| 摘要 |
<P>PROBLEM TO BE SOLVED: To reliably transmit vehicle voltage signals from cells to the vehicle side while keeping a driving power battery insulated from chassis grounding. <P>SOLUTION: A power supply system for vehicle use comprises a first measuring circuit 2 for detecting the voltages of cells 10 of a driving power battery 1, and a second measuring circuit 3 for detecting any over-charging or over-discharging. The power supply system is provided with: a high-voltage side power supply circuit 4 that supplies power from the driving power battery 1 to the first measuring circuit 2 and the second measuring circuit 3; insulating circuits 5 that insulate the outputs of the first measuring circuit 2 and the second measuring circuit 3 from each other and output them to the vehicle side; and low-voltage side power supply circuits 6 that supply power from an electrical equipment-serving battery 7 to the insulating circuits 5. In the power supply system, the first measuring circuit 2 that is actuated by the high-voltage side power supply circuit 4 outputs to the vehicle side a voltage signal via a first insulating circuit 5A that is actuated by a first low-voltage side power supply circuit 6A, and the second measuring circuit 3 that is actuated by the high-voltage side power supply circuit 4 outputs to the vehicle side an abnormality signal via a second insulating circuit 5B actuated by a second low-voltage side power supply circuit 6B. <P>COPYRIGHT: (C)2013,JPO&INPIT |
