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Solar cell backboard polyester film with high water resistance, high heat dissipation and high reflection

A technology of solar cells and polyester films, applied in circuits, electronic equipment, electrical components, etc., can solve problems such as backplane structure and complex processing technology, and achieve the effects of low production cost, increased production cost, and good heat dissipation function

Inactive Publication Date: 2020-05-12
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the backsheets improve the water-blocking performance mainly by adding a barrier layer, which makes the backsheet structure and processing technology complicated. For example, the authorized announcement number is CN 206340561 U Chinese patent discloses a high water-resistance solar module backsheet containing aluminum foil , a layer of aluminum foil is added to the back plate to obtain a high-resistance water back plate; the authorized announcement number is CN 206271721 U Chinese patent discloses a high-barrier solar cell back plate with a multi-layer structure, adding A high-barrier PVDC layer, resulting in a high-barrier water solar cell backsheet

Method used

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  • Solar cell backboard polyester film with high water resistance, high heat dissipation and high reflection
  • Solar cell backboard polyester film with high water resistance, high heat dissipation and high reflection
  • Solar cell backboard polyester film with high water resistance, high heat dissipation and high reflection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A high water-resistance polyester film used for solar battery backplanes. The preparation method of the polyester film is a three-layer co-extrusion technology, and the ABA three-layer structure is obtained by successively casting, longitudinal drawing, horizontal drawing and winding. Polyester film.

[0043] The content of boron nitride in layer A of the polyester film is 1%, the content of titanium dioxide is 1%, the content of anti-UV agent is 2%, and the content of PET resin is 96%; the content of talcum powder in the layer B of the polyester film is 0.5% %, the titanium dioxide content is 1%, the mixed resin content is 98.5%, among which the PET content is 60%, and the PEN content is 40%. The particle size of titanium dioxide in layer A of the polyester film is 6000 mesh, the particle size of boron nitride is 50 nm, the particle size of talc powder in layer B of the polyester film is 6000 mesh, and the particle size of titanium dioxide is 6000 mesh. The total thic...

Embodiment 2

[0045] The content of boron nitride in layer A of the polyester film is 1%, the content of titanium dioxide is 1%, the content of anti-UV agent is 2%, and the content of PET resin is 96%; the content of talcum powder in the layer B of the polyester film is 0.5% %, the titanium dioxide content is 1%, the mixed resin content is 98.5%, among which the PET content is 59.1%, and the PEN content is 39.4%. The particle size of titanium dioxide in layer A of the polyester film is 6000 mesh, the particle size of boron nitride is 50 nm, the particle size of talc powder in layer B of the polyester film is 6000 mesh, and the particle size of titanium dioxide is 6000 mesh. The total thickness of the polyester film is 200 μm, wherein the thickness of layer A is 20 μm, and the thickness of layer B is 160 μm. The water vapor transmission rate, thermal conductivity and reflectance test results of the polyester film are shown in Table 1.

Embodiment 3

[0047] The content of boron nitride in layer A of the polyester film is 1%, the content of titanium dioxide is 1%, the content of anti-UV agent is 2%, and the content of PET resin is 96%; the content of talcum powder in the layer B of the polyester film is 0.5% %, the titanium dioxide content is 1%, the mixed resin content is 98.5%, among which the PET content is 59.1%, and the PEN content is 39.4%. The particle size of titanium dioxide in layer A of the polyester film is 6000 mesh, the particle size of boron nitride is 50 nm, the particle size of talc powder in layer B of the polyester film is 6000 mesh, and the particle size of titanium dioxide is 6000 mesh. The total thickness of the polyester film is 250 μm, wherein the thickness of layer A is 15 μm, and the thickness of layer B is 220 μm. The water vapor transmission rate, thermal conductivity and reflectance test results of the polyester film are shown in Table 1.

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Abstract

The invention provides a polyester film for a solar cell backboard. The polyester film is of an ABA three-layer structure, wherein the layer A is composed of a PET resin, boron nitride, titanium dioxide and an anti-UV agent, and the layer B is composed of a PET / PEN blended resin, talcum powder and titanium dioxide. The polyester film for the solar backboard has the functions of high water resistance and high heat dissipation, also has the function of high reflection, and can effectively prolong the service life of a solar cell assembly and improve the income of the assembly.

Description

technical field [0001] The invention relates to the technical field of solar battery components, in particular to a polyester film for a solar battery back plate with high water resistance, high heat dissipation and high reflection. Background technique [0002] The solar cell module structure usually includes a glass layer, an EVA encapsulation layer, a silicon battery sheet, an EVA encapsulation layer and a solar cell backsheet. Among them, the main function of the solar battery backsheet is to provide support for the solar battery sheet, prevent water vapor from entering the interior of the module, and improve the service life, power generation efficiency and stability of the battery module. At present, the backsheet of solar cells is usually coated with fluorine-containing paint or laminated with fluorine film on the surface of polyester substrate. Water performance is also average. However, the infiltration of water vapor during the use of the solar cell module will s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/36H01L31/049H01L31/052H01L31/054C08L67/02C08K3/00C08K3/22C08K3/30C08K3/34C08K3/26C08K3/38C08K3/28
CPCB32B27/08B32B27/36B32B2307/30B32B2307/416B32B2307/7265B32B2457/12C08K3/28C08K3/38C08K2003/2206C08K2003/222C08K2003/2227C08K2003/2241C08K2003/2296C08K2003/265C08K2003/285C08K2003/3045C08K2003/385C08K2201/011C08L67/02C08L2201/14C08L2205/025H01L31/052H01L31/049H01L31/0547C08K3/00C08K3/22C08K3/30C08K3/34C08K3/26C08K3/346Y02E10/52
Inventor 金亚东杨承翰刘方冰朱正平
Owner NINGBO CHANGYANG TECH