CN107833934B - Film for photovoltaic module, photovoltaic module and preparation method - Google Patents
Film for photovoltaic module, photovoltaic module and preparation method Download PDFInfo
- Publication number
- CN107833934B CN107833934B CN201711307015.2A CN201711307015A CN107833934B CN 107833934 B CN107833934 B CN 107833934B CN 201711307015 A CN201711307015 A CN 201711307015A CN 107833934 B CN107833934 B CN 107833934B
- Authority
- CN
- China
- Prior art keywords
- photovoltaic module
- layer
- film
- micropores
- cells
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000002360 preparation method Methods 0.000 title description 6
- 239000010410 layer Substances 0.000 claims abstract description 45
- 239000012790 adhesive layer Substances 0.000 claims abstract description 6
- 239000002344 surface layer Substances 0.000 claims description 15
- 229910000679 solder Inorganic materials 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 19
- 230000004907 flux Effects 0.000 abstract description 9
- 238000005476 soldering Methods 0.000 abstract description 9
- 238000004806 packaging method and process Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000004313 glare Effects 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001579 optical reflectometry Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/056—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means the light-reflecting means being of the back surface reflector [BSR] type
-
- 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
- Y02E10/52—PV systems with concentrators
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a film for a photovoltaic module and the photovoltaic module using the film, wherein the film for the photovoltaic module comprises an adhesive layer and a PET layer from bottom to top, and is only used for covering a welding strip on the photovoltaic module and/or a region between all battery pieces on the photovoltaic module. After the welding strip is covered by the film, EVA packaging is performed, and the PET plays a role in isolation, so that the soldering flux residues on the welding strip cannot be in direct contact with packaged EVA, and adverse effects caused by chemical reaction between the soldering flux residues and the packaged EVA are thoroughly eliminated.
Description
Technical Field
The invention relates to the field of photovoltaic cells, in particular to a film for a photovoltaic module, the photovoltaic module and a preparation method.
Background
The photovoltaic solder strip is applied to connection between photovoltaic module battery pieces, and plays an important role in conductive electricity collection. In order to ensure firm welding of the welding strip and the battery piece and prevent corrosion of the welding strip, the surface of the welding strip is coated with a tin layer, so that soldering flux residues are carried on the welding strip, and after the EVA packaging of the photovoltaic module is completed, the soldering flux residues are in direct contact with the EVA and undergo slow chemical reaction to generate bubbles, so that the quality of the whole photovoltaic module is reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a film for a photovoltaic module, the photovoltaic module and a preparation method.
In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
a film for a photovoltaic module comprising, from bottom to top, an adhesive layer and a PET layer, the film being used only to cover the solder strips on the photovoltaic module and/or the areas between the individual cells on the photovoltaic module.
After the welding strip is covered by the film, EVA packaging is performed, and the PET plays a role in isolation, so that the soldering flux residues on the welding strip cannot be in direct contact with packaged EVA, and adverse effects caused by chemical reaction between the soldering flux residues and the packaged EVA are thoroughly eliminated.
Preferably, the PET layer is black or a color with RGB three parameters equal to or less than 10. And the black PET is adopted, so that the light reflectivity of the assembly is reduced, and the pollution of glare to the environment is reduced.
Preferably, the PET layer comprises a base layer and a surface layer, wherein the surface layer is black or color with RGB three parameters equal to or less than 10.
Preferably, the surface layer is provided with a plurality of micropores, a transparent intermediate layer is further arranged between the base layer and the surface layer, and a reflecting layer is coated on one surface of the base layer, which is contacted with the intermediate layer.
Preferably, the micropores are arranged according to a rule.
In some embodiments, each set of micro-holes is regularly arranged along the length of the reflective film. For example, in a matrix arrangement, or in a staggered square or square succession arrangement, etc. According to different regional latitudes, the included angle between the axis of each group of micropores and the surface of the PET layer is properly adjusted according to the incident angle of sunlight, and meanwhile, the included angles of the two side surfaces of the prism on the base layer are correspondingly adjusted, so that sunlight can be reflected to the working area of the battery piece, wherein the included angles between the axis of the micropores of different groups and the surface of the PEY layer can be different, for example, the included angles are periodically changed, so that the reflection requirements of different sunlight in the morning, noon and afternoon are met. For example, further, the vertical micropores may be formed in a funnel shape, and the pore diameter thereof may be gradually reduced at the lower portion of the surface of the facing layer, so that the range of sunlight introduction may be increased. By utilizing the scheme, part of sunlight can be reflected, the utilization efficiency of the sunlight is improved, and meanwhile, the harsh requirements on glare pollution can be met, and the requirements of different application occasions are met.
The surface layer of the PET layer is provided with a plurality of micropores, for example, the micropores are arranged according to a matrix, a character outline or other regular and periodic arrangement, and sunlight passes through reflection light such as star light points of the micropores, so that glare pollution is eliminated, and aesthetic feeling is brought.
Preferably, the micropores are arranged in groups, and each group of micropores comprises a vertical micropore and a micropore inclined outwards from left to right.
Preferably, the base layer is provided with microprisms and is positioned below each group of micropores, the ridge line of each microprism is positioned right below the vertical micropore, and the two side surfaces of each microprism are respectively vertical to the axes of the two outwards inclined micropores.
Each group of micro-holes is communicated at the bottom, so that sunlight incident from any one micro-hole can be reflected from other micro-holes. When the microprism is arranged below the vertical micropores, sunlight vertically incident at noon can only be shot into the vertical micropores, then reflected out from the two inclined micropores by the two side surfaces of the microprism, and the reflected sunlight is reflected again by the packaging glass and can irradiate the working area of the battery piece, so that glare pollution is eliminated, the utilization rate of the sunlight is improved, and the solar energy conversion efficiency of the whole photovoltaic module is improved.
The invention also provides a photovoltaic module, which comprises a back plate module, a frame, a glass panel, a plurality of battery pieces, a welding strip connected to the surfaces of the battery pieces, and any one of the films for the photovoltaic module, wherein the films cover the welding strip and/or the area between the battery pieces on the photovoltaic module.
Preferably, both the battery plate and the frame have a black surface layer.
The invention also provides a preparation method of the photovoltaic module, which comprises the step of EVA packaging after the film for the photovoltaic module is used for covering the surface of the welding strip.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of another embodiment of the present invention.
Names of the corresponding parts indicated by numerals and letters in the drawings:
1-PET layer; 2-an adhesive layer; 11-surface layer; 12-a base layer; 13-an intermediate layer; 112-inclined microwells; 111-vertical microwells; 121-prism.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to achieve the object of the invention, as shown in fig. 1, a film for a photovoltaic module comprises an adhesive layer 2 and a PET layer 1 from bottom to top, wherein the film is only used for covering welding strips on the photovoltaic module and/or areas between battery pieces on the photovoltaic module.
After the welding strip is covered by the film, EVA packaging is performed, and the PET layer plays a role in isolation, so that soldering flux residues on the welding strip cannot be in direct contact with packaged EVA, and adverse effects caused by chemical reaction between the soldering flux residues and the packaged EVA are thoroughly eliminated. The adhesive layer may be a hot melt adhesive coating or other adhesive coating.
In some embodiments, to further achieve low glare characteristics, the PET layer is a color with black or RGB three parameters equal to or less than 10. And the black PET is adopted, so that the light reflectivity of the assembly is reduced, and the pollution of glare to the environment is reduced.
In some embodiments, the PET layer includes a base layer and a top layer that is a color having three parameters, black or RGB, equal to or less than 10.
As shown in fig. 2, in some embodiments, the surface layer 11 has a plurality of micropores, a transparent intermediate layer 13 is further disposed between the base layer 12 and the surface layer 11, and a surface of the base layer 12, which contacts the intermediate layer 13, is coated with a light reflecting layer.
Preferably, the micropores are arranged according to a rule.
Wherein, a plurality of micropores are arranged on the surface layer 11 of the PET layer, for example, the micropores are arranged according to a matrix, a character outline or other regular and periodic arrangement, and the reflected light such as starlight points of sunlight passing through the micropores can eliminate glare pollution and bring aesthetic feeling.
In the example shown in fig. 2, the microwells are arranged in groups, each group including one vertical microwell 111 and one microwell 112 inclined outward from left to right.
Meanwhile, a micro prism 121 may be disposed on the base layer and located under each group of micro holes, and the ridge line of the micro prism 121 is located right under the vertical micro hole 111, and two sides of the ridge line are respectively perpendicular to the axes of the two micro holes 112 that incline outwards.
Each group of micro-holes is communicated at the bottom, so that sunlight incident from any one micro-hole can be reflected from other micro-holes. When the microprism 121 is disposed under the vertical micro-hole 111, the sunlight vertically incident at noon can only be incident from the vertical micro-hole 111, and then reflected from the two inclined micro-holes 112 by the two sides of the microprism 121, and the reflected sunlight is reflected again by the packaging glass and can irradiate the working area of the battery piece, so that not only is the glare pollution eliminated, but also the utilization rate of the sunlight is improved, and the solar energy conversion efficiency of the whole photovoltaic module is improved.
The angle change of sunlight, which is refracted by the intermediate layer 13, needs to be calculated, so as to finally determine the angle of the inclined micropores 112.
If a multi-faceted tapered microprism is disposed below each set of microwells, and each side is not orthogonal to the vertical plane in which the axis of the perpendicular microwell lies (i.e., neither line perpendicular to a side is on that vertical plane). In this case, the number of inclined micropores is the same as the number of the side surfaces of the microprisms, and the inclination angle is determined by the angle of the corresponding side surfaces and the refractive index of the intermediate layer, so long as sunlight incident through the vertical micropores is ensured, reflected by the side surfaces of the tapered microprisms, and emitted from the inclined micropores corresponding to the side surfaces.
The invention also provides a photovoltaic module, which comprises a back plate module, a frame, a glass panel, a plurality of battery pieces, a welding strip connected to the surfaces of the battery pieces, and any one of the films for the photovoltaic module, wherein the films cover the welding strip and/or the area between the battery pieces on the photovoltaic module.
Preferably, both the battery plate and the frame have a black surface layer.
The invention also provides a preparation method of the photovoltaic module, which comprises the step of EVA packaging after the film for the photovoltaic module is used for covering the surface of the welding strip.
The photovoltaic module and the photovoltaic module prepared by the method can prevent the problems caused by the reaction of the soldering flux and the EVA packaging material, can further reduce the pollution of glare to the environment, and can beautify the environment and improve the utilization efficiency of sunlight if required.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, but not limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (7)
1. A film for a photovoltaic module, comprising, from bottom to top, an adhesive layer and a PET layer, said film being intended to cover only the solder strips on the photovoltaic module and/or the areas between the cells on the photovoltaic module; the PET layer comprises a base layer and a surface layer, wherein the surface layer is black or color with RGB three parameters equal to or less than 10; the surface layer is provided with a plurality of micropores, a transparent intermediate layer is arranged between the base layer and the surface layer, and a reflecting layer is coated on one surface of the base layer, which is contacted with the intermediate layer; the micropores are arranged in groups, and each group of micropores comprises a vertical micropore and a micropore which is inclined outwards from left to right.
2. The film for a photovoltaic module according to claim 1, wherein the PET layer is a color having three parameters of black or RGB equal to or less than 10.
3. The film for a photovoltaic module according to claim 2, wherein the micropores are regularly arranged.
4. A film for a photovoltaic module according to claim 3, wherein the base layer is provided with microprisms and located below each group of micropores, the ridges of the microprisms being located directly below the vertical micropores, and the two sides thereof being perpendicular to the axes of the two outwardly inclined micropores, respectively.
5. A photovoltaic module comprising a backsheet assembly, a frame, a glass panel, a plurality of cells, a solder strip attached to the surface of the cells, and a film for a photovoltaic module according to any one of claims 1 to 4, wherein the film covers the solder strip and/or the area between the cells on the photovoltaic module.
6. The photovoltaic module of claim 5, wherein the cells and frame each have a black skin.
7. A method for manufacturing a photovoltaic module, comprising the step of covering the surface of a solder strip with the film for a photovoltaic module according to any one of claims 1 to 4, and then performing EVA encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307015.2A CN107833934B (en) | 2017-12-11 | 2017-12-11 | Film for photovoltaic module, photovoltaic module and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307015.2A CN107833934B (en) | 2017-12-11 | 2017-12-11 | Film for photovoltaic module, photovoltaic module and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107833934A CN107833934A (en) | 2018-03-23 |
| CN107833934B true CN107833934B (en) | 2023-12-19 |
Family
ID=61642603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711307015.2A Active CN107833934B (en) | 2017-12-11 | 2017-12-11 | Film for photovoltaic module, photovoltaic module and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107833934B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863406A (en) * | 2017-12-11 | 2018-03-30 | 浙江宝利特新能源股份有限公司 | A kind of reflectance coating and photovoltaic module and preparation method for photovoltaic module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63241846A (en) * | 1987-03-30 | 1988-10-07 | Ise Electronics Corp | Heat-proof black electrode |
| CN102751344A (en) * | 2012-07-20 | 2012-10-24 | 合肥海润光伏科技有限公司 | Photovoltaic reflecting thin-film |
| CN206301822U (en) * | 2016-12-22 | 2017-07-04 | 苏州高德辰光电科技有限公司 | A kind of reflective membrane on photovoltaic module welding strip |
| CN107026213A (en) * | 2017-03-15 | 2017-08-08 | 横店集团东磁股份有限公司 | A kind of completely black efficient photovoltaic module |
| CN208400858U (en) * | 2017-12-11 | 2019-01-18 | 浙江宝利特新能源股份有限公司 | A kind of film and photovoltaic module for photovoltaic module |
-
2017
- 2017-12-11 CN CN201711307015.2A patent/CN107833934B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63241846A (en) * | 1987-03-30 | 1988-10-07 | Ise Electronics Corp | Heat-proof black electrode |
| CN102751344A (en) * | 2012-07-20 | 2012-10-24 | 合肥海润光伏科技有限公司 | Photovoltaic reflecting thin-film |
| CN206301822U (en) * | 2016-12-22 | 2017-07-04 | 苏州高德辰光电科技有限公司 | A kind of reflective membrane on photovoltaic module welding strip |
| CN107026213A (en) * | 2017-03-15 | 2017-08-08 | 横店集团东磁股份有限公司 | A kind of completely black efficient photovoltaic module |
| CN208400858U (en) * | 2017-12-11 | 2019-01-18 | 浙江宝利特新能源股份有限公司 | A kind of film and photovoltaic module for photovoltaic module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107833934A (en) | 2018-03-23 |
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