-Which is better than lithium iron phosphate or ternary lithium-ion batteries for assisting electric vehicles?

Which is better than lithium iron phosphate or ternary lithium-ion batteries for assisting electric vehicles?
author:enerbyte source:本站 click346 Release date: 2023-09-25 08:46:09
abstract:
Lithium iron phosphate batteries have two undeniable drawbacks: firstly, they have relatively low energy density, large weight, and large volume; The second is relatively sensitive to temperature, and in low temperature environments, the amount of charge will significantly decrease. Due to the...

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Lithium iron phosphate batteries have two undeniable drawbacks: firstly, they have relatively low energy density, large weight, and large volume; The second is relatively sensitive to temperature, and in low temperature environments, the amount of charge will significantly decrease. Due to the energy density not meeting the national requirement of 150 watt hours per kilogram, it is not suitable for large-scale use in passenger cars.

Ternary lithium-ion batteries are rapidly becoming widely used. Due to the policy guidance of the country in the field of passenger cars, energy density has been placed at a relatively high level, so various car companies are promoting or replacing ternary lithium-ion batteries. Even BYD, which had previously mastered the advantages of lithium iron phosphate technology, is gradually replacing the power lithium-ion batteries used in its models with ternary lithium. These models include Tang, Qin, and Teng Shi, among others. Although Tengshi, which currently uses ternary lithium-ion batteries, has not yet been launched for sale, there are reports that the next round of new products will use ternary lithium-ion batteries.

Including Japanese manufacturers' Accord and Camry hybrid versions, the latest models sold today also use ternary lithium-ion batteries. After using ternary lithium-ion batteries, due to significantly increased energy density, reduced battery volume, and reduced weight, more practical space is made available in the passenger compartment or trunk. So, overall, ternary lithium-ion batteries have more distinct advantages in the current policy environment.

In addition to battery life, charging is also a crucial aspect in the practical use of electric vehicles, and ternary lithium-ion batteries have significant advantages in charging efficiency compared to lithium iron phosphate batteries. When charging at temperatures below 10C, there is no clear difference in the constant current ratio between ternary lithium-ion batteries and lithium iron phosphate batteries. When charging at rates above 10C, the constant current ratio of lithium iron phosphate batteries rapidly decreases and the charging efficiency rapidly decreases.

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