Patent ID: 8217628

Claim:
A battery pack, comprising: a battery including a positive electrode and a negative electrode; a switching module including a charge switching device and a discharge switching device, the charge switching device and discharge switching device being electrically connected to a high current path of the battery; a battery management unit (BMU) electrically connected to the switching module, the BMU being configured to adjust a limit value for a charging current supplied by the charge switching device and to set a magnitude of the charging current supplied by the charge switching device to be equal to or less than the adjusted limit value; a temperature sensor electrically connected to the BMU and to the high current path of the battery; and a voltage smoothing circuit electrically connected to the charge switching device, the BMU, and the high current path of the battery, wherein the BMU is configured to apply a pulse-width modulation (PWM) signal to the voltage smoothing circuit and to regulate the charging current of the charge switching device by varying a duty ratio of the PWM signal according to a temperature measured by the temperature sensor.