All-Solid-State Battery Cell Inspection for Inactive Area Detection
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Solution Overview
Problem
All-solid state batteries face performance degradation due to defects such as pores or foreign materials in the battery structure, which restrict lithium ion movement and degrade battery performance, necessitating a method to identify and address these issues.
Innovation Solution
A manufacturing method and apparatus that includes radiographing the cell to obtain images, pressing the cell uniformly, and processing these images to detect inactive areas, comparing them with reference values to determine suitability, and adjusting manufacturing or pressing conditions as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid electrolyte is used to replace liquid electrolyte, then battery safety is improved, but manufacturing defects such as pores and foreign materials are more likely to form
Solution Approach 1:
The patent applies preliminary action by performing radiographic inspection and image processing before final battery assembly to detect and identify defects such as pores and foreign materials in the solid electrolyte layer. This allows defects to be detected early in the manufacturing process, enabling corrective actions to be taken before the defects can significantly impact battery performance or safety.
Solution Approach 2:
The patent implements feedback through a closed-loop inspection system that uses radiographic imaging to detect defects, processes images to identify inactive areas, and provides information about defect locations and characteristics. This feedback mechanism allows manufacturers to adjust processing parameters or reject defective cells, thereby improving overall manufacturing precision and reducing the impact of defects on battery safety.
2Difficulty of detecting and measuring
If radiographic inspection and image processing are performed, then defect detection capability is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent uses an intermediary approach by introducing image processing algorithms and analysis software that automatically interpret radiographic images to identify defects. This intermediary layer between the radiographic inspection and the final defect identification reduces the complexity of manual inspection while improving detection capability. The system automatically distinguishes between different types of defects such as pores and foreign materials through image analysis.
3Manufacturing precision
If uniform pressing is applied to the cell, then manufacturing precision is improved, but detection of inactive areas becomes more challenging
Solution Approach 1:
The patent applies local quality by using image processing techniques that focus on specific local regions of the radiographic image to identify inactive areas. Rather than attempting to analyze the entire image uniformly, the system identifies and analyzes specific regions where defects are most likely to occur, such as areas with abnormal density or texture patterns. This localized approach improves detection sensitivity while managing the complexity introduced by uniform pressing.
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
This approach allows for non-destructive inspection of performance degradation factors, enabling effective evaluation and adjustment of manufacturing processes to improve battery performance.
Implementation Method 1
radiographing, by an imaging unit, the cell to obtain a first image
Data Source
AI summary
The present disclosure relates to a method of manufacturing an all-solid state battery, and more specifically, is to provide a method of manufacturing an all-solid state battery, in which performance degradation factors of all-solid-state batteries are identified through a non-destructive inspection, and the performance degradation factors are used to determine the performance of a cell and evaluate and change a manufacturing process of the cell.