Brief analysis of factors affecting the life of lithium-ion batteries

What are the factors that affect the life of lithium-ion batteries? 1. The molar volume of deep discharge lead sulfate is greater than that of lead oxide. One mole of lead oxide is converted into one mole of lead sulfate, which increases the volume by 95%. The bond between the lead dioxide molecules is not strong. During the discharge process, the active material expands on the positive electrode, and the lead dioxide particles will gradually relax. 2. To charge the battery too high will decompose water and water into oxygen and hydrogen. If the battery is overcharged, a large amount of oxygen will be released. Due to the strong oxidizing use of oxygen, oxygen will also corrode the electrode plate, make the active material detach from the electrode plate, and affect the battery life. 3. The temperature is too high. When the temperature of the battery rises to within 45°C, it is beneficial to the use of the battery and can extend the service life of the battery. However, during the charging process, if the battery temperature is higher than 50°C, the acid corrosion of the battery board will be accelerated, and the battery casing will also accelerate the aging due to the increase in temperature. 4. The increase in the concentration of sulfuric acid in the electrolyte of the sulfuric acid corrosion battery will increase the capacity of the positive plate, thereby increasing the capacity of the battery. But it will increase the self-discharge of the battery, accelerate the corrosion of the electrode plate, make the lead dioxide loose and fall off, and increase the corrosion of the battery, which will reduce the battery life. What is the future of lithium-ion battery recycling According to statistics, in the first nine months of this year, new energy vehicles produced 302,000 vehicles and sold 289,000 vehicles, up 93.0% and 100.6% year-on-year respectively. The production and sales volume of pure electric vehicles was 229,000 and 216,000, up 118.1% and 128.4% year-on-year respectively. The production and sales of plug-in hybrid vehicles reached 73,000 units, an increase of 41.7% and 47.2% year-on-year respectively. Lithium-ion battery policy transformation and industrial structure adjustment are the only way to make the industrial development more healthy and perfect. With the continuous upgrading of electric vehicle technology and the continuous improvement of industrial concentration, the industry will continue to develop rapidly in the future. According to statistics from the highway department, the average annual mileage of cars and light vehicles is 50,000 kilometers, medium-sized parking spaces are 40,000 kilometers, and heavy-duty vehicles are 30,000 kilometers. Under the same driving conditions, the battery life of a pure electric bus is about 4-6 years. However, pure electric commercial vehicles drive many times a day, have long driving mileage, frequent charging, and the power lithium battery has a lifespan of about 2-3 years. At present, the average retirement life of passenger cars in my country is 12-15 years, and the mandatory retirement life of commercial vehicles is 10 years. Electric vehicles should replace their power lithium batteries at least twice during their life cycle. In addition, due to uncertainty (accidents, man-made causes, etc.), the life cycle of power lithium batteries will continue to change. The cathode materials of different power lithium-ion batteries contain different precious metals, among which the most potential metals are cobalt, lithium and nickel. For example, the average content of lithium in a ternary battery is 1.9%, nickel is 12.1%, and cobalt is 2.3%. In addition, the ratio of copper and aluminum has reached 13.3% and 12.7%. If it can be recycled reasonably, this will become an important source of income and cost reduction. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.