Relative humidity profile control strategy for high current density stack operation
US8399142B2 · kind B2 · utility
1Cited by
11References
8Claims
0Family size
Assignee
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Key dates
| Filing date | May 17, 2005 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Oct 15, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control strategy results in a relative humidity profile that is substantially the same or constant regardless of the operational power level of the fuel cell stack. The strategy maintains the relative humidity profile within a range that enables high current density operation of the fuel cell stack. The profile is achieved by adjusting a coolant flow rate through the fuel cell stack to maintain a temperature change across the coolant flow path from inlet to outlet substantially constant regardless of the operational power level of the fuel cell stack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.