Electrode Slurry Pipe Layout for Uniform Multi-Branch Coating Flow
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Solution Overview
Problem
Existing electrode slurry supply systems fail to maintain uniform flow rates across multiple branch pipes due to varying gravitational effects and viscosity changes, leading to inconsistent slurry distribution during battery manufacturing.
Innovation Solution
The electrode slurry providing device employs an oblique main pipe configuration with controlled gradients and adjusted height differences between connection points to ensure uniform flow rates across branch pipes, utilizing pumps and a tank design that maintains consistent pressure for discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrode slurry is supplied through multiple branch pipes from a single tank, then the coating process can be performed for each line, but the flow rate becomes non-uniform across different branch pipes due to varying heights
Solution Approach 1:
The patent applies the equipotentiality principle by positioning all branch pipe connection points at the same height level. This creates equal gravitational potential energy for the slurry at each branch point, ensuring that the hydrostatic pressure is uniform across all branch pipes. Consequently, the slurry flows at consistent rates to each coating line, resolving the non-uniform flow rate issue while maintaining multi-line coating capability
2Ease of manufacture
If the main pipe is positioned horizontally, then installation is simple, but the slurry level decreases causing inconsistent discharge rates
Solution Approach 1:
By positioning branch connection points at the same height, the system maintains equipotential conditions regardless of the main pipe's overall orientation. This ensures that as slurry level decreases in the tank, the vertical distance from the slurry surface to each branch point changes uniformly, maintaining consistent pressure differentials and discharge rates across all branches
3Adaptability or versatility
If branch pipes are connected at different heights, then the system can accommodate varying coating positions, but the flow rate varies due to gravitational effects
Solution Approach 1:
The patent resolves this contradiction by decoupling the connection height uniformity from the coating position flexibility. All branch pipes connect at the same height to the main pipe, ensuring uniform flow rates through equipotential conditions. The coating position flexibility is then achieved through other means such as adjustable coating heads or positioning mechanisms at the discharge ends, rather than through varying connection heights
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
The solution ensures uniform electrode slurry distribution across multiple branch pipes, independent of slurry properties, enhancing manufacturing efficiency and consistency.
Implementation Method 1
the ratio of distance to height difference is optimized between 2:1 to 3:1, ensuring uniform flow rates across all branch pipes by utilizing the pressure generated from the slurry head
Data Source
AI summary
The present specification relates to an electrode slurry providing device, a coating device, and a die coater. The electrode slurry providing device may include a tank configured to accommodate electrode slurry therein, a main pipe having one end connected to the tank at a discharge location, and two or more branch pipes configured to discharge the electrode slurry from the main pipe. Each branch pipe may be connected to the main pipe at a respective junction, each junction may be located at a horizontal distance away from the discharge location and at a vertical drop below the discharge location, and the vertical drop of each junction may become greater as the horizontal distance of the junction from the discharge location becomes greater.