BATTERY MODULE HAVING STRUCTURE IN WHICH ENERGY DENSITY IS IMPROVED, AND BATTERY PACK AND VEHICLE COMPRISING SAME

Disclosed is a battery module, which includes a cell stack formed by stacking a plurality of battery cells; a bus bar frame assembly including a bus bar frame configured to cover one longitudinal end and the other longitudinal end of the cell stack and a plurality of bus bars fixed on the bus bar frame and electrically connected to the battery cells; and an outer terminal connected to the bus bar. A pair of electrode leads provided to the battery cell are formed at locations biased downward from a center of the cell stack in a height direction, and the outer terminal is disposed in the space formed above the electrode lead due to biasing of the electrode lead.