Solar Cell Back Sheet With Integrated Reflector
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Solution Overview
Problem
Conventional solar cell modules lack a mechanism to enhance energy output beyond protection and waterproofing, failing to optimize light utilization for increased electrical energy generation.
Innovation Solution
A back sheet for solar cell modules incorporating a base member with a resin layer and a reflector, featuring ridged portions and a reflective film, designed to enhance light reflection and scattering, thereby increasing the amount of light available for photoelectric conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional back sheet is used that only provides protection and waterproofing, then the solar cell is protected from moisture and ultraviolet light, but the output of the solar cell module is not enhanced
Solution Approach 1:
The back sheet is designed to perform multiple functions: it provides protection and waterproofing through the base member and resin layer, while also enhancing light utilization and increasing solar cell output through the integrated reflector. This multi-functional design resolves the contradiction by making the back sheet serve both protective and energy-enhancing roles simultaneously.
Solution Approach 2:
The reflector is combined with the base member and resin layer to form an integrated back sheet structure. By merging the protective function (base member and resin layer) with the light-enhancing function (reflector), the invention achieves both protection and output enhancement without requiring separate components, thus resolving the contradiction between functionality and complexity.
2Use of energy by moving object
If a back sheet with reflector is added to enhance light reflection, then the amount of light for photoelectric conversion increases, but the structural complexity of the back sheet increases
Solution Approach 1:
The reflector is integrated into the back sheet structure by combining it with the base member and resin layer. This merging approach allows the light reflection function to be added without requiring a completely separate component system, thereby reducing the increase in structural complexity while still achieving enhanced light utilization.
Solution Approach 2:
The back sheet employs a composite structure consisting of the base member, resin layer, and reflector. This composite material approach allows each component to contribute its specific function (structural support, protection, and light reflection) while forming an integrated whole, resolving the contradiction between enhanced functionality and structural simplicity.
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 back sheet design increases the efficiency of solar cell modules by reflecting and re-introducing light, resulting in a 1.5% higher maximum output compared to conventional modules without this feature.
Implementation Method 1
A back sheet for solar cell modules incorporating a base member with a resin layer and a reflector, featuring ridged portions and a reflective film, designed to enhance light reflection and scattering
Implementation Method 2
designed to enhance light reflection and scattering, thereby increasing the amount of light available for photoelectric conversion
Data Source
AI summary
Discussed is a back sheet for a solar cell module. The back sheet includes a base member and a first layer formed on one surface of the base member, the first layer including a resin. A reflector is formed in at least a portion of the back sheet.