BATTERY CELL AND BATTERY MODULE INCLUDING THE SAME

A battery cell according to one embodiment of the present disclosure includes a battery case that has an electrode assembly mounted therein and includes a sealing part having a structure in which the outer peripheral side is sealed by heat fusion; an electrode lead that is electrically connected to the electrode tab included in the electrode assembly and protrudes outward from the battery case via the sealing part; a lead film that is located between the electrode lead and the sealing part; and a protective member in contact with at least a part of an outer surface of the electrode lead, wherein the size of the protective member differs depending on the temperature of the electrode lead.