Cell Top Cover Laser Sealing With Scanning Beam Weld Control
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Solution Overview
Problem
Conventional continuous sealing welding of cell top covers is limited by motor acceleration and deceleration, resulting in low welding speed and inconsistency in weld pool depth, and lacks visual positioning, weld pool monitoring, and surface quality assessment, leading to suboptimal welding quality and efficiency.
Innovation Solution
A laser welding system employing a scanning laser beam and control device for continuous scanning sealing welding, incorporating BrightLine Welding technology, with integrated positioning, weld pool depth monitoring, and surface quality assessment capabilities, allowing for high-speed welding and improved automation at a single work station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If continuous sealing welding is performed using a solid-state welding head mounted on a linear motor, then the welding can be completed in a closed shape around the cell top cover, but the welding speed is limited by motor acceleration and deceleration at corner positions, resulting in welding speed not exceeding 250 mm/s
Solution Approach 1:
The patent replaces the mechanical linear motor system with an optical scanning system. Instead of moving the welding head mechanically along a predetermined path with acceleration and deceleration, the invention uses a laser beam that can be scanned and directed to different positions optically, eliminating the mechanical inertia limitations and enabling much higher welding speeds while maintaining precision.
Solution Approach 2:
The patent implements dynamic control of the laser beam scanning process, allowing the welding path and speed to be adjusted in real-time based on position feedback. This dynamic approach enables the system to maintain consistent weld quality at high speeds by adapting the scanning parameters, rather than being constrained by fixed mechanical acceleration profiles.
2Manufacturing precision
If motor deceleration is performed at corner positions during continuous sealing welding, then the welding can follow a closed rectangular path, but this causes inconsistency in the weld pool depth, particularly in the corner area
Solution Approach 1:
The patent incorporates feedback control mechanisms that monitor the welding process in real-time and adjust parameters to maintain consistent weld pool depth. By using feedback from position sensors and process monitoring, the system can compensate for variations and maintain uniform welding quality throughout the entire path, including corner areas, without requiring speed reductions.
3Reliability
If laser pre-welding step is performed at a separate work station before continuous sealing welding, then spot welding can be completed, but this requires more investment in equipment, more occupied area, and a more complicated welding system
Solution Approach 1:
The patent merges the pre-welding and continuous sealing welding operations into a single integrated work station. By combining these previously separate processes, the invention eliminates the need for multiple work stations, reduces equipment investment and space requirements, while maintaining comprehensive welding quality through the unified laser scanning system that can perform both spot welding and continuous sealing in one setup.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves significantly increased welding speed up to 10,000 mm/s, enhances welding quality through real-time monitoring and adjustment, and simplifies the process by eliminating the need for multiple work stations, thereby improving efficiency and product consistency.
Implementation Method 1
a laser emitting device for generating a scanning welding laser beam to be irradiated to a portion of the cell top cover to be welded
Data Source
AI summary
A laser welding system for sealing welding a cell top cover includes a laser emitting device for generating a scanning welding laser beam to be irradiated to a portion of the cell top cover to be welded, and a control device for controlling the laser emitting device to perform continuous scanning sealing welding on the cell top cover. The laser welding system is configured to complete the sealing welding of the cell top cover at only one work station.