Abstract: Disclosed is a thermal management system for a vehicle, the thermal management system including a refrigerant line in which a refrigerant circulates, the refrigerant line having a closed loop including a compressor, a condensing core, an expansion valve, and an evaporation core, a first coolant line in which a coolant flows while circulating between the evaporation core and an electronic component of a vehicle, a second coolant line in which the coolant flows while circulating between the condensing core and a radiator, and a fluid line in which a non-conductive fluid flows while circulating between an interior air conditioning part and the condensing core or the evaporation core, in which a heating core of the interior air conditioning part and a battery are connected, and the non-conductive fluid is introduced into a battery housing and is in direct thermal conduction with a battery cell.

Abstract: A battery case and a heat management system for a battery module having the battery case, in which the battery case ensures airtightness allowing a liquid immersion cooling method based on a nonconductive refrigerant to be used in managing the heat of the battery module, and the internal temperature of the battery case and the level of the nonconductive refrigerant are controlled to remain constant so as to keep the battery cell below an ignition point, thereby preventing a fire from breaking out.