The utility model relates to the technical field of batteries, and discloses a battery top cover
assembly, a battery and a power device. The battery top cover
assembly comprises a cover plate and an insulating part, the cover plate is provided with a pole; the insulating part is of a flat plate structure, a first avoiding hole is formed in the position, corresponding to the pole, of the insulating part, one end of the pole penetrates through the first avoiding hole, and the pole is suitable for being conductively connected with a pole lug of a pole group; the
peripheral edge of the insulating part is recessed from the
peripheral edge of the cover plate to form a step structure. According to the battery top cover
assembly provided by the utility model, the insulating part is of a flat plate structure, the structure is simple, the
processing is easy, the battery top cover assembly can be quickly obtained only through
die cutting, the
processing technology is simple, and the cost is low. As the
peripheral edge of the insulating part is sunken in the peripheral edge of the cover plate to form a step structure, when the cover plate and the shell of the battery are welded, the insulating part is prevented from being scalded and warped, or
welding laser is prevented from leaking into the interior to sweep the insulating part, and the insulating part is prevented from being burnt.