Fuel-cell system and method of controlling fuel cell

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

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Details

C429S430000, C429S443000

Reexamination Certificate

active

08039155

ABSTRACT:
A fuel-cell system is provided, which includes a fuel cell, a reactive-gas supply unit and a control unit. The reactive-gas supply unit supplies the reactive gases to the fuel cell. The control unit includes an average stoichiometric flow-ratio calculation part and a reactive-gas reduction part. The average stoichiometric flow-ratio calculation part calculates an average stoichiometric flow ratio by averaging stoichiometric flow ratios. A stoichiometric flow ratio is a ratio of an amount of the reactive gases supplied to the fuel cell with respect to a required amount of the reactive gases of the fuel cell in accordance with a required amount of power generation. When the average stoichiometric flow ratio is equal to or greater than a first predetermined value, the reactive-gas reduction part reduces the amount of the reactive gases supplied to the fuel cell so as to lower the stoichiometric flow ratio.

REFERENCES:
patent: 2003/0049503 (2003-03-01), Ballantine et al.
patent: 2002-50377 (2002-02-01), None
patent: 2003-282115 (2003-10-01), None
patent: 2004-207029 (2004-07-01), None
patent: 2004-273162 (2004-09-01), None
patent: 2004-288496 (2004-10-01), None
patent: 2005-093218 (2005-04-01), None
IPDL PAJ JPO machine translation for JP 2004-273162, Takashi, Ino, May 3, 2003.
Japanese Office Action for Application No. 2005-331611, dated Mar. 16, 2010.

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