| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To secure working of an electric load while maintaining electric power balance between two batteries in parking a vehicle when an engine is stopped. <P>SOLUTION: The high voltage battery and the low voltage battery and a DC-DC converter interposed between both of the batteries and to transfer voltage are provided. A battery state of the low voltage battery is determined when an electric load on the low voltage battery side is actuated by electric power supply through the DC-DC converter from the high voltage battery in parking the vehicle when the vehicle engine is stopped, and output voltage of the DC-DC converter is fed-back and controlled so that electric charging and discharging of the low voltage battery is not practiced in accordance with the battery state. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
