Compared with 18650 batteries, what are the advantages of lithium polymer batteries?

1. High energy density. The capacity of a general 18650 battery can reach about 2200mAh, so that the energy density is about 500Wh/L, while the energy density of polymer batteries is currently close to 600Wh/L. 2. Good safety. We understand that under extreme conditions (such as overcharge, high temperature, etc.) lithium-ion batteries will have a violent chemical reaction inside and a large amount of gas will appear. The 18650 battery uses a metal shell with a certain strength. When the internal pressure reaches a certain level, the steel shell will burst and explode, causing a terrible safety accident. This is why the room where the 18650 battery is tested generally must be protected by layers, and no one can enter during the test. Polymer batteries do not have this problem, even in extreme cases, due to the low strength of the packaging film, as long as the air pressure is slightly higher, it will rupture and will not explode. The worst case is combustion. So in terms of safety, polymer batteries are better than 18650 batteries. This is a 18650 lithium-ion battery cell, which is completely different from polymer batteries. 3. It can be designed according to customer needs. This has already been said above, so I won’t repeat it. 4. The price is relatively high. The international price of 18650 is about 1.2USD/pcs. If calculated according to 2Ah, it is about 4RMB/Ah. The price of polymer lithium batteries is 4RMB/Ah for low-end copycat factories, 5~7RMB/Ah for mid-range, and more than 7RMB/Ah for mid-to-high end. Products like ATL, Ubet, Lishen, etc., can generally sell for around 10RMB/Ah, and you are not willing to pick them up when your order is small. But polymer batteries also have their own shortcomings. The important thing is that the cost is high. Since it can be designed according to customer needs, the Ru0026D cost must be included. In addition, the variety of shapes and types have resulted in non-standard parts of various tooling and fixtures in the manufacturing process, and correspondingly increased costs. The polymer battery itself has poor versatility, which is also brought about by flexible design. It is often necessary to design a new one for the customer for the difference of 1mm. The cost is still the cost. . . Of course, what I said above is not absolute. The 18650 also has high-end applications. For example, the Tesla Model S, which is very popular recently, uses the 18650 battery pack supplied by Panasonic. Therefore, 18650 does not mean low-end, but some domestic cottage factories make this variety low-end. 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: Do you know what a high-voltage battery is?