End cover assembly, battery, battery pack and electric equipment

The utility model discloses an end cover assembly, a battery, a battery pack and electric equipment. The end cover assembly comprises a top cover and a boss, the top cover and the boss are both conductive. The top cover includes a first surface. The boss comprises a solid convex part, and the solid convex part is fixed to the top cover and protrudes relative to the first surface. And the solid convex part is used for connecting a wire harness. And the wire harness is welded on the solid convex part, so that the boss cannot be welded through due to welding, electrolyte leakage is avoided, and the performance of the battery is ensured to meet the requirements. 本申请公开了一种端盖组件、电池、电池包及用电设备，包括顶盖和凸台。顶盖和凸台均具有导电性。顶盖包括第一表面。凸台包括实心凸部，实心凸部固定于顶盖，且相对第一表面凸起。实心凸部用于连接线束。将线束焊接在实心凸部上，凸台不会因为焊接而出现焊穿的情况，避免电解液泄漏，保证电池的性能满足要求。