In 2001, the field of new energy electric vehicles in China began to develop. After decades of scientific and technological progress, many difficulties have been overcome. China's new energy vehicles continue to develop and its technical strength continues to improve. On the basis of independent structural innovation, the head charging battery can improve the volume utilization rate of the battery, and ultimately achieve the overall goal of designing a large number of lithium-ion batteries in the same indoor space. In China, the new energy automobile industry chain has independent patent rights for technology production and manufacturing management system and quality supervision and management system. Next, we will discuss the application of different types of lithium ions in new energy vehicles.

　　First of all, lithium iron phosphate battery, as one of the high-voltage rechargeable batteries for BYD vehicles of domestic brands, is very suitable for battery driven and battery driven hybrid vehicles. The disadvantage is that the energy density is average. However, the "blade battery" developed by BYD has solved this problem a few days ago.

　　Second, lithium cobalate battery, as the originator of lithium battery, was originally built on Tesla Roadster, but because of its low cycle life and safety factor, it is actually not suitable for power lithium battery. To fill this gap, Tesla has applied the world's most powerful rechargeable battery intelligent management system to ensure the reliability of rechargeable batteries.

　　Third, ternary lithium battery is a ternary lithium battery that uses nickel cobalt manganic acid or lithium nickel cobalt aluminate as the cathode material of lithium battery. The cathode material of lithium battery is higher than the energy, but the safety factor is weak. For pure electric vehicles that require high endurance, the prospect is very broad. Typical model: The 21700 ternary lithium battery (diameter: 21mm, length: 70mm) used by Tesla Model 3 has improved in terms of energy density, cost and lightweight compared with the previous 18650 ternary lithium battery.

　　Fourth, lithium manganate batteries. Japanese and Korean battery enterprises such as AESC, Toshiba, LEJ, Hitachi and LG have widely used lithium manganate batteries in new energy vehicles of mainstream brands in Japan, South Korea, Europe and the United States. In particular, by the end of 2017, the total market sales volume of blade production was 350000 sets. However, the specific energy and general safety factor of lithium manganate battery are low.

　　Finally, lithium titanate battery, as a new type of cathode material for lithium battery, became important in the late 1990s due to its many excellent properties. Due to the low specific energy of rechargeable battery, it is more suitable for large city buses.

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