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solar cell module

A solar cell and photoelectric conversion technology, applied to photovoltaic modules, photovoltaic module support structures, circuits, etc., can solve the problems of suppressing the decline of insulation resistance and sheet wrinkling, and achieve the goal of suppressing the reduction of insulation resistance and low cost Effect

Inactive Publication Date: 2011-11-30
FUJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the case of using a sheet, there is a problem that wrinkles are generated due to thermal expansion of the sheet, resulting in a decrease in the effect of suppressing a decrease in insulation resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A polyimide having a thickness of about 50 μm was used as the substrate of the photoelectric conversion element. Ag electrodes (200nm thick), two pin junctions (a-Si / a-SiGe series junction, 800nm ​​thick) as photoelectric conversion layers, and ITO (70nm thick) as transparent electrodes were formed on the upper surface of the substrate. An Ag electrode (300 nm) was formed as a connection electrode on the lower surface of the substrate. In addition, a glass nonwoven fabric having a thickness of 0.2 mm was used as the insulating sheet, and EVA having a thickness of 0.3 mm×a width of 300 mm and an MFR (melt mass flow rate) of 30 g / min was used. Fluorine-based thin film ETFE is used for the protective parts. As reinforcement parts, coated steel sheets made of polyester resin are used. The size of the photoelectric conversion element was 400 mm wide x 200 mm deep, the steel plate was 450 mm wide x 300 mm deep, and the glass nonwoven fabric was 220 mm wide x 20 mm wide x 0....

Embodiment 2

[0085] The photoelectric conversion element, sealing member, and protective member were configured in the same manner as in Example 1. The insulating sheet between the photoelectric conversion element and the protective member uses ETFE with a thickness of 25 μm. It is arranged between the photoelectric conversion element and the sealing member so that the centers in the short side direction (width direction) coincide. In addition, between the insulating sheet and the photoelectric conversion element, EVA having a thickness of 0.3 mm was provided as a sealing member. Lamination was carried out under the same conditions as in Example 1.

[0086] Table 1 shows the results of insulation resistance evaluation performed in the same manner as in Example 1. As in Example 1, high insulation was obtained both before and after the high-temperature and high-humidity test.

Embodiment 3

[0088] The photoelectric conversion element, sealing member, and protective member were configured in the same manner as in Example 1. The insulating sheet between the photoelectric conversion element and the protective member uses ETFE with a thickness of 25 μm. It is arranged between the EVA on the side opposite to the light irradiation and the steel plate so that the center in the short side direction (width direction) coincides. In addition, in order to fix the insulating sheet, a modified silicon adhesive is used between the insulating sheet and the steel plate. Lamination was carried out under the same conditions as in Example 1.

[0089] Table 1 shows the results of insulation resistance evaluation performed in the same manner as in Example 1. As in Examples 1 and 2, high insulation was obtained both before and after the high-temperature and high-humidity test.

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Abstract

The present invention provides a solar cell module capable of reducing a drop in insulation resistance. The constituted solar cell module includes: a photoelectric conversion element (103) including a substrate (107) and a photoelectric conversion layer (109) formed on the substrate (107); The element (103) is bonded to protect the protective part (101) of the light incident surface of the solar cell module; the reinforcing part ( 102); and an insulating sheet (104) arranged between the photoelectric conversion element (103) and the reinforcing member (102) for insulating the photoelectric conversion element (103).

Description

technical field [0001] The present invention relates to a solar cell module excellent in insulation and weather resistance. Background technique [0002] In recent years, it has been predicted that global warming will be caused by the greenhouse effect accompanying the increase of carbon dioxide, and solar cells have attracted attention as a clean energy source that does not emit carbon dioxide. There are crystalline solar cells, amorphous solar cells, and compound semiconductor solar cells among solar cells, and various types of solar cells are being researched and developed. Among these, although the energy conversion efficiency of amorphous silicon solar cells is not as good as that of crystalline solar cells, it has excellent characteristics that other solar cells do not have, such as easy large-scale area, large light absorption coefficient, and ability to operate as a thin film, and is expected to be large in the future. have a future. [0003] A widely used form of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042
CPCY02E10/50H01L31/042Y02B10/12H01L31/048H02S20/23Y02B10/10
Inventor 和田雄人
Owner FUJI ELECTRIC CO LTD