BATTERY MODULE INCLUDING FOLDABLE SIDE PLATE AND METHOD FOR MANUFACTURING SAME

A battery module includes a first module and a second module, each including a cell stack having a plurality of battery cells stacked vertically and a bus bar frame assembly configured to cover a front surface and a rear surface of the cell stack; and a pair of foldable side plates including a first side plate configured to cover and pressurize one side surface and the other side surface of the first module and a second side plate configured to cover and pressurize one side surface and the other side surface of the second module and hinged to the first side plate.