Pole piece, battery cell and battery

The invention relates to the field of battery production, in particular to a pole piece, a battery cell and a battery. The pole piece comprises a current collector which is provided with a first surface and a second surface which are oppositely arranged, and the first surface comprises a first coating area and a first blank area; the first active material layer is coated in the first coating area, and the first active material layer is provided with a first edge area close to one side of the first blank area; the first conducting strip is connected to the first blank area of the current collector through welding, and the first conducting strip is provided with a first welding area; the pole piece further comprises a first coating layer, and the first coating layer covers at least part of the first edge area of the first active material layer and at least part of the first welding area. By applying the technical scheme provided by the invention, the problems that the performance of the pole piece is poor and t