BATTERY CELL AND METHOD FOR MANUFACTURING THEREOF, BATTERY SYSTEM AND ELECTRIC VEHICLE

A battery cell, a method for manufacturing a battery cell, a battery system, and an electric vehicle are disclosed. A battery cell includes a battery cell housing and a protective cover. The battery cell housing includes a pair of electrode terminals and a venting valve located on a terminal side. The protective cover is configured to cover the terminal side and to be folded to further cover two opposite side walls of the battery cell housing extending from the terminal side to an extent of at least 25 percent of an area of each of the opposite side walls. Further, the protective cover has a heat resistance of at least 800° C.