Battery pack and driving method thereof

A battery pack comprising:

• a battery cell;
• a charge switch and a discharge switch installed in a charge/discharge line of the battery cell;
• a fuse installed in the charge/discharge line of the battery cell;
• and
• a microcontroller programmed to sense and store voltages of the battery cell, and to control the charge switch, the discharge switch, and the fuse based on the sensed voltages of the battery cell;
• wherein the microcontroller is programmed to cut off the fuse and turn off only one of the charge switch and the discharge switch when the battery cell is disengaged from the battery pack, and
• wherein the microcontroller is programmed such that when the charge switch or the discharge switch is turned off and the fuse is cut off, the microcontroller enters into a permanent failure mode to prevent the microcontroller from being reused.