18650 lithium ion battery.What are the differences between polymer lithium batteries and 18650 lithium batteries?

1. Different battery types

18650 lithium batteries can be divided into 18650 lithium ion batteries, 18650 lithium iron phosphate batteries, and 18650 nickel-metal hydride rechargeable batteries; while AA batteries include nickel-metal hydride rechargeable batteries, nickel-cadmium rechargeable batteries, alkaline zinc-manganese batteries, and ordinary acidic zinc-manganese batteries. (Called regular-grade batteries). In addition, polymer lithium batteries are known to use aluminum-plastic packaging film as the outer packaging of lithium batteries, that is, soft-pack batteries. This packaging film is composed of three layers: pp layer, al layer and polyester layer. Because pp and polyester are polymers, this lithium ion core is called a polymer lithium battery.

2. Different manufacturing processes

This article introduces the production and processing technology of lithium batteries. This technology can change the specifications and appearance design of battery production. It has the characteristics of low cost and good effect. It can make the rechargeable battery suitable for the appearance design according to the specific application regulations of the product and more suitable for user use. The production and processing technology of 18650 lithium-ion battery is a backline machine, which has fixed specifications and appearance design.


3. The size designs of lithium batteries and 18650 are different

The most obvious difference in cell design between lithium-ion batteries and 18650 lithium batteries is the appearance design. The polymer lithium battery is square and has a soft-packed battery shell; the 18650 lithium battery is cylindrical, the shell is steel shell, and is hard-packed; in addition , 18650 lithium ion has specifications, fixed height, and can be made into large capacity at 3200ma or below; polymer lithium ion batteries can be made into rechargeable batteries of various specifications and appearance designs, such as rectangular triangle, elevator, etc., natural ball shell batteries Can be more powerful.

4. Working standard voltage capacity of rechargeable batteries

The working standard voltage is different and the capacity is different. The average 18650 battery capacity can guarantee about 2200ma, so the calculated energy density is about 500wh/l.