| 摘要 |
PROBLEM TO BE SOLVED: To secure at least a power supply path to electrical equipment with high importance even if an unexpected power supply abnormality occurs.SOLUTION: In a power supply box body circuit 10 including a +B power side circuit 20 connected to a +B power side input line 11 and an IG power side circuit 30 connected to an IG power side input line 12, a first relay 41 for recovery capable of connecting the IG power side input line 12 and input of the +B power side circuit 20 is provided. In the case where power supply from a +B system is interrupted by disconnecting the +B power side input line 11, a voltage Vbin is monitored, an abnormality is detected, the first relay 41 for recovery is switched, and power of an IG system is supplied to the side of the +B power side circuit 20. Power supply to a load of a low priority that is not directly associated with driving of a vehicle is automatically cut off, and supply power is prevented from being lacked.SELECTED DRAWING: Figure 1 |
