BATTERY PACK

A battery pack including a plurality of battery cells; a first case accommodating the plurality of battery cells; a protection circuit module coupled to one side of the plurality of battery cells and electrically connecting the plurality of battery cells; a bus bar electrically connected to the protection circuit module and extending in one direction along the plurality of battery cells; and a second case coupled to the first case and accommodating the plurality of battery cells, the protection circuit module, and the bus bar, wherein the bus bar includes a diverged branch formed by cutting a region of the bus bar in the one direction.