Through-Hole Electrode Collector Drying With Laser Cooling Air
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Solution Overview
Problem
Existing methods for manufacturing bipolar electrodes in power storage devices face issues with excessive temperature rise in uncoated regions of collectors, leading to potential oxidation and deterioration, which affects the sealability and charging/discharging characteristics of the devices.
Innovation Solution
A method involving the use of laser light for heating, combined with cooling air blown through through-holes in the collector, to efficiently dry the coated film while preventing excessive temperature increase in uncoated regions, and a sealing frame member design that fits with these holes to enhance sealing and prevent short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If infrared rays are irradiated onto the coated film for efficient drying, then the drying efficiency is improved, but the temperature of uncoated regions of the collector rises excessively causing oxidation and deterioration
Solution Approach 1:
The invention segments the heating function by using multiple independent heating units that can be selectively controlled. Each heating unit corresponds to a specific region, allowing the coated regions to be heated for drying while uncoated regions remain cool. This spatial segmentation of heating control resolves the contradiction between drying efficiency and preventing excessive temperature rise in uncoated areas.
Solution Approach 2:
The invention applies local quality by providing different thermal conditions to different regions of the collector. Coated regions receive infrared radiation for efficient drying, while uncoated regions are excluded from heating or receive minimal heat. This localized thermal management allows the system to optimize drying efficiency where needed while preventing oxidation and deterioration in uncoated areas.
2Loss of time
If high temperature is applied to dry the coated film quickly, then the drying time is reduced, but the adhesion of uncoated regions and sealing portions deteriorates due to oxidation
Solution Approach 1:
The heating units are segmented and selectively activated only in regions where coated films are present. This allows rapid drying of coated areas through localized high-temperature infrared heating while keeping uncoated regions at lower temperatures, thereby preserving their adhesion properties and preventing oxidation-related deterioration.
Solution Approach 2:
The invention converts the potential harmful effect of infrared radiation (which would cause excessive heating and oxidation) into a beneficial localized drying process. By using infrared rays only where coated films are present, the system achieves rapid drying without the harmful side effects of widespread high-temperature exposure, thus converting a potential harm into a controlled benefit.
3Speed
If infrared rays are used for heating the coated film, then the drying speed is increased, but the conductivity of uncoated regions becomes poor due to oxidation
Solution Approach 1:
The infrared heating system is segmented into multiple controllable units that are activated only in regions with coated films. This selective heating achieves high drying speed in coated areas while preventing oxidation in uncoated regions, thereby maintaining their electrical conductivity and overall system reliability.
Solution Approach 2:
The system applies local quality by creating different thermal environments in different regions. Coated regions experience high-temperature infrared heating for rapid drying, while uncoated regions are kept at lower temperatures to preserve their conductivity. This localized thermal management resolves the contradiction between drying speed and conductivity maintenance.
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 approach allows for efficient drying of the coated film without excessive temperature rise, maintaining the integrity of uncoated regions, improving sealability and charging/discharging performance of the power storage device.
Implementation Method 1
irradiation of light for heating onto the coating of the collector with a coating
Implementation Method 2
drying the coating to form a positive electrode layer or a negative electrode layer
Implementation Method 3
blowing cooling air onto the through-holes
Implementation Method 4
irradiation of light for heating onto the coating
Data Source
AI summary
A method of manufacturing a collector with an electrode of the present disclosure has a step of fabricating a collector with a coating, and a step of fabricating a collector with an electrode. In fabricating the collector with a coating, a composite material slurry is coated on a collector that is a sheet-shaped collector having plural through-holes or is a web-shaped collector having plural through-holes, and a collector with a coating, which has at least one coating of the composite material slurry, is fabricated. In fabricating the collector with an electrode, cooling air is blown onto the through-holes simultaneously with irradiating of light for heating onto the coating of the collector with a coating, and drying the coating to form a positive electrode layer or a negative electrode layer is formed, and the collector with an electrode is fabricated.