Electrode Roll Coordinate Calibration for Battery Traceability
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Solution Overview
Problem
Existing battery manufacturing processes lack reliability and traceability, particularly in the electrode process, which affects yield and performance.
Innovation Solution
A battery manufacturing system and method that involves unwinding and rewinding an electrode sheet, using a server and programmable logic controller (PLC) to calibrate coordinates and datum points, generating roll maps for improved feedback and feedforward control, and scrapping defective parts based on calibrated coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If coordinate calibration is performed using inverted coordinates and datum point sensing, then manufacturing precision and traceability are improved, but device complexity increases due to additional sensors and control systems
Solution Approach 1:
The patent implements feedback control by using datum point sensors to detect actual positions and comparing them with calibrated coordinate data. The system continuously adjusts and refines coordinate calibration based on sensed datum point positions, enabling precise tracking of electrode sheet movements through feedback loops that correct deviations in real-time.
Solution Approach 2:
The patent introduces datum points as intermediary reference markers on the electrode sheet and datum point sensors as intermediary detection devices. These intermediaries facilitate accurate coordinate calibration by providing measurable reference positions that bridge the gap between the electrode sheet and the calibration system, enabling precise position tracking without direct complex measurement.
2Reliability
If roll maps are generated and stored for feedback and feedforward control, then reliability is improved, but loss of storage capacity occurs
Solution Approach 1:
The patent extracts only the essential calibration data and datum point information needed for manufacturing control into roll maps, storing them in server memory. By extracting and storing only the critical coordinate calibration data and datum point positions rather than complete process data, the system achieves reliable traceability while minimizing storage resource consumption.
3Productivity
If datum point sensing and coordinate calibration are implemented, then productivity is improved through better quality control, but loss of time occurs during calibration processes
Solution Approach 1:
The patent performs coordinate calibration and generates roll maps before actual battery manufacturing begins. By completing the coordinate calibration process in advance and storing the calibrated data for reuse, the system eliminates the need for repeated calibration during production, thereby reducing time loss during manufacturing while maintaining high productivity through pre-established accurate coordinate systems.
Data Source
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AI summary
Example embodiments provide a battery manufacturing system. The battery manufacturing system is configured to unwind an electrode sheet from a first electrode roll and winding the electrode sheet into a second electrode roll, and includes a server configured to store coordinate data of the first electrode roll and datum point data indicating datum points on the first electrode roll, a programmable logic controller (PLC) configured to load the coordinate data of the first electrode roll and the datum point data from the server, and a datum point sensor configured to sense a datum point on the electrode sheet unwound from the first electrode roll and generate a datum point sensing signal, in which the PLC is configured to obtain coordinate data of the second electrode roll by calibrating inverted coordinates of stored coordinates included in the coordinate data of the first electrode roll, based on inverted coordinates of stored datum point coordinates included in the datum point data and a coordinate of the sensed datum point.