Storage of fuel cell energy during startup and shutdown

Details Storage of fuel cell energy during startup and shutdown Storage of fuel cell energy during startup and shutdown

2006-01-31

2006-01-31

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000

Reexamination Certificate

active

06991864

ABSTRACT:
During startup or shutdown of a fuel cell power plant, the electric energy generated by consumption of reactants is extracted by a storage control (200) in response to a controller (185) as current applied to an energy storage system201(a battery). In a boost embodiment, an inductor (205) and a diode (209) connect one terminal (156) of the stack (151) of the battery. An electronic switch connects the juncture of the inductor and the diode to both the other terminal (155) of the stack and the battery. The switch is alternately gated on and off by a signal (212) from a controller (185) until sufficient energy is transferred from the stack to the battery. In a buck environment, the switch and the inductor (205) connect one terminal (156) of the stack to the battery. A diode connects the juncture of the switch with the inductor to the other terminal (155) of the fuel cell stack and the battery.

REFERENCES:
patent: 6572993 (2003-06-01), Singh et al.
patent: 2003/0091882 (2003-05-01), Schmidt et al.
patent: 2004/0219399 (2004-11-01), Zhu et al.
patent: 2005/0106432 (2005-05-01), Converse

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