-Is ternary lithium battery safe and will it explode?

Is ternary lithium battery safe and will it explode?
author:enerbyte source:本站 click40 Release date: 2024-09-02 13:42:34
abstract:
Nowadays, people objectively have to choose between two technologies when purchasing new energy vehicles: lithium iron phosphate batteries and ternary lithium batteries. Industry insiders tell us that ternary series should be chosen for those who value endurance and vehicle lightweighting, while lit...

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Nowadays, people objectively have to choose between two technologies when purchasing new energy vehicles: lithium iron phosphate batteries and ternary lithium batteries. Industry insiders tell us that ternary series should be chosen for those who value endurance and vehicle lightweighting, while lithium iron phosphate series should be chosen for those who value safety. Consumers urgently hope that industry insiders can provide a practical answer from a technical perspective: Is lithium iron phosphate battery safe? This question needs to be answered from three aspects: material/structural stability, production process, and charge discharge characteristics.

1. Ternary lithium batteries are currently the safest positive electrode material for lithium-ion batteries, without any harmful heavy metal elements to the human body. Their olivine structure makes it difficult for oxygen to precipitate, which improves the stability of the material.

The production process of ternary lithium batteries is generally the same as other types of lithium batteries, with core processes including batching, coating, rolling, slicing, and winding. In the batching process, the conductivity of ternary lithium materials is relatively poor, so the particles are generally made smaller. The objective effect of this is that the internal arrangement is more uniform, which promotes the formation of a balanced voltage platform and can maintain the stability of the battery during operation.

3. Charging and discharging are the two basic working states of lithium batteries. When a ternary lithium battery is charged and discharged, due to the weak oxidation ability of iron ions, oxygen is not released, making it difficult to undergo redox reactions with the electrolyte. This makes the charging and discharging process of ternary lithium batteries in a safe environment. Not only that, ternary lithium batteries are also difficult to undergo severe redox reactions during high rate discharge and even overcharge discharge processes. At the same time, after lithium is deintercalated, the lattice change causes the final volume of the unit cell (the smallest constituent unit of the crystal) to shrink, which exactly offsets the increased volume of the carbon negative electrode during the reaction. Therefore, ternary lithium batteries can maintain the stability of their physical structure during charging and discharging, eliminating the hidden danger of battery explosion caused by volume increase.

The battery safety mentioned above is illustrated for convenience by using a single unit as an example. When put into use, ternary lithium batteries need to provide a rated voltage and capacity suitable for electrical appliances. At this time, it is necessary to carry out ternary lithium battery assembly work, that is, to equip single ternary lithium batteries into practical lithium battery packs through series/parallel/series parallel methods. The consistency of each individual battery should be taken into account in this assembly work. Usually, it also comes with a balanced management system that ensures the safety of lithium battery use through key parameter control, which is a common feature of various types of lithium battery packs.


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