Battery monomer, battery and electric device

The utility model relates to a battery monomer, a battery and a power utilization device. The single battery comprises a shell, an end cover and an electrode assembly, the shell is provided with an opening, the end cover covers the opening, the end cover and the shell define a containing cavity, and the electrode assembly is contained in the containing cavity. A protruding part is arranged on the side, facing the containing cavity, of the end cover, and the protruding part limits the end, facing the end cover, of the contact electrode assembly and can absorb the electrolyte in the containing cavity. The protruding part is arranged on the side, facing the containing cavity, of the end cover, the protruding part makes contact with the electrode assembly, the arrangement of the protruding part can increase the path for the electrolyte to infiltrate the electrode assembly, the infiltrating effect and the infiltrating speed of the electrolyte on the electrode assembly are improved, and the situation that the perfo