Power battery industry competition into the second half of the industry consensus that the current power battery industry chain is in a structural, stage overcapacity stage, to lead the power battery industry through R & D innovation, cost reduction and efficiency, such as high-quality, global development. Light to technology in order to comply with the development of the law of the lithium industry, for the lithium industry into a new cycle of judgment and response path, the development of a number of industry-leading technology lasers, in the battery manufacturing process, especially the application of welding process, the advantages are significant.
Recently, Yuan Jianwen, the process leader of Light to Technology, made a report entitled "Breakthrough of high power MOPA fiber laser in the field of lithium welding" at the Gaogong Lithium Summit, sharing some of the recent new technologies and breakthroughs applied in the lithium industry.
The advantages of high power MOPA laser welding process are obvious
MOPA lasers are applied to the welding process in the lithium industry, mainly in the form of spiral wire and stack welding. High power MOPA pulsed single mode laser with its excellent beam quality, wide range of pulse width selection, high single pulse energy, the ability to switch between pulsed and continuous mode at will, no fear of high reflection and other advantages, suitable for copper, aluminum, nickel, steel from thin to thick any two material combinations of stack welding, especially for heterogeneous materials, high thermal impact requirements, high back trace requirements, the risk of penetration welding scenarios, MOPA is particularly advantageous.
Compared with continuous laser, MOPA welding has the advantages of good beam quality, high peak power, and a wide range of pulse width options. In the actual process application, aluminum welding steel, aluminum welding copper, aluminum welding aluminum and other scenarios can achieve effective connection. In 4695 large cylindrical battery sink welding, Light to Technology has achieved mature application, in 4680 module welding application also test completed.
The main advantages of MOPA laser in lithium industry welding process
The cutting process of high power MOPA laser in the lithium industry is mainly used in the field of pole lug cutting, pole piece cutting, battery module disassembly, etc. And the capacity and efficiency of the lithium industry are strongly correlated with the development of laser technology and the improvement of power band performance.
With the development of long cell battery technology, the length of the cell pole piece will basically be greater than 300mm, which can ensure the cutting effect and the uniformity of the overall length, high power MOPA is particularly useful in this regard.
Battery dismantling in the lithium industry is an application that is easily overlooked, Light to Technology has focused on this aspect with a number of industry customers to carry out technical research, to achieve better dismantling results recognized by customers. From the previous hammer "violent" dismantling to the current laser "quiet" dismantling, laser power also from the early single-mode 500W into today's efficiency multiplied single-mode 1000W.
The laser cleaning process in the lithium industry is manifested in the pole piece cleaning, blue film (paint) cleaning, battery pole column / injection hole cleaning, battery aluminum case cleaning, etc.. Each of these processes is extremely demanding on the application of laser technology. In order to meet these stringent technical requirements, Light to Technology has targeted the development of each process to produce different types of lasers that are more suitable for the cleaning process in the lithium industry.
