| 摘要 |
PROBLEM TO BE SOLVED: To prevent the inconvenience in the case that there was great power consumption in condition that the residual quantity of a low-voltage battery is not enough, by supplying backup power so that the power supply to an opening/closing control means may not fall under the expected value. SOLUTION: This has a feature in the point of supplying a part (DCOUIT 12) of the output of an auxiliary power source 75 functioning as a power supply source of low voltage (12V) to an inner circuit, being built in a DC-DC converter (DD) 7, to ECU 6 and the relay 3L too of the main switch 3 as backup power. The auxiliary power source 75 converts high voltage outputted from a high- voltage battery 4 into low voltage, with a kind of DD, but the load is limited to the inside of DD 7a of a control block 74, etc., and the auxiliary machine and the low-voltage battery 5 are not a load. Accordingly, the auxiliary power source 75 can stabilize low voltage even if the load of DD 7a becomes large. |
