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

A solar battery backplane

A solar cell and backplane technology, which is applied in the field of solar energy, can solve the problems that the backplane cannot be used in solar power generation systems, the glass fiber cloth lamination process is cumbersome, and the cost of glass fiber cloth is high, so as to reduce the number, improve the mechanical properties, and improve the relative capacitive effect

Active Publication Date: 2017-08-11
乐凯胶片股份有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, mainstream photovoltaic modules and supporting components are designed and manufactured based on the voltage requirement of 1000V at the DC terminal. The existing backplane cannot be used for solar power generation systems with a maximum system voltage of 1500V, and the partial discharge can only reach 1000-1200V.
For example, as described in patents CN201110316402.9 and CN201120314438.9, glass fiber cloth is used to endow the backplane with high pressure resistance to improve the partial discharge voltage of the backplane. In this solution, the lamination process of glass fiber cloth is cumbersome and the cost of glass fiber cloth is relatively high. ;Patent: CN201320878102.4 adopts a thickened backplane base material layer, and increases the partial discharge voltage of the backplane by increasing the overall thickness of the backplane. The backplane made by this scheme is too thick to make subsequent processing difficult; patent CN200980159535 .0 said that by setting a conductive layer on the surface of the backplane to control the surface resistance, when a high voltage is applied in the thickness direction of the backplane, a part of the electric field can be properly conducted and diffused along the surface, reducing the voltage applied in the thickness direction of the backplane To improve the partial discharge voltage of the overall backplane, this scheme can achieve the purpose of increasing the partial discharge voltage of the backplane to a certain extent, but simply setting a conductive layer cannot make the existing mainstream photovoltaic backplane achieve the purpose of a partial discharge voltage of 1500V

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
  • A solar battery backplane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weather-resistant layer: fluorocarbon resin coating with polyethylene oxide added, thickness 20μm.

[0037] Substrate layer: PET with a thickness of 300 μm.

[0038] Polyolefin layer:

[0039] Wash 200 grams of hollow silica filler with dilute hydrochloric acid with a mass concentration of 18%, rinse twice with water, and dry at 120°C; then add 0.5% vinyltrichlorosilane alcohol (analytical pure) solution into dry hollow silica, stir evenly and dry at 80°C for later use;

[0040] 80 grams of polyethylene resin, 15 grams of hollow silica (particle size 100nm, wall thickness 40nm), 4 grams of solid silica, 0.1 grams of 2,6-tertiary butyl-4-methylphenol and After mixing 0.9 grams of 2,4-dihydroxybenzophenone, extrude and granulate through a twin-screw extruder, so that the components are mixed evenly. The mixed material was cast and extruded to obtain a polyolefin layer with a thickness of 100 μm.

[0041] Preparation of the back sheet: Coating a weather-resistant coati...

Embodiment 2

[0043] Weather-resistant layer: polyvinylidene fluoride film added with polyether finger amide, thickness 25μm.

[0044] Substrate layer: PET substrate with a thickness of 300 μm.

[0045] Polyolefin layer:

[0046] Wash 200 grams of hollow silica packing with 10% dilute hydrochloric acid, rinse twice with water, and dry at 100°C; Add to dry hollow silica, stir evenly and dry at 60°C for later use;

[0047] 82 grams of polyethylene resin, 8.5 grams of hollow silica (particle size 80nm, wall thickness 10nm), 8.5 grams of solid silica, 0.3 grams of bis (3,5-tertiary butyl-4-hydroxyphenyl ) thioether and 0.7 g of 2-hydroxy-4-methoxybenzophenone were mixed, extruded and granulated by a twin-screw extruder, so that the components were mixed evenly. The mixed material was cast and extruded to obtain a polyolefin layer with a thickness of 110 μm.

[0048] Preparation of the back sheet: one side of PET with a thickness of 300 μm is laminated with a weather-resistant film layer thr...

Embodiment 3

[0050] Weather-resistant layer: polyvinylidene fluoride film added with polyetheramideimide, thickness 25μm.

[0051] Substrate layer: PET substrate with a thickness of 300 μm.

[0052] Polyolefin layer:

[0053] Wash 200 grams of hollow silica filler with dilute hydrochloric acid with a concentration of 15%, rinse with water twice, and dry at 110°C; Pure) solution was added to dry hollow silica, stirred evenly and dried at 70°C for later use;

[0054] 85 grams of polyethylene resin, 10 grams of hollow silica (particle size 70nm, wall thickness 20nm), 4 grams of solid silica, 0.5 grams of thiodipropionate and 0.5 grams of 2-hydroxy-4 - After n-octyloxybenzophenone is mixed, it is extruded and granulated by a twin-screw extruder, so that the components are mixed evenly. The mixed material was cast and extruded to obtain a polyolefin layer with a thickness of 120 μm.

[0055] Preparation of the back sheet: one side of PET with a thickness of 300 μm is laminated with a weathe...

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
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a solar cell backplane comprising a weather resistance layer, a substrate layer and a polyolefin layer. The polyolefin layer is prepared through the following steps: a polyolefin composition is mixed and is subjected to extrusion granulation; and the polyolefin layer is prepared through a casting or blowing method. The polyolefin composition comprises, by mass, 70-90 parts of polyolefin resin, 10-30 parts of an inorganic filler, 0.1-1 part of antioxidant and 0.1-1 part of a light stabilizer. The inorganic filler is composed of 10-100% of a hollow inorganic filler and 0-90% of a solid inorganic filler. According to the invention, the inorganic filler is pretreated, the addition amount of the inorganic filler in the polyolefin layer composition is improved, and the proportions of the hollow filler and the solid filler are optimized, such that the partial discharge voltage of the solar cell backplane can be improved to higher than 1500V.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a solar cell backboard. Background technique [0002] In recent years, as a representative of green energy, solar power generation has attracted more and more attention. At present, the application of solar energy is mainly to use solar power generation components to convert solar energy into electrical energy for utilization. Solar power generation components are mainly composed of front plates, packaging materials, crystalline silicon cells, and back plates. The solar backsheet is located on the back of the solar panel, which protects and supports the solar panels. [0003] At present, mainstream photovoltaic modules and supporting components are designed and manufactured based on the voltage requirement of 1000V at the DC terminal. The existing backplane cannot be used for solar power generation systems with a maximum system voltage of 1500V, and the partial discharge ca...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08K13/06C08K9/06C08K3/36C08K5/13C08K5/132C08K5/375C08K5/372C08K3/22C08K5/134H01L31/049
CPCY02E10/50
Inventor 吕小波梁宏陆董云肖
Owner 乐凯胶片股份有限公司
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