Electrode Roll Map Compression for Battery Traceability

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Solution Overview

Problem

Existing secondary battery manufacturing systems lack effective methods for retrieving and tracing the history data of electrode production processes, which affects the reliability and yield of battery cells.

Innovation Solution

A roll map storing method that includes transmitting and modifying compressed measurement data to generate modified data, and a roll map extracting method that joins coordinate-related cell ID data with compressed measurement data to improve traceability and reliability of electrode production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If compressed measurement data is transmitted and stored without modification, then data storage efficiency is improved, but data accuracy and traceability deteriorate

Engineering Contradiction:

Improvedata storage efficiencyVSAvoiddata accuracy

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The measurement data is segmented into multiple sections along the electrode sheet, with each section having its own representative value. This segmentation allows the system to store compressed data efficiently while maintaining the ability to retrieve specific section details when needed, thus balancing storage efficiency with data accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system changes the parameter representation by storing compressed measurement data with modified coordinates and representative values instead of raw data. This transformation maintains the essential information needed for traceability while reducing the overall data volume, resolving the contradiction between storage efficiency and data accuracy.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If measurement data is compressed to reduce data volume, then data processing speed is improved, but traceability between roll map and intermediate products deteriorates

Engineering Contradiction:

Improvedata processing speedVSAvoidtraceability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent introduces an intermediary coordinate system that links the compressed measurement data to the intermediate products. By maintaining coordinate-related cell ID data as an intermediary, the system enables traceability between the roll map and intermediate products even when the measurement data is compressed, thus resolving the contradiction between processing speed and traceability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system creates a copied and simplified representation of the measurement data (compressed form) while maintaining the ability to reconstruct or reference the original data through stored coordinates and representative values. This copying approach enables fast processing of compressed data while preserving traceability information.

Inventive Principle:

Principle #26Copying

3Loss of information

If detailed measurement data is stored for every section, then data completeness is improved, but system complexity increases

Engineering Contradiction:

Improvedata completenessVSAvoidsystem complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

Instead of storing complete detailed measurement data for every section, the system applies partial action by storing only the essential representative values and coordinates for each section. This selective storage approach maintains data completeness for traceability purposes while significantly reducing system complexity compared to storing all raw measurement details.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP4708069A1Method for storing roll map and method for extracting roll map

Publication Date: 2026.03.11 LG ENERGY SOLUTION LTD

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AI summary

Example embodiments of the present technology provide a roll map storing method. The roll map storing method includes transmitting compressed measurement data, which is generated by processing measurement data collected by measuring an electrode sheet, to a server, modifying the compressed measurement data to generate modified measurement data, and storing the modified data, in which the compressed measurement data includes a first measurement start coordinate, a first measurement end coordinate, a first representative value of a first section defined by the first measurement start coordinate and the first measurement end coordinate, a second measurement start coordinate, a second measurement end coordinate, and a second representative value of a second section defined by the second measurement start coordinate and the second measurement end coordinate, and the first measurement start coordinate and the second measurement start coordinate are the same.