CN111293190A - Solar cell module and preparation method thereof - Google Patents

Solar cell module and preparation method thereof Download PDF

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Publication number
CN111293190A
CN111293190A CN202010080401.8A CN202010080401A CN111293190A CN 111293190 A CN111293190 A CN 111293190A CN 202010080401 A CN202010080401 A CN 202010080401A CN 111293190 A CN111293190 A CN 111293190A
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China
Prior art keywords
battery
main body
adhesive film
solar cell
local
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CN202010080401.8A
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Chinese (zh)
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CN111293190B (en
Inventor
陈斌
黄宗明
李令先
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Jingao Yangzhou New Energy Co ltd
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JA Solar Technology Yangzhou 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
    • H01L31/18—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
    • H01L31/04—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
    • H01L31/048—Encapsulation of modules
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The application discloses a solar cell module and a preparation method, belongs to the technical field of solar cells, and solves the problems that in the prior art, the edges of overlapping regions of cell pieces are prone to hidden cracking or even splitting due to the action of external force in the lamination process in the preparation process of the solar cell module and the edges of the overlapping regions of the cell pieces are inconvenient to process. The preparation method comprises the following steps: laying a first packaging adhesive film, a battery string, a second packaging adhesive film and a front cover plate on the rear cover plate in sequence to obtain a laminated piece; laminating the laminated piece to obtain a solar cell module; the battery string comprises a plurality of battery pieces which are connected in a head-to-tail overlapping mode; the first packaging adhesive film comprises a main body and a plurality of local bulges which are arranged on the main body and correspond to the overlapping area of the battery piece, and/or the second packaging adhesive film comprises a main body and a plurality of local bulges which are arranged on the main body and correspond to the overlapping area of the battery piece. The solar power generation device can be used for solar power generation.

Description

Solar cell module and preparation method thereof
Technical Field
The application relates to a solar cell, in particular to a solar cell module and a preparation method thereof.
Background
The technology of the solar cell module is mature, and a typical single-glass solar cell module mainly comprises glass, a first EVA layer, a cell string group, a second EVA layer and a back plate for packaging; typical dual glass assembly mainly includes glass, first EVA layer, battery cluster group, second EVA layer and glass encapsulation and forms.
At present, the technology for effectively improving the effective power generation area of a solar module mainly comprises the following steps: tiling, and stitch welding. Among the shingle technology and the stitch welding technology, the quantity of the battery pieces in the same size assembly is increased by overlapping the head and the tail of the adjacent battery pieces, so that the power generation efficiency is improved. Generally, adjacent battery plates are connected through conductive adhesive in the tiling technology, and adjacent battery plates are connected through solder strips in the stitch welding technology. Because adjacent battery pieces have a certain height difference, in the lamination and lamination processes in the preparation process of the solar battery assembly, the edges of the overlapping regions of the battery pieces are easy to crack or even split under the action of external force, which brings inconvenience to the preparation of the solar battery assembly and has potential safety hazards.
Disclosure of Invention
In view of the foregoing analysis, the present application aims to provide a solar cell module and a manufacturing method thereof, which solve the problems in the prior art that the edge of the cell overlapping region is prone to crack or even split due to external force during the lamination and lamination process in the solar cell module manufacturing process, and the processing is inconvenient.
The purpose of the application is mainly realized by the following technical scheme:
the application provides a preparation method of a solar cell module, which comprises the following steps: laying a first packaging adhesive film, a battery string, a second packaging adhesive film and a front cover plate on the rear cover plate in sequence to obtain a laminated piece; laminating the laminated piece to obtain a solar cell module; the battery string comprises a plurality of battery pieces which are connected in a head-to-tail overlapping mode; the first packaging adhesive film comprises a main body and a plurality of local bulges which are arranged on the main body and correspond to the overlapping area of the battery piece, and/or the second packaging adhesive film comprises a main body and a plurality of local bulges which are arranged on the main body and correspond to the overlapping area of the battery piece.
In one possible design, the local protrusions of the first packaging adhesive film are disposed on a surface of the main body of the first packaging adhesive film facing the battery string, and/or the local protrusions of the second packaging adhesive film are disposed on a surface of the main body of the second packaging adhesive film facing the battery string.
In one possible design, the cross-sectional shape of the local protrusions is square, rectangular, circular, diamond, trapezoidal or triangular.
In one possible design, the gram weight of the main body is 380-560 g/m2。
In one possible design, the gram weight of the local protrusions is 20-300 g/m2。
In one possible embodiment, a plurality of local projections extending in a direction perpendicular to the direction of extension of the battery string are connected to one another to form a strip-shaped continuous projection, and/or a plurality of local projections extending in the direction of extension of the battery string are connected to one another to form a strip-shaped continuous projection.
In one possible design, the plurality of local protrusions are arranged non-continuously.
In one possible design, the main body and the partial protrusion are integrally formed; alternatively, the main body and the local protrusion are separately provided.
In one possible design, two adjacent battery plates are connected by solder strips or conductive adhesive in each string of battery cells.
The application also provides a solar cell module which is prepared by adopting the preparation method.
The solar cell module comprises a rear cover plate, a first packaging adhesive film, a cell piece module, a second packaging adhesive film and a front cover plate which are sequentially stacked.
In one possible design, the battery string includes a plurality of battery pieces stacked end to end.
In one possible design, two adjacent cells in each string are connected by solder strips or conductive adhesive.
In one possible design, the first packaging adhesive film and/or the second packaging adhesive film is made of an EVA adhesive film or a POE adhesive film.
In one possible design, the EVA adhesive film comprises the following components in percentage by mass: 1.0-1.6 parts of peroxide initiator, 0.4-0.5 part of antioxidant, 0.1-0.3 part of light stabilizer, 3.0-4.5 parts of heat stabilizer, 0.5-0.7 part of tackifier, 1.0-3.0 parts of plasticizer, 0.3-0.6 part of coupling agent, 0.1-0.2 part of accelerator and the balance of EVA resin.
In one possible design, the peroxide is a mixture of diphenyl carbonate (DPC) and ketal peroxide, and the mass ratio of the diphenyl carbonate (DPC) to the ketal peroxide is controlled to be 2-4: 1.
in one possible design, the antioxidant is a hindered phenol antioxidant and a phosphite antioxidant, and the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is controlled to be 3-4: 1.
in one possible design, the light stabilizer comprises an ultraviolet absorber and a hindered amine stabilizer, and the mass ratio of the ultraviolet absorber to the hindered amine stabilizer is controlled to be 1-1.5: 1.
in one possible design, the heat stabilizer comprises an organic tin stabilizer, a composite stabilizer (calcium/zinc and barium/zinc composite soaps) and a rare earth stabilizer, and the mass ratio of the organic tin stabilizer to the composite stabilizer is controlled to be 1-1.5: 1-1.9: 1.
in one possible design, the tackifier is one or more of terpene resin, terpene-phenolic resin, poly-rosin, hydrogenated rosin, and pentaerythritol ester mixed in any proportion.
In one possible design, the plasticizer is dioctyl phthalate DOP, dibutyl phthalate DBP or diisononyl phthalate DINP.
In one possible design, the coupling agent is a silane coupling agent.
In one possible design, the accelerator is triallyl cyanurate, triallyl triisocyanate or trimethylolpropane trimethacrylate.
In one possible design, the POE adhesive film comprises the following components in percentage by mass: 0.5-2.0 parts of organic peroxide initiator, 0.5-2.5 parts of accelerator, 0.3-1.5 parts of tackifying coupling agent, 0.1-0.6 part of light stabilizer, 0.1-0.6 part of ultraviolet absorber, 0.05-0.2 part of light conversion additive and the balance of POE resin.
In one possible design, the main body comprises a plurality of strip-shaped transparent areas and a plurality of strip-shaped opaque areas which are alternately arranged, the surfaces of the transparent areas and the surfaces of the opaque areas are flush, the transparent areas correspond to the positions of the cell strings, and the opaque areas correspond to gaps among the cell strings.
In one possible design, the opaque area is a white area or a black area.
Compared with the prior art, the application can realize at least one of the following beneficial effects:
a) in the preparation method of the solar cell module, the main body is provided with the plurality of local bulges, the positions of the local bulges correspond to the stacking areas of the two adjacent cells in the solar cell module one to one, which is equivalent to increase the thickness of the packaging adhesive film at the stacking areas of the two adjacent cells, at the initial stage of the lamination of the solar cell module, the local bulges are utilized to support the stacking areas of the two adjacent cells, the stress at the edge of the stacking area of the cells is buffered, the risk of the cells cracking in the stacking and laminating processes of the solar cell module is greatly reduced, the reliability of the solar cell module is improved, the operation is simple, and the implementation and the popularization are easy.
b) According to the preparation method of the solar cell module, after the solar cell module is prepared, the local protrusions gradually deform due to high laminating temperature and enter the overlapping area of two adjacent cell slices or spread outwards, so that the height of the local protrusions is reduced, and the overall height of the solar cell module prepared by the preparation method is basically unchanged compared with the height of the existing solar cell module.
c) The preparation method of the solar cell module only increases the thickness of the packaging adhesive film at the overlapping area of the two adjacent cell slices, and does not need to increase the overall thickness of the packaging adhesive film, so that the use amount of the packaging adhesive film production material can be greatly reduced, and the overall production cost of the solar cell module is further reduced.
d) In the preparation method of the solar cell module, the gram weight of the main body is controlled to be 380-560 g/m2Within the range, the main body has enough thickness, and the production material consumption of the main body can be reduced on the basis of ensuring that the main body provides enough supporting force for the battery pieceThereby further reducing the overall production cost of the solar cell module; the gram weight of the local bulge is 20-300 g/m2The production material consumption of the local bulge can be reduced on the basis of ensuring that the local bulge can provide enough supporting force for the overlapping area of two adjacent battery pieces, so that the overall production cost of the solar battery assembly is further reduced.
e) In the solar module that this application provided, the encapsulation glued membrane adopts EVA glued membrane or POE glued membrane to make. The EVA adhesive film has high transparency, high adhesive force, low melting point, easy flowing and good durability, and can be suitable for various interfaces; POE is an ethylene-octylene copolymer, is a novel polyolefin thermoplastic elastomer which is developed by taking metallocene as a catalyst, has narrow relative molecular mass distribution and narrow comonomer distribution and controllable structure, has the characteristics of low water vapor permeability and high volume resistivity, ensures the safety and long-term aging resistance of the POE adhesive film in the high-temperature and high-humidity environment, and ensures that the POE adhesive film can be used for a long time.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the application, wherein like reference numerals are used to designate like parts throughout.
Fig. 1 is a schematic structural view of a solar cell encapsulation adhesive film provided in embodiment 1 of the present application;
fig. 2 is a schematic structural view of a solar cell encapsulation adhesive film provided in embodiment 2 of the present application;
fig. 3 is a front view of a solar cell packaging adhesive film provided in embodiment 2 of the present application;
fig. 4 is a schematic structural diagram of a laminated member in the method for manufacturing a solar cell module according to embodiment 3 of the present application;
fig. 5 is a top view of a laminate in a method of manufacturing a solar cell module according to example 3 of the present application;
fig. 6 is a schematic structural view of a laminated member in the method for manufacturing a solar cell module according to embodiment 4 of the present application;
fig. 7 is a top view of a laminate in the method for manufacturing a solar cell module according to example 4 of the present application.
Reference numerals:
1-a rear cover plate; 2-a first packaging adhesive film; 3-a battery piece; 4-welding a strip; 5-a second packaging adhesive film; 6-front cover plate; 7-a body; 8-local bulge.
Detailed Description
The preferred embodiments of the present application will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the application serve to explain the principles of the application.
The present application provides a method for manufacturing a solar cell module, referring to fig. 1 to 7, comprising the steps of:
step S1: a first packaging adhesive film 2, a battery string, a second packaging adhesive film 5 and a front cover plate 6 are sequentially laid on the rear cover plate 1 to obtain a laminated piece;
step S2: and laminating the laminated piece to obtain the solar cell module.
Wherein, the battery cluster includes a plurality of battery pieces 3 that connect with end to end overlapping mode. In addition, in the present application, the number of the battery strings may be plural.
The first adhesive packaging film 2 and/or the second adhesive packaging film 5 adopt the adhesive packaging films with the local protrusion 8 structure shown in fig. 1 to 3. Specifically, the packaging adhesive film with the local protrusion 8 structure comprises a main body 7 and a plurality of local protrusions 8 which are arranged on the main body 7 and correspond to the overlapping areas of the battery pieces 3.
Compared with the prior art, in the preparation method of the solar cell module, the used packaging adhesive film is the packaging adhesive film with the plurality of local protrusions 8 corresponding to the overlapping areas of the cell pieces 3, so that the thickness of the packaging adhesive film at the overlapping areas of the two adjacent cell pieces 3 is increased, at the initial stage of laminating the solar cell module, the local protrusions 8 are used for supporting the overlapping areas of the two adjacent cell pieces 3 to buffer the stress at the edges of the overlapping areas of the cell pieces 3, and therefore the risk that the cell pieces 3 are cracked in the laminating and laminating processes of the solar cell module is greatly reduced, the reliability of the solar cell module is improved, the operation is simple, and the method is easy to implement and popularize.
Meanwhile, after the solar cell module is manufactured, the local protrusions 8 gradually deform due to high laminating temperature and enter the overlapping area of two adjacent cell slices or spread outwards, so that the height of the local protrusions 8 is reduced, and the overall height of the solar cell module manufactured by the manufacturing method is basically unchanged compared with the overall height of the existing solar cell module.
In addition, the thickness of the packaging adhesive film at the stacking area of the two adjacent battery pieces is only increased, the whole thickness of the packaging adhesive film is not required to be increased, the use amount of the packaging adhesive film production materials can be greatly reduced, and the whole production cost of the solar battery assembly is further reduced.
In the embodiment of the present application, the local protrusions 8 corresponding to the overlapping regions of the battery plates 3 can be understood as follows: at least a part of the partial protrusion 8 overlaps at least a part of the overlapping region of the battery sheet 3 in the width direction along the overlapping region of the battery sheet 3 (i.e., in the extending direction of the battery string). The width of the local protrusions 8 may be the same as the width of the overlapping area of the battery plate 3, or may be slightly larger than the width of the overlapping area of the battery plate 3. Preferably, the width of the local protrusion 8 is slightly larger than the width of the overlapping area of the battery piece 3, and the overlapping area of the battery piece 3 is located in the middle of the local protrusion 8.
In the preparation method provided by the embodiment of the application, the local protrusion 8 of the first packaging adhesive film 2 may be arranged on the surface of the main body 7 of the first packaging adhesive film facing the battery string, or on the surface of the main body 7 of the first packaging adhesive film facing away from the battery string; the local protrusions 8 of the second packaging adhesive film 5 may be provided on the surface of its body 7 facing the battery string, or on the surface of its body 7 facing away from the battery string. In addition, when the first adhesive packaging film 2 and the second adhesive packaging film 5 both have the structure of the local protrusions 8, the local protrusions 8 of both may face the battery string, or the local protrusions 8 of both may face away from the battery string, or the local protrusion 8 of one of the two faces the battery string, and the local protrusion 8 of the other faces away from the battery string.
The sectional shape of the local protrusion 8 along the plane of the main body 7 is square, rectangular, circular, diamond, trapezoid or triangular, and in practical applications, the sectional shape of the local protrusion 8 can be selected according to practical situations. It should be noted that, from the viewpoint of uniform stress and manufacturing, the sectional shape of the local protrusion 8 along the plane of the main body 7 is square or rectangular.
Illustratively, the cross-sectional shape of the local protrusion 8 in the direction perpendicular to the plane of the main body 7 may be square, rectangular, circular, trapezoidal, etc., and may be selected according to practical situations.
In order to ensure the sufficient thickness of the main body 7, the gram weight of the main body 7 is controlled to be 380-560 g/m2In the range (e.g. 380 g/m)2、390g/m2、400g/m2、410g/m2、420g/m2、430g/m2、440g/m2、450g/m2、460g/m2、470g/m2、480g/m2、490g/m2、500g/m2、510g/m2、520g/m2、530g/m2、540/m2、550g/m2、560g/m2Etc.), the gram weight of the main body 7 is limited in the above range, so that the main body 7 has enough thickness, and the production material consumption of the main body 7 can be reduced on the basis of ensuring that the main body 7 provides enough supporting force for the cell 3, thereby further reducing the overall production cost of the solar cell module.
Similarly, in order to further improve the support stability of the stacking region of two adjacent battery plates 3, the gram weight of the local protrusions 8 is 20-300 g/m2(e.g., 20 g/m)2、40g/m2、50g/m2、60g/m2、80g/m2、100g/m2、120g/m2、140g/m2、150g/m2、160g/m2、180g/m2、200g/m2、220g/m2、240g/m2、250g/m2、260g/m2、280g/m2、300g/m2Etc.), the gram weight of the local protrusion 8 is limited in the above range, so that the production material consumption of the local protrusion 8 can be reduced on the basis of ensuring that the local protrusion 8 can provide enough supporting force for the overlapping area of two adjacent battery plates 3, thereby further reducing the overall production cost of the solar battery assembly.
The following two arrangements are adopted for the above-described local protrusions 8.
First, from the viewpoint of processing and production, the plurality of local protrusions 8 perpendicular to the extending direction of the battery string (located in the same row) are connected to each other to form a strip-shaped continuous protrusion, and/or the plurality of local protrusions 8 perpendicular to the extending direction of the battery string (located in the same row) are connected to each other to form a strip-shaped continuous protrusion, so that the number of processes for the local protrusions 8 can be reduced, and only a small number of strip-shaped protrusions need to be processed.
Secondly, from the perspective of saving production materials, the plurality of local protrusions 21 are independently and discontinuously arranged to form discontinuous protrusions, and compared with the first arrangement mode, the second arrangement mode can save production materials between two adjacent local protrusions 8, so that the overall production cost of the solar cell module is reduced.
It should be noted that, the main body 7 and the local protrusion 8 are integrally formed; alternatively, the main body 7 and the partial protrusion 8 may be separately manufactured and separately processed, and then bonded with an adhesive.
In the preparation method provided by the embodiment of the application, the adjacent battery sheets 3 of the battery string are connected through the solder strip 4 or the conductive adhesive.
It is understood that in the manufacturing method provided by the present application, steps of sorting solar cells, cutting materials, forming a solar cell string, and the like may be included before stacking in step S1, and for a solar cell module using sliced cells, a slicing step may be further included before forming a solar cell string during manufacturing, so as to divide a whole solar cell into a certain proportion of sliced cells.
In the lamination process of step S1, after the battery string is placed on the first packaging adhesive film 2, the welding of the bus bar is required, and a plurality of battery strings are connected (the bus bar is provided with a lead terminal); then, a second packaging adhesive film 5 and a front cover plate 6 are laid, openings are formed in preset positions of the second packaging adhesive film 5 and the front cover plate 6, and leading-out ends of the bus bars are led out from the openings of the second packaging adhesive film 5 and the front cover plate 6 and are used for being connected with a junction box subsequently.
The steps of trimming the assembly, mounting the frame, mounting the junction box and the like are also included after the lamination in the step S2.
The application also provides a solar cell module which is prepared by adopting the preparation method and comprises a rear cover plate 1, a first packaging adhesive film 2, a cell string, a second packaging adhesive film 5 and a front cover plate 6 which are sequentially stacked.
Compared with the prior art, the beneficial effects of the solar cell module provided by the application are basically the same as those of the preparation method of the solar cell module, and are not repeated herein.
Specifically, the battery string includes a plurality of battery pieces 3 stacked end to end, and two adjacent battery pieces 3 are connected by a solder strip 4 or a conductive adhesive. The battery cells 3 are, for example, full cells or sliced cells.
For the first packaging adhesive film 2 and/or the second packaging adhesive film 5, it is made of EVA adhesive film or POE adhesive film, for example. Among them, the EVA adhesive film has high transparency, high adhesion, low melting point, easy flowability, and good durability, and can be applied to various interfaces (e.g., glass, metal, or plastic); POE is an ethylene-octylene copolymer, is a novel polyolefin thermoplastic elastomer which is developed by taking metallocene as a catalyst, has narrow relative molecular mass distribution and narrow comonomer distribution and controllable structure, has the characteristics of low water vapor permeability and high volume resistivity, ensures the safety and long-term aging resistance of the POE adhesive film in the high-temperature and high-humidity environment, and ensures that the POE adhesive film can be used for a long time.
In order to improve the overall performance of an EVA (polyethylene-polyvinyl acetate copolymer) adhesive film, the EVA adhesive film comprises the following components in percentage by mass: 1.0-1.6 parts of peroxide initiator, 0.4-0.5 part of antioxidant, 0.1-0.3 part of light stabilizer, 3.0-4.5 parts of heat stabilizer, 0.5-0.7 part of tackifier, 1.0-3.0 parts of plasticizer, 0.3-0.6 part of coupling agent, 0.1-0.2 part of accelerator and the balance of EVA resin.
Specifically, the peroxide is a mixture of diphenyl carbonate (DPC) and ketal peroxide, and the mass ratio of the diphenyl carbonate (DPC) to the ketal peroxide is controlled to be 2-4: the thermal stability of diphenyl carbonate is good, the comprehensive mechanical property of the EVA packaging adhesive film can be improved, the EVA adhesive film can be used under a high-temperature condition, the low-temperature reaction activity of ketal peroxide is high, and the EVA adhesive film can be used under a low-temperature condition.
The antioxidant is a hindered phenol antioxidant and a phosphite antioxidant, and the mass ratio of the hindered phenol antioxidant to the phosphite antioxidant is controlled to be 3-4: 1.
the light stabilizer comprises an ultraviolet absorber and a hindered amine stabilizer, and the mass ratio of the ultraviolet absorber to the hindered amine stabilizer is controlled to be 1-1.5: 1, the hindered amine stabilizer has good thermal-oxidative stability, the efficiency of the hindered amine stabilizer is 2.4 times that of the traditional stabilizer, and the hindered amine stabilizer has good synergistic effect with an ultraviolet absorbent and an antioxidant, so that an EVA (ethylene vinyl acetate) adhesive film cannot be colored.
The heat stabilizer comprises an organic tin stabilizer, a composite stabilizer (such as calcium/zinc and barium/zinc composite soap) and a rare earth stabilizer, and the mass ratio of the organic tin stabilizer to the composite stabilizer is controlled to be (1-1.5): (1-1.9): the composite material comprises an EVA adhesive film, an organic tin stabilizer, a rare earth stabilizer and a glass fiber, wherein the organic tin stabilizer has excellent comprehensive performance and can improve the light transmittance of the EVA adhesive film, and the rare earth stabilizer has the characteristics of high efficiency, high stability and high transparency.
The tackifier is one or more of terpene resin, terpene-phenolic resin, poly rosin, hydrogenated rosin and pentaerythritol ester mixed at any ratio.
The plasticizer is dioctyl phthalate DOP, dibutyl phthalate DBP or diisononyl phthalate DINP.
The coupling agent is a silane coupling agent; the accelerator is triallyl cyanurate (TAC), triallyl Triisocyanate (TAIC) or trimethylolpropane trimethacrylate (TMPTMA).
In order to improve the overall performance of the POE adhesive film, the POE adhesive film comprises the following components in percentage by mass: 0.5-2.0 parts of organic peroxide initiator, 0.5-2.5 parts of accelerator, 0.3-1.5 parts of tackifying coupling agent, 0.1-0.6 part of light stabilizer, 0.1-0.6 part of ultraviolet absorber, 0.05-0.2 part of light conversion additive and the balance of POE resin.
As for the structure of the main body 7, specifically, it includes a plurality of strip-shaped transparent regions and a plurality of strip-shaped opaque regions alternately arranged, and the surfaces of the transparent regions and the opaque regions are flush, the transparent regions correspond to the positions of the cell strings, and the opaque regions correspond to the gaps between the cell strings. The strip-shaped transparent areas and the strip-shaped opaque areas are alternately arranged, the surfaces of the transparent areas and the surfaces of the opaque areas are flush, no height difference exists, the battery piece 3 can be prevented from being hidden and cracked, and the adhesive film of the opaque areas can be prevented from overflowing to the front side of the battery piece 3.
In order to improve the light utilization rate of the solar cell module, the opaque area is a white area, and the white area has high reflectivity and can reflect light rays irradiated to the opaque area, so that the light utilization rate and the power of the solar cell module are improved. Illustratively, the white region is formed by adding titanium dioxide and hollow glass beads as fillers to the glue film matrix.
Or, the opaque region is a black region, and the black region is used as the opaque region to make the appearance of the component black, and when the component is applied to the outer wall or the roof of a building, the color of the component is closer to the color of the surrounding environment. Illustratively, the black region is formed by adding carbon black as a filler to the adhesive film matrix.
Example 1
The solar cell packaging adhesive film of the embodiment comprises: the solar cell packaging adhesive film comprises a main body 7 and a plurality of local bulges 8, wherein the main body 7 and the local bulges 8 are integrally arranged to form an integral adhesive film, and the solar cell packaging adhesive film is an EVA (ethylene vinyl acetate) adhesive film; wherein the gram weight of the main body 7 is 420g/m2The gram weight of the local protrusions 8 is 40g/m2(ii) a The local protrusions 8 in the direction perpendicular to the extension of the cell string are segmented protrusions, see fig. 1.
Example 2
The solar cell packaging adhesive film of the embodiment comprises: the solar cell packaging adhesive film comprises a main body 7 and a plurality of local bulges 8, wherein the main body 7 and the local bulges 8 are integrally arranged to form an integral adhesive film, and the solar cell packaging adhesive film is an EVA (ethylene vinyl acetate) adhesive film; wherein the gram weight of the solar cell packaging adhesive film main body 7 is 450g/m2The gram weight of the local protrusions 8 is 60g/m2(ii) a The local protrusions 8 in the direction perpendicular to the extension direction of the cell string are continuous protrusions, see fig. 2 to 3.
Example 3
The embodiment provides a method for manufacturing a solar cell module, wherein in a lamination process, a first packaging adhesive film 2, a cell string, a second packaging adhesive film 5 and a front cover plate 6 are sequentially laid on a rear cover plate 1 to obtain a laminated piece, the first packaging adhesive film 2 is the solar cell module packaging adhesive film provided in embodiment 1, a local protrusion of the first packaging adhesive film 2 faces the cell string, a local protrusion 8 of the first packaging adhesive film 2 corresponds to a lapping region of an adjacent cell 3 in the cell string, and the structure of the laminated piece is as shown in fig. 4 to 5.
After the lamination process is completed, the resulting laminate is laminated.
Example 4
In the preparation method of the solar cell module provided in this embodiment, in the lamination process, the first encapsulant film 2, the cell string, the second encapsulant film 5, and the front cover plate 6 are sequentially laid on the rear cover plate 1 to obtain a laminated piece, the first encapsulant film 2 and the second encapsulant film 5 are the encapsulant films of the solar cell module provided in embodiment 2, both the local protrusion 8 of the first encapsulant film 2 and the local protrusion 8 of the second encapsulant film 5 face the cell string, both the local protrusion 8 of the first encapsulant film 2 and the local protrusion 8 of the second encapsulant film 5 correspond to the overlapping region of the adjacent cell 3 in the cell string, and the structure of the laminated piece is as shown in fig. 6 to fig. 7.
After the lamination process is completed, the resulting laminate is laminated.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application.

Claims (10)

1. A preparation method of a solar cell module is characterized by comprising the following steps:
laying a first packaging adhesive film, a battery string, a second packaging adhesive film and a front cover plate on the rear cover plate in sequence to obtain a laminated piece;
laminating the laminated piece to obtain a solar cell module;
the battery string comprises a plurality of battery pieces which are connected in a head-to-tail overlapping mode;
the first packaging adhesive film comprises a main body and a plurality of local bulges which are arranged on the main body and correspond to the overlapping area of the battery piece, and/or the second packaging adhesive film comprises a main body and a plurality of local bulges which are arranged on the main body and correspond to the overlapping area of the battery piece.
2. The manufacturing method according to claim 1, wherein the local protrusions of the first adhesive packaging film are disposed on a surface of the main body of the first adhesive packaging film facing the battery string, and/or the local protrusions of the second adhesive packaging film are disposed on a surface of the main body of the second adhesive packaging film facing the battery string.
3. The method of claim 1, wherein the body has a grammage of 380 to 560g/m2。
4. The method according to claim 1, wherein the local protrusions have a grammage of 20 to 300g/m2。
5. The production method according to any one of claims 1 to 4, wherein a plurality of the partial protrusions in the direction perpendicular to the extending direction of the cell string are connected to each other to constitute a continuous protrusion in a stripe shape, and/or a plurality of the partial protrusions in the extending direction of the cell string are connected to each other to constitute a continuous protrusion in a stripe shape.
6. The production method according to any one of claims 1 to 4, wherein the plurality of partial protrusions are provided discontinuously.
7. The production method according to any one of claims 1 to 4, wherein the main body and the partial protrusion are integrally molded;
or, the main body and the local bulge are arranged separately.
8. The manufacturing method according to any one of claims 1 to 4, wherein adjacent two battery pieces are connected by a solder ribbon or a conductive adhesive in the battery string.
9. The production method according to any one of claims 1 to 4, wherein the battery piece is a full-sheet battery piece or a sliced battery piece.
10. A solar cell module produced by the production method according to any one of claims 1 to 9.
CN202010080401.8A 2020-02-05 2020-02-05 Solar cell module and preparation method thereof Active CN111293190B (en)

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