To improve the service durability of a cooling water circulation passage.
Disclosed is a fuel cell system for generating electric power by supplying an anode gas and a cathode gas to a fuel cell, the system comprising: a coolant circulation passage in which a coolant for cooling the fuel cell circulates; a circulation pump provided in the coolant circulation passage for circulating the coolant; a reservoir tank for reserving the coolant therein, the inside pressure thereof maintained at atmospheric pressure; an on-off valve provided in the coolant circulation passage on the intake side of the circulation pump, the on-off valve opening to supply the coolant inside the reservoir tank into the coolant circulation passage when the pressure inside the coolant circulation passage becoming less than a predetermined negative pressure; a communication passage for connecting the reservoir tank to the on-off valve; circulation pump control means (S5) for gradually increasing rotational speed of the circulation pump when starting a circulation of the coolant by driving the circulation pump.
NISHIMURA HIDETAKA
| JP2004342345A | 2004-12-02 | |||
| JP2009259467A | 2009-11-05 | |||
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| JPH0613093A | 1994-01-21 |
Yasunari Mita
Masaaki Iida
Ryohei Kamiki