Solar Cell Backsheet Blended Resin Layer Heat Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional solar cell backsheets using fluorine-based resins have low mechanical strength, degrade at high temperatures during manufacturing, and are expensive, limiting their heat-resistance, weather-resistance, and durability, as well as increasing the cost of solar cell modules.
Innovation Solution
A solar cell backsheet comprising a substrate layer with a blended resin layer formed from a combination of a fluorine-based resin and a (meth)acrylic-based copolymer resin, including a (meth)acrylic-based monomer and a maleimide-based monomer, which enhances heat-resistance, mechanical properties, and reduces material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fluorine-based resin is used as a rear surface protection sheet, then durability and weather-resistance are improved, but mechanical strength decreases and heat-resistance deteriorates due to degradation at 140-150°C during heat press
Solution Approach 1:
The patent applies composite materials by combining fluorine-based resin with acrylic resin in a specific weight ratio range (70:30 to 90:10). This composite structure allows the fluorine-based resin to provide durability and weather-resistance while the acrylic resin contributes mechanical strength and heat-resistance, preventing degradation during the heat press process at 140-150°C.
2Reliability
If a fluorine-based resin is used as a rear surface protection sheet, then weather-resistance is improved, but heat-resistance deteriorates due to degradation at high temperatures during manufacturing
Solution Approach 1:
The patent uses composite materials by blending fluorine-based resin with acrylic resin in a specific weight ratio (70:30 to 90:10). The acrylic resin component raises the overall heat resistance of the backsheet, allowing it to withstand the heat press temperature range of 140-150°C without degradation, while the fluorine-based resin maintains weather-resistance properties.
3Reliability
If a fluorine-based resin is used as a rear surface protection sheet, then durability is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies composite materials by combining fluorine-based resin with acrylic resin in a specific weight ratio (70:30 to 90:10). This formulation allows the use of less expensive acrylic resin to partially replace the costly fluorine-based resin, thereby reducing manufacturing costs while maintaining durability through the synergistic properties of the composite.
Data Source
AI summary
Provided are a solar cell backsheet including a substrate layer and a blended resin layer including a fluorine-based resin and a (meth)acrylic-based copolymer resin including a (meth)acrylic-based monomer and a maleimide-based monomer formed on at least one surface of the substrate layer, a method of manufacturing the solar cell backsheet, and a solar cell including the solar cell backsheet. Since using the solar cell backsheet provided here can lower a temperature in a solar cell, and improved heat-resistance, weather-resistance, etc. of the solar cell are achieved.