Robust heating of fuel cells during subfreezing start

Details Robust heating of fuel cells during subfreezing start Robust heating of fuel cells during subfreezing start

2011-07-12

2011-07-12

Crepeau, Jonathan (Department: 1725)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

Process or means for control of operation

C429S429000, C429S444000

Reexamination Certificate

active

07976997

ABSTRACT:
The electrical output connections (155, 158) of a fuel cell stack (151) are short circuited (200; 211, 212) during start up from freezing temperatures. Before the stack is short circuited, fuel is provided in excess of stoichiometric amount for a limiting stack current, and oxidant is provided to assure stoichiometric amount for the limiting stack current.

REFERENCES:
patent: 2003/0207162 (2003-11-01), Reiser
patent: 2005/0277003 (2005-12-01), Dewey
“Rapid self-start of polymer electrolyte fuel cell stacks from subfreezing temperatures”, Ahluwalia, et al., Journal of Power Scources 162 (Aug. 9, 2006), 502-512.

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