Battery monomer, battery and electric equipment

The utility model provides a battery monomer, a battery and electric equipment, the battery monomer comprises a shell, a plurality of electrode assemblies and a heat insulation piece, the shell is provided with a containing cavity, the plurality of electrode assemblies are contained in the containing cavity, the heat insulation piece is arranged between two adjacent electrode assemblies, the thickness H of the heat insulating member and the energy E of the electrode assembly satisfy the relationship: 25 Wh/mm < = E/H < = 750 Wh/mm. According to the battery monomer provided by the invention, the thickness H of the heat insulation part and the energy E of the electrode assemblies are limited to meet the relation: 25 Wh/mm < = E/H < = 750 Wh/mm, so that the heat insulation performance of the heat insulation part can meet the heat insulation requirement between the two adjacent electrode assemblies, the condition that the thickness H of the heat insulation part is too large can be effectively improved, the space occupied by the heat insulation part is effectively reduced, and the service life of the battery monomer is prolonged. Therefore, the space utilization rate of the single battery is effectively improved, and the volume energy density of the single battery is effectively improved.