Cathode Powder Film Imaging for Real-Time Foreign Particle Analysis
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Solution Overview
Problem
Conventional methods for analyzing foreign particulate matter in cathode materials for secondary batteries are indirect, time-consuming, and limited to magnetic foreign matter, making them unsuitable for real-time production management and unable to analyze non-magnetic foreign matter.
Innovation Solution
A system that includes a transfer unit, a supply unit, a roller unit, an imaging unit, and an analysis unit, where the cathode material powder is pressed into a flat film and imaged in real-time, allowing for the direct analysis of both magnetic and non-magnetic foreign particulate matter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ICP-OES is used to analyze foreign matter in cathode material, then magnetic foreign matter can be detected, but the analysis is time-consuming and cannot be used for real-time production management
Solution Approach 1:
The patent extracts magnetic foreign matter from the cathode material powder using a magnet before analysis. This separation step allows for focused analysis of only the foreign matter containing magnetic particles, significantly reducing the time required compared to analyzing the entire powder mixture through ICP-OES.
Solution Approach 2:
The patent performs preliminary magnetic separation of foreign matter from the cathode material powder before the actual analysis. This preliminary action concentrates the target analytes (magnetic foreign matter) and removes interfering substances, enabling faster subsequent analysis that can support real-time production management.
2Measurement precision
If conventional ICP-OES method is used, then magnetic foreign matter analysis is possible, but it cannot analyze non-magnetic foreign matter
Solution Approach 1:
The patent employs a universal imaging-based analysis system that can detect both magnetic and non-magnetic foreign matter. The imaging unit captures images of all foreign particles regardless of their magnetic properties, and the analysis unit processes these images to identify different types of foreign matter, providing a multi-functional analysis capability that supersedes the magnetic-specific ICP-OES method.
Solution Approach 2:
The patent replaces the magnetic-based detection mechanism (ICP-OES) with an imaging-based detection system. This substitution allows the system to detect foreign matter through visual imaging rather than magnetic properties, enabling the analysis of both magnetic and non-magnetic foreign matter with a single unified approach.
3Quantity of substance
If a magnet is used to adsorb magnetic foreign matter, then magnetic foreign matter can be concentrated, but the analysis process becomes complex and time-consuming
Solution Approach 1:
The patent extracts magnetic foreign matter from the powder mixture using magnetic adsorption, concentrating it for easier detection. This extraction step simplifies the overall analysis by isolating the target analytes from the bulk material, reducing the complexity of subsequent analysis steps.
Solution Approach 2:
The patent uses imaging to create a visual copy or representation of the foreign matter on the magnet surface. This imaging approach replaces complex spectroscopic analysis with simpler image capture and processing, reducing device complexity while maintaining analysis effectiveness.
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 system enables rapid, real-time analysis of cathode material powders, allowing for effective management of foreign particulate matter in secondary battery production, and can analyze both magnetic and non-magnetic foreign matter, improving the stability and performance of batteries.
Implementation Method 1
a roller unit including a main roller pressing the cathode material powder supplied from the supply unit to spread the powder in the form of a flat film
Implementation Method 2
a rotary motor rotating the rotating plate and transferring the cathode material powder along the circular arc direction as the rotating plate rotates
Data Source
AI summary
Disclosed is a system for analyzing foreign particulate matter in a cathode material powder. The system includes: a transfer unit including a rotating plate having an upper surface having an edge on which a cathode material powder containing foreign particulate matter is placed and a rotary motor rotating the rotating plate and transferring the cathode material powder along the circular arc direction as the rotating plate rotates; a supply unit supplying the cathode material powder to the upper surface of the rotating plate; a roller unit including a main roller pressing the cathode material powder supplied from the supply unit; an imaging unit imaging the cathode material powder spread in the form of a flat film and transferred along the circular arc direction; and an analysis unit analyzing the image captured by the imaging unit to identify the foreign particulate matter.