The charging and discharging cycle process of lithium batteries is a complex physical and chemical reaction process, and the cycle life is an important indicator to measure the quality of lithium batteries.

　　Below we analyze the factors that affect the cycle life of lithium batteries.

　　1. Design and manufacturing process

　　In the lithium battery design process, the choice of materials is the most important factor. The cycle performance of the material and electrolyte is good, and the cycle life of the lithium battery will be long.

　　2. Aging and decay of lithium battery materials

　　There are a large number of undesirable side chemical reactions during the cycle of lithium batteries.

　　3. Various conditions for charging and discharging during use

　　The size of the charge and discharge current, the selection of the charge and discharge cut-off voltage and the charge and discharge method used during the use of the lithium battery have a very important impact on the cycle life of the lithium-ion battery. Blindly increasing the working current of the lithium battery, increasing the charge cut-off voltage, lowering the discharge cut-off voltage, etc., will reduce the performance of the lithium battery.

　　4. Lithium battery use environment

　　The impact of the use environment of lithium batteries on its cycle life is also very important. The ambient temperature is a very important factor.

　　The working temperature suitable for lithium batteries is usually 0~40℃.

　　The charging and discharging performance of lithium-ion batteries at high temperatures is unstable, which will cause swelling and shorten the lifespan. The constant voltage charging time increases at low temperature, which is prone to lithium evolution, which will cause internal short circuit of the battery cell.

　　There are many factors that affect the cycle life of lithium batteries, and users must strictly follow the manufacturer's recommendations to use lithium batteries.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect substitute for lead-acid batteries and are the first choice in the energy storage industry.