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A kind of solar battery back plate and preparation method thereof

A solar cell and backplane technology, applied in chemical instruments and methods, circuits, photovoltaic power generation, etc., can solve the problems of simple preparation process and high reflectivity of solar battery backplane, and achieve simple preparation method, reduce process and reduce heat The effect of pressing and curing time

Active Publication Date: 2019-07-23
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing solar cell back sheet cannot simultaneously have high reflectivity, simple preparation process, and good adhesion with the EVA adhesive layer, the invention provides a polyester film, a solar cell back sheet and a preparation method thereof

Method used

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  • A kind of solar battery back plate and preparation method thereof
  • A kind of solar battery back plate and preparation method thereof
  • A kind of solar battery back plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The main layer consists of 85% PET chips and 15% TiO 2 Particles, TiO 2 The average particle size of the particles is 0.1 μm, and the support layer contains 98% PET chips and 2% polycarbodiimide. The raw materials of the main layer and the support layer are weighed according to the above formula, after being dried and mixed by the twin-screw extruder, they are melted and mixed, and the main layer and the support layer are co-extruded and cast on the large cold drum at the die head to form a thick Then the thick sheet is stretched longitudinally, stretched transversely, shaped and cooled to form a polyester film layer (also known as polyester film). After adjusting the blanking ratio, the thickness of the support layer is controlled to be 10 μm, and the thickness of the main layer is 230 μm. The thickness of each layer of the polyester film layer, mechanical properties, water vapor transmission rate, reflectivity, and thermal shrinkage rate were evaluated, and the eval...

Embodiment 2

[0061] The main layer consists of 85% PET chips and 15% TiO 2 Particles, TiO 2 The average particle size of the particles is 0.2 μm, and the support layer contains 95% PET chips and 5% polycarbodiimide. The raw materials of the main layer and the support layer are weighed according to the above formula, after being dried and mixed by the twin-screw extruder, they are melted and mixed, and the main layer and the support layer are co-extruded and cast on the large cold drum at the die head to form a thick Then the thick sheet is stretched longitudinally, stretched transversely, shaped and cooled to form a polyester film layer. After adjusting the blanking ratio, the thickness of the support layer is controlled to be 15 μm, and the thickness of the main layer is 220 μm. The thickness of each layer of the polyester film layer, mechanical properties, water vapor transmission rate, reflectivity, and thermal shrinkage rate were evaluated, and the evaluation results were summarized ...

Embodiment 3

[0063] The main layer consists of 85% PET chips and 15% TiO 2 Particles, TiO 2 The average particle size of the particles is 0.4 μm, and the support layer contains 92% PET flakes and 8% polycarbodiimide. The raw materials of the main layer and the support layer are weighed according to the above formula, after being dried and mixed by the twin-screw extruder, they are melted and mixed, and the main layer and the support layer are co-extruded and cast on the large cold drum at the die head to form a thick Then the thick sheet is stretched longitudinally, stretched transversely, shaped and cooled to form a polyester film layer. After adjusting the blanking ratio, the thickness of the support layer is controlled to be 20 μm, and the thickness of the main layer is 210 μm. The thickness of each layer of the polyester film layer, mechanical properties, water vapor transmission rate, reflectivity, and thermal shrinkage rate were evaluated, and the evaluation results were summarized...

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Abstract

The invention relates to the field of solar battery backboards, in particular to a polyester film, a solar battery backplane and a preparation method thereof. In order to solve the problem that the existing solar cell back sheet cannot have high reflectivity, simple preparation process, and good adhesion with the EVA adhesive layer, the invention provides a polyester film, a solar cell back sheet and a preparation method thereof . The polyester film includes a main layer and support layers arranged on both sides of the main layer; the main layer includes 75-85% of thermoplastic polyester and 15-25% of inorganic particles, and the inorganic particles are dispersed in thermoplastic polyester; The support layer comprises thermoplastic polyester 90-98% and hydrolysis resistance additive 2-10%. The solar cell back plate has high reflectivity, can effectively utilize the light passing through the solar cells and gaps between the cells, and effectively improve the power generation efficiency of the solar cells.

Description

technical field [0001] The invention relates to the field of solar battery backboards, in particular to a polyester film, a solar battery backplane and a preparation method thereof. Background technique [0002] In recent years, with the depletion of fossil fuels (also known as fossil fuels) and the intensification of environmental problems, photovoltaic power generation has attracted more and more attention because of its clean and renewable advantages. The solar cell module is composed of five parts: glass surface layer, EVA film, silicon cell, EVA film and back sheet. Among them, the back sheet, as the support of the entire solar cell module, is required to have electrical insulation, water vapor permeability resistance, weather resistance, high mechanical strength, and good adhesion to the packaging film. At present, the biggest problem faced by solar cells is that the power generation efficiency is generally low, and the actual solar power generation efficiency can onl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/20B32B27/36H01L31/048H01L31/049H01L31/054C08L67/02C08L79/00C08L67/04C08L77/06C08L77/02C08L23/26C08K3/22C08K3/30C08K3/26C08K3/36C09D133/00C09D5/32
CPCY02E10/52
Inventor 金亚东李金标
Owner NINGBO CHANGYANG TECH