Program overview Power battery is the core component of new energy vehicles, and its quality directly determines the performance of the vehicle. Lithium battery manufacturing equipment generally includes three types of front-end equipment, mid-end equipment, and back-end equipment. The accuracy and automation level of the equipment will directly affect the production efficiency and consistency of the product. Because of its own technical advantages, laser processing technology is playing an increasingly important role in laser welding, pole piece material cutting, and marking of batteries and modules in the lithium battery industry. Solution advantage 1. Laser welding process From the manufacture of lithium battery cells to battery pack assembly, welding is a very important manufacturing process. The conductivity, strength, air tightness, metal fatigue and corrosion resistance of lithium batteries are Typical battery welding quality evaluation standard. The selection of welding method and welding process will directly affect the cost, quality, safety and consistency of the battery. Among many welding methods, laser welding stands out with the following advantages: First, laser welding has high energy density, small welding deformation, and small heat-affected zone, which can effectively improve the accuracy of parts. The welding seam is smooth and free of impurities, uniform and dense, without additional Grinding work; secondly, laser welding can be precisely controlled, with a small focus spot, high-precision positioning, and easy automation with a mechanical arm, improving welding efficiency, reducing man-hours, and reducing costs; in addition, laser welding of thin plates or thin-diameter wires is not It is as vulnerable to melting back as arc welding. The structure of the battery usually contains a variety of materials, such as steel, aluminum, copper, nickel, etc. These metals may be made into electrodes, wires, or shells; therefore, whether it is welding between one material or between multiple materials , All put forward higher requirements on the welding process. The technological advantage of laser welding lies in the wide range of materials that can be welded and the ability to weld between different materials. 2. The application of tab cutting and laser welding in the manufacture of lithium batteries is also very extensive, running through almost every link of production. The production of lithium batteries, especially power lithium batteries, requires cutting the tabs, but the traditional die-cutting method is not only costly, but also prone to safety problems. During use, the die-cutting knife will inevitably wear out, and then drop dust and produce burrs. Dust and burrs are the main culprits for battery overheating, short circuit, explosion and other dangerous problems. To avoid danger, die cutters need to be replaced frequently. But its price is as high as several hundred thousand yuan or even millions of yuan, so a die-cutting machine will consume several million yuan a year. A lithium battery production line is often equipped with 8 to 10 die-cutting machines, which causes the cost of die-cutting machine consumables to account for a large proportion of the entire production cost of lithium batteries. Compared with the traditional die-cutting method, high-power, online laser cutting has no consumables, which greatly reduces the cost; the second is the fast speed, which can greatly improve the production efficiency; the third is the high flexibility, which can not only change the design of the previous new products , The trial cutting process is shortened from a few months to a few days, and the spacing, size, etc. can also be freely controlled. In terms of cost, the one-time investment only increases by 30%, and the cost can be recovered in a very short time.