Patent ID: 7575825

Claim:
A control method of a power supply system in which a fuel cell and a battery are connected in parallel by a power supply wiring, comprising the steps of: activating the fuel cell, which has stopped generating electric power, in response to a request to apply a load which is larger than zero to the fuel cell; obtaining a load requirement that indicates electric power that is required by the power supply system; measuring a time which has elapsed since the fuel cell was activated; obtaining information regarding an amount of fuel actually supplied to the fuel cell; comparing the elapsed time with a predetermined reference time; setting a target electric power which needs to be output from the fuel cell based on the obtained load requirement without considering the obtained information regarding the amount of the fuel actually supplied to the fuel cell when it is determined that the elapsed time is equal to or shorter than the reference time; and setting the target electric power which needs to be output from the fuel cell in accordance with the obtained information regarding the amount of the fuel actually supplied to the fuel cell when it is determined that the elapsed time exceeds the reference time.