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Back plane for high thermal conductivity solar cell and preparation method thereof

A solar cell, high thermal conductivity technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as insufficient heat dissipation, complex backplane structure, and adhesive layer failure, to meet industrial scale production requirements, process The effect of simple steps, excellent weather resistance and aging resistance

Active Publication Date: 2016-06-01
CHANGSHU TOP SOLAR MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent application scheme has improved the adhesive layer, that is, the thermally conductive adhesive layer and the metal plate are used, but limited by the low thermal conductivity of PET, it is also not enough to achieve the heat dissipation effect expected by the industry, and the backplane structure is complicated. And there is a risk of failure of the bonding layer during use, that is, within the service period

Method used

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  • Back plane for high thermal conductivity solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A) Prepare the base layer 1, buy a polyethylene terephthalate film from a commercial channel as the base layer 1;

[0035] B) To prepare weather-resistant layer 3, first 20 parts of polytetrafluoroethylene resin, 20 parts of polyvinylidene fluoride resin, 30 parts of polymethacrylate methyl resin, 20 parts of aluminum oxide and flow modified Put 3 parts of triethyl phosphate into a container equipped with a stirrer and mix evenly to obtain a compound, then put the compound into a twin-screw extruder for melt extrusion, and the melt extrusion of the twin-screw extruder The temperature control of the first zone is 160°C, the second zone to the fifth zone is 190°C, the time of the material, that is, the mixture, in the twin-screw extruder is controlled for 5 minutes, and after exiting the twin-screw extruder, it is cooled and pelletized to obtain pellets , and then put the pellets into the film blowing machine to blow the film to obtain a fluorine-containing copolymer laye...

Embodiment 2

[0039] A) Prepare the base layer 1, and purchase a polybutylene terephthalate film from a commercial channel as the base layer 1;

[0040] B) To prepare the weather-resistant layer 3, first put 60 parts of polyethylene resin, 10 parts of polymethacrylic acid methyl resin, 30 parts of zinc oxide and 1 part of tributyl phosphate, which are flow modifiers, in parts by weight. Mix evenly in a container equipped with an agitator to obtain a mixture, and then put the mixture into a twin-screw extruder for melt extrusion. To 190°C in the fifth zone, the time for the material, that is, the mixture, in the twin-screw extruder is controlled to be 10 minutes. After exiting the twin-screw extruder, it is cooled and pelletized to obtain pellets, and then put the pellets into the casting machine for casting Film formation (i.e. cast film formation, the same below), to obtain a fluorine-containing copolymer layer with thermally conductive fillers added, which is the weather-resistant layer 3...

Embodiment 3

[0044] A) Prepare the base layer 1, buy a polyethylene naphthalate film from a commercial channel as the base layer 1;

[0045] B) To prepare weather-resistant layer 3, 50 parts of polyvinylidene fluoride resin, 20 parts of polymethacrylic acid methyl resin, 10 parts of aluminum oxide and flow modifier, i.e. Put 2 parts of octyl ester, 2 parts of dicaproic acid phthalate, and 1 part of dimethyl phthalate into a container equipped with a stirrer and mix evenly to obtain a mixture, and then put the mixture into a twin-screw extruder For medium melt extrusion, the melt extrusion temperature of the twin-screw extruder is controlled at 160°C in the first zone, and 190°C in the second to fifth zones. After the screw extruder is cooled and pelletized, the pellets are obtained, and then the pellets are put into the film blowing machine to blow the film to obtain the fluorine-containing copolymer layer with the addition of the heat-conducting filler. The fluorine-containing copolymer l...

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Abstract

The present invention provides a back plane for a high thermal conductivity solar cell and a preparation method thereof, belonging to the field of the solar cell module technology. The preparation method comprises the steps: taking a thermal conductivity polyester film as a base; mixing fluorine-containing copolymerization resin of 40-60 parts, polymethyl methacrylate resin of 10-30 parts, thermal conductivity filling materials of 10-30 parts and flow modifiers of less than 5 parts, putting the mixture into a twin-screw extruder for melt extrusion, putting pellets into a film blowing machine or a casting machine for film casting, and obtaining a weather-proof layer; mixing the fluorine-containing copolymerization resin of 40-60 parts, polymethyl methacrylate resin of 10-30 parts, thermal conductivity filling materials of 10-30 parts and flow modifiers of less than 5 parts, and then obtaining the inner layer of the fluorine-containing copolymer layer of the thermal conductivity filling materials; and performing combination. The back plane for a high thermal conductivity solar cell has the advantages of excellent weather-proof, ageing resistant and insulating properties, anti-pollution capacity, small water vapor transmittance and outstanding heat radiation performance so as to improve the photoelectric conversion efficiency of battery pieces; and moreover, the preparation method of the back plane for the high thermal conductivity solar cell is simple in technology step and have no harsh technology factors.

Description

technical field [0001] The invention belongs to the technical field of solar cell components, and in particular relates to a back plate for a high thermal conductivity type solar cell, and also relates to a preparation method thereof. Background technique [0002] Solar cells are also called solar photovoltaic cells, and their overall structure is well known in the industry, including: a frame (usually an aluminum frame), a solar photovoltaic glass installed on the frame, and a cell (also called a silicon wafer) under the solar photovoltaic glass. Or silicon board), hot melt adhesive layer (EVA layer), junction box and backplane (backplane is also called insulating backplane). [0003] In view of the increasing scarcity of non-renewable natural resources such as oil, coal, natural gas and sea ice, and in view of the remarkable enhancement of human awareness of conservation and protection of natural resources, the inexhaustible and environmentally friendly The use of cheap r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/049H01L31/18
CPCH01L31/049H01L31/1876Y02E10/50Y02P70/50
Inventor 邵名巍
Owner CHANGSHU TOP SOLAR MATERIAL