How to charge and discharge lithium batteries?

The correct charging method of lithium battery: (1) Standard 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 less than 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. (2) Fast 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 u003c0.01C5. 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 (error u003c0.5%), and it must be measured with a four-and-a-half-digit multimeter. Lithium 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 important for the calibration of battery capacity. (2) Fast discharge method: Because the internal resistance of the lithium battery is very small, large current discharge is allowed. 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 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: How long is the first charging time of the lithium battery pack for electric vehicles?