| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the degradation of an electrolyte membrane or the like concerning a fuel cell system. <P>SOLUTION: At stopping of a fuel cell 2, a control unit 5 controls a compressor 31 to set a flow volume of oxidization gas at a predetermined volume as a process on a cathode electrode side, and controls a back pressure regulation valve 34 to make a pressure of oxidization gas on the cathode electrode side to be pressure Pa. At the same time, as an anode electrode side process, the control unit controls a main stop valve 43 to stop supply of hydrogen gas, and makes the fuel cell 2 generate power to lower a pressure of hydrogen gas on the anode electrode side down to pressure Pb. Then, the control unit makes an offgas supply valve 61 open its valve to open an exhaust air drain valve 47 when the pressure of the hydrogen gas on the anode electrode side is higher than the atmosphere pressure. <P>COPYRIGHT: (C)2010,JPO&INPIT |
