CN110970521A - Solar cell module and preparation method thereof - Google Patents
Solar cell module and preparation method thereof Download PDFInfo
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- CN110970521A CN110970521A CN201910495908.7A CN201910495908A CN110970521A CN 110970521 A CN110970521 A CN 110970521A CN 201910495908 A CN201910495908 A CN 201910495908A CN 110970521 A CN110970521 A CN 110970521A
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Images
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
-
- 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
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- 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)
- Laminated Bodies (AREA)
Abstract
The invention discloses a solar cell module and a preparation method thereof. A solar cell module comprises a window layer, a solar cell packaging assembly and a bottom layer which are sequentially stacked, wherein the solar cell packaging assembly comprises a first packaging film, a solar cell and a second packaging film which are sequentially stacked; the window layer and the first packaging film are fixedly bonded through a first bonding layer, the second packaging film and the bottom layer are fixedly bonded through a second bonding layer, the first bonding layer and the second bonding layer are cross-linked polyester type polyurethane adhesive films, raw materials for preparing the cross-linked polyester type polyurethane adhesive films comprise diisocyanate, polyester polyol and a cross-linking agent, and the mass percentage of the cross-linking agent in the raw materials is 0.5% -5%. The solar cell module is not easy to delaminate.
Description
Technical Field
The invention relates to the technical field of solar energy, in particular to a solar cell module and a preparation method thereof.
Background
The flexible thin-film solar cell module is applied to consumer electronics in a photovoltaic mode at present, secondary packaging is generally needed in order to guarantee the attractive appearance of the product and carry convenience, and a proper adhesive film needs to be selected for use so as to protect connecting wires between the thin-film solar cell module and the module. In order to ensure the characteristics of beauty, portability, ultra-thinness and flexibility of the flexible thin film solar cell, the selected packaging adhesive film generally focuses on the characteristics of softness and thinness. POE adhesive films or EVA adhesive films are common in solar cell packaging adhesive films. However, if the thickness of the EVA film and the POE film is small, the thickness peel strength after the EVA film and the flexible fabric are subjected to secondary packaging lamination and compounding is not sufficient, and delamination is likely to occur.
Disclosure of Invention
In order to solve the technical problems, the invention provides a solar cell module which is not easy to delaminate and a preparation method thereof.
A solar cell module comprises a window layer, a solar cell packaging assembly and a bottom layer which are sequentially stacked, wherein the solar cell packaging assembly comprises a first packaging film, a solar cell and a second packaging film which are sequentially stacked; the window layer and the first packaging film are fixedly bonded through a first bonding layer, the second packaging film and the bottom layer are fixedly bonded through a second bonding layer, the first bonding layer and the second bonding layer are cross-linked polyester type polyurethane adhesive films, raw materials for preparing the cross-linked polyester type polyurethane adhesive films comprise diisocyanate, polyester polyol and a cross-linking agent, and the mass percentage of the cross-linking agent in the raw materials is 0.5% -5%.
Foretell solar module, window layer and first packaging film pass through polyester type polyurethane glued membrane bonding fixed, second packaging film and bottom pass through polyester type polyurethane glued membrane bonding fixed, through experimental determination, even window layer and bottom all adopt the cloth that the adhesiveness is relatively poor, the cross-linked polyester type polyurethane glued membrane of preparation also enables the peel strength between window layer and bottom and the solar cell encapsulation subassembly higher, even the thin whole solar module of cross-linked polyester type polyurethane glued membrane thickness also is difficult for taking place the delaminating.
A preparation method of a solar cell module comprises the following steps:
providing a window layer, a solar cell packaging assembly and a bottom layer, wherein the solar cell packaging assembly comprises a first packaging film, a solar cell and a second packaging film which are sequentially stacked;
arranging a first adhesive material between the window layer and the first packaging film and arranging a second adhesive material between the second packaging film and the bottom layer to enable the window layer, the solar cell packaging assembly and the bottom layer to be sequentially laminated to obtain a laminated body, wherein raw materials for preparing the first adhesive material and the second adhesive material comprise diisocyanate, polyester polyol and a cross-linking agent, and the mass percentage of the cross-linking agent in the raw materials is 0.5-5%; and
and carrying out hot pressing on the laminated body to respectively carry out cross-linking polymerization reaction on the first bonding material and the second bonding material to generate cross-linked polyester polyurethane.
According to the preparation method of the solar cell module, the cross-linked polyester type polyurethane adhesive film is obtained by hot-pressing the window layer and the first packaging film to enable the window layer and the first packaging film to be bonded and fixed, the cross-linked polyester type polyurethane adhesive film is obtained by hot-pressing the second packaging film and the bottom layer to enable the second packaging film and the bottom layer to be bonded and fixed, and the preparation method is simple. Through experimental determination, even if the window layer and the bottom layer both adopt cloth with poor adhesiveness, the prepared cross-linked polyester type polyurethane adhesive film can also enable the peeling strength between the window layer and the bottom layer and the solar cell packaging assembly to be higher, and the whole solar cell assembly is not easy to delaminate even if the cross-linked polyester type polyurethane adhesive film is thinner.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a solar cell module according to an embodiment of the present invention;
fig. 2 is a schematic view of another structure of a solar cell module according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a solar cell package assembly according to an embodiment of the invention;
fig. 4 is a flowchart of a method of manufacturing a solar cell module according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the list of additional identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, 2 and 3, a solar cell module 100 according to an embodiment includes a window layer 101, a solar cell package 102 and a bottom layer 103, which are sequentially stacked, and the solar cell package 102 includes a first package film 1031, a solar cell 1035 and a second package film 1037, which are sequentially stacked. The window layer 101 and the first packaging film 1031 are connected by a first adhesive layer 104, and the second packaging film 1037 and the bottom layer 103 are connected by a second adhesive layer 105. The first bonding layer 104 and the second bonding layer 105 are cross-linked polyester polyurethane adhesive films, raw materials for preparing the cross-linked polyester polyurethane adhesive films comprise diisocyanate, polyester polyol and a cross-linking agent, and the mass percentage of the cross-linking agent in the raw materials is 0.5% -5%.
Among the above-mentioned solar module 100, window layer 101 and first encapsulating film 1031 are fixed through the bonding of crosslinked polyester type polyurethane glued membrane, and second encapsulating film 1037 and bottom layer 103 are fixed through the bonding of crosslinked polyester type polyurethane glued membrane, through experimental determination, even window layer 101 and bottom layer 103 all adopt the cloth that the adhesion is relatively poor, the peel strength between window layer 101 and bottom layer 103 and solar module packaging subassembly 102 is higher for crosslinked polyester type polyurethane glued membrane also, whole solar module 100 is difficult for delaminating.
In the illustrated embodiment, the cross-linking degree of the cross-linked polyester type polyurethane adhesive film is 70% to 90%. The crosslinked polyester type polyurethane adhesive film forms a space network structure inside, the permanent deformation of the crosslinked polyester type polyurethane adhesive film is reduced, the crosslinked polyester type polyurethane adhesive film can be well bonded with cloth, and meanwhile, the crosslinked polyester type polyurethane adhesive film can be well bonded with the surface (usually a high polymer material such as ETFE or PET) of the solar cell packaging assembly 102, so that the main mechanical properties such as tensile strength, peel strength and tear strength can be improved to a great extent.
In some embodiments, the crosslinked polyester polyurethane adhesive film is a crosslinked TDI-based polyester polyurethane adhesive film, a crosslinked MDI-based polyester polyurethane adhesive film, or a crosslinked IPDI-based polyester polyurethane adhesive film.
The molar ratio of-NCO in the diisocyanate to-OH in the polyester polyol is the R value, which can be adjusted depending on the properties of the final product. In the illustrated embodiment, R is > 1, further R is 1.2 to 1.8, and in some embodiments R is 1.6. In some embodiments, the diisocyanate is selected from at least one of Toluene Diisocyanate (TDI), isophorone diisocyanate (IPDI), and diphenylmethane diisocyanate (MDI).
The polyester polyol is at least one selected from polyester dihydric alcohol and polyester trihydric alcohol. The polyester diol is at least one selected from poly (neopentyl glycol adipate) diol, poly (ethylene glycol adipate) diol and polycaprolactone diol (PCL). The polyester triol is at least one selected from polycaprolactone triol, polycarboxylate triol and polycarbonate triol. It is to be noted that the poly (neopentyl glycol adipate) glycol is also poly (neopentyl glycol adipate) and the poly (ethylene glycol adipate) glycol is also poly (ethylene glycol adipate).
In some embodiments, the diisocyanate is TDI and the polyester polyol is poly neopentyl glycol adipate diol. Further, the molar ratio of TDI to poly (neopentyl glycol adipate) glycol was 1.6: 1.
The mass percentage of the cross-linking agent in the raw material is 0.5-5%. The cross-linking agent can promote the reaction of diisocyanate and polyester diol to form a space network structure in the polyester polyurethane. In some embodiments, the crosslinking agent is selected from at least one of an organic peroxide crosslinking agent, an organosilicon crosslinking agent, and a metal organic crosslinking agent. The molecular formula of the organic peroxide is R1-O-O-R2 OR R1-O-OR2-O-O-R3, wherein-R1 and-R2 are aryl and alkyl (-RH)3) Or acyl (-RCO), -R3 is aryl, alkyl (-RH)3) Or an ester group (-RCOO). Further, the crosslinking agent is at least one selected from Benzoyl Peroxide (BPO), diisophenylpropyl peroxide (DCP), tert-butyl peroxybenzoate (TBPB) and 1, 1-di-tert-butyl peroxy-3, 3, 5-trimethylcyclohexane.
In the illustrated embodiment, the raw material for preparing the cross-linked polyester type polyurethane adhesive film further includes an auxiliary cross-linking agent and an anti-aging agent.
In the illustrated embodiment, the mass percentage of the auxiliary crosslinking agent in the raw material is 0.3-3%. The auxiliary crosslinking agent is at least one selected from triallyl isocyanurate, trimethylolpropane acrylate and triallyl isocyanurate. The auxiliary crosslinking agent contains more than two reactive functional groups, helps the crosslinking reaction to occur, forms a net-shaped crosslinking structure, and can improve the crosslinking degree of the reaction.
In the illustrated embodiment, the mass percentage of the antioxidant in the raw material is 0.05% to 1%. The anti-aging agent is at least one selected from an antioxidant and a light stabilizer. The antioxidant is at least one selected from hindered phenol antioxidant, organic phosphate antioxidant and phosphite antioxidant. The light stabilizer is at least one selected from a benzotriazole light stabilizer, a salicylic acid light stabilizer, a benzophenone light stabilizer, a hindered amine light stabilizer and a triazine light stabilizer. In some embodiments, the antioxidant is antioxidant 1010. In some embodiments, the light stabilizer is a benzotriazole UV 326. The antioxidant is not limited to the antioxidant 1010, and any other antioxidant that can be used in a polymer material may be used. The light stabilizer is not limited to benzotriazole UV326, and other light stabilizers applicable to polymer materials can be used.
In addition, the auxiliary crosslinking agent may be omitted or the aging inhibitor may be omitted according to the actual requirements.
Further, the polyester polyurethane adhesive film is prepared by extruding the raw materials into a film and then performing hot pressing on the film, the window layer 101, the solar cell packaging assembly 102 and the bottom layer 103, wherein the hot pressing temperature is 120-160 ℃, and the hot pressing time is 1-3 minutes.
In the illustrated embodiment, the thickness of the first adhesive layer 104 and the second adhesive layer 105 is 0.025mm to 0.1 mm. The thickness of the first adhesive layer 104 and the second adhesive layer 105 is controlled to be 0.025mm to 0.1mm, so that the adhesion between the window layer 101 and the bottom layer 103 and the solar cell module 102 is ensured to be good, and the thickness of the solar cell module 100 is not excessively increased.
In the illustrated embodiment, the window layer 101 and the bottom layer 103 are used for protecting the solar cell package assembly 102 and improving the overall strength of the solar cell assembly 100, the window layer 101 and the bottom layer 103 may be made of cloth material, and the material of the window layer 101 and the bottom layer 103 is suede microfiber cloth in the illustrated embodiment. The thickness of the window layer 101 and the bottom layer 103 may be set to be between 0.3 and 1mm, and specifically may be 0.3mm, 0.45mm, or 1 mm.
In some embodiments, the window layer 101 and the bottom layer 103 are slightly larger than the solar cell package assembly 102, and the edges of the window layer 101 and the bottom layer 103 are fixed by the first adhesive layer 104 and the second adhesive layer 105.
In the illustrated embodiment, the solar cell package assembly 102 further includes a third encapsulation film 1033. The third encapsulating film 1033 is provided between the first encapsulating film 1031 and the solar cell 1035. The third encapsulating film 1033 and the solar cell 1035 are connected by a third adhesive layer 1034, the solar cell 1035 and the second encapsulating film 1037 are connected by a fourth adhesive layer 1036, and the first encapsulating film 1031 and the third encapsulating film 1033 are connected by a fifth adhesive layer 1032.
The first packaging film 1031 is used to improve the resistance of the solar cell package 102 to the external environment, and in the illustrated embodiment, the material of the first packaging film 1031 is ETFE (ethylene tetra fluoro ethylene, ethylene-tetrafluoroethylene copolymer). The thickness of the first packaging film 1031 is 0.02 to 0.03 mm. The material of the second encapsulation film 1037 is modified PET (Polyethylene terephthalate). The third packaging film 1033 is made of modified PET (Polyethylene terephthalate). The thickness of the third sealing film 1033 and the second sealing film 1037 is 0.05 to 0.2mm, and specifically, may be various values such as 0.05mm, 0.1mm, and 0.2 mm.
The material of the third adhesive layer 1034 is at least one selected from polyolefin elastomer (POE), Ethylene Acrylate (EAC), and thermoplastic propylene oxide. The material of the fourth adhesive layer 1036 is selected from at least one of Ethylene Acrylate (EAC) and modified polyolefin. The material of the fifth adhesive layer 1032 is selected from at least one of polyolefin elastomer (POE), Ethylene Acrylate (EAC), and thermoplastic propylene oxide. Further, the thickness of the fifth adhesive layer 1032 and the third adhesive layer 1034 is 0.08 to 0.2 mm. The thickness of the fourth adhesive layer 1036 is 0.05 to 0.1 mm. The thicknesses of the third adhesive layer 1034, the fourth adhesive layer 1036, and the fifth adhesive layer 1032 are not limited to this, and may be adaptively adjusted according to actual needs in other embodiments.
Note that, in some embodiments, the third packaging film 1033 may be omitted, and in this case, the material of the first packaging film 1031 is modified PET. Of course, this case may also be understood that the first packaging film 1031 and the fifth adhesive layer 1032 may be omitted.
The solar cell module 100 can be made as thin as possible while ensuring performance to reduce weight and volume, thus increasing its portability, and accordingly, each film layer in the solar cell module 100 should be made as thin as possible while ensuring performance.
In this embodiment, the window layer 101 and the bottom layer 103 are disposed on two sides of the solar cell packaging assembly 102, so that the protection effect of the solar cell packaging assembly 102 is improved, and meanwhile, the packaging layer and the solar cell packaging assembly 102 are connected through the first adhesive layer 104 and the second adhesive layer 105 formed by the polyurethane adhesive film, so that the resistance of the solar cell assembly 100 to external adverse environments such as a damp-heat environment and ultraviolet rays is improved, and the service life and the reliability of the solar cell assembly 100 are improved.
The solar cell 1035 may be a CIGS (copper indium gallium selenide) thin-film solar cell, and may also be a GaAs (gallium arsenide) solar cell.
The number of the solar cell package assemblies 102 may be one or more. In the illustrated embodiment, the number of the solar cell packages 102 is plural, and the plural solar cell packages 102 are arranged at intervals. In some embodiments, adjacent solar cell package assemblies 102 are connected in series through a flexible conductive film to increase the output voltage and provide more power.
In order to facilitate the storage of the solar cell package assemblies 102, the solar cell package assemblies 102 are connected to each other through a flexible conductive film, so that the damage to the conductive structure can be avoided when the solar cell package assemblies 102 are folded.
In the illustrated embodiment, the flexible conductive film includes a flexible substrate and a conductive layer formed on the flexible substrate. The flexible substrate is used to improve the strength of the flexible conductive film, and for example, a PET film may be used as the flexible substrate, and a copper film may be formed on the PET film, so that the conductive function can be achieved by the copper film. Of course, the structure of the flexible conductive film is not limited thereto, and in other embodiments, flexible conductive films of other structures may be employed.
In the illustrated embodiment, the window layer 101 is provided with a window in a region facing the solar cell package 102. Of course, in other embodiments, the window 1011 may be disposed in the area of the bottom layer 103 opposite to the solar cell package 102.
Folding regions are formed in the window layer 101 and the bottom layer 103 corresponding to the interval between two adjacent solar cell packaging assemblies 102, and the folding regions are provided with through holes 104.
In this way, the plurality of solar cell modules 102 can be unfolded to increase the light receiving area during use, and can be folded in the folding region after use.
It should be understood that, when the window layer 101 and the bottom layer 103 are folded, folds are likely to occur in the folding region, which occupies a large space and affects the overall tidying effect, and therefore, the through hole 104 is formed in the folding region in this embodiment. For example, a waist-shaped hole or a plurality of circular holes can be formed while avoiding the flexible conductive film, and the window layer 101 and the bottom layer 103 can be prevented from being stacked in the folding area by forming the through hole 104, and the window is more attractive and elegant.
Referring to fig. 4, the method for manufacturing the solar cell module includes steps S810 to S830.
Step S810, providing the window layer 101, the solar cell package 102 and the bottom layer 103, wherein the solar cell package 102 includes a first packaging film 1031, a solar cell 1035 and a second packaging film 1037 stacked in sequence.
Of course, in other embodiments, the solar cell package assembly 102 further includes a third encapsulation film 1033. The third encapsulating film 1033 is provided between the first encapsulating film 1031 and the solar cell 1035. The third encapsulating film 1033 and the solar cell 1035 are connected by a third adhesive layer 1034, the solar cell 1035 and the second encapsulating film 1037 are connected by a fourth adhesive layer 1036, and the first encapsulating film 1031 and the third encapsulating film 1033 are connected by a fifth adhesive layer 1032.
In some embodiments, the fabricating the solar cell package assembly 102 mainly includes steps S910 to S930.
Step S910, cutting the original thin-film battery into battery pieces with designed sizes, connecting the positive electrode and the negative electrode of the cut battery pieces, and welding and fixing the battery pieces together to form a single-string battery array battery.
Step S920, connecting the plurality of battery pieces through bus bar wires according to the distribution of the positive and negative ends to form a chip array as the solar battery 1035.
Step S930, the first encapsulation film 1031, the fifth adhesive layer 1032, the third encapsulation film 1033, the third adhesive layer 1034, the solar cell 1035, the fourth adhesive layer 1036, and the second encapsulation film 1037 are sequentially laid down and laminated to form the solar cell encapsulation assembly 102.
Wherein, in the step S930, the laminating temperature is 130-160 ℃, the vacuumizing time is 1-3 minutes, and the laminating time is 2-4 minutes.
Step S820, a first adhesive material is disposed between the window layer 101 and the first packaging film 1031, and a second adhesive material is disposed between the second packaging film 1037 and the bottom layer 103, so that the window layer 101, the solar cell packaging assembly 102, and the bottom layer 103 are sequentially stacked to obtain a stacked body, the raw materials for preparing the first adhesive material and the second adhesive material include diisocyanate, polyester diol, and a cross-linking agent, and the mass percentage content of the cross-linking agent in the raw materials is 0.5% to 5%.
In this embodiment, the first adhesive material and the second adhesive material are capable of undergoing a cross-linking polymerization reaction to form a cross-linked polyester polyurethane.
In the raw materials, the molar ratio of-NCO in diisocyanate to-OH in polyester polyol is R value, and the R value can be adjusted according to the performance of the final product. In the illustrated embodiment, R is > 1, further R is 1.2 to 1.8, and in some embodiments R is 1.6. In some embodiments, the diisocyanate is selected from at least one of Toluene Diisocyanate (TDI), isophorone diisocyanate (IPDI), and diphenylmethane diisocyanate (MDI).
The polyester polyol is at least one selected from polyester dihydric alcohol and polyester trihydric alcohol. The polyester diol is at least one selected from poly (neopentyl glycol adipate) diol, poly (ethylene glycol adipate) diol and polycaprolactone diol (PCL). The polyester triol is at least one selected from polycaprolactone triol, polycarboxylate triol and polycarbonate triol.
In some embodiments, the diisocyanate is TDI and the polyester diol is poly neopentyl glycol adipate diol. A further molar ratio of TDI to poly (neopentyl glycol adipate) glycol was 1.6: 1.
The mass percentage of the cross-linking agent in the raw material is 0.5-5%. The cross-linking agent can promote the reaction of diisocyanate and polyester diol to form a space network structure in the polyester polyurethane. In some embodiments, the crosslinking agent is an organic peroxide. The molecular formula of the organic peroxide is R1-O-O-R2 or R1-O-O-R2-O-O-R3, wherein-R1 and-R2 are aryl and alkyl (-RH)3) Or acyl (-RCO), -R3 is aryl, alkyl (-RH)3) Or an ester group (-RCOO). The crosslinking agent is at least one selected from Benzoyl Peroxide (BPO), diisophenylpropyl peroxide (DCP), tert-butyl peroxybenzoate (TBPB) and 1, 1-di-tert-butyl peroxy-3, 3, 5-trimethylcyclohexane.
In some embodiments, the raw materials of the first and second adhesive materials further include an auxiliary crosslinking agent and an anti-aging agent.
In the illustrated embodiment, the mass percentage of the auxiliary crosslinking agent in the raw material is 0.3-3%. The auxiliary crosslinking agent is at least one selected from triallyl isocyanurate, trimethylolpropane acrylate and triallyl isocyanurate. The auxiliary crosslinking agent contains more than two reactive functional groups, helps the crosslinking reaction to occur, forms a net-shaped crosslinking structure, and can improve the crosslinking degree of the reaction.
In the illustrated embodiment, the mass percentage of the antioxidant in the raw material is 0.05% to 1%. The anti-aging agent is at least one selected from an antioxidant and a light stabilizer. The antioxidant is at least one selected from hindered phenol antioxidant, organic phosphate antioxidant and phosphite antioxidant. The light stabilizer is at least one selected from a benzotriazole light stabilizer, a salicylic acid light stabilizer, a benzophenone light stabilizer, a hindered amine light stabilizer and a triazine light stabilizer. In some embodiments, the antioxidant is antioxidant 1010 and the light stabilizer is a benzotriazole UV 326.
In addition, the auxiliary crosslinking agent may be omitted or the aging inhibitor may be omitted according to the actual requirements.
In some embodiments, the first adhesive material and the second adhesive material are film-like. The first adhesive material and the second adhesive material are prepared by extruding raw materials and then forming a film. Further, the extruder is a double-screw extruder; the processing temperature of extrusion is 80-110 ℃; the film forming adopts flow casting film forming. In some embodiments, the film thickness is 0.025mm to 0.1 mm.
Step S830, performing a hot pressing on the stacked body to respectively perform a cross-linking polymerization reaction on the first adhesive material and the second adhesive material to generate a cross-linked polyester polyurethane.
In this step, the first adhesive material and the second adhesive material are respectively subjected to a cross-linking polymerization reaction to generate a cross-linked polyester urethane, thereby obtaining a first adhesive layer 104 and a second adhesive layer 105.
The hot pressing temperature is 120-160 ℃, and the hot pressing time is 1-3 minutes. Further, the hot pressing is vacuum hot pressing.
In the illustrated embodiment, the thickness of the first adhesive layer 104 and the second adhesive layer 105 is 0.025mm to 0.1 mm. The thickness of the first adhesive layer 104 and the second adhesive layer 105 is controlled to be 0.025mm to 0.1mm, so that the adhesion between the window layer 101 and the bottom layer 103 and the solar cell module 102 is ensured to be good, and the thickness of the solar cell module 100 is not excessively increased.
In the above method for manufacturing the solar cell module 100, the first adhesive material and the second adhesive material are cross-linked and polymerized during the hot pressing, so that the window layer 101 and the bottom layer 103 have good adhesion with the solar cell module 102 and are not easily peeled off.
The following detailed description is given with reference to specific examples.
Example 1
The raw materials in Table 1 were mixed and extruded and cast into a film having a thickness of 30 μm in a twin-screw extruder at a processing temperature of 90 ℃.
TABLE 1
The prepared films are used as a first adhesive material and a second adhesive material, the first adhesive material is arranged between the window layer 101 and the first packaging film 1031, the second adhesive material is arranged between the second packaging film 1037 and the bottom layer 103, the window layer 101, the solar cell packaging assembly 102 and the bottom layer 103 are sequentially stacked to obtain a stacked body, the stacked body is placed into a laminating machine for hot pressing, the first adhesive material forms the first adhesive layer 104, the second adhesive material forms the second adhesive layer 105, and the solar cell assembly is obtained, the hot pressing temperature is 120 ℃, the vacuumizing time is 3 minutes, and the hot pressing time is 3 minutes.
Wherein the window layer 101 is made of imitated microfiber flannelette, and the thickness is 0.45 mm; the bottom layer 103 is made of imitated microfiber flannelette, and the thickness is 0.45 mm. The total thickness of the solar cell package assembly 102 is 1.31mm, and the solar cell package assembly 102 includes a first package film 1031, a fifth adhesive layer 1032, a third package film 1033, a third adhesive layer 1034, a solar cell 1035, a fourth adhesive layer 1036, and a second package film 1037, which are sequentially stacked. The first packaging film 1031 is made of ETFE and has a thickness of 0.02 mm; the fifth adhesive layer 1032 is made of POE adhesive film and has a thickness of 0.2 mm; the third packaging film 1033 is made of a PET film and has a thickness of 0.1 mm; the third adhesive layer 1034 is made of a POE adhesive film with a thickness of 0.2 mm; the solar cell 1035 is a CIGS flexible solar cell with a thickness of 0.4 mm; the fourth adhesive layer 1036 is made of a modified PO adhesive film and has a thickness of 0.08 mm; the second packaging film 1037 is made of a PET film and has a thickness of 0.1 mm. The thickness of the first adhesive layer 104 was 0.03mm, and the thickness of the second adhesive layer 105 was 0.03 mm.
Example 2
The raw materials in Table 2 were mixed and extruded and cast into a film having a thickness of 75 μm in a twin-screw extruder at a processing temperature of 90 ℃.
TABLE 2
The prepared films are used as a first adhesive material and a second adhesive material, the first adhesive material is arranged between the window layer 101 and the first packaging film 1031, the second adhesive material is arranged between the second packaging film 1037 and the bottom layer 103, the window layer 101, the solar cell packaging assembly 102 and the bottom layer 103 are sequentially stacked to obtain a stacked body, the stacked body is placed into a laminating machine for hot pressing, the first adhesive material forms the first adhesive layer 104, the second adhesive material forms the second adhesive layer 105, and the solar cell assembly is obtained, the hot pressing temperature is 140 ℃, the vacuumizing time is 2 minutes, and the hot pressing time is 2 minutes.
Wherein the window layer 101 is made of imitated microfiber flannelette, and the thickness is 0.45 mm; the bottom layer 103 is made of imitated microfiber flannelette, and the thickness is 0.45 mm. The total thickness of the solar cell package assembly 102 is 1.31mm, and the solar cell package assembly 102 includes a first package film 1031, a fifth adhesive layer 1032, a third package film 1033, a third adhesive layer 1034, a solar cell 1035, a fourth adhesive layer 1036, and a second package film 1037, which are sequentially stacked. The first packaging film 1031 is made of ETFE and has a thickness of 0.03 mm; the fifth adhesive layer 1032 is made of POE adhesive film and has a thickness of 0.2 mm; the third packaging film 1033 is made of a PET film and has a thickness of 0.1 mm; the third adhesive layer 1034 is made of a POE adhesive film with a thickness of 0.2 mm; the solar cell 1035 is a CIGS flexible solar cell with a thickness of 0.4 mm; the fourth adhesive layer 1036 is made of a modified PO adhesive film and has a thickness of 0.08 mm; the second packaging film 1037 is made of a PET film and has a thickness of 0.1 mm. The thickness of the first adhesive layer 104 was 0.05mm, and the thickness of the second adhesive layer 105 was 0.05 mm.
Example 3
The raw materials in Table 3 were mixed and extruded and cast into a film having a thickness of 50 μm in a twin-screw extruder at a processing temperature of 90 ℃.
TABLE 3
The prepared films are used as a first adhesive material and a second adhesive material, the first adhesive material is arranged between the window layer 101 and the first packaging film 1031, the second adhesive material is arranged between the second packaging film 1037 and the bottom layer 103, the window layer 101, the solar cell packaging assembly 102 and the bottom layer 103 are sequentially stacked to obtain a stacked body, the stacked body is placed into a laminating machine for hot pressing, the first adhesive material forms the first adhesive layer 104, the second adhesive material forms the second adhesive layer 105, and the solar cell assembly is obtained, the hot pressing temperature is 140 ℃, the vacuumizing time is 2.5 minutes, and the hot pressing time is 3 minutes.
Wherein the window layer 101 is made of imitated microfiber flannelette, and the thickness is 0.45 mm; the bottom layer 103 is made of imitated microfiber flannelette, and the thickness is 0.45 mm. The total thickness of the solar cell package assembly 102 is 1.31mm, and the solar cell package assembly 102 includes a first package film 1031, a fifth adhesive layer 1032, a third package film 1033, a third adhesive layer 1034, a solar cell 1035, a fourth adhesive layer 1036, and a second package film 1037, which are sequentially stacked. The first packaging film 1031 is made of ETFE and has a thickness of 0.02 mm; the fifth adhesive layer 1032 is made of POE adhesive film and has a thickness of 0.2 mm; the third packaging film 1033 is made of a PET film and has a thickness of 0.1 mm; the third adhesive layer 1034 is made of a POE adhesive film with a thickness of 0.2 mm; the solar cell 1035 is a CIGS flexible solar cell with a thickness of 0.4 mm; the fourth adhesive layer 1036 is made of a modified PO adhesive film and has a thickness of 0.08 mm; the second packaging film 1037 is made of a PET film and has a thickness of 0.1 mm. The thickness of the first adhesive layer 104 was 0.075mm and the thickness of the second adhesive layer 105 was 0.075 mm.
Example 4
The raw materials in Table 4 were mixed and extruded and cast into a film having a thickness of 100 μm in a twin-screw extruder at a processing temperature of 90 ℃.
TABLE 4
The prepared films are used as a first adhesive material and a second adhesive material, the first adhesive material is arranged between the window layer 101 and the first packaging film 1031, the second adhesive material is arranged between the second packaging film 1037 and the bottom layer 103, the window layer 101, the solar cell packaging assembly 102 and the bottom layer 103 are sequentially stacked to obtain a stacked body, the stacked body is placed into a laminating machine for hot pressing, the first adhesive material forms the first adhesive layer 104, the second adhesive material forms the second adhesive layer 105, and the solar cell assembly is obtained, the hot pressing temperature is 160 ℃, the vacuumizing time is 1 minute, and the hot pressing time is 1 minute.
Wherein the window layer 101 is made of imitated microfiber flannelette, and the thickness is 0.3 mm; the bottom layer 103 is made of imitated microfiber flannelette, and the thickness is 0.3 mm. The total thickness of the solar cell package assembly 102 is 1.31mm, and the solar cell package assembly 102 includes a first package film 1031, a fifth adhesive layer 1032, a third package film 1033, a third adhesive layer 1034, a solar cell 1035, a fourth adhesive layer 1036, and a second package film 1037, which are sequentially stacked. The first packaging film 1031 is made of ETFE and has a thickness of 0.02 mm; the material of the fifth adhesive layer 1032 was EAC, with a thickness of 0.1 mm; the third packaging film 1033 is made of a PET film and has a thickness of 0.1 mm; the third adhesive layer 1034 is made of a POE adhesive film with a thickness of 0.2 mm; the solar cell 1035 is a CIGS flexible solar cell with a thickness of 0.4 mm; the fourth adhesive layer 1036 is made of EAC and has a thickness of 0.08 mm; the second packaging film 1037 is made of a PET film and has a thickness of 0.1 mm. The thickness of the first adhesive layer 104 was 100 μm, and the thickness of the second adhesive layer 105 was 100 μm.
Example 5
The raw materials in Table 5 were mixed and extruded and cast into a film having a thickness of 25 μm in a twin-screw extruder at a processing temperature of 90 ℃.
TABLE 5
| Serial number | Name of material | Mass content (%) |
| 1 | MDI | 24 |
| 2 | Polycaprolactone diol | 71 |
| 3 | Tert-butyl peroxybenzoate | 3 |
| 4 | Trimethylolpropane acrylate | 1.5 |
| 5 | Antioxidant 1010 | 0.5 |
The prepared films are used as a first adhesive material and a second adhesive material, the first adhesive material is arranged between the window layer 101 and the first packaging film 1031, the second adhesive material is arranged between the second packaging film 1037 and the bottom layer 103, the window layer 101, the solar cell packaging assembly 102 and the bottom layer 103 are sequentially stacked to obtain a stacked body, the stacked body is placed into a laminating machine for hot pressing, the first adhesive material forms the first adhesive layer 104, the second adhesive material forms the second adhesive layer 105, and the solar cell assembly is obtained, the hot pressing temperature is 140 ℃, the vacuumizing time is 2 minutes, and the hot pressing time is 2 minutes.
Wherein the window layer 101 is made of imitated microfiber flannelette and has the thickness of 1 mm; the bottom layer 103 is made of imitated microfiber flannelette, and the thickness is 1 mm. The total thickness of the solar cell package assembly 102 is 1.31mm, and the solar cell package assembly 102 includes a first package film 1031, a fifth adhesive layer 1032, a third package film 1033, a third adhesive layer 1034, a solar cell 1035, a fourth adhesive layer 1036, and a second package film 1037, which are sequentially stacked. The first packaging film 1031 is made of ETFE and has a thickness of 0.03 mm; the material of the fifth adhesive layer 1032 was thermoplastic propylene oxide with a thickness of 0.08 mm; the third packaging film 1033 is made of a PET film and has a thickness of 0.1 mm; the material of the third adhesive layer 1034 is thermoplastic propylene oxide with a thickness of 0.08 mm; the solar cell 1035 is a CIGS flexible solar cell with a thickness of 0.4 mm; the fourth adhesive layer 1036 is made of a modified PO adhesive film and has a thickness of 0.08 mm; the second packaging film 1037 is made of a modified PET film and has a thickness of 0.2 mm. The thickness of the first adhesive layer 104 was 25 μm, and the thickness of the second adhesive layer 105 was 25 μm.
Example 6
The materials in Table 6 were mixed and extruded in a twin-screw extruder to form a film having a thickness of 100. mu.m, and the processing temperature of the extruder was 90 ℃.
TABLE 6
| Serial number | Name of material | Mass content (%) |
| 1 | TDI | 20 |
| 2 | Polycaprolactone triol | 76 |
| 3 | Tert-butyl peroxybenzoate | 2 |
| 4 | Triallylisocyanurate | 1.5 |
| 5 | Antioxidant 1010 | 0.5 |
The prepared films are used as a first adhesive material and a second adhesive material, the first adhesive material is arranged between the window layer 101 and the first packaging film 1031, the second adhesive material is arranged between the second packaging film 1037 and the bottom layer 103, the window layer 101, the solar cell packaging assembly 102 and the bottom layer 103 are sequentially stacked to obtain a stacked body, the stacked body is placed into a laminating machine for hot pressing, the first adhesive material forms the first adhesive layer 104, the second adhesive material forms the second adhesive layer 105, and the solar cell assembly is obtained, the hot pressing temperature is 120 ℃, the vacuumizing time is 3 minutes, and the hot pressing time is 3 minutes.
Wherein the window layer 101 is made of imitated microfiber flannelette, and the thickness is 0.45 mm; the bottom layer 103 is made of imitated microfiber flannelette, and the thickness is 0.45 mm. The total thickness of the solar cell package assembly 102 is 1.31mm, and the solar cell package assembly 102 includes a first package film 1031, a fifth adhesive layer 1032, a third package film 1033, a third adhesive layer 1034, a solar cell 1035, a fourth adhesive layer 1036, and a second package film 1037, which are sequentially stacked. The first packaging film 1031 is made of ETFE and has a thickness of 0.025 mm; the fifth adhesive layer 1032 is made of POE adhesive film and has a thickness of 0.2 mm; the third packaging film 1033 is made of a PET film and has a thickness of 0.1 mm; the third adhesive layer 1034 is made of a POE adhesive film with a thickness of 0.2 mm; the solar cell 1035 is a CIGS flexible solar cell with a thickness of 0.4 mm; the fourth adhesive layer 1036 is made of a modified PO adhesive film and has a thickness of 0.08 mm; the second packaging film 1037 is made of a PET film and has a thickness of 0.05 mm. The thickness of the first adhesive layer 104 was 100 μm, and the thickness of the second adhesive layer 105 was 100 μm.
Example 7
The raw materials in Table 7 were mixed and extruded and cast into a film having a thickness of 60 μm in a twin-screw extruder at a processing temperature of 90 ℃.
TABLE 7
| Serial number | Name of material | Mass content (%) |
| 1 | MDI | 24 |
| 2 | Polycaprolactone diol | 71 |
| 3 | Diisophenylpropyl peroxide | 2 |
| 4 | Triallylisocyanurate | 1.5 |
| 5 | Antioxidant 1010 | 0.5 |
The prepared films are used as a first adhesive material and a second adhesive material, the first adhesive material is arranged between the window layer 101 and the first packaging film 1031, the second adhesive material is arranged between the second packaging film 1037 and the bottom layer 103, the window layer 101, the solar cell packaging assembly 102 and the bottom layer 103 are sequentially stacked to obtain a stacked body, the stacked body is placed into a laminating machine for hot pressing, the first adhesive material forms the first adhesive layer 104, the second adhesive material forms the second adhesive layer 105, and the solar cell assembly is obtained, the hot pressing temperature is 120 ℃, the vacuumizing time is 3 minutes, and the hot pressing time is 3 minutes.
Wherein the window layer 101 is made of imitated microfiber flannelette, and the thickness is 0.45 mm; the bottom layer 103 is made of imitated microfiber flannelette, and the thickness is 0.45 mm. The total thickness of the solar cell package assembly 102 is 1.31mm, and the solar cell package assembly 102 includes a first package film 1031, a fifth adhesive layer 1032, a third package film 1033, a third adhesive layer 1034, a solar cell 1035, a fourth adhesive layer 1036, and a second package film 1037, which are sequentially stacked. The first packaging film 1031 is made of ETFE and has a thickness of 0.025 mm; the fifth adhesive layer 1032 is made of POE adhesive film and has a thickness of 0.2 mm; the third packaging film 1033 is made of a PET film and has a thickness of 0.1 mm; the third adhesive layer 1034 is made of a POE adhesive film with a thickness of 0.2 mm; the solar cell 1035 is a CIGS flexible solar cell with a thickness of 0.4 mm; the fourth adhesive layer 1036 is made of a modified PO adhesive film and has a thickness of 0.08 mm; the second packaging film 1037 is made of a PET film and has a thickness of 0.1 mm. The thickness of the first adhesive layer 104 was 60 μm, and the thickness of the second adhesive layer 105 was 60 μm.
Comparative example 1
The solar cell module of comparative example 1 was fabricated in the same manner as in example 1, except that the raw material compositions of the first adhesive material and the second adhesive material of comparative example 1 are shown in table 8.
TABLE 8
| Serial number | Name of material | Mass content (%) |
| 1 | TDI | 22.5 |
| 2 | Polyneopentyl glycol adipate diol | 76 |
| 5 | Anti-aging agent UV326 | 1.5 |
Comparative example 2
The solar cell module of comparative example 2 was fabricated in the same manner as in example 2, except that the raw material compositions of the first adhesive material and the second adhesive material of comparative example 2 are shown in table 9.
TABLE 9
| Serial number | Name of material | Mass content (%) |
| 1 | TDI | 24 |
| 2 | Polyneopentyl glycol adipate diol | 75 |
| 5 | Anti-aging agent UV326 | 1 |
Comparative example 3
The solar cell module of comparative example 3 was fabricated in the same manner as in example 3, except that the raw material compositions of the first adhesive material and the second adhesive material of comparative example 3 are shown in table 10.
Watch 10
| Serial number | Name of material | Mass content (%) |
| 1 | TDI | 26 |
| 2 | Polyneopentyl glycol adipate diol | 73 |
| 5 | Anti-aging agent UV326 | 1 |
Comparative example 4
The solar cell module of comparative example 4 was fabricated in the same manner as in example 1, except that the first adhesive layer 104 and the second adhesive layer 105 were EVA, and the thickness of the first adhesive layer 104 and the second adhesive layer 105 was 0.2 mm.
Comparative example 5
The solar cell module of comparative example 5 was manufactured in the same manner as in example 1, except that the first adhesive layer 104 and the second adhesive layer 105 were POE and the thickness of the first adhesive layer 104 and the second adhesive layer 105 was 0.2 mm.
The peel strength a between the window layer 101 and the first encapsulant film 1031(ETFE layer), the peel strength B between the second encapsulant film 1037(PET layer) and the base layer 103, and the peel strength C between the window layer 101 and the base layer 103 of the solar cell modules prepared in examples 1 to 7 and comparative examples 1 to 5 were tested, and the test results are shown in tables 11 and 12, where the peel strength a, the peel strength B, and the peel strength C are average values of three sample tests, referring to GB/T2790 (a test on a peel force curve obtained by cutting a module having a width of 1CM, a length of not less than 150mm, and peeling at an angle of 180 degrees with a peeling machine at a speed of 100 mm/min).
The cross-linking degree of the materials of the first adhesive layer 104 and the second adhesive layer 105 of the solar cell modules prepared in examples 1 to 7 and comparative examples 1 to 5 was measured to obtain cross-linking degree data, and the results are shown in tables 11 and 12, and the cross-linking degree data in tables 11 and 12 are the average value of the first adhesive layer 104 and the first adhesive layer 104 of the three samples.
The first adhesive layer 104 and the second adhesive layer 105 of the solar cell modules prepared in examples 1 to 7 and comparative examples 1 to 5 were subjected to ultraviolet aging and wet heat aging tests, and the results are shown in tables 11 and 12.
Wherein, the ultraviolet aging test comprises the following steps: maintaining the temperature of the solar cell module in a dry environment of 60 +/-5 ℃, and enabling ultraviolet irradiation rays to be vertical to the front surface of the solar cell module on a test plane, wherein the minimum irradiation quantity received by the solar cell module is as follows: wavelength range of 280-400 (nm), 5 kWh/m2) The wavelength of 280-320 nm accounts for 3-10% of the total radiation, radiationThe test time was 168 hours (h), the sample was taken out and left standing for 2 hours, and the color change of the first adhesive layer 104 and the second adhesive layer 105 was observed, and 3 parallel samples were tested.
The testing method of the damp-heat aging comprises the following steps: the solar cell module was left at a temperature of 55 ℃ and a relative humidity of 95% RH, and after 192 hours of the test, the color change of the first adhesive layer 104 and the second adhesive layer 105 was observed, and 3 parallel samples were tested.
TABLE 11
TABLE 12
As can be seen from tables 11 and 12, the solar cell modules of examples 1 to 7 have high peel strength and are not easy to age, and the adhesive films of comparative examples 1 to 3 are not subjected to crosslinking treatment, so that the peel strength is greatly reduced; in the solar cell modules of comparative examples 4 to 5, although the peel strength satisfied the test standard of the solar cell module, the thicknesses of the EVA film and the POE film were both 0.2mm, and could not satisfy the test standard of the folding thickness of the solar cell module (the total thickness of the folded film was not more than 9.1 mm).
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A solar cell module comprising a window layer (101), a solar cell package assembly (102) and a bottom layer (103) laminated in this order, the solar cell package assembly (102) comprising a first package film (1031), a solar cell (1035) and a second package film (1037) laminated in this order; the window layer (101) and the first packaging film (1031) are fixedly bonded through a first bonding layer (104), the second packaging film (1037) and the bottom layer (103) are fixedly bonded through a second bonding layer (105), the first bonding layer (104) and the second bonding layer (105) are cross-linked polyester polyurethane adhesive films, raw materials for preparing the cross-linked polyester polyurethane adhesive films comprise diisocyanate, polyester polyol and a cross-linking agent, and the mass percentage content of the cross-linking agent in the raw materials is 0.5% -5%.
2. The solar cell module according to claim 1, wherein the diisocyanate is at least one selected from the group consisting of toluene diisocyanate, isophorone diisocyanate, and diphenylmethane diisocyanate; and/or
The polyester polyol is selected from at least one of polyester dihydric alcohol and polyester trihydric alcohol.
3. The solar cell module as claimed in claim 1, wherein the raw materials comprise toluene diisocyanate, poly neopentyl glycol adipate diol, and a cross-linking agent.
4. The solar cell module according to claim 1, wherein the raw material further comprises an auxiliary crosslinking agent, the mass percentage of the auxiliary crosslinking agent in the raw material is 0.3-3%, and the auxiliary crosslinking agent is at least one selected from triallyl isocyanurate, trimethylolpropane acrylate and triallyl isocyanurate; and/or
The crosslinking agent is at least one selected from an organic peroxide crosslinking agent, an organic silicon crosslinking agent and a metal organic crosslinking agent.
5. The solar cell module according to claim 1, wherein the window layer (101) and the bottom layer (103) are cloth layers, and the first and second encapsulation films (1031, 1037) are PET layers; and/or
The window layer (101) and the bottom layer (103) are cloth layers, and the edges of the window layer (101) and the bottom layer (103) are bonded and fixed through the first bonding layer (104) and the second bonding layer (105).
6. The solar cell module according to claim 1, wherein the solar cell package assembly (102) further comprises a third packaging adhesive film (1033) disposed between the first packaging film (1031) and the solar cell (1035), the first packaging film (1031) is made of ethylene-tetrafluoroethylene copolymer, the window layer (101) and the bottom layer (103) are cloth layers, and the first packaging film (1031) and the second packaging film (1037) are PET layers.
7. The solar cell module according to claim 6, wherein the third encapsulant film (1033) is adhesively secured to the solar cell (1035) by a third adhesive layer (1034), the solar cell (1035) is adhesively secured to the second encapsulant film (1037) by a fourth adhesive layer (1036), and the first encapsulant film (1031) is adhesively secured to the third encapsulant film (1033) by a fifth adhesive layer (1032); the material of the third adhesive layer (1034) is selected from at least one of polyolefin elastomer, ethylene acrylate and thermoplastic propylene oxide; the material of the fourth adhesive layer (1036) is selected from at least one of ethylene acrylate and modified polyolefin; the material of the fifth adhesive layer (1032) is at least one selected from the group consisting of polyolefin elastomer, ethylene acrylate, and thermoplastic propylene oxide.
8. A preparation method of a solar cell module is characterized by comprising the following steps:
providing a window layer (101), a solar cell packaging assembly (102) and a bottom layer (103), wherein the solar cell packaging assembly (102) comprises a first packaging film (1031), a solar cell (1035) and a second packaging film (1037) which are sequentially stacked;
arranging a first adhesive material between the window layer (101) and the first packaging film (1031) and arranging a second adhesive material between the second packaging film (1037) and the bottom layer (103) to sequentially laminate the window layer (101), the solar cell packaging assembly (102) and the bottom layer (103) to obtain a laminated body, wherein raw materials for preparing the first adhesive material and the second adhesive material comprise diisocyanate, polyester polyol and a cross-linking agent, and the mass percentage of the cross-linking agent in the raw materials is 0.5-5%; and
and carrying out hot pressing on the laminated body to respectively carry out cross-linking polymerization reaction on the first bonding material and the second bonding material to generate cross-linked polyester polyurethane.
9. The method for manufacturing a solar cell module according to claim 8, wherein the temperature of the hot pressing is 120 ℃ to 160 ℃ and the time of the hot pressing is 1 minute to 3 minutes.
10. The method of claim 8, wherein the preparing of the first and second adhesive materials comprises the steps of: and extruding the raw materials to form a film.
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