| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent deterioration of a fuel cell stack at the time of next starting, so that oxygen in air is permeated to a cell from a stack case during stop of a fuel battery. <P>SOLUTION: Oxidant electrode exhaust which is discharged from a cathode 4 while power generation of a fuel cell stack 2 is continued and whose oxygen density is reduced, is generated during stop of a fuel battery system. The oxidant electrode exhaust is introduced to an internal space of the stack case 5 via an exhaust introduction pipe 19, a case introduction valve 20 and a case introduction piping 21. Air in the stack case 5 is pushed out to the open air via a case exhaust piping 22 and a case exhaust valve 23. When gas replacement in the stack case is completed, the case introduction valve 20 and the case exhaust valve 23 are closed. <P>COPYRIGHT: (C)2010,JPO&INPIT |
