End cover assembly, battery and electric equipment

An end cover assembly, a battery and an electric device, the end cover assembly comprises a cover plate, a circuit board and a first connecting sheet, the circuit board and the cover plate are arranged at an interval, and the first connecting sheet is arranged between the cover plate and the circuit board and elastically abuts against the cover plate and the circuit board. By arranging the cover plate, the circuit board and the first connecting piece, the cover plate and the circuit board do not need to be welded, the structure is simple, and the assembling efficiency is high.