| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the gas evolution polarization of a fuel cell and suppress deterioration of the fuel cell. <P>SOLUTION: The operation of a hydrogen circulation pump 9 is stopped when the voltage of the fuel cell 3 is dropped lower than gas evolution polarization voltage at which gas evolution polarization may be caused during the operation of the hydrogen circulation pump 9 circulating unused hydrogen exhausted from the fuel cell 3 to the inlet of the fuel cell 3 through a hydrogen circulation passage 8 at the starting of a fuel cell system containing fuel gas substitution operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
