BATTERY CELL, BATTERY CELL ASSEMBLY, AND BATTERY PACK

According to exemplary embodiments, a battery cell is provided. The battery cell includes an electrode including a positive electrode, a negative electrode, and a separator; a cell case including an accommodating part in which the electrode is accommodated and a terrace surrounding the accommodating part; and a beat generator coupled to the cell case, wherein the beat generator is configured to apply an acoustic beat into the cell case.