What is the difference between liquid 3.7v 18650 lithium battery and polymer 3.7v 18650 lithium battery?

　　Polymer 3.7v 18650 lithium battery liquid 3.7v 18650 lithium battery energy density (Wh/L)>300200~280 can be customized (shape) ductility (no metal protective cover required) is more difficult to use, lighter weight (no metal protective cover required) safer (no metal protective cover required) Metal protective cover) for greater safety.

　　What is the difference between liquid 3.7v 18650 lithium battery and polymer 3.7v 18650 lithium battery?

　　1. Energy density: The greater the energy density, the greater the kinetic energy, the kinetic energy of the enterprise volume. By improving the materials/thickness of the negative stage (anodization) and diaphragm, the specific energy of the polymer 3.7v 18650 lithium battery has reached 600Wh/L+.

　　2. Customizability: Polymer lithium batteries are easier and lighter in appearance, and they can be easily customized into various shapes without the need for a metal protective shell.

　　3. Net weight: It is indicated in the table.

　　4. Safety factor: Under extreme conditions (if charged/high temperature), strong chemical changes will occur inside the 3.7v 18650 lithium battery, resulting in a large amount of gas. At this time, the liquid 3.7v 18650 lithium battery is wrapped in a plastic shell. When the internal gas pressure increases When it is very large, the casing will crack and explode. Since the polymer 3.7v 18650 lithium battery is only wrapped with aluminum film (or plastic casing), as long as the internal gas pressure is slightly higher, it will expand or crack, which is not easy. causing an explosion. However, it should be noted that both liquid lithium batteries and polymer lithium batteries can ignite under extreme conditions.

　　5. Cost: In addition to the fact that the raw material cost of polymer lithium batteries is higher than that of liquid lithium batteries, polymer lithium batteries are highly customizable, which will cause huge costs in the design and manufacturing process. , such as various customized fixtures, tooling, experimental equipment, etc., cause the cost of polymer lithium batteries to be higher than standard shape/standard liquid lithium batteries.

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