Laminated electrode assembly, battery cell, battery and electric device

The invention provides a laminated electrode assembly, a battery monomer, a battery and an electric device, and belongs to the technical field of batteries. The laminated electrode assembly comprises a first pole piece and a second pole piece which are opposite in polarity, and the first pole piece and the second pole piece are arranged in a laminated mode in the first direction. The first pole piece comprises a first coating area and a first blank area which are arranged in the second direction, the first blank area comprises a first connecting part and a first tab part, the first connecting part is connected with the first coating area and the first tab part, and the size of the first connecting part is larger than that of the first tab part in the third direction; and the first direction, the second direction and the third direction are vertical pairwise. The first connecting parts of the plurality of first pole pieces are folded at one end of the laminated electrode assembly in the second direction to for