Decipher The 4 Major Lithium Battery Welding Methods, Understand The Technical Application Of Laser Welding In The Lithium Battery Industry

Lithium-ion battery welding machine is essential to prepare for cleaning before welding. Foreign objects often appear at the upper and lower electrodes. Power-on inspection is necessary when we use the spot welding machine. This is at the point of use. An important part of the welding machine, sometimes electrical equipment may have leakage, of course, our gas system may also have leakage, so we must check before using lithium-ion batteries to ensure the safety of our production conduct.

How many welding methods are there for lithium-ion batteries?

①Wave soldering: essentially a combination of ultrasonic welding and laser welding;

②Ultrasonic welding: the advantage of this method is that welding is simple, but it takes up more space, and the efficiency of grouping modules will be lower;

③Laser welding: At present, this method is the most widely used, but the structure is slightly different;

④ Laser welding of dissimilar metals: This welding method has high group efficiency and high production speed.

Application of laser welding in lithium ion battery industry

Laser welding uses the laser beam as the energy source, and uses the focusing device to condense the laser into a beam of high power density to irradiate the surface of the workpiece for heating. Under the heat conduction of the metal material, the inside of the material is melted to form a specific molten pool. When laser welding is used, the heat-affected zone of the workpiece is small; the welding spot is small, and the welding dimensional accuracy is high; the welding method is non-contact welding, no external force is required, and the product deformation is small; the welding quality is high; the efficiency is high, and it is easy to realize automatic production .

The casing materials of power lithium batteries include aluminum alloy and stainless steel, among which aluminum alloy is the most used, generally 3003 aluminum alloy, and a few are pure aluminum. Stainless steel is the material with the best laser weldability, especially 304 stainless steel, whether it is pulsed or continuous laser, it can obtain welds with good appearance and performance.

With the continuous advancement of technology and process methods, the characteristics of laser as a non-contact flexible manufacturing tool will be more obvious. Laser manufacturing is bound to become an advanced manufacturing technology that is convenient, efficient, environmentally friendly, energy-saving and consumption-reducing, which will promote technological progress and product technological transformation in my country's industrial field, and meet the development needs of the national economy, especially the manufacturing industry.

my country's laser industry is developing rapidly, laser welding has made a breakthrough, and the price of equipment will be further reduced, which will reduce the cost of using laser welding in the production of lithium-ion batteries. Initially, more lithium-ion battery manufacturers will choose laser welding. Laser welding will be more and more widely used in the lithium-ion battery industry and form a new development trend.

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