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Title:
METHODS OF OPERATING FUEL CELLS HAVING CLOSED REACTANT SUPPLY SYSTEMS
Document Type and Number:
WIPO Patent Application WO2004079845
Kind Code:
A3
Abstract:
A fuel cell system is operated with the fuel supply pressure greater than the oxidant supply pressure to the fuel cell. This gives improved performance particularly when the fuel cell system is closed an the fuel side. The magnitude of fuel overpressure may be varied in accordance with variations in the fuel cell operating parameters.

Inventors:
SUMMERS DAVID (CA)
HAAS HERWIG R (CA)
Application Number:
PCT/CA2004/000334
Publication Date:
May 19, 2005
Filing Date:
March 05, 2004
Export Citation:
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Assignee:
BALLARD POWER SYSTEMS (CA)
SUMMERS DAVID (CA)
HAAS HERWIG R (CA)
International Classes:
H01M8/04; H01M8/10; H01M8/24; (IPC1-7): H01M8/04
Foreign References:
US6117577A2000-09-12
US6451470B12002-09-17
US6479177B12002-11-12
US5366818A1994-11-22
US5879826A1999-03-09
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