To provide a vehicular power supply unit capable of preventing obstructions of various kinds of functions of a vehicle by considering the arrangement relationship between light electric units and heavy electric units.
The vehicular power supply unit 10 includes a battery 20 to generate the power to be supplied to a motor 90 mounted on a vehicle, a light electric unit 30 connected to the battery and including a control device to control the voltage or the current of the battery 20 and controls the charge/discharge of the battery based on the result of detection, and a heavy electric unit 40 including a relay unit 42 arranged between at least one of a positive pole terminal 241 and a negative pole terminal 243 of the battery 20 and the motor 90 with the voltage higher than that of the light electric unit 30 is applied thereto. The battery 20, the light electric unit 30 and the heavy electric unit 40 are arranged in the width direction of the vehicle.
COPYRIGHT: (C)2006,JPO&NCIPI
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