After slitting the cathode roll, separator and anode roll, the winding process is to winding them by a fixed winding needle in sequence and extruding them into a cylindrical or square shape, then placing them inside a square or cylindrical metal shell. The size of the slitted rolls, the number of coils and other. The stacking process is to cut the cathode and anode sheets into the required size, then stack the cathode sheets, separator and anode sheets into small cell unit, and then stack the small cell. Pouch cell: Two technology are both adopted, it depends on the cell manufacturer. Blade cell: Designed and produced by stacking process. Prismatic cell: Both stacking and.