FUEL CELL SYSTEM

摘要

A fuel cell system performs control as follows. When a request power for the fuel cell is lower than a predetermined value, supply of a reaction gas to a fuel cell is stopped and the output voltage of the fuel cell is maintained at a high potential-avoiding voltage (V1) lower than the open end voltage (OCV). When the request power for the fuel cell is higher than the predetermined value, the output voltage of the fuel cell is controlled to be the high potential-avoiding voltage (V1) at the highest. By setting the upper limit of the output voltage of the fuel cell to the high potential-avoiding voltage (V1) which is lower than the open end voltage (OCV), it is possible to suppress degradation of a catalyst caused by increase of the output voltage of the fuel cell to the open end voltage (OCV).