Explain the technical knowledge of lithium-ion battery

1. What is lithium ion battery? Lithium ion battery is the battery we use in mobile phones or electric cars.英文: Li's more professional explanation is a rechargeable battery that uses metal lithium or lithium alloy as the cathode material and uses a non-hydrolyzed solution. Lithium ion batteries can be roughly divided into two categories: lithium ion batteries and lithium metal batteries. We use a lot of lithium-ion batteries, and then we start to see lithium metal batteries are safer, more powerful, and more cost-effective. Lithium-ion batteries do not contain metallic lithium and can be recharged. The lithium ion battery mentioned in this article mainly refers to the lithium ion battery. Lithium-ion battery is mainly composed of two parts: battery and management system (a simple management system is also called protection board). The battery is the heart of the lithium-ion battery, and the battery management system is the brain of the lithium-ion battery. Battery, BMS (Battery Management System), PCM (Protection Circuit Module) lithium-ion batteries must use a proper battery management system, otherwise it is very dangerous. Lithium-ion batteries with a lithium-ion battery management system are usually called lithium packs. 2. What is the power of lithium-ion battery? Lithium-ion battery is a kind of power, which refers to the application on the power transmission system of the battery. Lithium-ion batteries for ion batteries, power tools, self-balancing vehicles, lithium-ion batteries, and more widely, sometimes store energy, lithium-ion batteries, and power lithium batteries. Compared with ordinary lithium-ion batteries, power lithium-ion batteries generally have more special requirements, such as high energy density, high volume-to-energy ratio, wide temperature range, high-power discharge support, longer cycle life and more safety. 3. The structure of lithium-ion batteries Lithium-ion batteries are mainly composed of four parts: positive electrode material, negative electrode material, electrolyte, and thin film. Lithium-ion battery packs are mainly composed of two parts: battery and battery management system. 4. The working principle of lithium ion battery Lithium ion battery is that lithium ions are repeatedly inserted between the positive electrode and the negative electrode to realize the charging and discharging of the battery. It is actually a redox reaction. The principle of the charging process is as follows (the opposite of the discharge process): Positive electrode: LiCoO2→Li(1-x)CoO2+(x)Li++(x)e- negative: C+(x)Li++(x)e-→CLi(x) battery Reaction: LiCoO2+C→Li(1-x)CoO2+CLi(x) 5. The advantages and disadvantages of lithium-ion batteries compared the advantages and disadvantages of lithium-ion batteries with lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries and other batteries . Lithium-ion batteries have the advantages of high voltage, high energy density (light weight, small size), long service life, and environmental protection. The disadvantages of lithium-ion batteries are relatively high price, relatively narrow temperature range, and certain safety risks (to add a new protection system). 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: Detailed analysis of the structure and working principle of lithium-ion batteries