The battery cell includes: a housing, where the housing defines an accommodating cavity, and an explosion-proof valve is disposed at a bottom of the housing; and a bottom support, is disposed on a bottom wall of the accommodating cavity. The bottom support includes: a support plate, where a side surface of the support plate facing the bottom wall of the accommodating cavity is a first surface; and a support frame, where the support frame includes at least one first support rib, and the at least one first support rib is disposed on the first surface, extends along a length direction of the support plate, and is arranged on at least one side edge of the support plate in a width direction. A gas flow channel in communication with the explosion-proof valve is defined between the first support rib, the first surface, and the bottom wall of the accommodating cavity.