Solar Cell Module Lead Wire Layout for Compact Design
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Solution Overview
Problem
Solar cell modules have inefficiencies due to the additional space required for lead wires outside the solar cell panel, which does not contribute to power generation, increasing the size of the module.
Innovation Solution
The lead wires are arranged in a series configuration without overlapping, with interconnector connection parts aligned in a straight line, reducing the invalid area and allowing for a more compact module design, and an insulating film made of opaque material is used to improve the external appearance and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lead wires are disposed in an additional area outside the solar cell panel, then power transmission function is ensured, but the size of the solar cell panel increases and power generation efficiency decreases
Solution Approach 1:
The patent applies dimensionality change by arranging lead wires in the width direction (horizontal dimension) rather than the length direction (vertical dimension), and by positioning them to overlap with solar cell rows rather than placing them in separate additional areas. This spatial reconfiguration reduces the panel's length while maintaining power transmission functionality.
Solution Approach 2:
The patent merges the lead wire placement with the solar cell array structure by positioning lead wires to overlap with rows of solar cells. This integration eliminates the need for separate additional areas outside the panel, combining the function of power transmission with the power generation area.
2Adaptability or versatility
If multiple lead wires are arranged parallel to each other, then connection to multiple strings is achieved, but overlapping areas increase causing larger module size
Solution Approach 1:
The patent transitions from parallel arrangement in one dimension to a staggered arrangement across multiple dimensions. Lead wires are positioned to overlap with different rows of solar cells in the width direction, creating a two-dimensional distribution pattern that reduces overall module size while maintaining connection capability to multiple strings.
Solution Approach 2:
The patent segments the lead wire arrangement by assigning different lead wires to different rows of solar cells. Each lead wire connects to a specific string through its corresponding solar cell row, creating a segmented connection pattern that optimizes space utilization and reduces overlapping areas.
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 configuration reduces the non-power generating area within the solar cell panel, resulting in a smaller module size and improved aesthetics while maintaining efficient power transmission.
Implementation Method 1
A solar cell converts solar energy into electric energy using a photoelectric transformation effect
Data Source
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AI summary
A solar cell module having a solar cell panel with strings of electrically-coupled solar cells arranged in a row includes one or more lead wires that electrically couple the strings and a junction box. The one or more lead wires are arranged such that they do not overlap with each other and such that one or more of the lead wires includes a portion that overlaps and does not electrically connect to interconnector of a string. The lead wires include an interconnector connection part connected to a respective string interconnector, and the interconnector connection parts of the lead wires are arranged in a straight line.