Analysis of the advantages and disadvantages of cylindrical lithium batteries

1) As mentioned above, the monomer has good consistency; 2) The monomer itself has good mechanical properties. Compared with square and soft-pack batteries, the closed cylinder can obtain the highest bending strength under the approximate size; 3) The technology is mature and the cost is low, 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 (the popular saying In other words, what you score will destroy you, and what can’t kill you will also make you stronger. The same thing is true) 5) Cylindrical lithium batteries PACK groups round batteries are relatively easier to use, so the PACK method is simple. The heat dissipation effect is good, and the heat dissipation problem must be handled when the square battery packs. Disadvantages: 1) In the context of electric vehicles, the number of cylindrical cells in the battery system is very large, which makes the battery system more complex, regardless of the organization or management system, related to the other two types of batteries, system-level costs Cylindrical batteries are on the high side; 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 is believed to be a helpless choice, because 10 years ago, The only qualified power lithium-ion batteries that can be processed in large quantities are 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 has 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 it.