Multi-Slot Die Gap Control for Uniform Multi-Column Electrode Coating
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Solution Overview
Problem
Existing multi-column coating slot dies for rechargeable battery electrodes face challenges such as defective loading levels, steps in coating width, and inability to independently control each column, leading to deviations in loading levels and coating quality.
Innovation Solution
A multi-slot die system comprising multiple dies with gap adjustment and die position adjustment assemblies, allowing independent control of gaps and positions between each die and the electrode substrate, thereby enabling precise control over the coating process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single slot die is used for multi-column coating, then the device complexity is reduced, but the manufacturing precision deteriorates due to inability to independently control each column
Solution Approach 1:
The single slot die is divided into multiple independent dies, each capable of independent gap adjustment and position control. This segmentation allows each die to be controlled separately, achieving uniform coating across multiple columns while maintaining manageable device complexity through modular design.
Solution Approach 2:
The die structure incorporates dynamic adjustment capabilities with gap adjustment assemblies and position adjustment assemblies that allow real-time modification of gap sizes and die positions. This dynamic control enables precise coating uniformity across different columns during the coating process.
2Manufacturing precision
If independent control of each column is implemented, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
Each die is equipped with independent gap adjustment assemblies and position adjustment assemblies that provide dynamic control capabilities. These assemblies include adjustable components that can be modified during operation to achieve precise loading level control for each column independently.
Solution Approach 2:
The system controls coating precision by independently adjusting parameters such as gap size and die position for each die. By changing these parameters individually for each column, the system achieves precise loading level control while managing complexity through parameter-based control rather than structural complexity.
3Device complexity
If the gap between die and electrode substrate is fixed, then the device complexity is reduced, but the manufacturing precision deteriorates due to loading level deviation
Solution Approach 1:
The gap between each die and the electrode substrate is made adjustable through gap adjustment assemblies that include movable components. This allows the gap to be dynamically modified to achieve uniform loading levels across different columns, preventing coating defects while maintaining manageable device complexity.
4Device complexity
If the die position is fixed in the width direction, then the device complexity is reduced, but the manufacturing precision deteriorates due to coating width steps
Solution Approach 1:
The die position in the width direction is made adjustable through position adjustment assemblies that allow each die to be independently positioned. This dynamic position control eliminates coating width steps by enabling precise alignment of each die, achieving uniform coating width across all columns while managing device complexity through modular adjustment mechanisms.
Data Source
AI summary
A multi-slot die includes a plurality of dies that form a continuous coating portion along a length direction on one electrode substrate that continuously proceeds in multiple columns to be spaced apart from each other along a width direction intersecting the length direction, using a supplied active material slurry, a plurality of gap adjustment assemblies that are provided corresponding to each of the dies and independently adjust gaps set between each of the dies and the electrode substrate along a discharge direction of the die and a die position adjustment assembly that is provided corresponding to the gap adjustment assemblies and independently adjusts positions of the dies with respect to the width direction.