Electrode Plate Pressing Measurement for Battery Loading Accuracy

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Solution Overview

Problem

The existing methods for determining the loading level reduction amount in the manufacturing of secondary battery electrodes are inaccurate and unreliable due to the use of punched samples and manual measurements, which affect the battery's capacity.

Innovation Solution

An apparatus and method using a measurement module with first and second measurement units to measure the physical properties of the electrode plate before and after pressing, and a processor to calculate the change in coating material caused by stretching, ensuring accurate determination of the loading level reduction amount.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If punching machine is used to extract samples from specific sections of electrode plates, then the measurement process is simplified, but the accuracy of calculating loading level reduction amount is reduced

Engineering Contradiction:

Improvemeasurement process simplicityVSAvoidloading level reduction amount accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The electrode plate is divided into multiple measurement sections, with each section measured independently by separate measurement units. This segmentation allows comprehensive coverage of the entire electrode plate surface while maintaining systematic and organized data collection, resolving the contradiction between measurement simplicity and accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The measurement system is designed to measure the entire electrode plate surface rather than relying on punched samples from specific sections. This universal measurement approach eliminates sampling errors and provides accurate loading level reduction amount calculation across the whole electrode plate, while the automated system maintains operational simplicity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Device complexity

If manual measurements by workers are used to determine loading level reduction amount, then the equipment complexity is reduced, but the reliability of results is reduced due to variations in measurements

Engineering Contradiction:

Improvemeasurement equipment simplicityVSAvoidloading level reduction amount reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Manual measurement operations are replaced with an automated measurement system comprising measurement units and a processor. This substitution eliminates human variability and subjectivity in measurements, ensuring consistent and reliable loading level reduction amount determination, while the system design maintains reasonable complexity through modular architecture.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The measurement system performs self-measurement of the electrode plate parameters without requiring external manual intervention. The measurement units automatically capture data and the processor automatically calculates the loading level reduction amount, eliminating worker variability while maintaining a relatively simple equipment structure through automated self-operation.

Inventive Principle:

Principle #25Self-service

3Measurement precision

If the entire electrode plate is measured instead of punched samples, then the accuracy of loading level reduction amount is improved, but the measurement time and processing complexity increase

Engineering Contradiction:

Improveloading level reduction amount accuracyVSAvoidmeasurement and processing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The measurement system operates continuously to measure the entire electrode plate surface without interruption or sampling delays. Multiple measurement units work in parallel to capture data across different sections simultaneously, maintaining continuous measurement flow. This approach achieves high accuracy through complete surface coverage while minimizing measurement time through parallel processing.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

Instead of measuring the entire electrode plate at once, the system uses multiple measurement units to measure different sections in parallel. This partial measurement approach across multiple sections simultaneously achieves comprehensive coverage and high accuracy without the time penalty of sequential full-surface measurement, effectively reducing processing time while maintaining precision.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentEP4632824A1Appratus and method for manufacturing battery

Publication Date: 2025.10.15 SAMSUNG SDI CO LTD

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AI summary

An apparatus for manufacturing a battery includes: a measurement module (100) configured to measure physical properties of an electrode plate (E) in a pressing process in which the electrode plate (E) coated with a coating material (C) is pressed by a pressing roll (PR), and including a first measurement unit (110) and a second measurement unit (120); and a processor (200) configured to receive first physical properties of the electrode plate (E) before pressing and second physical properties of the electrode plate (E) after pressing from the first and second measurement units (110, 120), respectively, and to determine a change in physical properties of the coating material (C) caused by stretching of the electrode plate (E) in the pressing process, wherein the change in physical properties of the coating material (C) caused by the stretching of the electrode plate (E) functions as a factor for defining a capacity of a battery to be manufactured.