Solar Module Output Wiring Layout With External Backsheet Routing
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Solution Overview
Problem
Conventional solar cell modules require complex wiring of output wiring members inside the module, which complicates the internal structure and increases operational steps, and are susceptible to shading that affects power generation efficiency.
Innovation Solution
The output line connection structure for a solar cell module involves connecting output wiring members to bus bars at the ends of solar cell connection units, with the wiring extending through outlets in the back surface protection member to the outside, and using insulated connection wiring members to connect to a terminal box, which includes bypass diodes in parallel with the solar cell connection units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If output wiring members are routed inside the solar cell module to the terminal box, then electrical connection is achieved, but the wiring structure becomes complex and insulation requirements increase
Solution Approach 1:
The output wiring members are extracted from the internal routing path and brought out through outlets in the back surface protection member. This allows the wiring to be routed externally rather than through the complex internal structure, simplifying the wiring structure while maintaining electrical connection reliability
Solution Approach 2:
The back surface protection member serves as an intermediary structure that provides outlets for the output wiring members. This mediator allows the wiring to pass through the back surface without requiring complex internal routing or insulation arrangements within the module
2Ease of operation
If multiple second wiring members are arranged in lines on the back surface side, then output extraction is enabled, but operational steps and routing complexity increase
Solution Approach 1:
The second wiring members are taken out from the constrained internal arrangement and extended through outlets to the external environment. This extraction eliminates the need for complex routing arrangements on the back surface and reduces the number of operational steps required for connection
Solution Approach 2:
Instead of routing wiring members from the front surface through the module to the back surface, the invention inverts the approach by bringing the wiring members out through the back surface protection member directly, simplifying the routing path and reducing operational complexity
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 simplifies internal wiring, reduces the impact of shading on power generation, and enhances operational efficiency by minimizing complex routing and insulation requirements, allowing for various installation modes and improved power generation performance.
Implementation Method 1
A solar cell module includes solar cell strings in which a plurality of solar cells as power generating elements is electrically connected in series
Implementation Method 2
When a trouble occurs in a part of the solar cell strings, an electric current is allowed to flow without passing the troubled solar cell string(s)
Data Source
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AI summary
A solar cell module includes a solar cell string sealed between a transparent substrate and a back surface protection member. The solar cell string includes solar cell connection units in each of which a plurality of solar cells adjacent in a first direction is connected in series with each other. Each of the solar cell connection units is provided with an output wiring member. The output wiring member extends to an outside through the back surface protection member. Outlets and a terminal box are positioned apart from each other in an in-plane direction of the back surface protection member.