Battery pole ear is a raw material of lithium-ion polymer battery products. Many of our daily necessities have used it, such as mobile phone battery, Bluetooth battery, laptop battery and so on. Today we are going to talk about precision welding of battery pole lug.

The battery is divided into positive and negative electrodes, and the pole ear is the metal conductive body that leads from the positive and negative electrodes in the battery core. Simply put, it is the contact point of the positive and negative ears of the battery when charging and discharging. This contact point is not the copper sheet we see on the outside of the battery, but a connection inside the battery. The anode ear is divided into three kinds of materials. The positive electrode of the battery uses aluminum material, the negative electrode uses nickel material, and the negative electrode also has copper-plated nickel material. Both of them are composed of two parts: film and metal belt. And the package is heated (about 140 degrees Celsius) and aluminum mold hot melt seal bonded together to prevent leakage, a pole ear is made of two pieces of film sandwiched between the metal belt. The films used in the market are vinyl, white glue and single layer glue.

Lithium battery is a power source power supply for power tools, generally for electric vehicles, electric bicycles and other electronic equipment to provide power battery, because of its long life, large capacity, small size, light weight and other advantages, so it is widely used in a variety of fields.

In the assembly process of lithium battery, the battery and pole lug are first welded, and then the nickel sheet is welded. Before the pole lug and nickel sheet are welded, OCV test is conducted on the battery, the pole lug is trimmed and cut, and then the nickel sheet is welded.

Laser welding energy and spot position can be precisely controlled, especially suitable for precision machining. For the small lithium battery in the field of consumer electronics, laser welding machine is mainly used in the industry.

Xin De laser gantry continuous laser welding machine

The equipment adopts gantry structure, 1500-6000 watt fiber laser, its laser life is long, the current photoelectric conversion energy of the highest laser, the welding path of the equipment can be freely modified, simple and convenient operation, showing great advantages in the lithium battery pack welding process.

Suitable for new energy lithium battery to nickel, copper aluminum connection sheet, pole lug, pole, explosion-proof sheet, junction bar connection sheet, square shell and polymer to nickel power battery pack laser welding.