Novel solar battery backboard

A technology for solar cells and backsheets, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of unstable interlayer bonding performance, unstable composite film size, unstable product performance, etc., to improve weather resistance and Anti-ultraviolet ability, novel structure and low cost

Active Publication Date: 2012-11-07
ZHEJIANG GREEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material of the present invention is easy to obtain, and the cost is greatly reduced. The disadvantage is that the structure is complex, the product performance is unstable, and the preparation process is cumbersome.
The solar battery back sheet of the invention has only a three-layer structure, no adhesive layer is needed, the preparation process is simple, and the steps of gluing and hot pressing are omitted. The disadvantages are that the interlayer bonding performance is unstable, the thickness is difficult to control, and Differences in shrinkage between layers can lead to dimensional instability of the composite film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The solar battery backsheet includes a weather-resistant layer, an adhesive layer, and an insulating layer, wherein the insulating layer and the weather-resistant layer are combined through an adhesive layer.

[0052] Weather-resistant layer: the thickness is 10um, and its composition is as follows: 80 parts of polyvinylidene fluoride, 5 parts of polymethyl methacrylate, 5 parts of titanium dioxide, and 10 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer (by weight, ethylene accounts for 40%, vinyl acetate accounts for 60%, and the graft ratio of maleic anhydride is 1.5%).

[0053] Insulating layer: the thickness is 200um, and its composition is as follows in parts by weight: 85 parts of polyethylene terephthalate, 10 parts of polytetrafluoroethylene micropowder, and 5 parts of glass microspheres;

[0054] Adhesive layer: an ethylene-vinyl acetate copolymer adhesive with a thickness of 10 um, the composition of which is as follows in parts by weight: e...

Embodiment 2

[0056] The solar battery backsheet includes a weather-resistant layer, an adhesive layer, and an insulating layer, wherein the insulating layer and the weather-resistant layer are combined through an adhesive layer.

[0057] Weather-resistant layer: the thickness is 40um, and its composition is as follows in parts by weight: 70 parts of ethylene-tetrafluoroethylene copolymer (ETFE), 10 parts of polymethyl methacrylate, 5 parts of barium sulfate, maleic anhydride grafted ethylene- 15 parts of vinyl acetate copolymer (by weight, ethylene accounts for 40%, vinyl acetate accounts for 60%, and the graft ratio of maleic anhydride is 1.5%).

[0058] Insulating layer: the thickness is 250um, and its composition is as follows in parts by weight: 90 parts of polyethylene terephthalate, 5 parts of polytetrafluoroethylene micropowder, and 5 parts of titanium dioxide.

[0059] Adhesive layer: epoxy resin adhesive with a thickness of 30um.

Embodiment 3

[0061] The solar battery backsheet includes a weather-resistant layer, an adhesive layer, and an insulating layer, wherein the insulating layer and the weather-resistant layer are combined through an adhesive layer.

[0062] Weather-resistant layer: the thickness is 20um, and its composition is as follows in parts by weight: 65 parts of vinylidene fluoride-hexafluoropropylene copolymer, 20 parts of polyethyl methacrylate, 8 parts of titanium dioxide, maleic anhydride grafted ethylene-vinyl acetate 7 parts of ester copolymers (by weight, ethylene accounts for 40%, vinyl acetate accounts for 60%, and the graft ratio of maleic anhydride is 1.5%).

[0063] Insulating layer: the thickness is 270um, and its composition is as follows in parts by weight: 75 parts of polyethylene terephthalate, 15 parts of polytetrafluoroethylene micropowder, and 10 parts of glass microspheres.

[0064] Adhesive layer: an ethylene-vinyl acetate copolymer adhesive with a thickness of 20um, the compositi...

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Abstract

The invention relates to a novel solar battery backboard. The novel solar battery backboard comprises a weather resistant layer, a bonding layer and an insulation layer bonded in sequence, wherein the weather resistant layer consists of the following components by weight: 40-80 parts of fluorine-containing polymer, 5-30 parts of acrylic acid polymer, 5-20 parts of inorganic filler and 5-15 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer; and the insulation layer consists of the following components by weight: 70-90 parts of polyethylene glycol terephthalate, 1-20 parts of polytetrafluoroethylene micro-powder and 5-20 parts of uvioresistant additive. The novel solar battery backboard is novel in structure, easily available in material and low in cost; and the interlayer bonding strength is enhanced, the weather resistance is improved and the service life of a solar assembly is prolonged.

Description

technical field [0001] The invention relates to the technical field of solar photovoltaic cells, in particular to a novel solar cell backboard. Background technique [0002] Solar cell back sheet is also called solar cell back sheet film, photovoltaic back sheet, photovoltaic back sheet film, solar back sheet. The solar cell backsheet is a component widely used in solar cells (photovoltaics), located on the back of the solar cell panel, it protects and supports the cells, and has reliable insulation, water resistance, and aging resistance. There are two types of backsheet film: one is coated backsheet film, which is coated with fluororesin on both sides of polyethylene terephthalate (PET) polyester film, and then dried and cured to form a film. One is the glue-coated composite backsheet film, which is laminated with fluorine film or EVA film on both sides of the PET polyester film, and the three layers of film are bonded with a suitable adhesive. The common structures are T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08C08L27/12C08L33/00C08L51/06C08L67/02C08L27/18C08K3/34C08K3/40C08K3/30C08K3/22H01L31/048H01L31/049
CPCY02E10/50
Inventor 徐洪徐诚王海连胡松林张宏谢根发
Owner ZHEJIANG GREEN NEW MATERIALS
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