What is the use of lithium-ion battery pack formation and capacity division?

What is the use of lithium-ion battery pack formation? The chemical achievement is that after the lithium-ion battery pack has just been produced, it is charged once to activate the battery. Its use is similar to the formatting of a floppy disk. After the formation is completed, the battery can start normal charging and discharging. The principle is simply to charge the battery for the first time to activate the active material in the battery and at the same time generate a dense film on the surface of the anode to protect the entire chemical interface. The formation temperature of the formation process of lithium-ion batteries is mainly affected by the viscosity and conductivity of the electrolyte and the ion diffusion speed of the electrode material, which affects the formation effect. Generally, the higher the formation temperature, the lower the viscosity of the electrolyte, the higher the conductivity of the electrolyte, and the faster the ion diffusion rate of the electrode material. Therefore, the smaller the polarization, the better the formation effect. After formation, the voltage of the battery is in an unstable stage, and its voltage is slightly higher than the real voltage. The purpose of aging is to make its voltage more accurate and stable. What is the use of lithium-ion battery component capacity? Lithium-ion battery component capacity: a simple understanding is capacity sorting, performance screening and grading. Battery sub-capacity is to determine the capacity of the lithium-ion battery pack by charging and discharging the battery and detecting the discharge capacity when the sub-capacity is fully charged. The capacity of lithium-ion batteries is managed by the computer to obtain the data of each detection point, so as to analyze the size and internal resistance of the battery and determine the quality level of the battery. This process is the capacity division. The produced lithium batteries cannot be sold immediately. They should be stored in the warehouse for at least 15 days. During this period, some inherent ills are manifested, such as excessive self-discharge, etc., batteries that have reached the shelf life in the warehouse After receiving the order, take it out and test again and divide the capacity again, that is, charge and discharge again, eliminate the capacity that is not up to the level or the quality problem, and then hand over to the sales department to maintain about 50% of the power. In the hands of the cell phone battery block assembly plant. The batteries that will be used in the assembly of lithium-ion batteries are converted into machine-differentiated batteries again. Through this process, some batteries that do not meet the requirements can always be picked out and returned to the battery factory. After passing the lithium-ion battery inspection mechanical test, it can be seen that the battery cell is charged and discharged again, and it is charged. Therefore, it is normal that there are two bars of electricity when the battery is received. Each channel of the lithium-ion battery pack can be started and stopped at a single point, and the reaction speed is fast. Each channel has independent constant current source and constant voltage source, real-time sampling of current and voltage, constant current to constant voltage continuous switching without disturbance. Can be used for cycle life test. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Detailed explanation of the reasons for the capacity decline of ternary materials lithium-ion battery packs