Cell maintenance device for fuel cell stacks
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United States of America Patent
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Jan 6, 2009
Grant Date -
Jun 23, 2005
app pub date -
Dec 19, 2003
filing date -
Dec 19, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for maintaining the cells of a fuel cell stack are disclosed. The apparatus includes a fuel cell maintenance device including means for imposing a low impedance across at least one cell of a fuel cell stack, e.g., a switch, and a pulse generator. The pulse generator is capable of pulsing a cathode of the at least one cell of through the low impedance imposing means, e.g., when the switch is closed. The method transparently maintains the cells of a fuel cell stack, and includes sequentially pulsing the cathodes of a plurality of cells in a fuel cell stack, and maintaining a consistent number of the cells providing power to a load of the fuel cell stack while sequentially pulsing the cathodes of the cell.
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