SYSTEM AND METHOD FOR SUPPLYING POWER(12-VOTAGE) TO VEHICLES OPERATED BY POWER(42-VOLTAGE), PARTICULARLY CONCERNED WITH SELECTING ONE BATTERY HAVING MAXIMUM AVAILABLE ENERGY OF THREE BATTERIES

摘要

PURPOSE: A system and method for supplying power(12-voltage) to a vehicle operated at power (42-voltage) are provided to efficiently use energy by selecting one battery relatively having the much available power out of three 12-voltage batteries comprised in a 36-voltage battery. CONSTITUTION: A system for supplying power(12-voltage) to a vehicle operated at power(42-voltage) includes a 36-voltage battery(10), a relay(20), and a BMS(30). The 36-votage battery stores the power generated at a 42-voltage generator and includes three 12-voltage batteries(11,13,15) connected in series. The relay selects one of the three batteries. The BMS(Battery management System) measures available power of the three batteries and controls the relay so as to select the one having the maximum available power of the three batteries.