Brief introduction to the key processing technology of lithium battery

The key processing technology of lithium battery 1. Stirring can also be called mixing, homogenization, pulping, batching and so on. Through certain feeding sequence, stirring process, vacuum control, temperature control and other conditions, the key components such as positive and negative active materials, conductive agents, binders, and solvents are prepared into a process with certain viscosity requirements. The properties of the slurry to be controlled are that it has good fluidity, and the viscosity and particle size meet the coating requirements. 2. Coating Coating is the process of evenly coating the stirred slurry on the current collector and drying it to form pole pieces. Coating methods include continuous coating and intermittent coating. Lithium battery slurry coating methods mainly include doctor blade direct coating, doctor roller coating, and slot extrusion coating. The control parameters of the coated product are areal density, cohesiveness, and moisture content. 3. Rolling Rolling refers to the process of passing the coated product through two steel rolls under a certain gap and under a certain pressure to compact the pole piece to a specified thickness. The purpose of rolling is to further compact the loose and porous electrodes, reduce the contact resistance between substances, increase the battery capacity within a certain battery volume, and not overpressure to ensure the electrolyte's infiltration effect on the pole pieces. 4. Slitting and slitting is also called slitting. The width of the coated pole piece is large, and the pole piece should be divided into multiple strips. Slitting products are critically affected by the quality of the cutter, the angle of the cutter, and the tension. 5. Tab forming is a process in which the pole piece is cut by the engagement between the upper and lower die of the control equipment, so that the pole piece is formed into a tab according to the design size requirements. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.