How many times is the life cycle of a lithium battery?

How many life cycles does a lithium battery have? What is a ternary lithium battery? In nature, lithium is the lightest metal with the smallest atomic mass. Its relative atomic mass is 6.94g/mol, u003d 0.53g/cm3. Lithium is very active in chemistry and easily loses electrons and is oxidized into lithium ions. Therefore, the electrode potential is negative, -3.045V, and the electrochemical equivalent is the smallest, 0.26g/Ah. These characteristics of lithium determine that it is a material with a very high specific energy. The ternary lithium battery refers to a lithium secondary battery using three transition metal oxides as the positive electrode material. It fully integrates the good circulation function of lithium oxide, the high specific capacity of lithium nickelate, and the high safety and low cost of lithium manganate. It is a kind of lithium-ion rechargeable battery that is widely researched and applied. Ternary lithium battery life The so-called lithium battery life refers to the battery's capacity decay after a period of time, which is 70% of the nominal capacity (room temperature 25℃, standard atmospheric pressure, 0.2C discharge battery capacity), which can be considered as the end of battery life. . In the industry, the cycle life is generally calculated by the number of full cycles of lithium batteries. During the application process, an irreversible electrochemical reaction will occur inside the lithium battery, which will lead to a reduction in capacity, such as the decomposition of the electrolyte, the deactivation of the active material, and the collapse of the positive and negative electrode structure, which will lead to the reduction of lithium ions. The number of embedded and deembedded, etc. Experiments have shown that a higher discharge rate leads to a faster capacity decay. If the discharge current is lower, the battery voltage will be close to the equilibrium voltage and more energy can be released. How many life cycles does a lithium battery have? The theoretical life of a ternary lithium battery is about 800 times, which is considered medium among commercial rechargeable lithium batteries. Lithium iron phosphate has about 2,000 cycles, while lithium titanate is said to have 10,000 cycles. At present, mainstream battery manufacturers promise more than 500 times (under standard conditions of charging and discharging) in the specifications of their processed ternary batteries, but the cells are assembled into a battery pack, due to consistency issues, it is important that the voltage and internal resistance may be exactly the same , Its cycle life is about 400 times. The manufacturer recommends that the SOC application window is 10%~90%, and deep charging and discharging is not recommended, otherwise it will cause irreversible damage to the positive and negative structure of the battery. If calculated by light charging and light discharge, the cycle life is at least 1000 times. In addition, if the battery is continuously powered off under high power and high temperature, the battery life of the lithium battery will be significantly reduced to less than 200 times. Determine the life cycle time of the lithium battery according to the battery quality and battery data: 1. The number of ternary data cycles is about 800. 2. The cycle number of lithium iron phosphate battery is about 2500 times. The cycle times of genuine batteries and defective batteries are different. The cycle number of a genuine battery is designed and processed according to the cycle number in the battery manufacturer's manual, while the cycle number of a defective battery is sometimes less than 50 times. Ternary lithium battery functions: 1. High energy density Due to the use of a new generation of cell technology, while ensuring a long life, the energy density of the product has been increased to 151Wh/kg. 2. The energy density of high-power batteries is high, and the volume of the same battery can hold more energy. The battery capacity of some models is 53.6kwh, and the battery capacity of some models is 60.2kwh. The battery life is 1 minute, laying the foundation for long battery life. 3. The safe and reliable power lithium-ion battery has passed 30 national regulations and 52 company regulations before loading, including: overcharge, overdischarge, overtemperature, short circuit, shutdown, extrusion, fire, mechanical shock, imitation explosion , Salt spray and other strict inspection items. After the vehicle was installed, it passed a road test of more than one million kilometers under extreme conditions such as high temperature, cold, and plateau, fully verifying the reliability of the battery and the vehicle. 4. The activity of the adaptable ternary lithium battery will change under different working environments, which also leads to different charging efficiency in different working environments. Applying EMD3.0 skills, integrating multiple battery activity auxiliary functions, greatly improving the convenience of use Statement: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact and delete the previous article: Analysis of the quality of silicon wafers Impact on solar cell performance