SYSTEM FOR PREHEATING BATTERIES AND METHOD FOR PREHEATING BATTERIES USING SAME

A battery warm up system according to the present disclosure includes an open signal receiving unit to receive a door open signal for opening a door of a vehicle, a temperature measuring unit to measure a temperature of a battery pack connected to a starter of the vehicle, a control unit to output a forced discharging start signal by referring to information associated with the temperature measured by the temperature measuring unit when the door open signal is received by the open signal receiving unit, and a forced discharging circuit unit to force a plurality of battery modules constituting the battery pack to be discharged in response to the forced discharging start signal. According to the present disclosure, cold startability of a vehicle may be significantly improved using heat generation of a battery itself while not causing a great change to an existing power supply system for vehicles, and efficient warm up may be achieved without unnecessary consumption of the battery pack by allowing a vehicle user to select a time to start warming up.