BATTERY MODULE HAVING STRUCTURE CAPABLE OF ABSORBING SWELLING, AND BATTERY PACK AND VEHICLE COMPRISING SAME

A battery module of the present disclosure includes: a cell stack including a plurality of battery cells; a first end plate and a second end plate respectively covering a top surface and a bottom surface of the cell stack; a first upper reinforcing plate and a second upper reinforcing plate located on the first end plate and respectively extending from a side and the other side of the first end plate in a longitudinal direction of the first end plate toward a central portion; a first lower reinforcing plate and a second lower reinforcing plate located on the second end plate and respectively extending from a side and the other side of the second end plate in a longitudinal direction of the second end plate toward a central portion; a first fastening bolt located on a side of the cell stack in a longitudinal direction of the cell stack, and passing through the first upper reinforcing plate, the first end plate, the second end plate, and the first lower reinforcing plate; and a second fastening bolt located on the other side of the cell stack in the longitudinal direction of the cell stack, and passing through the second upper reinforcing plate, the first end plate, the second end plate, and the second lower reinforcing plate.