Multi-Angle Battery X-Ray Testing for Corner Defect Accuracy
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Solution Overview
Problem
Existing battery testing methods suffer from misjudgment, omissions, and incomplete testing due to distorted images of battery corners, particularly for stacked batteries, which are not accurately captured when rays are not perpendicular to the surface.
Innovation Solution
A battery testing apparatus with multiple ray sources and detectors positioned to ensure rays are nearly perpendicular to battery corners, using small focal sizes to minimize distortion, and a comprehensive testing unit to analyze images from these angles, enhancing the accuracy of defect detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single ray source and detector are used for battery testing, then the device complexity is low, but the measurement precision and completeness of defect detection at battery corners deteriorate due to image distortion
Solution Approach 1:
The testing apparatus is segmented into multiple independent ray source-detector pairs, with each pair dedicated to detecting specific corners of the battery. This segmentation allows each detector to capture undistorted images of its assigned corner region, solving the measurement precision problem while keeping each individual detection unit relatively simple.
Solution Approach 2:
The patent transitions from a single detection viewpoint to multiple spatial viewpoints by positioning ray sources and detectors at different locations around the battery. This dimensional expansion enables simultaneous detection of multiple corners from optimal angles, improving comprehensive defect detection capability.
2Measurement precision
If the ray source focus size is large, then the device is easier to manufacture, but the imaging resolution and detection precision deteriorate
Solution Approach 1:
The patent changes the focal size parameter of the ray sources to ≤10 μm, which is a significant reduction from conventional sizes. This parameter change directly improves imaging resolution and detection precision, enabling clear visualization of fine defect details at battery corners despite the increased manufacturing difficulty.
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 apparatus reduces image distortions and improves the completeness of defect testing, ensuring more accurate assessment of battery quality by minimizing misjudgment and omissions.
Implementation Method 1
a first ray source; a second ray source; a first detector, opposite to an exit port of the first ray source; a second detector, opposite to an exit port of the second ray source
Data Source
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AI summary
The present application provides a testing apparatus and method for testing a battery, a device, and a medium, and belongs to the technical field of batteries. The testing apparatus includes a first ray source, a first detector, a second ray source, a second detector, a bearing platform, and a testing unit. The bearing platform is configured to place a battery to be tested, and the bearing platform is movable. A movement trajectory of the bearing platform passes between the first ray source and the first detector, and the movement trajectory of the bearing platform passes between the second ray source and the second detector. The testing unit is respectively connected to the first detector and the second detector. The testing unit is configured to perform defect testing on the battery to be tested based on a ray received by the first detector and a ray received by the second detector.