Electrode Tab Folding Inspection With Regional Width Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods fail to accurately inspect electrode tab folding in secondary batteries, leading to incorrect classification of non-defective products as defective due to minor tab folding that does not affect welding quality, thereby reducing productivity.
Innovation Solution
A method and system for inspecting electrode tab folding by dividing the tab region into multiple sections and evaluating the width of each, determining if it meets predetermined width criteria, and reclassifying plates as non-defective if folding has no impact on welding quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing inspection methods are used to detect electrode tab folding, then all tabs with any folding are classified as defective, but this leads to incorrect rejection of non-defective products with minor folding that does not affect welding quality
Solution Approach 1:
The electrode tab is divided into multiple regions (first region, second region, third region) along its length. Each region is independently inspected for folding defects. This segmentation allows the inspection system to distinguish between minor folding in non-critical regions (which may not affect welding) and significant folding in critical regions (which does affect welding), thereby reducing false rejections while maintaining inspection reliability.
2Manufacturing precision
If strict width criteria are applied to the entire electrode tab, then minor folding is detected as defective, but this reduces productivity by rejecting acceptable products
Solution Approach 1:
Different width criteria are applied to different regions of the electrode tab. The first region (connected to the electrode plate) has a first width criterion, the second region (middle section) has a second width criterion, and the third region (end section) has a third width criterion. This local quality approach allows minor variations in non-critical regions to be tolerated while maintaining strict control over critical regions, thereby improving manufacturing efficiency without sacrificing essential quality.
3Device complexity
If the electrode tab region is inspected as a single unit, then folding detection is simple, but it cannot distinguish between folding that affects welding quality and folding that does not
Solution Approach 1:
The electrode tab region is divided into multiple discrete regions (first, second, and third regions) with different width criteria. This segmentation enables the inspection system to evaluate folding defects in the context of their location and potential impact on welding quality, thereby improving measurement precision while maintaining reasonable inspection process complexity through automated region identification and criterion application.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A method of inspecting electrode tab folding performed by at least one processor includes obtaining an image that has captured an electrode plate on which an electrode tab is formed, wherein the image comprises an electrode plate region and an electrode tab region, dividing the electrode tab region(304, 504) in the image into a plurality of regions(510, 520, 530), and performing an electrode tab folding inspection based on a width of the electrode tab region(304, 504) in each of the plurality of regions(510, 520, 530).