Photovoltaic Module Layout With Insulated Cell-String Spacing
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Solution Overview
Problem
Existing photovoltaic modules have low photoelectric conversion efficiency due to the small size of solar cells, resulting in limited power generation per unit area and potential short-circuiting between adjacent solar cell strings.
Innovation Solution
A photovoltaic module design with a distance of 0.3 mm to 1.5 mm between adjacent solar cell strings, incorporating limiting members made of insulating materials to prevent short-circuiting and maintain a stable spacing, along with a front and back packaging structure to enhance insulation and light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the distance between adjacent solar cell strings is reduced to increase light-receiving area, then photoelectric conversion efficiency is improved, but the risk of short-circuiting between adjacent solar cell strings increases
Solution Approach 1:
The patent introduces limiting members as intermediary components positioned between adjacent solar cell strings. These limiting members physically separate the solar cell strings while maintaining a minimal distance (0.3mm to 1.5mm), thereby preventing short-circuiting while maximizing the light-receiving area. The intermediary structure resolves the contradiction by providing both separation function and space optimization.
Solution Approach 2:
The patent optimizes the distance parameter between adjacent solar cell strings to a specific range (0.3mm to 1.5mm). By precisely controlling this dimensional parameter and introducing limiting members with specific height parameters (0.5mm to 3mm), the solution achieves both close spacing for efficiency and adequate separation for reliability.
2Productivity
If the size of solar cells is increased to improve power generation per unit area, then photoelectric conversion efficiency is improved, but the risk of mutual contact and short-circuiting between adjacent solar cell strings increases
Solution Approach 1:
Limiting members serve as intermediary structures that enable larger solar cell dimensions while maintaining safe separation. The limiting members are positioned between adjacent solar cell strings and extend to prevent contact, allowing each solar cell to be larger for improved power generation without increasing short-circuiting risk.
Solution Approach 2:
The patent segments the spacing function by introducing separate limiting member components between solar cell strings. This segmentation allows independent optimization of solar cell size while the limiting members handle the separation function, resolving the conflict between size increase and contact prevention.
3Reliability
If limiting members are added to prevent short-circuiting, then reliability is improved, but device complexity increases
Solution Approach 1:
The limiting members are designed to perform multiple functions simultaneously: they provide electrical insulation between adjacent solar cell strings, maintain the optimized spacing distance, and structurally support the solar cell arrangement. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved reliability.
Solution Approach 2:
The limiting members are made from insulating materials that can be uniformly applied across all adjacent solar cell string interfaces. This homogeneous approach simplifies manufacturing and assembly compared to complex customized separation structures, balancing reliability improvement with controlled complexity increase.
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 design increases the light-receiving area per unit area, improving photoelectric conversion efficiency and preventing short-circuiting, thereby enhancing the power generation capacity of the photovoltaic module.
Implementation Method 1
whose function is to convert solar energy into electrical energy
Data Source
AI summary
A photovoltaic module and a method for a photovoltaic module are provided. The photovoltaic module includes a photovoltaic cell pack, a front packaging structure, and a back packaging structure. The photovoltaic cell pack includes solar cell strings spaced apart along a width direction of the photovoltaic module. The front packaging structure is arranged on a light-facing surface of the photovoltaic cell pack, and the front packaging structure includes a front sheet and a front packaging layer. The back packaging structure is arranged on a backlight surface of the photovoltaic cell pack, and the back packaging structure includes a back sheet and a back packaging layer. The back sheet and the front sheet jointly clamp the front packaging layer, the photovoltaic cell pack, and the back packaging layer. A distance L1 between two adjacent solar cell strings along the width direction of the photovoltaic module satisfies: 0.3 mm≤L1≤1.5 mm.