CN218241864U - Packaging adhesive film and photovoltaic module - Google Patents
Packaging adhesive film and photovoltaic module Download PDFInfo
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- CN218241864U CN218241864U CN202222241236.7U CN202222241236U CN218241864U CN 218241864 U CN218241864 U CN 218241864U CN 202222241236 U CN202222241236 U CN 202222241236U CN 218241864 U CN218241864 U CN 218241864U
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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
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Abstract
The utility model relates to a packaging adhesive film technical field especially relates to a packaging adhesive film and photovoltaic module, and packaging adhesive film includes that the middle part is regional and be located the tip region of the regional both sides in middle part, and the middle part is regional to be equipped with first knurling district, and the tip region is equipped with second knurling district, and the degree of depth in first knurling district is greater than the degree of depth in second knurling district. According to the technical scheme, the adhesive film grammes per square metre which can overflow from the end part area is arranged in the end part area of the packaging adhesive film in advance, the thickness of the end part area loss of the packaging adhesive film in the laminating process can be compensated, bubbles at the edge of the packaging adhesive film are reduced, and the hidden cracking risk of the edge of the cell piece and the risk of edge delamination of the photovoltaic module are reduced. The middle area is provided with a first embossing area with larger depth, so that a discharge channel can be provided for gas in the process of laminating the packaging adhesive film and the substrate, and the laminating effect between the packaging adhesive film and the substrate is ensured.
Description
Technical Field
The application relates to the technical field of packaging adhesive films, in particular to a packaging adhesive film and a photovoltaic module.
Background
Photovoltaic module includes single glass assembly and dual glass assembly, and in dual glass assembly, dual glass assembly is including glass, encapsulation glued membrane, battery piece, encapsulation glued membrane, the glass that lays in proper order, and the encapsulation glued membrane that adopts at present is generally that the surface is the homogeneity knurling or weight is the encapsulation glued membrane of homogeneity distribution.
In the encapsulation process of dual glass assembly, the dual glass assembly who will lay is put into the laminator, takes out the gas in the photovoltaic module through the evacuation, then heats and makes the encapsulation glued membrane melt and bond glass and battery piece together, and the dual glass assembly is taken out in the cooling at last.
Because the glass edge is in the excessive pressure state among the packaging process, the phenomenon of excessive membrane can appear in the part at packaging adhesive film edge, consequently leads to the thickness and the weight at packaging adhesive film edge to show and reduce easily, and glass is after the cooling, and there is the part of excessive pressure at the glass edge and can kick-back the roughness that keeps glass, and glass kick-backs the back, can appear packaging adhesive film edge and have the bubble, photovoltaic module edge delaminating scheduling problem, and steam also permeates the cell piece from the edge easily inside. With the continuous thinning of the packaging assembly, the thickness of the edge of the packaging adhesive film becomes lower, and the problems of air bubbles at the edge and the edge delamination of the photovoltaic assembly after the packaging adhesive film is laminated are more obvious.
SUMMERY OF THE UTILITY MODEL
In order to reduce the phenomenon that bubbles appear at the edge of the laminated packaging adhesive film and reduce the risk of edge delamination of a photovoltaic module, the application provides a packaging adhesive film and a photovoltaic module.
The application provides a packaging adhesive film and photovoltaic module adopts following technical scheme:
in a first aspect, the packaging adhesive film comprises a middle area and end areas located on two sides of the middle area, wherein the middle area is provided with a first embossing area, the end areas are provided with a second embossing area, and the depth of the first embossing area is larger than that of the second embossing area.
By adopting the technical scheme, the first embossing area and the second embossing area have different depth degrees, the gram weight of the glue film in the end area is larger than that of the glue film in the middle area, the gram weight of the glue film which can overflow from the end area is arranged in the end area of the packaging glue film in advance, the thickness of the end area loss of the packaging glue film in the laminating process can be compensated, the generation of bubbles at the edge of the packaging glue film is reduced, and the hidden cracking risk at the edge of the battery piece and the edge delamination risk of the photovoltaic module are reduced. The middle area is provided with a first embossing area with large depth, so that a discharge channel can be provided for gas in the process of attaching the packaging adhesive film and the substrate, and the attaching effect between the packaging adhesive film and the substrate is ensured.
Optionally, the thickness of the packaging adhesive film is 200-800 μm.
By adopting the technical scheme, the thickness of the packaging adhesive film is set to be in a moderate range, so that the phenomenon that the packaging adhesive film is too thin and easily causes adhesive shortage in the laminating process or the packaging adhesive film is too thick and causes higher cost and longer laminating time to reduce the production efficiency is avoided.
Optionally, the difference between the depth of the first embossed area and the depth of the second embossed area is 90 μm or more.
By adopting the technical scheme, the thickness loss of the end part area of the packaging adhesive film in the laminating process can be compensated.
Optionally, the depth of the first embossed area is 100-250 μm.
By adopting the technical scheme, on the premise that the depth of the first embossing area is greater than that of the second embossing area and the difference value is more than 90 microns, the depth of the first embossing area is set to be in a moderate range, so that the phenomenon that the gas in the first embossing area is too much due to the fact that the depth of the first embossing area is too large, and the gas is not discharged completely in the laminating process to form bubbles is avoided; the arrangement of the second embossing area is prevented from being influenced by the over-small depth of the first embossing area, and the compensation effect on the loss thickness of the end part area of the packaging adhesive film is not achieved.
Optionally, the second embossed region has a depth of 0.01 to 80 μm.
By adopting the technical scheme, on the premise that the depth of the first embossing area is greater than that of the second embossing area and the difference value is more than 90 micrometers, the depth of the second embossing area is set to be less than 80 micrometers, so that the phenomenon that the gas in the first embossing area is too much due to the fact that the depth of the first embossing area is too large as the depth of the second embossing area is too large, and the gas is not discharged completely to form bubbles in the laminating process is easily caused.
Optionally, the grammage of the end region is 10-200g/m2 heavier than the grammage of the central region.
By adopting the technical scheme, the gram weight of the end part area and the gram weight of the middle part area are controlled by adjusting the depths of the first embossing area and the second embossing area, and the gram weight difference value of the end part area and the gram weight difference value of the middle part area are set to be in a moderate range, so that the thickness loss of the end part area of the packaging adhesive film in the laminating process can be compensated.
Optionally, the width of the end region is 10-100mm in the direction in which one of the end regions extends towards the other end region.
By adopting the technical scheme, the width of the end part area is specifically set according to the size of the overpressure area, so that the thickness loss of the end part area of the packaging adhesive film in the laminating process can be compensated.
Optionally, the first embossing area and the second embossing area are arranged on one side surface of the packaging adhesive film.
By adopting the technical scheme, the processing is convenient, and the processing efficiency is improved.
Optionally, the first embossing area and the second embossing area are arranged on the surfaces of the two sides of the packaging adhesive film.
By adopting the technical scheme, the friction force between the packaging adhesive film and the adjacent substrate can be increased, the slippage of the packaging adhesive film on the substrate is reduced, and meanwhile, the adhesion between the packaging adhesive films is avoided.
Optionally, the thickness of the end regions is the same as the thickness of the central region.
Through adopting above-mentioned technical scheme for the most advanced of the first knurling district of same side and the most advanced of second knurling district are in the coplanar, can guarantee the holistic rolling roughness of packaging adhesive film.
In a second aspect, a photovoltaic module comprises the encapsulant film as described above.
By adopting the technical scheme, after the photovoltaic module is laminated, the thickness of the packaging adhesive film is basically consistent, the generation of bubbles at the edge of the packaging adhesive film is reduced, and the hidden crack risk at the edge of the cell is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the gram weight of the adhesive film overflowing from the end area is arranged in the end area of the packaging adhesive film in advance, so that the loss thickness of the end area of the packaging adhesive film in the laminating process can be compensated, the generation of bubbles at the edge of the packaging adhesive film is reduced, and the hidden cracking risk at the edge of the battery piece is reduced.
2. The middle area is provided with a first embossing area with large depth, so that a discharge channel can be provided for gas in the process of attaching the packaging adhesive film and the substrate, and the attaching effect between the packaging adhesive film and the substrate is ensured.
3. The depth of the first embossing area and the depth of the second embossing area are set to be in a moderate range, the phenomenon that the gas in the first embossing area is too much due to the fact that the depth of the first embossing area is too large, and the gas cannot be completely discharged in the laminating process to form bubbles is easily caused, the phenomenon that the depth of the first embossing area is too small to influence the arrangement of the second embossing area is avoided, and the compensation effect on the loss thickness of the end part area of the packaging adhesive film is not achieved.
4. The thickness of the end part area is the same as that of the middle part area, so that the tip of the first embossing area and the tip of the second embossing area on the same side are positioned on the same plane, and the integral rolling flatness of the packaging adhesive film can be ensured.
Drawings
Fig. 1 is a schematic structural diagram of a packaging adhesive film provided in the present application;
FIG. 2 is a side view of a packaging adhesive film in example 1 of the present application;
FIG. 3 is a side view of a packaging adhesive film in example 2 of the present application;
fig. 4 is a side view of a packaging adhesive film in example 3 of the present application.
Description of reference numerals: 100. packaging the adhesive film; 1. a middle region; 11. a first embossed area; 2. an end region; 21. a second embossed area.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a packaging adhesive film 100 and a photovoltaic module, wherein the photovoltaic module comprises the packaging adhesive film 100. Specifically, the photovoltaic module comprises glass, a packaging adhesive film 100, a battery piece, the packaging adhesive film 100 and the glass which are laid in sequence, and the packaging adhesive film 100 is melted by utilizing a laminating machine in the laminating and packaging process to bond the glass and the battery piece together.
Referring to fig. 1, the packaging adhesive film 100 includes a middle region 1 and end regions 2 located at both sides of the middle region 1, the middle region 1 is provided with a first embossed region 11, the end regions 2 are provided with second embossed regions 21, the depth of the first embossed region 11 is greater than that of the second embossed region 21, and the gram weight of the end regions 2 is greater than that of the middle region 1.
The first and second embossed regions 11 and 21 may have any embossed shape including, but not limited to, a well-shaped, pyramid-shaped, polygonal pyramid-shaped, prism-shaped, irregular protrusions, irregular frosting, weaving, or wave patterns. The embossing shapes of the first and second embossed zones 11, 21 may be the same or different. The first embossing area 11 and the second embossing area 21 can be disposed on one side of the packaging adhesive film 100, and can also be disposed on both sides of the packaging adhesive film 100, so that the adhesive force between the packaging adhesive film 100 and the substrate can be increased in the photovoltaic module laying process. The adhesive packaging film 100 may be, but is not limited to, a POE film, an EVA film, a PE film, or a co-extruded film.
By arranging the embossments with different depths, the gram weight of the adhesive film of the end region 2 is larger than that of the adhesive film of the middle region 1, the adhesive film which can overflow from the end region 2 is arranged in the end region 2 of the packaging adhesive film 100 in advance, the loss thickness of the end region 2 of the packaging adhesive film 100 in the laminating process can be compensated, the generation of bubbles at the edge of the packaging adhesive film 100 is reduced, and the hidden cracking risk at the edge of the cell piece and the edge delamination risk of the photovoltaic module are reduced.
The depth of the first embossing area 11 in the middle area 1 is large, so that a discharge channel can be provided for gas in the laminating process of the packaging adhesive film 100 and a substrate such as glass, a battery piece or a back plate, and the laminating effect between the packaging adhesive film 100 and the substrate is ensured. When the size of the photovoltaic module is large, the exhaust efficiency of the photovoltaic module in the laminating process can be increased, the exhaust time of the photovoltaic module is shortened, and the manufacturing yield and the reliability of the photovoltaic module are improved.
The encapsulant film 100 may be any color including, but not limited to, transparent, translucent, white, black, or colored. For example, when the packaging film 100 is a transparent film, it is convenient for the battery piece to fully absorb and utilize light. When the packaging adhesive film 100 is a white adhesive film, it can be used as a back adhesive film to reflect part of light in the gap region of the cell to the surface of the cell, thereby increasing the power of the photovoltaic module.
Referring to fig. 2, the width a of the end region 2 is 10 to 100mm in a direction in which the end region 2 extends toward the other end region 2. The width of the end region 2 is specifically set according to the size of the overpressure region, and the larger the overpressure region is, the larger the width of the end region 2 is, so as to ensure compensation of the thickness loss of the end region 2 of the packaging adhesive film 100 in the lamination process.
The packaging adhesive film 100 is too thin, which easily causes the shortage of adhesive in the laminating process, and too thick, which causes higher cost and longer laminating time and reduces the production efficiency, and preferably, the thickness b of the packaging adhesive film 100 is 200-800 μm.
The difference between the depth c of the first embossed region 11 and the depth d of the second embossed region 21 is greater than or equal to 90 μm, so that the thickness loss of the end region 2 of the packaging adhesive film 100 during lamination can be compensated.
The depth of the first embossing area 11 is too large, so that too much gas is in the first embossing area 11, and the phenomenon that the gas is not discharged completely in the laminating process to form bubbles is easily caused; too small a depth of the first embossing zone 11 affects the arrangement of the second embossing zone 21 without compensating for the loss of thickness in the end regions of the packaging adhesive film. Therefore, it is preferable that the depth c of the first embossed area 11 is 100 to 250 μm.
The second embossing area 21 having an excessively large depth may result in an excessively large depth of the first embossing area 11, which may cause a phenomenon in which the gas is not completely discharged during the lamination process to form bubbles. Therefore, it is preferable that the depth d of the second embossed region 21 is 0.01 to 80 μm.
The grammage of the end regions 2 and the central region 1 is controlled by adjusting the depths of the first and second embossed regions 11, 21, the grammage of the end regions 2 being 10-200g/m2 heavier than the grammage of the central region 1. The gram weight difference between the end region 2 and the middle region 1 is set to be in a moderate range, so that the thickness loss of the end region 2 of the packaging adhesive film 100 in the laminating process is compensated.
In the side of the packaging adhesive film 100 provided with the embossing, the tip of the first embossing area 11 and the tip of the second embossing area 21 are on the same plane, and the two sides of the packaging adhesive film 100 are parallel, so that the thickness of the end area 2 is the same as that of the middle area 1, and the overall rolling flatness of the packaging adhesive film 100 can be ensured.
Example 1
Referring to fig. 2, the thickness b of the packaging film 100 is 500 μm, one side of the packaging film 100 is a plane, the other side of the packaging film is provided with a first embossing area 11 and a second embossing area 21, and the first embossing area 11 and the second embossing area 21 have different embossing shapes, so that the processing is facilitated and the processing efficiency is improved. The tip of the first embossing area 11 and the tip of the second embossing area 21 are located on the same plane, and the two sides of the packaging adhesive film 100 are parallel, so that the thickness of the end area 2 is the same as that of the middle area 1, and the overall rolling flatness of the packaging adhesive film 100 can be ensured.
The depth c of the first embossing area 11 of the middle area 1 is 120 micrometers, the gram weight is 380g/m2, the first embossing area 11 comprises a plurality of pyramid structures which are arranged in an array mode, so that gas can be conveniently discharged in the laminating and curing process, the bonding strength of the packaging adhesive film 100 is improved, and the light transmittance of the packaging adhesive film can be improved after curing. The second embossing area 21 of the end area 2 has a depth d of 20 μm and a grammage of 430g/m2, and the second embossing area 21 is provided with frosted lines, which can reduce the slippage of the packaging adhesive film 100 on the substrate.
The knurling type and the knurling degree of depth of end area 2 and middle part area 1 are inconsistent, and the adhesion between the encapsulation glued membrane when having avoided the rolling of encapsulation glued membrane when high temperature season makes the product use more convenient, and when encapsulation glued membrane 100 carried out subsequent lamination operation together with the battery piece simultaneously, more difficult gassing. The thickness of the cross section of the laminated packaging adhesive film 100 is observed through a microscope, and the thickness of the laminated packaging adhesive film 100 is basically consistent.
Example 2
Referring to fig. 3, the difference between the embodiment 2 and the embodiment 1 is that the first embossed regions 11 and the second embossed regions 21 are disposed on both side surfaces of the packaging adhesive film 100, the first embossed regions 11 include a plurality of pyramid structures arranged in an array, and the embossed shapes of the second embossed regions 21 are frosted lines, so that the friction between the packaging adhesive film 100 and an adjacent substrate can be increased, the slippage of the packaging adhesive film 100 on the substrate can be reduced, and the adhesion between the packaging adhesive films 100 can be avoided.
Example 3
Embodiment 3 is different from embodiment 1 in that both side surfaces of the packaging adhesive film 100 are provided with a first embossed region 11 and a second embossed region 21. On one side surface of the packaging adhesive film 100, the first embossing area 11 and the second embossing area 21 have different embossing shapes, the first embossing area 11 includes a plurality of pyramid structures arranged in an array, and the second embossing area 21 has an embossing shape of a woven pattern; on the other side surface of the packaging adhesive film 100, the embossing shapes of the first embossing area 11 and the second embossing area 21 are the same, and are all woven patterns.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The packaging adhesive film is characterized by comprising a middle area (1) and end areas (2) located on two sides of the middle area (1), wherein a first embossing area (11) is arranged on the middle area (1), a second embossing area (21) is arranged on the end areas (2), and the depth of the first embossing area (11) is larger than that of the second embossing area (21).
2. Packaging adhesive film according to claim 1, characterized in that the thickness of the packaging adhesive film (100) is 200-800 μm.
3. Packaging adhesive film according to claim 2, characterized in that the difference between the depth of the first embossed area (11) and the depth of the second embossed area (21) is 90 μm or more.
4. Packaging adhesive film according to claim 3, characterized in that the depth of the first embossed area (11) is 100-250 μm.
5. Packaging adhesive film according to claim 3, characterized in that the depth of the second embossed zone (21) is 0.01-80 μm.
6. Packaging adhesive film according to any one of claims 1 to 5, characterized in that the grammage of the end region (2) is 10-200g/m2 heavier than the grammage of the central region (1).
7. Packaging film as claimed in any one of claims 1 to 5, wherein the width of the end regions (2) in the direction in which one of the end regions (2) extends towards the other end region (2) is 10-100mm.
8. Packaging adhesive film according to any one of claims 1 to 5, characterized in that one side surface is provided with the first embossed area (11) and the second embossed area (21) or both side surfaces are provided with the first embossed area (11) and the second embossed area (21).
9. Packaging adhesive film according to any one of claims 1 to 5, characterized in that the thickness of the end region (2) is the same as the thickness of the middle region (1).
10. A photovoltaic module, characterized in that it comprises an encapsulant film (100) as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222241236.7U CN218241864U (en) | 2022-08-23 | 2022-08-23 | Packaging adhesive film and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222241236.7U CN218241864U (en) | 2022-08-23 | 2022-08-23 | Packaging adhesive film and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218241864U true CN218241864U (en) | 2023-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222241236.7U Active CN218241864U (en) | 2022-08-23 | 2022-08-23 | Packaging adhesive film and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218241864U (en) |
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2022
- 2022-08-23 CN CN202222241236.7U patent/CN218241864U/en active Active
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