Separator of fuel cell and method for producing same
US6410178B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | May 5, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
For use in a fuel cell, constituted by plural cells, a separator that can reduce fluctuations in electromotive force across respective cells. An electrically conductive member 3, as a separator, and a processing electrode 16, having patterned electrode projections 20, are immersed in an electrolytic solution facing each other. Current is fed between member 3 and electrode 16 for electrolytic processing to dissolve the portion of the member 3 facing projections 20, thus forming a gas path 30 having a surface roughness Rz on this bottom surface 30e not larger than 1 &mgr;m. Using the separator having the gas path with extremely smooth bottom surface, the gas flow in each cell proceeds in a reduced fluctuation to reduce fluctuations in the electromotive force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.