OPERATION CONTROL METHOD FOR FUEL CELL

摘要

PROBLEM TO BE SOLVED: To prevent a gas diffusion property from being reduced at the time of fuel cell startup under a low temperature environment.SOLUTION: An operation control method for a fuel cell includes the steps of: acquiring a startup time temperature of the fuel cell; acquiring a present temperature of the fuel cell; setting a present target operation point of the fuel cell that is identified from an output voltage value and an output current value of the fuel cell, based on the startup time temperature or based on the startup time temperature and the present temperature; and controlling at least one of a flow rate of a reaction gas and an output voltage of the fuel cell in such a manner that an operation point of the fuel cell becomes the target operation point. The step of setting the target operation point includes setting an operation point of the output voltage value that is lower when the startup time temperature is low than that when the startup time temperature is high, as the target operation point if the present temperature is the same.SELECTED DRAWING: Figure 4