What is the working principle of lithium-ion batteries?

The working principle of lithium battery Lithium battery is a kind of secondary battery (rechargeable battery), which mainly relies on the intercalation and deintercalation of lithium ions between the positive and negative electrodes to achieve energy storage and release. 1. During the charging process, the lithium ions are extracted from the positive electrode lattice under the drive of the electric field, pass through the electrolyte, and are inserted into the negative electrode lattice. At the beginning of charging, the voltage of the battery to be charged should be checked first. If the voltage is lower than 3V, pre-charge should be carried out first. The charging current is 1/10 of the set current, generally around 0.05C. After the voltage rises to 3V, it enters the standard charging process. The standard charging process is: constant current charging with the set current, when the battery voltage rises to 4.20V, change to constant voltage charging, and keep the charging voltage at 4.20V. At this time, the charging current gradually decreases, and when the current drops to 1/10 of the set charging current, charging ends. 2. The discharge process is just the opposite. Lithium ions return to the positive electrode, and electrons pass from the external circuit to the positive electrode to recombine with the lithium ions. When the battery is discharged, the electron e on the negative electrode runs from the external circuit to the positive electrode, and the positive lithium ion Li+ jumps from the negative electrode into the electrolyte, crawls through the winding hole in the diaphragm, swims to the positive electrode, and ran long ago. The coming electrons are combined together. The greater the discharge current of the lithium battery, the smaller the discharge capacity and the faster the voltage drop. 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: Which of the ternary lithium battery and the lithium iron phosphate battery is safer?