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Solar cell module and method for manufacturing same

A solar cell and module technology, applied in electrical components, circuits, photovoltaic power generation, etc., can solve problems such as PID

Inactive Publication Date: 2015-11-18
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, there is a problem that PID may occur during long-term use in large-scale power generation systems using crystalline silicon solar cells as the voltage becomes higher.

Method used

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  • Solar cell module and method for manufacturing same
  • Solar cell module and method for manufacturing same
  • Solar cell module and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0123] Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. The present invention is not limited to these examples. In the following examples and comparative examples, parts and % are based on weight unless otherwise specified.

[0124] The measuring method of the characteristic is shown below.

[0125] (1) Volume resistivity

[0126] The transparent resin and the heat-crosslinked sealing material were made into test pieces with a thickness of 0.9 to 1.2 mm, and the values ​​at 25° C. were measured in accordance with JISC2139.

[0127] (2) PID test

[0128] A layer made of transparent resin and a sealing material layer mainly composed of ethylene-vinyl acetate copolymer were integrally laminated and fixed on the surface transparent glass (whiteboard glass or soda glass with a thickness of 3 mm), and embedded in the Crystalline silicon solar cell elements in the encapsulant and solar cell modules in the bac...

reference example 1

[0132] (sheet of modified polyethylene)

[0133] 1.5 parts of vinyltrimethoxysilane and 2,5- 0.15 parts of dimethyl-2,5-bis(t-butylperoxy)hexane were mixed. The mixture was extruded into strands while kneading using a twin-screw extruder (product name "TEM37B", manufactured by Toshiba Machine Co., Ltd.) under the conditions of a resin temperature of 200° C. and a residence time of the resin of 80 to 90 seconds. After natural cooling, it was finely cut with a pelletizer to obtain 97 parts of pellets of modified polyethylene (PE-S).

[0134] In the FT-IR spectrum of the pellets, at 1075, 808, 766 cm with those originating from vinyltrimethoxysilane -1 different positions at 1090cm -1 observed that originating from Si-OCH 3 The new absorption band of the base, and at 825, 739cm -1 observed that originating from Si-CH 2 The new absorption band of the base. From this, it was confirmed that the obtained modified polyethylene (PE-S) had a methoxysilyl group.

[0135] 2-(2H-be...

reference example 2

[0139] (Modified ethylene-α-olefin copolymer sheet)

[0140] Using pellets of a commercially available ethylene-octene copolymer (product name "Affinity (registered trademark) PL1880", melting point 100°C, manufactured by Dow Chemical Japan Co., Ltd.), the resin temperature was 190°C, and the residence time was 170 to 180 seconds. Otherwise, kneading was carried out in the same manner as in Reference Example 1 to obtain 90 parts of pellets of a modified ethylene-1-octene copolymer (EOC-S).

[0141] In the FT-IR spectrum of the pellets, at 1075, 808, 766 cm with those originating from vinyltrimethoxysilane -1 different positions at 1090cm -1 observed that originating from Si-OCH 3 The new absorption band of the base, and at 825, 739cm -1 observed that originating from Si-CH 2 The new absorption band of the base. From this, it was confirmed that the obtained modified ethylene-1-octene copolymer (EOC-S) had a methoxysilyl group.

[0142] Using the pellets of the obtained mo...

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Abstract

Provided is a solar cell module which is obtained by laminating, from the light receiving surface side, at least a surface transparent glass plate, a sealing material layer that is mainly composed of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 20-35% by weight, a crystalline silicon solar cell element that is buried in the sealing material, and a back surface protection layer that is formed of a resin sheet or glass. This solar cell module is capable of suppressing the occurrence of PID even in cases where a sealing material that uses a common ethylene-vinyl acetate copolymer is used between the surface transparent glass plate and the sealing material layer.

Description

technical field [0001] The present invention relates to a solar cell module and a manufacturing method thereof. More specifically, it relates to a solar cell module that uses a crystalline silicon element and is less prone to potential induced degradation (Potential Induced Degradation, hereinafter also abbreviated as "PID") and a method for manufacturing the same. Background technique [0002] Solar power generation has attracted attention as a clean energy source, and in recent years, large-scale power generation systems such as MegaSolar (large-scale solar power plant) using solar cells have been developed. In large-scale power generation systems, in order to reduce transmission loss, the system voltage has been increased to 600-1000V. On the other hand, there is a problem that PID may occur during long-term use in large-scale power generation systems using crystalline silicon solar cells as the voltage becomes higher. [0003] Crystalline silicon solar cell modules usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042
CPCH01L31/0481Y02E10/50H01L31/049H01L31/0488Y02E10/546Y02E10/547H01L31/028H01L31/036H01L31/03682
Inventor 小出洋平千叶大道小原祯二
Owner ZEON CORP