BATTERY MODULE

A battery module is disclosed. The battery module comprises: a module housing having an accommodation space formed therein and an open upper side; a top plate installed to cover the upper side of the module housing; a plurality of battery cells stacked in the accommodation space of the module housing; and at least one thermal barrier which is interposed between one or more battery cells, is connected to the top plate, and is deformed while being connected to the top plate when opening the top plate so as to block the flame from propagating to neighboring battery cells.