Photovoltaic Module Silicone Resin Encapsulant
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Solution Overview
Problem
Conventional photovoltaic module encapsulants, such as ethylene vinyl acetate (EVA), suffer from low adhesive strength, moisture permeation, corrosion, UV resistance issues, and internal stress, leading to delamination and reduced efficiency over time.
Innovation Solution
A photovoltaic module using a silicone resin with an aryl group bound to a silicon atom, represented by a specific average composition formula, providing enhanced adhesive strength, moisture resistance, and lightfastness, and a multi-layered encapsulant structure for improved durability and electricity generation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional encapsulant EVA is used, then the module can be assembled, but adhesive strength is low leading to delamination over time
Solution Approach 1:
The patent changes the chemical composition parameters of the encapsulant by introducing a silicone resin containing specific aryl groups (phenyl, tolyl, xylyl) with defined molar ratios. This chemical parameter change fundamentally improves adhesive strength and prevents delamination while maintaining encapsulation functionality.
Solution Approach 2:
The patent creates a composite encapsulant material by combining silicone resin with specific aryl groups and fillers having controlled refractive indices. This composite structure provides both strong adhesion properties and optical transparency, resolving the contradiction between strength and reliability.
2Reliability
If conventional encapsulant EVA is used, then the module can be assembled, but UV resistance is low causing discoloration and efficiency degradation
Solution Approach 1:
The patent modifies the chemical structure parameters by incorporating silicone resin with aromatic groups that inherently possess superior UV stability. This parameter change enables the encapsulant to resist UV-induced discoloration while maintaining high light transmission for electricity generation.
Solution Approach 2:
The patent replaces the conventional EVA encapsulant with a more stable silicone-based encapsulant that has extended service life and resistance to degradation. This substitution eliminates the need for premature replacement due to UV damage, improving long-term reliability.
3Ease of manufacture
If conventional encapsulant EVA is used, then the module can be assembled, but internal stress during curing causes damage to elements
Solution Approach 1:
The patent changes the curing characteristics by using silicone resin that cures with lower internal stress generation. The chemical composition parameters of the silicone resin allow for controlled curing that protects photoelectric transformation elements from stress-induced damage while completing the encapsulation process.
4Reliability
If conventional encapsulant EVA is used, then the module can be assembled, but moisture permeation causes corrosion
Solution Approach 1:
The patent modifies the molecular structure parameters of the encapsulant by using silicone resin with appropriate crosslinking density and hydrophobic characteristics. This parameter change creates a barrier that prevents moisture permeation, thereby eliminating corrosion of internal elements.
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 silicone resin encapsulant exhibits excellent adhesive strength, weather resistance, and light transmission efficiency, enhancing the durability and electricity generation efficiency of the photovoltaic module while preventing delamination and corrosion.
Implementation Method 1
an encapsulant that encapsulates a photoelectric transformation element between the support substrate and the front substrate, and that comprises a silicone resin which comprises an aryl group bound to a silicon atom
Implementation Method 2
The encapsulant is used for encapsulation of the elements to protect them from external environments
Implementation Method 3
A photovoltaic cell or a solar cell is a cell capable of converting light energy into electric energy by using a photoelectric transformation element that is capable of generating photovoltaic power, when exposed to light
Data Source
Figure 1~2
AI summary
A photovoltaic module is provided. The photovoltaic module has excellent electricity generation efficiency and durability.