How long is the battery life of an energy vehicle?

The power lithium-ion batteries currently used in automobiles are roughly divided into lead-acid batteries, lithium batteries, and nickel-hydrogen batteries. Among them, Ni-MH batteries are only used in Toyota vehicles and are not suitable as a separate power source; lead-acid batteries are mainly used in low-speed electric vehicles, which is the old-age scooter as the saying goes; lithium batteries are the most widely used electric vehicle power Lithium-ion batteries are divided into many types according to different materials. The more mature ones currently used are mainly divided into ternary lithium batteries and lithium iron phosphate batteries. Ternary lithium batteries and lithium iron phosphate batteries have different characteristics. Let me talk about the ternary lithium battery, which represents the Tesla model. It is characterized by high energy density, large capacity, good battery consistency, and mature processing technology under the same volume and weight. In theory, the cycle life of this type of battery is about 1500 times. In actual use, the full charge and discharge cycle is more than 800 times, and when the battery is discharged at 25%-75%, the actual use can reach more than 1200 times. Seeing this, some people may have doubts. If you charge it once a day and cycle 800 times, doesn't it mean that the battery will be gameover in less than 3 years? In fact, it is like this. A complete cycle means that the battery overflows with electricity and then uses up the electricity, which counts as a cycle. If it is charged from 100% to 75% every day, then 4 days can be regarded as a complete cycle, which means that the life span can reach 10 years. Based on the calculation of most ternary lithium battery electric vehicles with a range of 200 kilometers, a complete cycle can actually drive 180 kilometers, and 800 cycles can travel 144,000 kilometers. Counting the normal attenuation, 120,000 kilometers is no pressure. of. However, it can be used for 10 years at a usage frequency of 60 kilometers a day at work. If you pay attention to shallow charge and discharge, and maintain the battery well, 150,000 kilometers will basically overturn the life of a family car. That is to say, the battery has the same life as the car, and there is no need to change the battery during the entire cycle. The lithium iron phosphate battery is characterized by a long cycle life, which can reach more than 2000 cycles; a high charge-discharge rate, that is, a larger charge-discharge current; good safety, no problems with bending, puncture, and high temperature. The disadvantage is that the energy density is lower, and the battery with more cruising range is relatively new weight and car; the consistency is less, a better battery management system is needed; the low temperature attenuation is very clear, and the capacity will be reduced at 0°C About 10%, and the capacity will be reduced by about 30% at -20°C. In winter, the performance of the same car differs greatly between the south and the north. 2000 cycles are already surplus for electric vehicles. Even for Qin, which has a cruising range of only 70 kilometers, 2000 cycles can support Qin's pure electric vehicle to travel 140,000 kilometers, and there is no problem in overturning the entire service life. 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 working principle of lithium battery cathode materials and the analysis of factors affecting cathode materials