Electrode Assembly Inspection with Adjustable Lighting Geometry

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Solution Overview

Problem

Current methods for inspecting electrode assemblies in secondary batteries, such as using X-ray generators and 3D vision equipment, are expensive and inefficient.

Innovation Solution

A 2D vision inspection apparatus utilizing optimal lighting design and a tilting device with a lighting holder and distance adjustment mechanism to inspect electrode assemblies, providing efficient and cost-effective inspection comparable to 3D vision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If X-ray generator and 3D vision equipment are used for inspection, then measurement precision is improved, but device complexity and cost increase

Engineering Contradiction:
Improveinspection accuracyVSAvoidinspection system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent uses 2D vision equipment to capture images of electrode tabs, creating a simplified optical copy of the inspection target. Instead of using complex 3D vision or X-ray equipment, the system captures 2D images that are then processed to detect defects, omissions, and shape issues. This copying approach maintains sufficient measurement precision while dramatically reducing device complexity and cost.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent replaces expensive, complex inspection equipment (X-ray generators and 3D vision systems) with cheaper 2D vision equipment. The 2D cameras and lighting systems are more affordable and simpler to implement, achieving comparable inspection effectiveness without the high cost and complexity of advanced imaging systems.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Measurement precision

If X-ray equipment is used for inspection, then measurement precision is improved, but cost increases

Engineering Contradiction:
Improveinspection accuracyVSAvoidinspection system cost
Core Design Contradiction:
Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent substitutes expensive X-ray equipment with affordable 2D vision systems. The 2D cameras, LED lighting, and image processing software provide a cost-effective alternative that achieves the same inspection objectives. This replacement dramatically reduces the manufacturing cost of the inspection system while maintaining adequate measurement precision for detecting electrode tab defects.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The system creates 2D image copies of the electrode tabs using inexpensive cameras, eliminating the need for costly X-ray imaging. These 2D images are then processed through image analysis algorithms to extract defect information, providing a low-cost pathway to achieving reliable inspection accuracy.

Inventive Principle:
Principle #26Copying

3Device complexity

If 2D vision is used instead of 3D vision, then device complexity is reduced, but measurement precision deteriorates

Engineering Contradiction:
Improveinspection system complexityVSAvoidinspection accuracy
Core Design Contradiction:
Device complexityVSMeasurement precision

Solution Approach 1:

The patent optimizes the lighting system with multiple light sources positioned at specific angles and locations to illuminate different regions of the electrode tabs. This localized lighting approach ensures that each area of interest receives appropriate illumination, enhancing the quality of 2D images for defect detection. The lighting configuration compensates for the limitations of 2D vision by creating optimal contrast and visibility for various defect types.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent employs adjustable lighting systems that can dynamically adapt illumination angles and intensities based on the inspection requirements. The lighting holder and light sources can be positioned and adjusted to optimize image quality for different inspection scenarios, allowing the 2D system to achieve measurement precision comparable to 3D systems through dynamic optimization of imaging conditions.

Inventive Principle:
Principle #15Dynamics

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 achieves efficient inspection of electrode assemblies with uniform light distribution and adjustable angles, reducing costs and improving inspection accuracy.

Implementation Method 1

a light configured to radiate light onto the electrode assembly

Methodology Applied
Scientific EffectLight radiation: Light

Implementation Method 2

The tilting portion rotates the light together with the lighting holder

Methodology Applied
Scientific EffectMechanical rotation:

Data Source

PatentEP4679065A1Apparatus for inspecting electrode assembly of secondary battery
Publication Date: 2026.01.14 SAMSUNG SDI CO LTD
  • EP4679065A1 patent drawingFigure 1
  • EP4679065A1 patent drawingFigure 2
  • EP4679065A1 patent drawingFigure 3A

AI summary

An apparatus for inspecting an electrode assembly (104) of a secondary battery includes: a table (102) configured to receive an electrode assembly that is to be inspected; a light (112) configured to radiate light onto the electrode assembly; a lighting holder (114) configured to support the light; a distance adjustment portion (116) configured to adjust a distance between the lighting holder and the electrode assembly; and a tilting portion (118) configured to adjust an angle at which the lighting holder radiates light onto the electrode assembly. The tilting portion rotates the light together with the lighting holder.