Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Process or means for control of operation
Reexamination Certificate
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
Akiyama Takashi
Ichinose Toshihiko
Takada Masahiro
Ueda Hideyuki
Apicella Karie O'Neill
Dickinson Wright PLLC
Panasonic Corporation
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