The present application relates to a battery controlling apparatus and a method for controlling a battery, the battery controlling apparatus includes a temperature sensor, a voltage sensor and a controller, the voltage sensor is connected with the battery, an output end of the voltage sensor is connected with the controller, an input end of the temperature sensor is connected with the battery and an output end of the temperature sensor is connected with the controller; the voltage sensor transfers an acquired voltage of the battery to the controller, the temperature sensor transfers an acquired present temperature of the battery to the controller, the controller controls the battery to be in a charging state or a discharging state according to the acquired present temperature of the battery and a relationship between a preset cut-off voltage corresponding to the present temperature of the battery and the voltage of the battery.