Driving power source supply device of electric car and controlling method therefore

PURPOSE: A power supply of the electric car and a controlling method thereof are provided to charge power generated by small generators to the battery of an electric car, thereby maximizing the fuel efficiency. CONSTITUTION: A plurality of small generators (5) is installed at the rotary shaft (4) of an electric vehicle (3). The small generators divide re-applied power and generate the charging power of the electric vehicle. A charging device (7) includes a battery (6). The battery is mounted inside the trunk of the electric vehicle. A control module (9) controls generally the power supply function of the electric vehicle. [Reference numerals] (1) Main driving motor; (12) Production power conversion unit; (6) Battery; (9) Control module