Top cover of power battery

The utility model discloses a top cover of a power battery, which comprises a cover plate provided with a through pole mounting hole; the pole is arranged in the pole mounting hole in a penetrating manner, and a first circumferential limiting part is formed on the periphery of the pole; the upper insulating part is arranged in the pole mounting hole and surrounds the periphery of the pole, a first circumferential matching part is arranged at the position, corresponding to the first circumferential limiting part, of the upper insulating part, and the first circumferential matching part is matched with the first circumferential limiting part in a limiting mode so as to achieve circumferential limiting of the pole. The power battery cover plate can effectively prevent relative rotation of the pole, the lower insulating part and the cover plate, and the sealing performance is improved. 本实用新型公开了一种动力电池顶盖，包括盖板，设置有贯通的极柱安装孔；极柱，穿设于所述极柱安装孔中，所述极柱外周形成有一第一周向限位部；上绝缘件，设置于所述极柱安装孔内并绕所述极柱外周设置，所述上绝缘件对应于所述第一周向限位部的位置处设置有一第一周向配合部，所