Procedures for shutting down fuel cell system by using air...

Details Procedures for shutting down fuel cell system by using air... Procedures for shutting down fuel cell system by using air...

2007-09-18

2007-09-18

Maples, John S. (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000

Reexamination Certificate

active

10920838

ABSTRACT:
A fuel cell system that employs a procedure for delaying an air purge of a fuel cell stack at system shut-down until the temperature of the stack is reduced below a predetermined temperature. The fuel cell stack includes an anode side, a cathode side, an anode input, a cathode input and an anode exhaust. The system includes a temperature sensor for monitoring the temperature of a cooling fluid flowing through the stack. The anode side of the fuel cell stack is purged at the stack shut-down by directing air from the cathode input line to the anode input line after the temperature of the cooling fluid is reduced to a predetermined temperature.

REFERENCES:
patent: 6379827 (2002-04-01), Cipollini
patent: 6399231 (2002-06-01), Donahue et al.
patent: 6479177 (2002-11-01), Roberts et al.
patent: 6743537 (2004-06-01), Shimazu
patent: 2002/0076583 (2002-06-01), Reiser et al.
patent: 2002/0102443 (2002-08-01), Yang et al.
patent: 2004/0033395 (2004-02-01), Thompson

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