| 摘要 |
PROBLEM TO BE SOLVED: To restore the water content of an electrolyte film if it has decreased, without causing a substantial decrease in the output of a fuel cell system. SOLUTION: A control device 11 for controlling the fuel cell system estimates the wet condition of the electrolyte film on the basis of, for example, a voltage- current characteristic during operation of a fuel cell; if the wet condition is estimated to be insufficient, cooling water temperature is lowered to lower the operating temperature of the fuel cell so as to raise relative humidity inside a stack and thus accelerate the wetting of the electrolyte film. |
