Fuel cell system and method therefor

Details Fuel cell system and method therefor Fuel cell system and method therefor

2008-03-07

2011-12-27

Ryan, Patrick (Department: 1726)

Chemistry: electrical current producing apparatus, product, and

Process of cell operation

C429S052000, C429S061000

Reexamination Certificate

active

08084151

ABSTRACT:
When an output voltage of a fuel cell is lowered to carry out a catalyst activation process so as to activate a catalyst during an intermittent operation of the fuel cell, if generated power P1exceeds allowed battery charge power, while generated power P2does not exceed the allowed battery charge power, then low speed corresponding to the generated power P2is selected and the output voltage of the fuel cell is decreased toward a target voltage on the basis of the low speed, which has been selected, thereby restraining sudden generation of surplus power caused by a reduction in the output voltage of the fuel cell. By the control described above, a voltage reduction speed of a fuel cell is determined according to a receiving capability of an object which receives surplus power generated by the fuel cell during the catalyst activation process of the fuel cell.

REFERENCES:
patent: 6399231 (2002-06-01), Donahue et al.
patent: 2004/0219399 (2004-11-01), Zhu et al.
patent: 11-345624 (1999-12-01), None
patent: 2001-85037 (2001-03-01), None
patent: 2002-500421 (2002-01-01), None
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patent: 2003-536232 (2003-12-01), None
patent: 2005-346979 (2005-12-01), None
patent: 2006/046684 (2006-05-01), None
patent: 2006-073545 (2006-07-01), None
patent: WO 2007/063783 (2007-06-01), None
Machine Translation of JP 2005-346979 cited by Applicant in the IDS of May 25, 2011.

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