Electrode Sheet Drying Layout for Edge Wrinkle Prevention
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Solution Overview
Problem
Existing electrode sheet drying processes lead to thermal wrinkles or cracks at the edge portions due to uneven heat distribution, resulting in reduced drying efficiency and coating quality.
Innovation Solution
An electrode sheet drying apparatus utilizing rod-type lamps that radiate electromagnetic waves with controlled energy absorption, combined with a shielding unit to prevent over-drying of edge portions, and a controller to adaptively manage lamp operations based on sheet width and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hot air is sprayed to the entire electrode sheet through a nozzle and heater, then the drying process can be simplified, but the amount of heat reaching each portion of the electrode sheet cannot be controlled, causing over-drying of edge portions and thermal wrinkles or cracks
Solution Approach 1:
The drying system is segmented into multiple independent heating zones with separate nozzles and heaters positioned at different locations across the electrode sheet width. Each zone can independently control heat application to its specific region, enabling precise thermal management of edge portions versus central portions while maintaining overall process simplicity
Solution Approach 2:
Different heating parameters are applied to different regions of the electrode sheet. Edge portions receive controlled, reduced heat input compared to central portions through independently adjustable nozzles and heaters, creating localized quality variations in heat treatment that prevent over-drying while ensuring adequate drying of heavily coated central areas
2Productivity
If the amount of heat is increased to improve drying efficiency, then drying time is reduced, but edge portions become over-dried causing thermal wrinkles or cracks
Solution Approach 1:
The heating system incorporates dynamically adjustable parameters for each heating zone, allowing the amount of hot air supplied and heater temperature to be independently controlled and optimized in real-time based on the specific drying requirements of different electrode sheet regions, enabling high drying efficiency without compromising coating integrity
Solution Approach 2:
The system implements feedback control mechanisms where the drying state of different electrode sheet portions is monitored and used to adjust the heat input parameters of corresponding heating zones, ensuring that edge portions are prevented from over-drying while maintaining overall high drying efficiency through continuous optimization
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
Improves drying efficiency and coating quality by preventing thermal wrinkles and cracks, allowing for flexible production with varying sheet widths and coating materials while reducing construction costs.
Implementation Method 1
a plurality of rod-type lamps arranged parallel to each other along the transfer path and configured to radiate electromagnetic waves of a certain wavelength band to the electrode sheet transferred through the transfer path
Implementation Method 2
a shielding unit configured to shield electromagnetic waves radiated from the second rod-type lamp from traveling to both edge portions of the electrode sheet
Implementation Method 3
heating units arranged at certain intervals along the transfer path and configured to send hot air to the electrode sheet transferred through the transfer path
Data Source
AI summary
An electrode sheet drying apparatus includes a drying structure including a transfer path through which an electrode sheet is transferred, and a plurality of rod-type lamps arranged parallel to each other along the transfer path and configured to radiate electromagnetic waves of a certain wavelength band to the electrode sheet transferred through the transfer path. The plurality of rod-type lamps include a first rod-type lamp having a length sufficient to cover both edge portions of the electrode sheet in a width direction and a central portion between the both edge portions, and a second rod-type lamp having a length less than the length of the first rod-type lamp and sufficient to cover only the central portion of the electrode sheet. An electrode manufacturing system using the same is also provided.