What is the manufacturing process of lithium batteries?

　　Lithium battery production process: (positive and negative) dry mixing → wet mixing → rolling paste on the conductive substrate → 3-step drying → winding → trimming (cut to a certain width) → rolling → winding (standby) ) Dry mixing adopts ball mill, and the grinding ball is glass ball or zirconia ceramic ball.

　　(Positive and negative electrode) dry mixing→wet mixing→rolling paste on the conductive substrate→three-step drying→winding→trimming (cut to a certain width)→rolling→winding (standby) dry mixing using ball milling, grinding The balls are glass balls or zirconia ceramic balls;

　　Wet mix use. The planetary powder mixer, the blades are installed on 2-3 shafts, and the mixing effect is better. The amount of solvent in the wet mixing should be appropriate to form a proper rheological state to obtain a smooth coating. Roll-coated electrode paste must ensure a certain viscosity. The paste is applied to both sides of aluminum foil or copper foil, and the thickness of the coating depends on the battery model. Then it passes through 3 heating zones for drying. NMP (or water) volatilizes from the coating with the flow of hot air or dry nitrogen, and the solvent can be recycled and reused. Rolling is to increase the density of the coating and to make the electrode thickness meet the size of the battery assembly. The pressure in the rolling stage should be moderate to prevent the powder from scattering during winding.

　　Cylindrical battery assembly process: insulating bottom ring into the barrel → winding the cell into the barrel → inserting the mandrel → welding the negative current collector to the steel barrel → inserting the insulating ring → rolling the steel barrel → vacuum drying → liquid injection → combined cap (PTC components, etc.) Weld to the positive electrode lead→sealing→X-ray inspection→number→formation→circulation→ageing.

　　Square battery assembly process: insulating bottom into the steel box → sheet-shaped combined cell into the barrel → negative current collector welded to the steel box → upper sealing gasket → positive current collector welded to the pole lead → combined cover (PTC components, etc.) Weld to the screw lead → position the combined cover → laser welding → vacuum drying → liquid injection → sealing → X-ray inspection → numbering → formation → circulation → aging.