Control method for fuel cell system

Abstract

A control method for a fuel cell system including: an oxidation rate acquisition step of acquiring oxidation rate θ1 on electrode catalyst of unit cell in the fuel cell; poisoning rate acquisition step of acquiring a poisoning rate θ2 of electrode catalyst of unit cell in fuel cell; a normal operation step of performing a normal operation at a potential within a predetermined range; a low potential operation step of performing a low potential operation for removing an oxide at a potential lower than a lower limit of a potential range of normal operation when oxidation rate θ1 on electrode catalyst exceeds a specified value ai; and a high potential operation step of performing a high potential operation for removing poisoning at a potential exceeding an upper limit of the potential range of the normal operation when the poisoning rate θ2 of the electrode catalyst exceeds a specified value α2.

Dependencies are inferred from the claim text.