Electrode Alignment via Reference Position Detection
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Solution Overview
Problem
Existing methods for producing secondary battery electrode stacking units face challenges in accurately aligning electrodes, leading to variations in their relative positions due to the difficulty in maintaining alignment during the stacking process.
Innovation Solution
A method where the position of one electrode is used as a reference to adjust the joining position of the second electrode, utilizing detection cameras to ensure accurate alignment and minimize positional variations between electrodes during the stacking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrodes are stacked on separators with positions remaining unchanged at a setting reference position without being aligned, then the stacking process is simple, but variation in relative position between electrodes occurs
Solution Approach 1:
The patent applies preliminary action by detecting the position of the first electrode before the second electrode is joined to the separator. This advance detection allows the system to prepare the reference position for the second electrode based on the actual position of the first electrode, thereby preventing position variation before it occurs during the stacking process.
Solution Approach 2:
The patent implements feedback by using the detected position of the first electrode as a reference to determine the joining position of the second electrode. The system continuously monitors the position of stacked electrodes and adjusts subsequent joining positions accordingly, creating a closed-loop control system that maintains consistent relative positioning between electrodes throughout the stacking process.
2Manufacturing precision
If the joining position of the second electrode is corrected using the detected position of the first electrode as reference, then alignment accuracy is improved, but the joining process becomes more complex
Solution Approach 1:
The patent replaces complex mechanical alignment systems with an optical detection and control system. Instead of using mechanical guides or fixtures to maintain electrode positions, the system uses detection cameras to monitor electrode positions and a control device to calculate and adjust joining positions, thereby reducing mechanical complexity while improving alignment accuracy.
Solution Approach 2:
The patent introduces an intermediary control device that acts as a mediator between the detection system and the joining process. This control device receives position information from the detection camera, calculates the appropriate joining position for the second electrode, and transmits control signals to the joining device, thereby simplifying the overall system architecture while achieving precise alignment.
Data Source
AI summary
In producing a mono-cell, the mono-cell is formed from separator, positive electrode, separator and negative electrode which are joined to each other. Negative electrode is joined, one by one, to one surface of strip of continuously conveyed separator. Positive electrode having different size from negative electrode is joined, one by one, to the other surface of separator. Strip of continuously conveyed second separator is joined to one of negative and positive electrodes. Position of negative electrode joined to separator is detected by negative electrode joining position detection cameras, and joining position of positive electrode is corrected by positive electrode alignment mechanism with this detected position of negative electrode being a reference during conveyance of positive electrode along positive electrode conveyance direction.