Separator Winding Core Color Optimization for Stain Detection
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Solution Overview
Problem
The recycling of nonaqueous electrolyte secondary battery separator winding cores is inefficient due to the difficulty in quickly identifying and removing stains like black electrically-conductive substances and white substances, which can lead to defective batteries if not properly cleaned.
Innovation Solution
The separator winding core is configured with a Munsell color system lightness of not less than 3.0 but not more than 9.2 and a chroma of not less than 0.5, allowing stains to be visually distinguished easily, thereby reducing the time required for recycling and cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the separator winding core uses a conventional color, then the manufacturing cost is reduced, but the time required to identify stains during recycling increases
Solution Approach 1:
The separator winding core is designed with a specific color configuration described by the Munsell color system: lightness (value) of not less than 3.0 but not more than 9.2, and chroma of not less than 0.5. This color optimization enables immediate visual detection of stains such as black electrically-conductive substances and white substances, thereby reducing the time required for quality checking during recycling operations.
2Difficulty of detecting and measuring
If the separator winding core has a dark color, then stains are easier to detect, but the chroma may be insufficient for immediate identification
Solution Approach 1:
The invention specifies precise color parameters using the Munsell color system: lightness (value) between 3.0 and 9.2, and chroma of not less than 0.5. These parameter ranges are optimized to provide sufficient contrast for detecting both black electrically-conductive substances and white substances, ensuring immediate identification while maintaining manufacturability.
Data Source
AI summary
The invention provides for a reduction in the period of time necessary for recycling a separator winding core around which a nonaqueous electrolyte secondary battery separator is wound. The separator winding core is described by the Munsell color system as (i) a lightness of not less than 3.0 but not more than 9.2 and (ii) a chroma of not less than 0.5.