BATTERY MODULE HAVING STRUCTURE INTO WHICH COOLING WATER CAN BE INTRODUCED WHEN THERMAL RUNAWAY PHENOMENON OCCURS, AND BATTERY PACK AND ENERGY STORAGE DEVICE COMPRISING SAME

摘要

A battery module according to an embodiment of the present disclosure includes a plurality of battery cells, a module housing in which a cell stack is received, the cell stack being formed by stacking the plurality of battery cells, an air inlet passing through the module housing on one side of a stack direction of the cell stack, an air outlet passing through the module housing on the other side in the stack direction of the cell stack, and an expandable pad disposed inside of the air inlet and the air outlet to close the air inlet and the air outlet by expansion upon contact with cooling water introduced into the battery module.