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Solar cell backboard

A technology of solar cells and backplanes, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as impact, production, storage, hidden dangers in use, and poor environment, and achieve reduced solvent consumption, excellent adhesion, and aging yellowing. The effect of shrinking

Active Publication Date: 2016-05-11
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

However, the raw materials used in the current general coating design are basically solvent systems
Patent CN103709953A discloses a polymer-coated film and a solar cell backsheet containing the polymer-coated film, which achieves bonding with the sealing material EVA, but due to the use of organic solvents, there are hidden dangers to production, storage and use , have adverse effects on the environment

Method used

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  • Solar cell backboard
  • Solar cell backboard
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060]

[0061]

[0062] B component:

[0063] 20 grams of water-based aliphatic polyisocyanate (Bayer Bayhydur305);

[0064] The coating solution was coated on one side of the PET substrate by a knife coating method, and dried with hot air to obtain a bonding coating with a thickness of 5 μm. A polyvinylidene fluoride film is pasted on the other side of the base material to obtain a solar battery back plate. After curing the prepared product at 40-60° C. for 3-5 days, a solar battery back sheet is obtained. Its performance can be seen in Table 1.

Embodiment 2

[0066]

[0067] B component:

[0068] Water-based aliphatic polyisocyanate (Bayer Bayhydur XP2655) 25 grams;

[0069] The coating solution was coated on one side of the PET substrate by a doctor blade coating method, and dried with hot air to obtain an adhesive coating with a thickness of 15 μm. A polyvinyl fluoride film is pasted on the other side of the substrate to obtain a solar battery back sheet. After curing the prepared product at 40-60° C. for 3-5 days, a solar battery back sheet is obtained. Its performance can be seen in Table 1.

Embodiment 3

[0071]

[0072]

[0073] B component:

[0074] 35 grams of water-based aliphatic polyisocyanate (Bayer Bayhydur XP2655).

[0075] The coating solution was coated on one side of the PET substrate by a knife coating method, and dried with hot air to obtain a bonding coating with a thickness of 20 μm. A polyvinyl fluoride film is pasted on the other side of the substrate to obtain a solar battery back sheet. After curing the prepared product at 40-60° C. for 3-5 days, a solar battery back sheet is obtained. Its performance can be seen in Table 1.

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Abstract

The invention relates to a solar cell backboard, which comprises a substrate material, a weather-proof layer and a bonded coating, wherein the bonded coating is a waterborne coating; and waterborne polyester resin of which the glass transition temperature is 40-77 DEG C and the hydroxyl value is 5-17KOH mg / g is utilized. The solar cell backboard reduces the solvent amount and is friendly to environment; the obtained bonded coating and a sealing material EVA have excellent bonding performance; the coating still has excellent adhesive force to a substrate after being hygrothermally aged; yellowing on ageing is small; and the requirements of encapsulated insulation of the solar cell backboard can be completely met.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a solar cell backboard. Background technique [0002] As a green alternative to traditional methods of electricity production, photovoltaic cell modules are used to generate electricity from the sun. Photovoltaic modules are assembled from various semiconductor element systems and must be protected to reduce the impact and damage of environmental effects such as moisture, oxygen and ultraviolet rays. Photovoltaic cell modules are generally made of glass, battery silicon wafers, EVA, and backsheet materials by hot pressing. Therefore, backsheets with excellent electrical insulation, interlayer bonding strength, weather resistance, UV resistance, and moisture resistance are used in Photovoltaic modules play an important protective role. [0003] The backsheet generally consists of a base material, a weather-resistant layer, and an adhesive layer. The traditional b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/049
CPCY02E10/50H01L31/049H01L31/0481
Inventor 刘丽英胡亚召陈路张振华张学建
Owner 乐凯胶片股份有限公司