Method for operating fuel cell system

Details Method for operating fuel cell system Method for operating fuel cell system

2011-06-28

2011-06-28

Apicella, Karie O'Neill (Department: 1726)

Chemistry: electrical current producing apparatus, product, and

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

Process or means for control of operation

C429S400000

Reexamination Certificate

active

07968238

ABSTRACT:
A method for operating a fuel cell system including a fuel cell stack composed of a plurality of cells connected in series. The method includes the steps of: (a) supplying a fuel and an oxidant to anodes and cathodes of the cells, respectively, depending on a load to generate power at a constant voltage under constant voltage control; (b) temporarily suspending the supply of the oxidant with the fuel being supplied; and (c) lowering the constant voltage to a predetermined voltage simultaneously with or immediately before the suspension of the supply of the oxidant. According to this operation method, when the supply of the oxidant is suspended, a platinum catalyst in the cathodes can be reduced and reactivated in all the cells.

REFERENCES:
patent: 4532192 (1985-07-01), Baker et al.
patent: 2006/0188765 (2006-08-01), Matsuzaki et al.
patent: 63026961 (1988-02-01), None
patent: 63026961 (1988-02-01), None

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