| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cell system which can properly reduce retained water in a fuel cell and a control method therefor.SOLUTION: During warming-up of a fuel cell 10, the amount of retained water in the fuel cell 10 is estimated based on the temperature detected by a temperature sensor 36 and/or the integrated current value calculated by an ECU 60. After the warming-up of the fuel cell 10 is finished, the amount of retained water in the fuel cell 10 is estimated based on the impedance detected by an impedance meter 54. When the amount of retained water is equal to or greater than a designated value, at least one of first control for raising the flow rate of cathode gas circulating in an intercooler bypass passage, second control for raising the flow rate of cathode gas circulating in a humidifier bypass passage, third control for raising the temperature of the fuel cell 10, and fourth control for raising the flow rate of cathode gas supplied to a cathode gas supply passage is executed. |
