Battery warm up system and method for warming up battery using the same

A battery warm up system, comprising:

• 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 battery state measuring unit to measure a state of charge (SOC) of each of a plurality of battery modules constituting the battery pack;
• 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 output a balancing start signal by referring to the SOC of each of the plurality of battery modules;
• a forced discharging circuit unit to force a certain battery module among the plurality of battery modules to be discharged in response to the forced discharging start signal;
• and
• a balancing unit to balance the SOC of each battery module in response to the balancing start signal.

A method for warming up a battery, the method comprising:

• determining whether a door open signal for opening a door of a vehicle is received;
• comparing a temperature of a battery pack to a set first reference temperature;
• and
• outputting a forced discharging start signal when the door open signal is received and the temperature of the battery pack is lower than the first reference temperature.