18650 battery flat top

　　What are the differences between polymer lithium batteries and 18650 lithium batteries?

　　1. Different types of batteries

　　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 acid zinc-manganese batteries. (referred to as normal-grade batteries). In addition, polymer lithium batteries are known as using 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 high 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 process can change the specifications and appearance design of battery production. It has the characteristics of low cost and good effect. It can make rechargeable batteries suitable for the appearance design according to the specific application regulations of the product, and more suitable for users. The production and processing technology of 18650 lithium-ion batteries is a top line machine, which is a fixed specification and appearance design.

　　3. The size design of lithium battery and 18650 is different

　　The most obvious difference between lithium-ion batteries and 18650 lithium batteries is the appearance design. Polymer lithium batteries are square, and the outer casing is soft-packed batteries; 18650 lithium batteries are cylindrical, and the outer casing is steel, and hard-packed; , 18650 lithium-ion has specifications, the height is fixed, and it can be made into a 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 triangles, elevators, etc., natural kick-off shell batteries Can be stronger.

　　4. The working standard voltage capacity of the rechargeable battery

　　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.