CN212894572U

CN212894572U - High-gain flame-retardant packaging adhesive film

Info

Publication number: CN212894572U
Application number: CN202021842478.6U
Authority: CN
Inventors: 张刚; 吕松; 黄宝玉; 季志超; 乔刚
Original assignee: Changzhou Sveck Photovoltaic New Material Co ltd
Current assignee: Changzhou Sveck Photovoltaic New Material Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-04-06
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a fire-retardant encapsulation glued membrane of high-gain down includes range upon range of high reflection polyolefin glued membrane layer, high flame retardant EVA layer and high bonding resin layer in proper order from last, and the upper surface of high reflection polyolefin glued membrane layer is equipped with a plurality of arcs, and the surface subsides of arc has metal coating layer, and the surface on metal coating layer is equipped with a plurality of reflectors that are the array form, and the lower surface on high flame retardant EVA layer is equipped with a plurality of horizontal recesses and vertical recess. The utility model adopts a high-reflection polyolefin film layer as the middle upper layer, adopts the design of an arc-shaped groove, is covered with a metal coating layer and is provided with a polyhedral structure on the surface, thereby effectively increasing the light utilization rate and improving the conversion efficiency of the component; the lower surface on high fire-retardant EVA layer is equipped with horizontal recess and vertical recess, not only has the exhaust effect, plays simultaneously and improves the bonding, reduces the bonding resin quantity, reduce cost's effect.

Description

High-gain flame-retardant packaging adhesive film

Technical Field

The utility model relates to a photovoltaic module makes technical field, more specifically says, the utility model relates to a fire-retardant encapsulation glued membrane of high-gain.

Background

Solar energy is clean energy, the working principle of a photovoltaic module is that the solar energy is directly converted into electric energy, and the continuous improvement of the power output of the photovoltaic module is a basic direction for the development of the solar photovoltaic module.

The basic structure of the solar photovoltaic module comprises 5 layers from top to bottom: the solar photovoltaic back plate comprises upper-layer high-transmittance photovoltaic glass, an upper-layer EVA (ethylene vinyl acetate) adhesive film, a battery piece, a lower-layer EVA adhesive film, a photovoltaic back plate or lower-layer photovoltaic glass. Due to the structure, sunlight enters from the glass and passes through the upper EVA adhesive film to reach the cell pieces to realize photoelectric conversion, light rays of the sunlight at the intervals among the cell pieces and at the blank positions of the cell pieces and the edges of the assemblies can be leaked, if the photovoltaic glass is arranged at the bottom, 100% of the sunlight can be directly emitted and lost, if the photovoltaic backboard is adopted, only 70-80% of the light rays are reflected to the surfaces of the cell pieces to continue power generation due to low reflectivity of the backboard, and thus 20-30% of the sunlight is lost. At present, the conventional white EVA adhesive film still has the influences of limited gain effect, low reflectivity and the like, and the power generation efficiency of the module is difficult to further improve.

In addition, the number of the current high-power solar cell modules is increased, and the size of the modules is correspondingly increased under the condition that the crystalline silicon conversion efficiency technology is not obviously improved. The exhaust channel is too long, the sunken groove structure cannot be filled with materials in time during lamination, and gas which cannot be exhausted in time often exists in the groove structure to form bubbles, so that the service life of the unit price is influenced finally.

Therefore, a need exists in the art for a high-gain flame-retardant adhesive film for packaging, which can effectively increase the light utilization rate and the conversion efficiency of the module, prevent bubbles from forming in the exhaust groove, improve the exhaust and bonding performance of the adhesive film, and facilitate the improvement of the manufacturing yield and reliability of the module.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect of prior art, the utility model provides a fire-retardant encapsulation glued membrane of high-gain effectively increases the conversion efficiency of light utilization ratio promotion subassembly, prevents to form the bubble in the air discharge duct simultaneously, improves the exhaust and the adhesive property of glued membrane, is favorable to the promotion of the manufacturing yield and the reliability of subassembly.

In order to realize the above object, the utility model provides a fire-retardant encapsulation glued membrane of high-gain down includes range upon range of high reflection polyolefin glued membrane layer, high fire-retardant EVA layer and high bonding resin layer in proper order from last, the upper surface of high reflection polyolefin glued membrane layer is equipped with a plurality of arcs, the surface subsides of arc has metal coating layer, the surface on metal coating layer is equipped with a plurality of reflectors that are the array form, the lower surface on high fire-retardant EVA layer is equipped with a plurality of horizontal recesses and vertical recess, the high bonding resin layer includes base member layer, horizontal fin and vertical fin, the position of horizontal fin and horizontal recess is corresponding, and keeps having the exhaust passage of predetermineeing the interval between the two, the position of vertical fin and vertical recess is corresponding, and keeps having the exhaust passage of predetermineeing the interval between the two.

Preferably, the metal coating layer is an aluminum zirconium alloy layer.

Preferably, the reflector is in a hexahedral structure, and the bottom surface of the reflector is distributed along the surface of the metal coating layer.

Preferably, the arc-shaped groove is of a hemispherical structure.

Preferably, the cross-sectional shapes of the transverse grooves and the longitudinal grooves are V-shaped structures, and the depths of the transverse grooves and the longitudinal grooves are 30-60 mu m.

Preferably, the height of the transverse ribs and the height of the longitudinal ribs are 20-30 μm.

Preferably, 10-30 μm exhaust channels are kept between the transverse convex ribs and the transverse grooves.

Preferably, 10-30 μm exhaust channels are kept between the longitudinal ribs and the longitudinal grooves.

The utility model discloses a technological effect and advantage:

(1) the upper layer adopts a high-reflection polyolefin adhesive film layer, adopts the design of an arc-shaped groove, is coated with a metal coating layer and is added with a polyhedral structure on the surface, thereby effectively increasing the light utilization rate and improving the conversion efficiency of the assembly;

(2) the lower surface of the high flame-retardant EVA layer is provided with the transverse groove and the longitudinal groove, so that the high flame-retardant EVA layer has an exhaust effect, and has the effects of improving adhesion, reducing the using amount of adhesive resin and reducing cost;

(3) during the subsequent lamination process, gas can be discharged along the transverse grooves and the longitudinal grooves, and meanwhile, the transverse convex ribs and the longitudinal convex ribs can be pressed and filled in the transverse grooves and the longitudinal grooves in the lamination process, so that holes are prevented from being formed in the groove structures, and the gas discharging and bonding performance of the adhesive film is improved.

Drawings

FIG. 1 is a schematic structural view of a middle-high gain flame retardant packaging adhesive film according to the present invention;

FIG. 2 is a side view of a middle-high gain flame retardant packaging adhesive film according to the present invention;

fig. 3 is a schematic structural view of the middle-high reflection polyolefin adhesive film layer of the present invention;

fig. 4 is a schematic structural view of a medium-high flame-retardant EVA layer of the present invention;

fig. 5 is a schematic structural view of a middle and high bonding resin layer according to the present invention.

The reference signs are: 100. a highly reflective polyolefin glue film layer; 110. a metal coating layer; 120. a reflector; 200. a highly flame retardant EVA layer; 210. a transverse groove; 220. a longitudinal groove; 300. a highly adhesive resin layer; 310. a transverse rib; 320. a transverse groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The high-gain flame-retardant packaging adhesive film shown in fig. 1-5 sequentially comprises a high-reflection polyolefin adhesive film layer 100, a high-flame-retardant EVA layer 200 and a high-adhesion resin layer 300 which are stacked from top to bottom.

In this embodiment, the upper surface of the highly reflective polyolefin adhesive film layer 100 is provided with a plurality of arc-shaped grooves, the surfaces of the arc-shaped grooves are covered with metal coating layers 110, the surfaces of the metal coating layers 110 are provided with a plurality of reflectors 120 in an array shape, wherein the metal coating layers 110 are preferably aluminum zirconium alloy layers, the reflectors 120 are in a hexahedral structure, and the bottom surfaces of the reflectors 120 are distributed along the surfaces of the metal coating layers 110.

The utility model discloses a high reflection polyolefin glued membrane layer adopts the design of arc wall, and it has metal coating layer and increases polyhedral structure at its surface to paste to cover, effectively increases the conversion efficiency of light utilization ratio promotion subassembly.

The lower surface of the high-flame-retardant EVA layer 200 is provided with a plurality of transverse grooves 210 and longitudinal grooves 220, the cross sections of the transverse grooves 210 and the longitudinal grooves 220 are V-shaped structures, and the depths of the transverse grooves 210 and the longitudinal grooves 220 are 30-60 mu m.

The lower surface on high fire-retardant EVA layer 200 is equipped with horizontal recess 210 and vertical recess 220, not only has the exhaust effect, plays simultaneously and improves the bonding, reduces bonding resin quantity, reduce cost's effect.

The high-flame-retardant EVA layer 200 is combined by organic and inorganic flame-retardant technologies, adopts a nitrogen-phosphorus intumescent flame retardant in combination with aluminum hydroxide and zinc borate to efficiently compound flame retardant, and greatly improves the flame retardant property of the EVA bonding layer by adding white inorganic filler.

The high adhesive resin layer 300 includes a base layer, transverse ribs 310 and longitudinal ribs 320, the transverse ribs 310 correspond to the transverse grooves 210 in position and maintain a predetermined interval of the air discharge passages therebetween, and the longitudinal ribs 320 correspond to the longitudinal grooves 220 in position and maintain a predetermined interval of the air discharge passages therebetween.

Wherein, the height of the transverse convex ribs 310 and the longitudinal convex ribs 320 is 20-30 μm; an exhaust channel of 10-30 μm is kept between the transverse convex rib 310 and the transverse groove 210; an exhaust channel with the diameter of 10-30 mu m is kept between the longitudinal convex ribs 320 and the longitudinal grooves 220.

During the subsequent lamination process, the gas can be exhausted along the transverse grooves 210 and the longitudinal grooves 220, and meanwhile, the transverse ribs 310 and the longitudinal ribs 320 can press down and fill the transverse grooves 210 and the longitudinal grooves 220 in the lamination process, so that holes are prevented from being formed in the groove structures, and the air exhaust and bonding performance of the adhesive film is improved.

The high-adhesion resin layer 300 adopts terpene resin, polyisobutylene resin, polybutylene and polyacrylic resin to ensure the adhesion property of the adhesive film and the back panel surface, and simultaneously adopts a blade coating mode to reduce the dosage of the adhesion resin and reduce the cost.

Finally, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a fire-retardant encapsulation glued membrane of high-gain, its characterized in that down includes range upon range of high reflection polyolefin glued membrane layer, high fire-retardant EVA layer and high bonding resin layer in proper order from last, the upper surface of high reflection polyolefin glued membrane layer is equipped with a plurality of arcs, the surface subsides of arc has metal coating layer, the surface on metal coating layer is equipped with a plurality of reflectors that are the array form, the lower surface on high fire-retardant EVA layer is equipped with a plurality of horizontal recesses and vertical recess, the high bonding resin layer includes base member layer, horizontal fin and vertical fin, the position of horizontal fin and horizontal recess is corresponding, and keeps having the exhaust passage of predetermineeing the interval between the two, the position of vertical fin and vertical recess is corresponding, and keeps there being the exhaust passage of predetermineeing the interval between the two.

2. The high-gain flame-retardant packaging adhesive film according to claim 1, wherein: the metal coating layer is an aluminum zirconium alloy layer.

3. The high-gain flame-retardant packaging adhesive film according to claim 1, wherein: the reflector is of a hexahedral structure, and the bottom surface of the reflector is distributed along the surface of the metal coating layer.

4. The high-gain flame-retardant packaging adhesive film according to claim 1, wherein: the arc-shaped groove is of a hemispherical structure.

5. The high-gain flame-retardant packaging adhesive film according to claim 1, wherein: the cross-sectional shapes of the transverse grooves and the longitudinal grooves are V-shaped structures, and the depths of the transverse grooves and the longitudinal grooves are 30-60 mu m.

6. The high-gain flame-retardant packaging adhesive film according to claim 5, wherein: the height of the transverse ribs and the height of the longitudinal ribs are 20-30 mu m.

7. The high-gain flame-retardant packaging adhesive film according to claim 6, wherein: an exhaust channel of 10-30 mu m is kept between the transverse convex ribs and the transverse grooves.

8. The high-gain flame-retardant packaging adhesive film according to claim 6, wherein: an exhaust channel of 10-30 mu m is kept between the longitudinal convex ribs and the longitudinal grooves.