BATTERY MODULE, BATTERY PACK, AND VEHICLE

A battery module includes a cell assembly including a plurality of battery cells, a lower case having an open upper portion and including an accommodating space in which the cell assembly is accommodated, an upper case coupled to the lower case to cover the open upper portion of the lower case and including a connection hole perforated to communicate with the accommodating space, an upper cover coupled to the upper case to cover an upper portion of the upper case, forming a buffering space between the upper cover and the upper case by being spaced apart from the upper case, and including a discharge hole perforated such that the buffering space communicates with the outside, a partition member located in the buffering space to form a movement path extending from the connection hole to the discharge hole and having a shape extending in a horizontal direction, and a coupling member located on the movement path, configured to be coupled to the partition member, and including a movement space formed by perforating a body of the coupling member from one side to the other side of the body.