Resin Core Groove Design for Separator Alignment
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Solution Overview
Problem
Lithium-ion battery separators wound around cores tend to misalign during conveyance and production, lacking effective prevention methods as disclosed in existing technologies.
Innovation Solution
A core with a groove extending in a direction substantially equivalent to its circumferential direction is used, made of resin, to prevent misalignment by increasing static friction and ensuring proper alignment of the separator roll.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a smooth core surface is used, then the separator can be easily wound around the core, but the separator becomes misaligned in the widthwise direction during conveyance and production
Solution Approach 1:
The core surface is designed with localized grooves that create specific friction zones. These grooves are positioned to engage with the separator at critical locations, providing localized high friction to prevent widthwise misalignment while maintaining overall ease of winding operation.
Solution Approach 2:
The solution transitions from a two-dimensional smooth surface to a three-dimensional grooved surface. The grooves add vertical depth dimension to the core surface, creating mechanical interlocking features that prevent separator displacement in the widthwise direction without complicating the winding process.
2Manufacturing precision
If a grooved core surface is used to prevent misalignment, then alignment precision is improved, but the device complexity increases
Solution Approach 1:
The grooved surface is segmented into discrete groove features rather than a continuous complex pattern. These segmented grooves are simple in form but effective in function, providing alignment control without requiring complex core structures or multiple components.
Solution Approach 2:
The core surface parameters are modified by adding grooves with specific dimensions (depth, width, spacing). By optimizing these parameters, the core achieves improved alignment precision while maintaining structural simplicity and avoiding excessive device complexity.
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 solution effectively prevents separator misalignment, enhancing the stability and usability of separator rolls during conveyance and battery production by maintaining appropriate static friction levels and reducing surface unevenness transfer.
Implementation Method 1
A groove is formed on an outer circumferential surface of the core, the groove extending in a direction substantially equivalent to a circumferential direction of the outer circumferential surface
Data Source
AI summary
A core prevents a battery separator wound therearound from moving and becoming misaligned on an outer circumferential surface of the core in a widthwise direction of the core. The core allows a separator to be wound around the outer circumferential surface thereof and is made of resin. The core includes a groove formed on the outer circumferential surface thereof, the groove extending in a direction substantially equivalent to a circumferential direction of the outer circumferential surface.