End cover assembly, battery monomer, battery pack and electric equipment

The utility model discloses an end cover assembly, a battery monomer, a battery pack and electric equipment. The end cover assembly is used for a single battery and comprises an insulating plate, and a first through hole and a second through hole which are formed in the insulating plate; the first pole part and the first connecting plate are integrally formed, the second pole part and the second connecting plate are integrally formed, the first pole part penetrates through the first through hole, the second pole part penetrates through the second through hole, and one end of the first connecting plate is fixedly connected with one end of the second connecting plate; the protruding part is arranged between the connecting plate and the pole part, and the sealing piece is arranged in the through hole and used for connecting the insulating plate and the pole part in a sealing mode, so that the insulating and pressure-resistant performance of the end cover assembly is improved. In the multi-pole column battery, each pole column part and the corresponding connecting part are integrally formed, the forming process is simple, the assembly efficiency is high, and the connecting parts are connected and fixed through the corresponding mounting pieces, so that the stability of connection between the pole column parts and the connecting plates is favorably improved.