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Laminate for solar cell and solar cell module produced using same

一种太阳能电池、多层体的技术，应用在应用、电路、电子器材等方向，能够解决作业环境及制造装置不良影响、防湿性水蒸气阻隔性不充分、太阳能电池电路腐蚀等问题，达到透明性优良、省略透明性、提高生产率的效果

Inactive Publication Date: 2013-07-31
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when using an EVA sheet to manufacture a solar cell module, depending on various conditions such as heating and pressing, there are problems that acetic acid gas is generated due to thermal decomposition of EVA, which adversely affects the working environment and manufacturing equipment, or that solar cell damage occurs. Corrosion of the circuit, peeling at the interface of solar cell elements, front sheet, back sheet, etc.
[0006] Furthermore, the moisture resistance of EVA, specifically, the water vapor barrier property is insufficient (for example, the water vapor transmission rate at a thickness of 0.3mm, a temperature of 40°C, and a relative humidity of 90% is 25 to 35g / (m 2 24 hours), when used in an environment with high humidity, moisture may reach the solar cell element, causing deterioration of the solar cell and a decrease in power generation efficiency

Method used

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  • Laminate for solar cell and solar cell module produced using same
  • Laminate for solar cell and solar cell module produced using same
  • Laminate for solar cell and solar cell module produced using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9、 comparative example 1～4

[0199] (Examples 1-9, Comparative Examples 1-4, Reference Example 1)

[0200] Using a dynamic viscoelasticity tester (manufactured by IT Kesek Co., Ltd., trade name: Viscoelasticity Tester DVA-200), under the conditions of vibration frequency: 10 Hz, heating rate: 3°C / min, and strain 0.1%, auto- The storage modulus (E') was measured at 100°C, and the storage modulus (E') at 20°C was read from the obtained data. Those whose storage elastic modulus (E') at 20° C. was 100 MPa to 1000 MPa were rated as pass (◯), and the others were rated as (×).

Embodiment 11～19、 comparative example 5～7）

[0202] Using a dynamic viscoelasticity measuring machine manufactured by IT Measurement Co., Ltd., trade name "Viscoelasticity Measuring Instrument DVA-200", the sample (length: 4 mm, width: 60 mm) was subjected to a vibration frequency of 10 Hz, a strain of 0.1%, and a heating rate of 3 °C. Under the condition of 25 mm between chucks per minute, the transverse direction was measured from -150°C to 150°C, and the storage modulus (E') (MPa) at 20°C was obtained from the obtained data. The results were recorded, and the results of evaluations based on the following criteria were also recorded.

[0203] (◎) The storage modulus (E') at 20°C is 300MPa~700MPa

[0204] (○) The storage modulus (E') at 20°C is 100 MPa or more and less than 300 MPa, or more than 700 MPa and 1000 MPa or less

[0205] (×) The storage modulus (E') at 20°C is greater than 1000MPa

[0206] (9) Sealing

[0207] Using a vacuum laminator (manufactured by NPC Co., Ltd., trade name: LM30×30), temperature on a ...

Embodiment 1）

[0245] After dry mixing (A)-1, (B)-1 and (G)-1 at a mixing mass ratio of 94.5:5:0.5, using a φ40mm co-rotating twin-screw extruder, two types of three-layer A manifold-type nozzle extrudes at a set temperature of 190 to 200° C. as the resin layer (I) serving as both outer layers. Also, dry-mix (C)-1 and (D)-1 at the same time at a mixing mass ratio of 99.9:0.1, and use a φ40mm co-rotating twin-screw extruder from the same nozzle as the resin layer to become the middle layer (II ) Extrude at a set temperature of 200-220°C. At this time, the discharge amount of molten resin was adjusted so that the thickness of each layer was 0.1 / 0.1 / 0.1 (mm) of resin layer (I) / resin layer (II) / resin layer (I). Next, the coextruded sheet was quenched with a casting roll at about 20° C. to obtain a multilayer sheet with a thickness of 0.3 mm. The obtained multilayer sheet was evaluated for transparency, water vapor transmission rate, and heat resistance. The results are shown in Table 1.

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Abstract

Provided is a laminate for a solar cell module that makes formation of the solar cell module easy, can eliminate crosslinking processes and exhibits superior transparency, moisture-proofing properties, sealing properties, handling properties (rigidity), and the like. Also provided is a solar cell module produced using the laminate. The laminate for a solar cell has at least one layer of a resin layer ((I)-1) or a resin layer ((I)-2), which is as an outermost layer, and has an ethylene-based polymer (C) satisfying specific conditions and a resin layer (II) containing a crystal nucleating agent (D). The resin layer ((I)-1) contains an ethylene-a-olefin random copolymer (A) satisfying specific conditions and an ethylene-a-olefin block copolymer (B) satisfying specific conditions. The resin layer ((I)-2) contains a silane-modified ethylene-based resin (X).

Description

technical field [0001] The present invention relates to a solar cell multilayer body that has excellent moisture resistance, transparency, and heat resistance, and can impart excellent sealing properties and handleability during solar cell module production. Background technique [0002] In recent years, awareness of environmental issues such as global warming has been increasing, and photovoltaic power generation is expected to be clean and non-polluting in particular. A solar cell is a central component of a photovoltaic power generation system that directly converts the energy of sunlight into electricity. As its structure, generally, a plurality of solar cell elements (cells) are wired in series or in parallel, and various packages are performed to protect the cells to form a cell. The unit to be assembled into this package is called a solar cell module, and it is generally formed as follows: the surface irradiated by the sun is covered with a transparent substrate (fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042B32B27/32C08L23/08C08L53/00
CPCH01L31/0481B32B2307/7246B32B27/08H01L31/0487B32B2307/704B32B2307/544B32B27/18B32B2307/7265B32B2457/12B32B2307/412Y02E10/50C08L23/0815B32B27/32C08L2314/06Y02B10/12C08L53/00Y02B10/10C08L23/08H01L31/042
Inventor 谷口浩一郎田中一也
Owner DAI NIPPON PRINTING CO LTD