Low voltage power tap on high voltage stack
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United States of America Patent
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Jul 5, 2011
Grant Date -
Dec 29, 2005
app pub date -
Jun 24, 2004
filing date -
Jun 24, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A fuel cell system that includes a fuel cell stack providing high voltage power. A tap is electrically coupled to the positive end of the stack to provide a positive voltage output terminal of the fuel cell stack, and a tap is electrically coupled to the negative end of the stack to provide a negative output terminal of the fuel cell stack. A low voltage tap is electrically coupled to one or more intermediate bipolar plates of the stack to provide low voltage power. Several intermediate taps can be electrically coupled to the bipolar plates, where a center intermediate tap is designated a reference potential tap. A switching network switches the several voltage potentials to provide an AC signal.
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