Battery X-Ray Inspection Using Gray-Value Defect Screening
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Solution Overview
Problem
There is a need for a technology that can quickly and accurately detect battery defects, such as foreign substances, electrode folding, and mismatched electrode numbers, to ensure battery stability and durability.
Innovation Solution
An X-ray inspection device and method that irradiates X-rays onto a battery, acquires gray values based on transmitted X-rays, generates an X-ray image, and determines battery defects by comparing gray values in selected areas with reference values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray inspection is performed to detect battery defects, then measurement precision is improved, but inspection speed may be reduced due to detailed analysis requirements
Solution Approach 1:
The inspection process is divided into two distinct phases: a rapid preliminary inspection phase that quickly identifies potential defect areas, and a detailed analysis phase that focuses computational resources only on suspicious regions. This segmentation allows the system to maintain high overall inspection speed while achieving high precision where needed.
Solution Approach 2:
The system performs partial detailed analysis only on selected areas of the battery that show abnormal characteristics in the preliminary inspection, rather than conducting exhaustive detailed analysis on the entire battery. This partial action approach significantly reduces processing time while maintaining high detection accuracy for actual defects.
2Measurement precision
If comprehensive defect detection is performed on all battery areas, then measurement precision is improved, but loss of time increases due to extensive inspection coverage
Solution Approach 1:
A preliminary rapid inspection is performed first to identify areas of interest or potential defects. Based on the results of this preliminary action, the system then directs detailed analysis resources to only those specific areas that require closer examination, avoiding unnecessary detailed inspection of normal areas.
Solution Approach 2:
The inspection system applies different levels of analysis quality to different regions of the battery. High-resolution detailed analysis is applied locally to selected areas showing abnormal characteristics, while other areas receive only preliminary inspection. This local quality differentiation optimizes the balance between detection precision and inspection time.
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 solution enables rapid and accurate detection of various battery defects without damaging the battery, improving the ability to identify foreign substances, electrode misalignment, and other issues.
Implementation Method 1
an X-ray output portion irradiating X-rays to a battery including a plurality of electrode layers and a separator interposed between the plurality of electrode layers; an X-ray detection portion acquiring a plurality of gray values based on intensity of the X-rays that have transmitted through the battery among the X-rays
Data Source
AI summary
An X-ray inspection device of the present disclosure includes an X-ray output portion irradiating X-rays to a battery including a plurality of electrode layers and a separator interposed between the plurality of electrode layers; an X-ray detection portion acquiring a plurality of gray values based on intensity of the X-rays that have transmitted through the battery among the X-rays; a signal processing portion acquiring an X-ray image including the plurality of gray values; and an inspection portion determining whether the battery is defective based on a comparison result of gray values included in a selected area of the X-ray image and a reference value corresponding to the selected area.