Method for modifying surface of metal bipolar plate and bipolar plate for fuel cell
US9515325B2 · kind B2 · utility
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2References
14Claims
0Family size
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Key dates
| Filing date | Aug 12, 2013 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Aug 19, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for modifying the surface of a metal bipolar plate is provided. The method includes the steps of providing a metal substrate having a conducting adhesion layer on a surface thereof, the metal substrate having a flow field structure at the surface thereof; applying expanded graphite powder onto the conducting adhesion layer; and press-fitting the expanded graphite powder and the metal substrate with a mold structurally corresponding to the flow field structure, to form a graphite layer covering the surface the metal substrate from the expanded graphite powder. A bipolar plate for a fuel cell is further provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.