Fuel cell system and shutoff method
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United States of America Patent
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Nov 1, 2011
Grant Date -
Apr 19, 2007
app pub date -
Oct 13, 2006
filing date -
Oct 17, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A fuel cell system includes a fuel cell, an operation controller, a checking unit, a scavenging unit, an instructing unit, a temperature sensor, a humidifier and a humidification controller. The operation controller selects one of a normal operation mode and a low-temperature operation mode. The checking unit determines whether the fuel cell has been started up in the low-temperature operation mode. The instructing unit provides an instruction for a shutoff of electricity generation. When the scavenging unit conducts scavenging based on the checking unit determining that the fuel cell has been started in the low-temperature operation mode in response to an instruction for a shutoff of electricity generation and an actual temperature of the fuel cell is higher than a predetermined temperature, the humidification controller controls an amount of humidification according to the actual temperature.
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