18650 lithium ion battery is better than polymer lithium ion battery?

We know that under extreme conditions (such as overcharge, high temperature, etc.) lithium-ion batteries will have violent chemical reactions 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. 2. The international price of the lower 18650 is about 1USD/pcs, which is about 3RMB/Ah if calculated according to 2Ah. The price of polymer lithium-ion battery is 4RMB/Ah for low-end cottage factories, 5~7RMB/Ah for mid-end, and 7RMB/Ah for mid-to-high end. Like ATL and Lishen, they can generally sell for around 10RMB/Ah, and you are not willing to pick them up when your order is small. 3. Can not be customized SONY has always wanted to make lithium-ion batteries the same as alkaline batteries. There are certain industrial standards, such as AA batteries and AA batteries, which are basically the same all over the world. However, because a major advantage of lithium-ion batteries is that they can be designed according to customer needs, there is no uniform standard. So far, the lithium-ion battery industry basically only has a standard model of 18650, and the others are based on customers. Need to be designed. This is why the room where the 18650 battery is tested generally must be protected by layers, and people must not be allowed in 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. 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: How to detect the quality of lithium-ion batteries in electric vehicles