Solar Cell Module Light Diffusion Sheet Gap Management
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Solution Overview
Problem
Conventional solar cell modules have limited light use efficiency, leading to suboptimal energy output due to gaps between solar cells and frames that cause short circuits and reduce sunlight incidence.
Innovation Solution
Incorporating light diffusion sheets between solar cell strings and at the edges, made from materials like PET with a metal film, to reflect and redirect incident sunlight onto photovoltaic regions, enhancing energy capture and output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solar cells are electrically connected in series with conductive wiring members and protected by glass and resin fillers, then the solar cell module structure is protected and electrical connectivity is achieved, but the gaps required between solar cells and frames reduce light use efficiency and output
Solution Approach 1:
The patent applies this principle by converting the harmful effect of gaps (which cause light loss and potential short circuits) into a beneficial feature by filling these gaps with light reflection members. The reflection members redirect light that would otherwise be lost into the solar cells, transforming the problematic gap space into an opportunity for enhanced light utilization and increased output.
Solution Approach 2:
The patent introduces light reflection members as intermediary elements between the solar cells and the external environment. These reflection members act as mediators that intercept light in the gap regions and redirect it toward the solar cells, effectively mediating the interaction between incident light and the photovoltaic elements to improve overall light capture efficiency.
2Reliability
If adjacent solar cells are disposed at certain intervals to prevent short circuits, then electrical safety is ensured, but the spaces between solar cells reduce the area available for sunlight incidence
Solution Approach 1:
The patent converts the harmful effect of required gaps (which reduce active area) into a benefit by placing light reflection members in these gap regions. The reflection members capture light in the previously wasted space and redirect it to the solar cells, effectively converting the non-productive gap area into an auxiliary light-capturing zone that enhances overall energy generation.
Solution Approach 2:
The patent extends light capture into the dimensional space of the gaps by positioning light reflection members vertically between the solar cells. This utilizes the three-dimensional space that would otherwise be empty, adding another dimension to light interception and redirection, thereby increasing the effective light-capturing volume without reducing the planar arrangement of solar cells.
3Reliability
If outermost solar cells are disposed at intervals from the metallic frame to prevent short circuits, then electrical isolation is achieved, but the edge spaces reduce overall module output
Solution Approach 1:
The patent applies this principle by transforming the potentially harmful edge gaps (which cause light loss and reduce output) into beneficial light-redirection zones. Light reflection members are positioned at the edges between the outermost solar cells and the metallic frame, converting the wasted edge space into an active light-capturing region that redirects light onto the solar cells, thereby increasing module output while maintaining electrical isolation.
Solution Approach 2:
The patent applies local quality by specifically targeting the edge regions with light reflection members. Rather than uniformly treating the entire module surface, the invention focuses on enhancing light capture in the specific gap regions at the edges where solar cells meet the metallic frame. This localized approach optimizes light utilization in the previously underutilized edge spaces without affecting the overall structural design.
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 solution significantly increases the energy output of solar cell modules by ensuring that a higher percentage of incident sunlight is utilized, improving the overall efficiency and reliability of the module.
Implementation Method 1
Incorporating light diffusion sheets between solar cell strings and at the edges, made from materials like PET with a metal film, to reflect and redirect incident sunlight onto photovoltaic regions
Data Source
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AI summary
A solar cell module includes: first and second solar cell strings each including solar cells arranged in an arrangement direction and electrically connected to one another; and a light diffusion sheet disposed between the first and second solar cell strings. The first and second solar cell strings are disposed adjacent to each other and parallel to each other along the arrangement direction. The light diffusion sheet is disposed such that both side edge portions of the light diffusion sheet overlap light-receiving surface sides of side edge portions of the first and second solar cell strings.