Electrode Slurry Coating Pressure Control for Uniform Thickness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrode slurry coating apparatuses struggle to achieve uniform coating due to excessive load and pressure variations during the discharge and interruption of electrode slurry, leading to uneven coating thickness and defects in the coated products.
Innovation Solution
The proposed electrode slurry coating apparatus incorporates a pressure regulating member, comprising an electrode slurry storage tank and a static pressure opening and closing valve, which maintains a constant pressure in the electrode slurry discharge flow path by controlling the opening and closing of the valve based on pressure differences between the discharge flow path and the storage tank.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrode slurry discharge is interrupted and resumed repeatedly during coating, then coating pattern control is achieved, but excessive load causes uneven coating thickness
Solution Approach 1:
The patent applies preliminary anti-action by introducing a pressure regulating member that preemptively counteracts the excessive load generated during discharge resumption. The pressure regulator maintains stable slurry pressure before discharge occurs, preventing the surge that would otherwise cause thick coating at the front and thin coating at the rear, thus resolving the contradiction between pattern control adaptability and coating thickness uniformity.
2Device complexity
If electrode slurry discharge flow path is used without pressure regulation, then simple structure is maintained, but pressure variation causes excessive discharge
Solution Approach 1:
The patent applies parameter changes by introducing a pressure regulating member that dynamically adjusts and maintains the slurry pressure parameter within a predetermined range. This pressure regulation prevents excessive discharge while maintaining a relatively simple overall structure, resolving the contradiction between structural simplicity and discharge amount control precision.
3Productivity
If conventional coating apparatus is used, then basic coating function is achieved, but coating uniformity deteriorates during repeated discharge and interruption
Solution Approach 1:
The patent applies feedback by implementing a pressure regulating member that continuously monitors and adjusts slurry pressure to maintain it within a predetermined range during repeated discharge and interruption operations. This feedback mechanism ensures consistent coating thickness while maintaining operational continuity, resolving the contradiction between productivity and coating thickness consistency.
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 ensures consistent and uniform electrode slurry coating by maintaining a constant pressure during the discharge and interruption processes, thereby preventing excessive discharge and ensuring even coating thickness across the current collector layer.
Implementation Method 1
an opening or closing of the static pressure opening and closing valve is determined according to a difference between a pressure of the electrode slurry discharge flow path and an internal pressure of the electrode slurry storage tank
Data Source
AI summary
The present technology relates to an electrode slurry coating method and apparatus comprising a pressure adjustment member for adjusting the discharge pressure of slurry, and enables electrode slurry to be discharged under constant pressure even when a coated part and an uncoated part are repeatedly formed on a current collector layer.