Patent ID: 9340123
Filing Date: 2016-05-17
CPC Classification: B60L,Y02T

Claim Text:
1. A power supply system for electric vehicle (EV), the system including a high voltage battery generating a driving voltage to a motor of the EV, and a low voltage battery generating a driving voltage for other electronic equipment, the system comprising: a low voltage DC-DC converter (LDC) configured to convert a high voltage from the high voltage battery to a first voltage for the low voltage battery; an alternator configured to generate an AC voltage using a rotary power of the motor; a rectifier configured to rectify the AC voltage from the alternator to generate a second voltage, the second voltage including a DC voltage; a comparator to compare the second voltage with a reference voltage; and a selector configured to supply the second voltage from the rectifier to the low voltage battery when the second voltage is greater than the reference voltage and supply the first voltage from the LDC to the low voltage battery when the second voltage is less than the reference voltage.