What are the basic characteristics of lithium batteries?

The discharge curve of the basic characteristics of lithium batteries, the higher the discharge rate, the lower the battery capacity, and the lower the temperature, the lower the battery capacity. Different discharge rates show different battery capacities. At higher discharge currents, the battery capacity does not reach the rated value, and the battery voltage drops significantly due to the internal resistance of the battery (C is the battery capacity, in Ah) . Cycle life The cycle number is the number of times a battery has been fully charged and discharged. It can be estimated from the actual discharge capacity and the planned capacity. Whenever the accumulated discharge capacity is equal to the planned capacity, the number of cycles is once. Generally, after 500 charge-discharge cycles, the capacity of a fully charged battery drops by 10% to 20%. Self-discharge rate The self-discharge of all batteries will increase as the temperature rises. Self-discharge is basically not a manufacturing defect, but the characteristics of the battery itself. However, improper handling in the manufacturing process can also cause the addition of self-discharge. Generally, the self-discharge rate doubles every time 10C is added to the battery temperature. The monthly self-discharge of lithium batteries is about 1.2%. Lithium battery maintenance The most important thing in the use of lithium batteries is to ensure that it will not be overcharged and discharged. These two behaviors can not correct its damage, and may even be dangerous, due to its internal data structure. If it is destroyed, any problems may show up. Therefore, the first thing to do in use is to add a maintenance circuit to it to ensure that excessive behavior will not occur. At present, there are many lithium battery maintenance ICs on the market, and their functions are the same, that is to complete over-current, over-voltage maintenance and over-charge, over-discharge maintenance statement: Some pictures and content of articles published on this site are from the Internet. Please contact to delete if there is any infringement Previous post: How to improve the safety index of power lithium battery packs?