EV battery Manufacturing Processes and Contamination Control EV battery manufacturing processes are complex, sensitive, and delicate, in a multi-stage sequence with mixing, pumping, coating, injection, calendering, ageing and assembly operations.
EV battery contaminants include moisture, particles and static, chemical and electrical fire and safety risks. Therefore, robotics and automation are extensively used to provide both product component protection and personal safety. Typically, there are 4 processes to EV battery manufacturing. The following process steps are indicative of a typical battery, chemistries, and technologies. These process steps are carried out in multiple and different, interconnected dry cleanrooms and storage areas, within the overall EV battery manufacturing facility. Electrode Manufacturing Raw materials are combined to produce a slurry material. This is coated onto a metallic substrate producing individual anode and cathode electrodes. The anode and cathode materials must be separate, always, to prevent contamination. Cell Assembly (Cylindrical/Pouch) The electrodes are brought together but separated by a ‘separator’. The electrolyte solution is injected into the cell.
Formation, Ageing & Testing During the formation process, the cell receives it’s first electrical charge. A process of charging & discharging forms a protective layer on the electrodes. This protects the active material from the electrolyte solution. Module Assembly Individual cells are mechanically connected to form the battery module.
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