Multi-Lane Electrode Reference Marking for Accurate Roll Maps

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing electrode process for manufacturing lithium secondary batteries faces challenges in accurately identifying the electrode loss rate, leading to inaccuracies in the coordinates of electrode positions, which affects subsequent processes and quality control.

Innovation Solution

A reference point marking apparatus is introduced, comprising a first marking machine for marking reference points on uncoated portions of electrode lanes on one end of a multi-lane electrode and a second marking machine for marking reference points on remaining electrode lanes while moving in the width direction, along with a controller to coordinate their operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If multiple marking machines are used to mark reference points on all electrode lanes, then marking coverage is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improvemarking coverageVSAvoidnumber of marking machines

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The electrode is divided into multiple lanes, and the marking task is segmented between a first marking machine for one end lane and a second marking machine for remaining lanes. This segmentation allows efficient use of resources while ensuring all lanes are marked.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second marking machine is configured to move in the width direction to mark reference points on multiple electrode lanes sequentially. This dynamic capability allows one machine to perform the work of multiple static machines, reducing overall device complexity.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If manual measurement and input of electrode loss rate is performed, then operational simplicity is maintained, but measurement precision deteriorates

Engineering Contradiction:

Improveoperational simplicityVSAvoidelectrode loss rate accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

Manual measurement and input operations are replaced with an automated marking system that uses marking machines controlled by a controller. The system automatically marks reference points based on electrode position data, eliminating manual intervention and ensuring high precision in electrode loss rate measurement.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The marking system performs self-measurement and self-marking operations. The marking machines automatically determine electrode positions and mark reference points without external manual input, enabling the system to serve itself with high precision.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If electrode loss rate is not accurately identified, then process flexibility is maintained, but manufacturing precision deteriorates

Engineering Contradiction:

Improveprocess flexibilityVSAvoidelectrode position accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The marking system incorporates feedback mechanisms where the controller receives information about electrode positions and adjusts marking operations accordingly. This feedback loop ensures accurate identification of electrode loss rate while maintaining the ability to adapt to different electrode configurations.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Reference points are marked in advance at predetermined positions before subsequent processing steps. This preliminary marking action establishes accurate position references that guide later processes, ensuring manufacturing precision is maintained throughout the production chain.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250033920A1Reference point marking device and roll map generation device

Publication Date: 2025.01.30 LG ENERGY SOLUTION LTD

AI summary

Provided are reference point marking apparatuses, roll map generation apparatuses, roll maps, and marked multi-lane electrodes whereby reference points are marked on multi-lane electrodes including a plurality of electrode lanes arranged in a width direction. A first marking machine may be configured to mark reference points on an uncoated portion of an electrode lane located on at least one end of the multi-lane electrode. A second marking machine be configured to move along the width direction and mark reference points on uncoated portions of electrode lanes located between the uncoated portion of the electrode lane located at an end of the multi-lane electrode and an opposing end of the multi-lane electrode. A controller may be configured to control the first and second marking machine. A defect inspector may be configured to inspect the multi-lane electrode to obtain inspection data about defects and obtain defect coordinate data of the multi-lane electrode.