Immersion-Cooled Battery Module, and Battery Pack and Vehicle Including the Same

An immersion-cooled battery module according to an embodiment of the present disclosure includes a battery assembly; a module case having an opening at least at one end and accommodating the battery assembly in an internal space connected to the opening; and a sealing cover that airtightly covers the opening, wherein the battery assembly includes a plurality of sub-battery modules each having a battery cell stack in which a plurality of battery cells are stacked and disposed side by side in one direction; and an insulating block made of an insulating material and disposed between the first sub-battery module and the second sub-battery module adjacent to each other among the plurality of sub-battery modules.