Comparison between lithium iron phosphate battery and ternary lithium battery

　　At present, new energy vehicles are basically equipped with ternary lithium batteries or lithium iron phosphate batteries. From the perspective of battery materials, there is no problem with these two types of batteries. Taking the service life of ternary lithium battery as an example, the cycle life of ternary lithium battery in actual use is generally 1200~1500 times. If the battery power is 100% to 75% used every day, the battery power is full, and a complete cycle is calculated in 5 days, then the service life of the ternary lithium battery can reach more than 10 years. Considering the normal attenuation, even if you run 150000 km on the road, there is almost no pressure, which is better than lithium iron phosphate battery. So why do automobile companies choose lithium iron phosphate battery? In fact, compared with lithium iron phosphate battery, ternary lithium battery also has the biggest advantage of high battery energy density. Generally speaking, the same model equipped with ternary lithium battery runs farther than the model using lithium iron phosphate under the unit volume. However, for safety reasons, due to the unstable characteristics of ternary lithium batteries, a large number of battery safety tests need to be carried out. At the same time, it is also necessary to consider whether the battery pack will leak. Therefore, the cost of ternary lithium battery is also increased. Low cost and high stability are the greatest advantages of lithium iron phosphate battery. We can see that the recently popular Wuling Hongguang micro electric vehicles, Lingbao Box and other micro pure electric scooters all use lithium iron phosphate batteries, which also makes the price of these vehicles less than 50000 yuan. Compared with Euler black cat and SAIC kelawei, which also use ternary lithium battery, although the mileage is reduced, it brings higher cost performance. In the Ningde era, BYD was one of the few leading enterprises in the domestic power battery market. However, due to the state subsidies, the energy density of lithium iron phosphate batteries was low, which could not meet the needs of the state subsidies. Therefore, ternary lithium batteries have gradually become the mainstream of the late market. After the cancellation of the national new energy vehicle subsidy, automobile enterprises no longer blindly pursue the energy density ratio of the power battery pack, but take into account the safety and cost of the power battery pack in many aspects, which also makes many battery suppliers begin to pay attention to lithium iron phosphate batteries.

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