Do you know the uses of lithium battery aging process?

The packaging process of lithium batteries is roughly divided into winding, shelling, welding and other processes according to different battery specifications. The liquid injection process after the assembly is completed includes liquid injection and sealing. The last is the three-step process of battery formation, aging and capacity separation. The lithium battery manufacturing process can be roughly divided into three stages, the first-stage battery cell manufacturing, the middle-stage assembly, and the later-stage battery activation. The activation stage of the battery includes battery aging. Aging generally refers to the placement of the lithium battery after the first charging and forming after the liquid injection is completed. It can be aging at room temperature or high temperature. The purpose of both is to make the properties and composition of the SEI film formed after the initial charging and forming more stable. Ensure the stability of the electrochemical performance of the battery. There are three main purposes for aging: 1. After the lithium battery undergoes a pre-forming process, a certain amount of SEI film will be formed on the graphite negative electrode inside the battery, but this film has a compact structure and small pores. If the lithium battery is aged at high temperature, there will Helps SEI reorganization to form a loose and porous membrane. 2. After formation, the voltage of the lithium battery is in an unstable stage, and its voltage is slightly higher than the true voltage. The purpose of aging is to make its voltage more accurate and stable. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Analysis of the difference between lithium batteries and lead-acid batteries