Solar Cell Panel Diode Member Integration
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Solution Overview
Problem
Conventional solar cell panels face increased manufacturing costs and efficiency deterioration due to complex structures required for block and bypass diodes, which are necessary to prevent reverse voltage and hot spots, respectively.
Innovation Solution
Incorporating diode members formed from solar cell units into the solar cell panel, positioned at non-light-incident regions, which simplifies the connection structure and reduces manufacturing costs by eliminating the need for separate junction boxes for diodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If block diodes and bypass diodes are installed using separate semiconductor devices, then reverse voltage and hot spots can be prevented, but the connection structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent merges the block diode and bypass diode functions into a single integrated diode member that is directly formed on the solar cell substrate. This integration eliminates the need for separate semiconductor devices and complex connection structures, while maintaining the protective functions against reverse voltage and hot spots.
Solution Approach 2:
The diode member is designed to perform multiple functions simultaneously: it acts as both a block diode to prevent reverse voltage and a bypass diode to prevent hot spots. This multi-functional design reduces the number of components needed and simplifies the overall structure.
2Reliability
If block diodes and bypass diodes are installed using separate semiconductor devices, then reverse voltage and hot spots can be prevented, but manufacturing cost increases
Solution Approach 1:
The patent merges the block diode and bypass diode functions into a single integrated diode member that is directly formed on the solar cell substrate. This integration eliminates the need for separate semiconductor devices and complex connection structures, while maintaining the protective functions against reverse voltage and hot spots.
Solution Approach 2:
The diode member is self-formed on the solar cell substrate using the same semiconductor processing steps, eliminating the need for external semiconductor devices and reducing manufacturing complexity and cost.
3Reliability
If solar cells are spaced apart to provide bypass current structure, then current bypassing is enabled, but the active photoelectric conversion area is reduced and efficiency deteriorates
Solution Approach 1:
The patent implements the bypass current path within the plane of the solar cell substrate by forming the diode member directly on the substrate. This approach enables current bypassing without requiring spatial separation of solar cells, thereby maintaining the active photoelectric conversion area and efficiency.
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
This approach reduces manufacturing costs and maintains or improves panel efficiency by integrating diode members directly into the panel structure, preventing damage from reverse voltage and hot spots without compromising active photoelectric conversion areas.
Implementation Method 1
The diode member is formed of a solar cell unit positioned at a non-light-incident region
Data Source
AI summary
A solar cell panel can include a plurality of solar cells; and a diode member connected to the plurality of solar cells, the diode member being formed of a solar cell unit disposed within the solar cell panel under at least a portion of one of the plurality of solar cells at a non-light-incident region.