A battery cell includes a housing, an electrode terminal, an electrode assembly, and a first insulating member. The housing has a first wall and a second wall, where the second wall surrounds an edge of the first wall. The electrode terminal is mounted on the first wall in an insulating manner. The electrode assembly is accommodated in the housing, and the electrode assembly includes a main body portion, a first tab, and a second tab, where the first tab and the second tab have opposite polarities, along a thickness direction of the first wall, the main body portion has a first end surface close to the first wall, the first tab and the second tab are both provided on the first end surface, the first tab is electrically connected to the electrode terminal, and the second tab is electrically connected to the housing.