X-ray Inspection Filter for Battery Coated Uncoated Regions
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Solution Overview
Problem
Conventional X-ray inspection apparatuses incorrectly detect foreign objects in coated and uncoated portions of lithium ion battery samples due to excessive contrast differences, leading to false positives and underdetection in uncoated areas, requiring separate voltage adjustments for accurate inspection.
Innovation Solution
An X-ray inspection apparatus with a filter that reduces the intensity ratio between X-rays passing through regions of high and low absorption, allowing simultaneous inspection of foreign objects in both coated and uncoated areas under the same conditions, using a material that absorbs specific energy bands more than others to minimize contrast differences and prevent halation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single inspection condition is used for both coated and uncoated portions, then inspection process simplicity is improved, but contrast difference becomes excessively large causing boundary over-detection
Solution Approach 1:
The patent segments the inspection process into distinct stages for coated and uncoated portions. By dividing the inspection into separate voltage conditions (30kV for coated, 50kV for uncoated) and processing regions independently, the system eliminates boundary over-detection issues while maintaining operational simplicity through automated region-based condition switching
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
Enables accurate and simultaneous detection of foreign objects in both coated and uncoated portions of lithium ion battery samples, reducing false positives and underdetection, while maintaining high detection accuracy and reducing equipment costs by correcting sample bending and sagging.
Implementation Method 1
a filter (4) installed between the X-ray source (2) and the X-ray detection unit (3)... the filter is formed of a material that makes an intensity ratio between an X-ray that passed through the region with a small amount of X-ray absorption and an X-ray that passed through the region with a large amount of X-ray absorption smaller
Data Source
AI summary
Proposed are an X-ray inspection apparatus and a method of inspection with X-rays in which even in a sample having coated portion and uncoated portion of the cathode material, the inspection of foreign objects in the both portions can be simultaneously performed under the same conditions. The X-ray inspection apparatus includes an X-ray source (2) that irradiates the sample (S) with X-rays (X1), an X-ray detection unit (3) which is installed at a side opposite to the X-ray source with respect to the sample and detects the X-rays that passed through the sample, and a filter (4) installed between the X-ray source and the X-ray detection unit, wherein the sample has a region with a large amount of X-ray absorption and a region with a small amount of X-ray absorption.