TDI Camera Inspection for Metallic Particle Detection on Battery Electrodes
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Solution Overview
Problem
Foreign metallic particles contaminating battery cells during roll-to-roll coated electrode manufacturing reduce battery performance and operation, necessitating efficient detection and removal methods.
Innovation Solution
A scanning system utilizing a TDI camera with multiple light sources emitting different wavelengths at varying angles captures images of moving electrodes, analyzing light scattering patterns to detect and classify foreign metallic particles, and triggers automated removal of contaminated sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If roll-to-roll coated electrode manufacturing is used, then energy and time efficiency is improved, but foreign metallic particle contamination increases
Solution Approach 1:
The patent implements particle detection and removal actions before battery assembly. The detection system scans electrodes on the manufacturing line to identify foreign particles, and contaminated electrodes are removed from the production stream before they can contaminate battery cells, preventing downstream contamination issues.
Solution Approach 2:
The patent introduces an intermediate detection and removal system between the roll-to-roll manufacturing process and battery assembly. This intermediary system uses optical sensors to detect particles and mechanical removal mechanisms to eliminate contaminated electrodes, serving as a buffer that protects the final battery products from contamination.
2Object-affected harmful factors
If particle detection and removal systems are implemented, then contamination is reduced, but device complexity increases
Solution Approach 1:
The patent designs a multi-functional detection system that combines particle detection, classification, and removal control in a single integrated apparatus. The system uses optical sensors to detect particles, analyzes their properties to classify them, and triggers removal mechanisms all within one device, reducing the need for separate systems and lowering overall complexity.
Solution Approach 2:
The detection system automatically identifies and triggers removal of contaminated electrodes without manual intervention. The system self-regulates by detecting particles, determining their significance, and activating removal mechanisms based on pre-set criteria, reducing the need for external monitoring and control.
3Loss of time
If automated removal is implemented, then downstream labor and time are reduced, but initial manufacturing complexity increases
Solution Approach 1:
The patent replaces manual inspection and removal processes with an automated optical detection and mechanical removal system. The system uses light-based sensors to detect particles and automated mechanisms to remove contaminated electrodes, eliminating the need for downstream manual sorting and inspection, thereby reducing downstream labor and time despite increased initial automation complexity.
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
Enhances the identification and classification of foreign metallic particles, allowing for real-time detection and prevention of particle contamination, reducing downstream labor, materials, and time by automating the removal of contaminated battery cells.
Implementation Method 1
analyzing light scattering patterns to detect and classify foreign metallic particles
Data Source
AI summary
Various embodiments associated with detecting foreign particles on battery electrodes using a TDI camera are described. In one embodiment, a method includes acquiring an image of an electrode from a time delay integration (TDI) camera. The image is captured by the TDI camera according to a first light source that emits light at a first wavelength and a second light source that emits light at a second wavelength that is different from the first wavelength. The first light source and the second light source are arranged to emit the light onto the electrode from different angles. The electrode is moving between separate rolls. The method includes analyzing the image to detect a particle that is foreign metal contaminating the electrode. The method includes providing an output identifying the particle when detected in the image.