Divide lithium battery types by packaging materials

Lithium batteries are classified as packaging materials. ✔ Square shell (aluminum/steel shell) batteries. The square hard shell battery shell is made of aluminum alloy, stainless steel and other materials. Membrane battery) is good, the safety of the core has been greatly improved compared with cylindrical batteries. The square aluminum shell power lithium battery is developed on the basis of the steel shell. Compared with steel shells, aluminum shells have become the mainstream of square hard shell power lithium batteries. Because the square hard-shell power lithium battery can be customized according to the size of the product, there are thousands of models on the market, and because there are too many models, the process is difficult to unify. ✔ The key materials used in soft-pack batteries (battery aluminum-plastic film) soft-pack lithium batteries, such as cathode materials, anode materials, membranes, electrolytes, etc., are not significantly different from traditional steel shell and aluminum shell lithium batteries. The biggest difference lies in the soft pack material (aluminum-plastic composite film), which is the most critical and technically difficult material in the soft pack lithium battery. The soft-package lithium battery is the abbreviation of using aluminum-plastic film and other soft-package lithium batteries, which is important for different from the traditional use of metal aluminum and other hard-shell lithium batteries. Soft pack batteries are safer, lighter, and larger in capacity. The disadvantages of soft pack batteries are poor consistency, high cost, and easy leakage. ✔Cylindrical battery There are many types of cylindrical lithium batteries, such as 18650 and 21700. The processing technology of cylindrical lithium battery is mature, the packaging cost is low, the battery product yield is high, and the battery pack consistency is good. Due to the large heat dissipation area of u200bu200bthe battery pack, its heat dissipation performance is better than that of a square battery. Cylindrical batteries are easy to combine into multiple forms and are suitable for the full layout design of electric vehicle spaces. However, cylindrical batteries are usually encapsulated in steel or aluminum shells, which are heavier and have lower energy. With the further expansion of the electric vehicle market and the continuous improvement of mileage requirements, automobile manufacturers have put forward higher requirements for power lithium-ion batteries in terms of energy density, manufacturing costs, cycle life, and product additional attributes. Under the premise that no major breakthrough has been made in the field of raw materials, adding the volume of cylindrical batteries to obtain greater battery capacity has become an exploration direction. 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: What is the application prospect of lithium batteries in electric vehicles?