Battery Pack

Provided is a battery pack, including a battery module array including a plurality of battery modules coupled in series and having first and second terminals, each of the plurality of battery modules including at least one battery cell, a current blocking element coupled to the battery cell and opened when an overcurrent is applied, and a sensor unit measuring state information of the battery cell and transmitting the measured information; a battery blocking unit including a first switch unit coupled to the first terminal in series, a second switch unit coupled to the second terminal in series, and a third switch unit coupled to the first and second terminals; and a battery management system turning on the third switch unit to open the current blocking element when the measured information exceeds a predetermined threshold value.