Rod-Lamp Electrode Sheet Drying for Edge Wrinkle Prevention
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Solution Overview
Problem
Existing electrode sheet drying processes face issues with thermal wrinkles and cracks at the edge portions due to uneven heat distribution, leading to reduced drying efficiency and coating quality.
Innovation Solution
An electrode sheet drying apparatus utilizing rod-type lamps that radiate electromagnetic waves with adjustable lengths and arrangements to control energy distribution, combined with shielding units and temperature/width sensors for precise drying control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hot air is sprayed to the entire electrode sheet through a nozzle and heater, then the drying process can be performed, but the amount of heat reaching the electrode sheet cannot be controlled for each portion, causing over-drying at edge portions and resulting in thermal wrinkles or cracks
Solution Approach 1:
The drying apparatus divides the electrode sheet into multiple regions (edge portions and central portion) and applies different heating intensities to each region using multiple nozzles positioned at different locations, preventing over-drying at edges while maintaining drying efficiency
Solution Approach 2:
Different portions of the electrode sheet receive different amounts of heat based on their specific drying requirements - edge portions receive less heat to prevent over-drying, while central portions receive more heat to ensure thorough drying, thereby maintaining coating quality
2Loss of time
If the amount of heat reaching the electrode sheet 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 is segmented into multiple nozzles positioned at different locations across the electrode sheet width, allowing independent control of heat application to different regions, enabling rapid drying without causing thermal damage at edge portions
Solution Approach 2:
Each region of the electrode sheet receives heat according to its local drying needs - central portions receive higher heat flux for faster drying, while edge portions receive lower heat flux to prevent thermal wrinkles and cracks, thus reducing overall drying time without harmful effects
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
Enhances drying efficiency, prevents thermal wrinkles and cracks, and ensures high coating quality by adapting to sheet width and temperature variations, reducing construction costs and diversifying product types.
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
Data Source
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AI summary
Provided are an electrode sheet drying apparatus and an electrode manufacturing system using the same. The 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, wherein 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.