How are 18650 lithium batteries different from other batteries?

Compared with other batteries, the laminated lithium battery is far from mature. The common ones are square batteries, soft pack batteries, and even the size, size, and position of the tabs are not uniform. The processing technology possessed by battery manufacturers The conditions cannot be met either. Most of them are controlled by humans, and the consistency of the battery cannot reach the level of 18650 batteries. If the consistency of the battery fails to meet the requirements, the management of the battery pack formed by a large number of battery strings and parallel will not allow the performance of each battery to be better played, and the 18650 battery cell can solve this problem. In summary, the cell capacity of the 18650 battery is small, and the number of cells required will be a lot (ModelS has 7104), but the consistency is very good; the capacity of the stacked battery can be made larger (20Ah to 60Ah), single The number of bodies can be reduced, but the consistency is poor. In contrast, at this stage, it is difficult to invest a lot of manpower and material resources to improve the processing technology of laminated batteries together with battery suppliers. Therefore, when developing Roadster and ModelS, Tesla's only option is to buy batteries from the market and develop its own battery system. In contrast, the technical difficulty of developing a battery system that manages more than 6000 cells with good consistency is less than that of developing a battery system with more than 200 cells with poor consistency. Even if the number of single batteries increases, if the performance of these batteries is reliable, it is still easier to manage. It can be said that the use of 18650 batteries as the source of power for new energy electric vehicles is the best choice at this stage. As the battery technology matures, more new types of batteries will be used in new energy electric vehicles. As a cylindrical battery, the 18650 has the same appearance as ordinary AA batteries. It is precisely this that makes it widely applicable to various electronic products. And compared with the traditional AA5 battery, its volume is larger, and its capacity is more guaranteed! 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 post: What are the reasons for the short circuit of the lithium iron phosphate battery?