| 摘要 |
<p>The car power source apparatus is provided with a driving battery 1 having a plurality of connected batteries 10, battery-switches 2 that connect the driving battery 1 to the vehicle-side load 30, a control circuit 4 that controls the battery-switches 2, and an auxiliary battery 35 that supplies operating power to the control circuit 4 power supply line 5. The power source apparatus is provided with a supplementary power supply circuit 6 that supplies operating power to the control circuit 4 power supply line 5 from batteries 10 in the driving battery 1 to maintain control circuit 4 operation in the event of an auxiliary battery 35 voltage drop condition. In an auxiliary battery 35 voltage drop condition, the supplementary power supply circuit 6 supplies operating power to the control circuit 4 power supply line 5 and maintains control circuit 4 operation to maintain control of the battery-switches 2.
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