Top cover structure and battery

The utility model relates to the technical field of batteries, and particularly discloses a top cover structure and a battery. The top cover structure comprises a pole cap, a pole hole is formed in the pole cap in a penetrating mode, and a fixing block is arranged on the inner side wall of the pole hole in a protruding mode. A first through hole is formed in the fixed plate in a penetrating manner, and a first groove is concavely formed in one side, deviating from the pole cap, of the fixed plate; a second through hole is formed in the insulating support in a penetrating mode, the first through hole and the second through hole are correspondingly formed, a first protrusion is arranged on the side, close to the fixing plate, of the insulating support in a protruding mode, and the first protrusion is fixedly connected with the first groove; the pole body can be arranged in the first through hole, the second through hole and the pole hole in a penetrating mode, a clamping groove corresponding to the fixing block