System and method of operation of a fuel cell system and of ceasing the same for inhibiting corrosion
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United States of America Patent
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Issued Date -
Aug 7, 2008
app pub date -
Feb 6, 2007
filing date -
Feb 6, 2007
priority date (Note) -
Abandoned
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Abstract
A fuel cell stack is provided having a plurality of fuel cells, each including a membrane electrode assembly interposed between anode and cathode flow field plates that form anode and cathode channels, respectively. An accumulating device is positioned downstream of the fuel cell stack. A purge control device is positioned downstream of the accumulating device operable in a first state to allow fluid communication between the anode and cathode channels, and in a second state to isolate an oxidant outlet from the accumulating device. Some embodiments include a purge control device between the anode channels and the accumulating device. A method of operation of the fuel cell stack includes selectively purging fluids from the fuel cell stack into the accumulating device at a first time and selectively purging fluids from the accumulating device at a second time, subsequent to the first time.
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