Are the mainstream power batteries currently used in new energy vehicles the iron phosphate lithium ion battery and the ternary lithium ion battery?

Data show that in the first three quarters of this year, the total installed capacity of electric passenger vehicles in my country was 16.06GWh, of which ternary lithium-ion batteries accounted for 87%, which was 13.98GWh; lithium iron phosphate batteries accounted for 12%, which was 1.92GWh. Four months ago, ternary lithium still occupies an absolute advantage in the power lithium battery market. Data show that the installed capacity of lithium batteries in my country's new energy vehicle market in July was 3.34 Gwh, a year-on-year increase of 29.01%. Among them, the installed capacity of ternary lithium-ion batteries is 2.35Gwh, accounting for 70.26%; the installed capacity of lithium iron phosphate batteries is 0.93Gwh, accounting for 27.81%. This data shows the gap between them and their advantages and disadvantages. , Today’s Xiangxiang will analyze one or two. 1. The cycle charging life is different. Lithium iron phosphate batteries and ternary lithium-ion batteries have different material systems. The lithium iron phosphate battery uses a 3.2v voltage platform. The cycle life is more than 2000 times. The ternary lithium-ion battery uses a 3.6v voltage platform. Some companies can do 500 cycles of recharging, and some companies can do more than 1,000 cycles. 2. What are the advantages of lithium iron phosphate batteries? Long life, safe to use, can be charged and discharged quickly with high current, high temperature resistance, no memory effect. In fact, it also has a very obvious advantage, that is, the price is low. Third, the shortcomings of lithium iron phosphate batteries. The energy density is small, the conductivity is poor, the lithium ion diffusion speed is slow, and the tap density is low. Many domestic car companies use two mainstream materials, lithium iron phosphate batteries and ternary lithium ion batteries. Like BYD cars, it uses more lithium iron phosphate batteries. For example, the very famous Tesla uses a ternary lithium-ion battery. At present, it can also be seen from the above data that most car companies are more inclined to use ternary lithium-ion batteries. Because of the ternary lithium-ion battery, its size is small, the energy is larger, and the low temperature performance is good. Back to the original question: Can the lithium iron phosphate battery complete the counterattack and achieve a gorgeous turn? According to this trend, it is impossible to surpass the ternary lithium-ion battery. But it does not mean that its market share will decline. With the increase in the total amount of new energy vehicles, ternary lithium-ion batteries and lithium iron phosphate batteries will be doubled. The market still has demand for lithium iron phosphate batteries. 1. The energy is relatively high. With high storage energy density, it has reached 460-600Wh/kg, which is about 6-7 times that of lead-acid batteries; 2. Long service life, service life can reach more than 6 years, 1C charge and discharge of batteries with lithium iron phosphate as the positive electrode , There are records that can be used 10,000 times; 3. The rated voltage is high, and the single working voltage is 3.7V or 3.2V, which is approximately equal to the series voltage of 3 nickel-cadmium or nickel-metal hydride rechargeable batteries, which is convenient to form a UPS power battery pack; The battery can be adjusted to 3.0V through a new type of lithium-ion battery voltage regulator technology to suit the use of small electrical appliances; 4. With high power tolerance, the lithium iron phosphate battery used in electric vehicles can Reach 15-30C charge and discharge capacity, which is convenient for high-intensity start-up acceleration; 5. The self-discharge rate is very low, which is one of the most prominent advantages of lithium-ion batteries. Generally, it can be less than 1%/month, less than nickel 1/20 of hydrogen battery; 6. Light weight, the weight is about 1/6-1/5 of lead-acid product under the same volume; 7. High and low temperature adaptability is strong, and it can be in the environment of -20℃--60℃ It can be used in an environment of -45℃ after processing. 8. Lithium-ion battery is green and environmentally friendly. Regardless of production, use or scrap, it does not contain or present any toxic and harmful heavy metal elements such as lead, mercury, cadmium, etc. And matter. 9. Production basically does not consume water, which is very beneficial to my country, which is short of water. The difference between lithium iron phosphate batteries and lithium ion batteries: 1. Lithium iron phosphate battery packs are used to make lithium ion secondary batteries. Now the important direction is power lithium batteries. Compared with NI-H and Ni-Cd batteries, it is very different. Big advantage. 2. Lithium-ion battery is a type of battery that uses lithium metal or lithium alloy as the cathode material and uses a non-aqueous electrolyte solution. The chemical properties of lithium metal are very active, which makes the processing, storage and use of lithium metal very demanding on the environment. 3. Lithium iron phosphate puncture will not cause fire or explosion. Lithium ion batteries will. 4. The lithium iron phosphate battery will not catch fire and explode if it is overcharged to 100%; the lithium ion battery will gas out and swell when it reaches the specified value.