(1) Special solvents and binders are used to mix the powdered positive and negative electrode active materials with the pulping agent. After being stirred at high speed, the positive and negative electrode materials are made into a pulp.
(2) Coating: The prepared slurry is evenly coated on the surface of the metal foil, dried, and then made into positive and negative electrode sheets respectively.
(3) The positive electrode sheet, separator, negative electrode sheet and separator are arranged in the order from top to bottom, and then wound to form the battery core. After the electrolyte is injected and the battery is sealed, the battery assembly process is completed and the finished battery is produced.
(4) The finished batteries are charged and discharged using a dedicated lithium-ion battery charging and discharging equipment. Each battery is tested and qualified finished batteries are selected for shipment.
There are many types of lithium-ion battery processing and production equipment. Complete sets of equipment for producing battery materials (cells) can cost tens of millions of yuan, while complete sets of automated equipment for assembling lithium-ion battery packs can range from 20,000 yuan to several million yuan. You can choose according to your needs.
Lithium-ion battery processing equipment varies in configuration depending on the raw materials being processed, the required output from the user, and the compatibility with the user's existing factory and equipment. The price of a complete set of small-scale lithium-ion battery assembly and processing equipment ranges from several thousand to tens of thousands of yuan. Manufacturers cannot provide a quote without knowing the specifics of the equipment; for details, please contact the lithium-ion battery manufacturer's staff. Hope this helps.
Lithium-ion battery manufacturing process
The manufacturing process of lithium-ion batteries is relatively complex. Key processes include the electrode fabrication (stirring and coating stage, front-end), cell assembly (winding and liquid injection stage, mid-end), and formation, packaging, and testing stage (back-end). The value (purchase amount) breakdown is approximately (35-40%):(30-35)%:(30-35)%. Differences mainly arise from different equipment suppliers and varying import/domestic ratios. While the overall process flow is consistent, the value breakdown may vary but generally conforms to this ratio.
The key equipment used in the front-end processes of lithium battery production includes vacuum mixers, coating machines, and rolling mills; the key equipment in the mid-end processes includes die-cutting machines, winding machines, stacking machines, and liquid injection machines; and the key equipment in the back-end processes includes formation machines, capacity testing equipment, and automated process warehousing and logistics. In addition, battery pack production also requires automated pack manufacturing equipment.
The production process of lithium-ion batteries is not exactly the same for each manufacturer, but it generally involves these steps, which are as follows: material preparation, slurry coating, rolling, slitting, baking, winding into the shell, laser welding, baking, electrolyte injection, pre-charging, sealing, cleaning, aging, full inspection, warehousing, and shipping.
