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Solar battery rear face protection sheet

A solar cell and backside protection technology, which is applied in applications, circuits, electronic equipment, etc., can solve the problems of low power generation efficiency, low power generation efficiency, poor electrical insulation, etc., and achieve the effect of suppressing the reduction of power generation efficiency and suppressing temperature rise

Active Publication Date: 2015-02-04
TOYO ALUMINIUM KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, conventional back protection sheets for solar cells using carbon black as a black pigment have been pointed out to have poor electrical insulation and absorb light in the near-infrared and infrared regions of sunlight, resulting in damage to back protection sheets for solar cells and solar cell elements. The temperature becomes easy to rise, the power generation efficiency is low, etc.
Especially when the solar cell element is crystalline silicon, the power generation efficiency decreases at a rate of about 0.4% / °C due to temperature rise

Method used

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  • Solar battery rear face protection sheet
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Density relative to 100 parts by mass is 0.913g / cm 3 LLDPE (manufactured by Mitsui Chemicals Co., Ltd.: EVOLUE), was added with 50 parts by mass of copper phthalocyanine to prepare a Color Master Batch. Prepare the color masterbatch of quinacridone red and benzimidazolone yellow in the same way.

[0080] Density relative to 100 parts by mass is 0.922g / cm 3 LLDPE (manufactured by Mitsui Chemicals Co., Ltd.: EVOLUE), respectively add 5 parts by mass of the above-mentioned color masterbatch (copper phthalocyanine, quinacridone red, benzimidazolone yellow), and use a T-die extruder to make a film. A black LLDPE film having a thickness of 50 μm was obtained as the first resin layer.

[0081] A white PET film (manufactured by Teijin) with a thickness of 188 μm was prepared as the second resin layer, and it was bonded to the first resin layer by dry lamination using an adhesive for dry lamination to produce a black solar panel. Battery back protection sheet. The white PET ...

Embodiment 2

[0084] A transparent PET film (manufactured by Teijin) with a thickness of 250 μm was prepared as the second resin layer, and a white polyvinyl fluoride (PVF) film (Tedlar, manufactured by DuPont) with a thickness of 38 μm was prepared as the third resin layer. White PVF film contains white pigment titanium dioxide.

[0085] An adhesive for dry lamination was applied to one surface of the second resin layer, and the first resin layer (black LLDPE film with a thickness of 50 μm) in Example 1 was bonded. Furthermore, an adhesive for dry lamination was applied on the other surface of the second resin layer, and the PVF film of the third resin layer was bonded to prepare a black back surface protection sheet for solar cells.

[0086] The adhesive for dry lamination is the same as that used in Example 1.

Embodiment 3

[0088] Density relative to 100 parts by mass is 0.913g / cm 3 LLDPE (manufactured by Mitsui Chemicals Co., Ltd.: EVOLUE), was added with 50 parts by mass of copper phthalocyanine to prepare a masterbatch. Prepare the color masterbatch of quinacridone red and benzimidazolone yellow in the same way.

[0089] Similarly, the density relative to 100 parts by mass is 0.913g / cm 3 LLDPE (manufactured by Mitsui Chemicals Co., Ltd.: EVOLUE), was added with 50 parts by mass of titanium dioxide to prepare a white color masterbatch.

[0090] Density relative to 100 parts by mass is 0.922g / cm 3 LLDPE (manufactured by Mitsui Chemicals Co., Ltd.: EVOLUE), and 5 parts by mass of the above-mentioned color masterbatch (copper phthalocyanine, quinacridone red, benzimidazolone yellow) (raw materials for the first resin layer) were added respectively. In addition, the density relative to 100 parts by mass is 0.922 g / cm 3 LLDPE (manufactured by Mitsui Chemicals Co., Ltd.: EVOLUE), 20 parts by mass...

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Abstract

The present invention provides a black solar battery rear face protection sheet with which absorption of light of solar rays in near infrared and infrared regions is alleviated. The present invention, specifically, is a solar battery rear face protection sheet which is positioned in the rear face side of a solar battery cell, wherein: (1) the solar battery rear face protection sheet is formed from a stack of two or more layers; (2) the layer among the layers which configure the stack is the nearest to the rear face of the solar battery cell is black which includes two or more types of organic pigments and has an average reflectivity of 15% or less in the 380-780nm wavelength range; and (3) the solar battery rear face protection sheet has an average reflectivity of 30% or more in the 780-2000nm wavelength range.

Description

technical field [0001] This invention relates to the back surface protection sheet for solar cells arrange|positioned on the back side of a solar cell element. Background technique [0002] On the back side of a solar cell element, a back protection sheet for a solar cell is generally laminated, and these are collectively called a solar cell module. [0003] When arranging solar cell modules on the roof or deck of a building, there are cases where the back protection sheet for solar cells is required to be black in consideration of appearance or design. Therefore, in the past, as a black back protective sheet for solar cells, it has been proposed to use a black resin film added with black pigments such as carbon black, or to use a black resin film as a base resin film (for example, a polyethylene terephthalate film, etc.). ) a form in which a black coating is applied, and a form in which a black pigment such as carbon black is added to an adhesive layer bonding resin films ...

Claims

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Application Information

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IPC IPC(8): H01L31/049
CPCY02E10/52Y02B10/12H01L31/049H01L31/0481B32B7/12B32B27/08B32B27/20B32B27/304B32B27/32B32B27/322B32B27/36B32B2307/4026B32B2307/416B32B2457/12Y02E10/50Y02B10/10Y02D30/70
Inventor 前田大辅猿渡昌隆藤野刚明
Owner TOYO ALUMINIUM KK