The first step: the preparation of electrode suspension mainly involves mixing electrode active materials, binders, solvents, etc. together, then stir and disperse carefully to form a suspension. The second step: cover the electrode prepared in the first step. The paste is evenly applied to the current collector (aluminum foil or copper foil, etc.) with a specified thickness, and the solvent is dried. Step 3 – Punching the Pole Piece Cut the pole piece made in the previous step to the specified size. and form. Step 4: Laminate the positive and negative electrode sheets and separators together. After finishing gluing, form the polar core. Step 5: Assemble the soft battery. Place the polar core produced in the previous step. aluminum-plastic film which has been perforated and complete the top seal, side seal, etc. (leave a mouth for'liquid injection) to form a flexible battery which has not been filled with liquid. specified amount of electrolyte in the soft battery cell (Of course, the battery core should be baked and filled with liquid in a low humidity environment. Excessive moisture content is not good.) Step 7 - The battery is sealed in a vacuum environment to extract the gas inside the battery core and complete the sealing. What is the production process of lithium batteries?
Sodium carboxymethylcellulose, polyvinylidene fluoride and copper N-methylpyrrolidine in the slurry to make lithium batteries contain toxins, but when mixing the slurry to make a lithium battery, they are all in sealed mixing container and the finished slurry basically there is no volatile gases, so it can be said to be non-toxic, but if it is imported directly, itis another story.
The process technology of lithium-ion batteries is very strict and complex. We can only briefly present some of the main processes here. (1) Special solvents and binders are used for mixing sludge with powder positive and negative electrode active materials respectively, and after high-speed uniform mixing, sludge-type positive and negative electrode materials are made. (2) Coating film: Apply the prepared suspension evenly to the surface of the metal foil, dry it, and make positive and negative electrode plates respectively. (3) The assembly is placed in the order positive electrode sheet - separator - negative electrode sheet - separator from top to bottom, and is rolled to form the battery pole core. Then the battery is completed by electrolyte injection, sealing and others. process. The pThe assembly process creates the finished battery. (4) The chemical industry uses special battery charging and discharging equipment to carry out charging and discharging tests on finished batteries, inspect each battery, and select qualified finished batteries before leaving the factory.
Lithium battery production --- coating machine
Lithium battery assembly equipment