Fuel cell anomaly detection method and apparatus
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United States of America Patent
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Oct 11, 2005
Grant Date -
Jan 30, 2003
app pub date -
Jul 25, 2001
filing date -
Jul 25, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A respective bipolar junction transistor is coupled across pairs of fuel cells in a fuel cell stack to monitor the voltage across each fuel cell pairs for a drop in voltage below a threshold voltage. A respective optoisolator coupled to each of the transistors produces a digital signal corresponding to the status of the respective pair of fuel cells. An 'AND' circuit produces a single digital signal corresponding to the status of one or more pairs of fuel cells.
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