| 摘要 |
Provided is a fuel cell system capable of activating a fuel cell even under low-temperature environments. The fuel cell system detects an outside air temperature in the vicinity of the fuel cell to, after the fuel cell enters a deactivated state, estimate a transition of outside air temperature on the basis of a variation of the detected outside air temperature, and makes a decision as to whether or not the estimated outside air temperature falls below a predetermined freezing temperature at which moisture freezes. When a decision is made that the estimated outside air temperature falls below the predetermined freezing temperature, freezing prevention processing is conducted to prevent moisture from freezing in the interior of the fuel cell. The estimation of the outside air temperature transition is made by time-differentiating a variation of outside air temperature.
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