Press Roll Cleaning Cloth Wetting for Continuous Electrode Cleaning

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Solution Overview

Problem

Conventional press roll cleaning methods are inadequate during the electrode pressing process of lithium secondary batteries, as they fail to maintain effective cleaning when the press rolls are not in operation, leading to contamination and reduced electrode quality.

Innovation Solution

A cleaning apparatus with a cleaning member and a cleaning cloth that supplies cleaning liquid directly to the cloth, using multiple supply holes and units to ensure continuous and efficient cleaning, even during periods of press roll operation and non-operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a spray-type nozzle is used to supply cleaning liquid to the cleaning cloth, then the cleaning liquid can be applied during press roll operation, but the cleaning liquid evaporates or dries when press rolls are not operated, leading to inadequate cleaning

Engineering Contradiction:

Improvecleaning effectiveness during press roll operationVSAvoidcleaning effectiveness during press roll non-operation

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The cleaning liquid is supplied in advance to the cleaning cloth before the press roll cleaning operation begins. This preliminary supply ensures that the cleaning liquid is already on the cleaning cloth when the press roll starts rotating, preventing evaporation or drying during non-operation periods and ensuring continuous cleaning effectiveness.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The cleaning liquid supply is designed to maintain continuous wetness of the cleaning cloth throughout both operation and non-operation periods of the press roll. By ensuring the cleaning liquid remains on the cleaning cloth continuously, the system maintains effective cleaning action without interruption or drying out.

Inventive Principle:

Principle #20Continuity of useful action

2Productivity

If cleaning liquid is supplied during press roll operation, then cleaning can be performed continuously, but the amount and type of cleaning liquid are limited to maintain residual moisture in the electrode

Engineering Contradiction:

Improvecontinuous cleaning capabilityVSAvoidcleaning liquid amount and type flexibility

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The cleaning liquid supply is applied locally and selectively to the cleaning cloth rather than uniformly to the entire press roll or electrode area. This localized application allows for controlled amounts of cleaning liquid to be used, maintaining residual moisture requirements while enabling continuous cleaning operation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system allows for adjustment of cleaning liquid parameters such as amount, type, and supply timing based on operational conditions. By changing these parameters dynamically, the system maintains continuous cleaning capability while adhering to residual moisture constraints during electrode manufacturing.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If a single cleaning liquid supply method is used, then the system is simple, but it cannot adapt to different operational states (operation and non-operation) of the press roll

Engineering Contradiction:

Improvecleaning liquid supply system simplicityVSAvoidadaptability to different operational states

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The cleaning liquid supply system is designed to be dynamic, automatically adjusting its operation based on the press roll's operational state. During operation, liquid is supplied in a specific manner, while during non-operation, the supply pattern changes to prevent drying, thereby adapting to different states without requiring completely separate systems.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The cleaning liquid supply apparatus is designed to perform multiple functions: it supplies cleaning liquid during press roll operation for active cleaning, and maintains liquid presence during non-operation periods to prevent drying. This multi-functionality allows a single system to handle both operational states effectively.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The apparatus enhances cleaning efficiency, maintaining electrode quality by effectively removing contaminants from press rolls, thereby improving the production process and battery cell performance.

Implementation Method 1

a cleaning member which can supply a cleaning liquid to the cleaning cloth

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

cleaning liquid supply holes provided on the surface of the main body and capable of supplying the cleaning liquid

Methodology Applied

Scientific EffectFluid pressure: Pressure Gradient

Data Source

PatentEP4706840A1Apparatus for cleaning rolling roller

Publication Date: 2026.03.11 LG ENERGY SOLUTION LTD

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AI summary

An apparatus for cleaning a press roll that presses an electrode according one embodiment of the present disclosure includes a cleaning member that brings a cleaning cloth into contact with the surface of the press roll, and a cleaning cloth which cleans the press roll while passing between the press roll and the cleaning member, wherein the cleaning member can supply a cleaning liquid to the cleaning cloth.