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Solar cell backboard membrane

A technology for solar cells and backplane films, which is applied in circuits, photovoltaic power generation, electrical components, etc., and can solve problems such as the impact of backplane film anti-ultraviolet ability on the service life of solar cells, affecting the output power of solar cells, and the decrease in reflectivity of backplanes. , to achieve the effect of meeting the requirements of outdoor use, improving anti-aging ability and excellent composite strength

Inactive Publication Date: 2016-12-07
上海紫江彩印包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the UV resistance of the backsheet film has a great influence on the service life of the solar cell
The backsheet with insufficient UV resistance will turn yellow under the irradiation of ultraviolet light, the molecular structure will be destroyed, and the performance will decrease. At the same time, the reflectivity of the backsheet will decrease, which will affect the output power of the solar cell.

Method used

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Embodiment 1

[0027] This embodiment provides a composite film for solar battery backplane with ultra-high reflectivity and high anti-ultraviolet performance, which is a polyethylene film.

[0028] Such as figure 1 As shown, three layers of films are usually compounded on the back plate of the solar cell, which are fluorine film 1, polyester film 2, and polyethylene film 3 provided in this embodiment in sequence from the inside to the outside.

[0029] figure 2 It is a schematic structural diagram of the polyethylene film provided in this embodiment, and the polyethylene film is sequentially composed of a composite layer 3-1, a reflective layer 3-2, and an ultraviolet absorbing layer 3-3 from the inside to the outside. The polyethylene film is a multi-layer co-extrusion structure, which is formed by co-extrusion blow molding.

[0030] The thickness of the polyethylene film was 50 μm. Wherein, the composite layer 3-1 has a thickness of 10 μm, the reflective layer 3-2 has a thickness of 3...

Embodiment 2

[0037] This embodiment provides a composite film for solar battery backplane with ultra-high reflectivity and high anti-ultraviolet performance, which is a polyethylene film.

[0038] Such as figure 1 As shown, three layers of films are usually compounded on the back plate of the solar cell, which are fluorine film 1, polyester film 2, and polyethylene film 3 provided in this embodiment in sequence from the inside to the outside.

[0039] figure 2 It is a schematic structural diagram of the polyethylene film provided in this embodiment, and the polyethylene film is sequentially composed of a composite layer 3-1, a reflective layer 3-2, and an ultraviolet absorbing layer 3-3 from the inside to the outside. The polyethylene film is a multi-layer co-extrusion structure, which is formed by co-extrusion blow molding.

[0040] The thickness of the polyethylene film was 100 μm. Wherein, the composite layer 3-1 has a thickness of 20 μm, the reflective layer 3-2 has a thickness of ...

Embodiment 3

[0047] This embodiment provides a composite film for solar battery backplane with ultra-high reflectivity and high anti-ultraviolet performance, which is a polyethylene film.

[0048] Such as figure 1 As shown, three layers of films are usually compounded on the back plate of the solar cell, which are fluorine film 1, polyester film 2, and polyethylene film 3 provided in this embodiment in sequence from the inside to the outside.

[0049] figure 2 It is a schematic structural diagram of the polyethylene film provided in this embodiment, and the polyethylene film is sequentially composed of a composite layer 3-1, a reflective layer 3-2, and an ultraviolet absorbing layer 3-3 from the inside to the outside. The polyethylene film is a multi-layer co-extrusion structure, which is formed by co-extrusion blow molding.

[0050] The polyethylene film thickness was 150 μm. Wherein, the composite layer 3-1 has a thickness of 30 μm, the reflective layer 3-2 has a thickness of 90 μm, ...

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Abstract

The invention provides a solar cell backboard membrane. The solar cell backboard membrane is combined to the outmost layer of a solar cell backboard and is of a multi-layer coextrusion structure. The solar cell backboard membrane comprises an ultraviolet absorption layer used for absorbing most ultraviolet in sunlight, a reflecting layer used for reflecting and removing residual ultraviolet which penetrates through the ultraviolet absorbing layer, and a composite layer which is combined to an inside membrane on the solar cell backboard in advance which are sequentially arranged from outside to inside. By means of free radicals produced when the ultraviolet absorbing layer absorbs solar radiation, the ageing resistance is improved; due to the fact that the residual ultraviolet penetrating through the ultraviolet absorbing layer is reflected and removed through the reflecting layer, damage to a polyethylene film is relieved, the luminous reflectance is increased, and the power generation efficiency is improved; by means of the composite layer, it is guaranteed that the membrane has good composite performance. The solar cell backboard membrane has ultrahigh reflectivity, good anti-ultraviolet performance and excellent composite strength. The solar cell backboard membrane can meet the requirement of long-time outdoor using of the solar cell backboard, in the production process, the solar cell backboard membrane is easy to rework, waste is reduced, and the cost is low.

Description

technical field [0001] The invention relates to a solar battery backboard film, in particular to a polyethylene film for compounding a solar battery backplane with ultra-high reflectivity and high ultraviolet resistance performance, and belongs to the technical field of application of polymer materials on photovoltaic modules. Background technique [0002] In the production of solar backsheets used in the photovoltaic module industry, polyethylene-vinyl acetate films were generally used before; in recent years, polyethylene films have increasingly replaced polyethylene-vinyl acetate films. On the one hand, the backsheet produced by polyethylene film is easier to rework during the production of photovoltaic modules, and it can also reduce defective products and waste for photovoltaic module manufacturers, so it is welcomed by photovoltaic module manufacturers; on the other hand, polyethylene film Compared with polyethylene-vinyl acetate film, it has a lower price, which can e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/049H01L31/048H01L31/054H01L31/0216
CPCY02E10/52H01L31/049H01L31/02165H01L31/0481H01L31/0547
Inventor 李万波陈涛
Owner 上海紫江彩印包装有限公司
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