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A kind of white eva for photovoltaic module encapsulation and its preparation method and application

A photovoltaic module packaging and photovoltaic module technology, applied in photovoltaic power generation, electrical components, semiconductor devices, etc., can solve problems such as poor compatibility, achieve simple and feasible methods, good oxidation resistance and insulation, and improve the power of components

Active Publication Date: 2020-09-11
CSI CELLS CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, glass fiber cloth and EVA are different materials, and there is a problem of poor compatibility between the two.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, the white EVA composite material for photovoltaic module encapsulation includes a white EVA layer, an inorganic water-blocking layer covering the white EVA layer, and the inorganic water-blocking layer is an inorganic film layer formed of silicon dioxide, wherein The thickness of the white EVA layer is 400 μm, and the thickness of the inorganic water blocking layer is 15 μm.

[0030] The preparation method is as follows: on one side of the white EVA layer, a layer of silicon dioxide inorganic water-blocking layer is deposited by plasma-enhanced chemical vapor deposition. During the plasma-enhanced chemical vapor deposition, the pressure is set at 135Pa and the temperature is 350°C. , the gas source molecule used is a combination of hexamethyldisiloxane and oxygen, and the deposition time is 60s to obtain the white EVA composite material for photovoltaic module encapsulation.

Embodiment 2

[0032] In this embodiment, the white EVA composite material for photovoltaic module encapsulation includes a white EVA layer, an inorganic water-blocking layer covering the white EVA layer, and the inorganic water-blocking layer is an inorganic film layer formed of silicon nitride, wherein The thickness of the white EVA layer is 200 μm, and the thickness of the inorganic water blocking layer is 10 μm.

[0033] The preparation method is as follows: on one side of the white EVA layer, a layer of silicon nitride inorganic water-blocking layer is evaporated by plasma-enhanced chemical vapor deposition. During the plasma-enhanced chemical vapor deposition, the pressure is set to 300Pa and the temperature is 200°C. , the gas source molecules used are the combination of monosilane, ammonia and nitrogen, and the deposition time is 20s to obtain the white EVA composite material for photovoltaic module encapsulation.

Embodiment 3

[0035] In this embodiment, the white EVA composite material for photovoltaic module encapsulation includes a white EVA layer, an inorganic water-blocking layer covering the white EVA layer, and the inorganic water-blocking layer is an inorganic film layer formed of silicon dioxide, wherein The thickness of the white EVA layer is 600 μm, and the thickness of the inorganic water blocking layer is 45 μm.

[0036] The preparation method is as follows: on one side of the white EVA layer, a layer of silicon dioxide inorganic water-blocking layer is deposited by plasma-enhanced chemical vapor deposition. During plasma-enhanced chemical vapor deposition, the pressure is set to 600Pa and the temperature is 350°C. , the gas source molecule used was a combination of hexamethyldisiloxane and oxygen, and the deposition time was 120s to obtain the white EVA composite material for photovoltaic module encapsulation.

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Abstract

The invention provides a white EVA composite material for photovoltaic component packaging, a method for preparing the same and an application of the same. The white EVA composite material includes awhite EVA layer and an inorganic waterproof layer covering the white EVA layer. According to the invention, the inorganic waterproof layer covering the white EVA base layer can effectively prevent exceptional appearance such as flanging and excessive glue in a component caused by great fluidity of white EVA and has no influence on light emission and scattering of white EVA, so that the component power is effectively improved. The preparing method is simple, efficient and convenient and is easy to implement and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic materials, and relates to a white EVA used for packaging photovoltaic modules and a preparation method and application thereof. Background technique [0002] In the structure of the existing solar photovoltaic modules, the solar cells are encapsulated by the EVA adhesive layer with high transparency, excellent anti-ultraviolet and aging resistance, good adhesion and elasticity, and the upper protective material (glass), the lower layer The protective material (backsheet or glass) is glued together. [0003] By laying white EVA on the back of the cell, the sunlight in the gaps of the photovoltaic cell array can be fully reflected and scattered, so that the cell can use sunlight multiple times, thereby increasing the power of the module. At present, the use of highly reflective white EVA packaging film has always been limited, mainly because of the heat and pressure during the lamination proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/048H01L31/18
CPCH01L31/048H01L31/18Y02E10/50Y02P70/50
Inventor 赵圣云
Owner CSI CELLS CO LTD