About the correct charging and discharging of lithium-ion batteries

Correct charging method for lithium-ion battery: ⑴Standard charging method: charge with 0.2C5 constant current until the battery terminal voltage is 4.20V, change to constant voltage charging, and the charging current is 0.01C5, which is regarded as full. The standard charging method is often used to calibrate the battery capacity. Because the charging is too slow, it is rarely used in daily use. ⑵Fast charging method: Charge with 1C5 constant current until the battery terminal voltage is 4.20V, change to constant current charging, until the charging current is 0.01C5. Precautions for fast charging method: ①The initial charging current should not be too large, so as to prevent the battery from overheating, leaking, and bursting. ②When the battery terminal voltage reaches 4.20V, it must be switched to constant voltage immediately. The voltage requirement is relatively high (the error is 0.5%), and it must be measured with a four-and-a-half-digit multimeter. Li-ion battery discharge method: (1) Standard discharge method: discharge at a constant current of 0.2C5 until the battery terminal voltage is 2.75V. Because it is difficult to meet this condition in daily use, it is of little significance. This method is mainly used for the calibration of battery capacity. ⑵Quick discharge method: Because the internal resistance of lithium ion battery is very small, it allows high current discharge. At room temperature, it can discharge at 1C5 current for more than 54 minutes (above 90%); 1.5C5 discharge time is more than 30 minutes; 2C5 discharge time More than 23 minutes; and allow a short-term larger current discharge. 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 article: What changes will moisture cause to lithium-ion batteries?