Patent ID: 6994267

Claim:
A temperature/humidity control system for a fuel cell stack, comprising: a humidifying device having a vibrator configured to convert water into vapor, a storage member storing the vapor generated by the vibrator, and at least one mixing member configured to humidify hydrogen and air that are supplied to the fuel cell stack with the vapor stored in the storage member; a preheating device configured to preheat the hydrogen and air humidified by the at least one mixing member; at least one temperature sensor detecting temperatures of the hydrogen and the air having passed the preheating device and a temperature of coolant of the fuel cell stack, and outputting corresponding signals; at least one humidity sensor detecting humidities of the hydrogen and the air having passed the humidifying device and outputting corresponding signals; and a fuel cell control unit controlling the humidifying device and the preheating device based on signals from the at least one temperature sensor and the at least one humidity sensor.