Box body, box body assembly, battery and electric equipment

The invention provides a box body, a box body assembly, a battery and electric equipment, and relates to the technical field of batteries. The box body comprises a box body and a mounting structure; the box body is provided with an opening and an end wall which are oppositely arranged; the mounting structure is arranged on the end wall, the mounting structure is overlapped with the end wall when observed in the thickness direction of the end wall, and the mounting structure is used for connecting the box body and the equipment. The mounting structure is arranged on the end wall of the box body, so that the size of the part, extending to the lateral direction of the box body, of the mounting structure can be reduced or the mounting structure is prevented from extending to the lateral direction of the box body, and therefore the situation that the mounting structure occupies the lateral external space of the box body is reduced or the situation that the mounting structure occupies the lateral external space of the box body is avoided; by increasing the size of the internal space of the box body along the lateral direction, the space originally occupied by the hanging structure in the lateral direction of the box body is used for accommodating the battery monomers, so that the energy density and the grouping efficiency of the battery with the box body are favorably improved.