Features of cylindrical lithium battery

　　The cylindrical lithium battery cell, especially 18650, due to its own structural characteristics and the standardization of its model, the level of automation of cylindrical cell production, the highest in the three main battles forms. This makes high consistency possible, and the rate of finished products has been improved accordingly.

　　Characteristics of cylindrical lithium battery

　　1) As mentioned earlier, the single consistency is better;

　　2) The monomer's own mechanical properties are good. Compared with square and soft -bag batteries, the closed cylindrical body can get the highest bending strength at the approximate size;

　　3) The technical maturity and low cost, but at the same time, the space optimization space has been consumed;

　　4) Single energy is small. When an accident occurs, the form is easy to control, but this is also becoming the reason for it to be replaced. You are strong, the same thing is the same)

　　5) Cylinage lithium battery PACK group

　　Round batteries are relatively easy to use, so the PACK scheme is simple, the heat dissipation effect is good, and the heat dissipation problem should be solved when the square battery is PACK.

　　Disadvantages of cylindrical lithium battery:

　　1) In the context of electric vehicles, the number of cylinders in the battery system is large, which makes the complexity of the battery system greatly increased. Regardless of the organization or management system, compared to the other two types of batteries, the system -level cost cylindrical battery High;

　　2) Under uneven temperature and environment, the probability of a large number of battery characteristics has increased. Of course, the reason why Tesla chose 18650 at the beginning of design is just a helple Qualified power batteries are only cylindrical batteries. The safety and thermal management needs of batteries are the development driving force of its powerful electrical control system.

　　3) The room for rising energy density is already very small. In the news of 2016, Chaowei achieved a single capacity of 4050mAh, and the battery cells were 306WH/KG than energy. Since then, no higher records have been seen. In the established space, there is only dead ingredients, which is recognized as a difficult road.

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