CN117887377A - High-reflection packaging adhesive film for main-grid-free battery assembly, preparation method of high-reflection packaging adhesive film and photovoltaic assembly - Google Patents

High-reflection packaging adhesive film for main-grid-free battery assembly, preparation method of high-reflection packaging adhesive film and photovoltaic assembly Download PDF

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CN117887377A
CN117887377A CN202410157269.4A CN202410157269A CN117887377A CN 117887377 A CN117887377 A CN 117887377A CN 202410157269 A CN202410157269 A CN 202410157269A CN 117887377 A CN117887377 A CN 117887377A
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parts
light conversion
powder
layer
adhesive film
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谢波
陈磊
纪文根
王凯
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Jiangsu Lushan New Material Co ltd
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Jiangsu Lushan New Material Co ltd
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Abstract

The invention relates to the technical field of photovoltaics, in particular to a high-reflection packaging adhesive film for a main-grid-free battery assembly, a preparation method of the high-reflection packaging adhesive film and a photovoltaic assembly. The high-reflection packaging adhesive film for the main-grid-free battery assembly comprises a bearing layer, a light conversion layer and an infrared reflection layer; the bearing layer comprises 50-80 parts of TPO resin, 20-50 parts of POE resin, 0.05-0.5 part of Eu 3+ modified organic light conversion powder and an auxiliary agent; the light conversion layer comprises 100 parts of EVA resin, 0.05-0.5 part of Eu 3+ modified organic light conversion powder and an auxiliary agent; the infrared reflecting layer comprises 100 parts of POE resin, 0.05-0.5 part of Eu 3+ modified organic light conversion powder, 0.5-10 parts of rare earth manganese oxide and an auxiliary agent. The high-reflection packaging adhesive film can be used for a battery component without a main grid, and has the pressing effect on a low-temperature welding strip, the reflection effect of red light, the power generation temperature of the component and the power of the component.

Description

High-reflection packaging adhesive film for main-grid-free battery assembly, preparation method of high-reflection packaging adhesive film and photovoltaic assembly
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a high-reflection packaging adhesive film for a main-grid-free battery assembly, a preparation method of the high-reflection packaging adhesive film and a photovoltaic assembly.
Background
The packaging adhesive film for the main-grid-free battery assembly is mainly used for HJT batteries, and the existing packaging adhesive film for the main-grid-free battery assembly is mainly transparent cut-off type, EE/EP/EPE pre-crosslinked type or composite type integrated adhesive film. For the assembly, the use of the infrared reflection black packaging adhesive film can further improve the power of the assembly, reduce the power generation temperature of the assembly, improve the power generation efficiency and save energy.
However, the existing infrared reflection black packaging adhesive film in the battery assembly without the main grid is not applicable, and because the existing infrared reflection black packaging adhesive film is high in fluidity at high temperature, the low-temperature welding wire of the battery assembly without the main grid cannot be pressed and fixed, and the problems of virtual connection, welding wire deviation and the like can be generated. The high-reflection packaging adhesive film applicable to the battery assembly without the main grid has important significance for power improvement and the like of the battery assembly without the main grid.
In view of this, the present invention has been made.
Disclosure of Invention
It is an object of the present invention to provide a highly reflective packaging film for a no-main-grid battery module that increases the power of the module and reduces the PID attenuation of the module.
The invention further aims to provide a preparation method of the high-reflection packaging adhesive film for the main-grid-free battery assembly.
It is yet another object of the present invention to provide a photovoltaic module.
In order to achieve the above object of the present invention, one aspect of the present invention provides a high reflection packaging film for a non-main-grid battery assembly, which includes a carrier layer, a light conversion layer and an infrared reflection layer laminated in sequence;
The bearing layer is mainly prepared from the following components in parts by weight: 50 to 80 parts of TPO resin, 20 to 50 parts of POE resin, 0.05 to 0.5 part of Eu 3+ modified organic light conversion powder and 0.42 to 4.7 parts of first auxiliary agent;
the light conversion layer is mainly prepared from the following components in parts by weight: 100 parts of EVA resin, 0.05-0.5 part of Eu 3+ modified organic light conversion powder and 0.42-4.7 parts of second auxiliary agent;
The infrared reflecting layer is mainly prepared from the following components in parts by weight: 100 parts of POE resin, 0.05 to 0.5 part of Eu 3+ modified organic light conversion powder, 0.5 to 10 parts of rare earth manganese oxide and 0.42 to 4.7 parts of third auxiliary agent;
The Eu 3+ modified organic light conversion powder is mainly prepared from the following components in parts by weight: 100 parts of benzotriazole light conversion powder, 1-10 parts of benzotriazole ultraviolet absorber, 1-10 parts of Eu 3+ doped CdS quantum dot powder, 0.1-5 parts of silane coupling agent, 0.1-10 parts of silicate, 0.1-1 part of hydrolysate and 5-20 parts of solvent.
In the specific embodiment of the invention, the benzotriazole light conversion powder comprises at least one of the compounds shown in the following structures of formulas I-II:
In a specific embodiment of the present invention, the rare earth manganese oxide is YMnO 3.
In a specific embodiment of the present invention, the preparation of the Eu 3+ -doped CdS quantum dot powder includes: (a) Mixing and dissolving water-soluble Cd salt, acrylamide and an initiator in water to obtain a water phase; dissolving a nonionic surfactant in an organic solvent to obtain an oil phase; adding the water phase into the oil phase, stirring for pre-emulsification, and then reacting for 2-6 hours at 60-80 ℃ under a protective atmosphere to obtain Cd salt-PAM emulsion;
(b) Adding a solution containing sodium sulfide and acrylamide into the Cd salt-PAM emulsion, reacting for 2-4 hours at 60-80 ℃, then adding an aqueous solution containing water-soluble Eu salt, and reacting for 1-3 hours at 60-80 ℃ to obtain a CdS-PAM composite emulsion doped with Eu 3+;
(c) And carrying out hydrothermal reaction on the Eu 3+ doped CdS-PAM nano emulsion, collecting solids, and drying to obtain the Eu 3+ doped CdS quantum dot powder.
In a specific embodiment of the present invention, the water-soluble Cd salt comprises CdSO 4·8/3H2 O.
In a specific embodiment of the present invention, in step (a), the mass ratio of the water-soluble Cd salt to the acrylamide is 1: (15 to 25). Further, the initiator is ammonium persulfate; the mass of the initiator is 1-10wt% of that of the acrylamide.
In a specific embodiment of the present invention, the nonionic surfactant comprises span 80; the organic solvent comprises cyclohexane. Further, the mass ratio of the nonionic surfactant to the organic solvent is 1: (20 to 30).
In a specific embodiment of the present invention, the mass ratio of sodium sulfide to acrylamide in the solution containing sodium sulfide and acrylamide is 1: (2 to 4).
In a specific embodiment of the present invention, the solution containing sodium sulfide and acrylamide is an aqueous solution or emulsion. Further, in the aqueous solution, the mass ratio of acrylamide to water is 1: (5 to 8).
In a specific embodiment of the present invention, the emulsion further comprises a nonionic surfactant and an organic solvent. Further, the nonionic surfactant includes span 80, and the organic solvent includes cyclohexane.
In a specific embodiment of the present invention, in the step (b), the mass ratio of the solution containing sodium sulfide and acrylamide to the Cd salt-PAM emulsion is 1: (2-20).
In a specific embodiment of the present invention, in step (b), the amount of the water-soluble Eu salt used in the aqueous solution containing the water-soluble Eu salt is 0.5 to 15 times that of the acrylamide in step (a).
In a specific embodiment of the present invention, the benzotriazole ultraviolet absorber comprises UV-329.
In a specific embodiment of the present invention, the preparation of the Eu 3+ modified organic light conversion powder includes: dispersing the benzotriazole phototropic powder, the benzotriazole ultraviolet absorber and the Eu 3+ doped CdS quantum dot powder in a solvent, adding a silane coupling agent, silicate and hydrolysate, performing hydrolysis reaction, removing the solvent and drying to obtain the Eu 3+ modified organic phototropic powder.
In a specific embodiment of the present invention, the ratio of the thicknesses of the support layer, the light conversion layer and the infrared reflection layer is 1: (1.5 to 2.5) to (1.5 to 2.5).
In a specific embodiment of the present invention, the thickness of the bearing layer is 0.05-0.2 mm; the thickness of the light conversion layer is 0.1-0.3 mm; the thickness of the infrared reflecting layer is 0.1-0.3 mm.
The invention also provides a preparation method of the high-reflection packaging adhesive film for the main-grid-free battery assembly, which comprises the following steps:
And carrying out coextrusion, stretching and traction on the bearing layer, the light conversion layer and the infrared reflection layer according to the raw material ratio, and then carrying out electron beam irradiation pre-crosslinking treatment on one side of the bearing layer to obtain the high-reflection packaging adhesive film.
In a specific embodiment of the present invention, in the electron beam irradiation pre-crosslinking treatment, the pre-crosslinking degree is 1% to 60%.
The invention further provides a photovoltaic module, which comprises any one of the high-reflection packaging adhesive films for the main grid-free battery module.
In a specific embodiment of the invention, the photovoltaic module further comprises a cell and glass; the bearing layer in the packaging adhesive film is attached to the battery piece, and the infrared reflecting layer in the packaging adhesive film is attached to the glass.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, through the three-layer structure, the bearing layer has a good lamination effect on the low-temperature welding strip; the infrared reflecting layer adopts rare earth manganese oxide to cooperate with Eu 3+ to modify organic light conversion powder, on one hand, the high refractive index of the rare earth manganese oxide is utilized to improve the infrared light reflectivity of the infrared reflecting layer, thereby playing the roles of heat insulation and reducing the power generation temperature of the component, and on the other hand, eu 3+ is utilized to modify the organic light conversion powder to convert transmitted ultraviolet band light into red light; the light conversion layer in the middle can convert part of ultraviolet light passing through the light conversion layer into red light, and then the red light is reflected to the battery piece through the infrared reflection layer, so that a certain degree of power gain is realized;
(2) The main grid-free battery component prepared by the high-reflection packaging adhesive film can achieve the lamination effect on the low-temperature welding strip, the improvement of the reflection effect on red light, the reduction of the power generation temperature of the component and the improvement of the power of the component.
Detailed Description
The technical solution of the present invention will be clearly and completely described in conjunction with the specific embodiments, but it will be understood by those skilled in the art that the examples described below are some, but not all, examples of the present invention, and are intended to be illustrative only and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a high-reflection packaging adhesive film for a main-grid-free battery assembly, which comprises a bearing layer, a light conversion layer and an infrared reflection layer which are sequentially laminated;
the bearing layer is mainly prepared from the following components in parts by weight: 50 to 80 parts of TPO resin, 20 to 50 parts of POE resin, 0.05 to 0.5 part of Eu 3+ modified organic light conversion powder and 0.42 to 4.7 parts of first auxiliary agent;
The light conversion layer is mainly prepared from the following components in parts by weight: 100 parts of EVA resin, 0.05-0.5 part of Eu 3+ modified organic light conversion powder and 0.42-4.7 parts of second auxiliary agent;
the infrared reflecting layer is mainly prepared from the following components in parts by weight: 100 parts of POE resin, 0.05 to 0.5 part of Eu 3+ modified organic light conversion powder, 0.5 to 10 parts of rare earth manganese oxide and 0.42 to 4.7 parts of third auxiliary agent;
The Eu 3+ modified organic light conversion powder is mainly prepared from the following components in parts by weight: 100 parts of benzotriazole light conversion powder, 1-10 parts of benzotriazole ultraviolet absorber, 1-10 parts of Eu 3+ doped CdS quantum dot powder, 0.1-5 parts of silane coupling agent, 0.1-10 parts of silicate, 0.1-1 part of hydrolysate and 5-20 parts of solvent.
According to the invention, through the three-layer structure, the bearing layer has a good lamination effect on the low-temperature welding strip; the rare earth manganese oxide is adopted in the infrared reflecting layer to cooperate with Eu 3+ to modify the organic light conversion powder, the rare earth manganese oxide and the organic light conversion powder are bridged by a silane coupling agent and the like, so that the rare earth manganese oxide and the organic light conversion powder are uniformly dispersed in matrix resin, on one hand, the high refractive index of the rare earth manganese oxide is utilized to improve the infrared light reflectivity of the infrared reflecting layer, the effect of heat insulation and reduction of the power generation temperature of the component is achieved, and on the other hand, eu 3+ is utilized to modify the organic light conversion powder to convert transmitted ultraviolet band light into red light; the light conversion layer in the middle can convert part of ultraviolet light passing through the light conversion layer into red light, and then the red light is reflected to the battery piece through the infrared reflection layer, so that a certain degree of power gain is realized.
After the high-reflection packaging adhesive film is used for a component, sunlight diffusely reflected from the ground irradiates the back surface of the component, namely the infrared reflection layer side, infrared band light can be reflected out, and the effects of heat insulation and power generation temperature reduction of the component are achieved; meanwhile, the infrared reflecting layer can effectively prevent water vapor from contacting with the oxygen light conversion layer, and plays roles in protecting light conversion materials and prolonging service life. On the other hand, sunlight entering from the front of the assembly can penetrate through and irradiate into the back adhesive film in the gap of the battery piece of the assembly, the infrared light part can be reflected to the battery piece through the infrared reflection layer, a certain degree of power gain is achieved for the assembly, the ultraviolet light part can be converted into red light through the light conversion layer, then the red light is reflected to the battery piece through the infrared reflection layer, and a certain degree of power gain can be achieved for the assembly.
In Eu 3+ modified organic light conversion powder, compared with 100 parts of benzotriazole light conversion powder, the Eu 3+ modified organic light conversion powder comprises the following components in parts by weight:
the use amount of the benzotriazole ultraviolet absorber can be 1 part, 2 parts, 5 parts, 8 parts, 10 parts or a range composed of any two of the above;
The dosage of the Eu 3+ doped CdS quantum dot powder can be 1 part, 2 parts, 5 parts, 8 parts, 10 parts or a range formed by any two of the above;
The amount of the silane coupling agent may be 0.1 part, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, or a range composed of any two of them;
The silicate may be used in an amount ranging from 1 part, 2 parts, 5 parts, 8 parts, 10 parts, or any two thereof;
The amount of the hydrolysate may be 0.1 part, 0.2 part, 0.5 part, 0.8 part, 1 part or a range composed of any two of them;
The solvent may be used in an amount ranging from 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, or any two thereof.
As in the various embodiments, the amounts of the components in the carrier layer, in parts by weight, may be as follows:
the TPO resin may be used in an amount ranging from 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts or any two thereof;
the POE resin may be used in an amount ranging from 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, or any two thereof;
The Eu 3+ modified organic light conversion powder can be used in an amount of 0.05 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part or a range formed by any two of the above parts;
The first auxiliary agent may be used in an amount ranging from 0.42 parts, 0.5 parts, 1 part, 1.5 parts, 2 parts, 3 parts, 4 parts, 4.5 parts, 4.7 parts, or any two thereof.
The TPO resin is used as the main resin in the bearing layer, and the good lamination effect on the low-temperature welding strip can be achieved after the subsequent electron beam irradiation pre-crosslinking treatment.
In the light conversion layer, the following components may be used in the following amounts, respectively, in parts by weight, compared to 100 parts of EVA resin:
The Eu 3+ modified organic light conversion powder can be used in an amount of 0.05 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part or a range formed by any two of the above parts;
The second aid may be used in an amount ranging from 0.42 parts, 0.5 parts, 1 part, 1.5 parts, 2 parts, 3 parts, 4 parts, 4.5 parts, 4.7 parts, or any two thereof.
As in the various embodiments, the infrared reflecting layer may comprise the following components in parts by weight, relative to 100 parts of POE resin:
The Eu 3+ modified organic light conversion powder can be used in an amount of 0.05 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part or a range formed by any two of the above parts;
The rare earth manganese oxide may be used in an amount ranging from 0.5 parts, 1 part, 2 parts, 5 parts, 8 parts, 10 parts, or any two thereof;
the third auxiliary agent may be used in an amount ranging from 0.42 parts, 0.5 parts, 1 part, 1.5 parts, 2 parts, 3 parts, 4 parts, 4.5 parts, 4.7 parts, or any two thereof.
In a specific embodiment of the present invention, the TPO resin comprises at least one of an ethylene-propylene copolymer, an ethylene-butene copolymer, an ethylene-octene copolymer, an ethylene-hexene copolymer, polyethylene, polypropylene, and ethylene propylene diene monomer.
In the specific embodiment of the invention, the benzotriazole light conversion powder comprises at least one of the compounds shown in the following structures of formulas I-II:
The benzotriazole light conversion powder has excellent light conversion effect.
In a specific embodiment of the invention, the rare earth manganese oxide is YMnO 3.
In a specific embodiment of the present invention, the preparation of the Eu 3+ doped CdS quantum dot powder comprises:
(a) Mixing and dissolving water-soluble Cd salt, acrylamide and an initiator in water to obtain a water phase; dissolving a nonionic surfactant in an organic solvent to obtain an oil phase; adding the water phase into the oil phase, stirring for pre-emulsification, and then reacting for 2-6 hours at 60-80 ℃ under a protective atmosphere to obtain Cd salt-PAM emulsion;
(b) Adding a solution containing sodium sulfide and acrylamide into Cd salt-PAM emulsion, reacting for 2-4 hours at 60-80 ℃, then adding an aqueous solution containing water-soluble Eu salt, and reacting for 1-3 hours at 60-80 ℃ to obtain a CdS-PAM composite emulsion doped with Eu 3+;
(c) And (3) carrying out hydrothermal reaction on the Eu 3+ doped CdS-PAM nano emulsion, and then collecting and drying solids to obtain Eu 3+ doped CdS quantum dot powder.
In the actual operation, in the process of adding the water phase into the oil phase in the step (a), the stirring operation is carried out for 10-20 min, so as to complete the pre-emulsification.
Eu 3+ modified organic light conversion powder is added in each layer, polyacrylamide PAM is a polymer capable of being coordinated with metal ions, N on molecular chain links of PAM can be subjected to exchange reaction with Eu 3+ metal ions to form a coordination polymer, then Eu 3+ complex and benzotriazole light conversion powder form Eu 3+ -benzotriazole ligand polymer, the ligand polymer takes rare earth Eu 3+ as a luminescence center, the excitation wavelength of the ligand polymer is 300-350 nm (such as 340 nm), the emission wavelength is 613nm plus or minus 10nm, ultraviolet light is converted into red light, and the organic light conversion powder which is not modified by Eu 3+ can only convert ultraviolet light into blue light.
In step (a), as in the various embodiments, the reaction may be carried out under a protective atmosphere at 60 ℃, 65 ℃,70 ℃, 75 ℃, 80 ℃ or any two of them for 2h, 3h, 4h, 5h, 6h or any two of them; the reaction temperature can be adjusted according to the initiation temperature of the initiator, the initiation is ensured, the system is stable, the reaction time can be adjusted according to the conversion rate of the acrylamide in the system, and the conversion rate of the acrylamide is ensured to be more than or equal to 99 percent. The conversion of acrylamide can be determined by gas chromatography with reference to GB/T12005.5-1989.
In actual operation, in the step (b), the operation of adding the solution containing sodium sulfide and acrylamide into the Cd salt-PAM emulsion can be performed by a microinjection pump, so that the solution containing sodium sulfide and acrylamide is added into the Cd salt-PAM emulsion at a constant speed; the aqueous solution containing the water-soluble Eu salt may also be carried out by a microinjection pump so that the aqueous solution containing the water-soluble Eu salt is added to the system at a constant rate. The rate of addition may be 10 to 200mL/h, for example, 10mL/h, 50mL/h, 80mL/h, 100mL/h, 150mL/h, 180mL/h, 200mL/h, etc.
In the step (b), after a solution containing sodium sulfide and acrylamide is added into Cd salt-PAM emulsion, the solution is subjected to heat preservation and airtight reaction for a corresponding time under the stirring effect under the corresponding temperature condition; after adding the aqueous solution containing the water-soluble Eu salt, the reaction is carried out for a corresponding time in a heat-preserving and airtight manner under the stirring effect under the corresponding temperature condition.
In actual operation, in the step (c), the hydrothermal reaction is carried out in a polytetrafluoroethylene-lined hydrothermal reaction kettle, the hydrothermal reaction kettle added with the reaction materials is placed in a constant-temperature drying box, and the reaction is carried out at the corresponding temperature for the corresponding time. After the reaction is finished, the solid can be collected through centrifugal separation, and is washed by absolute ethyl alcohol, and is placed in a vacuum drying oven at 50-55 ℃ for drying for more than 10 hours, so that Eu 3+ doped CdS quantum dot powder is obtained.
In a specific embodiment of the present invention, the water soluble Cd salt comprises CdSO 4·8/3H2 O.
In a specific embodiment of the present invention, in step (a), the mass ratio of the water-soluble Cd salt to acrylamide is 1: (15-25). Further, the initiator is ammonium persulfate; the mass of the initiator is 1-10wt% of that of the acrylamide.
As in the various embodiments, in step (a), the mass ratio of the water-soluble Cd salt to acrylamide may be 1:15, 1:18, 1:20, 1:22, 1:25, or a range of any two thereof; the mass of the initiator may be 1wt%, 2wt%, 4wt%, 5wt%, 8wt%, 10wt% or a range of any two of these compositions of the mass of acrylamide.
In a specific embodiment of the present invention, in step (a), the mass of water is 2 to 6 times the mass of acrylamide. As in the various embodiments, the mass of water in the aqueous phase of step (a) may be 2 times, 3 times, 4 times, 5 times, 6 times or a range of any two of these compositions.
In a specific embodiment of the present invention, the nonionic surfactant comprises span 80; the organic solvent comprises cyclohexane. Further, the mass ratio of the nonionic surfactant to the organic solvent is 1: (20 to 30). As in the various embodiments, the mass ratio of nonionic surfactant to organic solvent may be in the range of 1:20, 1:22, 1:25, 1:28, 1:30, or any two thereof.
In a specific embodiment of the present invention, the mass ratio of sodium sulfide to acrylamide in the solution containing sodium sulfide and acrylamide is 1: (2 to 4). As in the various embodiments, the mass ratio of sodium sulfide to acrylamide may be in the range of 1:2, 1:2.5, 1:3, 1:3.5, 1:4, or any two thereof.
In a specific embodiment of the invention, the solution comprising sodium sulfide and acrylamide is an aqueous solution or emulsion.
In practice, when an aqueous solution containing sodium sulfide and acrylamide is used in the step (b), the mass ratio of acrylamide to water in the aqueous solution is 1:5-8. As in the various embodiments, the mass ratio of acrylamide to water in the aqueous solution may be in the range of 1:5, 1:6, 1:7, 1:8, or any two thereof.
In a specific embodiment of the present invention, when an emulsion comprising sodium sulfide and acrylamide is used in step (b), a nonionic surfactant and an organic solvent are also included. Wherein the nonionic surfactant may comprise span 80 and the organic solvent may comprise cyclohexane.
In a specific embodiment of the present invention, the mass ratio of the nonionic surfactant to acrylamide in the emulsion is 1: (0.5 to 1). Further, the mass ratio of the organic solvent to the nonionic surfactant is (20 to 30) to 1.
As in the various embodiments, the mass ratio of nonionic surfactant to acrylamide in the emulsion comprising sodium sulfide and acrylamide may be 1:0.5, 1:0.6, 1:0.8, 1:1, or a range of any two thereof; the mass ratio of the organic solvent to the nonionic surfactant in the emulsion containing sodium sulfide and acrylamide may be 20:1, 22:1, 25:1, 28:1, 30:1 or a range of any two thereof.
The preparation of the emulsion containing sodium sulfide and acrylamide comprises the following steps: pouring the aqueous solution containing sodium sulfide and acrylamide into an oil phase, stirring and pre-emulsifying for 10-20 min, and then carrying out ultrasonic treatment for 3-6 min. Wherein the oil phase is prepared by dissolving nonionic surfactant (lipophilic) in organic solvent.
In a specific embodiment of the present invention, in the step (b), the mass ratio of the solution containing sodium sulfide and acrylamide to the Cd salt-PAM emulsion is 1: (2 to 20).
As in the various embodiments, in step (b), the mass ratio of the sodium sulfide and acrylamide containing solution to the Cd salt-PAM emulsion may be in the range of 1:2, 1:5, 1:8, 1:10, 1:12, 1:15, 1:18, 1:20, or any two thereof.
In a specific embodiment of the present invention, in step (b), the amount of the water-soluble Eu salt used in the aqueous solution containing the water-soluble Eu salt is 0.5 to 15 times that of acrylamide in step (a).
As in the various embodiments, in step (b), the amount of water-soluble Eu salt in the aqueous solution containing the water-soluble Eu salt may be 0.5 times, 2 times, 5 times, 8 times, 10, 15 times or a range of any two of the compositions of acrylamide in step (a).
In a specific embodiment of the invention, the temperature of the hydrothermal reaction is 100-105 ℃ and the time of the hydrothermal reaction is 4-8 hours.
In a specific embodiment of the present invention, the benzotriazole ultraviolet absorber comprises UV-329.
In a specific embodiment of the present invention, the silane coupling agent includes at least one of a carbon-carbon double bond-containing silane coupling agent and/or an amino-containing silane coupling agent.
Wherein the silane coupling agent containing carbon-carbon double bond comprises at least one of 3-methacryloxypropyl trimethoxysilane, 3-methacryloxypropyl triethoxysilane and 3-methacryloxypropyl triisopropoxysilane; the amino-containing alkoxysilane includes at least one of 3-aminopropyl trimethoxysilane and 3-aminopropyl triethoxysilane.
In a specific embodiment of the present invention, the silicate comprises at least one of methyl orthosilicate, ethyl orthosilicate, and isopropyl orthosilicate.
In a specific embodiment of the present invention, the hydrolysate comprises water and an alcoholic solvent. Further, the alcohol solvent includes at least one of methanol, ethanol, 1-propanol and 2-propanol. The volume ratio of water to alcohol solvent may be 1: (0.1 to 1), such as 1:1.
In a specific embodiment of the present invention, the preparation of the Eu 3+ modified organic light conversion powder includes: dispersing or solvent the benzotriazole photo-conversion powder, the benzotriazole ultraviolet absorber and the Eu 3+ doped CdS quantum dot powder in a solvent, adding a silane coupling agent, silicate and hydrolysate, performing hydrolysis reaction, removing the solvent and drying to obtain the Eu 3+ modified organic photo-conversion powder. The hydrolysis reaction can be carried out at 25-70 ℃.
Wherein, the solvent used for preparing the Eu 3+ modified organic light-converting powder can comprise ethyl acetate and/or carbon tetrachloride.
In a specific embodiment of the present invention, the first auxiliary agent, the second auxiliary agent and the third auxiliary agent may each independently include the following components in parts by weight:
0.1 to 1.5 parts of silane coupling agent, 0.1 to 1 part of cross-linking agent, 0.1 to 1 part of auxiliary cross-linking agent, 0.1 to 1 part of acrylic monomer, 0.01 to 0.1 part of light stabilizer and 0.01 to 0.1 part of antioxidant.
As in the different embodiments, the amounts of the components in the first auxiliary agent, the second auxiliary agent, and the third auxiliary agent may be respectively as follows:
the silane coupling agent may be used in an amount ranging from 0.1 part, 0.5 part, 1 part, 1.2 parts, 1.5 parts, or any two thereof;
The amount of the crosslinking agent may be 0.1 part, 0.2 part, 0.5 part, 0.8 part, 1 part, or a range composed of any two thereof;
The amount of the auxiliary crosslinking agent may be 0.1 part, 0.2 part, 0.5 part, 0.8 part, 1 part or a range composed of any two of them;
The amount of acrylic monomer may be in the range of 0.1 part, 0.2 part, 0.5 part, 0.8 part, 1 part, or any two thereof;
The light stabilizer may be used in an amount ranging from 0.01 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, or any two thereof;
the antioxidant may be used in an amount ranging from 0.01 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, or any two thereof.
Wherein the silane coupling agent includes, but is not limited to, at least one of vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (beta-methoxyethoxy) silane, gamma-methacryloxypropyl trimethoxysilane, and vinyltris (beta-methoxyethoxy) silane; the crosslinking agent includes, but is not limited to, at least one of peroxide-based crosslinking agents; the co-crosslinking agent includes, but is not limited to, at least one of triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate, and trimethylolpropane triacrylate; antioxidants include, but are not limited to, at least one of hindered phenolic antioxidants; light stabilizers include, but are not limited to, at least one of hindered amine light stabilizers.
In a specific embodiment of the present invention, the ratio of the thicknesses of the support layer, the light conversion layer and the infrared reflection layer is 1: (1.5 to 2.5): (1.5 to 2.5).
As in the various embodiments, the ratio of the thicknesses of the carrier layer and the light conversion layer may be 1:1.5, 1:1.8, 1:2, 1:2.2, 1:2.5 or a range of any two thereof; the ratio of the thicknesses of the support layer and the infrared reflection layer may be 1:1.5, 1:1.8, 1:2, 1:2.2, 1:2.5, or a range of any two thereof.
In a specific embodiment of the invention, the thickness of the bearing layer is 0.05-0.2 mm; the thickness of the light conversion layer is 0.1-0.3 mm; the thickness of the infrared reflecting layer is 0.1-0.3 mm.
As in the various embodiments, the thickness of the carrier layer may be 0.05mm, 0.08mm, 0.1mm, 0.15mm, 0.2mm, or a range of any two of these; the thickness of the light conversion layer may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, or a range of any two of these; the thickness of the infrared reflective layer can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, or a range of any two of these.
The invention also provides a preparation method of the high-reflection packaging adhesive film for the battery assembly without the main grid, which comprises the following steps:
And carrying out coextrusion, stretching and traction on the bearing layer, the light conversion layer and the infrared reflection layer according to the raw material ratio, and then carrying out electron beam irradiation pre-crosslinking treatment on one side of the bearing layer to obtain the high-reflection packaging adhesive film.
In practice, the extrusion temperature of the carrier layer, the light conversion layer and the infrared reflecting layer may be 90 to 95 ℃.
In a specific embodiment of the present invention, in the electron beam irradiation pre-crosslinking treatment, the degree of pre-crosslinking is 1% to 60%.
As in the various embodiments, the degree of pre-crosslinking may be 1%, 5%, 10%, 15%, 20%, 30%, 40%, 50%, 60% or a range of any two of these compositions. In the electron beam irradiation pre-crosslinking treatment, the electron beam irradiation parameters are voltage 0.5MV, beam current 30mA and linear speed 30M/min.
The invention further provides a photovoltaic module, which comprises any one of the high-reflection packaging adhesive films for the main grid-free battery module.
In a specific embodiment of the invention, the photovoltaic module comprises at least one of the group HJT, TOPCon, BC of modules without a main grid.
In a specific embodiment of the invention, the photovoltaic module further comprises a cell and glass; the bearing layer in the packaging adhesive film is attached to the battery piece, and the infrared reflecting layer in the packaging adhesive film is attached to the glass.
The solar cell is contacted with the battery piece, the glass is contacted with the infrared reflecting layer, the solar cell is not made of EVA resin, the solar cell has higher water resistance, acetate ions are not easy to corrode the battery piece, and a large amount of Na ions are not formed by reaction with the surface of the glass; meanwhile, due to the three-layer adhesive film structure, the migration of Na ions can be effectively relieved by the multi-layer phase interface, and the PID attenuation of the assembly is reduced.
The high-reflection packaging adhesive film for the main-grid-free battery assembly is mainly used for the back surface of the main-grid-free battery assembly; for the no main grating HJT or TOPCon component, a conventional no main grating integral adhesive film is used on the front surface, and for the BC type no main grating component, a conventional high-permeability or cut-off EVA adhesive film is used on the front surface.
Example 1
The embodiment provides a no main grid battery pack is with high reflection encapsulation glued membrane, including the loading layer, light conversion layer and the infrared reflection layer that laminate in proper order and set up, the thickness of loading layer is 0.1mm, the thickness of light conversion layer is 0.2mm, the thickness of infrared reflection layer is 0.2mm.
The bearing layer comprises the following raw materials in parts by weight: 65 parts of TPO resin (Katalbot LDPE, model FD 0474), 35 parts of POE resin (Dow POE, model 38680), 0.3 part of Eu 3+ modified organic light conversion powder, 1 part of silane coupling agent, 0.5 part of cross-linking agent, 0.5 part of auxiliary cross-linking agent, 0.5 part of acrylic monomer, 0.05 part of light stabilizer and 0.05 part of antioxidant; the silane coupling agent is vinyl triethoxysilane, the cross-linking agent is tert-butyl peroxy-2-ethylhexyl carbonate, the auxiliary cross-linking agent is triallyl isocyanurate, the antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, and the light stabilizer is bis (2, 6-tetramethyl-4-piperidyl) sebacate.
The light conversion layer comprises the following raw materials in parts by weight: 100 parts of EVA resin, 0.3 part of Eu 3+ modified organic light conversion powder, 1 part of silane coupling agent, 0.5 part of cross-linking agent, 0.5 part of auxiliary cross-linking agent, 0.5 part of acrylic monomer, 0.05 part of light stabilizer and 0.05 part of antioxidant; the silane coupling agent is vinyl triethoxysilane, the cross-linking agent is tert-amyl peroxy (2-ethylhexyl) carbonate, the auxiliary cross-linking agent is triallyl isocyanurate, the antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, and the light stabilizer is bis (2, 6-tetramethyl-4-piperidyl) sebacate.
The infrared reflecting layer comprises the following raw materials in parts by weight: 100 parts of POE resin, 0.3 part of Eu 3+ modified organic light conversion powder, 0.5 part of rare earth manganese oxide YMnO 3 part, 1 part of silane coupling agent, 0.5 part of cross-linking agent, 0.5 part of auxiliary cross-linking agent, 0.5 part of acrylic acid monomer, 0.05 part of light stabilizer and 0.05 part of antioxidant; the silane coupling agent is vinyl triethoxysilane, the cross-linking agent is tert-butyl peroxy-2-ethylhexyl carbonate, the auxiliary cross-linking agent is triallyl isocyanurate, the antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, and the light stabilizer is bis (2, 6-tetramethyl-4-piperidyl) sebacate.
The preparation method of the Eu 3+ modified organic light conversion powder comprises the following steps:
(a) 2g of acrylamide, 0.1g of CdSO 4·8/3H2 O and 0.08g of ammonium persulfate are weighed and dissolved in 8g of deionized water, and stirred until dissolved, so as to prepare a water phase; 1.6g span 80 is weighed and dissolved in 40g cyclohexane, and the mixture is magnetically stirred for 10min to prepare an oil phase. Slowly pouring the water phase into the oil phase, and magnetically stirring and pre-emulsifying for 15min. And (3) carrying out ultrasonic treatment on the pre-emulsion for 5min, pouring the pre-emulsion into a four-neck flask, opening a stirrer, and carrying out water bath reaction for 4h at 65 ℃ under the protection of N 2 to obtain the CdSO 4 -PAM emulsion. AM conversion was about 99% as measured by gas chromatography;
(b) 0.094g of Na 2S·9H2 O and 0.3g of acrylamide are weighed and dissolved in 2g of deionized water, and stirred until the Na 2S·9H2 O and the acrylamide are dissolved, so that Na 2 S aqueous solution is obtained;
(c) Dropwise adding Na 2 S aqueous solution into CdSO 4 -PAM emulsion at a constant speed of 10mL/h through a microinjection pump, and then performing heat preservation and airtight reaction for 3h at 65 ℃ under the stirring action; 30g of EuCl 3·6H2 O was weighed and dissolved in 300g of deionized water to obtain an aqueous EuCl 3·6H2 O solution; dropwise adding EuCl 3·6H2 O aqueous solution at a constant speed of 100mL/h through a microinjection pump, and performing heat preservation and airtight reaction for 2h under the stirring action at 65 ℃ to obtain Eu 3+ doped CdS-PAM composite emulsion;
(d) Weighing the Eu 3+ doped CdS-PAM composite emulsion prepared in the step (c), pouring the emulsion into a polytetrafluoroethylene-lined hydrothermal reaction kettle, placing the kettle into a constant-temperature blast drying box for reaction for 6 hours at the temperature of 100 ℃, performing centrifugal separation treatment, washing the obtained precipitate with absolute ethyl alcohol for 2 times, and then placing the obtained precipitate into a 50 ℃ vacuum drying box for drying for 10 hours to obtain Eu 3+ doped CdS quantum dot powder;
(e) Weighing 100 parts by weight of benzotriazole light conversion powder shown in a formula I, 5 parts by weight of UV-329 and 5 parts by weight of Eu 3+ doped CdS quantum dot powder, adding into 10mL of ethyl acetate, and uniformly mixing; then 5 parts by weight of tetraethoxysilane, 3 parts by weight of 3-methacryloxypropyl trimethoxysilane and 0.5 part by weight of water/ethanol mixed solution (the volume ratio of ethanol to water is 1:1) are added, the ultrasonic treatment is carried out at room temperature for 30min, the solvent is removed by rotary evaporation at 65 ℃ and the Eu 3+ modified organic light-transmitting powder is obtained.
The preparation method of the high-reflection packaging adhesive film for the main-grid-free battery assembly comprises the following steps: the method comprises the steps of respectively throwing the bearing layer, the light conversion layer and the infrared reflection layer into three barrels according to the raw material composition of the bearing layer, the light conversion layer and the infrared reflection layer, respectively carrying out melt extrusion on three materials through three independent dies of ABC, throwing the bearing layer mixed in proportion into an A machine, and setting the temperature of each area of a single screw extruder to be: 60-70 ℃ in the area I, 70-80 ℃ in the area II, 75-90 ℃ in the area III, 75-90 ℃ in the area IV, 75-90 ℃ in the area V, 80-100 ℃ in the area VI, 80-100 ℃ in the area VII, 85-110 ℃ in the area VIII, 85-110 ℃ in the area IX and 120 ℃ in the area head; the light conversion layer and the infrared reflection layer mixed in proportion are respectively put into a machine B and a machine C, and the temperatures of all areas of the single screw extruder are set as follows: 60-70 ℃ in the area I, 70-80 ℃ in the area II, 75-90 ℃ in the area III, 75-90 ℃ in the area IV, 75-90 ℃ in the area V, 80-90 ℃ in the area VI, 80-90 ℃ in the area VII, 80-90 ℃ in the area VIII, 80-90 ℃ in the area IX, 80-90 ℃ in the area head area 90 ℃; the ABC three dies are subjected to melt coextrusion, drawing and traction, and are rolled, and the total thickness of the packaging adhesive film is 0.5mm; and then carrying out electron beam irradiation pre-crosslinking treatment on one side of the bearing layer of the packaging adhesive film at the electron beam irradiation parameter of 0.5MV, the beam current of 30mA and the linear speed of 30M/min, wherein the pre-crosslinking degree is 30%, so as to obtain the high-reflection packaging adhesive film.
Example 2
The difference between the high-reflection packaging adhesive film for the cell module without the main grid and the preparation method of the embodiment is that: in the preparation of Eu 3+ modified organic light conversion powder, the benzotriazole light conversion powder adopted in the step (e) is different.
In this example, the benzotriazole light conversion powder of formula II in example 1 was replaced with an equivalent weight of the benzotriazole light conversion powder of formula I.
Example 3
The difference between the high-reflection packaging adhesive film for the cell module without the main grid and the preparation method of the embodiment is that: eu 3+ modified organic light conversion powder in the infrared reflecting layer and rare earth manganese oxide are different in dosage.
In this example, the Eu 3+ modified organic light conversion powder was used in an amount of 0.5 parts and the rare earth manganese oxide YMnO 3 parts.
Example 4
The difference between the high-reflection packaging adhesive film for the cell module without the main grid and the preparation method of the embodiment is that: eu 3+ modified organic light conversion powder in the infrared reflecting layer and rare earth manganese oxide are different in dosage.
In this example, eu 3+ modified organic light conversion powder was used in an amount of 0.05 parts and rare earth manganese oxide YMnO 3 0.5.5 parts.
Example 5
The difference between the high-reflection packaging adhesive film for the cell module without the main grid and the preparation method of the embodiment is that: in the preparation of Eu 3+ modified organic light conversion powder, the step (b) and the step (c) are different.
Step (b) of the present embodiment includes: 0.094g of Na 2S·9H2 O and 0.3g of acrylamide are weighed and dissolved in 2g of deionized water, and stirred until the Na 2S·9H2 O and the acrylamide are dissolved, so that Na 2 S aqueous solution is obtained; weighing 0.4g span 80, dissolving in 10g cyclohexane, magnetically stirring for 10min, and preparing into oil phase; slowly pouring the Na 2 S aqueous solution into the oil phase, magnetically stirring and pre-emulsifying for 15min, and performing ultrasonic treatment for 5min to obtain Na 2 S miniemulsion.
Step (c) of the present embodiment includes: dropwise adding the Na 2 S miniemulsion prepared in the step (b) into the CdSO 4 -PAM emulsion at a constant speed of 10mL/h through a microinjection pump, and then performing heat preservation and airtight reaction for 3h under the stirring action at 65 ℃; 5g of EuCl 3·6H2 O was weighed and dissolved in 300g of deionized water to give an aqueous EuCl 3·6H2 O solution; and then dripping EuCl 3·6H2 O aqueous solution at a constant speed of 100mL/h by a microinjection pump, and performing heat preservation and airtight reaction for 2h at 65 ℃ under the stirring action to obtain the Eu 3+ doped CdS-PAM composite emulsion.
Example 6
The difference between the high-reflection packaging adhesive film for the cell module without the main grid and the preparation method of the embodiment is that: the Eu 3+ doped CdS quantum dot powder has different preparation methods.
The preparation of the Eu 3+ doped CdS quantum dot powder of the embodiment comprises the following steps: two steps of CdS quantum dot powder preparation and Eu 3+ doping are carried out.
Preparation of CdS quantum dots: cadmium nitrate and thioacetamide are used as raw materials, N-acetyl-L-cysteine (NAC) is used as a stabilizer, and CdS quantum dots are synthesized in an aqueous solution. Sequentially adding 0.1mol/L Cd (5 mL of NO 3)2 aqueous solution, 2.5mL of 0.1mol/L NAC aqueous solution and 35mL of three times deionized water into a conical flask, stirring to be uniform, adjusting the pH to 7 by using ammonia water, stirring for 10min, slowly dropwise adding 8mL of thioacetamide, reacting at 80 ℃ for 2h after dropwise adding, standing, cooling to room temperature to obtain colorless transparent solution, precipitating by using absolute ethyl alcohol, centrifuging, separating, and vacuum drying the precipitate to obtain 0.059g of light yellow powder CdS quantum dot powder.
Eu 3+ doped CdS quantum dots are prepared: dissolving the prepared CdS quantum dot powder in 100mL of deionized water, weighing 30g of EuCl 3·6H2 O, and dissolving in 300g of deionized water to obtain EuCl 3·6H2 O aqueous solution; and then dripping EuCl 3·6H2 O aqueous solution at a constant speed of 100mL/h by a microinjection pump, performing heat preservation and airtight reaction for 2h at 65 ℃ under the stirring action, and then placing the mixture into a vacuum drying oven at 50 ℃ for drying for 10h to obtain Eu 3+ doped CdS quantum dot powder.
Comparative example 1
Comparative example 1a high reflection packaging film for a no-main-grid battery module of reference example 1 and a manufacturing method thereof are distinguished in that: the Eu 3+ modified organic light-converting powder in example 1 was replaced with an equal weight of the first modified organic light-converting powder in each of the three layers in comparative example 1.
The preparation of the first modified organic light-converting powder in comparative example 1 includes: weighing 100 parts by weight of benzotriazole light conversion powder shown in formula I, 5 parts by weight of UV-329 and 5 parts by weight of CdS quantum dot powder, adding into 10mL of ethyl acetate, and uniformly mixing; then 5 parts by weight of tetraethoxysilane, 3 parts by weight of 3-methacryloxypropyl trimethoxysilane and 0.5 part by weight of water/ethanol mixed solution (the volume ratio of ethanol to water is 1:1) are added, the ultrasonic treatment is carried out at room temperature for 30min, the solvent is removed by rotary evaporation at 65 ℃ and the mixture is dried, and the first modified organic light-transmitting powder is obtained.
Comparative example 2
Comparative example 2 the high reflection packaging film for a no-main-grid battery module of reference example 1 and the manufacturing method thereof are different in that: the Eu 3+ modified organic light-converting powder in example 1 was replaced with an equal weight of the second modified organic light-converting powder in each of the three layers in comparative example 2.
The preparation of the second modified organic light-converting powder in comparative example 2 includes: weighing 100 parts by weight of benzotriazole light conversion powder shown in a formula I, 5 parts by weight of UV-329 and 15 parts by weight of Eu 3+ doped CdS quantum dot powder, adding into 10mL of ethyl acetate, and uniformly mixing; then 5 parts by weight of tetraethoxysilane, 3 parts by weight of 3-methacryloxypropyl trimethoxysilane and 0.5 part by weight of water/ethanol mixed solution (the volume ratio of ethanol to water is 1:1) are added, the ultrasonic treatment is carried out at room temperature for 30min, the solvent is removed by rotary evaporation at 65 ℃ and the second modified organic light-transmitting powder is obtained.
Comparative example 3
Comparative example 3 the high reflection packaging film for a no-main-grid battery module of reference example 1 and the manufacturing method thereof are different in that: the infrared reflecting layer has different raw material compositions.
The infrared reflecting layer of comparative example 3 does not include rare earth manganese oxide YMnO 3.
Comparative example 4
Comparative example 4 the high reflection packaging film for a no-main-grid battery module of reference example 1 and the manufacturing method thereof are different in that: the infrared reflecting layer has different raw material compositions.
In the infrared reflecting layer of comparative example 4, the rare earth manganese oxide YMnO 3 was used in an amount of 15 parts.
Experimental example 1
To comparatively illustrate the performance differences of the packaging adhesive films of the different examples and the comparative examples, the infrared light reflectivity and the water vapor transmittance of the packaging adhesive films of the different examples and the comparative examples were tested, and the packaging adhesive films of the different examples and the comparative examples were respectively prepared into photovoltaic module samples to be tested, and the test results are shown in table 1 with reference to the following test methods.
Reflectance test: respectively testing the reflectivity of lambda950 700-1100 nm by adopting an ultraviolet-visible spectrophotometer;
And (3) testing the water vapor permeability, namely testing the water vapor permeability by adopting a model C390H water vapor permeability tester according to the standard GB/T21529-2008, and measuring the water vapor permeability by adopting an infrared sensor method under the testing condition of 38 ℃ and 90% relative humidity.
Assembly laminate EL test (electroluminescence) test: the packaging adhesive film samples in the examples and the comparative examples are compounded in the order of glass from top to bottom, high-reflection packaging adhesive film for a main-grid-free battery assembly, 0BBHJT battery, high-reflection packaging adhesive film for a main-grid-free battery assembly and glass, laminated for 10min at 140 ℃, and the laminated assembly is tested for EL according to IEC 61215&61730 test standards.
And (3) testing the temperature rise, the component power rise and the component PID test of the photovoltaic component according to the standard IEC61215 and IEC61730 by adopting a conventional method of the photovoltaic component. The battery piece adopted in the test is 166HJT battery pieces of gold stone, and the glass adopts ultra-white embossed toughened glass.
TABLE 1 test results of different packaging films
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As can be seen from the test results, the high-reflection packaging adhesive film is suitable for the back surface of the main-grid-free assembly, can fix welding wires and avoid the problems of virtual connection and the like; meanwhile, the anti-aging device has higher capabilities of blocking water vapor and shielding ultraviolet rays, improves the ageing resistance of the assembly, has lower PID attenuation, can prolong the service life, can improve the generation power of the assembly by about 2%, and can play a role of heat insulation and reduction of the generation temperature of the assembly.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. The high-reflection packaging adhesive film for the main-grid-free battery assembly is characterized by comprising a bearing layer, a light conversion layer and an infrared reflection layer which are sequentially laminated;
The bearing layer is mainly prepared from the following components in parts by weight: 50 to 80 parts of TPO resin, 20 to 50 parts of POE resin, 0.05 to 0.5 part of Eu 3+ modified organic light conversion powder and 0.42 to 4.7 parts of first auxiliary agent;
the light conversion layer is mainly prepared from the following components in parts by weight: 100 parts of EVA resin, 0.05-0.5 part of Eu 3+ modified organic light conversion powder and 0.42-4.7 parts of second auxiliary agent;
The infrared reflecting layer is mainly prepared from the following components in parts by weight: 100 parts of POE resin, 0.05 to 0.5 part of Eu 3+ modified organic light conversion powder, 0.5 to 10 parts of rare earth manganese oxide and 0.42 to 4.7 parts of third auxiliary agent;
The Eu 3+ modified organic light conversion powder is mainly prepared from the following components in parts by weight: 100 parts of benzotriazole light conversion powder, 1-10 parts of benzotriazole ultraviolet absorber, 1-10 parts of Eu 3+ doped CdS quantum dot powder, 0.1-5 parts of silane coupling agent, 0.1-10 parts of silicate, 0.1-1 part of hydrolysate and 5-20 parts of solvent.
2. The high-reflection packaging adhesive film according to claim 1, wherein the benzotriazole optical transition powder comprises at least one compound shown in the following structures of formulas I-II:
And/or, the rare earth manganese oxide is YMO 3.
3. The high reflection packaging film according to claim 1, wherein the preparation of the Eu 3+ doped CdS quantum dot powder comprises:
(a) Mixing and dissolving water-soluble Cd salt, acrylamide and an initiator in water to obtain a water phase; dissolving a nonionic surfactant in an organic solvent to obtain an oil phase; adding the water phase into the oil phase, stirring for pre-emulsification, and then reacting for 2-6 hours at 60-80 ℃ under a protective atmosphere to obtain Cd salt-PAM emulsion;
(b) Adding a solution containing sodium sulfide and acrylamide into the Cd salt-PAM emulsion, reacting for 2-4 hours at 60-80 ℃, then adding an aqueous solution containing water-soluble Eu salt, and reacting for 1-3 hours at 60-80 ℃ to obtain a CdS-PAM composite emulsion doped with Eu 3+;
(c) And carrying out hydrothermal reaction on the Eu 3+ doped CdS-PAM nano emulsion, collecting solids, and drying to obtain the Eu 3+ doped CdS quantum dot powder.
4. The high reflection packaging film according to claim 3, wherein the water-soluble Cd salt comprises CdSO 4·8/3H2 O;
Preferably, in the step (a), the mass ratio of the water-soluble Cd salt to the acrylamide is 1: (15-25);
Preferably, the initiator is ammonium persulfate; the mass of the initiator is 1-10wt% of that of the acrylamide.
5. The high reflection packaging film according to claim 3, wherein the nonionic surfactant comprises span 80;
preferably, the organic solvent comprises cyclohexane;
Preferably, the mass ratio of the nonionic surfactant to the organic solvent is 1: (20 to 30).
6. The high-reflection packaging adhesive film according to claim 3, wherein the mass ratio of sodium sulfide to acrylamide in the solution containing sodium sulfide and acrylamide is 1: (2-4);
preferably, the solution containing sodium sulfide and acrylamide is an aqueous solution or emulsion;
preferably, when the solution containing sodium sulfide and acrylamide is an emulsion, the emulsion further comprises a nonionic surfactant and an organic solvent.
7. The high reflection packaging adhesive film according to claim 3, wherein in the step (b), the mass ratio of the solution containing sodium sulfide and acrylamide to the Cd salt-PAM emulsion is 1: (2-20);
Preferably, in step (b), the amount of the water-soluble Eu salt used in the aqueous solution containing the water-soluble Eu salt is 0.5 to 15 times the mass of the acrylamide in step (a);
Preferably, the preparation of the Eu 3+ modified organic light conversion powder comprises the following steps: dispersing or dissolving the benzotriazole optical transfer powder, the benzotriazole ultraviolet absorber and the Eu 3+ doped CdS quantum dot powder in a solvent, adding a silane coupling agent, silicate and hydrolysate, performing hydrolysis reaction, removing the solvent and drying to obtain the Eu 3+ modified organic optical transfer powder.
8. The film of claim 1, wherein the ratio of the thicknesses of the light conversion layer and the infrared reflection layer is 1: (1.5-2.5): (1.5-2.5);
preferably, the thickness of the bearing layer is 0.05-0.2 mm;
Preferably, the thickness of the light conversion layer is 0.1-0.3 mm;
preferably, the thickness of the infrared reflecting layer is 0.1-0.3 mm.
9. The method for preparing the high reflection packaging adhesive film according to any one of claims 1 to 8, which is characterized by comprising the following steps:
Carrying out coextrusion, stretching and traction on the bearing layer, the light conversion layer and the infrared reflection layer according to the raw material ratio, and then carrying out electron beam irradiation pre-crosslinking treatment on one side of the bearing layer;
preferably, in the electron beam irradiation pre-crosslinking treatment, the pre-crosslinking degree is 1% -60%.
10. A photovoltaic module comprising the highly reflective encapsulating film according to any one of claims 1 to 8 or the highly reflective encapsulating film produced by the production method according to claim 9.
CN202410157269.4A 2024-02-04 2024-02-04 High-reflection packaging adhesive film for main-grid-free battery assembly, preparation method of high-reflection packaging adhesive film and photovoltaic assembly Pending CN117887377A (en)

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