How long is the life of the lithium-ion battery pack

How long is the life of the lithium-ion battery pack? Is it 300 times, 500 times, or 1000 times, usually. The life of lithium-ion batteries in groups is officially given as 300-500 cycles. Under normal working conditions, they can still be used outside the cycle. To that extent, the life of lithium-ion batteries is calculated. The end? How long is the life of the lithium-ion battery pack? Theoretically speaking, a ternary lithium-ion battery pack can generally have 2000 charge-discharge cycles, but if it is discharged for a long time with a large current, or often loses power, the battery’s service life will be reduced sharply, and we count it as one charge per day. It can also last for more than 5 years. In practical applications, the ternary lithium-ion battery pack can achieve 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 times (charge and discharge under standard conditions) in the specifications of their ternary battery cells. However, after the batteries are assembled into a battery pack, due to consistency issues, the most important factors are voltage and internal The resistance cannot be exactly the same, and its cycle life is about 400 times. The manufacturer recommends that the SOC use window is 10%~90%. Deep charging and discharging is not recommended, otherwise it will cause irreversible damage to the positive and negative structure of the battery. If it is calculated by shallow charge and shallow discharge, the cycle life will be at least 1000 times. In addition, if the ternary lithium-ion battery pack is frequently discharged in a high-rate and high-temperature environment, the battery life will be greatly reduced to less than 200 times. However, there is still a difference between actual use and theory. If 1000 charge-discharge cycles are performed, the ternary lithium-ion battery has actually attenuated by 50%, which means that a full charge can only run half of the original mileage. So how to prevent this? Charge as you use it, don’t charge it when you run out of power. In addition, an excellent battery management system can also slow down the attenuation of the ternary lithium-ion battery pack. Based on the actual situation of the car, if the battery can only perform 1000 charge and discharge cycles, it means that the ternary lithium-ion battery pack has attenuated by 50%, which means that it can only run half of the original mileage on a full charge. At present, it is believed that the nominal capacity of the battery at the end of life is 70%; because the battery attenuation is irreversible, the only thing that can be done is to change the battery. 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 post: The difference between lithium ion batteries and magnesium batteries