FUEL CELL SYSTEM

摘要

When a request power for a fuel cell is smaller than a predetermined value, a fuel cell system stops supply of oxygen gas to a fuel cell and lowers the output voltage of the fuel cell from a user upper limit voltage (V1) to a reduction voltage (V3) so as to activate a catalyst. When the output voltage of the fuel cell is lowered to an air blow voltage (V4) because of insufficient oxygen gas, the fuel cell system supplies oxygen gas to recover the output voltage of the fuel cell.