| 摘要 |
A fuel cell system is capable of easily determining whether or not supply of gas to a cathode has been cut off after an issuance of a power generation stop command. The fuel cell system includes a cell stack which includes a plurality of fuel cells; a stop valve which is brought to a closed state as the power generation stop command is issued, thereby cutting off an inflow of air into a pipe, and therefore into the cell stack; a power generation sensor which detects a voltage of the cell stack after the issuance of the power generation stop command; and a CPU which controls an operation of the fuel cell system. When a main switch is turned off while the cell stack is in a power generating operation, an operation stop command and the power generation stop command are given to the CPU. After the power generation stop command is issued, the CPU determines whether or not air supply to the cell stack has been cut off, by comparing the voltage of the cell stack to a first threshold value.
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