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 an insulating film, the shell is provided with a first surface, a second surface and a third surface, and the first surface, the second surface and the third surface are arranged in an angular intersection manner; the insulating film is provided with a first part attached to the first surface and a second part attached to the second surface, the first part is provided with a first turnup extending to the third surface, the second part is provided with a second turnup extending to the third surface, and the first turnup and the second turnup form an overlapped part and a non-overlapped part on the third surface; the maximum thickness of the non-overlapped part is H. The overlapped part and the non-overlapped part are both attached to the third face. Under the condition that the overlapped part has two overlapped layers, the height difference between the overlapped part and the non-overlapped part is smaller than H; when the overlapping portion has at least three overlapping layers, the height difference between the overlapping portion and the non-overlapping portion is less than 2H.