Ternary lithium battery or lithium iron phosphate battery for the same price? Generally preferred ternary lithium, can have better range and low temperature resistance characteristics, but under normal circumstances will not have such a choice, because lithium iron phosphate and ternary lithium manufacturing costs there is a certain gap, in general, in high with the electric car models with ternary lithium battery, low with the electric car with lithium iron phosphate. The following article explains the difference between ternary lithium batteries and lithium iron phosphate batteries.

1, ternary lithium high energy density

Ternary lithium energy density is generally 180-230Wh/kg, and high nickel ternary lithium battery is easy to reach 250Wh/kg, but high nickel will increase battery instability. The energy density of lithium iron phosphate is generally 140-160 Wh/kg, the highest or up to 180 Wh/kg. blade battery is also a lithium iron phosphate, such as the first generation of blade battery energy density of 140 Wh/kg, the second generation or to achieve 180 Wh/kg.

To be precise, the battery energy density is divided into weight energy density and volume energy density, the former is what we often talk about, the latter is less attention, but as important. Such as the blade battery structure innovation, volume energy density from 251Wh / L to 320Wh / L, although the weight energy density is not high, but the range to catch up with the ternary lithium.

2, ternary lithium is more resistant to low temperature

Lithium battery will become weak chicken in low temperature, lithium iron phosphate low temperature limit value is generally -20 ℃, lithium ternary can withstand -30 ℃ low temperature, and 0 to -20 ℃, lithium battery attenuation of about 10%-30%, and lithium ternary attenuation degree is generally 10% lower than lithium iron phosphate. At present, many car companies and battery manufacturers are developing more advanced thermal management technology, as a way to improve the low-temperature performance of power batteries.

3, lithium iron phosphate longer life

Ternary lithium battery charge and discharge cycle times are generally 2000 times, while lithium iron phosphate is generally 3000, ternary lithium 1.5 times. Battery life will not be expressed in years, but using the number of charge and discharge cycles for yi old, such as 2000 times, that is, after 2000 charge and discharge cycles battery attenuation of less than 20%. That is, after 2000 cycles, the battery capacity is equivalent to only 80% left, continue to use or continue to continuously decay.

4, lithium iron phosphate is safer

Through the needling test, the traditional lithium iron phosphate battery without open flame, smoke, the surface temperature reached 200 ℃ ~ 400 ℃, while the ternary lithium needling instantly appeared after the temperature rise of more than 500 degrees, and began to burn violently.

5, lithium iron phosphate cost less