As we all know, the power battery is the core component of the electric vehicle, and its performance directly affects the performance of the electric vehicle.

Lithium-ion batteries are mainly used in power batteries. Lithium-ion battery modules are directly applied to automobiles. Lithium-ion battery modules refer to the combination of lithium-ion batteries combined in series and parallel, plus a protective circuit shell.

The welding technology and process of lithium battery modules are important factors affecting the performance and safety of power batteries.

Domestic battery module production standards are not uniform, and welding methods are also different. At present, resistance welding, laser welding and ultrasonic welding are mainly used. The advantages and disadvantages of these three methods are mainly introduced below.

1. Resistance welding

Resistance welding has been applied in the market earlier and the technology is mature. The equipment of resistance welding has a price advantage, but the disadvantage is that a lot of heat will be generated during the welding process, which is easy to cause damage to the lithium battery, and it needs to be cleaned after welding. Rework is not possible.

2. Ultrasonic welding

The advantages of ultrasonic welding are that it does not require heating, can detect whether the solder joints are firm in real time, and does not need to be cleaned after welding, but the disadvantage is that the welding surface cannot be contaminated, and the types of weldable materials are limited.

3. Laser welding

The obvious advantages of laser welding are fast welding speed, high efficiency, small heat affected zone, and small deformation of the workpiece, but the disadvantage is that the equipment is expensive.

HGLASER is a professional manufacturer of laser welding equipment. It has successful cases in battery module welding. It can assist customers in equipment selection and process improvement, and provide customers with a complete set of welding solutions.

The electric vehicle market has driven the rapid development of the lithium battery industry, and the lithium battery equipment industry has ushered in a favorable period of development. Battery module welding On the whole, laser welding has more advantages. In the case of large battery demand, laser welding has high efficiency and high yield, which makes it more widely used in module welding, and laser welding technology is also gradually mature.