| 摘要 |
<P>PROBLEM TO BE SOLVED: To use a high-voltage battery by sufficiently charging it while suppressing the deterioration of the high-voltage battery. <P>SOLUTION: It is determined whether a terminal voltage Vi of the high-voltage battery exceeds a prescribed voltage V1 or not (mark b) when an ignition switch is switched to an off-state (mark a). When it is determined that the terminal voltage Vi exceeds the prescribed voltage V1 for a prescribed time TO (mark c), drive states of a converter are switched (mark d), and a low-voltage battery is charged by the high-voltage battery. In continuation to this, when it is determined that the terminal voltage Vi of the high-voltage battery is lower than the a prescribed voltage V2 (mark e), the discharge of the high-voltage battery is stopped by the stop of the converter (mark f). As above, since the high-voltage battery is not left in a highly-charged state, the deterioration of the high-voltage battery can be suppressed even if the high-voltage battery is sufficiently charged and used. <P>COPYRIGHT: (C)2010,JPO&INPIT |
