Electrode Seam Cause Detection in Roll-to-Roll Roll Maps
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Solution Overview
Problem
Existing electrode manufacturing processes struggle to accurately determine the cause of electrode connections or seams formed during the roll-to-roll process, which hinders quality tracing and defect analysis in secondary battery production.
Innovation Solution
An electrode connection cause determination system that includes a position measuring instrument, signal generator, seam detector, and determination unit to identify the cause of electrode connections by detecting seams within a predetermined distance from a generated connection notice signal, and a roll map generation system to display these causes on a simulated electrode map.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only a seam detector is used to identify electrode connections, then the position of seams can be detected, but the cause of seam occurrence cannot be determined
Solution Approach 1:
The system segments the seam detection function into multiple specialized detectors: a seam detector for identifying seam positions, a breakage detector for detecting electrode breakage, and a splicing detector for identifying splicing operations. Each detector focuses on a specific aspect, allowing comprehensive cause identification while maintaining detection precision.
Solution Approach 2:
The determination unit serves as a multi-functional component that integrates data from multiple detectors (seam detector, breakage detector, splicing detector) and the position measuring instrument to universally determine various causes of electrode connections. This single unit handles multiple detection functions and coordinates them to provide comprehensive cause analysis.
2Measurement precision
If multiple detectors and determination units are added to identify seam causes, then cause determination accuracy is improved, but system complexity increases
Solution Approach 1:
The system merges multiple detection functions (seam detection, breakage detection, splicing detection) into a coordinated detection network, all feeding into a single determination unit. The position measuring instrument is integrated with the detection system to provide unified coordinate information. This merging approach maintains high determination accuracy while reducing overall system complexity through functional integration.
Data Source
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AI summary
An electrode connection cause determination system includes a position measuring instrument. The position measuring instrument is configured to, when an electrode moves between an unwinder and a rewinder in a roll-to-roll state, acquire coordinate value data corresponding to a longitudinal position of the electrode determined according to a rotation amount of the rewinder. The system includes a signal generator configured to generate a connection advance notice signal if the electrode includes a connecting portion corresponding to a cause event, a seam detector configured to detect a seam attached onto the electrode after the connection advance notice signal is generated, and a determination unit configured to, when the seam is detected within a predetermined distance from a first coordinate value of the electrode corresponding to a time point when the connection advance notice signal is generated, determine that a connection cause of an electrode connection by the seam corresponds to the cause event.