Lithium Battery Revolution At The Right Time, Which Track For Laser Enterprise Layout?

Lithium batteries, also known as lithium-ion batteries, is a kind of relying on lithium ions (Li +) in the positive pole and the negative level to move between the purpose of charging and discharging a secondary battery. Lithium battery production and manufacturing, is an important piece of the puzzle in the field of new energy, but also a new industry in the ascendant. 2022 China's lithium battery shipments reached 750GWh, an increase of more than 130% year-on-year, and this market is far from saturated, there is still a great deal of room for growth.
Unprecedented development of the lithium battery industry scale, but also for the laser to break through the status quo in the volume, extending the downstream applications provide new opportunities. Below we look at the production and testing from both ends of the laser can provide what "a helping hand" in the field of lithium batteries.
Production side
First from the production side to talk about. The positive and negative plates of lithium batteries are multi-layer sheet composite electrode design, which has a lot of uneven micro-structures, due to mechanical wear and design inflexibility considerations, these micro-structures are usually not very suitable for ordinary processing. According to related research, the MOPA pulsed fiber laser is more suitable.
Li-ion battery electrode lugs are usually composed of three materials: aluminum for the positive electrode and nickel or copper-nickel plated for the negative electrode. To achieve the perfect docking of copper, aluminum, nickel and other metals, while lithium batteries are also used by the temperature and electrolyte leaching challenges. Ensuring stability in the face of the two major challenges of dissimilar materials welding and susceptibility to corrosion also requires laser welding with high welding efficiency, high processing precision, and a large weld depth-to-width ratio to solve. At the same time, the weight of the battery cell can not be too excessive, the shell and the overall design is to make sure that the lightweight, laser welding can be in the micron scale to achieve high-strength welding, in line with the structural needs of the battery design.
Laser processing is also required for the processing of the pole lugs. As the traditional die-cutting is prone to wear and tear or dust fall, thus affecting the quality of the battery, while the lithium battery itself is prone to thermal runaway defects, so the use of precision laser cutting can better maintain quality control and stability.
In the manufacturing process, positive and negative collectors in the coating of electrode materials, need to clean off the graphite and lithium metal oxides on the top of the copper or aluminum foil, but also to ensure that the metal foil itself does not have an impact. Mechanical means of direct scraping is easy to damage to the metal, then you need to use laser cleaning to solve the problem. Laser cleaning has the advantages of green, high efficiency, good cleaning effect, high purity copper foil exposed after the completion of cleaning, can achieve the demand for welding to the pole ear.
After the completion of manufacturing, in order to carry out product information traceability and process control, it is necessary to mark the key information in a conspicuous position that is clear, complete and permanently visible. At this time, laser marking has the advantages of strong permanence, high anti-counterfeiting, high precision, wear resistance, safety and reliability, etc., in line with the needs of lithium battery marking.
Detection end
As a sensitive component, the quality inspection of lithium battery after the completion of the production process is also essential. In this process, laser scanning microscope can be utilized to observe the internal structure and physical process of lithium battery. By studying the distribution of lithium ions in the electrode material, it is possible to understand the migration behavior of lithium ions and the internal state of the battery.
To troubleshoot the thickness and damage of lithium-ion battery electrode, a high-precision lithium battery laser thickness gauge can be used to measure the thickness by laser triangulation, and such a non-contact, non-destructive measurement is more suitable for the promotion and application of scale production enterprises.
Summary
Laser and lithium battery industry is closely related to the whole process, recently, Jie Pu Te, Li Yuan Heng, Lianyin laser and other enterprises have laid out the new energy, lithium battery plate, respectively, invested heavily in heavy attention to the laser welding machine, laser die-cutting machine, MOPA pulsed fiber laser R & D and industry match, and with the Ningde Times, BYD, Hive Energy, Xinwanda and other famous enterprises in the industry to reach a depth of cooperation. Visible for the laser industry's involutional status quo, laser companies in the optimization of technology and services at the same time, but also need to pay more attention to the industry wind mouth, "research to use", to maintain a high degree of sensitivity to the downstream industry applications, to grasp the fleeting opportunity to enter the game.