How long is the life of ternary lithium and lithium iron phosphate batteries

New energy vehicles are basically lithium-ion batteries. The mainstream lithium-ion batteries are divided into two types: lithium iron phosphate batteries and ternary lithium batteries. Among the overall cost of new energy vehicles, the cost of the battery is the largest, and the life of the battery The question is the focus of all new energy vehicle owners, how long is the life of ternary lithium and lithium iron phosphate batteries? What is the difference between lithium iron phosphate battery and ternary lithium battery? Lithium iron phosphate battery is a type of lithium ion battery, which refers to a lithium ion battery that uses lithium iron phosphate as a positive electrode material. It is characterized by strong safety and stability, high temperature resistance, and good cycle performance. The ternary lithium battery is also referred to as the 'ternary polymer lithium batteryDue to the smaller size and higher capacity density of ternary lithium batteries, they are currently being widely used in new energy vehicles. For example, we are familiar with Tesla, which uses ternary lithium batteries in all its models. The difference between lithium iron phosphate battery and ternary lithium battery lies in the difference in the positive electrode material. The voltage standard of lithium iron phosphate battery is 3.2V, and the voltage standard of ternary lithium battery is 3.7V. The ternary lithium battery has an advantage in voltage. However, compared with the ternary lithium battery, the lithium iron phosphate battery has a safer performance. Which is better, lithium iron phosphate battery or ternary lithium battery? 1. Battery energy density ◇Ternary lithium is better than lithium iron phosphate. Generally speaking, in the case of unit volume or weight, the ternary lithium battery can store more power and the vehicle has a greater range. This is due to the difference in electrode materials between the two. The anode material of the lithium iron phosphate battery is lithium iron phosphate, while the ternary lithium battery is nickel cobalt manganese or nickel cobalt aluminum. The difference in chemical characteristics makes the energy density of a ternary lithium battery of the same mass 1.7 times that of lithium iron phosphate. 2. Safety performance ◇Lithium iron phosphate is better than ternary lithium. Among the current mainstream car batteries, lithium iron phosphate has the best thermal stability. It starts to dissolve when the ambient temperature reaches 600°C. In contrast, ternary lithium batteries begin to dissolve at around 300°C. In spontaneous combustion incidents, it is true that ternary lithium battery models occupy a larger proportion. 3. Low temperature performance ◇ Ternary lithium is better than lithium iron phosphate. The attenuation of the cruising range of pure electric vehicles has become the default phenomenon in the industry. The performance of lithium iron phosphate battery is worse than that of ternary lithium at low temperature. The battery capacity of lithium iron phosphate decays to about 50% at -10°C, and the battery should not exceed -20°C. The lower limit of ternary lithium is -30℃, and the attenuation degree is smaller than that of lithium iron phosphate at the same temperature. 4. Service life ◇Lithium iron phosphate is better than ternary lithium. The car battery pack is the same as the cell phone battery. When the chemical substances in it have undergone multiple reactions, the total power consumption will decrease with the loss of activity. Lithium iron phosphate can be charged 3500 times before it decays to 80% of the mandatory replacement limit. It is estimated that it can be used for more than 10 years. The ternary lithium battery has decayed to the limit after about 2000 times, and it can only be used for about 6 years. Comprehensive evaluation: ternary lithium batteries are suitable for passenger cars, lithium iron phosphate batteries are suitable for buses, and solid-state batteries will be the world in the future. Comparisons are made from various aspects such as battery safety performance, density capacity, service life, and low temperature performance. Both have their own advantages. BYD, represented by lithium iron phosphate, feels that the safety performance is better. Tesla uses a ternary lithium battery, which has significant battery life advantages. The shortcomings of battery life will make consumers subconsciously ignore the remaining advantages. Since BYD began to adopt ternary lithium batteries, the battle of the century between the two batteries has also come to an end. It can only explain that in the field of family cars, the overall performance of ternary lithium batteries is obviously more in line with market demand. Unreasonable use will lose life. Regardless of whether it is a lithium iron phosphate battery or a ternary lithium battery, no matter what kind of battery technology, unreasonable use will cause the battery to attenuate, which will affect the battery life. Please pay attention to the following points: 1 , Fast charge often. Many new energy vehicles support fast charging mode, so many car owners will choose fast charging to charge the car with a certain amount of electricity in a short period of time to ensure the normal driving of the vehicle. Fast charging is a good feature, but frequent use of fast charging will reduce the battery's recovery ability, thereby reducing the number of cycles of charging and discharging, and causing certain damage to the battery. 2. Long-term storage at low temperature. The new energy vehicle batteries currently on the market are mainly divided into ternary lithium batteries and lithium iron phosphate batteries. Although they have different performances in the face of low temperatures, no matter which battery technology, there are batteries in the face of low temperature environments. The phenomenon of attenuation. 3. Frequently charge with low battery. Since lithium-ion batteries do not have a battery memory effect, electric cars are like our smart phones, which can be charged as they are used, and try not to run out of power while charging. 4. Bigfoot throttle. Because electric vehicles have a characteristic, that is, excellent acceleration performance, so some car owners like the big foot throttle, and the feeling of pushing the back comes immediately. However, it must be clear that the high current tipping will cause the internal resistance of the battery to increase sharply, and frequent driving in this way may even damage the battery. 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