FIELD: electrical engineering.
SUBSTANCE: invention relates to a power supply device mounted on a vehicle. Device of electric power supply comprises high-voltage accumulator, low-voltage accumulator and control unit. Output voltage of the low-voltage accumulator is lower than the output voltage of the high-voltage accumulator. Low-voltage accumulator can be charged due to energy supplied from the high-voltage accumulator. Control unit is configured to control charging / discharging of high-voltage accumulator and low-voltage accumulator. Control unit performs power supply control so that high-voltage accumulator can supply power to predetermined device in vehicle, at a time when power consumption is higher than a predetermined power value in a state where the vehicle main switch is not on.
EFFECT: creation of electric power supply device, which prevents deterioration of working characteristics and reduction of service life of low-voltage accumulator.
4 cl, 7 dwg
