Control strategy to prevent humidity cycling in a fuel cell

Details Control strategy to prevent humidity cycling in a fuel cell Control strategy to prevent humidity cycling in a fuel cell

2006-08-24

2010-11-09

Crepeau, Jonathan (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

Process or means for control of operation

C429S428000, C429S431000, C429S432000, C320S101000, C320S137000

Reexamination Certificate

active

07829228

ABSTRACT:
A system and method for reducing RH cycling of the membranes in a fuel cell stack. A control algorithm damps a power request signal using a first order filter during low power transients so that the fuel cell stack continues generating power at a higher rate than is requested. The excess power generated by the stack is used to recharge a battery in the fuel cell system. The damped power signal is weighted so that more fuel cell stack power is provided for a low battery state of charge unless stack power is provided for a high battery state of charge.

REFERENCES:
patent: 2003/0091882 (2003-05-01), Schmidt et al.
patent: 2007/0141412 (2007-06-01), Becker et al.
patent: 2007/0284166 (2007-12-01), Maier et al.
patent: 10 2007 038172 (2008-03-01), None

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