallel distribution of multiple-grooved on the bipolar plates sheet material, form the bipolar plates semi-finished product;
D, the bipolar plates semi-finished product are sealed the back with epoxy glue solidify, become the bipolar plates finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010217390XA CN102315458A (en) | 2010-07-02 | 2010-07-02 | Production method for graphite bipolar plate of fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010217390XA CN102315458A (en) | 2010-07-02 | 2010-07-02 | Production method for graphite bipolar plate of fuel cell |
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| CN102315458A true CN102315458A (en) | 2012-01-11 |
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| CN201010217390XA Pending CN102315458A (en) | 2010-07-02 | 2010-07-02 | Production method for graphite bipolar plate of fuel cell |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196427A (en) * | 2015-09-25 | 2015-12-30 | 南通国阳新材料有限公司 | Combined milling cutter used for graphite grooving |
| CN108666593A (en) * | 2017-03-28 | 2018-10-16 | 北京亿华通科技股份有限公司 | The production method of fuel battery double plates |
| CN108942425A (en) * | 2018-09-27 | 2018-12-07 | 深圳市南科燃料电池有限公司 | A kind of bipolar plates Special Fixture for Machining and the bipolar plates processing method using the fixture |
| CN109904485A (en) * | 2017-12-07 | 2019-06-18 | 中国科学院大连化学物理研究所 | A kind of encapsulating method of fuel cell water guide bipolar plates |
| CN111129537A (en) * | 2019-12-31 | 2020-05-08 | 一汽解放汽车有限公司 | Composite graphite bipolar plate and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995016287A1 (en) * | 1993-12-10 | 1995-06-15 | Ballard Power Systems Inc. | Embossed fluid flow field plate for electrochemical fuel cells |
| US20020064702A1 (en) * | 1998-12-30 | 2002-05-30 | Gibb Peter R. | Fuel cell fluid flow field plate and methods of making fuel cell flow field plates |
| CN1851966A (en) * | 2006-03-17 | 2006-10-25 | 上海攀业氢能源科技有限公司 | Method batching processing fuel-cell graphite board flow-field |
| CN101483240A (en) * | 2008-03-03 | 2009-07-15 | 上海弘枫石墨制品有限公司 | Ultra-thin graphite bi-polar plate processing method used for fuel cell |
-
2010
- 2010-07-02 CN CN201010217390XA patent/CN102315458A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995016287A1 (en) * | 1993-12-10 | 1995-06-15 | Ballard Power Systems Inc. | Embossed fluid flow field plate for electrochemical fuel cells |
| US20020064702A1 (en) * | 1998-12-30 | 2002-05-30 | Gibb Peter R. | Fuel cell fluid flow field plate and methods of making fuel cell flow field plates |
| CN1851966A (en) * | 2006-03-17 | 2006-10-25 | 上海攀业氢能源科技有限公司 | Method batching processing fuel-cell graphite board flow-field |
| CN101483240A (en) * | 2008-03-03 | 2009-07-15 | 上海弘枫石墨制品有限公司 | Ultra-thin graphite bi-polar plate processing method used for fuel cell |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105196427A (en) * | 2015-09-25 | 2015-12-30 | 南通国阳新材料有限公司 | Combined milling cutter used for graphite grooving |
| CN108666593A (en) * | 2017-03-28 | 2018-10-16 | 北京亿华通科技股份有限公司 | The production method of fuel battery double plates |
| CN109904485A (en) * | 2017-12-07 | 2019-06-18 | 中国科学院大连化学物理研究所 | A kind of encapsulating method of fuel cell water guide bipolar plates |
| CN109904485B (en) * | 2017-12-07 | 2022-01-04 | 中国科学院大连化学物理研究所 | Sealing method of fuel cell water guide bipolar plate |
| CN108942425A (en) * | 2018-09-27 | 2018-12-07 | 深圳市南科燃料电池有限公司 | A kind of bipolar plates Special Fixture for Machining and the bipolar plates processing method using the fixture |
| CN108942425B (en) * | 2018-09-27 | 2023-08-29 | 深圳市南科燃料电池有限公司 | Special fixture for machining bipolar plate and bipolar plate machining method using fixture |
| CN111129537A (en) * | 2019-12-31 | 2020-05-08 | 一汽解放汽车有限公司 | Composite graphite bipolar plate and preparation method and application thereof |
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Application publication date: 20120111 |