Battery monomer, battery module and electric equipment

The utility model discloses a battery monomer, a battery module and electric equipment, the battery monomer comprises a shell and a first insulating film, the shell is provided with a bottom surface, a first side surface and a second side surface, and the bottom surface, the first side surface and the second side surface are arranged in an angular intersection manner; the first insulating film is provided with a first part and a second part, the first part is attached to the bottom surface and is provided with a first flange extending to the second side surface, and the second part is attached to the first side surface and is provided with a second flange extending to the second side surface; at least part of the first turned-over edge and at least part of the second turned-over edge are overlapped to form an overlapped section, and a containing groove is formed in the second side face to contain the overlapped section.