The battery case includes: a first case, a second case, a first sealing member, and first fasteners. The first case and the second case are connected in a sealed manner to form a sealed cavity, the first case includes a first sealing surface, the second case includes a second sealing surface, and the first sealing surface cooperates with the second sealing surface to form a sealing interface. The first sealing member is disposed at the sealing interface to seal the first sealing surface and the second sealing surface. The first fasteners pass through the first sealing surface and the second sealing surface to connect the first sealing surface and the second sealing surface to clamp the first sealing member. The first fasteners are completely located outside the sealed cavity, and are located on a side, distal to the sealed cavity, of the first sealing member.