SYSTEM FOR BATTERY OF CAR HAVING ENERGY STORAGE PART

A system for a battery of a car is provided. The system includes a battery assembly having a first battery module and a second battery module, relays installed between contact points connected with respective terminals of the first battery module and the second battery module and controlling power supply from a driving motor of the car, a converter converting voltage input from the first battery module and the second battery module and supplying the converted voltage to a low-voltage electronic product, an energy storage part connected to an output terminal of the converter, and a battery management part controlling the same.