Photovoltaic Sheet Using Composite Fluororesin and Polyolefin Layers
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Solution Overview
Problem
Current fluororesin sheets used in photovoltaic cells have low mechanical strength, adhesive strength, and durability, and are expensive, while polyolefin sheets lack heat resistance, lightfastness, and weather resistance, making them unsuitable for long-term use as a bottom layer in photovoltaic modules.
Innovation Solution
A sheet for photovoltaic cells comprising a resin layer with a silicone resin of specific formula and high refractive fillers, which enhances adhesive strength, moisture resistance, weather resistance, and lightfastness, improving light condensing efficiency and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluororesin sheets are used as the bottom layer, then adhesive strength and durability are improved, but mechanical strength and cost are worsened
Solution Approach 1:
The patent uses a composite material consisting of a fluororesin layer and a polyolefin layer. The fluororesin layer provides adhesive strength and durability, while the polyolefin layer contributes mechanical strength. This composite structure resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
The bottom layer is designed to perform multiple functions simultaneously: the fluororesin layer handles adhesion and durability requirements, while the polyolefin layer provides mechanical support. This multi-functional design allows the system to meet both adhesive strength and mechanical strength requirements without compromise.
2Reliability
If fluororesin sheets are used as the bottom layer, then adhesive strength and durability are improved, but cost is worsened
Solution Approach 1:
The patent creates a composite structure where the expensive fluororesin layer is combined with a less expensive polyolefin layer. This allows the system to achieve the desired adhesive strength and durability from the fluororesin while reducing overall material cost through the use of the more economical polyolefin for the remaining structural requirements.
Solution Approach 2:
The patent applies fluororesin only where it is most needed - in the layer directly contacting the photovoltaic cell for optimal adhesion - while using polyolefin for the bulk structural support. This localized application of the expensive material optimizes performance while controlling costs.
3Ease of manufacture
If polyolefin sheets are used as the bottom layer, then cost is reduced, but heat resistance, lightfastness and weather resistance are worsened
Solution Approach 1:
The patent combines polyolefin with fluororesin in a layered composite structure. The polyolefin provides cost-effective mechanical strength, while the fluororesin layer specifically addresses heat resistance, lightfastness, and weather resistance. This composite approach allows the system to achieve high reliability at lower overall cost.
Solution Approach 2:
The patent applies fluororesin in a specific layer configuration where it provides the necessary thermal and environmental resistance properties, while polyolefin handles mechanical support. This localized functional assignment allows each material to excel at its specialized function while controlling overall system cost.
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 sheet provides excellent heat resistance, lightfastness, weather resistance, and adhesive strength, enhancing the electricity generation efficiency and durability of photovoltaic modules over time.
Implementation Method 1
a high refractive filler that has a refractive index of 1.55 or more with respect to light having a wavelength of 400 nm
Data Source
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Figure 3~4
AI summary
A sheet for a photovoltaic cell is provided. The sheet for a photovoltaic cell has excellent heat resistance, lightfastness, weather resistance, moisture resistance and insulating properties, and may improve light condensing efficiency when applied to a photovoltaic module.