Electrode Slurry Pressure Control for Uniform Intermittent Coating
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Solution Overview
Problem
Conventional electrode slurry coating apparatuses struggle with uneven coating due to excessive discharge of electrode slurry when the discharge is resumed after interruption, leading to inconsistent thickness on the current collector layer.
Innovation Solution
An electrode slurry coating apparatus and method incorporating a pressure regulating member, comprising an electrode slurry discharge flow path, a storage tank, and a static pressure opening and closing valve that controls pressure differences between the discharge flow path and storage tank to maintain consistent slurry discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the electrode slurry discharge is interrupted and then resumed to create coated and non-coated parts on the current collector, then the coating pattern can be formed, but excessive load is taken into the discharge flow path causing uneven coating thickness
Solution Approach 1:
The pressure regulating member maintains a predetermined pressure in the discharge flow path before discharge resumption occurs. This preliminary pressure maintenance prevents the excessive load that would otherwise occur when discharge is resumed after interruption, thereby preventing excessive slurry discharge and ensuring uniform coating thickness throughout the coated parts.
2Shape
If the electrode slurry discharge is repeatedly interrupted and resumed, then the coated and non-coated parts are formed, but the coating thickness becomes inconsistent at the front and rear of coated parts
Solution Approach 1:
The pressure regulating member proactively maintains predetermined pressure in the discharge flow path before each discharge resumption event. This prevents the pressure fluctuations that cause inconsistent coating thickness at different positions (front and rear) of coated parts, ensuring uniform thickness throughout while maintaining the required coated and non-coated part structure.
3Ease of operation
If conventional electrode slurry discharge apparatus is used without pressure regulation, then the discharge can be interrupted and resumed easily, but excessive electrode slurry is discharged leading to non-uniform coating
Solution Approach 1:
The pressure regulating member acts as an intermediary component between the slurry supply system and the discharge flow path. It mediates the pressure transitions during discharge interruption and resumption, maintaining a predetermined pressure in the discharge flow path to prevent excessive slurry discharge while allowing easy interruption and resumption of discharge operations.
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 apparatus ensures uniform electrode slurry coating by maintaining constant pressure during discharge and interruption phases, preventing excessive discharge and ensuring consistent thickness on 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.