Several factors affecting the cycle life of lithium batteries

First of all, the environmental temperature factor, the ambient temperature of the battery operation is an important factor affecting its life, and it is also the most obvious factor. Generally speaking, the most suitable ambient temperature for using batteries is between 20-25°C. The impact of ambient temperature on battery life is important to the current impact of ambient temperature on battery life, which in turn affects battery life by affecting battery capacity. The decrease in battery capacity will cause the battery under a specific charging voltage to be in an overcharged state. With the excessive accumulation of power in the battery, the corrosion rate of the grid in the battery will accelerate, and the generation and escape of hydrogen will also be accelerated. Under this condition, the moisture of the battery will gradually decrease, and it will be in a loss over time. The state of water, which shortens the life of the battery. Secondly, the charging voltage factor and the length of the battery's service life have a great relationship with the charging voltage. In order to ensure the storage of batteries, they are generally in a floating state for a long time during normal operation. In this long-term charging state, once the charging voltage is set too high, it is easy to cause gas in the battery. , To speed up the loss of electrolyte, thereby shortening the service life of the battery; at the same time, it also causes excessive heat to accumulate inside the battery, causing the battery temperature to rise, and then causing thermal runaway. Thirdly, the factor of depth of discharge, the impact of depth of discharge on battery life is important from two aspects: First, from the impact of discharge rate and discharge current multiple on battery capacity, discharge rate and discharge current multiple have an impact on battery capacity. The reason for the impact is that the lead sulfate crystals formed under low current conditions are difficult to be oxidized and reduced, and their particles are relatively large. If they are not cleaned in time, they will affect the capacity of the battery, and then affect the life of the battery; Second, from the perspective of depth of discharge, depth of discharge u003d actual discharge capacity/rated discharge capacity, where actual discharge capacity and rated discharge capacity are at the same discharge rate. Generally speaking, when the discharge depth of a party battery is 20% , Its service life is about 2000 times, and when its depth of discharge is full discharge, its cycle life is only 350 times. 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: Compared with 18650 batteries, what are the characteristics of polymer batteries