CN101630748B - Preparation device of flexible graphite water flow field - Google Patents
Preparation device of flexible graphite water flow field Download PDFInfo
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- CN101630748B CN101630748B CN2009101837845A CN200910183784A CN101630748B CN 101630748 B CN101630748 B CN 101630748B CN 2009101837845 A CN2009101837845 A CN 2009101837845A CN 200910183784 A CN200910183784 A CN 200910183784A CN 101630748 B CN101630748 B CN 101630748B
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- flow field
- water flow
- flexible graphite
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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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- 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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Abstract
The invention relates to a preparation device of a flexible graphite water flow field used for a proton exchange membrane fuel cell. The preparation device is characterized in that a stamping mode is adopted for manufacturing, a stamping cutter edge die is designed on a stamping die according to a flow field pattern, and an elastic material plate which is on the same horizontal plane with a cutter edge or slightly higher than the cutter edge is arranged on the plane of the cutter edge die; and a hard non-metal material bottom plate is arranged on a stamping stop die. The preparation device thoroughly changes the defects of low production efficiency, weak repeatability and unsmooth edge of manual sculpture in the preparation of the flexible graphite water flow field, can greatly improve the preparation efficiency of the flexible graphite water flow field, improve the production efficiency by more than 15 times compared with the original manual production at least, be easier to produce in batch, have good stamping consistency for the flow field and smooth edge of the punching flow field, achieve hundred-percent repetition and improve the water flow capacity.
Description
Technical field
The present invention relates to a kind of used in proton exchange membrane fuel cell preparation device of flexible graphite water flow field, especially a kind of production efficiency water flow field flow resistance high, preparation is little, the preparation device of flexible graphite water flow field of good reproducibility.
Background technology
Bipolar plates is the important component part of Proton Exchange Membrane Fuel Cells, plays supported fuel cell, and the effect of reaction gas, oxidant and coolant channel is provided.With regard to the service condition of bipolar plates own, require it not only to have high conductance, corrosion resistance, low-density, high mechanical strength and gasproof body permeability, and the cost of material is low, be prone to processing, good characteristics such as dimensional stability.At present, the dual polar plates of proton exchange membrane fuel cell material has, graphite bi-polar plate, metal double polar plates, metallic compound bipolar plates and two kinds of different materials composite dual-electrode plates.Through preparing hydrogen, oxygen unipolar plate and water flow field respectively, combining through welding or bonding method then becomes bipolar plates.
The disclosed metal double polar plates of Chinese patent CN1416184A, its water flow field adopts metallic plate, and metallic plate is as water flow field, and corrosion resistance is relatively poor relatively, and resistance to corrosion is lower than graphite.Therefore from the corrosion resistance angle, the more employing graphite of water flow field is made.
Graphite material has hard graphite and flexible graphite, and is comparatively desirable with flexible graphite water flow field especially in the combination bipolar plates, has stronger corrosion resistance.But flexible graphite is difficult to prepare water flow field through common process for stamping because of himself proterties, and prior art adopts the template hand engraving usually; Poor repeatability not only influence the uniformity of pile, and flow field patterns is complicated; Engraving is made trouble; Work efficiency is low, and processing cost is high, has restricted the mass production of composite dual-electrode plates.Secondly, edge, hand engraving flow field is rough, and flow resistance is big, also can influence cooling effect.
Though prior art has the computer carving of employing method to prepare the flow field, Chinese patent CN101136479 openly adopts the computer carving aluminium alloy to prepare bipolar plates.Yet because the flexible graphite quality is softer relatively, and has certain viscosity, engraving process is actual can not use.Though prior art also has process for stamping to prepare shaped grooves, only be applicable to rigidity or hard material usually, for example metal, plastics; Because flexible graphite is the soft body (quality is softer relatively, and certain viscosity is arranged) by expanded graphite and resin compacting, process for stamping usually; Be prone to produce burr and overlap, and the water flow field runner is narrow and small relatively, the hollow out ratio is big; Account for entire area more than 50%; Therefore and runner is intensive, ends when of the present invention, never has the actual employing of people process for stamping to prepare flexible graphite water flow field.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art, provides a kind of preparation production efficiency high, good reproducibility, and cost is low, the entire preparation device of flexible graphite water flow field in flow field.
The object of the invention realizes; Main design makes it to be fit to the flexible graphite water flow field punching molding is improved through repetition test through improving diel; The one, designing die-cut knife edge due by flow field patterns, the knife edge due plane has and flushes with the edge of a knife or a little more than the elastic material board of the edge of a knife; The 2nd, the punching press base plate adopts the hard elastic material plate.Elastic material board on punching course knife edge due plane like this can the effectively smooth flexible graphite plate that compresses punching out, prevents that the graphite cake out-of-flatness warps when die-cut to cause the runner otch rough; Its elasticity that has and soft of while; The edge of a knife in die-cut flow field is passed, flexible graphite is carried out die-cut, and when knife edge due is lifted in die-cut completion; The jacking force that its elastic return produces can be separated the runner of going out with knife edge due; Bed die adopts hard non-metallic material, can protect the mould blade, limits the excessive incision of the edge of a knife simultaneously, effectively avoids the generation of overlap.Both cooperations efficiently solve the difficult problem that common impact style can not directly apply to the flexible graphite water flow field punching out, have realized the object of the invention.Specifically, preparation device of flexible graphite water flow field of the present invention comprises the punching mechanism of relative operation it is characterized in that the die-cut knife edge due by the flow field graphic designs is arranged on the stamping die, and the knife edge due plane has and flushes with the edge of a knife or a little more than the elastic material board of the edge of a knife; On the punching press retaining mould hard non-metallic material base plate is arranged.
The present invention is said
Elastic material board on the knife edge due plane, its effect is as above said, and the one, when punching press, be used for the smooth flexible graphite paper that compresses; Make it in die-cut process, keep smooth; Reducing warps causes notching edge to produce burr, makes die-cut runner smooth, thereby reduces flow passage resistance force of waterproof; The 2nd, the elasticity that it has and soft can make the edge of a knife in die-cut flow field pass, and carries out die-cut to flexible graphite; The 3rd, the jacking force that elastic return produces can be separated the runner of going out with knife edge due.According to above-mentioned functions; Has compression and restorative good elastomeric material all can be used; Such as but not limited to fine and close foamed plastic (for example expanded polystyrene (EPS), EVA, PE foaming plate, foamed silastic plate), rubber slab, soft plastic, fine and close cavernous body etc.
The hard non-metallic material base plate, its effect is also as above said, and the one, protection mould blade, the 2nd, the generation of overlap is effectively avoided in the excessive incision of the restriction edge of a knife.According to above-mentioned functions, the hard non-metallic material plate all can be employed, such as but not limited to the polyformaldehyde plate, and plank, ebonite board, hard plastic board.Their existing certain degree of hardness can satisfy die-cut needs, have again simultaneously certain soft relatively, the protection punching tool.
Diel blade figure is identical with flow field patterns.
Die-cut blade, a kind of better triangular in shape, help reducing punching press and produce burr.
Die-cut pressure, test confirms to be preferably 2～5Mpa, and pressure is crossed conference and is caused the damage to base plate, and the too small cut-out flexible graphite that then is difficult for of pressure can cause the runner edge burr to occur.
Blanking units can adopt the vertical or horizontal punching machine of prior art.
Preparation device of flexible graphite water flow field of the present invention with respect to prior art, improves blanking units owing to adopt; Make the flexible graphite water flow field preparation thoroughly to have changed the low production efficiency of hand engraving, the rough defective of poor repeatability and edge, can improve the flexible graphite water flow field preparation efficiency greatly; The more former craft of production efficiency can improve more than 15 times at least; Being easier to the batch process of water flow field, and die-cut flow field high conformity, can reach near hundred-percent repetition; And edge, die-cut flow field is smooth, has improved discharge.
Below in conjunction with a specific embodiment, the present invention is further understood in exemplary illustration and help, but the embodiment detail only is for the present invention is described; Do not represent the present invention to conceive whole technical schemes down; Therefore should not be construed as the technical scheme qualification total to the present invention, some are In the view of the technical staff, and the unsubstantiality that does not depart from the present invention's design increases and/or change; For example simple the change or replacement of technical characterictic to have same or similar technique effect all belongs to protection range of the present invention.
Description of drawings
Accompanying drawing is the die-cut edge of a knife mould structure of a present invention sketch map.
Embodiment
Embodiment: at the patrix of vertical stamping machine, be fixed with by the water flow field shape and make edge of a knife mould (accompanying drawing), there is the fine and close cavernous body a little more than the edge of a knife on the knife edge due plane, is fixed with the polyformaldehyde base plate on the counterdie, and flexible graphite paper is positioned on the base plate.Regulating die-cut pressure is 3Mpa, starts press and carries out punching press, promptly gets required flexible graphite water flow field.Die-cut a slice time only needs 0.5min, and hand engraving needs 7～10min approximately according to the skilled operation degree.Die-cut water flow field and hand engraving, discharge increases by 40%.
To those skilled in the art, under this patent design and specific embodiment enlightenment, some distortion that can directly derive or associate from this patent disclosure and general knowledge; Those of ordinary skills will recognize also can adopt additive method, or uses substituting of known technology in the prior art always, and the mutual various combination between characteristic; For example the knife edge due shape changes according to flow field patterns, the change of upper and lower mould elastomeric material, or the like unsubstantiality change; Can be employed equally; Can both realize and basic identical function of the foregoing description and effect, launch for example no longer one by one to describe in detail, all belong to this patent protection range.
Claims (5)
1. preparation device of flexible graphite water flow field comprises the punching mechanism of relative operation it is characterized in that the die-cut knife edge due by the flow field graphic designs is arranged on the stamping die, and the knife edge due plane has and flushes with the edge of a knife or a little more than the elastic material board of the edge of a knife; On the punching press retaining mould hard non-metallic material base plate is arranged.
2. according to the said preparation device of flexible graphite water flow field of claim 1, it is characterized in that die-cut knife edge due is arranged on the mobile mould.
3. according to claim 1 or 2 said preparation device of flexible graphite water flow field, it is characterized in that die-cut pressure is 2～5Mpa.
4. according to claim 1 or 2 said preparation device of flexible graphite water flow field, it is characterized in that the elastic material board on the knife edge due is fine and close foamed plastic, rubber slab, soft plastic, a kind of in the fine and close cavernous body.
5. according to claim 1 or 2 said preparation device of flexible graphite water flow field, it is characterized in that the hard non-metallic material base plate is the polyformaldehyde plate, a kind of in plank, ebonite board, the hard plastic board.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101837845A CN101630748B (en) | 2009-08-09 | 2009-08-09 | Preparation device of flexible graphite water flow field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101837845A CN101630748B (en) | 2009-08-09 | 2009-08-09 | Preparation device of flexible graphite water flow field |
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| CN101630748A CN101630748A (en) | 2010-01-20 |
| CN101630748B true CN101630748B (en) | 2012-01-25 |
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| CN2009101837845A Active CN101630748B (en) | 2009-08-09 | 2009-08-09 | Preparation device of flexible graphite water flow field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093758A (en) * | 2018-08-01 | 2018-12-28 | 苏州安洁科技股份有限公司 | A kind of pad knife technique of roller knife |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10103390B2 (en) * | 2015-04-20 | 2018-10-16 | Energyor Technologies Inc | Method for producing kiss cut fluid flow field plates |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158767A (en) * | 1996-11-01 | 1997-09-10 | 昆明贵金属研究所 | Manufacture of zinc-based alloy die |
| CN2552171Y (en) * | 2002-06-07 | 2003-05-21 | 中国科学院上海微系统与信息技术研究所 | Double polar plate structure for proton exchange membrane fuel cell |
| CN200993983Y (en) * | 2005-08-04 | 2007-12-19 | 王善理 | Fuel cell strap flow field modified metal electrode |
| CN201498552U (en) * | 2009-08-09 | 2010-06-02 | 江苏新源动力有限公司 | Device of preparing flexible graphite water flow field |
-
2009
- 2009-08-09 CN CN2009101837845A patent/CN101630748B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158767A (en) * | 1996-11-01 | 1997-09-10 | 昆明贵金属研究所 | Manufacture of zinc-based alloy die |
| CN2552171Y (en) * | 2002-06-07 | 2003-05-21 | 中国科学院上海微系统与信息技术研究所 | Double polar plate structure for proton exchange membrane fuel cell |
| CN200993983Y (en) * | 2005-08-04 | 2007-12-19 | 王善理 | Fuel cell strap flow field modified metal electrode |
| CN201498552U (en) * | 2009-08-09 | 2010-06-02 | 江苏新源动力有限公司 | Device of preparing flexible graphite water flow field |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109093758A (en) * | 2018-08-01 | 2018-12-28 | 苏州安洁科技股份有限公司 | A kind of pad knife technique of roller knife |
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| CN101630748A (en) | 2010-01-20 |
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