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Solar cell backboard with excellent weathering resistance and preparation method thereof

A solar cell and battery backplane technology, which is applied in the direction of climate sustainability, chemical instruments and methods, circuits, etc., can solve problems affecting the performance of the backplane, achieve excellent bonding strength, excellent weather resistance, and reduce costs

Inactive Publication Date: 2012-08-15
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The backplane prepared by this method generally has defects such as micropores, which seriously affect the performance of the backplane.

Method used

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  • Solar cell backboard with excellent weathering resistance and preparation method thereof
  • Solar cell backboard with excellent weathering resistance and preparation method thereof

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preparation example Construction

[0026] The preparation method of the solar cell backboard of the present invention comprises the following steps:

[0027] a. Using double-layer co-extrusion method, PVDF resin and polyacrylic acid resin are extruded at a working temperature of 180-230°C to prepare the F-containing composite film;

[0028] B, carry out pretreatment with described F-containing composite film, PET film, transition layer;

[0029] c. Coating glue on one side of the PET film, drying it at 60-120°C, and then pressing it with the F-containing composite film;

[0030] d. Coating glue on the surface of the other side of the PET film, drying it at 60-120° C., and then pressing it with the transition layer, thereby preparing a solar battery back sheet with excellent weather resistance.

[0031] Wherein, the pressing in step c is at a temperature of 80-100°C and a temperature of 5-25Kg / cm 2 Pressing under a certain pressure, and then baking at a temperature of 50-100°C for 6-48 hours; the pressing in s...

Embodiment 1

[0034] 1. Preparation of materials:

[0035] Prepare PVDF resin and polyacrylic resin, PET film with a thickness of 0.125mm, polyurethane glue, and EVA film with a thickness of 0.05mm.

[0036] 2. Preparation of the backplate:

[0037](1) Using a double-layer co-extrusion method, PVDF resin and polyacrylic acid resin were extruded at a working temperature of 230 ° C to prepare a F-containing composite film with a thickness of 0.03 mm. The PVDF layer thickness is 0.015mm.

[0038] (2) Pretreat the PET film; the surface energy of the film after treatment is 48 dynes.

[0039] (3) Coat the glue on the surface of the PET film with a coating thickness of 40 microns, then dry it at 60°C, and then press it with the F-containing composite film at a certain temperature and pressure; the pressure temperature is 80°C, and the pressure is 25Kg / cm 2 , and then baked at 50°C for 48 hours.

[0040] (4) Coat glue on the other surface of the PET film with a coating thickness of 40 micr...

Embodiment 2

[0045] 1. Preparation of materials:

[0046] Prepare PVDF resin and polyacrylic resin, PET film with a thickness of 0.3mm, polyurethane glue, and EVA film with a thickness of 0.02mm.

[0047] 2. Preparation of the backplate:

[0048] (1) Extrude PVDF resin and polyacrylic acid resin at a working temperature of 200°C by double-layer co-extrusion to prepare a F-containing composite film with a thickness of 0.05mm, in which the thickness of the PVDF layer is 0.008mm;

[0049] (2) Pretreat the PET film; the surface energy of the film after treatment is 52 dynes;

[0050] (3) Coat glue on one side of the PET film with a coating thickness of 50 microns, then dry it at 120°C, and then press it with the F-containing composite film at a certain temperature and pressure, and the pressure temperature is 100°C. Pressure 15Kg / cm 2 , and then baked at 100°C for 6 hours;

[0051] (4) Coat the surface of the other side of the PET film with glue, the coating thickness is 50 microns, dry ...

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Abstract

The invention discloses a solar cell backboard with excellent weathering resistance and a preparation method for the solar cell backboard. The cell backboard has a five-layer structure which from outside to in side successively comprises an F (fluorine)-containing composite film, a first glue layer, a PET (polyethylene glycol terephthalate) thin film, a second glue layer and a transition layer. According to the solar cell backboard, the F-containing composite film and the transition layer are used for replacing an imported PVDF (polyvinylidene fluoride) film or a PVF (polyvinyl fluoride) film, so that the cost is greatly lowered. Meanwhile, the F-containing composite film can resist such damages as ultraviolet irradiation and the like, the backboard is guaranteed to have excellent weathering resistance, and the backboard and a solar cell assembly are guaranteed to have excellent bonding strength by adoption of the transition layer.

Description

technical field [0001] The invention relates to a back plate used in a solar battery module and a preparation method thereof. Background technique [0002] Traditional energy sources such as coal and petroleum are still the main energy sources in today's society. However, with the daily consumption of conventional energy and the resulting global pollution and climate problems, people are turning their attention to renewable energy, and hope that renewable energy can change human energy structure to maintain human sustainable development develop. Among them, solar energy has become the focus of attention due to its unique advantages. At present, the main ways for humans to use solar energy are: light-to-heat conversion, light-to-heat conversion to electricity, and light-to-electricity conversion (ie, photovoltaic power generation). Among them, photovoltaic power generation is favored for its cleanliness and safety, and has achieved considerable development in recent years....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048H01L31/18B32B27/08H01L31/049
CPCY02E10/50Y02P70/50
Inventor 杨卫国
Owner JIANGSU UNIV OF SCI & TECH
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