Solar cell backboard

A technology for solar cells and back sheets, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of reducing water vapor transmission rate, cumbersome composite process, poor insulation effect, etc., to avoid the decline of coating covering power, The effect of simple process flow and low production cost

Active Publication Date: 2016-07-20
乐凯胶片股份有限公司
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese patents CN200910180618.X, CN200920220234.1, and CN200920220236.0 use a backboard containing aluminum foil or aluminum film, which greatly reduces the water vapor transmission rate, but the insulation effect is relatively poor, which is likely to cause partial discharge and leakage phenomenon
Chinese patent CN201320597382.1 uses an adhesive to bond the glass film between the PET and the outer weather-resistant layer, which can effectively protect the solar cell from water vapor and environmental erosion, but the compounding process is cumbersome

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
  • Solar cell backboard
  • Solar cell backboard
  • Solar cell backboard

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The preparation process of titanium dioxide-coated layered silicate composite particles is as follows:

[0030] (1) To prepare slurry, add the dried phyllosilicate powder into water, ball mill at 300-1000r / min for 10-40min, add ball-milling aids and continue to mill at 300-1000r / min for 30-90min.

[0031] (2) Add titanium dioxide to the ball mill, adjust the pH of the slurry to be between 2.0 and 7.5, mill at 300-1000r / min for 10-40min, add ball milling aids and continue to mill at 300-1000r / min for 30- 90min;

[0032] (3) Washing, filtering, drying, and sieving the obtained slurry to obtain composite particles of titanium dioxide-coated layered silicate.

[0033] The ball milling aid is silane, titanate, aluminate, polyethylene glycol, stearic acid, acrylic acid, methacrylic acid, crotonic acid, maleic acid, polyacrylic acid or its salts, sodium hexametaphosphate, DTAB , TTAB, CTAB, OTAB, preferably, the ball milling aid is one or more of polyethylene glycol, polyacr...

Embodiment 1

[0042] Weather-resistant layer: fluorocarbon resin coating, in which,

[0043]

[0044] 1. The preparation process of composite particles:

[0045] (1) To prepare the slurry, dry 10 parts of sericite with a d50 of 1.80 μm at low temperature, add it to deionized water, ball mill it at 800 r / min for 30 minutes, add 0.1 part of aminopropyltrimethoxysilane coupling agent and continue the ball milling, The ball milling speed is 800r / min and the ball milling time is 40min.

[0046] (2) Add 2 parts of titanium dioxide with a d50 of 0.36 μm into (1), ball mill at 600r / min for 30min, add hydrochloric acid to adjust the pH to 5.0, and continue ball milling at 600r / min for 50min. Washing, filtering, drying, and sieving to obtain composite particles of sericite coated with titanium dioxide.

[0047] The ball milling medium is zirconia, the size ratio is 1.5mm: 1.2mm: 0.8mm = 4:3:3, and the ball-to-material ratio is about 4:1. The slurry concentration was 50%.

[0048] 2. Add 20 par...

Embodiment 2

[0053] Weather-resistant layer: fluorocarbon resin coating, in which,

[0054]

[0055] 1. The preparation process of composite particles:

[0056] (1) To prepare slurry, dry 5 parts of sericite with d50=0.40 μm at low temperature, add it into deionized water, ball mill at 800r / min for 30min, add 0.1 part of aminopropyltrimethoxysilane coupling agent and continue ball milling, The ball milling speed is 800r / min and the ball milling time is 40min.

[0057] (2) Add 4 parts of d50=0.36 μm titanium dioxide to (1) and ball mill at 600r / min for 30min, add hydrochloric acid to adjust the pH to 5.0, and continue ball milling at 600r / min for 50min. Washing, filtering, drying, and sieving to obtain composite particles of sericite coated with titanium dioxide.

[0058] 2. The ball milling medium is zirconia, the size ratio is 1.5mm: 1.2mm: 0.8mm = 4:3:3, and the ball-to-material ratio is about 4:1. The slurry concentration was 50%. Add 12 parts of ethyl acetate and 15 parts of but...

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
Login to view more

Abstract

The invention relates to a solar cell backboard. The backboard comprises a weather resistance layer, a base material layer and a polyolefin layer. A weather resistance coating is obtained by coating and drying a weather resistance coating liquid. An inorganic filler in the weather resistance coating liquid is formed by 5-90% titanium dioxide coating shape silicate composite particles and 10-95% titanium dioxide. The backboard in the invention maintains a high-efficiency ultraviolet absorption ability, and simultaneously water resistance performance, insulation performance, salt-fog resistance performance and the like can be improved so that overall performance of the backboard is increased.

Description

technical field [0001] The invention relates to the technical field of photovoltaic cells, in particular to a solar cell backboard. Background technique [0002] As a protective material for solar cells, the solar cell backsheet has good aging resistance to ensure the life and output efficiency of solar cells. With the development of society, people put forward more and higher requirements for backplanes, such as lower water vapor transmission rate, better insulation and aging resistance, and lower production costs. At present, a film layer with a low water vapor transmission rate is usually provided in the back sheet to improve the water vapor barrier performance of the back sheet, so that the service life of the solar cell is greatly improved. For example, Chinese patents CN200910180618.X, CN200920220234.1, and CN200920220236.0 use a backboard containing aluminum foil or aluminum film, which greatly reduces the water vapor transmission rate, but the insulation effect is r...

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 Applications(China)
IPC IPC(8): H01L31/049H01L31/0216
CPCY02E10/50H01L31/049H01L31/02167
Inventor 董云肖梁宏陆吕小波
Owner 乐凯胶片股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap