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, an upper case coupled to the lower case and including a connection hole to communicate with the accommodating space, an upper cover coupled to 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 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.