HanWei Laser welding machine for Current Collecting Plate of Cylindrical Cells   The ​current collector disc​ in cylindrical batteries (e.g., 4680 specification) is a critical conductive component connecting the ​core tabs​ to the ​battery casing/cap​ . Has a significant impact on battery performance. It must simultaneously fulfill: 1.​Low-resistance conduction​ Ensure efficient current transfer from core tabs to battery terminals, minimizing electrical losses 2.​Structural support​ Resist deformation during assembly (e.g., internal stress during casing insertion) and maintain ​welding zone planarit. 3.​Thermal management​ Reduce heat transfer to the ​separator during welding to prevent burn-through-induced short circuits. 4.​Electrolyte infiltration​ Accelerate electrolyte filling via ​through-holes​ or ​flow guide channels, enhancing electrode wetting efficiency ​Welding Technology Challenges : Welding is a critical process in current collector disc manufacturing, facing the following key issues: 1.​Burn-through​ : Excessive heat input penetrates the thin collector disc, damaging structural integrity. 2.​Weld deviation​: Misalignment during high-speed welding compromises electrical conductivity and mechanical strength. 3.​Thermal management​ : High welding temperatures risk ​thermal damage to the separator​, potentially causing short circuits. 4.​Structural deformation​: Residual stress from welding or assembly pressure warps the disc, degrading ​welding zone planarity​. 5.​Weld reliability​ : Narrow process windows (e.g., for copper discs) increase risks of cold welds or brittle intermetallic compounds. Traditional ​Solutions : 1.​Black coating treatment​ : Enhances laser absorption efficiency by ​**>30%​**, reducing heat input and burn-through risk. 2. Optimizing welding parameters: 2-1.Laser power/pulse control to limit heat diffusion to the separator. 2-2.Turret flying welding systems (e.g., ​Newlas' 200°/s high-speed welding) ensure precision under dynamic conditions. 3.​Enhanced inspection: Real-time monitoring of lens contamination, power stability, and weld depth via closed-loop systems (e.g., ​Newlas' intelligent station compensation). 4.​Structural reinforcement: Radial/circular ribs resist deformation during casing insertion. 5.​Material optimization: Surface treatments (e.g., nickel plating) and thickness adjustments improve weldability.             HanWei Laser welding technology solution for Current Collecting Plate of Cylindrical Cells   HW-AMB-ECO laser welding technology achieves efficient, precise, and reliable welding results through its unique laser beam design and energy control. It is an advanced welding technology with broad application prospects :