What are the advantages and disadvantages of cylindrical lithium batteries?

Advantages of cylindrical lithium battery 1) Better monomer consistency; 2) Good mechanical properties of the monomer itself. Compared with square and soft-pack batteries, the closed cylinder can obtain the highest bending strength under the approximate size; 3) Technology Mature, low cost, but at the same time, the space for cost optimization has been consumed almost; 4) The single energy is small, and the form is easy to control in the event of an accident, but this is also becoming the reason for its replacement (what is the popular saying? Speaking, what you score will also destroy you, and what can’t kill you will also make you stronger. The same is true.) 5) Cylindrical lithium batteries PACK groups round batteries are relatively easier to use, so the PACK method is simple and heat dissipation The effect is good, and the heat dissipation problem should be handled when the square battery packs. Disadvantages of cylindrical lithium batteries: 1) In the context of electric vehicles, the number of cylindrical monomers in the battery system is very large, which makes the complexity of the battery system greatly increased, regardless of the organization or management system, related to the other two types of batteries, systems The cost of the cylindrical battery is relatively high; 2) Under the uneven temperature environment, the probability of a large number of battery cell characteristics is increased. Of course, the reason why Tesla chose 18650 at the beginning of the design, I believe it is just a helpless choice, because 10 Years ago, the only qualified power lithium-ion batteries that could be processed in large quantities were cylindrical batteries. The safety and thermal management requirements of the battery are instead the driving force for the research and development of its powerful electronic control system. 3) There is little room for the increase in energy density. In the 2016 news, Chaowei achieved a single capacity of 4050mAh and a cell specific energy of 306Wh/kg. Since then, no higher records have been seen. In a given space, there is only dead material, which is recognized as a difficult road. 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.