Detailed lithium-ion battery life

How many times is the life cycle of a lithium-ion battery? With the promotion of energy conservation and environmental protection in society, more and more environmentally friendly products are applied to the market. In the battery industry, lithium-ion batteries quickly occupied the market by virtue of their numerous advantages, and gradually replaced traditional lead-acid batteries. Regarding traditional batteries, lithium-ion batteries have the advantages of long life, energy saving, environmental protection, pollution-free, low maintenance costs, complete charge and discharge, and light weight. In general, lithium-ion batteries have long lifespan, to what extent? How long is the life of a lithium-ion battery? The so-called lithium-ion battery life means that the capacity of the battery decays to 70% of the nominal capacity (the battery capacity at room temperature 25℃, standard atmospheric pressure, and 0.2C discharge) after a period of use. Think that life ends. In the industry, the cycle life is generally calculated by the number of cycles of fully charged and discharged lithium-ion batteries. In the process of use, an irreversible electrochemical reaction occurs inside the lithium-ion battery, which leads to a decrease in capacity, such as the decomposition of the electrolyte, the deactivation of active materials, and the collapse of the positive and negative electrode structure leads to a reduction in the number of lithium ions intercalation and deintercalation. Wait. Experiments show that a higher rate of discharge will lead to a faster attenuation of capacity. If the discharge current is lower, the battery voltage will be close to the equilibrium voltage, which can release more energy. The theoretical life of lithium-ion batteries is about 800 cycles, which is medium among commercial rechargeable lithium-ion batteries. Lithium iron phosphate is about 2,000 cycles, while lithium titanate is said to be able to reach 10,000 cycles. At present, mainstream battery manufacturers promise more than 500 cycles in their battery cell specifications, but after the batteries are assembled into a battery pack, due to consistency issues, it is important that the voltage and internal resistance cannot be exactly the same, and its cycle life About 400 times. Xi'an Huamai has been manufacturing lithium-ion battery packs for a long time. Lithium-ion battery life The number of life cycles of lithium-ion batteries is determined according to the battery quality and battery materials: 1. The number of cycles of ternary materials is about 800. 2. The cycle times of lithium iron phosphate battery are about 2500 times. 3. There is a difference between the cycle times of genuine batteries and defective batteries. Genuine batteries are designed and produced according to the cycle number in the battery manufacturer's specifications, while the cycle times of defective batteries may sometimes be less than 50 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: Frequently Asked Questions and Answers about Lithium-ion Battery Electric Vehicles