Coated Sheet Moisture Inspection Using Start and End Measurements
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Solution Overview
Problem
In manufacturing solid-state batteries, moisture in elongated coated sheets containing solid electrolytes leads to ion conductivity degradation, necessitating efficient moisture inspection methods that avoid time-consuming total inspections or inconsistent sampling.
Innovation Solution
An inspection method for elongated coated sheets involves measuring moisture amounts at specific starting and terminal end positions, comparing these values to specified thresholds, and determining acceptability based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If total inspection is performed on moisture amount in elongated coated sheet, then inspection accuracy is improved, but inspection time increases
Solution Approach 1:
The patent extracts only the critical measurement points (starting end and terminal end positions) from the entire elongated coated sheet for moisture inspection. By measuring moisture amounts only at these specific locations rather than throughout the entire sheet, the inspection method achieves sufficient accuracy to determine overall acceptability while significantly reducing inspection time compared to total inspection of the entire sheet.
Solution Approach 2:
The patent applies partial action by performing moisture measurements at selected portions (starting end and terminal end) rather than the complete elongated coated sheet. This partial inspection approach provides adequate information to judge the moisture condition of the entire sheet, achieving a balance between inspection thoroughness and efficiency.
2Loss of time
If sampling inspection is performed on moisture amount in elongated coated sheet, then inspection time is reduced, but inspection consistency deteriorates
Solution Approach 1:
The patent applies local quality by specifically targeting the starting end and terminal end positions as measurement locations. These locations are strategically selected because they represent critical areas that reflect the overall moisture condition of the elongated coated sheet. By consistently measuring at these specific local positions, the method achieves both time efficiency and inspection consistency.
Solution Approach 2:
The patent performs preliminary measurement at the starting end position before the coating process completes, and at the terminal end position after coating. This preliminary action at specific locations provides advance information about moisture conditions, enabling consistent and reliable inspection without requiring time-consuming comprehensive measurement of the entire sheet.
3Measurement precision
If moisture inspection is performed at multiple positions, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the moisture inspection task into two distinct measurement points: the starting end position and the terminal end position. By dividing the inspection into these two segments rather than attempting to measure the entire sheet continuously, the method achieves adequate measurement accuracy while keeping the inspection system relatively simple and manageable.
Data Source
AI summary
An inspection method of an elongated coated sheet including: (i) at a starting end position located at a position of a starting-end predetermined distance from a coating starting end, measuring a starting-end moisture amount and comparing the starting-end moisture amount with a starting-end specified value; (ii) at a terminal end position located at a position of a terminal-end predetermined distance from a coating terminal end, measuring a terminal-end moisture amount and comparing the terminal-end moisture amount with a terminal-end specified value; and (iii) when the starting-end moisture amount is smaller than the starting-end specified value and the terminal-end moisture amount is smaller than the terminal-end specified value, regarding the elongated coated sheet between the starting end position and the terminal end position as an acceptable product.