CN211670198U - Packaging adhesive film with grid structure - Google Patents
Packaging adhesive film with grid structure Download PDFInfo
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- CN211670198U CN211670198U CN202020615173.5U CN202020615173U CN211670198U CN 211670198 U CN211670198 U CN 211670198U CN 202020615173 U CN202020615173 U CN 202020615173U CN 211670198 U CN211670198 U CN 211670198U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The utility model discloses a packaging adhesive film with grid structure. The utility model discloses a packaging adhesive film with grid structure includes from last to the first packaging adhesive film layer that sets gradually down, the stratum lucidum that has grid structure and second packaging adhesive film layer. The utility model discloses a packaging adhesive film with grid structure for when solar wafer, have high front and back generated power.
Description
Technical Field
The utility model belongs to encapsulation glued membrane field, concretely relates to encapsulation glued membrane with grid structure.
Background
The photovoltaic module is a core component for generating power by utilizing solar energy, and sequentially comprises toughened glass, a packaging adhesive film, a battery piece, a packaging adhesive film, glass or a polymer back plate from top to bottom. As technology advances, highly efficient battery pack formats continue to emerge, including double-sided batteries, half-pack assemblies, laminated assemblies, and the like. Among them, the double-sided battery module is now more and more widely used because of higher power generation. However, the light in the cell gaps is wasted, the cell gaps and the edge area account for about 10% of the whole assembly area, and how to generate electricity by using the light in the cell gaps becomes a difficult point and a hot point.
Because of the gaps between the cells in the photovoltaic module, if the back layers are made of the packaging material which is completely transparent to light, about 2% of sunlight is lost at the gaps between the cells. In order to solve the problem, various measures are taken in the industry to enhance the reflection of sunlight at the gaps of the battery pieces, such as a white glue film, a high-reflection back plate, high-reflection coated glass, an aluminized reflective strip and the like, but the industry has some problems, such as the existence of the white glue film and the high-reflection back plate enables the back of the assembly to be light-tight, the assembly cannot be applied to a high-efficiency double-sided battery assembly, the high-reflection coated glass has the problems of low reflectivity, low effective utilization rate of light and the like, the aluminized reflective strip has an insulating defect, the surface of aluminum is easily corroded to cause the reflectivity to be reduced, and.
CN109536072A discloses a grid-shaped high-reflection double-layer composite structure photovoltaic packaging adhesive film and application thereof, wherein the grid-shaped high-reflection double-layer composite structure photovoltaic packaging adhesive film is composed of a grid-shaped high-reflection layer and a transparent adhesive film, and the shape of the grid-shaped high-reflection layer corresponds to an area, not covered by a battery piece, in a photovoltaic module. The grid-shaped high-reflection double-layer composite structure photovoltaic packaging adhesive film disclosed by the invention is simple in preparation process, low in cost and excellent in performance, can be applied to packaging of a crystalline silicon battery assembly, and can be used for reflecting sunlight leaked from a non-battery piece area, enhancing the effective utilization rate of the sunlight, improving the power generation power of the assembly in unit area and reducing the power generation cost. The packaging adhesive film has a two-layer structure, namely, a grid-shaped high-reflection layer; and the latticed high-reflection layer is compounded on the transparent adhesive film in ink-jet printing, gravure printing, 3D printing and other modes. However, this method has certain disadvantages: the melting point of the high-reflection layer is not high; in addition, the melting point of the transparent adhesive film layer is not high and is far lower than the laminating temperature, so that the latticed high-reflection layer is easy to deform during high-temperature laminating, the latticed shape is deformed, and the expected effect cannot be achieved.
In addition, the packaging adhesive film in the prior art, whether being white grid glass or a white grid transparent back plate, can obviously improve the power generation power of the module. However, the white reflective layer is far away from the cell, and the power boosting effect of the module is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems of the prior art, and the purpose of the utility model is to provide a packaging adhesive film with a grid structure, which is used for high front and back power generation power when a solar cell is used.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model discloses a packaging adhesive film with grid structure, include from last to the first packaging adhesive film layer that sets gradually down, have grid structure's stratum lucidum and second packaging adhesive film layer.
The utility model discloses a packaging adhesive film with grid structure designs white grid structure on the glued membrane more nearly from the battery piece for when solar wafer, have high front generating power and back generating power.
The thickness of the first packaging adhesive film layer is 10-100 μm, for example, the thickness of the first packaging adhesive film layer is 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, and the like.
The first packaging adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer. The first packaging adhesive film layer can be used for being connected with the solar cell.
The transparent layer with the grid structure is a PET transparent layer, a PC transparent layer or a PMMA transparent layer and is used for reflecting sunlight. The size and the dimension of the grid structure can be flexibly designed, and the grid color can be selected from white or other colors according to the size of the battery and the design of the module type.
The thickness of the transparent layer with the grid structure is 10-100 μm, for example, the thickness of the transparent layer with the grid structure is 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, and the like.
The grid structure comprises vertical grid lines, wherein the vertical grid lines refer to grid lines in the same direction with the battery piece, and the grid structure can also comprise transverse grid lines perpendicular to the vertical grid lines. The size of the grid structure corresponds to the size of the solar cell and is related to the size of the solar cell and the module type.
Preferably, the lattice structure is composed of a plurality of unit cells, and each unit cell has a shape of a quadrangle, a hexagon or an octagon.
The second packaging adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer. The second packaging adhesive film layer is connected with the glass or the back plate.
Design white grid structure on the second encapsulation glued membrane layer that is closer from the battery piece, because the utility model discloses a grid structure is closer from the battery piece, and its subassembly generated power can further promote about 5 w.
The thickness of the second packaging adhesive film layer is 100-300 μm, for example, the thickness of the second packaging adhesive film layer is 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, 210 μm, 220 μm, 230 μm, 240 μm, 250 μm, 260 μm, 270 μm, 280 μm, 290 μm, 300 μm, and the like.
The utility model discloses a preparation method of encapsulation glued membrane with grid structure, including following step:
1) printing the grid pattern of the grid structure on the transparent layer by adopting a printing technology to obtain the transparent layer with the grid structure;
2) and (2) respectively laminating an adhesive film layer on the upper surface and the lower surface of the transparent layer with the grid structure obtained in the step 1).
In step 1), the printing technique is gravure printing, letterpress printing or screen printing.
The grid structure is made of fluorocarbon resin paint containing titanium dioxide;
preferably, the mass ratio of the titanium dioxide to the fluorocarbon resin is (40-60) - (60-40). For example, the mass ratio of the titanium dioxide to the fluorocarbon resin is 40:60, 45:55, 50:50, 55:45, 60:40 and the like.
Through the laminating process, the change of the grid size caused by the laminating process is avoided. The lamination process is a conventional technique in the art and is not described herein.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a packaging glued membrane with grid structure designs white grid structure on the glued membrane more closely from the battery piece, because grid structure is more closely from the battery piece, and its subassembly generating power can further promote about 5KW, and positive generating power is 302 and adds 308KW, and back generating power is 208 and adds 214 KW.
Drawings
Fig. 1 is a preferred embodiment of a grid structure in a packaging adhesive film with a grid structure according to the present invention;
fig. 2 is another preferred embodiment of the grid structure in the packaging adhesive film with grid structure of the present invention;
the reference numbers are as follows:
1-vertical grid line; 2-transverse grid line.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to fig. 1 and 2.
Unless otherwise specified, various starting materials of the present invention are commercially available or prepared according to conventional methods in the art.
One preferred scheme of the grid structure in the packaging adhesive film with the grid structure is shown in fig. 1, wherein the grid structure comprises a plurality of transverse grid lines 2 and vertical grid lines 1, and the size of the grid structure is consistent with that of the solar cell.
Another preferred embodiment of the grid structure in the packaging adhesive film with the grid structure is shown in fig. 2, wherein the grid structure comprises a plurality of vertical grid lines 1, and the size of the grid structure is consistent with that of the solar cell.
Example 1
The packaging adhesive film with the grid structure comprises a first packaging adhesive film layer, a transparent layer with the grid structure and a second packaging adhesive film layer which are sequentially arranged from top to bottom.
Wherein, the first packaging film layer is an EVA film layer with the thickness of 20 μm.
The transparent layer with the grid structure is a PET transparent layer with the thickness of 50 mu m and the grid structure, and the grid structure is consistent with the size of the battery component; wherein the grid structure is made of fluorocarbon resin paint containing titanium dioxide, and the mass ratio of the titanium dioxide to the fluorocarbon resin is 50: 50.
The second packaging adhesive film layer is an EVA adhesive film layer with the thickness of 150 mu m.
The preparation method of the packaging adhesive film with the grid structure in the embodiment comprises the following steps:
1) printing the grid pattern of the grid structure on the transparent layer by adopting a screen printing technology to obtain the transparent layer with the grid structure;
2) and (2) respectively laminating an adhesive film layer on the upper surface and the lower surface of the transparent layer with the grid structure obtained in the step 1).
The prepared packaging adhesive film with the grid structure is used for a solar cell, the prepared assembly comprises glass, a transparent PET adhesive film, a double-sided cell and a packaging adhesive film with the grid structure (the thickness of the first adhesive film layer is 20 mu m)/glass which are arranged from top to bottom in sequence, the generated power of the front side and the back side of the solar cell is tested, and the experimental result is shown in table 1.
Wherein the generated power test standard is carried out according to IEC 61215.
Example 2
The packaging adhesive film with the grid structure comprises a first packaging adhesive film layer, a transparent layer with the grid structure and a second packaging adhesive film layer which are sequentially arranged from top to bottom.
Wherein, the first packaging film layer is an EVA film layer with the thickness of 50 μm.
The transparent layer with the grid structure is a PET transparent layer with the thickness of 50 mu m and the grid structure, and the grid structure is consistent with the size of the battery component; wherein the grid structure is made of fluorocarbon resin paint containing titanium dioxide, and the mass ratio of the titanium dioxide to the fluorocarbon resin is 50: 50.
The second packaging adhesive film layer is an EVA adhesive film layer with the thickness of 150 mu m.
The preparation method of the packaging adhesive film with the grid structure in the embodiment comprises the following steps:
1) printing the grid pattern of the grid structure on the transparent layer by adopting a screen printing technology to obtain the transparent layer with the grid structure;
2) and (2) respectively laminating an adhesive film layer on the upper surface and the lower surface of the transparent layer with the grid structure obtained in the step 1).
The prepared packaging adhesive film with the grid structure is used for a solar cell, the prepared assembly comprises glass, a transparent PET adhesive film, a double-sided cell and a packaging adhesive film with the grid structure (the thickness of a first adhesive film layer is 50 mu m)/glass which are arranged from top to bottom in sequence, the generated power of the front side and the back side of the solar cell is tested, and the experimental result is shown in table 1.
Example 3
The packaging adhesive film with the grid structure comprises a first packaging adhesive film layer, a transparent layer with the grid structure and a second packaging adhesive film layer which are sequentially arranged from top to bottom.
Wherein, the first encapsulation glued membrane layer is 50 μm POE glued membrane layer.
The transparent layer with the grid structure is a PET transparent layer with the thickness of 50 mu m and the grid structure, and the grid structure is consistent with the size of the battery component; wherein the grid structure is made of fluorocarbon resin paint containing titanium dioxide, and the mass ratio of the titanium dioxide to the fluorocarbon resin is 50: 50.
The second packaging adhesive film layer is a POE adhesive film layer with the thickness of 150 mu m.
The preparation method of the packaging adhesive film with the grid structure in the embodiment comprises the following steps:
1) printing the grid pattern of the grid structure on the transparent layer by adopting a screen printing technology to obtain the transparent layer with the grid structure;
2) and (2) respectively laminating an adhesive film layer on the upper surface and the lower surface of the transparent layer with the grid structure obtained in the step 1).
The prepared packaging adhesive film with the grid structure is used for a solar cell, the prepared assembly comprises glass, a transparent PET adhesive film, a double-sided cell piece, a packaging adhesive film with the grid structure and glass, the transparent PET adhesive film, the double-sided cell piece and the packaging adhesive film with the grid structure are sequentially arranged from top to bottom, the power generation power of the front side and the back side of the solar cell is tested, and the experimental result is shown in table 1.
Example 4
The packaging adhesive film with the grid structure comprises a first packaging adhesive film layer, a transparent layer with the grid structure and a second packaging adhesive film layer which are sequentially arranged from top to bottom.
Wherein, the first packaging film layer is an EVA film layer with the thickness of 20 μm.
The transparent layer with the grid structure is a PC transparent layer with a thickness of 80 μm and a grid structure, and the grid structure is consistent with the size of the battery component; wherein the grid structure is made of fluorocarbon resin paint containing titanium dioxide, and the mass ratio of the titanium dioxide to the fluorocarbon resin is 60: 40.
The second packaging adhesive film layer is an EVA adhesive film layer with the thickness of 150 mu m.
The preparation method of the packaging adhesive film with the grid structure in the embodiment comprises the following steps:
1) printing the grid pattern of the grid structure on the transparent layer by adopting a screen printing technology to obtain the transparent layer with the grid structure;
2) and (2) respectively laminating an adhesive film layer on the upper surface and the lower surface of the transparent layer with the grid structure obtained in the step 1).
The prepared packaging adhesive film with the grid structure is used for a solar cell, the prepared assembly comprises glass, a transparent PET adhesive film, a double-sided cell piece, a packaging adhesive film with the grid structure and glass, the transparent PET adhesive film, the double-sided cell piece and the packaging adhesive film with the grid structure are sequentially arranged from top to bottom, the power generation power of the front side and the back side of the solar cell is tested, and the experimental result is shown in table 1.
Example 5
This embodiment is different from embodiment 1 in that the thickness of the transparent layer having the mesh structure is 200 μm, and the others are the same as those of embodiment 1.
Example 6
This embodiment is different from embodiment 1 in that the thickness of the transparent layer having the mesh structure is 5 μm, and the others are the same as those of embodiment 1.
Example 7
The difference between this embodiment and embodiment 1 is that the thickness of the first encapsulating film layer is 200 μm, and the rest is the same as that of embodiment 1.
Example 8
The present embodiment is different from embodiment 1 in that the thickness of the first encapsulating film layer is 5 μm, and the rest is the same as embodiment 1.
Comparative example 1
The difference between the comparative example and the example 1 is that the adopted common transparent PET adhesive film without the grid structure is used for the solar cell, the manufactured assembly comprises glass/transparent PET adhesive film/double-sided cell/transparent PET adhesive film/glass which are sequentially arranged from top to bottom, the generated power of the front side and the back side of the solar cell is tested, and the experimental result is shown in the table 1.
Comparative example 2
The difference between the comparative example and the example 1 is that the specific preparation method of the composite method is as follows instead of the lamination process:
and after the first packaging adhesive film layer and the second packaging adhesive film layer are extruded respectively to have the corresponding thickness, carrying out hot-pressing compounding on the first packaging adhesive film layer and the second packaging adhesive film layer and the transparent film with the grids in the middle.
TABLE 1
As can be seen from examples 1, 5, and 6 of table 1, the thickness of the transparent layer having the mesh structure affects the magnitude of the generated power gain, and the smaller the thickness, the larger the power gain, the thinner the transparent layer, the smaller the refraction of light, the smaller the loss of light, and the larger the power gain.
In examples 1, 7 and 8, the thickness of the first encapsulant film affects the magnitude of the generated power gain, the smaller the thickness is, the larger the power gain is, and the thickness of the first encapsulant film determines the distance between the reflective layer and the cell, and the shorter the distance is, the larger the power gain is.
The transparent PET adhesive film without the grid structure adopted in the comparative example 1 obviously reduces the power generation power of the front surface and the back surface.
The comparative example 2 does not adopt a film laminating process, adopts a conventional composite process for hot-pressing composite, and adopts the adhesive film prepared by the conventional composite process, so that the generated power of the front surface and the back surface of the solar cell piece is reduced.
The present invention is described in detail by the above embodiments, but the present invention is not limited to the above detailed process equipment and process flow, i.e. not meaning the present invention must rely on the above detailed process equipment and process flow to implement. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.
Claims (9)
1. The utility model provides a packaging adhesive film with grid structure which characterized in that includes from last first packaging adhesive film layer, the stratum lucidum that has grid structure and the second packaging adhesive film layer that sets gradually down.
2. The packaging adhesive film of claim 1, wherein the thickness of the first packaging adhesive film layer is 10-100 μm.
3. The packaging adhesive film of claim 1 or 2, wherein the first packaging adhesive film layer is an EVA adhesive film layer or a POE adhesive film layer.
4. The packaging adhesive film according to claim 1, wherein the transparent layer having a mesh structure is a PET transparent layer, a PC transparent layer or a PMMA transparent layer.
5. The packaging adhesive film according to claim 1, wherein the transparent layer having a mesh structure has a thickness of 10 to 100 μm.
6. The packaging adhesive film according to claim 1, wherein the lattice structure is composed of unit cells, and the unit cells are quadrilateral, hexagonal or octagonal in shape.
7. The packaging adhesive film of claim 1, wherein the grid structure has a size corresponding to that of the solar cell sheet.
8. The adhesive packaging film of claim 1, wherein the second adhesive packaging film is an EVA film or a POE film.
9. The packaging adhesive film of claim 1, wherein the thickness of the second packaging adhesive film layer is 100-300 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020615173.5U CN211670198U (en) | 2020-04-22 | 2020-04-22 | Packaging adhesive film with grid structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020615173.5U CN211670198U (en) | 2020-04-22 | 2020-04-22 | Packaging adhesive film with grid structure |
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| Publication Number | Publication Date |
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| CN211670198U true CN211670198U (en) | 2020-10-13 |
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| CN202020615173.5U Active CN211670198U (en) | 2020-04-22 | 2020-04-22 | Packaging adhesive film with grid structure |
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| CN (1) | CN211670198U (en) |
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- 2020-04-22 CN CN202020615173.5U patent/CN211670198U/en active Active
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Effective date of registration: 20221128 Address after: 828 Hengchang Avenue, Xianhua Street, Pujiang County, Jinhua, Zhejiang 322200 Patentee after: Zhejiang Saiwu Application Technology Co.,Ltd. Address before: 215200 no.369, Yegang Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee before: CYBRID TECHNOLOGIES Inc. |
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| TR01 | Transfer of patent right |