As the core parts of new energy vehicles, the quality of lithium battery materials directly affects the performance of new energy vehicles. The high-speed development of the market constantly puts 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, it plays an increasingly important role in the laser welding cell and lithium battery industry, such as the cutting of electrode materials.
Taking the cutting process of power lithium battery lug as an example, the traditional die cutting method is not only costly, but also prone to safety problems; Because laser cutting does not consume materials and is fast, it has greater flexibility in product design. 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 to deal with lithium batteries, and many enterprises have also strengthened the layout of lithium batteries in the field of laser.
At present, the power cell bare core forming process commonly used in the lithium battery industry can be divided into two types: winding and lamination. The electrode lug forming process can be formed by laser die cutting technology.
Laser die cutting technology of lithium battery
Laser die cutting machine has the following advantages:
Good cutting effect: small heat affected zone, small burr, good section flatness and consistency;
High cutting efficiency: laser cutting efficiency is 1-3 times that of traditional metal processing, and 4-6 times is under development;
Long working life: the service life of the laser can reach 100000 hours (about 10 years);
Wide range of applications: it can be compatible with the ear piece forming of the pole piece in the winding and lamination process, and the cutting pattern is flexible;
More convenient conversion: realize one key conversion by calling parameters;
Low maintenance cost: product or process change only requires parameter setting, which can save the cost of replacing the mold.
In addition, effective protection and treatment have been carried out for cutting dust, splash, burr and other problems that users are generally concerned about, so that the yield rate can meet the requirements of customers.