Polymer lithium battery is a kind of lithium battery family. It also has other nicknames such as soft-pack lithium battery, soft-pack high-rate battery, polymer lithium-ion battery, soft-pack ternary lithium battery, etc., which makes many friends feel a little confused. The following editor will introduce in detail what polymer lithium batteries are from the aspects of manufacturing raw materials, charge and discharge performance, main application fields, etc., so that everyone can have a more comprehensive understanding of polymer lithium batteries.

 

1. Main raw materials

 

The main materials of polymer lithium batteries include positive electrode materials, separators, negative electrode materials, electrolytes, tabs and soft-wrapped aluminum-plastic film cases. Their quality and manufacturing equipment technology largely determine the charge and discharge performance and service life of the manufactured batteries.

 

Usually, lithium compounds LicoO2, LiNiO2 or LiMn204 are used as the positive electrode of polymer lithium batteries, and the lithium-carbon interlayer compound LixC6 is used as the negative electrode.

 

 

2. Polymer lithium battery manufacturing process

 

There are two main manufacturing processes for polymer lithium batteries, one is the winding process and the other is the lamination process.

 

The winding process is suitable for manufacturing cylindrical and small prismatic batteries. Due to the small discharge current, batteries manufactured by the winding process are suitable for some electronic devices that do not have high current requirements, and the shape of the battery is also relatively simple.

 

 

The lamination process can not only customize the shape of the battery as needed, but also has better charge and discharge performance than the winding process. Therefore, it can be used in the field of electronic equipment that requires large current discharge. Of course, it can also be used in electronic equipment that requires small current discharge. .

 

3. Charge and discharge performance of polymer lithium battery

 

 

The charge and discharge performance of polymer lithium batteries is better than other types of batteries, especially the fast charge and discharge performance and high current discharge performance. For example, in terms of fast charging, its fast charging performance can reach a charging speed of 10C rate, which is relatively fast. In terms of discharge performance, its maximum short-term discharge rate can reach 75C rate, and its stable discharge rate is below 45C rate, which can meet many short-term needs. Application equipment for large current discharge.

 

4. Main application areas of polymer lithium batteries

 

 

The main application of polymer lithium batteries depends on its actual power demand. For example, it can be applied to 3C electronic products with low current discharge, such as mobile phones, headphones and smart watches. If large current discharge is required, it can be applied to drones, manned drones, electric skateboards and other fields.

 

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