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The production process of battery tabs

2021-07-23

I think everyone is very curious about what a lug is and how it is produced.

Tabs are the raw materials of lithium-ion polymer battery products, such as mobile phone batteries, Bluetooth batteries and laptop batteries used in our lives require tabs. The battery is divided into positive and negative tabs. Generally speaking, the positive and negative electrodes are led out of the battery. The metal conductor of the battery, the ears of the positive and negative electrodes of the battery are the contact points during charging and discharging.

This contact point is not the copper sheet on the outside of the battery we see, but a connection inside the battery. The tabs are divided into three materials. The positive electrode of the battery uses aluminum (Al) material, the negative electrode uses nickel (Ni) material, and the negative electrode also has nickel-plated copper (Ni-Cu) material.成, as shown in Figure 1.

The film is the insulating part on the tab. Its function is to prevent the short circuit between the metal tape and the aluminum plastic film when the battery is packaged, and it is heated (about 140 ℃) and the aluminum plastic film is heat-melt sealed to prevent it from being bonded together during packaging. Leaking. A lug is sandwiched between a metal band by two pieces of film.

Currently, there are three types of films used in the market: vinyl, white and single-layer glue. The commonly used black film has a three-layer structure: melanin, with a melting point of 66°C; PE, with a melting point of 105°C; PP, with a melting point of 137°C. The finished packaging of the tabs is divided into reel type (the whole metal belt passes through the equipment and the film is wound into a reel) and plate type (the metal belt is added with the film and cut into a single piece, and then placed in a row for two A thin transparent plastic sheet is sandwiched in between.

The production process also has a great influence on the performance of the power tab. The company's production technology is very mature, and after continuous improvement and testing, it has reached a relatively stable state. The product performance is very good, has patents, and is trustworthy.


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