BATTERY MODULE, BATTERY PACK, AND VEHICLE

A battery module includes a cell assembly having at least two battery cells; a module housing having an inner space accommodating the cell assembly, and including a circulation hole so that the inner space is connected to an outside; a mesh member having a mesh structure and provided in the circulation hole of the module housing; and a sealing member provided at a position facing the mesh member and configured to expand a volume at more than a predetermined temperature to seal a mesh hole of the mesh member.