Li-ion Battery Electrode Piece Adhesive Blank Foil Deformation
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Solution Overview
Problem
During the coiling process of Li-ion battery electrode pieces, the tension between the coated and uncoated areas causes deformation and folding, leading to edge distance misalignment and aesthetic issues in the battery core.
Innovation Solution
An adhesive piece is applied to the right-angle areas of the blank foil, which are located at the end of the electrode piece substrate, to prevent deformation and folding by enhancing the structural integrity and alignment during coiling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the blank foil thickness is reduced to meet design requirements, then the battery core appearance is improved, but the electrode piece becomes prone to folding during coiling
Solution Approach 1:
The blank foil is segmented into two functional zones: a thin main body portion for aesthetic appearance and a thickened right-angle area at the end for structural support. This segmentation allows different thicknesses in different regions, preventing folding while maintaining appearance quality.
Solution Approach 2:
The blank foil exhibits local quality variation where the right-angle area has increased thickness compared to the main body. This local thickening provides enhanced rigidity and folding resistance precisely where needed during coiling, without compromising the overall thin profile for appearance.
2Shape
If the blank foil thickness is reduced, then the battery core appearance is improved, but the edge distance positioning accuracy deteriorates
Solution Approach 1:
The blank foil is segmented into a thin main body for appearance and a thickened right-angle area for positioning stability. This segmentation ensures that the positioning function is fulfilled by the rigid right-angle area while the main body maintains aesthetic thinness.
Solution Approach 2:
The right-angle area has locally increased thickness that provides stable positioning during coiling, ensuring accurate edge distance control. This local quality enhancement occurs only where positioning is needed, not throughout the entire blank foil.
3Shape
If the blank foil thickness is reduced, then the battery core appearance is improved, but the tension release deformation increases
Solution Approach 1:
The blank foil structure is segmented into a thin main body portion and a thickened right-angle area. This segmentation allows the thin main body to provide aesthetic appearance while the thickened right-angle area maintains dimensional stability during tension release.
Solution Approach 2:
The blank foil exhibits local quality variation with increased thickness at the right-angle area. This local thickening provides enhanced rigidity and dimensional stability precisely where tension release occurs during coiling, preventing warping while maintaining overall thin profile.
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 adhesive piece effectively prevents the electrode piece from folding, maintaining edge distance control and improving the battery core's appearance by reducing convex and streak issues.
Implementation Method 1
the adhesive piece is adhered at the right-angle area
Data Source
AI summary
A Li-ion battery electrode piece, including an electrode piece substrate, a blank foil and an adhesive piece, the blank foil is arranged at one end of the electrode piece substrate along the length direction of the electrode piece substrate, one end of the blank foil away from the electrode piece substrate has a right-angle area, the adhesive piece is adhered at the right-angle area. The Li-ion battery electrode piece provided, through adhering an adhesive piece on the blank foil, avoids the end of the electrode piece from being deformed and folded, and improves the phenomenon of convex in battery core appearance and bad streak.