System and method of managing battery for eco-friendly vehicle

A system of managing battery for a vehicle, the system comprising:

• a first battery;
• a second battery;
• a first battery temperature management unit that is configured to maintain a temperature of the first battery within a predetermined temperature range;
• a battery charge unit that is configured to charge the second battery;
• a first measuring unit that is configured to measure a state of the second battery;
• a second measuring unit that is configured to measure a state of the first battery;
• and
• a controller that is configured to make the second battery be charged upon determining that the state of the second battery measured by the first measuring unit satisfies a predetermined charge condition, and that is configured to make a temperature of the first battery enter a first predetermined temperature range upon determining that the temperature of the first battery measured by the second measuring unit is out of the first predetermined temperature range,
• wherein the controller includes a first battery management unit that compares the state of the second battery measured by the first measuring unit with a predetermined value, and charges the second battery through the battery charge unit when the state of the second battery is equal to or less than the predetermined value, and
• wherein the controller is configured to wake up the second measuring unit to measure the state of the first battery before the first battery management unit of the controller controls the battery charge unit that in turn charges the second battery.