Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Three-layer structural PET (polyethylene terephthalate) film and solar battery back plate prepared from three-layer structural PET film

A solar cell and three-layer structure technology, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low light reflectance affecting the power generation efficiency of cells, low UV resistance, and difficult repair of components, so as to improve thermal conductivity and light reflection High efficiency, good long-term aging resistance and simple structure

Inactive Publication Date: 2015-04-15
CYBRID TECHNOLOGIES INC
View PDF6 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The back sheet has the following disadvantages: the thicker back sheet has poor thermal conductivity, poor heat resistance, low light reflectance affects the power generation efficiency of the battery, and low UV resistance has caused premature pulverization of the material on one side of the battery, yellowing, cracking and aging Failure, component repair is difficult and expensive

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Three-layer structural PET (polyethylene terephthalate) film and solar battery back plate prepared from three-layer structural PET film
  • Three-layer structural PET (polyethylene terephthalate) film and solar battery back plate prepared from three-layer structural PET film
  • Three-layer structural PET (polyethylene terephthalate) film and solar battery back plate prepared from three-layer structural PET film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 Shown is a schematic diagram of the structure of a PET film with a three-layer structure. The PET film 4 with a three-layer structure includes an intermediate layer 3 in the middle and an outer layer 1 and an inner layer 2 located on both sides of the intermediate layer. The three-layer PET film is biaxially stretched and co-extruded, and is produced continuously at one time. The thickness of the PET film 4 is 0.100mm, wherein the thickness of the outer layer 1 is 0.020mm, the thickness of the middle layer 3 is 0.060mm, and the thickness of the inner layer 2 is 0.020mm; the surface gloss of the outer layer 1 is 60, and the surface gloss of the inner layer 2 is 60, where the angle of light projection for measuring gloss is 60° in line with GB / T9754-2007 and international standard ISO2813:1994.

[0034] The outer layer 1 can block more than 99% of 280-400nm ultraviolet rays. After 280-400nm ultraviolet rays of 90KWh / ㎡ are irradiated, the yellowing index ...

Embodiment 2

[0044] The structure and preparation method of the three-layer PET film in this example are the same as in Example 1. Wherein the thickness of the PET film 4 is 0.300mm, wherein the thickness of the outer layer 1 is 0.050mm, the thickness of the middle layer 3 is 0.200mm, and the thickness of the inner layer 2 is 0.050mm; the surface gloss of the outer layer 1 is 100, and the surface gloss of the inner layer 2 for 100. The inner layer 2 contains no inorganic filler. The inner and outer layers can block more than 99% of 280-400nm ultraviolet rays. After 280-400nm ultraviolet rays are 90KWh / ㎡irradiated, the yellowing index ▽b<3; hydrolysis resistance, PCT test 121°C, 100% humidity, after 72 hours, The remaining elongation at break is above 10%. Integrating sphere method gives the inner and outer surface reflectance as 100%. The PET film 4 with the above-mentioned three-layer structure has undergone a PCT test at 121° C. and 100% humidity, and after 48 hours, there is no abnor...

Embodiment 3

[0051] The structure and preparation method of the three-layer PET film in this example are the same as in Example 1. Wherein the thickness of the PET film 4 is 1.000mm, wherein the thickness of the outer layer 1 is 0.010mm, the thickness of the middle layer 3 is 0.980mm, and the thickness of the inner layer 2 is 0.010mm, wherein the inner layer 2 contains calcium carbonate, carbon black mixed inorganic filler, containing is 10%; the surface gloss of the outer layer 1 is 10, and the surface gloss of the inner layer 2 is 10. Integrating sphere method gives the inner and outer surface reflectivity of 30%. The PET film 4 with the above-mentioned three-layer structure has undergone a PCT test at 121° C. and 100% humidity, and after 48 hours, there is no abnormal appearance, no bubbles, cracks, discoloration, etc., and the yellowing index ▽b<3.

[0052] In this example, the structure of the solar cell backboard composed of the above-mentioned three-layer PET film and the assembled...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a three-layer structural PET (polyethylene terephthalate) film and a solar battery back plate prepared from the three-layer structural PET film, and the three-layer structural PET film is formed by two-way stretching and co-extrusion of an interlayer PET film located in the middle and an inner layer PET film and an outer layer PET film which are located at two sides of the interlayer PET film. The three-layer structural PET film has thin thickness, high thermal conductivity, high reflection rate, good long-term aging resistance and other good performances. The solar battery back plate can be prepared by using the three-layer structural PET film as a substance, coating one side of the three-layer structural PET film with a weather-proof coating layer, and bonding an insulating film layer by use of an adhesive layer. On the basis of good thermal conductivity, reflection performance and aging resistance of the three-layer structure-based PET film, compared with the prior art, the solar battery back plate has better heat resistance and weather resistance, and has the advantages of being simple in structure and easy to repair.

Description

technical field [0001] The present invention relates to a kind of polyester (PET) film and the solar cell backboard that is made of this film, relate to a kind of polyester (PET) film with three-layer structure more specifically, and the high weather resistance that is made of this film and high adhesion solar cell backsheet. Background technique [0002] A solar cell module is usually a stacked structure, mainly including a glass layer, an EVA encapsulation layer, a silicon battery sheet, an EVA encapsulation layer and a solar cell module backplane, in which the silicon cell sheet is sealed and wrapped by two layers of EVA film. The main function of the solar cell module backsheet is electrical insulation, improving the mechanical strength of the solar cell module, preventing water vapor from penetrating into the sealing layer, and affecting the life of the cell and power generation efficiency. Since the solar cell module backsheet is the outermost part of the solar cell m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B32B27/36H01L31/049H02S40/42H02S40/22
CPCY02E10/52B32B27/08B32B7/12B32B27/36
Inventor 陈洪野夏修旸吴小平宇野敬一
Owner CYBRID TECHNOLOGIES INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com