Comparison of various power lithium-ion batteries

Comparison of various types of power lithium-ion batteries Power lithium batteries are mainly considered according to their use, and are mainly used in electric vehicles, electric bicycles, and power tools. Power lithium batteries are different from ordinary batteries and have their particularities: A. Battery series and parallel B. Large battery capacity C. High battery discharge rate (hybrid power and electric tools) D. Higher battery safety requirements e. Battery operation Wide temperature range F. Long battery life, generally 5 to 10 years. Due to the particularity of power lithium batteries, there are certain differences in technology and materials. According to the situation of the positive electrode material, it is mainly divided into lithium manganate (LiMn2O4), ternary lithium (LiNixCoyMnzO2), lithium iron phosphate (LiFePO4), etc. There are certain differences in voltage platform, energy density, price, safety, etc., as follows As shown in the table: (Lithium cobalt oxide has poor stability, is expensive, and is rarely used as a power lithium battery. The comparison is shown in the table below) There are three important types of lithium-ion batteries in electric vehicles (BYD VS Tesla). : Lithium iron phosphate battery, lithium manganate lithium ion battery, ternary lithium ion battery and lithium ion battery for electric vehicles. Lithium iron phosphate batteries have been in my country before 2014. Domestic leading companies such as BYD BYD Electric Vehicles have adopted lithium iron phosphate as an important direction. However, defending Tesla, Tesla is buying Panasonic ternary lithium-ion batteries NCA Everyone has begun to re-examine this issue, and ternary lithium-ion batteries have also begun to appear. The basic process of lithium-ion batteries Different battery types and different manufacturers, the production process of lithium-ion batteries will also be very different. Here is a list of the most basic lithium-ion battery manufacturing processes. The production process of lithium-ion batteries is as follows: film making, filming, liquid injection, packaging, storage, chemical composition capacity, electrical measurement, packaging, etc. Battery pack process flow: spot welding batteries, welding protective plates, electrical testing, aging, packaging, etc. Lithium-ion batteries are connected in series and parallel. In different application fields, the requirements of the battery are different, and the system has some special requirements for voltage, capacity, and internal resistance. Generally, a single battery cannot meet the requirements, and the battery must be connected in series and parallel with lithium-ion battery packs to be connected to an external power source. The performance of the battery in series and parallel is determined by the performance of the worst battery, which is usually called the barrel principle. Therefore, the most important point of battery grouping is the consistency of battery performance parameters. Notebook computers, electric bicycles, electric vehicles, energy storage systems, etc. must consider series and parallel battery packs. Notebook computer battery voltage is generally 11.1v or 14.8v, and 18650 batteries are mainly used, so generally 2 series 3 or 2 series 4 are used. Apple iPAD has three polymer batteries connected in parallel with a capacity of approximately 25 watt-hours. Electric bicycles and electric motorcycle systems generally have 24V, 36V, 48V, 60V, 72V systems. The specific grouping of lithium-ion batteries is shown in the table below (S stands for series). The voltage of pure electric vehicles and hybrid electric vehicles (EV/PHEV) is relatively high, about 250~550V. For example, Tesla’s ModelS has more than 7,000 series-parallel 18650 lithium-ion batteries, while BYD’s qin has more than 140 series-connected lithium-ion batteries. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete it.