Galvanometer Array Calibration for Precision Multi-Tab Laser Cleaning
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Solution Overview
Problem
Current laser cleaning methods for tabs in lithium battery production either have low cleaning efficiency when using a single laser for narrow tabs or poor precision control when using multiple galvanometers for wider frames.
Innovation Solution
A laser cleaning method that involves parallelism correction, parallelism calibration, and distortion correction of galvanometers to form a galvanometer array, which enables simultaneous laser cleaning of multiple tabs with improved control accuracy and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple galvanometers are used to clean multiple tabs on a wider frame, then the cleaning efficiency is improved, but the precision control during the cleaning process deteriorates
Solution Approach 1:
The system divides the cleaning task into multiple independent galvanometer units, each responsible for specific tabs. This segmentation allows parallel processing of multiple tabs simultaneously, improving cleaning efficiency while maintaining individual precision control for each galvanometer unit.
Solution Approach 2:
Multiple galvanometers are merged into a coordinated array system with unified control. The galvanometers work together as an integrated system, sharing common control algorithms and coordinate systems, which enables efficient multi-tab cleaning while maintaining precision through coordinated operation.
2Manufacturing precision
If a single laser is used to clean a narrow tab, then the precision control is maintained, but the cleaning efficiency deteriorates
Solution Approach 1:
The single laser system is segmented into multiple laser sources distributed across different galvanometers. Each laser maintains the precision characteristics of individual laser cleaning while the collective system achieves higher productivity by processing multiple tabs in parallel.
3Area of stationary object
If multiple galvanometers are spliced into an array to clean wider frames, then the cleaning area is expanded, but the parallelism and positioning accuracy between galvanometers deteriorates
Solution Approach 1:
The system transitions from individual galvanometer coordinate systems to a unified multi-dimensional coordinate system that encompasses all galvanometers in the array. This dimensional expansion allows the system to cover wider cleaning areas while maintaining positioning accuracy through coordinate transformation and unification algorithms.
Solution Approach 2:
The system dynamically adjusts and unifies critical parameters including parallelism angles, positioning coordinates, and focal heights across all galvanometers. By standardizing these parameters to meet specific error requirements, the system expands the cleaning area while maintaining consistent positioning accuracy across the entire galvanometer array.
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 method enhances the control accuracy of the galvanometer array, allowing for efficient laser cleaning of multiple tabs on a wider frame while maintaining high precision, thus improving the overall laser cleaning effect.
Implementation Method 1
Laser cleaning for tabs usually involves cleaning the surface coating layer of the pole piece to expose the substrate
Data Source
AI summary
A laser cleaning method for multiple tabs includes: performing a parallelism correction of each galvanometer to be spliced relative to a processing platform; splicing multiple galvanometers into a galvanometer array, performing parallelism calibration between adjacent galvanometers in the galvanometer array; performing a distortion correction on a single frame produced by each galvanometer; splicing multiple single frames corresponding to multiple galvanometers into an entire frame corresponding to the galvanometer array; normalizing a single frame coordinate system corresponding to each single frame into an entire frame coordinate system corresponding to the entire frame; obtaining offset information of a material strip edge of a material strip passing through a laser cleaning device relative to a material strip travel direction, and performing offset compensation on the galvanometer array based on the offset information; and performing laser cleaning simultaneously on multiple tabs on a pole piece by the galvanometer array.