| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress a relay from being damaged by an excessive current from a high voltage system to which power from a first battery is supplied to a low voltage system to which power from a second battery is supplied, when switching ON/OFF of the relay. <P>SOLUTION: When switching ON/OFF of a system main relay 24, ON/OFF of the system main relay 24 is switched in the state where a DC/DC converter 44 is drive-controlled in such a way that an output voltage from a power line 32 of a high voltage system to which power of a high voltage battery 22 is supplied to a power line 42 of a low voltage system to which power of a low voltage battery 40 is supplied becomes a predetermined voltage V0 smaller than a voltage of the low voltage battery 40. Thus, the system main relay 24 can be suppressed from being damaged by deposition of a contact or overheat of a resistor 24d because of an excessive current from the high voltage system to the low voltage system. <P>COPYRIGHT: (C)2012,JPO&INPIT |
