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Method for preparing solar cell back film

A technology for solar cells and panel back films, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor corona resistance, reduced insulation resistance and aging resistance of back films, solar panel failures, etc. Improve the utilization rate, good aging resistance, and improve the effect of photoelectric conversion efficiency

Inactive Publication Date: 2019-04-05
江苏中宇光伏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The back film currently on the market, such as PET thick film, has poor corona resistance, which reduces the insulation resistance and aging resistance of the back film, and easily causes solar panels to fail.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a back film of a solar cell panel, comprising a weather-resistant layer, a PET layer and an adhesive layer sequentially from the inside to the outside, the thickness of the weather-resistant layer is 30 μm, and consists of the following components in parts by mass: epoxy resin 50 parts, 4 parts of the first curing agent, 10 parts of inorganic filler and 12 parts of the first diluent;

[0023] The adhesive layer has a thickness of 20 μm and is composed of the following components in parts by mass: 40 parts of epoxy resin, 8 parts of silicone resin, 8 parts of second curing agent, 6 parts of silane coupling agent and the second dilution 16 doses.

[0024] Specifically, the inorganic filler is a mixture of magnesium fluoride and talc powder, the composition ratio of magnesium fluoride and talc powder is 4:3, and the inorganic filler is ground to 200 mesh.

[0025] Specifically, the first curing agent is a polyisocyanate curing agent, and the second ...

Embodiment 2

[0035] A method for preparing a back film of a solar cell panel, comprising a weather-resistant layer, a PET layer and an adhesive layer sequentially from the inside to the outside, the thickness of the weather-resistant layer is 60 μm, and consists of the following components in parts by mass: epoxy resin 70 parts, 10 parts of the first curing agent, 18 parts of inorganic filler and 20 parts of the first diluent;

[0036] The adhesive layer has a thickness of 50 μm and is composed of the following components in parts by mass: 50 parts of epoxy resin, 20 parts of silicone resin, 12 parts of second curing agent, 10 parts of silane coupling agent and the second dilution 26 doses.

[0037] Specifically, the inorganic filler is a mixture of magnesium fluoride and talc powder, the composition ratio of magnesium fluoride and talc powder is 4:3, and the inorganic filler is ground to 200 mesh.

[0038] Specifically, the first curing agent is a polyisocyanate curing agent, and the sec...

Embodiment 3

[0048] A preparation method for a back film of a solar cell panel, comprising a weather-resistant layer, a PET layer and an adhesive layer sequentially from the inside to the outside, the thickness of the weather-resistant layer is 40 μm, and consists of the following components in parts by mass: epoxy resin 55 parts, 6 parts of the first curing agent, 12 parts of inorganic filler and 15 parts of the first diluent;

[0049] The adhesive layer has a thickness of 30 μm and is composed of the following components in parts by mass: 42 parts of epoxy resin, 10 parts of silicone resin, 9 parts of second curing agent, 7 parts of silane coupling agent and the second dilution 18 doses.

[0050] Specifically, the inorganic filler is a mixture of magnesium fluoride and talc powder, the composition ratio of magnesium fluoride and talc powder is 4:3, and the inorganic filler is ground to 200 mesh.

[0051] Specifically, the first curing agent is a polyisocyanate curing agent, and the seco...

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Abstract

The invention discloses a method for preparing a solar cell back film. A weather resistant layer, a PET layer and a bonding layer are arranged in order from inside to outside. The thickness of the weather resistant layer is 30-60 [Mu]m, and the weather resistant layer is composed by the following compositions in parts by mass: 50-70 parts of epoxy resin, 4-10 parts of first curing agent, 10-18 parts of inorganic filler and 12-20 parts of first diluent; and the thickness of the bonding layer is 20 to 50 [Mu]m, and the bonding layer is composed by the following compositions in parts by mass: 40-50 parts of epoxy resin, 8-20 parts of silicone resin, 8-12 parts of second curing agent, 6-10 parts of silane coupling agent and 16-26 of second diluent. The inorganic filler is a mixture of magnesium fluoride and talc, the component ratio of the magnesium fluoride and the talc is 4:3, the inorganic filler is ground to 200 mesh, the first curing agent is polyisocyanates curing agent, the second curing agent is a polyamide curing agent. The method for preparing a solar cell back film has weather resistance and acid and alkali resistance, and is suitable for popularization and popularization ina wide range.

Description

technical field [0001] The invention belongs to the technical field of back film preparation, and in particular relates to a preparation method of a back film of a solar battery panel. Background technique [0002] Solar cell module packaging materials mainly include glass, back film (fluorine film, PET thick film, EVA film), silica gel, frame and junction box, etc. The current commercial crystalline silicon solar cell module has a service life requirement of 25 years, and the back film, as a photovoltaic packaging material directly in contact with the external environment on a large area, should have good weather resistance (high temperature resistance, UV resistance, aging resistance), Insulation resistance, impact resistance and water vapor barrier properties are used to ensure the reliability, stability and durability of solar cells. The back film currently on the market, such as PET thick film, has poor corona resistance, which reduces the insulation resistance and agi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/049
CPCH01L31/049H01L31/18Y02E10/50
Inventor 皇韶峰
Owner 江苏中宇光伏科技有限公司
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