CN115528125B - BIPV light assembly and preparation method thereof - Google Patents

BIPV light assembly and preparation method thereof Download PDF

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Publication number
CN115528125B
CN115528125B CN202211181680.2A CN202211181680A CN115528125B CN 115528125 B CN115528125 B CN 115528125B CN 202211181680 A CN202211181680 A CN 202211181680A CN 115528125 B CN115528125 B CN 115528125B
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metal foil
adhesive film
packaging adhesive
foil strip
bipv photovoltaic
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CN115528125A (en
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张恒
桂裕鹏
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Hubei Meige New Energy Technology Co ltd
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Hubei Meige New Energy Technology Co ltd
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    • 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
    • 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
    • H01L31/043—Mechanically stacked PV cells
    • 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
    • H01L31/049—Protective back sheets
    • 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
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • 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
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • 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
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/1804—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof comprising only elements of Group IV of the Periodic System
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]

Abstract

The invention discloses a BIPV light assembly and a preparation method thereof, wherein a metal foil strip, a packaging adhesive film strip, a transparent back plate, a back packaging adhesive film, a battery sheet layer, a front packaging adhesive film and a front film are sequentially laminated from bottom to top, and laminated and integrally formed through a laminating machine; the battery piece layer comprises a plurality of solar battery strings, and the metal foil strips and the packaging adhesive film strips are overlapped and placed in the direction perpendicular to the connection direction of the solar battery string welding strips and are positioned under the edge of the transparent backboard. The application adopts the metal foil strip to paste on the backplate to solve the welding strip reliability, the installation reliability and the water tightness problem of current subassembly.

Description

BIPV light assembly and preparation method thereof
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a BIPV light assembly and a preparation method thereof.
Background
Building Integrated Photovoltaic (BIPV) is a technology that integrates photovoltaic power generation technology into a building.
Solar energy is absorbed by a photovoltaic panel and converted into electric energy which is stored in a storage battery, so that the solar energy is used for household low-power electrical appliances, and the electricity load can be slowed down; meanwhile, solar power generation is a green, environment-friendly, sustainable and renewable energy source, and along with the shortage of energy sources, solar power generation technology is attracting more and more attention.
The trend of light and thin characteristic research of the light flexible photovoltaic module is gradually rising, the light flexible photovoltaic module is directly adhered to the tile surface of the roof by glue at present, and the tile surface is wavy, so that the adhesive bonding area is very limited. In addition, the reliability problem of solder strips present for non-glass photovoltaic modules is also present for lightweight modules.
Disclosure of Invention
The invention aims to: aiming at the problems and the defects existing in the prior art, the invention provides the BIPV photovoltaic light component which has a simple structure and is helpful for solving the problems in the prior art and the manufacturing method.
The specific technical scheme is as follows:
BIPV photovoltaic light assembly: the packaging method comprises the steps of sequentially laminating a metal foil strip, a packaging adhesive film strip, a transparent backboard, a back packaging adhesive film, a battery sheet layer, a front packaging adhesive film and a front film from bottom to top, and laminating the films through a laminating machine to form an integrated molding; the battery piece layer comprises a plurality of solar battery strings, and the metal foil strips and the packaging adhesive film strips are overlapped and placed in the direction perpendicular to the connection direction of the solar battery string welding strips and are positioned under the edge of the transparent backboard.
Further, the front film is a transparent organic polymer fluorine film with the thickness of 25-50 μm and the outer surface is provided with a hydrophobic coating.
Further, the length and width dimensions of the front film are both larger than 20 mm-40 mm of the transparent backboard;
further, the materials of the back packaging adhesive film, the front packaging adhesive film and the packaging adhesive film strips are any one of the following materials: POE, EVA, PVB.
Further, the length and width dimensions of the back packaging adhesive film are smaller than 30 mm-50 mm of the transparent backboard;
the length and width dimensions of the front packaging adhesive film are consistent with those of the transparent backboard;
the length and width dimensions of the packaging adhesive film strips are larger than or equal to those of the metal foil strips.
Further, the transparent back plate is of an FFC-PET-FFC or FFC-PET-PVF structure, wherein the thickness of PET is 275 mu m, the thickness of FFC coating ranges from 15 mu m to 25 mu m, and the thickness of PVF is 25 mu m.
Preferably, the metal foil strip is SUS410 stainless steel foil which is perpendicular to the arrangement direction of the battery strings, the thickness range of the SUS410 stainless steel foil is 0.1-0.5 mm, the thermal expansion coefficient is required to be smaller than the thermal expansion coefficient A of the welding strip, and the thermal expansion coefficient A of the welding strip is 16.5 x 10 -6 ·K -1 . Preferably, a coefficient of thermal expansion of less than 14 x 10 is required -6 ·K -1 。
Preferably, SUS410 stainless steel (thermal expansion coefficient about 12 x 10) -6 /K -1 ) Or other metallic material having a relatively low coefficient of thermal expansion. Other metal materials having a smaller expansion coefficient may be selected.
Further, the expansion stress F of the metal foil strip satisfies the following condition:
F＝δxh≥αεab
wherein δ is the elastic modulus of the metal foil strip; x is the length of the metal foil strip; h is the thickness of the metal foil strip; epsilon is the average elastic modulus of the rest of the BIPV photovoltaic lightweight assembly; a is the rest length of the BIPV photovoltaic lightweight assembly; b is the thickness of the rest of the BIPV photovoltaic lightweight assembly; alpha is a safety coefficient, and the range of alpha is more than or equal to 1.25 and less than or equal to 1.8.
Preferably, when the back packaging adhesive film and the front packaging adhesive film are made of thermosetting packaging materials, such as EVA, the value of alpha is relatively large, and can be 1.8.
When the back packaging adhesive film and the front packaging adhesive film are thermoplastic packaging materials, such as PVB, the value of alpha is smaller, and the value of alpha can be 1.25.
Further, the number of the metal foil strips is two, wherein the width of one metal foil strip M is 50-80 mm, and the width of the other metal foil strip N is more than or equal to 2 times of the width of the other metal foil strip M.
On the other hand, the invention also provides a preparation method of the BIPV photovoltaic light assembly, which comprises the following steps:
s1: sequentially paving a metal foil strip, a packaging adhesive film strip, a transparent backboard and a back packaging adhesive film on an operation table from bottom to top according to a laminated structure;
s2: placing a battery sheet layer on the paved back packaging adhesive film to finish bus connection, wherein the battery sheet layer comprises a plurality of solar battery strings, and metal foil strips and packaging adhesive film strips are superposed in a direction perpendicular to the connection direction of the solar battery string welding strips and are positioned under the edge of the transparent backboard;
s3: sequentially laying a front packaging adhesive film and a transparent organic polymer fluorine film on the battery sheet layer from bottom to top, laminating a metal foil strip, a packaging adhesive film strip, a transparent backboard, a back packaging adhesive film, the battery sheet layer, the front packaging adhesive film and a front film through a laminating machine, and integrally forming a BIPV photovoltaic light component;
s4: and (3) after the BIPV photovoltaic light assembly is subjected to laser cutting, junction box installation and performance testing, the BIPV photovoltaic light assembly is paved on a roof.
Further, tiling the BIPV photovoltaic lightweight assembly on a roof in S4 includes:
and (3) bonding the back surface of the BIPV photovoltaic light component by using a structural adhesive, overlapping the edge part of the metal foil strip of the BIPV photovoltaic light component with the protruding part of the metal foil strip of the adjacent BIPV photovoltaic light component, fixing the BIPV photovoltaic light component together by using screws, and the like, and installing all the BIPV photovoltaic light components on a roof.
Furthermore, the two metal foil strips are arranged at the edge of the back plate of the component processed according to the steps S1-S3, and the two metal foil strips have strong waterproof performance in the application process.
The beneficial effects are that: on the basis of the original photovoltaic light component, metal foil strips are added below two sides of the backboard, and the arrangement direction of the battery strings is kept perpendicular to the metal foil strips, so that the method is greatly helpful for the problem of reliability fracture of the welding strip; when the assembly is installed, the fixing between the metal foil strips enhances the installation stability of the assembly, and the waterproof performance of the assembly is greatly improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a BIPV photovoltaic lightweight assembly of the present application;
FIG. 2 is a schematic view of BIPV photovoltaic lightweight assembly installation of the present application;
FIG. 3 is a cross-sectional view of a metal strip in an embodiment of the present application;
wherein: 101. a front membrane; 102. packaging the adhesive film on the front surface; 103. a battery sheet layer; 104. packaging the adhesive film on the back; 105. a transparent back plate; 106. packaging the adhesive film strips; 107. a metal foil strip; 201. a metal foil strip 202, a metal foil strip; 203. a battery sheet layer; 204. a set screw; 301. a metal foil strip; 302. the rest part of the photovoltaic light component; x, length of metal foil strip; h. metal foil strip thickness; a. the rest part of the length of the photovoltaic light component; b. the thickness of the rest part of the photovoltaic light component.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Examples
As shown in fig. 1-3, an embodiment of the present invention provides a BIPV photovoltaic lightweight assembly comprising: the packaging film comprises a metal foil strip 107, a packaging film strip 106, a transparent back plate 105, a back packaging film 104, a battery sheet layer 103, a front packaging film 102 and a front film 101 which are sequentially laminated from bottom to top, and laminated and integrally formed through a laminating machine; the battery piece layer comprises a plurality of solar battery strings, and the metal foil strips and the packaging adhesive film strips are overlapped and placed in the direction perpendicular to the connection direction of the solar battery string welding strips and are positioned under the edge of the transparent backboard.
Preferably, the front film is a transparent organic polymer fluorine film with the thickness of 25-50 mu m, the outer surface is provided with a hydrophobic coating, and the light transmittance is more than 85%.
Preferably, the front film may be made of the same material as the transparent back plate, and may have the same size as the transparent back plate 105.
Preferably, the front packaging adhesive film 102, the back packaging adhesive film 104 and the packaging adhesive film strips 106 are made of one of EVA (ethylene-vinyl acetate copolymer), POE (polyolefin) and PVB (polyvinyl butyral Ding Quanzhi), and the gram weight EVA of the adhesive film is more than 400g/m 2 POE is more than 480g/m 2 。
Preferably, the cell layer comprises a plurality of solar cell strings, the cell strings are monocrystalline silicon cells, each cell is welded in series through tin-coated copper strips, and the thickness of the cell is 100-200 mu m.
Preferably, the transparent back plate 105 is one of FFC-PET-FFC and FFC-PET-PVF structures, and has a thickness of 0.3-0.35 mm, wherein the thickness of PET (polyethylene terephthalate) is 275 μm, the thickness of FFC coating is 15-25 μm, and the thickness of PVF (polyvinyl fluoride) is 25 μm.
Preferably, the metal foil strip is SUS410 stainless steel foil which is perpendicular to the arrangement direction of the battery strings, the thickness range of the SUS410 stainless steel foil is 0.1-0.5 mm, the thermal expansion coefficient is required to be smaller than the thermal expansion coefficient A of the welding strip, and the thermal expansion coefficient A of the welding strip is 16.5 x 10 -6 ·K -1 . Preferably, a coefficient of thermal expansion of less than 14 x 10 is required -6 ·K -1 。
Preferably, SUS410 stainless steel (thermal expansion coefficient about 12 x 10) -6 /K -1 ) Or other metallic material having a relatively low coefficient of thermal expansion. It should be noted that other metals having a smaller expansion coefficient may be selectedA material.
Further, the expansion stress F of the metal foil strip satisfies the following condition:
F＝δxh≥αεab
wherein δ is the elastic modulus of the metal foil strip; x is the length of the metal foil strip; h is the thickness of the metal foil strip; epsilon is the average elastic modulus of the rest of the BIPV photovoltaic lightweight assembly; a is the rest length of the BIPV photovoltaic lightweight assembly; b is the thickness of the rest of the BIPV photovoltaic lightweight assembly; alpha is a safety coefficient, and the range of alpha is more than or equal to 1.25 and less than or equal to 1.8.
The rest of the BIPV photovoltaic light module is the part which is cut by laser and does not include the metal foil strip.
Further, the number of the metal foil strips is two, wherein the width of one narrower metal foil strip M is 50-80 mm, and the width of the other metal foil strip N is more than or equal to 2 times of the width of the other metal foil strip M. The benefit of this design is that the width of N is relatively large, facilitating overlap with the relatively narrow metal foil strips of the adjacent BIPV photovoltaic lightweight modules.
The component to be laminated is fed into a laminating machine for lamination, and preferably comprises the following procedures:
(1) vacuumizing and dehumidifying
Conveying the component to be laminated to a vacuumizing chamber of the laminating machine through a conveying belt;
heating the heating table to 45-105 ℃ and keeping;
vacuumizing the upper vacuum chamber for 2-6 s until the pressure reaches 0.05-0.08MPa;
the upper cover is lowered for 10s;
vacuumizing the lower vacuum chamber for 1000-3000s until the pressure reaches 0.02-0.05MPa;
the lower vacuum cavity is inflated to normal pressure and kept for 2-5s;
the upper cover is lifted, and the lifting time is 10s.
(2) Lamination and curing:
delivering the component to be laminated to a lamination cavity chamber of a laminating machine;
vacuumizing the upper vacuum chamber for 2-8S to enable the pressure to reach 0.05-0.08MPa;
the upper cover is lowered for 10S;
vacuumizing the lower vacuum chamber for 60-360S to enable the pressure to reach 0.02-0.05MPa;
heating the heating table to 60-100 ℃ and continuously heating for 360S;
the upper vacuum chamber is inflated to 0.03MPa;
heating to 100-120deg.C, and maintaining;
the upper vacuum chamber is inflated to 0.05MPa for 300S;
heating the heating table to 120-160 ℃ and keeping;
the upper vacuum chamber is inflated to 0.08MPa;
vacuumizing the upper vacuum chamber for 1000-2400S;
the lower vacuum chamber is inflated to normal pressure, and the normal pressure is maintained for 2-5S;
the upper cover is lifted for 10S.
Further, the cooling in step S4 specifically includes:
conveying the laminated photovoltaic tile laminate to a cooling cavity chamber of a laminating machine;
vacuumizing the upper vacuum chamber for 2-8S to enable the pressure to reach 0.03-0.05MPa;
the upper cover is lowered for 10S;
inflating the upper vacuum chamber for 3-20S to make the pressure reach 0.06-0.08MPa, and keeping; heating to 115-160deg.C, and maintaining;
vacuumizing the lower vacuum chamber for 1000-3000S to make the pressure reach 0.03-0.05MPa;
the upper vacuum chamber is inflated to normal pressure and kept for 2-5S;
the upper cover is lifted for 10S.
And separating the laminated board from the operation table in the laminating machine, and sequentially performing EL detection, laser cutting, junction box assembly, insulation voltage resistance detection, IV detection and packaging.
The invention also provides a preparation method of the BIPV photovoltaic light assembly, which comprises the following steps:
s1: sequentially paving a metal foil strip, a packaging adhesive film strip, a transparent backboard and a back packaging adhesive film on an operation table from bottom to top according to a laminated structure;
s2: placing a battery sheet layer on the paved back packaging adhesive film to finish bus connection, wherein the battery sheet layer comprises a plurality of solar battery strings, and metal foil strips and packaging adhesive film strips are superposed in a direction perpendicular to the connection direction of the solar battery string welding strips and are positioned under the edge of the transparent backboard;
s3: sequentially laying a front packaging adhesive film and a transparent organic polymer fluorine film on the battery sheet layer from bottom to top, laminating a metal foil strip, a packaging adhesive film strip, a transparent backboard, a back packaging adhesive film, the battery sheet layer, the front packaging adhesive film and a front film through a laminating machine, and integrally forming a BIPV photovoltaic light component;
s4: and (3) after the BIPV photovoltaic light assembly is subjected to laser cutting, junction box installation and performance testing, the BIPV photovoltaic light assembly is paved on a roof.
Further, tiling the BIPV photovoltaic lightweight assembly on a roof in S4 includes:
and (3) bonding the back surface of the BIPV photovoltaic light component by using a structural adhesive, overlapping the edge part of the metal foil strip of the BIPV photovoltaic light component with the protruding part of the metal foil strip of the adjacent BIPV photovoltaic light component, fixing the BIPV photovoltaic light component together by using a fixing tool, and the like, and mounting all the BIPV photovoltaic light components on a roof. The fixing means comprise screws or rivets, etc.
The protruding portion of the metal foil strip of the adjacent BIPV photovoltaic light module refers to the protruding portion of the wider metal foil strip, and the narrower edge portion of the metal foil strip of the BIPV photovoltaic light module is overlapped.
Furthermore, the two metal foil strips are arranged at the edge of the back plate of the component processed according to the steps S1-S3, and the two metal foil strips have strong waterproof performance in the application process.
The BIPV photovoltaic module produced by the method has the advantage that the problem of the reliability of the welding strip can be greatly improved in practical application; in the actual installation process, the assembly can be more firmly installed in the environment such as a roof and the like; the metal foil strips are positioned at the edges of the assembly, so that the metal vapor transmittance is lower, and the water tightness of the assembly is greatly enhanced.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A BIPV photovoltaic lightweight assembly characterized by: the packaging method comprises the steps of sequentially laminating a metal foil strip, a packaging adhesive film strip, a transparent backboard, a back packaging adhesive film, a battery sheet layer, a front packaging adhesive film and a front film from bottom to top, and laminating the metal foil strip, the packaging adhesive film strip, the transparent backboard, the back packaging adhesive film, the battery sheet layer, the front packaging adhesive film and the front film into a whole through a laminating machine; the battery piece layer comprises a plurality of solar battery strings, and the metal foil strips and the packaging adhesive film strips are overlapped and placed in the direction perpendicular to the connection direction of the solar battery string welding strips and are positioned under the edge of the transparent backboard;
the front film is a transparent organic polymer fluorine film, the thickness is 25-50 mu m, the outer surface is provided with a hydrophobic coating, and the length and width dimensions are both larger than 20-40 mm of the transparent backboard;
the expansion stress F of the metal foil strip satisfies the following condition:
F＝δxh≥αεab
wherein δ is the elastic modulus of the metal foil strip; x is the length of the metal foil strip; h is the thickness of the metal foil strip; epsilon is the average elastic modulus of the rest of the BIPV photovoltaic lightweight assembly, the rest being the part excluding the metal foil strip; a is the rest length of the BIPV photovoltaic lightweight assembly; b is the thickness of the rest of the BIPV photovoltaic lightweight assembly;αas a safety factor, the safety factor of the device,αthe range of (2) is 1.25-1α≤1.8。
2. A BIPV photovoltaic light module according to claim 1, wherein: the back packaging adhesive film, the front packaging adhesive film and the packaging adhesive film strips are made of any one of the following materials: POE, EVA, PVB.
3. A BIPV photovoltaic light module according to claim 1, wherein:
the length and the width of the back packaging adhesive film are smaller than 30 mm-50 mm of the transparent backboard;
the length and width dimensions of the front packaging adhesive film are consistent with those of the transparent backboard;
the length and the width of the packaging adhesive film strip are larger than or equal to those of the metal foil strip.
4. A BIPV photovoltaic light module according to claim 1, wherein: the transparent backboard is in an FFC-PET-FFC or FFC-PET-PVF structure, wherein the thickness of PET is 275 mu m, the thickness range of FFC coating is 15-25 mu m, and the thickness of PVF is 25 mu m.
5. A BIPV photovoltaic light module according to claim 1, wherein: the material thermal expansion coefficient of the metal foil strip is less than 14-10 -6 ·K -1 The thickness range is 0.1mm to 0.5mm.
6. A BIPV photovoltaic light module according to claim 1, wherein: the number of the metal foil strips is two, the width of one narrower metal foil strip M is 50-80 mm, and the width of the other wider metal foil strip N is greater than or equal to 2 times of the width of the other narrower metal foil strip M.
7. The preparation method of the BIPV photovoltaic light assembly is characterized by comprising the following steps of:
s1: sequentially paving a metal foil strip, a packaging adhesive film strip, a transparent backboard and a back packaging adhesive film on an operation table from bottom to top according to a laminated structure;
s2: placing a battery sheet layer on the paved back packaging adhesive film to finish bus connection, wherein the battery sheet layer comprises a plurality of solar battery strings, and metal foil strips and packaging adhesive film strips are superposed in a direction perpendicular to the connection direction of the solar battery string welding strips and are positioned under the edge of the transparent backboard; the number of the metal foil strips is two, wherein the width of one narrower metal foil strip P is 50-80 mm, and the width of the other wider metal foil strip Q is more than or equal to 2 times of the width of the other narrower metal foil strip P;
the expansion stress F of the metal foil strip satisfies the following condition:
F＝δxh≥αεab
wherein δ is the elastic modulus of the metal foil strip; x is the length of the metal foil strip; h is the thickness of the metal foil strip; epsilon is the average elastic modulus of the rest of the BIPV photovoltaic lightweight assembly, the rest being the part excluding the metal foil strip; a is the rest length of the BIPV photovoltaic lightweight assembly; b is the thickness of the rest of the BIPV photovoltaic lightweight assembly;αas a safety factor, the safety factor of the device,αthe range of (2) is 1.25-1α≤1.8；
S3: sequentially laying a front packaging adhesive film and a transparent organic polymer fluorine film on the battery sheet layer from bottom to top, laminating a metal foil strip, a packaging adhesive film strip, a transparent backboard, a back packaging adhesive film, the battery sheet layer, the front packaging adhesive film and a front film through a laminating machine, and integrally forming a BIPV photovoltaic light component;
s4: and (3) after the BIPV photovoltaic light assembly is subjected to laser cutting, junction box installation and performance testing, the BIPV photovoltaic light assembly is paved on a roof.
8. The method of claim 7, wherein tiling the BIPV photovoltaic module on a roof in S4 comprises:
and bonding the back surface of the BIPV photovoltaic light assembly by using structural adhesive, overlapping the edge part of the relatively narrow metal foil strip of the BIPV photovoltaic light assembly with the protruding part of the relatively wide metal foil strip of the adjacent BIPV photovoltaic light assembly, fixing the BIPV photovoltaic light assembly together by using a fixing tool, and the like, and mounting all the BIPV photovoltaic light assemblies on a roof.
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Citations (1)

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Publication number Priority date Publication date Assignee Title
EP2629339A1 (en) * 2012-02-17 2013-08-21 Eppstein Technologies GmbH Film system for contacting photovoltaic cells

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CN114583000A (en) * 2022-03-18 2022-06-03 苏州零碳绿建新能源科技有限公司 Light photovoltaic module and preparation method thereof

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EP2629339A1 (en) * 2012-02-17 2013-08-21 Eppstein Technologies GmbH Film system for contacting photovoltaic cells

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