Comparing the energy density of lithium iron phosphate batteries and ternary lithium batteries

The energy density of lithium iron phosphate batteries is far less than that of ternary lithium batteries, but its safety is generally considered to be better than ternary lithium batteries. Let's talk about energy density. At present, the subsidy standard for new energy vehicles depends on the energy density of the battery system. The specific policy is that when the energy density of the battery system exceeds 120Wh/kg, you can enjoy a subsidy of 1.1 times, and between 90Wh/kg and 120Wh/kg, you can only enjoy one -time subsidy.

It is understood that the current lithium iron phosphate battery on the market has not been difficult to achieve 90Wh / kg, but there are very few companies to achieve 120Wh / kg. BYD has been focusing on lithium iron phosphate battery, which is at the domestic leading level in this technology. It has been rumored that BYD has developed a high-energy density lithium iron phosphate battery with a capacity density of 150Wh/kg, which is equivalent to ternary lithium. The battery is almost equal. Whether the rumor is true or not is not discussed at present, but as the industry leader BYD can only achieve this level, it can be seen that the use of lithium iron phosphate battery to get 1.1 times subsidy is not difficult, but this problem for the ternary Lithium batteries are easy to achieve.

In addition, it can be seen from the capacity planning of several power batteries in 2017 that the capacity expansion of the ternary lithium battery is also particularly obvious. Even BYD, a company that loves lithium iron phosphate batteries in the past, maintains iron phosphate in 2017. Lithium production capacity remains unchanged and the expansion of ternary lithium batteries.

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