BATTERY PACK WITH IMPROVED SAFETY

摘要

According to one embodiment of the present invention, a battery pack comprises: at least one battery cell; a pack case for accommodating the battery cell; a first fixed terminal electrically connected to the battery cell and fixed to the pack case; a second fixed terminal fixed to the pack case and connected to an external connector or an adjacent battery pack; and a bus bar having one side connected to the first fixed terminal in a longitudinal direction and the other side connected to the second fixed terminal in the longitudinal direction. The pack case includes a pair of rotation pressing units installed to apply rupture pressure to the bus bar by being rotated by an expansion force induced by a swelling phenomenon of the battery cell. According to one embodiment of the present invention, when an abnormal phenomenon such as an overcurrent flowing in a battery pack due a short circuit or the like, occurs, a flow path of the current can be quickly and securely blocked, thereby securing the safety of use of a secondary battery.