Crack Rate Analysis Method for Lithium Battery Electrode Active Materials
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Solution Overview
Problem
Current methods lack a quantitative analysis for comparing the degree of cracking in electrode active materials of lithium secondary batteries, which affects their performance and degeneration rate, relying solely on visual comparisons.
Innovation Solution
An analysis method involving the formation of an electrode with an active material, binder, and conductive material, followed by visualization with resin impregnation, cross-sectioning, and image processing to calculate the crack rate using specific image processing steps and equations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If visual comparison method is used to analyze crack degree, then the analysis process is simple, but the measurement precision is insufficient
Solution Approach 1:
The patent replaces the manual visual comparison method with an automated image processing system that uses software algorithms to objectively quantify crack boundaries and calculate crack rates, thereby improving measurement precision while maintaining reasonable process complexity
Solution Approach 2:
The patent introduces cross-sectional images as an intermediary medium between the electrode sample and the analysis result. These images capture the crack structures and enable quantitative analysis through image processing, bridging the gap between physical samples and measurable data
2Measurement precision
If quantitative analysis method is implemented, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The patent segments the image processing task into distinct sequential steps: primary image processing to obtain initial crack boundaries, secondary image processing to refine boundary extraction, and crack rate calculation. This segmentation makes the complex quantitative analysis more manageable and systematic
Solution Approach 2:
The patent performs preliminary actions by preparing cross-sectional images and conducting primary image processing before the actual crack rate calculation. These preparatory steps organize the data and reduce complexity for the subsequent quantitative analysis
Data Source
AI summary
Provided is an analysis method for a crack rate of an electrode active material of an electrode, comprising the steps of: forming an electrode including an electrode active material, a binder, and a conductive material; impregnating the electrode with a resin and visualizing material regions including the electrode active material, the binder, and the conductive material which are included in the electrode, and a pore region; cutting the electrode and forming an electrode cross-section sample; photographing a cross section of the electrode cross-section sample using a scanning electron microscope and obtaining a cross-sectional image; performing primary image processing on the cross-sectional image and extracting total surface area pixels of the electrode active material; performing secondary image processing on the cross-sectional image and extracting total boundary pixels of the electrode active material; and calculating a crack rate of the electrode active material of the electrode in the cross-sectional image.