Electrode Slurry Coating Shim Geometry for Uniform Edge Coating
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Solution Overview
Problem
Existing electrode slurry coating processes suffer from defects such as edge thickness variation and edge extraction issues, leading to reduced production yields and facility utilization rates.
Innovation Solution
A coating shim and electrode slurry coating die design featuring a frame with inclined guide portions that create a discharge port, allowing the electrode slurry to flow through a hollow region, with the distance between lower portions of the guide portions greater than the distance between upper portions, enhancing coating quality and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional coating die is used to apply electrode slurry, then the coating process can be completed, but defects such as side ring phenomenon and edge thickness variation occur due to physical properties of the slurry
Solution Approach 1:
The guide portions are designed with different distances between upper and lower portions, creating non-uniform gap widths that correspond to different regions of the electrode. The lower portion has a greater distance than the upper portion, allowing localized adjustment of slurry flow characteristics to prevent edge extraction and side ring phenomena while maintaining overall coating uniformity.
Solution Approach 2:
The invention changes the geometric parameters of the guide portions, specifically the distance between upper and lower portions varies along the length of the guide portions. This parameter variation adjusts the slurry flow rate and pressure distribution locally, transforming the harmful physical properties of the slurry into beneficial coating characteristics.
2Productivity
If electrode slurry is applied using existing methods, then production can continue, but defects lead to reduced production yields and facility utilization rates
Solution Approach 1:
The guide portions are pre-configured with specific geometric dimensions before the coating process begins. The varying distances between upper and lower portions are designed in advance to compensate for expected slurry behavior during coating, preventing defects before they occur and ensuring high production yields without requiring post-processing corrections.
Data Source
AI summary
A coating shim for electrode slurry discharge includes a hollow region through which an electrode slurry may flow and a frame surrounding at least a part of the hollow region. The frame includes a base portion extending in one direction to form one side surface of the hollow region; side portions extending at opposite ends of the base portion in a direction different from the one direction; and guide portions extending at respective ends of the side portions to face each other and to be spaced apart from each other to form a discharge port therebetween which allows the hollow region to communicate with outside. The guide portions have inclined surfaces at respective ends thereof such that a distance between lower portions of the guide portions is greater than a distance between upper portions of the guide portions.