Method for shutting down a fuel cell system using an air purge

Details Method for shutting down a fuel cell system using an air purge Method for shutting down a fuel cell system using an air purge

2007-08-09

2009-10-27

Maples, John S (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

C429S006000, C429S006000

Reexamination Certificate

active

07608352

ABSTRACT:
A method 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. A temperature sensor monitors 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 the predetermined temperature.

REFERENCES:
patent: 6093500 (2000-07-01), Margiott et al.
patent: 6124054 (2000-09-01), Gorman et al.
patent: 2002/0076583 (2002-06-01), Reiser et al.

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