A brief introduction to the laser cutting process for lithium batteries

As the core components of new energy vehicles, the quality of lithium battery materials directly affects the performance of the whole vehicle of new energy vehicles. The rapidly developing market has continuously put forward higher requirements for the processing technology, equipment accuracy and automation level of new energy vehicles. Due to the technical advantages of laser processing technology itself, it has played an increasingly important role in the laser welding battery cell and lithium battery industry, such as pole piece material cutting.

Take the cutting of power lithium battery pole ear as an example. The traditional die-cutting method is not only costly, but also prone to safety problems; while laser cutting has greater flexibility in product design because it does not consume materials and has a fast speed. It can greatly reduce production costs, improve production efficiency, have higher accuracy and yield, shorten the die-cutting cycle of new products, and can be applied to products of different varieties and specifications. Laser technology is becoming the best solution for processing lithium batteries, and many companies have also strengthened the layout of the field of lithium battery lasers.

The common power battery bare core forming processes in the current lithium battery industry are roughly divided into two types: winding and lamination. Among them, the ear forming process can be formed by laser die-cutting technology.

Laser die-cutting machinehas the following advantages:

Good cutting effect: small heat-affected zone, small burrs, and good cross-section flatness and consistency;

High cutting efficiency: laser cutting efficiency is 1-3 times that of traditional hardware processing, and 4-6 times is under development;

Long working life: the service life of the laser can reach 100,000 hours (about 10 years);

Wide application range: compatible with the ear forming of the pole piece of winding and lamination process, and the cutting pattern is flexible and changeable;

Conversion is more convenient: one-key conversion is achieved by calling parameters;

Low maintenance cost: product or process change only requires parameter setting, which can save the cost of replacing molds.

In addition, effective protection and treatment are carried out for the problems of cutting dust, splashing, burrs and other problems that users are generally concerned about, so that the yield rate meets the customer's requirements.