What is the working principle of lithium batteries?

Lithium battery manufacturer's interpretation: Lithium battery working principle Lithium battery is the general name of battery with metal lithium as the negative electrode active material. It generally refers to a lithium battery, which cannot be cyclically charged, and is prone to explosion caused by dendrites, so it is rarely used For everyday electronic products. When a lithium battery is charged, Li+ in the positive electrode and Li+ in the electrolyte accumulate to the negative electrode to obtain electrons, which are reduced to Li and embedded in the carbon material of the negative electrode. During discharge, Li embedded in the carbon material of the negative electrode loses electrons and enters the electrolyte, and the Li+ in the electrolyte moves to the positive electrode. The working principle of lithium battery refers to its charging and discharging principle. When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte. The carbon as the negative electrode has a layered structure. It has many micropores. The lithium ions that reach the negative electrode are embedded in the micropores of the carbon layer. The more lithium ions are inserted, the higher the charging capacity. In the same way, when the battery is discharged (that is, when we use the battery), the lithium ions embedded in the carbon layer of the negative electrode are released and move back to the positive electrode. The more lithium ions returned to the positive electrode, the higher the discharge capacity. The battery capacity we usually call refers to the discharge capacity. Lithium battery charging principle The basic requirement of a lithium battery charger is a specific charging current and charging voltage, so as to ensure the safe charging of the battery. Other charging auxiliary functions are added to improve battery life and simplify the operation of the charger, including trickle charging for over-discharged batteries, battery voltage detection, input current limit, turn off the charger after charging is complete, and after the battery is partially discharged Automatically start charging, etc. Lithium storage batteries generally require the charging process to be controlled in four stages: trickle charging (low-voltage pre-charging), constant current charging, constant voltage charging, and charging termination. The charging method of lithium battery is limited voltage and constant current, which is controlled by IC chip. The typical charging method is: first detect the voltage of the battery to be charged, if the voltage is lower than 3V, pre-charge first, and the charging current is set 1/10 of the current, after the voltage rises to 3V, it enters the standard charging process. 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: What are the reasons for the price drop of lead-acid batteries and lithium batteries?