Top cover assembly and battery

Abstract

The present disclosure discloses a top cover assembly and a battery. The top cover assembly includes a cover plate and a fitted assembly. The cover plate has a through hole extending through a first side and a second side, the first side and the second side being opposite sides of the cover plate. The fitted assembly includes a pole, a first insulation member, and a metal sleeve. The pole passes through the through hole and protrudes from the first side. The first insulation member is disposed around the pole and located at the first side of the cover plate. The metal sleeve is disposed around the pole and at least partially located at the first side of the cover plate. The metal sleeve is connected to the first insulation member. The first insulation member is disposed between the metal sleeve and the pole.