CN212400550U

CN212400550U - High-weather-resistance high-barrier solar cell backboard

Info

Publication number: CN212400550U
Application number: CN202020697945.4U
Authority: CN
Inventors: 秦志凤; 王猛; 陆欢; 刘全; 胡蓓; 蒙钊
Original assignee: JIANGSU YUXING FILM TECHNOLOGY CO LTD
Current assignee: JIANGSU YUXING FILM TECHNOLOGY CO LTD
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2021-01-26
Anticipated expiration: 2030-04-29

Abstract

The utility model relates to a high resistant solar cell backplate of waiting, including superpose fixed connection in proper order be used for ultraviolet resistant first resistant polyester layer of waiting, be used for the liquid crystal polymer layer in the middle of the steam separation and be used for the resistant polyester layer of waiting with the second that the EVA membrane bonds, first resistant polyester layer of waiting, liquid crystal polymer layer and the resistant polyester layer of waiting of third extrude the back simultaneously and draw the membrane shaping, the thickness on first resistant polyester layer of waiting 20 ~ 300 mu m, the thickness on liquid crystal polymer layer is at 5 ~ 50 mu m, the resistant polyester layer thickness of waiting of second is at 30 ~ 200 mu m. The utility model discloses have the characteristic of high resistant time, high resistant separation, to environment friendly, have good dimensional stability, can simplify manufacturing procedure, reduction in production cost.

Description

High-weather-resistance high-barrier solar cell backboard

Technical Field

The utility model relates to a high resistant solar cell backplate that separates of waiting belongs to solar cell technical field.

Background

The solar cell backboard is an essential part of a solar cell panel, and plays an important role in protecting a cell module from external environments such as ultraviolet irradiation, water vapor erosion and the like, so that the solar cell backboard is required to have the insulation property of the traditional meaning, and also has the characteristics of excellent ultraviolet irradiation resistance, hydrolysis resistance, water vapor barrier and the like so as to ensure that the solar cell can be used outdoors for a long time.

The two technical routes are mature at present and account for the main share of the market in the field, but the back plates manufactured by the two methods contain fluorine materials and adhesives, the recycling of scrapped components is difficult, the environment is not friendly, and certain quality problems such as layering, cracking and the like exist in the use process. Meanwhile, the battery back plate with the structure has the disadvantages of reduced dimensional stability and high production cost due to complicated production procedures.

Disclosure of Invention

The utility model aims at providing a can improve resistant separation performance of waiting, have good dimensional stability, can simplify manufacturing procedure, reduction in production cost's high resistant solar cell backplate that separates.

The utility model discloses a technical scheme who reaches above-mentioned purpose is: the utility model provides a high resistant high separation solar cell backplate which characterized in that: the solar water-based solar.

The utility model discloses high resistant high resistant solar cell backplate is including superpose fixed connection's first resistant polyester layer of waiting, middle liquid crystal polymer layer and the resistant polyester layer of second in proper order, and the layering phenomenon that traditional solar cell backplate probably appears can not appear with the adhesive between each layer, and does not contain the fluorine material, and is very friendly to the environment. The utility model discloses a first resistant polyester layer of waiting is as the skin of battery backplate, and first resistant polyester layer of waiting has good uvioresistant performance and improves its performance. The utility model discloses an in the middle of adopting liquid crystal polyester material as the steam barrier layer, because of liquid crystal polyester film has high separation nature and weatherability, thickness can be controlled relatively thin can be in order to reach fine steam separation performance, has better low moisture absorption and resistance to chemicals, can keep the mechanical properties of solar cell backplate for a long time. The utility model discloses a resistant polyester layer of waiting of second directly bonds with inlayer EVA membrane, can keep excellent cohesiveness. The utility model discloses a three layer construction solar cell backplate has good compatibility, can extrude the posterosuperior membrane shaping simultaneously through the three-layer die head, is thermoplastic material because of the battery backplate material, has good compatibility, has good dimensional stability, has simplified traditional numerous and diverse production technology, can reduction in production cost.

Drawings

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is the structural schematic diagram of the high weather-proof high-barrier solar cell back plate of the present invention.

Wherein: 1-a first weather-resistant polyester layer, 2-a liquid crystal high polymer layer and 3-a second weather-resistant polyester layer.

Detailed Description

See fig. 1, the utility model discloses a high resistant time separates solar cell backplate, including superpose fixed connection in proper order be used for ultraviolet-resistant first resistant time polyester layer 1, be used for the middle liquid crystal polymer layer 2 of steam separation and be used for the resistant time polyester layer 3 of second that bonds with the EVA membrane.

It is shown in figure 1, the utility model discloses first resistant polyester layer 1 of waiting, liquid crystal high polymer layer 2 and the resistant polyester layer of second are able to bear or endure draws the membrane shaping after extruding simultaneously through the three-layer die head, the utility model discloses a first resistant polyester layer 1 of waiting, liquid crystal high polymer layer 2 and the resistant polyester layer 3 of second are able to bear or endure extrudes simultaneously and fixed connection, need not to use the gluing agent, when simplifying the production process of solar energy backplate, make polyester film solar cell backplate have excellent weatherability and mechanical properties.

As shown in fig. 1, the first weather-resistant polyester layer 1 and the second weather-resistant polyester layer 3 of the present invention contain light stabilizers and/or uv absorbers, the uv absorbers may be conventional benzotriazole compounds, 2-hydroxybenzophenone derivatives, etc., the light stabilizers may be conventional hindered amine light stabilizers, such as imidazolidinone compounds, azacyclic alkanone compounds, piperidine compounds, etc., and the first weather-resistant polyester layer 1 has good uv resistance. The utility model discloses the content of light stabilizer and/or ultraviolet absorbent in the weather-resistant polyester layer 3 of second is less than light stabilizer and/or ultraviolet absorbent in the first weather-resistant polyester layer 1, and weather resistance requires lowly because of not direct and external environment contact on the weather-resistant polyester layer 3 of second, through adding light stabilizer and/or ultraviolet absorbent that is less than first weather-resistant polyester layer 1, on the basis of guaranteeing to have certain weatherability, excellent cohesiveness has been kept with the inlayer EVA material simultaneously.

As shown in FIG. 1, the thickness of the first weather-resistant polyester layer 1 of the present invention is 20 to 300 μm, preferably 50 to 250 μm, such as 80 to 220 μm, or 100 to 250 μm, etc., the thickness of the middle liquid crystal polymer layer 2 is 5 to 50 μm, the thickness of the liquid crystal polymer layer 2 is 5.5 to 9.5 μm, so that the battery back plate has good toughness and operability, the thickness of the liquid crystal polymer layer 2 is 20 to 40 μm, and has outstanding dimensional stability, the thickness of the second weather-resistant polyester layer 3 is 30 to 200 μm, the thickness of the second weather-resistant polyester layer 3 is 50 to 188 μm, such as 100 to 150 μm, etc., so that the solar battery back plate can be used outdoors for a long time.

The utility model discloses a high resistant time high resistant separates solar cell backplate can be according to following step preparation:

firstly, blending a light stabilizer and/or an ultraviolet absorbent with polyester chips, and preparing an ultraviolet-resistant polyester master batch for later use by melt extrusion.

Secondly, mixing 90-97% of dried polyester chips with the intrinsic viscosity of 0.6-1.0 dl/g and 3-10% of uvioresistant polyester master batch according to the mass percentage, and then feeding the mixture into an extruder A for melting; feeding the dried liquid crystal polyester granules with the melting point of 250-300 ℃ into a B extruder for melting; mixing 95-99% of dried polyester chips with the intrinsic viscosity of 0.6-1.0 dl/g and 1-5% of uvioresistant polyester master batch, and feeding the mixture into a C extruder for melting. The three-layer is crowded fuse-element altogether and is gone out at the three-layer die head after coarse filter, measuring pump, fine filter respectively and to join an organic whole and extrude, indulges respectively after casting the piece roller design, transverse stretching, and the rolling film forming after the design cooling makes the utility model discloses high resistant time high resistant separates solar cell backplate.

Claims

1. The utility model provides a high resistant high separation solar cell backplate which characterized in that: the solar water-based solar.

2. The highly weatherable high-barrier solar cell backsheet according to claim 1, characterized in that: the thickness of the liquid crystal polymer layer is 5.5-9.5 μm.

3. The highly weatherable high-barrier solar cell backsheet according to claim 1, characterized in that: the thickness of the liquid crystal polymer layer is 20-40 mu m.

4. The highly weatherable high-barrier solar cell backsheet according to claim 1, characterized in that: the thickness of the first weather-resistant polyester layer is 50-250 mu m.

5. The highly weatherable high-barrier solar cell backsheet according to claim 1, characterized in that: the thickness of the second weather-resistant polyester layer is 50-188 micrometers.