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The lifespan of a ternary lithium-ion battery is 2000 charging and discharging cycles, which can be calculated as one charge per day and can last for over 5 years. However, there is still a difference between actual use and theory. If 1000 charging and discharging cycles are conducted, the ternary lithium-ion battery has actually decayed by 50%, which means that fully charged can only run half of the original mileage. In addition, excellent lithium-ion Battery management system can also slow down the attenuation of ternary lithium-ion batteries.

The lifespan of a ternary lithium-ion battery refers to the capacity decay of the battery to 70% of its nominal capacity after a period of use, which can be considered as the end of its lifespan. The first year of acquisition of electric vehicles has a significant decline, usually around 8%; Over the next 2-3 years, it will decay by 4%; The attenuation gradually slows down during the 5-6 years of continued use, usually only 1%.

The essence of affecting the capacity attenuation of ternary lithium-ion battery packs is the reduction of the content of removable lithium ions, which is mainly due to the structural damage or deactivation of positive and negative electrode materials, electrolyte decomposition, and abuse of lithium-ion batteries. The battery charging and discharging process is a complex electrochemical process, and the factors leading to the battery capacity decline are not single, and the deterioration of one aspect may lead to other factors to jointly affect the battery capacity, cycle performance, energy density, etc.

In terms of lithium-ion battery attenuation, lithium-ion battery manufacturers have also given a 20% limit value. If the attenuation exceeds this value during the warranty period, corresponding replacement services will be provided. As is well known, battery attenuation directly affects the daily car experience of car owners. Next, let's talk about the issue of attenuation value.

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