Anode pole piece, battery and electric device

The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to an anode pole piece which comprises a metal foil and an active material layer coated on the metal foil, the active material layer comprises boundary parts, the boundary parts are respectively arranged at the head part and the tail part of the anode pole piece, and the boundary parts are connected with the metal foil. The boundary part comprises a main body area and thinning areas connected with the main body area, the thinning areas are located on the two sides of the main body area, and the ratio of the thickness of the thinning areas to the thickness of the main body area is 0%-99.9%. According to the utility model, the head and the tail of the anode pole piece are provided with the thinning areas, so that the lithium supplementing amount of the head and the tail of the anode pole piece is reduced in the lithium supplementing process, the lithium precipitation phenomenon of the anode pole pi