Battery Manufacturing Process
As the core of new energy, lithium battery production involves multiple precise processes. Here, we will provide a detailed introduction to the lithium battery production process.
China Lithium Battery Factory
Hongyitai Lithium Battery Manufacturing Process
Preparing of Raw Materials
Cathode Materials: Lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, etc.
Anode Materials: Graphite.
Electrolyte: Composed of organic solvents, lithium salts, and additives.
Separator: Made from polymer materials such as polyolefin.
Current Collector: Copper foil, aluminum foil, etc
Electrode Preparation
Coating: Evenly coat the cathode or anode active material, conductive agent, and binder.
Drying: Dry the coated electrodes to remove the solvent.
Rolling: Roll the electrodes to densify them and improve conductivity.
Cutting: Cut the electrodes to the required specifications.
Cell Assembly
Winding/Stacking: Wind or stack the cathode and anode electrodes and separator in a specific order.
Sealing: Place the wound or stacked electrodes into the cell casing and seal it.
Electrolyte Filling: Inject electrolyte into the cell.
Formation: Perform charge-discharge cycles on the cell to form a stable SEI film.
Module Assembly
Spot Welding: Connect multiple cells in series or parallel through spot welding.
Protection Board Welding: Weld the protection board onto the module to provide overcharge, over-discharge, and short-circuit protection.
Module Encapsulation: Encapsulate the module in a plastic or metal case.
Battery Pack Assembly
Module Connection: Connect multiple modules using connecting plates.
BMS Integration: Integrate the Battery Management System (BMS) into the battery pack for monitoring and management.
Enclosure Packaging: Encapsulate the battery pack in a sturdy enclosure.
Inspection and Testing
Appearance Check: Inspect the battery pack for any defects.
Performance Testing: Test the battery pack’s capacity, voltage, internal resistance, cycle life, and other performance indicators.
Safety Testing: Conduct safety tests for overcharging, over-discharging, short-circuiting, high temperature, and low temperature.
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