Seal film for solar cell module and solar cell module utilizing the same

A technology of solar cells and sealing films, which is applied in household seals, applications, circuits, etc., can solve the problems of electrical insulation of sealing films, lower gas barrier properties, and lower gas barrier properties of gas barrier layers, and improve output power reduction , Good balance of heat resistance, and the effect of suppressing changes over time

Inactive Publication Date: 2011-04-13
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, the conventional sealing films of the above (1) to (6) have the following problems, and their application to solar cell module sealing films cannot be sufficiently promoted.
[0016] For example, in the above item (1), aluminum foil is used as the gas barrier layer, which is good in terms of gas barrier properties, but has problems in terms of electrical insulation of the sealing film, and also has problems in terms of weight reduction.
[0017] In addition, the sealing film of the above item (2) uses a fluorine-based film as the base film, which has excellent weather resistance and hydrolysis resistance, and less variation in gas barrier properties. However, due to the low mechanical strength of the fluorine-based film (easy to broken), so the effect of enhancing the mechanical strength of the solar cell module is low, and the solar cell element may be damaged
In addition, workability such as joining is also poor
[0018] In addition, since the sealing films of the above (3) and the above (4) use a hydrolysis-resistant PET film, it is possible to prevent the film from deteriorating due to hydrolysis. The problem that the output power of the solar cell module decreases
In addition, in environments with high temperature, high humidity, and special harmful gases such as hot spring areas or sewer facilities, the degradation due to heat resistance, hydrolysis degradation, and harmful gases generated may advance in a short period of time, and the life of the solar cell module may drop sharply. question
[0019] In addition, the sealing film of the above item (5) has a biaxially oriented PPS film laminated on the outermost layer of the sealing film, so it has the ability to prevent the external environment from being exposed to high temperature, high humidity, chemicals and harmful gases. The effect of deterioration of the sealing film, but, like the sealing films of the above items (3) and (4), due to long-term use, the gas barrier property of the gas barrier layer decreases, so the output power of the solar cell module will be reduced. Decrease, there is no reliability for a longer life of 20 to 30 years

Method used

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  • Seal film for solar cell module and solar cell module utilizing the same
  • Seal film for solar cell module and solar cell module utilizing the same
  • Seal film for solar cell module and solar cell module utilizing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0196] (1) Aggregation of PPS

[0197] Add 32 kg (250 mol, including 40% by mass of crystal water) of sodium sulfide, 100 g of sodium hydroxide, 36.1 kg (250 mol) of sodium benzoate, and 79.2 kg of N-methyl-2-pyrrolidone (hereinafter referred to as NMP) into the autoclave , while stirring, the temperature was slowly raised to 205° C., and 7.0 liters of distilled liquid containing 6.9 kg of water were removed. 37.5 kg (255 mol) and 20 kg of NMP were added to the remaining mixture, and it polymerized at 250 degreeC for 5 hours. The obtained reaction product was alternately washed 8 times with hot water using ion-exchanged water and NMP, and dried at 80° C. for 24 hours with a vacuum dryer. The melt viscosity of the obtained PPS powder polymer was 4100 poise, the glass transition temperature was 90°C, and the melting point was 285°C.

[0198] (2) Preparation of PPS resin composition

[0199] After adding 1% calcium carbonate powder with an average particle diameter of 1 μm to ...

Embodiment 2

[0217] A PPS film was produced by the same method as in Example 1, and the heat treatment temperature after stretching was set to 260°C, and the post-annealing temperature was set to 150°C. The thus obtained film having a thickness of 25 μm was designated as PPS-F-2. The orientation degree OF of this film was 0.39 in the edge direction and 0.42 in the terminal direction.

[0218] On the other hand, the PET film was manufactured in the same manner as PET-F-1 of Example 1, and the post-annealing temperature was set to 150°C. The obtained film with a thickness of 100 μm was designated as PET-F-2. The above-mentioned PPS-F-2 and PET-F-2 were laminated into a three-layer structure of PPS-F-2 / PET-F-2 / PPS-F-2 by the method of Example 1 to form a resin film layer. Then, a gas barrier layer-1 was laminated on one surface of the resin film layer by the same method as in Example 1 to obtain a sealing film (as sealing film-2). The water vapor transmission rate of the film is 0.5g / m 2 ...

Embodiment 3

[0220] A PPS film was prepared by the method of Example 1, the heat treatment temperature was set to 260° C., and the relaxation rate in the width direction in the same tenter was set to 12%. The degree of orientation OF of this film was 0.32 in the edge direction and 0.36 in the terminal direction. In addition, the post-annealing treatment was performed using the method of Example 1 at a temperature of 150° C. for one minute. The obtained film with a thickness of 25 μm was designated as PPS-F-3. On the other hand, the stretch ratio of the PET film in the longitudinal direction and the width direction was set to 3.5 times, and the heat treatment conditions and post-annealing treatment were carried out under the conditions of Example 1 to obtain a PET film with a thickness of 100 μm. This film was called PET-F-3.

[0221] The PPS-F-3 and PET-F-1 were laminated in three layers under the same lamination structure and conditions as in Example 1, and then the gas barrier layer-1 ...

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Abstract

PPS film excelling in heat resistance and hydrolysis resistance is used in at least a portion of a seal film for solar cell to thereby not only reinforce the seal film in deterioration by external environment but also inhibit deterioration of the gas barrier property thereof by long-term use having been a problem of the prior art so as to attain environment resisting properties (resistances to heat, hydrolysis, weather, chemical, etc.) of good balance, realizing a seal film markedly excelling in long-term reliability. Further, there is provided a solar cell module utilizing the seal film. Theseal film for solar cell module is one comprising a resin film layer having a layer of biaxially oriented film consisting of a resin composition composed mainly of poly-p-phenylene sulfide and comprising a gas barrier layer constituted of at least one member selected from the group consisting of a metal, a metal oxide, an inorganic compound and an organic compound, wherein the longitudinal and width direction heat shrink ratios at 150 DEG C of the seal film for solar cell module both fall within the range of -2.0% to +2.0%, and wherein the absolute value of any difference between the longitudinal and width direction heat shrink ratios at 150 DEG C is 2.0% or below.

Description

technical field [0001] The present invention relates to a sealing film for a solar cell module having a gas barrier layer, and a solar cell module using the sealing film. [0002] In more detail, it relates to a sealing film for a solar cell module having significantly improved durability of a gas barrier layer, greatly improving weather resistance such as hydrolysis resistance and ultraviolet resistance, and excellent long-term reliability, and a solar cell using the sealing film module. Background technique [0003] In recent years, solar cells have attracted attention as a next-generation energy source, and have been widely used in residential and industrial fields. [0004] With the gradual increase in the penetration rate of solar cells, in particular, the demand for a long-term life of 20 to 30 years (reliability in long-term use) of solar cells is gradually increasing. [0005] In particular, for the purpose of imparting long-term reliability (long-term durability) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/00H01L31/042
CPCB32B27/06Y02E10/50B32B17/10788H01L31/048B32B17/10018B32B7/12B32B27/08B32B27/18B32B27/28B32B27/286B32B27/30B32B27/304B32B27/308B32B27/32B32B27/322B32B27/34B32B27/36B32B2250/24B32B2255/10B32B2255/20B32B2255/26B32B2255/28B32B2307/206B32B2307/306B32B2307/308B32B2307/402B32B2307/412B32B2307/50B32B2307/518B32B2307/558B32B2307/71B32B2307/712B32B2307/714B32B2307/718B32B2307/7244B32B2307/7246B32B2307/734B32B2457/12B32B2581/00H01L31/049B32B27/00
Inventor 宫治新一郎野口昌和川治直树
Owner TORAY IND INC
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