CN212967722U - Photovoltaic module is with encapsulation glued membrane and have its photovoltaic module - Google Patents
Photovoltaic module is with encapsulation glued membrane and have its photovoltaic module Download PDFInfo
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- CN212967722U CN212967722U CN202021678041.3U CN202021678041U CN212967722U CN 212967722 U CN212967722 U CN 212967722U CN 202021678041 U CN202021678041 U CN 202021678041U CN 212967722 U CN212967722 U CN 212967722U
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- photovoltaic module
- adhesive film
- packaging adhesive
- glued membrane
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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 discloses a photovoltaic module is with encapsulation glued membrane and photovoltaic module who has it, photovoltaic module includes with the encapsulation glued membrane: the packaging film comprises a central area and an outer edge area positioned on the outer side of the central area, and the outer edge area is formed by pre-curing. The utility model discloses photovoltaic module is with encapsulation glued membrane can improve the corner outward appearance ageing delaminating problem that brings because of photovoltaic module edge part is thin partially.
Description
Technical Field
The utility model belongs to the technical field of the photovoltaic product, especially, relate to a photovoltaic module is with encapsulation glued membrane and photovoltaic module who has it.
Background
Photovoltaic modules are important devices for converting solar energy into electrical energy using the photovoltaic effect. In the current society, the contradiction between the environment and energy is increasingly prominent, and among all new energy sources, solar energy has the characteristics of large reserves, renewability, environmental friendliness and the like, so that photovoltaic power generation becomes an important new energy development direction, and is favored by governments and organizations of various countries.
However, in practical applications, the service time of the photovoltaic module increases continuously along with the extension of outdoor service time, and the four corners of the photovoltaic module are subjected to bubble and delamination, the head and tail bus bar regions are delaminated, the long edges are delaminated along the edges of the battery pieces, and the like. The problem that the power is sharply reduced due to the black edges of the battery pieces at the edges and the like also occurs in the laboratory aging test. The exposure of the problems is related to the fact that the edge part pressure is large and the edge glue layer is thin in the laminating process of the photovoltaic module, and in order to solve the problem, each module manufacturer adopts the lamination with the frame or the corner protector, so that the problem that the edge part of the module is thin can be solved to a certain extent, but the lamination with the frame or the corner protector increases the steps of the production process, not only increases the labor cost, but also has complicated operation and influences the productivity.
In addition, in the laminating process, the incompletely cured packaging glue overflows and does not backfill to cause the problem of air bubbles or glue shortage at the edge of the assembly, and if the problem of glue overflow exists, the edge needs to be cut or the edge sealing adhesive tape needs to be used for processing, so that the cost is increased, the operation is complicated, and the productivity is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
In view of this, the utility model provides a photovoltaic module is with encapsulation glued membrane, this photovoltaic module is with encapsulation glued membrane can improve the corner outward appearance that brings because of photovoltaic module edge part is thin partially and delaminating problem that ages.
The utility model discloses still provide a photovoltaic module, this photovoltaic module structural integrity, anti erosion capacity is high, long service life.
According to the utility model discloses photovoltaic module is with encapsulation glued membrane of first aspect embodiment: the packaging film comprises a central area and an outer edge area positioned on the outer side of the central area, and the outer edge area is formed by pre-curing.
According to the utility model discloses encapsulation glued membrane for photovoltaic module, carry out edge precuring treatment through the encapsulation glued membrane more than the one deck, in precuring process, can prevent that the encapsulation of not fully solidifying is glued and is extruded and not backfill the photovoltaic module limit portion bubble or the starved problem that leads to in lamination process, effectively prevent overflow and glue, thereby can reduce the cost that the cut edge or use the banding sticky tape to bring, after carrying out the precuring, form cross-linked network structure, plasticity is high, be difficult for producing deformation, effectively improve photovoltaic module edge thin problem partially, and then improve the outer fringe district ageing delaminating problem that arouses because of photovoltaic module edge thin partially, not only simple process, high durability and convenient operation, labor cost is practiced thrift and yield and productivity are not influenced.
According to the utility model discloses photovoltaic module is with encapsulation glued membrane can also have following additional technical characterstic:
according to an embodiment of the invention, the outer edge zone is formed as an annular area surrounding and meeting the central zone.
According to the utility model discloses an embodiment, the encapsulation glued membrane forms into plate-shaped spare, the width in outer marginal zone is for being not less than 10 mm.
According to the utility model discloses an embodiment, the quantity of encapsulation glued membrane is the one deck and has added the ultraviolet curing agent and/or the thermosetting curing agent.
According to the utility model discloses an embodiment, the quantity of encapsulation glued membrane is two-layer, wherein the one deck the encapsulation glued membrane adds has ultraviolet curing and/or thermosetting curing agent, another layer it has the ultraviolet curing agent to add in the encapsulation glued membrane.
According to an embodiment of the present invention, the cross-linking degree of the outer edge area corresponding to the packaging adhesive film is 50% -75%.
According to the utility model discloses an embodiment, the encapsulation glued membrane is transparent or translucent, the thickness of encapsulation glued membrane is 100um-1000 um.
According to the utility model discloses an embodiment, the base member material of encapsulation glued membrane is electrical insulation resin, and its volume resistivity is greater than 1015Omega, cm, the range of the hot melting point is 40-180 ℃.
According to the utility model discloses photovoltaic module of second aspect embodiment, including any one of the above-mentioned embodiment photovoltaic module with encapsulating glued membrane.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of a layer of adhesive film of a packaging adhesive film for a photovoltaic module according to the present invention;
fig. 2 is a pre-curing apparatus of a packaging adhesive film for a photovoltaic module according to the present invention;
figure 3 is according to the utility model discloses a dual-glass photovoltaic module's structure chart.
Reference numerals:
a dual-glass photovoltaic assembly 100;
a packaging adhesive film 10;
a central region 11;
an outer edge region 12;
a glass plate 20;
a battery string 30;
a pre-curing device 40;
an ultraviolet light bar 41.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following first specifically describes the packaging adhesive film for photovoltaic module according to the embodiment of the present invention.
As shown in fig. 1: according to the utility model discloses photovoltaic module is with encapsulation glued membrane, include: at least one layer of packaging film 10.
Specifically, the packaging adhesive film 10 includes a central area 11 and an outer edge area 12 located outside the central area 11, and the outer edge area 12 is formed by pre-curing.
In other words, according to the utility model discloses photovoltaic module is with encapsulation glued membrane mainly comprises more than one deck encapsulation glued membrane 10, and encapsulation glued membrane 10 comprises central zone 11 and outer border district 12, and outer border district 12 is located the outside of central zone 11, and outer border district 12 needs to pass through the precuring processing.
It should be noted that, when the packaging adhesive film 10 is a single layer, the outer edge region 12 of the packaging adhesive film 10 is directly pre-cured, and when the packaging adhesive film 10 is two or more layers, the outer edge region 12 of the packaging adhesive film 10 after being compounded is pre-cured after completing the interlayer compounding of the multiple layers, and the method of interlayer compounding between the multiple layers of adhesive films is understood and easy to implement by those skilled in the art, and therefore, will not be described in detail.
From this, according to the utility model discloses the encapsulation glued membrane for photovoltaic module carries out marginal precuring processing through the encapsulation glued membrane 10 more than the one deck, in precuring process, can prevent that the encapsulation of not solidifying completely extrudes out photovoltaic module limit portion bubble or the starved problem that leads to not backfilling in lamination process, effectively prevent the excessive glue, thereby can reduce the cost that the cut edge or use the banding sticky tape to bring, after carrying out the precuring, form crosslinked network structure, plasticity is high, be difficult for producing deformation, effectively improve photovoltaic module edge thin problem partially, and then improve the marginal zone ageing delaminating problem that arouses because of photovoltaic module edge thin partially, not only simple process, high durability and convenient operation, labor cost is practiced thrift and yield and productivity are not influenced.
According to an embodiment of the present invention, the outer edge region 12 is formed as an annular region surrounding the center region 11 and meeting the center region 11, thereby ensuring the appearance and stability of the photovoltaic module.
In one embodiment of the present invention, the packaging adhesive film 10 is formed as a plate-shaped member, and the width of the outer edge region 12 is not less than 10 mm. The outer edge region 12 with the width not less than 10mm is arranged for pre-curing, so that the problem of edge region aging and delamination caused by the thinness of the edge of the photovoltaic module can be effectively solved.
As shown in fig. 2, the packaging adhesive film 10 is formed in a rectangular shape, the pre-curing device 40 can be configured as a box body matching the shape of the packaging adhesive film 10, and the four sides of the bottom of the box body are provided with ultraviolet light bars 41, and pre-curing is performed by irradiation of the ultraviolet light bars 41.
Optionally, the number of the packaging adhesive film 10 is one layer, and a uv curing agent and/or a thermal curing agent is added, and the curing manner adopted by the outer edge region 12 is uv curing and/or thermal curing.
Preferably, the number of the packaging adhesive films 10 is two, wherein one packaging adhesive film 10 is added with an ultraviolet curing and/or thermosetting curing agent, and the other packaging adhesive film 10 is added with an ultraviolet curing agent. During the subsequent curing of the central area 11 of the packaging adhesive film 10, an ultraviolet curing agent or a thermal curing agent is added into the packaging adhesive film 10, so that the curing time can be effectively shortened, and the curing efficiency can be improved.
It should be noted that, the package adhesive film 10 is first pre-cured in the outer edge region 12, and the pre-curing manner adopted in the outer edge region 12 is ultraviolet curing and/or thermal curing. When the edge region 12 is pre-cured by using two curing methods, i.e., uv curing and thermal curing, the curing methods may be performed first and then thermal curing, or thermal curing and then uv curing, or thermal curing and uv curing may be performed simultaneously.
The central area 11 is cured in the subsequent steps, curing agents are added into the packaging adhesive films 10 before curing, ultraviolet curing agents and/or thermosetting curing agents are added into the packaging adhesive films 10 when the packaging adhesive films 10 are one layer, ultraviolet curing agents and/or thermosetting curing agents are added into one packaging adhesive film 10 when the packaging adhesive films 10 are two layers, ultraviolet curing agents are added into the other packaging adhesive film 10, and the ultraviolet curing agents and the thermosetting curing agents are added in no sequence.
According to an embodiment of the present invention, the cross-linking degree of the outer edge region 12 corresponding to the packaging adhesive film 10 is 50% -75%. The packaging adhesive film 10 with the crosslinking degree of 50% -75% can ensure the thickness retentivity of the adhesive film and the adhesion with the back plate glass, and the adhesion performance of an interface cannot be influenced.
In an embodiment of the present invention, the packaging film 10 is a transparent or semitransparent member, and the thickness of the packaging film 10 is 100um-1000 um. The packaging adhesive film 10 is transparent or semitransparent, namely, the packaging adhesive film can transmit light, the thickness of the packaging adhesive film 10 is 100-1000 um, the lamination thickness is effectively controlled through establishment of the thickness, and the uniformity of the lamination thickness is guaranteed, so that the yield and the efficiency of packaging the packaging adhesive film for the whole photovoltaic module are improved.
According to an embodiment of the present invention, the packaging adhesive film 10 is electrically insulating resin with volume resistivity greater than 1015Omega, cm, the range of the hot melting point is 40-180 ℃. The electric insulation resin is adopted as the packaging adhesive film matrix, the electric insulation resin has good water resistance, low water vapor transmittance and large volume resistivity, the running safety and long-term aging resistance of the battery assembly in a high-temperature and high-humidity environment can be ensured, the service life of the photovoltaic assembly can be prolonged, the packaging adhesive film 10 subjected to hot melting treatment can be operated by simple devices and equipment, the preparation process is optimized when the hot melting point range is 40-180 ℃, and the preparation efficiency is improved.
Further, the electrical insulating resin is at least one material selected from polyolefin, ethylene-vinyl acetate copolymer, polyvinyl butyral, ionomer, polyurethane, silica gel, epoxy resin and ethylene propylene diene monomer. The material has good weather resistance and ultraviolet aging resistance, excellent heat resistance and low temperature resistance, and the service life of the photovoltaic module is prolonged.
According to the utility model discloses photovoltaic module, including foretell photovoltaic module with encapsulation glued membrane.
Because according to the utility model discloses photovoltaic module is with encapsulation glued membrane has above-mentioned technological effect, consequently, according to the utility model discloses photovoltaic module also has corresponding technological effect, and this photovoltaic module has complete structure promptly, and anti erosion capability is high, advantages such as long service life.
The following describes in detail the encapsulant film for photovoltaic module and the photovoltaic module having the encapsulant film according to the embodiment of the present invention with reference to specific embodiments.
Example 1:
the packaging film 10 is prepared by selecting a packaging material with polyolefin as a base material and using a conventional preparation method of a photovoltaic film, and the thickness of the film is about 500 um. The prepared packaging adhesive film 10 is cut according to the size requirement, and then ultraviolet pre-curing is carried out on the 10mm area of the outer edge of the cut film, wherein the curing crosslinking degree is 65%. As shown in fig. 1.
Comparative example 1:
the polyolefin substrate in the selected embodiment is prepared by a conventional preparation method of a photovoltaic film to obtain the packaging adhesive film 10 with the film thickness of about 500 um.
Comparative example 2:
the polyolefin substrate in the selected embodiment is prepared by a conventional preparation method of a photovoltaic film to obtain the packaging adhesive film 10 with the film thickness of about 500 um. The whole surface of the prepared packaging adhesive film 10 is subjected to ultraviolet precuring, and the curing crosslinking degree is 65%.
Using the adhesive films prepared in the examples, the comparative examples 1 and the comparative examples 2 to respectively manufacture a 60-cell dual-glass photovoltaic module 100, as shown in fig. 3, the 60-cell dual-glass photovoltaic module 100 includes two glass plates 20, two layers of encapsulation adhesive films 10 and a string of battery strings 30, wherein the thickness of each glass plate is 2mm, the thickness of each encapsulation adhesive film 10 is 0.5mm, the thickness of each battery string is 0.2mm, other materials are consistent, the edge thickness (unit mm) of the dual-glass photovoltaic module 100 is measured, and the measurement data are shown in table 1 below.
TABLE 1
| Point (unit mm) | Examples | Comparative example 1 | Comparative example 2 |
| 1 | 4.946 | 4.529 | 4.955 |
| 2 | 5.006 | 4.601 | 4.996 |
| 3 | 4.956 | 4.576 | 4.928 |
| 4 | 4.977 | 4.64 | 4.939 |
| 5 | 5.045 | 4.497 | 4.913 |
It should be noted that, since the sealant film 10 fills the gaps of the battery string, the thickness of the dual-glass photovoltaic module 100 is smaller than the thickness of the stacked sub-components before the assembly.
Comparing the data in table 1 found that: the thickness of the edge of the assembly laminated by the packaging adhesive film 10 of comparative example 1 is significantly thinner than that of the edge of the assembly laminated by the packaging adhesive films 10 of example and comparative example 2. However, in the module prepared in comparative example 2, since the whole surface of the packaging adhesive film 10 is subjected to ultraviolet pre-curing, the flowability of the adhesive film is poor, gaps cannot be completely filled, and a height difference appearance defect exists, so that the production yield of the product is reduced.
To sum up, according to the utility model discloses a photovoltaic module is with encapsulation glued membrane, carry out edge precuring treatment through the encapsulation glued membrane 10 more than the one deck, in precuring process, can prevent that the encapsulation that is not totally cured extrudes in lamination process and not backfill the photovoltaic module limit portion bubble or the starved problem that leads to, effectively prevent to overflow to glue, thereby can reduce the cost that the cut edge or use the banding sticky tape to bring, after carrying out precuring, form crosslinked network structure, plasticity is high, be difficult for producing deformation, effectively improve photovoltaic module edge thin problem partially, and then improve the marginal zone ageing delaminating problem that arouses because of photovoltaic module edge thin partially, not only simple process, and convenient for operation, and the cost of labor has been practiced thrift and not influenced yield and productivity. On the basis, the ultraviolet aging resistance, high adhesion and high curing efficiency of the packaging adhesive film material for the photovoltaic module are ensured by selecting materials, optimizing the thickness, the crosslinking degree and the curing agent, so that the yield and the productivity of the photovoltaic module are ensured, and the service life of the photovoltaic module is prolonged.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. The utility model provides a photovoltaic module is with encapsulation glued membrane which characterized in that includes:
the packaging adhesive film comprises a central area and a pre-cured outer edge area positioned outside the central area, and the pre-cured outer edge area is formed into an annular area which surrounds the central area and is connected with the central area.
2. The encapsulant film for photovoltaic module as claimed in claim 1, wherein the encapsulant film is formed in a plate-like shape, and the width of the outer edge region is not less than 10 mm.
3. The encapsulant film as claimed in claim 1, wherein the degree of cross-linking of the corresponding outer edge region of the encapsulant film is 50-75%.
4. The packaging adhesive film for photovoltaic modules as claimed in claim 1, wherein the packaging adhesive film is a transparent or translucent member, and the thickness of the packaging adhesive film is 100-1000 um.
5. The encapsulant film as claimed in claim 1, wherein the base material of the encapsulant film is an electrically insulating resin having a volume resistivity of more than 1015Omega, cm, the range of the hot melting point is 40-180 ℃.
6. A photovoltaic module comprising the encapsulant film for photovoltaic modules as claimed in claims 1 to 5.
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| CN202021678041.3U CN212967722U (en) | 2020-08-13 | 2020-08-13 | Photovoltaic module is with encapsulation glued membrane and have its photovoltaic module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111785802A (en) * | 2020-08-13 | 2020-10-16 | 常州汉韦聚合物有限公司 | Photovoltaic module is with encapsulation glued membrane and have its photovoltaic module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111785802A (en) * | 2020-08-13 | 2020-10-16 | 常州汉韦聚合物有限公司 | Photovoltaic module is with encapsulation glued membrane and have its photovoltaic module |
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