CN213861132U - Gridding adhesive film with interlayer and photovoltaic module - Google Patents
Gridding adhesive film with interlayer and photovoltaic module Download PDFInfo
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- CN213861132U CN213861132U CN202022347721.3U CN202022347721U CN213861132U CN 213861132 U CN213861132 U CN 213861132U CN 202022347721 U CN202022347721 U CN 202022347721U CN 213861132 U CN213861132 U CN 213861132U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides a latticed glued membrane and photovoltaic module with intermediate layer. The gridding adhesive film comprises: a first transparent adhesive film; a grid color layer; and the grid color layer is arranged between the first transparent adhesive film and the second transparent adhesive film. This application uses first transparent glued membrane and second transparent glued membrane to wrap up the net colour layer, has avoided net colour layer and photovoltaic module's solar wafer direct contact to utilize the cohesiveness of first transparent glued membrane or second transparent glued membrane to firmly bond solar wafer and transparent glued membrane. And because the hollow-out structure of the grid color layer enables most of the first transparent adhesive film and the second transparent adhesive film to be in direct contact, firm bonding of all layers of the whole grid adhesive film is realized. And then avoided the risk that the adhesion is not enough in the photovoltaic module application leads to the steam infiltration, encapsulating material delaminating to photovoltaic module's photoelectric conversion efficiency and life have effectively been guaranteed.
Description
Technical Field
The utility model relates to a photovoltaic technology field particularly, relates to a latticed glued membrane and photovoltaic module with intermediate layer.
Background
High conversion efficiency and low manufacturing cost have been sought goals for photovoltaic power generation. At present, because gaps exist among the cells, light irradiated at the gaps cannot be fully absorbed and utilized by the cells, and the cells can transmit light, so that energy loss is caused, and the efficiency of the photovoltaic module is lower than that of the cells. The white high-reflection back plate can enable light at partial gaps to be utilized, the back layer adhesive film is a white adhesive film, the back layer adhesive film can also enable partial light at the gaps to be utilized, and the power gain is higher than that of the white back plate. The principle is that light rays at the gap are reflected to the front layer of glass, reflected or even totally reflected at the interface between the glass and the air and finally emitted to the front side of the cell.
However, in the case of the double-sided battery, if the back layer is made of a white adhesive film, the back layer blocks all sunlight from the back surface, and the advantages of the double-sided battery cannot be obtained. Aiming at the problems, the gridding glue film is produced at the same time, the high reflection is arranged at the gap of the cell, the cell area is set to be transparent, the sunlight at the gap can be fully utilized, the back light is not shielded completely, and the cell is perfectly compatible with the double-sided cell.
In addition, the solar cell is usually black, and when the solar cell is packaged by using a transparent film, the gap between the solar cells is transparent, and in order to make the appearance of the formed double-sided battery uniform, a user selects to provide a black color layer at the gap between the solar cells, so that a black gridding adhesive film is produced.
The conventional gridding adhesive film is generally coated with corresponding coating or ink on the adhesive film by adopting screen printing, gravure printing, inkjet printing and other modes. Because the EVA adhesive film is not heat-resistant and is easily corroded by a solvent, the solvent type ink is limited in use, the UV ink can be used for printing on the surface of the EVA adhesive film due to the characteristics of no solvent and no need of heating, the water-based ink can be added with an alcohol solvent to adjust the drying time and the volatilization speed, and can also be used for printing on the surface of the EVA adhesive film, so that the preparation process of the gridding adhesive film is more energy-saving and environment-friendly.
However, after the pattern layer on the grid adhesive film is cured, the formed cross-linked network structure has poor adhesion to the battery piece, and in the subsequent application of the module, the risks of water vapor permeation and delamination of the packaging material exist, which affect the efficiency and the service life of the photovoltaic module.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a latticed glued membrane and photovoltaic module with intermediate layer to solve the not enough problem of adhesion of latticed glued membrane among the prior art to the battery piece.
In order to achieve the above object, according to an aspect of the present invention, there is provided a gridding adhesive film having an interlayer, the gridding adhesive film comprising: a first transparent adhesive film; a grid color layer; and the grid color layer is arranged between the first transparent adhesive film and the second transparent adhesive film.
Further, the grid color layer is a grid ink layer.
Further, the grid ink layer is a UV grid ink layer or a water-based grid ink layer.
Further, the first transparent adhesive film is a base film, and the second transparent adhesive film is a casting adhesive film.
Further, the thickness of the second transparent adhesive film is 30 to 400 μm.
Further, the thickness of the second transparent adhesive film is 30 to 200 μm.
Further, the thickness of the second transparent adhesive film is 30 to 100 μm.
Furthermore, the grid color layer is a white reflecting layer, and the thickness of the white reflecting layer is 10-150 μm.
Furthermore, the grid color layer is a white reflecting layer, and the thickness of the white reflecting layer is 10-100 μm.
Furthermore, the grid color layer is a white reflecting layer, and the thickness of the white reflecting layer is 20-80 μm.
Furthermore, the grid color layer is a black grid layer, and the thickness of the black grid layer is 3-100 μm.
Furthermore, the grid color layer is a black grid layer, and the thickness of the black grid layer is 3-50 μm.
Furthermore, the grid color layer is a black grid layer, and the thickness of the black grid layer is 5-30 μm.
Further, the thickness of the first transparent adhesive film is 100 to 800 μm.
Further, the thickness of the first transparent adhesive film is 100 to 600 μm.
Further, the thickness of the first transparent adhesive film is 200 to 500 μm.
Further, the first transparent adhesive film and the second transparent adhesive film are respectively independent pre-crosslinking layers.
Further, the first transparent adhesive film and the second transparent adhesive film are respectively a foaming adhesive film.
Further, the first transparent adhesive film and the second transparent adhesive film are respectively a polyethylene film, an EVA adhesive film, and a POE adhesive film.
According to the utility model discloses an on the other hand provides a photovoltaic module, and photovoltaic module includes front bezel, front glued membrane, solar wafer unit, the back glued membrane and the back layer packaging board of superpose in proper order, and this back glued membrane is any kind of above-mentioned latticed glued membrane, and the solar wafer of solar wafer unit corresponds the fretwork portion setting on the net colour layer of latticed glued membrane.
Use the technical scheme of the utility model, this application uses first transparent adhesive film and second transparent adhesive film to wrap up the net colour layer, has avoided net colour layer and photovoltaic module's solar wafer direct contact to utilize the cohesiveness of first transparent adhesive film or second transparent adhesive film to carry out firm bonding with solar wafer and transparent adhesive film. And because the hollow-out structure of the grid color layer enables most of the first transparent adhesive film and the second transparent adhesive film to be in direct contact, firm bonding of all layers of the whole grid adhesive film is realized. When the gridding adhesive film is applied to a photovoltaic module to encapsulate a solar cell unit, the firm bonding between the adhesive film and the solar cell and the firm bonding between the adhesive film layer structures can be avoided, and the risks of water vapor permeation and encapsulation material delamination caused by insufficient adhesive force in the application of the photovoltaic module can be avoided, so that the photoelectric conversion efficiency and the service life of the photovoltaic module can be effectively guaranteed.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic cross-sectional structure of a reticulated adhesive film with an interlayer according to an embodiment of the present invention; and
fig. 2 shows a schematic view of a split structure of a photovoltaic module according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a first transparent adhesive film; 20. a grid color layer; 30. a second transparent adhesive film;
1. a front plate; 2. a front glue film; 3. a solar cell unit; 4. a back glue film; 5. the back layer encapsulates the board.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first", "second", etc. are used to define the components, and are only used to facilitate the distinction of the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, should not be construed as limiting the scope of the present invention.
As analyzed by the background art of the present application, the grid layer of the grid adhesive film in the prior art has no adhesive force to the battery piece, so that the risk of water vapor permeation and delamination of the packaging material exists in the subsequent application of the assembly, and the photoelectric conversion efficiency and the service life of the photovoltaic assembly are affected. In order to solve the problem, the application provides a gridding adhesive film with an interlayer and a photovoltaic module.
In an exemplary embodiment of the present application, a gridding adhesive film having an interlayer is provided, as shown in fig. 1, the gridding adhesive film includes a first clear adhesive film 10, a grid color layer 20, and a second clear adhesive film 30, and the grid color layer 20 is disposed between the first clear adhesive film 10 and the second clear adhesive film 30.
This application uses first transparent glued membrane 10 and second transparent glued membrane 30 to wrap up net colour layer 20, has avoided net colour layer 20 and photovoltaic module's solar wafer direct contact to utilize first transparent glued membrane 10 or second transparent glued membrane 30's cohesiveness firmly to bond solar wafer and transparent glued membrane. And because the hollow structure of the grid color layer 20 makes most of the first transparent adhesive film 10 and the second transparent adhesive film 30 directly contact with each other, the firm bonding of each layer of the whole grid adhesive film is realized. When applying the gridding adhesive film of the application to the photovoltaic module to package the solar cell unit 3, because firm bonding of the adhesive film and the solar cell and firm bonding between adhesive film layer structures are avoided, the risk of water vapor permeation and package material delamination caused by insufficient adhesive force in the application of the photovoltaic module is avoided, and the photoelectric conversion efficiency and the service life of the photovoltaic module are effectively ensured.
The grid color layer 20 used in the gridding adhesive film of the present application may be a grid paint layer or a grid ink layer commonly used in the prior art. In order to simplify the process for preparing the mesh color layer 20, the mesh color layer 20 is preferably a mesh ink layer, which can be efficiently obtained by inkjet printing, screen printing, or gravure printing.
Further, in order to avoid environmental pollution caused by solvent volatilization and damage to the health of an operator, and to reduce heat consumption in the production of the meshed adhesive film layer, the meshed ink layer is preferably a UV meshed ink layer or a water-based paint meshed ink layer. The UV ink does not require solvent and does not require heating when printing or printing.
Since the prior art typically forms the grid separately by printing or printing, it is difficult to make it with a transparent adhesive film. Generally, a transparent adhesive film is firstly manufactured, and then a reflective material is printed or printed on the transparent adhesive film to form a grid color layer 20; next, another transparent adhesive film layer is disposed on the transparent adhesive film on which the grid color layer 20 is disposed. In this regard, it is preferable that the first transparent adhesive film 10 is a base film and the second transparent adhesive film 30 is a casting adhesive film, that is, the mesh color layer 20 is first disposed on the first transparent adhesive film 10, and the second transparent adhesive film 30 is disposed on the first transparent adhesive film 10 having the mesh color layer 20 by casting.
Based on the difference in the roles of the first transparent adhesive film 10 and the second transparent adhesive film 30, in general, the thickness of the first transparent adhesive film 10 as the base film is larger than the thickness of the second transparent adhesive film 30 formed by casting. In order to achieve sufficient coverage of the grid color layer 20 and achieve more sufficient bonding with the solar cell, the thickness of the casting adhesive film is preferably 30-400 μm, more preferably 30-200 μm, and further preferably 30-100 μm. The thickness of the second transparent adhesive film 30 is less than 30 μm, the preparation difficulty is high, the adhesion is easy to cause insufficient, the thickness of the second transparent adhesive film 30 is more than 400 μm, the light transmission is affected, and the reflectivity is reduced to a certain extent.
More preferably, the grid color layer 20 is a white reflective layer, the thickness of the white reflective layer is 10 to 150 μm, more preferably 10 to 100 μm, and even more preferably 20 to 80 μm, and when the thickness of the white reflective layer is less than 10 μm, the reflectance is likely to be insufficient; when the thickness of the white reflective layer is more than 150 μm, a part of the battery cell is easily shielded during packaging, resulting in reduction of the power of the module.
Or the grid color layer 20 is a black grid layer, and the thickness of the black grid layer is 3 to 100 μm, more preferably 3 to 50 μm, and further preferably 5 to 30 μm. The thickness of the black grid layer is less than 3 mu m, so that the insufficient reflectivity is easily caused; the thickness of the black mesh layer is more than 100 μm, the cost is increased, and the black mesh layer is easy to crack.
In one embodiment, the thickness of the non-casting film, such as the first transparent film 10, of the first transparent film 10 and the second transparent film 30 is 100 to 800 μm, more preferably 100 to 600 μm, and still more preferably 200 to 500 μm. The thickness of the first transparent adhesive film is less than 100 mu m, and the adhesive force is lower; the thickness of the second transparent adhesive film is larger than 800 μm, and the peeling strength with the back plate is too high, which affects the recovery of the back plate and causes the cost increase of the adhesive film.
The raw material for forming the white reflecting layer can be obtained by doping white reflecting pigment into UV ink in the prior art, the raw material for forming the black grid layer can be obtained by doping black pigment into UV ink in the prior art, and the white reflecting pigment and the black pigment can be selected from titanium dioxide, carbon black and the like in the prior art. When the grid adhesive film is applied to a photovoltaic module as a back adhesive film, lamination is required during packaging, and in order to avoid displacement or deformation of the set grid color layer 20 caused by excessive flow of the transparent adhesive film layer during lamination, the first transparent adhesive film 10 and the second transparent adhesive film 30 are preferably pre-crosslinked layers independently. The pre-crosslinking layer can preferably be realized by radiation crosslinking, and the UV gridding ink layer can be cured in the process.
The solar cell sheet surface in the solar cell sheet unit 3 of the photovoltaic module has protruding grid lines and electrodes, and the grid lines and the electrodes need to be electrically connected with each other by means of a circuit, and the protruding structures such as the grid lines and the electrodes can cause extrusion stress during lamination to cause the cell sheet to be hidden or broken. The compressibility of the foaming adhesive film is utilized to buffer the extrusion stress.
The first transparent adhesive film 10 and the second transparent adhesive film 30 used in the present application may be conventional transparent adhesive films for packaging in the field, may be single-layer films or multi-layer co-extruded films, and may be co-extruded by using different resin materials as main bodies when the multi-layer co-extruded films are formed, so as to form transparent adhesive film layers of various resin adhesive film combinations. In order to improve transparency and adhesion, the first transparent adhesive film 10 and the second transparent adhesive film 30 are preferably a polyethylene film, an EVA film, or a POE film, respectively.
In another exemplary embodiment of the present application, a photovoltaic module is provided, as shown in fig. 2, the photovoltaic module includes a front board 1, a front adhesive film 2, a solar cell unit 3, a back adhesive film 4 and a back packaging board 5, which are stacked in sequence, the back adhesive film 4 is a gridding adhesive film of any one of the above, and the solar cell of the solar cell unit 3 is disposed corresponding to a hollow-out portion of a grid color layer of the gridding adhesive film.
Because the back glued membrane 4 of this application uses first transparent glued membrane 10 and second transparent glued membrane 30 to wrap up grid colour layer 20, when setting up the fretwork portion on the grid colour layer that corresponds the grid glued membrane with the solar wafer in solar wafer unit 3, avoided grid colour layer 20 and photovoltaic module's solar wafer direct contact to utilize the cohesiveness of first transparent glued membrane 10 or second transparent glued membrane 30 to firmly bond solar wafer and transparent glued membrane. And because the hollow structure of the grid color layer 20 makes most of the first transparent adhesive film 10 and the second transparent adhesive film 30 directly contact with each other, the firm bonding of each layer of the whole back adhesive film 4 is realized. When the back adhesive film 4 of the application is applied to the photovoltaic module to encapsulate the solar cell unit 3, due to firm bonding of the adhesive film and the solar cell and firm bonding of the adhesive film layer structure, the risks of water vapor permeation and delamination of encapsulating materials caused by insufficient adhesive force in the application of the photovoltaic module are avoided, and the photoelectric conversion efficiency and the service life of the photovoltaic module are effectively guaranteed.
Preferably, the transparent adhesive film of the gridding adhesive film as the substrate layer is arranged close to the back plate, and the transparent adhesive film with a smaller thickness is arranged close to the solar cell.
The back packaging plate can be a back plate or back glass, and a person skilled in the art can select the back packaging plate according to actual product requirements, which is not described herein again.
The following describes a method for preparing a gridding adhesive film, so that those skilled in the art can apply the gridding adhesive film of the present application more conveniently.
First, a first transparent adhesive film 10 is formed by a melt extrusion film forming method, the first transparent adhesive film 10 may be a single-layer film or a co-extruded adhesive film, and besides the main body resin, a crosslinking agent, an auxiliary crosslinking agent, an antioxidant, an ultraviolet absorbent, a coupling agent, and the like may be added, and specific addition types and proportions may be selected by those skilled in the art according to the prior art, and are not described herein again.
Then, in the melt extrusion process of the first transparent adhesive film 10 or after the first transparent adhesive film 10 is pre-crosslinked, a reflective coating or a reflective ink or a black ink is disposed on the first transparent adhesive film 10 by means of screen printing, gravure printing, inkjet printing, and the like, and is cured to form a grid color layer 20, and at the same time, the first transparent adhesive film 10 on which the grid color layer 20 is disposed is wound at the other end. The reflective coating and the reflective ink adopted in the step can be made of materials existing in the prior art, and are not repeated. When the UV ink is set during the melt extrusion process of the first transparent adhesive film 10, the UV ink is cured by ultraviolet rays, and the first transparent adhesive film 10 is pre-crosslinked under the ultraviolet radiation.
Then, the first transparent adhesive film 10 with the grid color layer 20 is used as a cushion layer or a base film, wherein one side with the grid color layer 20 faces upwards, the raw material of the second transparent adhesive film 30 is arranged on the cushion layer in a casting manner, and the adhesive films formed by the first transparent adhesive film 10, the grid color layer 20 and the second transparent adhesive film 30 are rolled along with the casting. The second transparent adhesive film 30 may be a single-layer film or a multi-layer film, and may further include a cross-linking agent, an auxiliary cross-linking agent, an antioxidant, an ultraviolet absorbent, a coupling agent, etc. in addition to the main resin, and specific addition types and proportions may be selected by those skilled in the art according to the prior art, and will not be described herein again.
The gridding adhesive film can be pre-crosslinked after casting and before rolling, and also can be pre-crosslinked after rolling and before use. Preferably, radiation is used for pre-crosslinking.
The following provides a description of advantageous effects of the present application with reference to examples and comparative examples.
Example 1
The preparation method of the transparent substrate adhesive film comprises the following steps:
mixing: respectively weighing 100 parts by weight of EVA resin with the melt index of 5g/10min, the VA content of 20 and the melting point of 100 ℃, 1.5 parts of tert-butyl peroxycarbonate-2-ethylhexyl ester (organic peroxide initiator), 1.2 parts of 2-hydroxy-2-methylphenyl propane-1-ketone (photoinitiator), 1.2 parts of 1-hydroxycyclohexyl phenyl ketone (photoinitiator aid), 0.8 part of triallyl isocyanurate (crosslinking auxiliary agent), 0.7 part of ethylene triethoxysilane (tackifying coupling agent), 0.5 part of 2-hydroxy-4-n-octoxy benzophenone (light stabilizer) and 0.5 part of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant); uniformly mixing the components in a mixing kettle to obtain a mixture; the composition of the mixture is one common composition of transparent adhesive films in the prior art.
A film forming step: putting the mixture into a casting machine, and preparing a transparent EVA packaging adhesive film through plasticizing extrusion, casting, traction and rolling, wherein the thickness of the transparent EVA packaging adhesive film is 0.5 mm;
an ultraviolet lamp irradiation step: after the transparent EVA packaging adhesive film is irradiated by an ultraviolet lamp with the wave band of 300-400nm, the irradiation energy is 7000mj/cm, and the ultraviolet pretreatment type EVA transparent adhesive film with the latent crosslinking degree of 15% is obtained, namely the first transparent adhesive film.
The preparation method of the UV coating comprises the following steps:
adding 40 parts of polyurethane oligomer CN9028 (sartomer) and 10 parts of monomer IBOA into a reaction kettle, starting stirring, then adding 30 parts of pigment filler titanium R706 (DuPont in America), 2 parts of dispersant BYK163 (Germany BYK), 1 part of defoamer BYK066 (Germany BYK) and 1 part of thixotropic agent BYK 410 (Germany BYK), stirring at 3000rpm for 1-2 h at 30 ℃ to fully dissolve the pigment filler into the resin, adding 1 part of photoinitiator TPO into 15 parts of monomer HDDA, stirring and dissolving impurity-free particles at 60 ℃, finally adding the monomer in which the photoinitiator is dissolved into the reaction kettle, stirring for 15-25min under a vacuum state, discharging through 400-mesh filter cloth, and keeping out of the sun and freezing for storage. The composition of the UV coating is also a conventional UV coating composition.
The use method of the UV coating comprises the following steps:
coating corresponding paint or ink on the pre-crosslinked EVA transparent adhesive film by adopting a screen printing mode, wherein the thickness of the coating is 30 mu m, and irradiating and curing the coating by using a UV-led light source, wherein the radiation energy is 300-5000 mj/cm2And forming a grid adhesive film as a grid color layer after curing.
The preparation method of the tape casting transparent adhesive film comprises the following steps:
mixing: respectively weighing 100 parts by weight of EVA resin with the melt index of 5g/10min, the VA content of 20 and the melting point of 100 ℃, 1.5 parts of tert-butyl peroxycarbonate-2-ethylhexyl ester (organic peroxide initiator), 1.2 parts of 2-hydroxy-2-methylphenyl propane-1-ketone (photoinitiator), 1.2 parts of 1-hydroxycyclohexyl phenyl ketone (photoinitiator aid), 0.8 part of triallyl isocyanurate (crosslinking auxiliary agent), 0.7 part of ethylene triethoxysilane (tackifying coupling agent), 0.5 part of 2-hydroxy-4-n-octoxy benzophenone (light stabilizer) and 0.5 part of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant); uniformly mixing the components in a mixing kettle to obtain a mixture; the composition of the mixture is one common composition of transparent adhesive films in the prior art.
Casting: and putting the mixture into a casting machine, plasticizing, extruding, casting on a grid adhesive film, drawing and rolling to prepare a grid adhesive film, wherein the thickness of the casting adhesive film is 50 mu m, and the casting adhesive film is a second transparent adhesive film.
Example 2
The difference from example 1 is that the first transparent adhesive film has a thickness of 100 μm.
Example 3
The difference from example 1 is that the first transparent adhesive film has a thickness of 200 μm.
Example 4
The difference from example 1 is that the first transparent adhesive film has a thickness of 300 μm.
Example 5
The difference from example 1 is that the first transparent adhesive film has a thickness of 400 μm.
Example 6
The difference from example 1 is that the first transparent adhesive film has a thickness of 600 μm.
Example 7
The difference from example 1 is that the first transparent adhesive film has a thickness of 800 μm.
Example 8
The difference from example 1 is that the thickness of the mesh color layer is 10 μm.
Example 9
The difference from example 1 is that the thickness of the mesh color layer is 20 μm.
Example 10
The difference from example 1 is that the thickness of the mesh color layer is 50 μm.
Example 11
The difference from example 1 is that the thickness of the mesh color layer is 80 μm.
Example 12
The difference from example 1 is that the thickness of the mesh color layer is 100 μm.
Example 13
The difference from example 1 is that the thickness of the mesh color layer is 120 μm.
Example 14
The difference from example 1 is that the thickness of the mesh color layer is 150 μm.
Example 15
The difference from example 1 is that the second transparent adhesive film has a thickness of 30 μm.
Example 16
The difference from example 1 is that the second transparent adhesive film has a thickness of 8 μm.
Example 17
The difference from example 1 is that the thickness of the second transparent adhesive film is 100 μm.
Example 18
The difference from example 1 is that the second transparent adhesive film has a thickness of 150 μm.
Example 19
The difference from example 1 is that the second transparent adhesive film has a thickness of 200 μm.
Example 20
The difference from example 1 is that the second transparent adhesive film has a thickness of 300 μm.
Example 21
The difference from example 1 is that the second transparent adhesive film has a thickness of 400 μm.
Example 22
The difference from example 1 is that 30 parts of carbon black is added to the grid layer UV coating, and the thickness of the grid color layer is 3 μm.
Example 23
The difference from example 22 is that the thickness of the mesh color layer is 5 μm.
Example 24
The difference from example 22 is that the thickness of the mesh color layer is 10 μm.
Example 25
The difference from example 22 is that the thickness of the mesh color layer is 30 μm.
Example 26
The difference from example 22 is that the thickness of the mesh color layer is 50 μm.
Example 27
The difference from example 22 is that the thickness of the mesh color layer is 80 μm.
Example 28
The difference from example 22 is that the thickness of the mesh color layer is 100 μm.
Comparative example 1
Compared with the embodiment 1, the curtain coating transparent adhesive film is not arranged, the product formed after the UV coating is cured is the gridding adhesive film of the comparative example 1, the gridding layer is partially connected with the battery piece, and the gridding adhesive film has smaller binding force with the battery piece and the front adhesive film.
Comparative example data of the above examples are as follows
A sample preparation process: preparing a sample according to the structure of the solar component, sequentially laminating from top to bottom by using ultra-white glass, a transparent EVA (ethylene vinyl acetate) adhesive film, a double-sided battery piece, a grid adhesive film and a back plate (KPK), and laminating for 10min by using a laminating machine at the temperature of 145 ℃ and the vacuumizing time of 6 min. The second transparent adhesive film of the grid adhesive film is in contact with the battery piece, the first transparent adhesive film is in contact with the back plate, and the second transparent adhesive film is not arranged in the comparative example 1, so that the operation of contacting the second transparent adhesive film with the battery piece does not exist.
The test method comprises the following steps: the performance test was carried out according to GBT 29848 and 2013 ethylene-vinyl acetate copolymer (EVA) for photovoltaic module encapsulation. And testing the reflectivity of the assembly, the peeling strength of the rear adhesive film and the battery piece, the peeling strength of the rear adhesive film and the front adhesive film, and the peeling strength of the rear adhesive film and the back plate.
The results of the above tests are given in the following table:
the first transparent adhesive film in example 7 has the thickest thickness, so that the peel strength from the back sheet is the greatest, but it causes difficulty in recycling the back sheet later, and increases the cost of the adhesive film.
In example 14, the thickness of the adhesive grid film layer is too large, so that the edge of a part of the cell sheet is easily shielded during lamination, and the reflectivity is reduced.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
this application uses first transparent glued membrane and second transparent glued membrane to wrap up the net colour layer, has avoided net colour layer and photovoltaic module's solar wafer direct contact to utilize the cohesiveness of first transparent glued membrane or second transparent glued membrane to firmly bond solar wafer and transparent glued membrane. And because the hollow-out structure of the grid color layer enables most of the first transparent adhesive film and the second transparent adhesive film to be in direct contact, firm bonding of all layers of the whole grid adhesive film is realized. When the gridding adhesive film is applied to a photovoltaic module to encapsulate a solar cell unit, the firm bonding between the adhesive film and the solar cell and the firm bonding between the adhesive film layer structures can be avoided, the risk of water vapor permeation and encapsulation material delamination caused by insufficient adhesive force in the application of the photovoltaic module can be avoided, and the photoelectric conversion efficiency and the service life of the photovoltaic module can be effectively guaranteed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (20)
1. A gridding adhesive film with an interlayer is characterized in that the gridding adhesive film comprises:
a first transparent adhesive film (10);
a grid color layer (20); and
the grid color layer (20) is arranged between the first transparent adhesive film (10) and the second transparent adhesive film (30).
2. The gridding adhesive film according to claim 1, wherein the grid color layer (20) is a grid ink layer.
3. The reticulated glue film of claim 2, wherein the reticulated ink layer is a UV reticulated ink layer or a water-based reticulated ink layer.
4. The latticed adhesive film according to claim 1, wherein said first clear adhesive film (10) is a base film and said second clear adhesive film (30) is a cast adhesive film.
5. The gridding adhesive film according to claim 1, wherein the second transparent adhesive film (30) has a thickness of 30-400 μm.
6. The gridding adhesive film according to claim 5, wherein the second transparent adhesive film (30) has a thickness of 30-200 μm.
7. The gridding adhesive film according to claim 6, wherein the second transparent adhesive film (30) has a thickness of 30-100 μm.
8. The gridding adhesive film according to claim 1, wherein the grid color layer (20) is a white reflective layer, and the thickness of the white reflective layer is 10-150 μm.
9. The adhesive film for grid formation according to claim 8, wherein the thickness of the white reflective layer is 10-100 μm.
10. The waferized adhesive film of claim 9, wherein the white reflective layer has a thickness of 20-80 μm.
11. The gridding adhesive film according to claim 1, wherein the grid color layer (20) is a black grid layer, and the thickness of the black grid layer is 3-100 μm.
12. The gridding adhesive film according to claim 11, wherein the thickness of the black grid layer is 3-50 μm.
13. The gridding adhesive film according to claim 12, wherein the thickness of the black grid layer is 5-30 μm.
14. The gridded adhesive film according to any one of claims 1-13, wherein the first transparent adhesive film (10) has a thickness of 100-800 μm.
15. The gridding adhesive film according to claim 14, wherein the first transparent adhesive film (10) has a thickness of 100-600 μm.
16. The gridding adhesive film according to claim 15, wherein the first transparent adhesive film (10) has a thickness of 200-500 μm.
17. The latticed adhesive film according to claim 1, wherein said first transparent adhesive film (10) and said second transparent adhesive film (30) are each independently a pre-crosslinked layer.
18. The latticed adhesive film according to claim 1, wherein said first transparent adhesive film (10) and said second transparent adhesive film (30) are each independently a foamed adhesive film.
19. The latticed adhesive film according to claim 1, wherein said first transparent adhesive film (10) and said second transparent adhesive film (30) are each independently a polyethylene film, an EVA adhesive film, a POE adhesive film.
20. A photovoltaic module, photovoltaic module includes front bezel (1), front glued membrane (2), solar wafer unit (3), back glued membrane (4) and back layer packaging board (5) of superpose in proper order, characterized in that, back glued membrane (4) be the latticed glued membrane of any one of claims 1 to 19, the solar wafer of solar wafer unit (3) corresponds the fretwork portion setting of the net colour layer of latticed glued membrane.
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| CN202022347721.3U CN213861132U (en) | 2020-10-20 | 2020-10-20 | Gridding adhesive film with interlayer and photovoltaic module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115447245A (en) * | 2022-11-10 | 2022-12-09 | 苏州福斯特光伏材料有限公司 | Composite membrane and preparation method and application thereof |
| CN117038783A (en) * | 2023-08-01 | 2023-11-10 | 新源劲吾(北京)科技有限公司 | Manufacturing method for improving color front plate fastness |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115447245A (en) * | 2022-11-10 | 2022-12-09 | 苏州福斯特光伏材料有限公司 | Composite membrane and preparation method and application thereof |
| CN117038783A (en) * | 2023-08-01 | 2023-11-10 | 新源劲吾(北京)科技有限公司 | Manufacturing method for improving color front plate fastness |
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