In the manufacturing process of new energy vehicle (NEV) power batteries, sealing pin welding is a critical step. After the electrolyte is injected into the battery, a laser is used to weld the sealing pin, isolating the entire roll core from the outside to ensure the battery’s integrity and airtightness. As a result, the welding process places high demands on the laser welding equipment, with battery manufacturers typically requiring a first pass yield of over 99.5% for sealing pin welding.
To address these market needs and challenges, Han’s Photonics, a wholly owned subsidiary of Han’s Laser, has introduced its third-generation annular spot fiber laser. This advanced laser offers exceptional beam quality, stability, and consistency, meeting the stringent customer requirements for a first pass yield of over 99.5%. Additionally, Han’s Photonics provides optional pre-welding, in-process, and post-welding inspection systems to ensure the highest level of safety and quality control.
Core Technological Breakthroughs
The complete system consists of the laser, welding control cabinet, and galvanometer welding head. The welding control card, developed by Han’s Laser, enables real-time monitoring and calibration of the welding power. This ensures that the laser operates continuously and efficiently for 24 hours without compromising performance. The fiber laser products from Han’s Photonics have been extensively validated in customer environments, with a welding pass rate exceeding 99.5%.
Welding Control Cabinet and Galvo System
Product Advantages
Low Heat Input and Minimal Spatter
The fiber laser’s low heat input reduces the risk of thermal damage to the workpiece while producing minimal spatter, making the welding process cleaner and more efficient.
Fewer Welding Porosities and Attractive Weld Profiles
The laser ensures smooth, aesthetically pleasing weld seams with fewer gas pores, improving the overall appearance and reliability of the welded components.
Power Closed-Loop Control System Software Interface
Stable and Consistent Welding Energy
The laser delivers consistent energy output, enhancing the quality and repeatability of the welds.
Comprehensive Quality Control with Inspection Systems
Optional pre-welding, in-process, and post-welding inspection systems provide comprehensive monitoring of the welding process, ensuring the highest quality standards are met.
Power-Time Stability Data
High Welding Speed and Efficiency
The high speed and efficiency of the welding process significantly improve production throughput, making it a cost-effective solution for manufacturers.
Actual Application Case
Single Spot Welding Schematic
Annular Spot Welding Schematic
Continuous Upgrades of Annular Spot Technology
Welding Performance and Process Results Continuously Improved
This case uses Han’s Photonics HLW-2000/2000-ABS fiber laser products, with the welding head being Han’s STER Galvanometer Welding Head.
| Laser | Optical Configuration of the Welding Head | ||
| 2000/2000W | Fiber core diameter (μm) | Focus (mm) | Collimation (mm) |
| 100/300 | 350 | 100 | |
Sealing Pin Samples and Sample Testing Analysis
Welding Process Requirements and Experimental Materials
Welding Parameters
| Inner Ring Power | Outer Ring Power | Defocus | Speed | Material |
| 1000W | 1080W | 5 | 40mm/s | AL3003 |
Metallographic Display
Melting Depth: 0.64mm
Melting Width: 1.073mm
CPK: >1.7
Welding Speed: ≥40mm/s
Conclusion
Han’s Photonics’ third-generation annular spot fiber laser provides a state-of-the-art solution for sealing pin welding in new energy vehicle batteries, achieving a first pass yield greater than 99.5%. With superior performance, low heat input, minimal spatter, and high consistency, this solution offers a comprehensive approach to improving the efficiency, quality, and safety of the welding process. As the demand for new energy vehicles continues to rise, Han’s Photonics remains at the forefront of providing reliable, high-quality welding solutions that meet the most demanding industry standards.