Advantages of HCSEL laser welding module
The advantages of laser welding are outstanding, and the permeability will continue to increase
Laser processing is an efficient and precise processing method. Thanks to the full localization of fiber lasers, laser processing has developed and popularized rapidly in China in recent years. "Non-contact processing" and "high energy density" are important characteristics of laser processing, which makes it have innate advantages such as high efficiency, high precision, low energy consumption, small material deformation and easy control compared with traditional processing methods. Laser processing equipment is widely replacing various traditional processing equipment, such as laser marking machine instead of oil ink inkjet printer, laser cutting machine instead of flame cutting equipment, laser welding machine instead of traditional welding equipment, etc. In emerging manufacturing industries such as panels, semiconductors, and lithium batteries, laser equipment has also been increasingly used. According to statistics from the US Office of Science and Technology Policy, in 2010, 50% of US GDP was related to the application and expansion of laser technology, and the proportion in China was about 10%-15%, and the industry growth space is still broad.
Of all laser machines, about 60% are used in industrial processing. Welding is one of the main scenarios of laser industrial applications, which is an efficient and precise welding method that uses a laser beam with high energy density as a heat source.
We expect that the scale of China's laser welding equipment industry will continue to grow rapidly in the future, mainly based on the following points: First, as an emerging welding method, the penetration rate of laser welding in China is still very low, and the room for improvement is large. According to the statistics of the China Electrical Equipment Industry Association (Welding Machine Branch), the output of various types of welding machines in China in 2020 was 11.09 million units. The operating income of United Win Laser in 2020 was 878 million yuan, while the market size of China's excitation welding equipment in that year was 5.12 billion yuan; According to the announcement of United Win Laser, in 2020, United Win Laser produced a total of 701 lasers and welding machines; If it is simply assumed that the sales market share of United Win Laser in the field of laser welding equipment is about equal to its production (sales) market share, it is estimated that the penetration rate of laser welding equipment in electric welding machines in China in 2020 is less than 1%. In the long run, with the continuous maturity of technology and the continuous decline in the cost of core components, the penetration rate of laser welding will continue to increase.
Advantages of laser welding
Compared with the traditional welding process, laser welding has significant advantages in terms of accuracy and efficiency. Lasers are mainly used for melting welding, and in a few cases can also be used as a heat source for brazing, and are hardly used for pressure welding. Compared with the traditional welding process, laser welding has the following characteristics and advantages:
(1) Adapt to a wider range of materials: laser welding is not only suitable for the welding of carbon steel, but also more suitable for the welding of non-ferrous metals such as aluminum and copper, especially thin aluminum plates and other materials with high requirements for welding accuracy; Based on emerging technologies such as micro-nano laser and ultrafast laser, laser welding can even be applied to welding between plexiglass;
(2) Greater aspect ratio: laser welding has higher power density, which can achieve more than 10 times the aspect ratio, and the welding strength of high-power laser for thick plates is higher than that of resistance welding;
(3) Smaller thermal deformation: higher power density also makes the weld seam of laser welding narrower, the heat affected zone smaller, and because laser welding is non-contact processing, the thermal deformation during welding is smaller;
(4) Higher welding quality: under suitable gas protection, the quality of laser welds is higher, and the connection strength is significantly higher than that of arc welding and resistance welding;
(5) It is easier to achieve automation: laser welding belongs to non-contact processing, which is easier to automate.
In the automotive field, many models use laser welding as a selling point, such as Volkswagen, Audi, Mercedes-Benz and so on. Volkswagen applied laser to the welding of the top of the body-in-white, because the laser welding nearly perfect appearance and good sealing, so that it no longer needs to use sealing strips at the weld, and the welding strength and service life in the wet environment are significantly improved.
In the field of power batteries, laser welding has also quickly replaced other welding methods with the advantages of high efficiency and high quality, and has become the standard equipment of power battery production lines. At present, in the production of power batteries, the use of laser welding mainly includes: middle process: welding of tabs (including pre-welding), spot welding of pole belts, pre-welding of battery cells into the shell, sealing welding of the top cover of the shell, sealing welding of the liquid injection port, etc.; Back-end process: including welding of connecting plates during battery PACK modules, and welding of explosion-proof valves on the cover plate behind the module.
Advantages of HCSEL laser welding module -LEMON Photonics
Based on Lemon Photonics' exclusive HCSEL laser chip technology, a series of high-power laser welding heads from 100 watts to 5,000W are developed.
The HCSEL chip is used to have high luminous efficiency, high power density, and the output light type is easy to secondary optical shaping. It can face the different requirements of laser output light type in welding for different applications, and design the spot of different output light type in a targeted manner, while improving the power density, customize a more optimized output spot, which greatly improves the welding quality and welding efficiency.
Due to the simple structure of the secondary optical design of high-power HCSEL lasers, the overall manufacturing cost and subsequent maintenance costs of laser welding equipment can be effectively reduced. Advantages of HCSEL laser welding module -LEMON Photonics.
