Superwave Laser Scanner Welding Machine

The demand for battery energy storage and battery life is increasing in the market, and the weight and cost of batteries are getting lower and lower. Batteries are usually contain many kinds of materials, such as zinc, steel, aluminum, copper, titanium, nickel, etc., some metal can be made into electrodes, wires, or shell, based on the consideration of weight and cost minimization, they should be as thin as possible so that more new battery design material thickness range is between 25 to 250 microns. The electrical conductivity, strength, air tightness, metal fatigue and corrosion resistance of each battery are typical of welding quality.

Laser welding has always been an indispensable process in the process of lithium electric manufacturing. All kinds of materials are used in laser welding, such as stainless steel shell, aluminum shell, polymer etc. Laser welding of high speed is unmatchable by other welding technology, with the continuous development of industry, efficiency and quality of laser welding is put forward higher request, fiber laser has pushed the high-speed welding, the weld can be realized at low heat input and high solidification speed, can effectively control in hybrid welding of metal solidification defects.

The most easily cracked weld metal combinations are copper and aluminum, which also happens to be one of the most commonly used metal combinations in lithium-ion batteries. Optical fiber laser welding in this important metal welding process shows the characteristics of no crack welding. Other metal combinations that need to be used or are not common can also be done using laser welding, especially when the solidification speed is high. In the end, as long as the weld metal composition is able to realize, the crucial point is to assess their performance in the expected battery application ability (especially the strength, toughness, metal fatigue and corrosion resistance).