Honda Motor Co., Ltd.
Electric power control device

Abstract:

An electric power control device includes: an ECU; a DC power supply; a backup power supply which has a control power supply as an operation source, supplies electric power to the ECU when an electric power supply from a battery to the ECU is stopped, and supplies electric power to the DC power supply when an electric power supply from the battery to the DC power supply is stopped; a first ground line connected to a ground terminal of the DC power supply; a second ground line connected to a ground terminal of the backup power supply; a current path formation unit which electrically connects the first ground line to the second ground line and forms a path in which a current flows from the first ground line to the second ground line in one direction; and a noise minimizing component connected to the current path formation unit in series.