Laminating Roller End Heating for Electrode Assembly Bonding
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Solution Overview
Problem
The adhesive strength of the electrode assembly's ends in the full-width direction is compromised due to insufficient pressurizing and heating, leading to a lower bonding quality compared to the central portion.
Innovation Solution
An electrode assembly laminating roller with a central portion and end portions where the surface temperature of the end portions is higher than the central portion, utilizing materials with varying thermal conductivity and heating members to achieve this temperature differential, ensuring proper adhesion across the full-width direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the electrode assembly has thinner ends in the full-width direction, then the structure is more compact, but the pressurizing and heating are insufficient at the ends leading to lower adhesive strength
Solution Approach 1:
The laminating roller provides localized heating with higher temperature at the end portions where the electrode assembly is thinner. This non-uniform heating pattern matches the non-uniform thickness distribution, ensuring that each region receives appropriate heat for optimal adhesion.
Solution Approach 2:
The patent anticipates the potential adhesion problem at the thinner end portions by pre-compensating with higher heating intensity at these locations before the lamination process begins, thereby preventing adhesive strength issues rather than correcting them afterward.
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 solution significantly improves the adhesive strength of the electrode assembly's ends by maintaining a temperature difference that enhances bonding, achieving 85-95% of the central portion's adhesive strength, thereby addressing the issue of reduced bonding quality at the ends.
Implementation Method 1
the laminating roller comprises a heating member therein, and the surface temperature of the end portion is expressed higher than the surface temperature of the central portion
Data Source
AI summary
The present invention relates to an electrode assembly laminating roller for laminating an electrode and a separator, wherein the laminating roller comprises a central portion; and end portions positioned at both ends of the central portion with respect to the longitudinal direction, and wherein the surface temperature of the end portion is expressed higher than the surface temperature of the central portion.