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Solar cell back sheet, preparation method thereof and solar cell

A solar cell and backplane technology, which is applied in the field of solar cells, can solve problems such as poor bonding force and poor heat dissipation performance of solar cell backplanes, and achieve the effects of good bonding force, increased bonding force, and increased surface and roughness

Active Publication Date: 2013-03-06
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems of poor heat dissipation and poor bonding force of the solar cell back sheet in the prior art, the present invention provides a solar cell back sheet with good thermal performance and good bonding force, its preparation method and the back sheet containing the solar cell back sheet. solar cells

Method used

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preparation example Construction

[0024] According to the preparation method provided by the present invention, preferably, the electrostatic spraying is electrostatic spraying of powder coating or electrostatic spraying of solvent-based coating. After using the method of electrostatic spraying, the adhesion of the coating is high, and the powder that is not attached to the aluminum alloy plate can be recycled, and there is basically no waste of raw materials, which can save costs very well. At the same time, passivation or micro-etching treatment is carried out on the metal aluminum alloy plate layer before electrostatic spraying. Passivation or micro-etching treatment can increase the surface and roughness of the metal aluminum alloy plate layer, and further increase the organic insulating layer and the metal aluminum alloy plate. Cohesion between layers.

[0025] For the electrostatic spraying of the powder coating, the spraying voltage is generally controlled at 40-100KV, the air pressure for powder supply...

Embodiment 1

[0041] The aluminum alloy plate (model: 5052) with a thickness of 0.3mm is subjected to passivation pretreatment, and then the electrostatic spraying composite coating of solvent-based paint is applied to both sides of it, and finally it is dried at 160°C for 60 minutes to obtain solar battery backplane A1 . The thickness of the primer was 7.5 μm, and the thickness of the topcoat was 27.5 μm. The primer and topcoat are fluorocarbon coatings from PPG, the model is DURANAR? XL WHITE.

Embodiment 2

[0043] The aluminum alloy plate (type: 1060) with a thickness of 0.15mm was subjected to passivation pretreatment, and then its two sides were electrostatically sprayed with powder coating for a single coating, and finally it was sintered at 240°C for 25min to obtain solar battery backplane A2. The coating thickness is 25 μm. AKZO NOBEL company's fluorocarbon resin, the model is Interpon? powder coatings D3000 fm.

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Abstract

The invention provides a solar cell back sheet. The back sheet comprises a metal aluminum alloy plate layer, an organic insulated layer and an anti-corrosion layer, wherein the organic insulated layer is arranged on one face of the metal aluminum alloy plate layer by virtue of electrostatic spraying, and the anti-corrosion layer is arranged on the other face of the metal aluminum alloy plate layer; and the metal aluminum alloy plate layer contains at least one of polyvinyl fluoride resin, polyvinylidene fluoride resin, polytrifluoroethylene resin, polytetrafluoroethylene resin or copolymers of monomers of the polyvinyl fluoride resin, the polyvinylidene fluoride resin, the polytrifluoroethylene resin and monomers of the other resins. The invention further provides a preparation method of the back sheet and a solar cell containing the back sheet. A well binding force exists between the organic insulated layer and the metal aluminum alloy plate layer of the back sheet provided by the invention.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a solar cell backboard, a preparation method thereof, and a solar cell. Background technique [0002] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect. It is a new type of power supply that will be mainly developed in the future. It has three advantages of permanence, cleanliness and flexibility, and its market prospect is broad. Solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the near future, not only to replace some conventional energy sources, but also to become the main body of the world's energy supply. [0003] A solar cell panel is usually a stacked structure, which mainly includes a transparent cover plate, a sealant layer, a solar cell sheet, a sealant layer and a solar cell back sheet by lamination. Among them, the main function of...

Claims

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Application Information

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IPC IPC(8): H01L31/048H01L31/18H01L31/042H01L31/049
CPCY02E10/50Y02P70/50
Inventor 秦世嵘张日清周勇姚云江袁永乐关敬波
Owner BYD CO LTD
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