Video display of 32700 battery cell production process

Video display of 32700 battery cell production process
1. Material Preparation
Cathode Material: Common materials include lithium iron phosphate (LiFePO4), lithium nickel manganese cobalt oxide (NMC), or other suitable lithium-based compounds.
Anode Material: Typically, graphite is used, sometimes blended with silicon for improved performance.
Electrolyte: A lithium salt (like LiPF6) dissolved in an organic solvent is prepared for the electrolyte solution.
Separator: Polyethylene (PE) or polypropylene (PP) films that prevent the cathode and anode from short-circuiting.
2. Electrode Manufacturing
Mixing: Active materials, conductive agents (like carbon), and binders are mixed to form a slurry.
Coating: The slurry is coated onto a metal foil (aluminum for the cathode and copper for the anode) using slot-die coating or similar methods.
Drying: The coated electrodes are dried in an oven to remove solvents, leaving a solid layer of active material.
Calendering: The dried electrodes are compressed to improve density and ensure better performance.
3. Cell Assembly
Cutting: The electrodes are cut to the required size for the 32700 format.
Winding or Stacking: Electrodes and separators are wound together or stacked to form the cell structure.
Can Preparation: Metal cans (typically nickel-coated steel or aluminum) are prepared to house the cell components.
4. Electrolyte Filling
Injection: The electrolyte is injected into the cell assembly under controlled conditions to ensure uniform distribution and avoid contamination.
5. Sealing
Top Cap and Sealing: A cell cap is placed on top, and the cell is sealed using processes like laser welding to ensure airtight conditions.
6. Formation
Initial Charging: The cell undergoes an initial charging process, known as formation. During this step, the electrodes form a solid-electrolyte interface (SEI), which is critical for battery performance and longevity.
7. Testing and Quality Control
Electrical Testing: Cells are tested for various parameters, including capacity, internal resistance, and voltage stability.
Visual Inspection: Each cell undergoes a visual inspection to check for manufacturing defects.
8. Packaging
Grouping: Cells that pass quality control are grouped and packaged for shipment.
Labeling: Cells are labeled with performance specifications, production dates, and safety information.
9. Storage and Shipment
Safe Storage: Finished cells are stored in a controlled environment to prevent damage before shipment.
Transport: Batteries are shipped to customers, adhering to regulations regarding hazardous materials.
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