Today, pure electric vehicles are more popular than ever, with Tesla Model 3 sales adding 11,095 units in May. Nowadays, pure electric vehicles have the option of lithium iron phosphate batteries and ternary lithium batteries. As a private car user, which battery type is better for electric vehicles?

　　Behind the long battery life is the high probability of spontaneous combustion

　　Ternary lithium-ion batteries have high energy density and long battery life, but are prone to spontaneous combustion caused by high temperatures.

　　Customers who buy pure electric vehicles are most concerned about the service life and long mileage. They must increase the battery capacity, and lithium-ion batteries have more energy than them. Now all models including tesla Motors3 are powered by triple lithium batteries. Compared with ordinary lithium cobalt, lithium-ion batteries have the advantages of high energy ratio and good cycle performance.

　　Ternary lithium batteries are not all defective. Both nickel-cobalt-aluminate lithium batteries and nickel-cobalt-manganese lithium batteries are very unstable. The high-temperature structure of nickel-cobalt-aluminum batteries is unstable, resulting in a low thermal safety factor and a high ph value of lithium-ion batteries. It is easy to cause a single abdominal distension, and the engineering cost of ternary lithium batteries is higher than that of lithium iron phosphate batteries.

　　Nowadays, many pure electric vehicles catch fire when they start up. It is not the ternary lithium battery that should be blamed, but the design of the ternary lithium battery. How to reduce the high temperature caused by the design and reduce the heat will become the future of the ternary lithium battery. The development trend of lithium batteries.

　　Statistical analysis of pure electric vehicle starts in 2018

　　In 2018 and this year, several pure electric vehicle fire incidents occurred. People also suspect that power lithium-ion battery companies and battery car companies do not pay attention to safety issues. In order to control costs, lithium-ion products are not strictly managed, and the bms design plan has passed Low, there is not enough safety design to maintain the power lithium-ion battery.

　　Statistical analysis of the starting status of pure electric vehicles this year

　　Rechargeable lithium phosphate battery safety and long life low durability

　　Lithium phosphate battery rechargeable battery is a lithium-ion battery using lithium phosphate battery as the cathode material. It is not a precious raw material such as cobalt, the raw material is cheap, phosphorus and iron are abundant in the earth's resources and are not easy to feed. Its working conditions are moderate (), large net weight capacity (170mah/g), high discharge power, fast charging, long life, and high reliability in high temperature and high fever environments.

　　Generally speaking, lithium iron phosphate batteries have the advantages of high safety factor, long service life, no excessive heavy metals and non-ferrous metals (low raw material cost), fast charging, and wide operating temperature coverage. However, the vibration density and compaction relative density of lithium-ion batteries are very low, resulting in low specific energy of lithium batteries, low output rate of rechargeable batteries, and poor consistency of rechargeable batteries.

　　Keep paying for your car, be safe and pay for lithium-ion battery cars

　　For many BEV buyers, the above comparison of lithium-iron-phosphate batteries and lithium-ion batteries is too technical. There's no question that buyers of pure electric vehicles care about endurance, safety and reliability. For ordinary people's automobile systems, operating vehicle systems and commercial models, automobile companies must choose lithium iron phosphate batteries with service life, cost and safety factors.

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　　For mid-to-high-end car systems and major diversified and featured car systems, automobile companies and customers have also chosen large space, high energy density, fast charging and high-efficiency ternary lithium batteries. In other words, the range of these ternary lithium-ion batteries will be less than the p7, which will produce a lot of mileage, but the cost of recharging the batteries will be higher, so the car will be more expensive.

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