Shingled Solar Cell Ribbon Bonding for Automated Module Assembly
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Solution Overview
Problem
Current solar module assembly processes are inefficient, leading to increased labor costs and reduced yield due to manual handling and lack of automation in bonding metal ribbons for electrical connections between solar cells, which can result in suboptimal performance and potential solar cell breakage during assembly.
Innovation Solution
An automated apparatus and method for attaching metal ribbons to solar cells using an inspection and ECA dispensing component, which prepares, inspects, and bonds metal ribbon segments to the front and rear surfaces of solar cells in a shingled manner, enabling efficient electrical connections between hyper cells arranged in series and parallel configurations, thereby improving yield and reducing labor costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual handling and bonding processes are used for assembling solar modules, then labor flexibility is maintained, but productivity is reduced and manufacturing precision deteriorates
Solution Approach 1:
The patent replaces manual mechanical handling with an automated bonding apparatus that uses controlled mechanical systems for positioning and bonding metal ribbons to solar cells. The system incorporates automated dispensing of electrically conductive adhesive and precision positioning mechanisms to eliminate manual labor while maintaining high productivity and precision.
Solution Approach 2:
The bonding apparatus is designed to automatically perform multiple functions including inspection, adhesive dispensing, and bonding without requiring external manual intervention. The system self-regulates the bonding process through integrated control mechanisms that monitor and adjust parameters in real-time during assembly.
2Manufacturing precision
If manual bonding processes are used, then equipment complexity is reduced, but manufacturing precision and reliability deteriorate
Solution Approach 1:
The patent combines multiple functions including inspection, adhesive dispensing, positioning, and bonding into a single integrated apparatus. This merging of functions enables high manufacturing precision through coordinated control of all operations while managing overall system complexity through unified design rather than separate independent systems.
Solution Approach 2:
The bonding apparatus is designed as a multi-functional system that performs inspection, adhesive application, positioning, and bonding operations. This universal design allows a single complex apparatus to handle multiple critical functions, achieving high precision through integrated control while avoiding the need for multiple separate specialized devices.
3Productivity
If automated bonding is implemented, then productivity increases, but device complexity increases
Solution Approach 1:
The automated bonding apparatus is divided into distinct functional modules including inspection components, adhesive dispensing systems, positioning mechanisms, and bonding units. This segmentation allows each module to be optimized independently for its specific function while working together as an integrated system, managing complexity through modular design while maintaining high productivity.
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 automated process enhances the efficiency of solar module assembly by ensuring accurate and consistent bonding of metal ribbons, increasing the yield of functional solar cells and reducing the risk of breakage, while integrating multiple assembly steps into a single stage for increased productivity and cost-effectiveness.
Implementation Method 1
The metal ribbon segment is conductively bonded to a front surface of a solar cell through an electrically conductive adhesive (ECA)
Data Source
AI summary
Solar cell devices as well as method and apparatus for producing solar cell devices are disclosed. Aspects of the disclosure provide a solar cell device that includes a string of solar cells. The string of solar cells are conductively connected in series and arranged in a shingled manner with sides of adjacent solar cells being overlapped. A first metal ribbon segment is conductively bonded to a front surface of an end cell, the front surface being configured to face a light incoming direction to receive energy from a light source.