FUEL CELL SYSTEM AND ITS OPERATING METHOD

摘要

An object is to suppress the dryness at an anode inlet of a fuel cell stack in a case of power generation at a current density of not lower than 1.4 A/cm2 in the fuel cell stack in which a mass of a platinum catalyst per 1 cm2 included in a cathode electrode is not higher than 0.2 mg. This object is achievable by performing at least one of controls of controlling temperature of the fuel cell stack to be not lower than 30° C. and not higher than 65° C., controlling a stoichiometric ratio of a cathode gas to be not lower than 1.0 and not higher than 1.5, controlling an outlet pressure of an anode gas to be not lower than 100 kPa and not higher than 250 kPa and controlling a stoichiometric ratio of the anode gas to be not lower than 1.25 and not higher than 5.

主权项

1. A fuel cell system, in which a mass of a platinum catalyst per 1 cm2 included in a cathode electrode is not higher than 0.2 mg, the fuel cell system comprising:
a fuel cell stack configured to receive supplies of anode gas and cathode gas such that direction of a flow of the anode gas supplied to an anode is opposed to direction of a flow of the cathode gas supplied to a cathode; and a dryness reduction processor configured to perform at least one of controls of controlling temperature of the fuel cell stack to be not lower than 30° C. and not higher than 65° C., controlling a stoichiometric ratio of the cathode gas to be not lower than 1.0 and not higher than 1.5, controlling an outlet pressure of the anode gas to be not lower than 100 kPa and not higher than 250 kPa and controlling a stoichiometric ratio of the anode gas to be not lower than 1.25 and not higher than 5, in a case of power generation at a current density of not lower than 1.4 A/cm2.