Coating Die Flow Distribution for Uniform Electrode Slurry Output
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Solution Overview
Problem
The uneven distribution of slurry through coating outlets in the coating process for electrode plates results in inconsistent coating weights, affecting the quality and consistency of battery performance.
Innovation Solution
A coating die with equal cross-sectional areas of inlet ports in distribution channels, guided by distribution cavities and outlets, ensuring even slurry distribution and stable output to multiple outlets, enhanced by sub-distribution channels and adjustable outlet sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple coating outlets are used to increase coating efficiency, then productivity is improved, but slurry distribution becomes uneven causing inconsistent coating weights
Solution Approach 1:
The distribution channel is divided into multiple sub-distribution channels, with each sub-channel corresponding to a specific coating outlet. This segmentation ensures that slurry flows through dedicated pathways, preventing mixing and ensuring uniform distribution to each outlet, thereby maintaining coating weight consistency while achieving high productivity through multiple outlets
Solution Approach 2:
Each sub-distribution channel is designed with specific local characteristics including equal cross-sectional areas at inlet ports and tailored flow paths. This local optimization ensures that each coating outlet receives slurry with consistent flow rate and pressure, achieving uniform coating weights across all outlets simultaneously
2Device complexity
If distribution channels allow free flow to multiple outlets, then device complexity is reduced, but slurry amounts at each outlet become uneven
Solution Approach 1:
The distribution channel is segmented into multiple independent sub-distribution channels, each with its own inlet port and outlet port. This segmentation maintains relatively simple device structure while ensuring that slurry flow to each outlet is controlled through dedicated pathways, achieving uniform slurry amounts at each outlet without complex control mechanisms
3Manufacturing precision
If distribution channels are designed with equal inlet port cross-sectional areas, then slurry distribution uniformity is improved, but device complexity increases due to multiple components
Solution Approach 1:
Multiple sub-distribution channels are merged within a single distribution channel structure, sharing common inlet and outlet ports. This merging approach achieves uniform slurry distribution through the equal cross-sectional area design while minimizing device complexity by reducing the number of separate components and simplifying the overall structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the uniformity and consistency of slurry coating by evenly distributing slurry across multiple outlets, stabilizing pressure, and allowing for flexible weight adjustments, thereby enhancing electrode plate quality.
Implementation Method 1
cross-sectional areas of all the inlet ports of the plurality of distribution channels are equal... the slurry can be evenly distributed and guided to the plurality of coating outlets under the action of the distribution channels
Implementation Method 2
the first distribution plate extending through the feed cavity and the first chamber, resulting in a longer path for the first distribution plate to act on the slurry, providing a stronger guiding effect
Implementation Method 3
The first distribution cavity is not only capable of communicating with the plurality of coating outlets but also capable of temporarily storing the slurry, which facilitates stabilizing the pressure of the slurry, making the slurry output more uniform and stable
Data Source
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AI summary
The present application provides a coating die and an electrode plate coating device, where the coating die is provided with an inlet, a first distribution cavity, a plurality of distribution channels, and a plurality of coating outlets. The plurality of coating outlets are spaced apart along a first direction. Each distribution channel is provided with an inlet port and an outlet port at two respective ends thereof. The inlet port is in communication with the inlet, each outlet port is oriented toward a corresponding coating outlet, and cross-sectional areas of the inlet ports of all of the plurality of distribution channels are equal. Since the cross-sectional areas of all the inlet ports of the distribution channels are equal and the outlet port of each distribution channel corresponds to a respective coating outlet, the slurry can be evenly distributed and guided to the plurality of coating outlets under the action of the distribution channels, reducing the problem of uneven slurry amounts obtained by the coating outlets during free flow, which facilitates improving the consistency of discharge from the plurality of coating outlets and enhances the uniformity of slurry coating in the coating process.