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Preparation method and application of a solar cell encapsulation front film

A solar cell and front film technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low light transmittance of PTFE, difficulty in meeting power supply requirements, limiting the single working time of drones, etc., and achieve light transmittance. Improved, good mechanical properties, excellent high temperature resistance

Active Publication Date: 2017-04-05
DONGJUN NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a problem with using PTFE film as the pre-encapsulation film, because the light transmittance of PTFE itself is low, usually only about 40%, which leads to the low light absorption efficiency of photovoltaic cells in the above technology, and it is difficult to meet the power supply demand.
Although among various energy storage devices, lithium batteries have a relatively suitable mass-to-energy ratio and mass-to-power ratio, but for drones, the performance of lithium batteries directly determines its ability to last for drones, which also means It has become a bottleneck that limits the single working time of drones

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the film before solar cell encapsulation described in this embodiment comprises the following steps:

[0036](1) Mix kerosene with a mass ratio of 4:0.1 and sodium perfluorooctanoate evenly to form a composite solvent; in the kerosene, the content of isoparaffins is 90wt%, and the content of normal paraffins is 8wt%;

[0037] (2) Add the composite solvent of step (1) into the polytetrafluoroethylene powder, stir at a constant temperature of 14°C at a speed of 20r / min for 0.5h, and then mature in a nitrogen atmosphere at a constant temperature of 24°C for 10h , to get cooked material;

[0038] Wherein, the purity of the polytetrafluoroethylene powder is 99.9%, the crystallinity≤80%, the particle size is 0.1-0.2 μm, the molecular weight is 7 million, and the mass ratio of the polytetrafluoroethylene powder to the kerosene in the composite solvent is 20 : 1;

[0039] (3) Carry out compression molding treatment to the clinker of step (2), the pre...

Embodiment 2

[0049] The preparation method of the film before solar cell encapsulation described in this embodiment comprises the following steps:

[0050] (1) mixing kerosene and toluene with a mass ratio of 5:0.1 to form a composite solvent; in the kerosene, the content of isoparaffins is 86wt%, and the content of normal paraffins is 11wt%;

[0051] (2) Add the composite solvent of step (1) to the polytetrafluoroethylene powder, stir at a constant temperature of 10°C at a speed of 50r / min for 0.5h, and then mature in a nitrogen atmosphere at a constant temperature of 32°C for 12h , to get cooked material;

[0052] Wherein, the purity of the polytetrafluoroethylene powder is 99.9%, the degree of crystallinity≤80%, the particle size is 0.1-0.2 μm, the molecular weight is 10 million, and the mass ratio of the polytetrafluoroethylene powder to the kerosene in the composite solvent is 22.5 : 1;

[0053] (3) Carry out compression molding treatment to the clinker of step (2), the pressure of ...

Embodiment 3

[0063] The preparation method of the film before solar cell encapsulation described in this embodiment comprises the following steps:

[0064] (1) mixing kerosene and polyalkenyl succinimide with a mass ratio of 4.5: 0.1 to form a composite solvent, then adding bisphenol A epoxy resin to the composite solvent to obtain a mixture;

[0065] Wherein, the mass ratio of the bisphenol A type epoxy resin and the kerosene in the composite solvent is 2:5; in the kerosene, the content of isoparaffins is 87wt%, and the content of normal paraffins is 9wt%;

[0066] (2) Add the mixture of step (1) to the polytetrafluoroethylene powder, stir at a constant temperature of 18°C ​​at a speed of 80r / min for 0.5h, and then mature in a nitrogen atmosphere at a constant temperature of 40°C for 8h , to get cooked material;

[0067] Wherein, the purity of the polytetrafluoroethylene powder is 99.9%, the crystallinity≤80%, the particle size is 0.1-0.2 μm, and the molecular weight is 8.5 million, and ...

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Abstract

The invention provides a preparation method and an application of a front solar cell packaging film. The method comprises the following steps: firstly, mixing polytetrafluoroethylene powder with a complex solvent with specific components evenly; sequentially carrying out constant-temperature curing, compression molding, high-temperature thermal treatment, rapid cooling, slicing and plasma modified treatment to prepare a front film base; and sequentially evaporating an MgF2 film, a TiO2-ZrO2-La2O3 mixture film and an Al2O3 film to form the final front solar cell packaging film. The front solar cell packaging film has high light transmittance; and the light transmittance at 300-1200nm can be up to over 90.5%. Furthermore, the front solar cell packaging film provided by the invention also has excellent high-temperature resistance, abrasion resistance and weather fastness and good mechanical property, therefore, the front solar cell packaging film provided by the invention can be applicable to various extreme conditions which an unmanned aerial vehicle can face, and meets the work environment requirements of the unmanned aerial vehicle.

Description

technical field [0001] The invention relates to a method for preparing a solar cell encapsulation front film, and relates to the application of the solar cell encapsulation front film prepared by the method in weather-resistant solar cells for drones, belonging to the technical field of polymer materials. [0002] technical background [0003] In the context of global warming and deterioration of the ecological environment, looking for alternatives to fossil energy and improving the energy structure have become the focus of attention of all countries. Among many clean energy alternatives, solar energy is considered to be one of the energy sources with the greatest development potential in the future due to its cleanliness, safety, and sufficient resources, and has received great attention and support from countries all over the world. For the development and utilization of solar energy, the most representative is solar cells. In the solar cell family, flexible thin-film solar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01L31/048
CPCY02E10/50
Inventor 郑海军张亦弛夏平程晓龙殷亮
Owner DONGJUN NEW ENERGY CO LTD
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