A battery control method includes detecting charge state information including a charge current, a discharge current, and an SOC of the battery, detecting whether the SOC of the battery reaches a predetermined reference SOC using the charge state information, and determining when the SOC of the battery reaches the reference SOC as a first reference time point and when the SOC of the battery reaches the reference SOC after the first reference time point as a second reference time point, calculating a charge capacity of the battery using a charge current from the first time point to the second time point and a discharge capacity of the battery using the discharge current, comparing a difference between the charge capacity and the discharge capacity, and determining that an internal short circuit of the battery occurs when the difference between the charge capacity and the discharge capacity exceeds a threshold value.