A battery cell includes a housing, an electrode component, an end cap, an electrode terminal, and an insulating component. The housing has an opening. The electrode component is accommodated within the housing. The end cap is configured to cover the opening. The electrode terminal is disposed on the end cap and electrically connected to the electrode component. The insulating component is configured to insulate and separate the end cap from the electrode terminal, and at least a part of the insulating component is located between the end cap and the electrode terminal and is attached to the end cap and the electrode terminal.