Unlock instant, AI-driven research and patent intelligence for your innovation.

Back sheet for solar module and method for manufacturing same

A technology of solar cells and components, applied in the direction of electrical components, chemical instruments and methods, circuits, etc., can solve the problems of rising cost of the backplane, and achieve the effect of reducing the manufacturing cost and simplifying the manufacturing process

Active Publication Date: 2014-12-24
KOLON IND INC
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the Tedlar film used in the existing backplane is relatively expensive, the cost of the Tedlar film currently accounts for more than 80% of the manufacturing cost of the backplane, which is the reason for the increase in the cost of the backplane

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Back sheet for solar module and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] The preparation method of the backsheet of the present invention may include: melt-extruding a polyester resin to prepare a sheet, uniaxially stretching the sheet, coating a coating composition emulsion, and biaxially stretching in the transverse direction to prepare a polyester resin. The ester film may also include laminating a fluoride film on a polyester film using an adhesive.

[0056] More specifically, according to the present invention, a method for preparing a polyester film included in a back sheet for a solar cell module includes:

[0057] a) melt extruding the polyester resin to prepare a polyester sheet;

[0058] b) Stretching the polyester sheet in the longitudinal direction;

[0059] c) Coating a water-based coating layer containing a modified polyolefin-based resin (containing 0.01 to 10% by weight of a carboxyl group), a crosslinking agent, and water on one surface or both surfaces of a longitudinally stretched polyester film composition, then stretch...

Embodiment 1

[0076] Preparation of Coating Composition 1

[0077] Will contain 90% by weight of modified polyolefin resins (containing 4% by weight of carboxyl groups) and 10% by weight of oxazoline crosslinking agents (comprising 1.8% by weight of modified polyolefins in the entire coating composition) Resin and 0.2% by weight of oxazoline cross-linking agent), 2% by weight of SE-1015J2 (Unitika Corp., Japan), 0.3% by weight of wetting agent (Q2-5210, Dow Corning Corp.), and 97.7 % by weight of water was mixed to prepare coating composition 1.

[0078] Preparation of polyester film for backsheet

[0079] After the polyethylene terephthalate chip whose moisture content was removed to 100 ppm or less was injected into the melt extruder and melted, it was passed through a casting drum ( casting drum) was cooled and solidified to prepare a polyethylene terephthalate sheet having a thickness of 2000 μm.

[0080] The prepared polyethylene terephthalate sheet was stretched 3.5 times in the ma...

Embodiment 2

[0083] Preparation of coating composition 2

[0084]Containing 90% by weight of modified polyolefin resin (containing 4% by weight of carboxyl groups) and 10% by weight of oxazoline crosslinking agent (comprising 3.6% by weight of modified polyolefin resin in the whole coating composition and 0.4% by weight of oxazoline cross-linking agent) of 4% by weight of SE-1015J2 (Unitika Corp., Japan), 0.3% by weight of wetting agent (Q2-5210, Dow Corning Corp.), and 95.7% by weight % of water was mixed to prepare coating composition 2.

[0085] Preparation of polyester film for backsheet

[0086] After the polyethylene terephthalate chip with the moisture content removed to 100ppm or less is injected into the melt extruder and melted, it is cooled by a casting drum with a surface temperature of 20°C while extruding through a T-die And the resulting substance was cured to prepare a polyethylene terephthalate sheet having a thickness of 2000 μm.

[0087] The prepared polyethylene tere...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a back sheet for a solar module, and more particularly, to a back sheet having a novel laminated structure, which replaces the conventional structure on which PVF (Tedlar) film / PET film / PVF (Tedlar) film are laminated, and excellent hydrolysis resistant and heat sealable properties.

Description

technical field [0001] The following disclosure relates to a back sheet for a solar cell module and a manufacturing method thereof, and more particularly, to a back sheet for a solar cell module and a manufacturing method thereof, the back sheet having a structure capable of replacing an existing structure (polyvinyl fluoride (PVF , Tedlar) film / polyethylene terephthalate (PET) film / PVF (Tedlar) film sequentially laminated), excellent hydrolysis resistance and significantly excellent thermal adhesion. Background technique [0002] Solar cells used for solar power generation are made of silicon or various compounds and can generate electricity. However, since a sufficient output cannot be obtained from a single solar cell, each solar cell should be connected to each other in series or in parallel. A state in which a plurality of solar cells are connected to each other as described above is called a "solar cell module". [0003] The solar cell module is composed of glass, et...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/049B29C48/08
CPCB29K2067/00B29L2007/002Y02E10/50H01L31/049B29C48/022B29C48/08B29C48/0018H01L31/042B32B27/36H01L31/18
Inventor 金泰贤白尚铉金时敏
Owner KOLON IND INC