System and method for managing battery of vehicle

A method of managing a battery of a vehicle, the method comprising:

• when receiving an external input for terminating vehicle driving, controlling a plurality of controllers in the vehicle in a power-off (IG OFF) state, by a first controller;
• turning off a main relay connected to a first battery storing energy for generating driving power of the vehicle while maintaining power, by a second controller;
• a first monitoring operation of setting a wake-up period of the first controller, and monitoring a state of the first battery of the vehicle by maintaining power during a preset first reference time, by the second controller;
• a second monitoring operation of, when the first reference time elapses, being woken up at the wake-up period of the first controller, and monitoring the state of the first battery, by the second controller;
• and
• after the turning off the main relay:
• determining not to perform the first monitoring operation by the second controller when not to allowed to check a state of charge (SoC) of a second battery for providing power voltage of the first controller and the second controller, when a SoC of the first battery is lower than a preset reference, or when not allowed to communicate with a low voltage DC-DC converter (LDC) or the first controller for dropping a voltage of the first battery and applying the voltage to the second battery.

A method of managing a battery of a vehicle, the method comprising:

• when receiving an external input for terminating vehicle driving, controlling a plurality of controllers in the vehicle in a power-off (IG OFF) state, by a first controller;
• turning off a main relay connected to a first battery storing energy for generating driving power of the vehicle while maintaining power, by a second controller;
• a first monitoring operation of setting a wake-up period of the first controller, and monitoring a state of the first battery of the vehicle by maintaining power during a preset first reference time, by the second controller;
• and
• a second monitoring operation of, when the first reference time elapses, being woken up at the wake-up period of the first controller, and monitoring the state of the first battery, by the second controller,
• wherein the second monitoring operation comprises, after being woken up, determining a reason of wake-up, checking whether the main relay is turned on when the determined reason is the external input rather than the wake-up period set by the first controller, and terminating monitoring of the state of the first battery when the main relay is turned on, by the second controller.