| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an operation stop method of a full cell system capable of suppressing fuel cell deterioration as much as possible with a simple and compact configuration. <P>SOLUTION: An operation stop method of a fuel cell system 10 comprises: a first step of making a fuel cell stack 12 generate power while supplying a hydrogen gas and air to the fuel cell stack 12; a second step of stopping the supply of the hydrogen gas when detecting a stop command of the fuel cell stack 12, and making the fuel cell stack 12 generate power while supplying the air to the fuel cell stack 12 with an oxygen stoichiometric ratio lower than an oxygen stoichiometric ratio for normal power generation; and a third step of making the fuel cell stack 12 generate power only with a residual gas in the fuel cell stack 12 after stopping supply of an oxidant gas to the fuel cell stack 12, and supplying generated power obtained from the fuel cell stack 12 to a cooling medium supply device 15. <P>COPYRIGHT: (C)2012,JPO&INPIT |
