BATTERY MODULE HAVING STRUCTURE CAPABLE OF RAPID COOLING, AND ESS COMPRISING SAME

A battery module includes a plurality of battery cells; a module housing configured to accommodate a cell stack including the plurality of battery cells; and a sprinkler provided through the module housing at one side of the cell stack in a stacking direction, and the sprinkler includes a coupler positioned at an outer side of the module housing and connected to a supply tube that supplies a cooling fluid; a sprinkler head positioned at an inner side of the module housing and connected to the coupler; and an insulation cover including a fixing portion fixed to the module housing and a cover portion fixed to the fixing portion by a bonding layer to cover the sprinkler head and configured to be separated from the fixing portion over a reference temperature as a bonding force of the bonding layer is decreased or lost.