Overview

Lithium-ion cell manufacturing runs through two parallel electrode lines (anode and cathode) that converge at assembly. Each electrode is made by mixing active material into a slurry, coating it onto a metal foil, drying it, compressing it (calendaring), and slitting it to width. The two electrodes are then wound or stacked with a separator, sealed into a case, filled with electrolyte, and electrically activated (formation) before final testing. Quality decisions made early — in the slurry and coating stages — carry through every downstream step.