Battery monomer, battery assembly and electric equipment

The utility model relates to the technical field of power batteries, in particular to a battery monomer, a battery assembly and electric equipment. The single battery comprises a shell and an electrode assembly, the shell comprises a cylindrical side wall and two end walls used for sealing the two ends of the cylindrical side wall, the cylindrical side wall comprises a cylindrical first side wall and a cylindrical second side wall arranged on the outer side of the first side wall in a sleeving mode at intervals, and the end wall is provided with a first edge and a second edge which are oppositely arranged at intervals and extend in the circumferential direction; the first edge is connected to the first side wall, the second edge is connected to the second side wall, the first side wall, the second side wall and the two end walls define a containing cavity, and the electrode assembly is located in the containing cavity; the first side wall is internally provided with a heat exchange flow channel allowing heat