Electrode Slurry Flow Paths for Precise Coating Control
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Solution Overview
Problem
Existing electrode slurry control devices face challenges in precisely controlling the supply and stoppage of electrode slurry, leading to issues with shear stress and uniformity, particularly during continuous and intermittent coating processes, which can affect the quality of battery electrodes.
Innovation Solution
The electrode slurry control device incorporates a main body with a receiving port, a coater, supply tube, first and second circulation tubes, and opening/closing members with specific diameter and conical shapes to manage the flow and circulation of electrode slurry, minimizing shear stress and ensuring uniform application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional slurry control device is used, then the structure is simple, but the control precision of slurry supply and stoppage is insufficient
Solution Approach 1:
The device is divided into multiple independent circulation paths (first circulation path with first circulation tube, second circulation path with second circulation tube) and multiple opening/closing members (first, second, third opening/closing members), each controlling specific flow paths. This segmentation allows precise control of slurry supply to different regions and enables complex coating patterns while maintaining manageable structural complexity through modular design
Solution Approach 2:
The main body serves multiple functions: it receives slurry from external storage, distributes it through multiple circulation paths, and enables both continuous and intermittent supply modes. The opening/closing members provide universal control capability across different circulation paths, allowing the same control mechanism to manage multiple flow paths and achieve various coating patterns
2Manufacturing precision
If the connection tubes have uniform diameter, then the manufacturing is simple, but the shear stress distribution is uneven
Solution Approach 1:
Different connection tubes are designed with different average diameters tailored to their specific functions: the first connection tube has a smaller average diameter optimized for supply flow control, while the second connection tube has a larger average diameter optimized for circulation flow. This local optimization of tube dimensions ensures uniform shear stress distribution and consistent slurry flow characteristics in each path, improving coating uniformity
Solution Approach 2:
The patent specifies precise diameter parameters for different connection tubes (first connection tube with smaller average diameter, second connection tube with larger average diameter) to control flow characteristics. These parameter changes optimize the shear stress distribution and flow uniformity in each circulation path, ensuring consistent slurry application while maintaining manufacturability through well-defined geometric parameters
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
This solution reduces shear stress and allows for precise control of electrode slurry application, enhancing the uniformity and quality of the coating process, thereby improving the performance and reliability of battery electrodes.
Implementation Method 1
an average diameter of an inner peripheral surface of the second connection tube is smaller than an average diameter of an inner peripheral surface of the first circulation tube, and in which an average diameter of an inner peripheral surface of the third connection tube is larger than an average diameter of an inner peripheral surface of the second connection tube
Data Source
AI summary
An electrode slurry control device may include a main body configured to receive electrode slurry from an outside storage, a coater configured to discharge electrode slurry, a supply tube configured to supply the electrode slurry to the coater and connected to the main body through a first connection tube having a first opening/closing member, a first circulation tube connected to the main body through a second connection tube having a second opening/closing member; and a second circulation tube connected to the main body through a third connection tube having a third opening/closing member, a diameter of an inner peripheral surface of the second connection tube is smaller than an average diameter of an inner peripheral surface of the first circulation tube, and a diameter of an inner peripheral surface of the third connection tube is larger than an average diameter of an inner peripheral surface of the second connection tube.