Fuel cell system

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

C429S428000, C429S443000, C429S454000

Reexamination Certificate

active

07993786

ABSTRACT:
The disclosure describes fuel cell systems including a fuel cell stack that generates electricity, an exhaust valve that externally vents a fuel gas from a fuel chamber of the fuel cell stack, and a controller that computes an estimated time to replace an oxidant gas in at least the fuel chamber with a newly supplied fuel gas, wherein at a time of starting-up the fuel cell system the controller maintains the exhaust valve in an open position for the estimated time. In some embodiments, the controller computes the estimated time as a summation of a first time T1measured from the fuel cell start-up time to a time when contents of a supply conduit are replaced with fuel gas, a second time T2measured from the time when contents of a supply conduit are replaced with fuel gas to a time when contents of the fuel chamber are replaced with fuel gas, and a third time T3measured from the time when contents of the fuel chamber are replaced with fuel gas to a time when contents of the exhaust conduit are replaced with fuel gas. The disclosure further describes methods of operating a fuel cell system, particularly during fuel cell start-up.

REFERENCES:
patent: 2001/0014415 (2001-08-01), Iio
patent: 2002/0076583 (2002-06-01), Reiser et al.
patent: 2004/0067399 (2004-04-01), Kobayashi
patent: 2004/0229088 (2004-11-01), Hayashi et al.
patent: 55-154075 (1980-01-01), None
patent: 07-240220 (1995-09-01), None
patent: 08-222259 (1996-08-01), None
patent: 2002-231294 (2002-08-01), None
patent: 2002-237322 (2002-08-01), None
patent: 2003-178782 (2003-06-01), None
patent: 2003-317766 (2003-11-01), None
patent: 2004-139984 (2004-05-01), None
patent: 2004-193107 (2004-07-01), None
patent: 2004-296351 (2004-10-01), None
patent: WO 03/096460 (2003-11-01), None

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