| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel battery system which brings a hydrogen concentration level in an exhaust gas down to a given value or lower, is capable of restarting even when power generation by fuel batteries stops and the system remains suspended in a low-temperature environment, and enables efficient use of energy. <P>SOLUTION: The fuel battery system includes a hydrogen-based-gas circulating pump 34 driven by a high-voltage power supply, a purge valve 40 driven by a low-voltage power supply, and an electronic controller 26. When only the purge valve 40 out of the purge valve 40 and the hydrogen-based-gas circulating pump 34 is judged to be at zero degree or lower in temperature and a hydrogen concentration level in fuel gas circulating path 32 is judged to be less than a given concentration level after suspension of power generation by the fuel batteries, the electronic controller carries out control to drive only the purge valve 40 out of the purge valve 40 and the hydrogen-based-gas circulating pump 34 through the low-voltage power supply so that the hydrogen-gas-based gas is discharged via the purge valve 40. <P>COPYRIGHT: (C)2008,JPO&INPIT |
