Crown Roll Tape Feeding for Wrinkle-Free Electrode Lamination
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Solution Overview
Problem
The adhesion of lamination tape used in the manufacturing of rechargeable battery electrodes is higher than general tape, leading to intensified flow and formation of wrinkles during feeding, affecting the supply path, supply angle, and adhesive direction.
Innovation Solution
A lamination tape feeding system with an input roll, guide rolls, discharge roll, and crown rolls that guide the tape downward and then upward, featuring peaks and troughs or protruding parts to minimize width-direction flow, and a resin coating layer to reduce friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adhesion of lamination tape is increased to ensure proper attachment to the electrode plate, then the attachment reliability is improved, but the width-direction flow and wrinkling during feeding are intensified
Solution Approach 1:
The invention introduces a crown roll with a curved surface (maximum height at center, decreasing toward ends) to replace traditional flat guide rolls. This curvature creates a mechanical constraint that suppresses the width-direction flow of the high-adhesion lamination tape during feeding, preventing wrinkles while maintaining the tape's adhesive properties for reliable attachment
2Reliability
If the adhesion of lamination tape is increased to ensure proper attachment to the electrode plate, then the attachment reliability is improved, but the supply path and supply angle are affected
Solution Approach 1:
The crown roll's curved surface is strategically positioned in the supply path to guide the lamination tape through a controlled trajectory. The curvature constrains the tape's movement, stabilizing the supply path and supply angle even though the tape maintains high adhesion for reliable attachment
3Reliability
If the adhesion of lamination tape is increased to ensure proper attachment to the electrode plate, then the attachment reliability is improved, but the adhesive direction is affected
Solution Approach 1:
The crown roll's curved surface acts as a mechanical guide that maintains the correct adhesive direction of the lamination tape. By constraining the tape's width-direction flow, the crown roll ensures that the adhesive applies in the intended direction, preventing misalignment issues
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
Prevents wrinkling of the lamination tape by stabilizing its width-direction flow, ensuring smooth attachment to the electrode plate substrate without excessive tension or misalignment.
Implementation Method 1
at least one crown roll (i) disposed in a path of the lamination tape between the input roll and the discharge roll, (ii) disposed in the path between the guide rolls, and (iii) having a maximum height at the center of a width direction of the at least one crown roll that intersects the moving direction of the lamination tape along the path, with the height decreasing from the maximum height toward ends of the at least one crown roll
Data Source
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AI summary
A lamination tape feeding system for an electrode plate substrate is provided. The lamination tape feeding system includes an input roll configured to input a lamination tape to be attached to an uncoated region of the electrode plate substrate to which an active material is applied, a plurality of guide rolls configured to guide the lamination tape, a discharge roll configured to discharge the lamination tape. The system also includes at least one crown roll that is disposed in a path of the lamination tape between the input roll and the discharge roll, disposed in the path between the guide rolls, and has a maximum height at the center of a width direction that intersects the moving direction of the lamination tape, with the height decreasing toward ends the at least one crown roll.