What are the discharge methods for lithium batteries?

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. It can discharge at 1C5 current at room temperature for more than 54 minutes; 1.5C5 discharge time is more than 30 minutes; 2C5 discharge time is more than 23 minutes; and allowed to be short Discharge with a higher current. 3. The discharge process of lithium batteries is balanced during work. In theory, the discharge rate and depth of discharge should be paid attention to when discharging lithium batteries. 4. The depth of discharge is the ratio of the discharge capacity to the nominal capacity. The best reference indicator in practical use is voltage. The general standard for lithium battery discharge is: a lithium battery can be charged when it is discharged between 2.75V and 3V. Because less than 2.75V, the taboo overdischarge of rechargeable batteries is prone to occur. Overdischarge will cause excessive volatilization of the electrolyte, and the excessive reaction of the negative electrode of the lithium battery will cause the dielectric film to change, which will reduce the deintercalation capacity and form a permanent capacity. Sexual loss. 5. Lithium batteries also discharge when they are idle: one is the negative electrode drives lithium ions to re-embed in the positive electrode, and the other is the dissolution of the electrode. The discharge process of these two forms is reversible. Most of the lithium battery capacity lost during self-discharge can be compensated by charging; the discharge of lithium batteries is also related to the ambient temperature. Generally speaking, the monthly self-discharge at high temperatures The discharge rate is 10%, while the monthly loss is only 2~3% at room temperature. Lithium batteries are also not suitable for overdischarge, and overdischarge is also very bad for lithium batteries. Lithium batteries are very delicate, and they are much inferior to nickel batteries in terms of their ability to withstand charging and discharging, and bring additional dangers. Using the correct discharge method to discharge the lithium battery can make its service life longer. 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: How to extend the battery life of the lithium battery?