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A solar battery backplane

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

Active Publication Date: 2017-12-26
乐凯胶片股份有限公司
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  • 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

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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...

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Abstract

The invention relates to a solar battery back sheet, comprising a weather-resistant layer, a substrate layer and a polyolefin layer, the weather-resistant coating is obtained by coating and drying a weather-resistant coating liquid, and the inorganic filler in the weather-resistant coating liquid consists of 5- Composed of 90% titanium dioxide-coated layered silicate composite particles and 10-95% titanium dioxide. While maintaining high-efficiency ultraviolet absorption capacity, the backboard of the present invention can improve its water resistance, insulation and salt spray resistance, thereby improving the overall performance of the backboard.

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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/049H01L31/0216
CPCY02E10/50
Inventor 董云肖梁宏陆吕小波
Owner 乐凯胶片股份有限公司
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