What laser technologies are used in the manufacturing of lithium batteries?

Time:2021-10-11 Views:930
What laser technologies are used in the manufacturing of lithium batteries?

In the first half of 2021, the leading enterprises in all aspects of lithium battery are basically in full production. The demand of the whole industry chain is high and the growth certainty is strong. The prosperity will be further improved in the second half of the year. The dividend of a new round of power battery investment and expansion may last for 3-5 years. At the same time, lithium battery is also facing higher energy storage technology breakthroughs not only in the field of new energy vehicles, but also in the upgrading of 3C electronic products.

In the production and manufacturing process of lithium battery, laser technology is widely used, such as power battery pole piece lug welding, and the application of laser marking technology in lithium battery packaging belt, shell and other scenes.

Application of laser technology in 3C consumer battery lug welding
In the production of consumer battery, it relates to a pole piece welding process, which welds the battery pole piece and the collector piece together. The positive material is the welding of aluminum sheet and aluminum foil, and the negative material is the welding of nickel sheet and copper foil. After welding, it is wound or laminated to make the battery. Many packaging technologies are applied to the actual production process of the battery, such as laser welding, resistance welding, ultrasonic welding, etc.

We are a Howweld manufacturer produce laser machine,including fiber laser welding equipment,laser cleaning machine,laser engraving machine. Appropriate welding methods and optimized process parameters play an important role in saving the production cost of power battery and ensuring its uniformity and reliability. The traditional welding method is ultrasonic welding, which is easy to form false welding, and the welding joint is easy to form loss, and the loss time is unknown, which is easy to lead to large-area defective products.
UV nanosecond laser welding - small heat affected area and good adhesion
Laser welding takes the laser beam as the energy source, uses the focusing device to gather the laser into a high-power density beam to irradiate on the surface of the workpiece for heating, and melts inside the material to form a specific solution pool under the heat conduction of metal materials.

In the field of laser welding, it is subdivided into infrared fiber laser welding and ultraviolet nanosecond welding. Among them, infrared fiber laser welding and negative electrode welding, if spiral welding is adopted, the thermal impact will be large, and if spot welding is adopted, it is easy to produce false welding. Positive electrode welding, if spiral welding is adopted, it is difficult to weld. At the same time, if spot welding is adopted, a lot of false welding will be formed.
UV nanosecond welding is the light source with the best welding effect and the highest welding efficiency. It has the excellent performance of small heat affected area, good adhesion, welding one piece in less than 2S, high welding efficiency and more than 90% tear residue of solder joint.

With the in-depth development of new energy vehicles and a wide range of 3C electronics industry, higher requirements are put forward for the assembly and welding accuracy and quality of supporting batteries. In the future, more precise laser welding technology will be further integrated with the field of power batteries to jointly explore efficient and high-quality solutions of laser technology in different application scenarios.

Laser marking technology -- effectively help power battery track and trace the source

Battery production involves many links, including raw material information, production process and process, product batch, manufacturer and date, etc. How to effectively trace the whole process of lithium battery? The key information needs to be stored on the battery in the two-dimensional code for identification, while the traditional ink jet code technology has problems such as easy friction and easy loss of information for a long time, while the UV marking technology has the characteristics of strong permanence, high anti-counterfeiting, high precision, strong wear resistance, safety and reliability, and will not disappear due to environmental relations for a long time, It is a high-quality solution for marking in the battery industry.
Above content writed by Howweld.Howweld Team provide laser processing equipment with service,provide suitable laser welding,laser cleaning solution.Contact email:info@howweld.com
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