Electrode Roll Map Calibration for Defect Tracking Accuracy
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Solution Overview
Problem
Existing systems lack the ability to generate a roll map that includes comprehensive information about the quality and defects in the electrode manufacturing process of secondary batteries, which hinders effective feedback, feedforward, and tracking of the manufacturing process.
Innovation Solution
A roll map generating method that involves cutting an electrode sheet between an unwinder and a rewinder, identifying a calibration section, assigning data to a roll map, and calibrating coordinates based on completed and offset lengths to create a roll map that includes quality and defect information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a roll map generation system is implemented to track quality and defect information, then manufacturing precision and quality control are improved, but device complexity increases due to the need for coordinate calibration and data assignment mechanisms
Solution Approach 1:
The system performs preliminary coordinate calibration by identifying a calibration section on the electrode sheet before main production. This advance preparation establishes the coordinate system and offset lengths, simplifying subsequent data assignment and tracking operations without requiring complex real-time calculations during manufacturing
Solution Approach 2:
The patent introduces a calibration section as an intermediary element between the sensing part and the main production area. This calibration section serves as a reference mediator that enables accurate coordinate mapping and data assignment, reducing the complexity of direct measurement and tracking systems
2Measurement precision
If coordinate calibration is performed using completion length and offset length, then measurement precision is improved, but loss of time occurs during the calibration process
Solution Approach 1:
The coordinate calibration is performed as a preliminary action during setup or initial production phases. By completing the calibration process beforehand using the calibration section, the system establishes accurate coordinate references that can be reused throughout production, minimizing repeated calibration time while maintaining measurement precision
Solution Approach 2:
The system creates a copied reference coordinate system through the calibration section, which replicates the relationship between physical position and coordinate values. This copied reference enables accurate measurement without requiring complex real-time calculations, reducing time loss while maintaining precision
Data Source
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AI summary
A method for generating a roll map includes: cutting a cutting position of an electrode sheet that moves between an unwinder and a rewinder so as to provide a first lot; and identifying a correcting section of the electrode sheet. The correcting section is between the cutting position of the electrode sheet and a portion of the electrode sheet sensed by a sensing unit at the time the electrode sheet is cut.