| 摘要 |
The car power source apparatus is provided with a driving battery 1 having a plurality of battery modules 2 connected in series, contactors (electric vehicle battery relay contacts) 6 connected to the output side of the driving battery 1 , a control circuit 7 to control the contactors 6 on and off, and a voltage detection circuit 3 to detect voltage of the battery modules 2 of the driving battery 1 . Both the control circuit 7 and voltage detection circuit 3 are provided with output voltage detection circuits 7 a, 3 a to detect contactor 6 output voltage. If the output voltage detection circuit 7 a in the control circuit 7 cannot detect contactor 6 output voltage, the output voltage detection; circuit 3 a in the voltage detection circuit 3 detects contactor 6 output voltage to determine if a contactor 6 is fused closed.
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