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Brief analysis of new energy vehicle batteries: ternary lithium battery and lithium iron phosphate battery

August 20, 2022

There are many types of new energy, but the closest thing to our lives is electricity, hydrogen fuel, and so on. So our content will also be built around them. Below, we mainly talk about battery knowledge.

There are many types of batteries, and the most widely used ones are lithium-ion batteries. But there is also a special case, that is, Toyota's hybrid model, which uses nickel-metal hydride batteries, the benefits are low cost, but the performance is weak. In other words, if Corolla uses a lithium-ion battery, it is not the money.

Tesla is a representative model of ternary lithium battery

Lithium-ion batteries can be divided into two types at present, one is a ternary lithium battery, and the other is a lithium iron phosphate battery. The representative model of the former is the Tesla Model S. This naming method is named after the positive electrode material of the battery, and refers to a lithium battery using a nickel-cobalt-manganese ternary positive electrode material for the positive electrode material, referred to as a ternary lithium battery.

Tengshi is a representative model of lithium iron phosphate battery

Lithium iron phosphate battery, the representative model is part of BYD's car. So what are the advantages and disadvantages of lithium iron phosphate battery compared with ternary lithium battery?

The advantage is that the safety of lithium iron phosphate battery is currently considered to be higher than that of ternary lithium battery, ternary lithium battery. When its temperature is 250-350 °C, the internal chemical composition begins to decompose, while the lithium iron phosphate battery is the battery temperature. At 500-600 ° C, its internal chemical composition begins to decompose.

So what are the disadvantages? Relatively speaking, the energy density is lower. Simply put, the same weight of the battery, the ternary lithium battery can provide longer battery life.

Not long ago, the ternary lithium battery was stopped on a commercial vehicle because of the so-called "security problem." It’s not safe, I think it’s mainly about the battery management system, not the battery itself. We all know that the main manufacturers of ternary lithium batteries are Japanese and Korean companies such as Panasonic, Sanyo, Samsung, LG, and the manufacturers of lithium iron phosphate battery are domestic enterprises. Therefore, it is not excluded because some protectionism caused the call to stop.

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