Battery case, battery, and electronic device

A battery case characterized by comprising a case body, a first cover body, a first insulating part, and a second cover body, wherein

• the case body comprises a bottom wall and a side wall connected to the bottom wall;
• the first cover body comprises a first surface and a second surface disposed opposite to each other;
• the second cover body comprises a third surface and a fourth surface disposed opposite to each other;
• the first surface of the first cover body is connected to one end of the side wall away from the bottom wall, and the second surface of the first cover body is connected to the third surface of the second cover body by the first insulating part;
• the first cover body is provided with a first through hole, and the first insulating part is provided with a second through hole corresponding to the first through hole;
• an inner edge of the first insulating part is covered with an annular adhesive dispense layer;
• an annular groove or a convex rib is annularly disposed on an end surface of one side of the second cover body facing the first cover body, and the annular groove or the convex rib is located between an area where a tab of a battery cell and the second cover body are electrically connected and the adhesive dispense layer.