FUEL CELL SYSTEM AND METHOD OF STARTING A FUEL CELL SYSTEM
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United States of America Patent
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Issued Date -
Feb 18, 2010
app pub date -
Aug 1, 2007
filing date -
Sep 15, 2006
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method of starting up a fuel cell system comprising a reformer (10) and a fuel cell stack (12), the reformer receiving during a first start-up phase a supply of oxygen and fuel with a first air ratio .lamda..sub.i characterizing the fuel/air ratio, the reformer receiving during a second start-up phase a supply of oxygen and fuel with a second air ratio .lamda..sub.2 characterizing the fuel/air ratio, the first fuel/air ratio .lamda..sub.1 being larger than the second air ratio .lamda..sub.2 (.lamda..sub.1>.lamda..sub.2) and the fuel cell stack receiving a supply of reformate (18) generated in the reformer during the first and the second start-up phase. In accordance with the invention it is provided for that the transition from the first start-up phase to the second start-up phase is monitored by sensing a voltage furnished by the fuel cell stack (12). The invention relates furthermore to a fuel cell system.
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