| 摘要 |
PROBLEM TO BE SOLVED: To determine a film wet condition of a fuel cell in real time.SOLUTION: Air humidity at an inlet of a humidifier is calculated on the basis of atmospheric pressure, intake air temperature of an air pump 2, and air temperature at an inlet of the humidifier 4; air humidity at an outlet of a cathode is calculated on the basis of air temperature at the outlet of the cathode of a fuel cell stack 1 and refrigerant temperature at a refrigerant outlet of the fuel cell stack 1; temporary cathode humidity of the fuel cell stack 1 is calculated by referring to a map on the basis of air temperature at the inlet of the humidifier and air humidity at the outlet of the cathode; a load applied in a laminated direction of a unit fuel cell in the fuel cell stack 1 is detected by a load sensor 35; a correction coefficient is calculated on the basis of compared values between the detected load and a reference value of the load; and humidity of the cathode is calculated by multiplying the temporary cathode humidity by the correction coefficient. |
