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Preparation method of high reflection solar cell back plate film

A solar cell, high-reflection technology, applied in chemical instruments and methods, film/sheet adhesives, circuits, etc., can solve the problems of inability to increase the power of components, complicated production processes, and prolonged production cycles, and achieve improved performance. Overall water blocking performance, improved reflectivity, good bonding performance

Active Publication Date: 2018-01-19
ZHONGTIAN PHOTOVOLTAIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inner layer material of the backplane plays an important role in improving the reflectivity. At present, the common inner layer materials of the backplane include K film, T film, fluorine coating and the film layer independently developed by the backplane manufacturer, but the reflectivity is poor. , can not achieve the effect of improving the power of components
[0004] Although some manufacturers have developed high-reflection solar backplanes, such as a high-reflectivity solar cell backplane film and its preparation method announced by patent CN 103022192 A; but its production process is too complicated and needs to be bonded with adhesive On the one hand, the cost has increased, on the other hand, the adhesive has special requirements for temperature and so on, and prolongs the production cycle

Method used

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  • Preparation method of high reflection solar cell back plate film

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specific Embodiment 1

[0017] A method for preparing a highly reflective solar cell backplane film disclosed by the present invention specifically includes the following steps:

[0018] 70 parts of PP resin, 20 parts of white POE masterbatch, 5 parts of titanium dioxide and 6 parts of talcum powder mixed filler (the ratio of titanium dioxide and talc powder is 5:1), 0.5 parts of triethyl phosphate, 0.5 parts of antioxidant 1010, 2 1 part of polycarbodiimide UN-03, 2 parts of 2-(4,6-diphenyl-1,3,5-triazin-2-yl-)-5-hexyloxyphenol mixed, extruded by twin-screw Extrusion granulation, the temperature in zone I of the twin-screw extruder is 65°C, the temperature in zone II is 165°C, the temperature in zone III is 185°C, the temperature in zone IV is 195°C, the temperature in zone V is 210°C, and the temperature of the head is 200°C. Stay in the twin-screw for 3.5 minutes to obtain the adhesion layer masterbatch;

[0019] Take 50 parts of PET particles with a molecular weight of 47000 and dry them in a va...

specific Embodiment 2

[0022] 65 parts of PE resin, 30 parts of white POE masterbatch, 5 parts of titanium dioxide and 6 talcum powder mixed filler (the ratio of titanium dioxide and talc powder is 5:1), 0.5 part of triethyl phosphate, 0.5 part of antioxidant 1010, 2 parts Polycarbodiimide UN-03, 2 parts of 2-(4,6-diphenyl-1,3,5-triazin-2-yl-)-5-hexyloxyphenol mixed, extruded by twin-screw Machine extrusion granulation, in the twin-screw extruder, the temperature in zone I is 65°C, the temperature in zone II is 165°C, the temperature in zone III is 185°C, the temperature in zone IV is 195°C, the temperature in zone V is 210°C, and the temperature of the head is 200°C. Stay in the twin-screw for 3.5 min to obtain the adhesion layer masterbatch;

[0023] Take 70 parts of PET particles with a molecular weight of 47000 and dry them in a vacuum drum at 80°C for 3 hours, add 0.1 parts of triethyl phosphate, 0.1 parts of pentaerythritol tetrakis (bis-T-butyl hydroxyhydrocinnamic acid) ester, 0.1 parts Ant...

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Abstract

The invention discloses a preparation method of a high reflection solar cell back plate film. The method comprises: a twin-screw extruder is used to respectively prepare an adhesive layer master batch, a barrier layer master batch and a high reflection master batch; four single-screw extruders are used to extrude lip films of the three master batches melted under the 250 degrees Celsius from the casting heads; a non-woven fabric layer is added to two barrier layers to be used as a base layer, so that the lip films is extruded and casted onto the surface of the non-woven fabric layer to form one piece, and after the lip film is cooled down to room temperature by cooling rolls, the high reflection solar cell back plate film is achieved.

Description

technical field [0001] The invention belongs to the field of solar battery backplanes, and in particular relates to a preparation method of a high-reflection solar battery backplane film. Background technique [0002] Solar photovoltaic modules are mainly composed of photovoltaic tempered glass, upper EVA film, crystalline silicon cells, lower EVA film and back sheet. The common photovoltaic backsheet generally has a five-layer structure, which is the inner layer of the backsheet, the adhesive layer, the PET layer, the adhesive layer and the outermost protective layer from top to bottom. According to the different materials used in each layer of the backplane, the backplane can be divided into TPT, KPK, KPF, KPE, etc. [0003] Photovoltaic backsheet not only has the function of protecting components, but also can effectively improve power generation efficiency. According to research, for every 8% increase in the reflectivity of the backplane, the power generation of a 250W...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L31/049
CPCH01L31/049H02S40/22Y02E10/52B32B37/153B32B2037/1215B32B2305/28B32B2305/30B32B2307/416B32B2323/04B32B2323/10B32B2367/00B29C48/21B29C48/397C09J123/06C09J123/12C09J7/30H01L31/1876
Inventor 王艳宁王强陈坤刘香安廖洁
Owner ZHONGTIAN PHOTOVOLTAIC MATERIALS
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