Packaging film, battery monomer, battery and electric device

The utility model relates to a packaging film, a battery monomer, a battery and a power utilization device, in the packaging process of the battery monomer, a coating layer coats the surface of an electrode assembly, and electrolyte is injected into the battery monomer. The coating layer is provided with a plurality of adsorption parts, so that part of electrolyte can be stored in the adsorption parts in the electrolyte injection process. Along with the charge-discharge cycle of the battery monomer, the electrode assembly expands and deforms, and the adsorption part is extruded along the thickness direction of the coating layer, so that the electrolyte in the adsorption part is discharged towards one side of the electrode assembly. And at least part of the adsorption part is distributed close to the top of the electrode assembly, so that the discharged electrolyte can be timely supplemented and infiltrate the top of the electrode assembly, and the problem of insufficient infiltration caused by the fact that t