Electrode Foil Roll Splicing for Continuous Die Coating
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Solution Overview
Problem
Existing methods for processing metal foil web material into electrode webs result in significant downtime and poor quality coatings due to inefficient attachment of supply rolls, leading to adhesive residue issues and material disposal challenges.
Innovation Solution
A method involving the use of a die coater to coat active material layers on metal foil web material, combined with the application of adhesive to the leading end of the second supply roll portion to facilitate rapid and reliable attachment to the first portion, minimizing downtime and adhesive residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional attachment methods are used to switch from a first supply roll to a second supply roll, then the switching process is simple, but significant downtime occurs and poor quality coating results downstream of the connection
Solution Approach 1:
The adhesive is applied to the leading end of the second supply roll portion before the switching operation occurs. This preliminary application of adhesive ensures that when the second supply roll is attached to the first supply roll, the connection is immediate and secure, eliminating downtime and preventing poor quality coating downstream of the connection.
2Ease of operation
If conventional attachment methods are used to switch supply rolls, then the process is straightforward, but adhesive residue gathers on deflection pulleys and tensioning rollers causing damages and requiring cumbersome cleaning
Solution Approach 1:
The adhesive is applied only to the leading end portion of the second supply roll, not to the entire surface. This localized application ensures that the adhesive remains contained at the connection point and does not spread to deflection pulleys and tensioning rollers, eliminating the harmful residue problem while maintaining ease of operation.
3Productivity
If supply rolls are switched frequently to maximize output, then production capacity increases, but downtime between processing portions increases and material of subpar quality must be disposed of
Solution Approach 1:
The adhesive is pre-applied to the leading end of the second supply roll before switching is needed. This allows for rapid attachment when switching from the first supply roll to the second supply roll, minimizing downtime between processing portions and enabling frequent roll changes to maintain maximum output capacity.
4Reliability
If adhesive is applied to attach supply rolls, then reliable attachment is achieved, but sticky adhesive residue gathers on machine components requiring cleaning and causing downtime
Solution Approach 1:
The adhesive is applied only to the leading end of the second supply roll in a controlled manner. This localized application maintains reliable attachment at the connection point while preventing adhesive from spreading to machine components, thereby eliminating cleaning requirements and associated downtime.
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 method enables faster and more reliable switching between supply rolls, reducing downtime and improving the quality of the electrode web production by minimizing adhesive residue and allowing continuous operation.
Implementation Method 1
operating a die coater to coat the metal foil web material with an active material layer on the metal foil web material
Implementation Method 2
application of adhesive to the leading end of the second supply roll portion to facilitate rapid and reliable attachment to the first portion
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A method of processing metal foil web material into an electrode web, comprising the steps of operating a die coater to coat the metal foil web material with an active material layer on the metal foil web material; supplying a first portion of metal foil web material from a first supply roll to the die coater; providing a second supply roll carrying a second portion of the metal foil web material; providing an adhesive to the leading end of the second portion of the metal foil web material; applying the leading end of the second portion of the metal foil web material to a section of the first portion of the metal foil web material such that the adhesive is sandwiched between the first and second portions of the metal foil web material; and severing the first portion of metal foil web material from the first supply roll at or behind the adhesive.