Opposed Wire Pressing for Faster Solar Cell Tabbing
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Solution Overview
Problem
Conventional cell-jig transfer devices require multiple operations to seat solar cells and wires, leading to a time-consuming tabbing process.
Innovation Solution
A pressing device with first and second pressing members, each comprising pressing pins and bodies, stabilizes wire fixation to solar cells by pressing from opposite surfaces, utilizing ceramic materials and elastic members for precise alignment and contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cell-jig transfer devices perform multiple operations to seat solar cells and wires, then the tabbing process can be completed, but the operation time increases significantly
Solution Approach 1:
The pressing device is divided into multiple pressing members (first pressing member with first pressing pin, second pressing member with second pressing pin) that simultaneously press different portions of the wire from opposite surfaces. This segmentation allows parallel processing of wire fixation, reducing the sequential operation time while maintaining reliable fixation stability.
Solution Approach 2:
The pressing members are positioned and configured in advance to press the wire portions simultaneously when the solar cell is placed between them. This preliminary arrangement of pressing positions and forces eliminates the need for multiple sequential seating operations, significantly reducing operation time while ensuring stable wire fixation.
2Reliability
If pressing members are used to stabilize wire fixation, then wire stability improves, but device complexity increases
Solution Approach 1:
The pressing function is extracted as a separate, dedicated device with simple pressing members that apply force only where needed. This extraction allows the pressing mechanism to be independently optimized for reliability without adding complex control systems, as the pressing members operate based on simple mechanical positioning rather than complex automation.
Solution Approach 2:
Each pressing member is designed with specific local characteristics (first pressing pin for first wire portion, second pressing pin for second wire portion) to provide targeted pressing force. This local quality approach ensures stable wire fixation at critical points without requiring the entire device to be complex, as only specific localized pressing actions are needed.
3Manufacturing precision
If multiple pressing members are used to press wire portions from opposite surfaces, then wire fixation is stabilized, but manufacturing complexity increases
Solution Approach 1:
The first and second pressing members are configured with asymmetric positioning and pressing characteristics suited to their respective wire portions. This asymmetric design allows each pressing member to be manufactured with simple, specialized geometry rather than requiring complex symmetric mechanisms, improving wire positioning precision while maintaining ease of manufacture through straightforward component design.
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
Enhances the efficiency of the tabbing process by stabilizing wire fixation, reducing operation time, and preventing wire fusion during bonding.
Implementation Method 1
an elastic member configured to elastically support the first pressing pin with respect to the first pressing body
Data Source
AI summary
The present disclosure relates to a pressing device and a tabbing apparatus including the same, and the pressing device includes a first pressing member configured to press a first portion of a wire seated on a first surface of a solar cell and a second pressing member spaced apart from the first pressing member and configured to press a second portion of the wire seated on a second surface opposite to the first surface.