Comparison of the advantages and disadvantages of ternary lithium ion batteries and lithium iron phosphate batteries

Speaking of the core of an electric car, it is the power lithium-ion battery. Ternary lithium and lithium iron phosphate are the two mainstream technologies. What are their advantages and disadvantages? 1. The heart of electric vehicles? According to public materials, lithium-ion batteries are divided into chemical, physical and biological batteries. The choice is chemical battery electric vehicles, which is the origin of car driving energy. A heart, the structure of electric vehicles can be divided into batteries and fuel power batteries, which refers to a rechargeable battery, nickel-hydrogen battery, lithium battery, polymer lithium battery and lead-acid battery. Long life and full charge, now ordinary battery electric vehicles and even most electronic products (this article is original, Sanmao start, reprint please specify); 2. How to evaluate the function of power lithium-ion battery? As we all know, lithium battery cathode material , The anode material, the gap and the electrolyte of the four parts, the capital of the anode material reaches 30%, and the battery function key, based on the timely progress, uses different materials to be divided into lithium titanate, lithium cobalt oxide, and lithium manganate. , Lithium iron phosphate, nickel, cobalt, manganese and cobalt nickel aluminum six, the latter two are famous ternary lithium batteries, also known as ternary polymer batteries; industry insiders point out that it is important to study the functional indicators of power lithium-ion batteries Including energy storage density, cycle life, five dimensions responsible for safety, speed, collision resistance, gentle energy storage density, and two basic profiles of safety. Lost lithium manganate battery and lithium battery due to low energy storage density, lithium cobalt oxide due to safety Poor performance, leaving only two major markets, batteries and lithium iron phosphate ternary lithium batteries, which are used in the passenger car market and the passenger car market; 3. Ternary lithium batteries and lithium iron phosphate batteries? In fact, there are two types of ternary lithium batteries. Lithium and lithium iron phosphate batteries are certainly not good or bad, but everyone has his strengths. During this period, the advantages of ternary lithium batteries are the energy storage density and low temperature resistance in two aspects, first in terms of energy storage density. , Ternary lithium battery, because of the high voltage, the energy density can reach 240wh/kg, the lithium iron phosphate battery is almost 1.7 times that of 140wh/kg (this article is original, Sanmao start, reprint, please specify); together, NCA ( Compared with the sliding two batteries (nickel-cobalt-manganese), the NCA function is more prominent, but due to low-temperature thermal runaway, processing requirements, higher capital, and skills are in the hands of Japan, Korean, and automobile companies. Compared with the important domestic sliding battery developed in China, it is divided into four years 111, 523, 622 and 811 in time according to the ratio of ternary materials. Among them, the 881 high nickel battery has become the direction of the breakthrough point because it is the energy density of the battery. Important progress; followed by low temperature resistance, ternary lithium batteries for low temperature -30 degrees lower limit, lithium iron phosphate batteries have more advantages compared to the low temperature limit of minus 20 degrees, under the same low temperature conditions , The winter attenuation of ternary lithium batteries is less than 15%, which is significantly higher than that of lithium iron phosphate batteries. The attenuation is as high as 30% or more. It is more suitable for northern shopping malls. This is why BYD sells to the south, and it is difficult to open a key location in the north ( This article is original, the third engine starts, please specify if reprinted); However, the three advantages of lithium iron phosphate, one is high safety, because the temperature of the thermal runaway of the lithium iron phosphate battery is higher than 500 degrees. Generally, the ternary lithium battery is less than 300 degrees, and some high temperature nickel batteries are thermally out of control or even less than 200 degrees. Compared with lithium iron phosphate batteries, the risk of spontaneous combustion during car overspeed and fast charging is low; second, the cycle life is long, because The lithium iron phosphate battery will start to rot. The number of charging and discharging cycles exceeds 3,500, that is to say, its service life can be as long as 10 years, but the ternary lithium battery has only 2,000 charging and discharging cycles, which means its The service life is only 6 years, and the distance between the two can be seen. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: How much do you know about the battery life of new energy vehicles?