Do you know the charging process and principle of lithium-ion batteries?

Li-ion battery charging operation is divided into two stages. The first stage is constant current power charging. When the battery working voltage is less than 4.2V, the charger will charge with constant current power. The second stage is the constant current source charging link. When the battery working voltage reaches 4.2V, because of the characteristics of lithium-ion batteries, if the working voltage is higher, it will be destroyed. The charger fixes the working voltage at 4.2V, and the charging current is slowly reduced. When the amount of current decreases to a certain value (generally when the amount of current is set to 1/10), the charging power circuit will be blocked, the charging end indicator light will be on, and the charging end. Excessive charging and charging and discharging of lithium-ion batteries can cause permanent damage to the positive and negative stages. Overcharge and discharge cause the structure of the negative electrode carbon sheet to collapse, and the collapse will cause the appearance of positive lithium ions that cannot be penetrated during the entire charging process. Overcharging causes too many lithium ion positive ions to be placed in the carbon structure of the negative electrode, and part of the lithium ion positive ions are not released. The basic principle of lithium ion battery charging The principle of lithium ion positive ion battery refers to the basic principle of battery charging of lithium ion positive ion battery. When the battery is charged, lithium ion positive ions are caused on the positive level of the battery, and the lithium ion positive ions move to the negative level according to the electrolyte solution. As a negative stage, carbon has a lot of microporous plates, and the positive ions of lithium ions that reach the negative stage are placed in the microporous plates of the carbon layer. The greater the amount of lithium positive ions placed, the greater the charging volume. Similarly, when the battery is charged and discharged (that is, the entire process of applying the battery), the lithium ion positive ions placed in the negative carbon layer are released and moved back to the positive level. The more frequently the lithium ion positive ions return to the positive level, the larger the charge and discharge volume. Generally speaking, the battery capacity refers to the charge and discharge capacity. During the whole process of battery charging of lithium-ion positive-ion batteries, it is not too difficult for lithium-ion positive ions to move from positive to negative. Disclaimer: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact to delete.