Stacking is a key process in cell production where separated electrode sheets are arranged in a repeating cycle of anode, separator, cathode, and separator. Various stacking technologies exist, often patented by manufacturers, with Z-folding being a common method. In Z-folding, anode and cathode sheets are alternately inserted from opposite sides into a z-shaped folded separator, which is cut off after stacking. The completed cell stack is secured with adhesive tape to maintain alignment. Precise positioning of individual sheets is crucial for quality, typically achieved using vacuum grippers. Depending on the cell design, a stack can consist of up to 120 individual layers.