Solar Cell Panel Connection Structures Using Different Conductive Materials
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Solution Overview
Problem
Existing solar cell panels face challenges in efficiency, stability, and productivity due to variations in layer design and connection structures, which affect adhesion and electrical connections, leading to increased costs and reduced performance.
Innovation Solution
A solar cell panel design featuring distinct connection structures for interconnectors, using different conductive materials for each connection type, and a connection member made of the same conductive material as the first connection structure, to enhance adhesion and electrical properties while reducing material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single connection structure and conductive material are used for all interconnector connections, then manufacturing simplicity is maintained, but adhesion force and electrical connection properties are insufficient
Solution Approach 1:
The patent applies different conductive materials (first conductive material for solar cell to first interconnector connection, second conductive material for first interconnector to second interconnector connection) to different connection locations based on their specific requirements. This local differentiation optimizes adhesion force and electrical connection properties at each interface while managing overall system complexity.
2Reliability
If different conductive materials are used for different connection structures, then adhesion and electrical properties are improved, but manufacturing complexity and cost increase
Solution Approach 1:
Different conductive materials are selectively applied to different connection interfaces where they are most needed, rather than uniformly across all connections. This targeted approach improves performance while controlling manufacturing complexity by limiting the scope of material differentiation.
Solution Approach 2:
The connection system is segmented into distinct sections with different material properties: the first connection structure uses a first conductive material optimized for solar cell attachment, while the second connection structure uses a second conductive material optimized for interconnector attachment. This segmentation allows each material to be optimized for its specific function.
3Adaptability or versatility
If the connection member uses a different conductive material from the first connection structure, then material versatility is achieved, but electrical connection consistency and adhesion are compromised
Solution Approach 1:
The connection member uses the same first conductive material as the first connection structure, ensuring homogeneous material properties across the solar cell to first interconnector interface. This material consistency maintains excellent electrical connection properties and adhesion strength while allowing the system to accommodate different materials in other connection areas through the second connection structure.
Data Source
AI summary
A solar cell panel includes a solar cell string including a plurality of solar cells connected to each other and arranged in a first direction, a connection member that connects two adjacent solar cells of the plurality of solar cells to each other in the first direction and that is located an overlapped portion between the two adjacent solar cells, the connection member including a first conductive material, a first interconnector connected to an end solar cell positioned at an end of the solar cell string, a second interconnector connected to the first interconnector, a first connection structure that connects the end solar cell to the first interconnector and that includes the first conductive material, and a second connection structure that connects the first interconnector to the second interconnector and that includes a second conductive material that is different from the first conductive material.