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Solar cell backboard

A technology for solar cells and backsheets, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as low adhesion, coating peeling, and high water vapor permeability

Inactive Publication Date: 2009-08-26
CYBRID TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesion between the coating and the base layer is relatively low, and it is easy to peel off from the base layer after long-term heat and humidity treatment
Moreover, the water vapor permeability is high, and the coating is prone to peeling off when the product is packaged.

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

[0032] The structure of the solar battery back sheet in this embodiment is that both sides of the base layer 1 are coated with a protective layer 2, but the protective layer 2 at the bottom layer is only a layer of fluorine-containing film 6 directly covering the base layer 1, Its material is PVF. The protective layer 2 located on the surface is composed of an adhesive layer 4 and a fluorine-containing coating 3 .

[0033] In the present embodiment, the coating formula of adhesive layer 4 is as follows (mass parts):

[0034] Hydroxyl-containing polyester binder (XK-908, manufactured by Dalian Institute of Light Industry) 100;

[0035] Curing agent N3390 (manufactured by Bayer, Germany) 5;

[0036] Curing accelerator dibutyltin dilaurate 0.5;

[0037] Anti-hydrolysis stabilizer (P200, the Stabaxol series of German Rhine Company) 0.5;

[0038] Solvent butyl acetate 15;

[0039] Silane coupling agent NCO-C 3 h 6 -Si(OCH 3 ) 3 0.5.

[0040] The ...

Embodiment 2

[0050] In this embodiment, the protective layer 2 on the surface layer and the bottom layer are both composed of an adhesive layer 4 and a fluorine-containing coating 3 . Wherein, the coating formulation of bonding layer 4 is as follows (mass parts):

[0051] Hydroxyl-containing acrylic adhesive (8723, manufactured by Nippon Synthetic Chemicals) 100;

[0052] Curing agent D201 (manufactured by Duo Naide) 5;

[0053] Curing accelerator dibutyltin dilaurate 0.5;

[0054] Anti-hydrolysis stabilizer (P200, the Stabaxol series of German Rhine Company) 0.5;

[0055] Solvent butyl acetate 15;

[0056] Silane coupling agent NCO-C 3 h 6 -Si(OCH 3 ) 3 0.5.

[0057] The manufacturing method of this embodiment is basically the same as that of Embodiment 1. After the protective layer 2 on the surface is prepared, the protective layer 2 on the bottom layer is prepared in the same way. Its structure is as attached figure 2 shown.

Embodiment 3

[0059] The difference between the present embodiment and embodiment 2 is that the coating formula of the adhesive layer 4 is as follows (mass parts):

[0060] Hydroxyl-containing polyester binder (TYA, manufactured by Shanghai Liri Technology) 100;

[0061] Curing agent V-05 (manufactured by Nisshinbo) 5;

[0062] Curing accelerator dibutyltin dilaurate 0.5;

[0063] Anti-hydrolysis stabilizer (P200, the Stabaxol series of German Rhine Company) 0.5;

[0064] Solvent butyl acetate 15;

[0065] Silane coupling agent NCO-C 3 h 6 -Si(OCH 3 ) 3 0.5.

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Abstract

The invention discloses a solar cell backboard, which comprises a base layer of an unpermeability sheet and a membranelike protective layer formed on at least one surface of the base layer. The protective layer comprises a fluorine-containing coat formed by fluorine-containing polymer paint and also comprises a bonding layer coated on the surface of the fluorine-containing coat which is opposite to the base layer. The bonding layer is formed by curing bi-component high temperature setting glue series and comprises resin matrix containing solidifiability functional group and a curing agent. The bonding layer is added between the base layer and the fluorine-containing coat for strengthening the bonding and firm degree between the base layer and the protective layer; therefore, the protective layer is difficult to be peeled off when in sealing and use, and the bonding is very reliable. Meanwhile, the fluorine-containing coat does not need to copolymerize a great of other monomers containing solidifiability functional group, thus ensuring the use effect of the protective layer.

Description

technical field [0001] The invention relates to a solar cell backboard. Background technique [0002] The solar cell back sheet (Back sheet), referred to as BS, is made of a fluorine-containing element film or coating with a service life of more than 25 years as a protective layer, and an impermeable sheet with excellent high-voltage resistance and insulation performance as the base layer (such as polythene Ethylene phthalate (PET) is compounded. Since it is necessary to package, protect and insulate the chip that can produce photoelectric conversion, so that it can maintain photoelectric conversion for a long time, the backplane is required to have high electrical insulation performance, water resistance, moisture resistance, UV resistance, acid and alkali and salt Fog, heat and cold shock resistance. It is an indispensable high-reliability key material for solar cell components, and its quality directly determines the battery life and conversion rate. [0003] In the st...

Claims

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Application Information

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IPC IPC(8): H01L31/0203B32B7/12B32B33/00H01L31/048H01L31/049
CPCY02E10/50
Inventor 张鹏张鸿宇野敬一唐超朱玲玲吴小平
Owner CYBRID TECHNOLOGIES INC
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