Cylindrical, square, soft pack power lithium-ion battery, which is better?

Cylindrical, square, and soft-pack-powered lithium-ion batteries, which is better? Now the automotive power lithium-ion battery market is mainly composed of cylindrical and square, soft-pack The current automotive power lithium battery market is mainly composed of cylindrical, square, and soft-pack lithium-ion Batteries, under the guidance of current national policies, have become an important overall energy density index for power lithium batteries. Below, we will look at the product characteristics and current market representative manufacturers. composition. Under the guidance of current national policies, the total energy density of power lithium batteries has become an important indicator. Below, we will introduce the characteristics of the product and the representative manufacturers on the market. 1. Cylindrical lithium-ion battery: skilled in technology, rich in relevant experience, and stable rising test rate. Cylindrical lithium-ion battery is the earliest mature industrial lithium-ion battery product. The 18650 lithium-ion battery was first introduced by Sony Corporation of Japan in 1992. The important application direction at that time was 3C digital products. After more than 20 years of development, cylindrical lithium-ion batteries have already had a mature production process, with high production efficiency and relatively low cost, so the packaging cost is relatively low. The yield of lithium ion batteries is higher than that of square lithium ion batteries and soft lithium ion batteries, and the product consistency and safety are better. At the same time, cylindrical lithium-ion batteries have better heat dissipation performance than square batteries due to their large heat dissipation area. At the same time, because the cylindrical battery is easy to combine various forms, it is suitable for the full layout of the electric vehicle space design. Based on these advantages, most domestic companies choose cylindrical batteries in the power supply field. However, cylindrical batteries are usually enclosed in a steel case, which is safer, heavier, and has lower energy. This has also become a disadvantage of cylindrical lithium-ion batteries in power lithium battery applications. 2. Square battery: There are many types of technologies, and the models are mostly one-piece square battery shells are mostly aluminum alloy, stainless steel and other materials. The internal winding or lamination technology is used to protect the battery better than soft batteries, and the safety of the battery is better than that of cylindrical batteries. The battery has been greatly improved. At present, the square battery is still developing in the direction of high-hardness shell and lightweight technology, which will also provide the market with better performance lithium-ion battery products. 3. Soft-pack battery: The thickness is good. I only sigh the cost of Tianjiao. The positive electrode material, negative electrode material and membrane used in soft-pack battery are not much different from traditional steel shell and aluminum shell lithium-ion batteries. The biggest difference lies in the use of polymer electrolytes and soft packaging materials, which are the most critical and technically difficult materials in soft-pack batteries. As a new battery specification, emerging in the passenger car field in recent years, the proportion of soft-clad batteries is gradually increasing in the field of passenger car power lithium batteries, because the material cost of soft-clad batteries is higher than that of cylinders and squares, so cost issues Will be the key to soft-clad battery company's breakthrough. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.