Electrode assembly, preparation method, battery monomer, battery and power utilization device

The invention provides an electrode assembly, a preparation method, a battery monomer, a battery and a power utilization device. The electrode assembly comprises an electrode main body and a first tab, the electrode main body comprises a plurality of first pole pieces and a plurality of second pole pieces, the polarity of the second pole pieces is opposite to that of the first pole pieces, the plurality of first pole pieces and the plurality of second pole pieces are alternately stacked to improve the battery rate, the first pole pieces comprise first current collectors and first coatings, and the second pole pieces comprise second current collectors and second coatings. The first current collector comprises a first empty foil area and a first coating area which are arranged along the extension direction of the first current collector, and the first coating area is coated with a first coating; one first tab is welded with the first empty foil areas of the plurality of first pole pieces, so that the welding process of the first tab and the first pole pieces is simplified, the welding time of the first tab in the battery manufacturing process is shortened, the working efficiency is improved, the plurality of first empty foil areas are connected with one first tab, the space occupied by the first tab in the battery is reduced, and the battery reliability is improved. The energy density of the battery is improved, and the battery performance is improved.