Partitioned Gas Injection Nozzle for Uniform Electrode Plate Drying
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Solution Overview
Problem
In the drying process of electrode plates for secondary batteries, deviations in the flow rate and/or flow velocity of drying gas can lead to non-uniform drying, resulting in defects such as cracks and bending, especially for wide electrode plates.
Innovation Solution
A gas injection nozzle with a specific design, including a nozzle body with a partition plate that divides the flow space into two areas, allows for uniform gas flow distribution across the electrode plate, reducing deviations in flow rate and velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional gas injection nozzle is used for wide electrode plates, then the drying process can be performed, but large deviation in flow rate and flow velocity occurs between the central portion and side parts, resulting in non-uniform drying quality
Solution Approach 1:
The nozzle body is divided into an upstream portion and a downstream portion by a partition plate, creating separate first and second flow spaces. This segmentation allows independent flow control in different regions, enabling uniform gas distribution across the entire electrode plate width by preventing direct flow from the gas source to the injection holes.
Solution Approach 2:
The partition plate acts as an intermediary structure that separates the gas flow path into distinct zones. It includes communication holes that mediate gas flow between the first and second flow spaces, ensuring balanced distribution of drying gas to both side parts and the central portion of the electrode plate.
2Productivity
If drying gas is injected directly onto the electrode plate, then the drying process is efficient, but flow velocity deviation causes cracks and bending in the electrode plate
Solution Approach 1:
The nozzle design provides different flow characteristics to different regions of the electrode plate. The partition plate and communication holes create localized flow control that adjusts gas velocity and pressure distribution according to the specific needs of central versus side portions, preventing excessive flow velocity that causes damage while maintaining efficient drying.
Solution Approach 2:
The nozzle structure changes the flow parameters (velocity, pressure, distribution pattern) of the drying gas as it passes through the partitioned flow spaces. The communication holes in the partition plate regulate these parameters to ensure uniform gas delivery across the electrode plate width, eliminating the harmful velocity deviations that cause cracks and bending.
3Ease of manufacture
If the nozzle structure is simplified, then manufacturing is easier, but uniform gas flow distribution across wide electrode plates cannot be achieved
Solution Approach 1:
The partition plate divides the nozzle into manageable sections (upstream and downstream portions with separate flow spaces), making the complex flow control function achievable through a relatively simple structural modification. This segmentation approach maintains manufacturing ease while enabling precise flow distribution control across wide electrode plates.
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 achieves improved drying efficiency and quality across the entire surface of the electrode plate, reducing defects and enhancing the overall quality of the electrode plate, even for wide formats.
Implementation Method 1
a partition plate disposed between the first plate and the second plate, wherein the partition plate divides a flow space formed between the first plate and the second plate into a first flow space opposing the first plate and a second flow space opposing the second plate
Implementation Method 2
at least one communication hole formed in the partition plate and configured to allow the first flow space and the second flow space to communicate with each other
Implementation Method 3
a plurality of injection holes formed in the second plate and configured to inject drying gas from the second flow space to the outside
Implementation Method 4
drying gas such as hot air is injected onto a sheet of the current collector coated with the active material to dry the active material
Data Source
AI summary
The present disclosure provides a gas injection nozzle for drying an electrode plate including: a nozzle body including a first plate, a second plate, and a partition plate, wherein the partition plate divides a flow space formed between the first plate and the second plate into a first flow space opposing the first plate and a second flow space opposing the second plate; at least one inlet hole formed in the first plate and configured to allow drying gas to flow into the first flow space; at least one communication hole formed in the partition plate and configured to allow the first flow space and the second flow space to communicate with each other; and a plurality of injection holes formed in the second plate and configured to inject drying gas from the second flow space to the outside.