Unit Cell Electrode Stacking With Vision-Based Alignment Correction
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Solution Overview
Problem
Existing methods struggle to accurately check and correct deviations of electrodes from their normal positions during the manufacturing of unit cells, leading to defects in the production process.
Innovation Solution
An apparatus and method utilizing vision sensors and conveyors to directly monitor and correct electrode positions, ensuring precise alignment and reducing unnecessary movement, which includes a lower separator reel, feeding rollers, conveyors, headers, and cutters to form unit cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrodes and separator sheets move on a single line in the same direction, then the manufacturing process is simplified, but it becomes difficult to check and correct electrode position deviation
Solution Approach 1:
The patent divides the manufacturing system into separate conveyors for different materials (electrodes and separator sheets) moving in different directions. This segmentation allows independent control and positioning of each component, enabling precise detection and correction of electrode positions while maintaining process simplicity through modular design.
2Extent of automation
If the central electrode is stacked between separator sheets for position recognition, then the stacking process is automated, but the electrode tab position cannot be accurately recognized when damaged or bent
Solution Approach 1:
The patent introduces vision sensors as intermediary devices to directly observe and detect electrode positions and tab conditions. This intermediary detection system provides reliable position recognition independent of the stacking automation, allowing the system to identify damaged or bent tabs that would otherwise be hidden between separator sheets.
3Productivity
If continuous electrode input is used for mass production, then productivity increases, but continuous defects occur when electrode position deviation is not corrected
Solution Approach 1:
The patent implements a feedback mechanism where vision sensors continuously monitor electrode positions and tab conditions during high-speed production. When deviations or defects are detected, the system provides feedback to correct positioning or identify defective units, allowing continuous mass production while maintaining low defect rates through real-time monitoring and correction.
Data Source
AI summary
An apparatus for manufacturing unit cells includes reels, rollers, conveyors, headers, and a cutter. A lower separator sheet is unwound from a lower separator reel. A feeding roller moves the lower separator sheet in a first direction. A conveyor moves a first electrode in a second direction parallel to the first direction. A first header conveys that electrode from the conveyor and onto the lower separator sheet. An upper separator sheet is unwound from an upper separator reel. Another feeding roller moves, in the first direction, a first ordered stack of the lower separator sheet, first electrode, and upper separator sheet. Another conveyor moves a second electrode in the second direction. Another header conveys that electrode from the second conveyor and onto the upper separator sheet. The cutter cuts, at preset intervals, a second ordered stack of the lower separator sheet, first electrode, upper separator sheet, and second electrode.