Service life of automotive ternary lithium battery
As we all know, the most common batteries for new energy vehicles are ternary lithium batteries and lithium iron phosphate batteries. However, we all know that daily vehicles will affect the service life of the battery and have capacity attenuation, and this attenuation phenomenon is basically irreversible in the whole process of battery recycling. So, let's take a look at the life of ternary lithium batteries.
First of all, let's take a look at the ternary lithium battery. The reason why it is widely used by many brands of electric vehicles is mainly because of its small volume and high energy density. Because the battery capacity of the battery pack is large, the distance traveled by the vehicle will be farther and the application will be wider. At the same time, we also know that temperature is an important factor affecting the service life of ternary lithium batteries. Too high or too low temperature will reduce the active lithium ion content, thus reducing the service life of ternary lithium batteries.
Secondly, while the ternary lithium battery brings advantages to new energy vehicles, it also has some disadvantages. The most typical one is that its service life is not ideal. In particular, continuous charging and discharging in the process of vehicle use, including some high temperature and high heat States, will cause irreversible chemical reactions in the ternary lithium battery, resulting in the destruction of the material structure of the positive and negative electrodes Loss of activity or decomposition of electrolyte, etc. Thus, the service life of the battery decreases continuously, and this attenuation is irreversible. Especially in the later stage of the car, even if the battery is fully charged, the mileage it can drive will be shorter and shorter.
In addition, the battery life is not expressed by time, but by the number of cycles. The number of cycles of lithium iron phosphate battery is about 2000, while the theoretical life of ternary lithium battery is about 800 cycles. Therefore, lithium iron phosphate battery has more advantages in cycle performance. If calculated according to the household scooter, the service life of a ternary lithium battery is only about 6-8 years.
It can be seen that the capacity attenuation of ternary lithium batteries is irreversible and its service life is not satisfactory. However, due to its own advantages, it is still widely used in major models. Therefore, consumers should try to avoid charging in a high or low-temperature environment after purchasing a car equipped with a ternary lithium battery. We should also pay attention to relevant precautions when using cars at ordinary times, which can prolong the service life of the battery.