Fuel cell system and method of operating a fuel cell system
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United States of America Patent
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May 8, 2012
Grant Date -
Oct 7, 2010
app pub date -
Nov 7, 2008
filing date -
Nov 16, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
In a fuel cell system a specific connection and a valve arrangement make it possible for a compressor to supply precompressed air to a fuel cell stack via a waste gas line, said air then leaving the fuel cell stack via a line which is otherwise an air feed line. In this way, a humidifier may be bypassed. This is sensible in particular during a start phase at low ambient temperatures, during which the fuel cell system is intended to warm up without moisture in the fuel cell stack having a negative effect, for instance by freezing. The compressor may be operated both in the start phase or stop phase and during conventional operation by the same mode of operation.
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