What is the difference between polymer lithium batteries and 18650 lithium batteries?

At present, the commercially available batteries in the market are polymer lithium batteries and 18650 lithium batteries. If you don't manufacture batteries, many people won't know the difference between these two types of batteries.

The intuitive difference between polymer lithium batteries and 18650 lithium batteries in terms of battery cells is their appearance. Polymer lithium batteries are square in shape, with an aluminum-plastic film outer shell. They are a type of soft pack battery. The 18650 lithium battery is cylindrical in shape, with a steel shell and hard packaging. Meanwhile, the 18650 lithium battery has only one size, with a fixed diameter and height, and can be made with a large capacity of 3200mAh or smaller. However, lithium polymer batteries are different as they can be made into batteries of various sizes and shapes, such as triangles, trapezoids, arcs, etc. Of course, in addition to being spherical, it can also better control battery capacity.

The two types of batteries also differ in terms of electrolyte. Of course, even if the same battery is usually used, the electrolyte used may be different. The main difference here is in form. There are three types of electrolytes used in polymer lithium batteries, namely liquid, colloid, and solid. Different electrolytes have different advantages and disadvantages. The electrolyte used in 18650 lithium batteries is essentially liquid.

The manufacturing process of polymer lithium batteries is laminated. This process can change the size and shape of battery manufacturing at low cost and high efficiency. It can produce batteries with suitable shapes according to the actual application needs of the product, fully utilizing the product space, and making the product more in line with consumer application needs. The manufacturing process of 18650 lithium batteries is winding, with fixed dimensions and shapes.

The application field of polymer lithium batteries in commercial products is much larger in depth and breadth than 18650 lithium batteries. Basically, 18650 batteries can be used instead of polymer lithium batteries. It is specially produced in 3C. In the product field, under the requirements of miniaturization and high endurance of smart devices, 18650 batteries cannot be achieved, while lithium polymer batteries can.、

Guangzhou Battsys Co., Ltd (NEEQ:837375), was founded in 2006, which is a join-stock high-tech enterprise engaging in ODM and OEM , specially for customized and diverse research&production of lithium-ion battery，BATTSYS annual production capacity is tens of millions battery cells. The products are exported to dozens of countries & regions such as Europe, America & Asia etc.