CPC H01M 8/04097 (2013.01) [H01M 8/04761 (2013.01); H01M 2250/20 (2013.01)] | 6 Claims |
1. A fuel cell system comprising:
a fuel cell configured to generate electricity by causing reaction of a fuel component contained in fuel gas;
a supply path connected to a supply port of the fuel cell and configured to supply the fuel gas to the supply port;
a control valve that is provided on the supply path and that is able to adjust an opening degree of the control valve;
an ejector provided in a section on the supply path between the control valve and the fuel cell;
a return path connected between an exhaust port of the fuel cell and the ejector and configured to return off-gas discharged from the exhaust port to the supply path by suction force generated by the ejector; and
a controller configured to control the control valve, wherein the controller is configured to:
selectively execute a normal operation in which at least the one control valve is intermittently opened at a duty ratio corresponding to a target value for a supply amount of the fuel gas, and a particular operation for supplying, to the fuel cell, fuel gas containing the fuel component at a higher concentration than in the normal operation;
intermittently open the control valve to a first opening degree when the fuel gas is supplied to the fuel cell at a first supply amount in the normal operation; and
continuously or intermittently open the control valve to a second opening degree smaller than the first opening degree when the fuel gas is supplied to the fuel cell at the first supply amount in the particular operation.
|