Battery monomer, battery and electric device

The invention provides a battery monomer, a battery and a power utilization device. The battery monomer comprises a shell, electrolyte and a cooling structure, a containing cavity is formed in the shell, and the containing cavity is filled with the electrolyte. And the cooling structure is at least partially positioned in the accommodating cavity, is immersed in the electrolyte and is used for cooling the interior of the battery monomer. Therefore, the cooling structure is arranged in the accommodating cavity, so that the cooling structure is closer to a heating source in the battery monomer, and the quantity of heat transfer media between the cooling structure and the heating source is reduced. Meanwhile, at least part of the cooling structure is immersed in the electrolyte, and the electrolyte is directly cooled; by utilizing the wettability of the electrolyte, effective heat transfer is realized on the internal structure of the battery monomer, the internal heat transfer efficiency of the battery monomer is improved, the cooling effect is improved, and the risk of thermal runaway of the battery monomer is reduced.