Fireproof building glass magnesium board integrated with solar photovoltaic power generation

Abstract

The invention discloses a fireproof building glass magnesium board integrated with solar photovoltaic power generation and a preparation method of the fireproof building glass magnesium board, and through collaborative innovation of a glass magnesium board substrate, a pre-welded battery piece and a UV curing epoxy resin protection layer, a photovoltaic module with light weight, multiple functions, rapid curing and high fireproof performance of a building material is realized. The composite material is suitable for the scenes of building outdoor wall surfaces, roofs, carports, outdoor sound insulation walls, isolation belts, military construction sites, agricultural infrastructure construction and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and in particular to a fireproof building glass magnesium board integrated with solar photovoltaic power generation and a preparation method thereof. The fireproof building glass magnesium board is particularly suitable for building-integrated fireproof photovoltaic power generation and is easy to install. Background Art

[0002] Traditional solar panel substrates are usually made of glass or polymer materials and have the following defects: 1. Glass substrates have problems such as heavy weight (≥15kg / ㎡), easy to break, and high installation cost; 2. Polymer substrates: poor weather resistance (easy to age and yellow), low fire protection level (usually below B1 level).

[0003] Magnesium Oxychloride Cement Board (MOC Board) is a multifunctional inorganic fireproof board made primarily of magnesium oxide and magnesium chloride as the primary binder, supplemented with plant fibers (such as sawdust and straw) or inorganic reinforcements (such as glass fiber). MOC Board (magnesium oxide-magnesium chloride cement board) is lightweight (8-12 kg / m2) and offers A1-grade fire, moisture, and corrosion resistance. It is widely used in building renovations and integrated construction.

[0004] However, in the existing technology, there are still unresolved difficulties in the application of glass magnesium boards in the photovoltaic field: 1. Insufficient surface flatness leads to failure of cell adhesion; 2. There is a lack of a fast-curing protective layer solution that matches the cell packaging process; 3. The sealing structure between the substrate and the frame has weak wind pressure resistance. Summary of the Invention

[0005] To address the problems of the prior art, the present invention provides a photovoltaic module structure with a glass magnesium board as the core substrate. By optimizing the substrate surface treatment, protective layer curing process, and packaging design, it achieves lightweight, high weather resistance, and rapid production. Through material and process innovation, it solves the problems of traditional photovoltaic modules such as heavy weight, easy aging, and long production cycle. Specifically:

[0006] In a first aspect, the present invention provides a fireproof architectural glass magnesium board with integrated solar photovoltaic power generation, comprising: a glass magnesium board substrate, an epoxy insulation layer, a functional enhancement layer, a solar cell and a UV-curing epoxy resin encapsulation layer; the UV-curing epoxy resin is composed of bisphenol A epoxy resin, aliphatic polyurethane acrylate, 1,6-hexanediol diacrylate and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide.

[0007] Optionally, the function enhancement layer contains nano-alumina, a silane coupling agent and a BYK-345 wetting agent; in a mixed solution containing a nano-alumina suspension, a hydrolyzed silane coupling agent and a BYK-345 wetting agent, the particle size of the nano-alumina is 30 nm, accounting for 5% of the total mass of the solution; the silane coupling agent accounts for 3% of the total mass of the solution; and the BYK-345 wetting agent accounts for 0.1% of the total mass of the solution.

[0008] Optionally, the solar cell sheets are polycrystalline silicon cell sheets, and the polycrystalline silicon cell sheets are arranged in a 6×6 matrix and placed on the surface of the treated glass magnesium board substrate.

[0009] Optionally, in the UV-curable epoxy resin, bisphenol A epoxy resin accounts for 48.25% to 56.5% of the total mass of the resin mixture, aliphatic polyurethane acrylate accounts for 28.2% to 35.2% of the total mass of the resin mixture, 1,6-hexanediol diacrylate accounts for 9.4% to 12.0% of the total mass of the resin mixture, and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide accounts for 3.0% to 5.9% of the total mass of the resin mixture.

[0010] In a second aspect, the present invention provides a method for preparing an integrated solar cell panel based on a glass magnesium board substrate, the steps comprising:

[0011] S1. Prepare a glass magnesium board substrate: prepare a substrate bottom plate, a substrate middle plate, and a substrate top plate layer by layer to obtain a semi-finished glass magnesium board substrate; and after curing the semi-finished glass magnesium board, obtain a glass magnesium board substrate;

[0012] S2. Pre-treating the surface of the glass magnesium board: After cutting the glass magnesium board prepared in S1, the glass magnesium board is polished with a double-stage sanding belt, and then plasma cleaning is performed;

[0013] S3, coating insulation layer: spray insulating epoxy primer with high pressure airless spray on the surface of glass magnesium board pretreated in S2, and cure after hot air circulation baking;

[0014] S4, functional layer enhancement: Prepare a mixed solution containing nano-alumina suspension, hydrolyzed silane coupling agent, and BYK-345 wetting agent, and evenly spread the mixed solution on the S3 insulating layer using spin coating. Then, spin at high speed to remove excess solution. The surface energy is increased through Si-O-Mg chemical bonding, which promotes subsequent film wetting.

[0015] S5. Install the cells: Divide the cells into sections, apply UV glue to the four corners, and initially solidify. Arrange the pre-soldered polysilicon cells in a 4×9 matrix on the UV glue surface, and connect the cells in series with tinned copper wires.

[0016] S6. Prepare a resin mixed solution containing bisphenol A epoxy resin, aliphatic polyurethane acrylate and 1,6-hexanediol diacrylate, pre-treat bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and add it to the resin mixed solution, and stir it in the dark; use a slit coater to accurately apply the above resin mixed solution along the gap between the battery cells after preliminary curing treatment in S5; use UV-LED curing and UV irradiation in stages; after hot air treatment and vacuum degassing treatment, install an aluminum alloy frame, inject silicone glue to seal, and let it stand to obtain an integrated solar cell panel based on a glass magnesium board.

[0017] Furthermore, S2 double-stage belt grinding is performed from 400 mesh coarse grinding to 800 mesh fine grinding, so that the surface roughness Ra ≤ 1.2μm and the flatness error is < 0.3mm / m 2 The plasma cleaning conditions were 500 W power and 10 L / min argon flow for 3 minutes.

[0018] Optionally, in S2, the spray gun pressure is 20-25 MPa, the insulating epoxy primer has a thickness of 50 μm, a solid content of 60-65%, and the hot air circulation baking condition is 80° C. for 20 minutes;

[0019] Optionally, the spin coating method is carried out under the conditions of low speed rotation of 500 rpm for 10 seconds, and then high speed rotation of 3000 rpm for 30 seconds to shake off excess solution;

[0020] Optionally, the bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide pretreatment is to dissolve (2,4,6-trimethylbenzoyl)phenylphosphine oxide in 1% of the total amount of 1,6-hexanediol diacrylate, ultrasonically disperse at 40kHz, and then add the resin system after 10 minutes;

[0021] The UV-LED curing is divided into the following stages: using a UV-LED curing machine to irradiate with 400mW / cm UV for 5 seconds to form a gel state; irradiating with 1500mW / cm UV for 15-30 seconds (energy density 22.5J / cm2); and treating with hot air at 80°C for 10 minutes to eliminate internal stress.

[0022] In a third aspect, the present invention provides an application of a fireproof building glass magnesium board integrated with solar photovoltaic power generation in building exterior walls, rooftop photovoltaic systems, and agricultural facility photovoltaic systems.

[0023] The beneficial effects brought about by the technical solution provided by the present invention include at least:

[0024] Improved production efficiency of epoxy resin coating: Epoxy resin mixed with photoinitiator is evenly coated on the surface of the battery layer. The UV curing process replaces the traditional lamination process (which takes more than 2 hours), reducing the production time of a single piece to less than 1 minute.

[0025] Substrate-protective layer collaborative design: The combination of a glass magnesium board surface insulation layer and a UV-cured epoxy resin protective layer enables the module to have a light transmittance greater than 92% (conventional process less than 90%) and a shrinkage rate less than 1.5%;

[0026] Pre-soldering of battery cells: Use tinned copper wires to pre-connect the battery cells according to the designed circuit, and reserve interfaces at the ends of the wires to reduce the complexity of on-site installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 Schematic diagram of the structure of the fireproof building glass magnesium board integrated with solar photovoltaic power generation;

[0029] Among them, 1. Glass magnesium board substrate layer;

[0030] 2. Battery layer;

[0031] 3. Epoxy resin protective layer. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.

[0033] In the examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used can be purchased from commercial channels unless otherwise specified.

[0034] In the following examples, EPON 828 bisphenol A epoxy resin was purchased from Guangzhou Daixun Trading Co., Ltd., aliphatic polyurethane acrylate CN966J75 was purchased from Sartomer (Guangzhou) Chemical Co., Ltd., and 1,6-hexanediol diacrylate (HDDA) CAS No. 13048-33-4 was purchased from Zhongshan Dixin Chemical Co., Ltd.

[0035] Example 1

[0036] Preparation of glass magnesium board substrate

[0037] (1) Prepare base material

[0038] Mix the following materials by weight to form the base:

[0039] 60 parts of magnesium oxide;

[0040] 15 parts of magnesium sulfate;

[0041] 6 parts of trisodium phosphate (modifier);

[0042] 83 parts water;

[0043] (2) Prepare the intermediate material

[0044] Mix the following materials by weight to form the medium batch:

[0045] 320 parts of magnesium oxide;

[0046] 80 parts of magnesium sulfate;

[0047] 5 parts of superfine calcium carbonate (foaming agent);

[0048] 525 parts of water;

[0049] 80 parts of wood flour;

[0050] 32 parts perlite powder;

[0051] 7 parts of sodium hexametaphosphate (modifier);

[0052] (3) Fabric configuration

[0053] The following materials are mixed by weight to form the fabric:

[0054] 80 parts of magnesium oxide;

[0055] 20 parts of magnesium sulfate;

[0056] 5 parts of superfine calcium carbonate (foaming agent);

[0057] 130 parts water;

[0058] 20 parts of woodworking powder;

[0059] The base material, middle material and top material were placed in a cantilever mixer and stirred at a stirring speed of 200 rpm.

[0060] (1) Preparation of semi-finished glass magnesium board substrate

[0061] First, add 9 parts of negative ion powder nanometer (accounting for 5.2% of the base material) into the above base material slurry to prepare the glass magnesium board substrate.

[0062] (4) Prepare base material

[0063] Mix the following materials by weight to form the base:

[0064] 60 parts of magnesium oxide;

[0065] 15 parts of magnesium sulfate;

[0066] 6 parts of trisodium phosphate (modifier);

[0067] 83 parts water;

[0068] (5) Prepare the intermediate material

[0069] Mix the following materials by weight to form the medium batch:

[0070] 320 parts of magnesium oxide;

[0071] 80 parts of magnesium sulfate;

[0072] 5 parts of superfine calcium carbonate (foaming agent);

[0073] 525 parts of water;

[0074] 80 parts of wood flour;

[0075] 32 parts perlite powder;

[0076] 7 parts of sodium hexametaphosphate (modifier);

[0077] (6) Fabric configuration

[0078] The following materials are mixed by weight to form the fabric:

[0079] 80 parts of magnesium oxide;

[0080] 20 parts of magnesium sulfate;

[0081] 5 parts of superfine calcium carbonate (foaming agent);

[0082] 130 parts water;

[0083] 20 parts of woodworking powder;

[0084] The base material, middle material and top material were placed in a cantilever mixer and stirred at a stirring speed of 200 rpm.

[0085] (2) Preparation of semi-finished glass magnesium board substrate

[0086] First, add 9 parts of negative ion nanopowder (5.2% of the base material) to the above base material slurry and stir at 2000 rpm to ensure uniformity to obtain a mixed base material. Pour the base material slurry into the mold plate of the molding machine. The molding machine is equipped with two layers of low-alkali glass fiber cloth, with the base material slurry placed between the upper and lower layers of low-alkali glass fiber cloth, and roll-formed. The temperature is 30°C and the pressure is 19 MPa to obtain the base material bottom plate.

[0087] Add the prepared intermediate material to the base plate surface, then add 91 parts of negative ion powder (8.0% of the intermediate material), stirring at 2000 rpm to ensure uniformity, to obtain a mixed intermediate material. Pour the intermediate material onto the base plate of the molding machine, place a layer of low-alkali glass fiber cloth on top, and roll-press at a temperature of 30°C and a pressure of 19 MPa to obtain the base plate.

[0088] The prepared fabric was then added to the substrate mid-panel, along with 9 parts of negative ion powder (3.4% of the total fabric content). The mixture was then stirred at 2000 rpm to ensure uniformity. This mixture was then poured onto the substrate mid-panel of the molding machine, topped with a layer of low-alkali glass fiber cloth, and rolled into shape. The temperature was set at 30°C and the pressure was 19 MPa to form the substrate panel, resulting in the semi-finished glass magnesium substrate board.

[0089] The semi-finished glass magnesium board is placed for static curing at a temperature of 40°C and a humidity of 65%. It is demoulded after 24 hours and cured in a natural environment for 7 days. The cured semi-finished glass magnesium board is soaked in water for 48 hours and then dried to obtain a glass magnesium board.

[0090] Example 2: Construction of glass magnesium board-cell composite interface

[0091] 2.1 Pretreatment of the surface of the glass magnesium board: The glass magnesium board prepared in Example 1 was cut into a thickness of 5-8 mm, and the size of the glass magnesium board was 1500 mm × 1200 mm. Double-stage sanding belt grinding (400 mesh coarse grinding → 800 mesh fine grinding) was used to make the surface roughness Ra ≤ 1.2 μm and the flatness error < 0.3 mm / m 2 Plasma cleaning (power 500W, argon flow rate 10L / min) for 3 minutes increases the surface hydroxyl (-OH) density and improves bonding activity.

[0092] 2.2 Coating the insulating layer: Apply high-pressure airless spray (spray gun pressure 20-25 MPa) of insulating epoxy primer (thickness 50 μm, solid content 60-65%) on the surface of the glass magnesium board pretreated in step 2.1, and bake it in hot air circulation at 80°C for 20 minutes. After curing, the insulation resistance is greater than 100 MΩ.

[0093] 2.3 Functional layer enhancement: Nano-alumina was added to anhydrous ethanol and treated with an ultrasonic disperser (power 600W, frequency 40kHz) for 30 minutes to ensure that the particle agglomerate size was less than 100nm; the particle size was 30nm and the nano-alumina accounted for 5wt% of the total mass of the solution;

[0094] The silane coupling agent was mixed with deionized water (molar ratio 1:4) to account for 3wt% of the total mass of the solution, and stirred and hydrolyzed at 50°C for 2 hours to generate active silanol (Si-OH);

[0095] The dispersed nano-alumina suspension, hydrolyzed silane coupling agent, and 0.1% BYK-345 wetting agent were mixed and magnetically stirred for 1 hour to form a uniform solution.

[0096] Use spin coating to evenly spread the solution onto the insulating layer from step 2.2 by spinning at a low speed (500 rpm for 10 seconds). Then, spin at a high speed (3000 rpm for 30 seconds) to remove excess solution, maintaining a wet film thickness of 5-8 μm. The surface energy is increased to 52 mN / m (contact angle <10°) through Si-O-Mg chemical bonding, promoting subsequent film wetting.

[0097] Example 3: Installation of Solar Cells

[0098] The cells are divided into bins according to open circuit voltage (Voc) ±1% and short circuit current (Isc) ±1.5%. The deviation of the electrical parameters of the cells in the same component is ≤2%, and the cells are divided into bins.

[0099] A CCD camera (5 μm resolution) was used to identify the fiducial marks on the glass magnesium plate. The fiducial marks were dotted with solid UV glue (Loctite 3525) at the four corners and irradiated with 365 nm UV for 3 seconds (200 mW / cm 2 ) is initially cured. 156mm×156mm polycrystalline silicon cells (36 pieces) with pre-soldered wires are arranged in a 4×9 matrix on the surface of the UV glue. The main grid lines of adjacent cells are 2mm apart and connected by "Z-type jumper" tinned copper welding strips (span ≤ 5mm, bending radius ≥ 3 times the wire diameter), that is, the cells are connected in series through tinned copper wires; a parallel jumper (cross-sectional area 0.5mm) is set for every 12 cells. 2 ) to reduce the risk of hot spots; apply conductive silver paste (containing 85% silver, resistivity <5×10 -6 Ω·cm), cured at 150℃ for 10 minutes; ultrasonic welding (frequency 40kHz, pressure 20N) was performed on key nodes (such as the end of the string) to ensure that the contact resistance was less than 0.01Ω.

[0100] An electroluminescent imager (resolution 100 μm) scans the cell to identify defects such as microcracks and broken grids (detection sensitivity > 0.5 mm cracks).

[0101] Example 4 UV curing epoxy resin formulation and packaging process

[0102] The mass ratio of each component of the improved epoxy resin system to the mixture is shown in Table 1 below:

[0103] Table 1

[0104] Components Preparation Example 1 Preparation Example 2 Preparation Example 3 EPON 828 55.0％ 48.25％ 56.5％ CN966J75 30.0％ 35.2％ 28.2％ HDDA 12.0％ 12.4％ 9.4％ Irgacure 819 3.0％ 4.15％ 5.9％

[0105] EPON 828 bisphenol A epoxy resin and aliphatic polyurethane acrylate CN966J75 were added to a stainless steel reactor, heated in a 60° C. water bath, and stirred in a paddle stirrer at 300 rpm until completely homogenized for about 30 minutes.

[0106] After cooling to 40° C., 1,6-hexanediol diacrylate HDDA was slowly added and stirring was continued for 20 minutes until the viscosity stabilized at 1500±200 cps (Brookfield DV2T viscometer, spindle #63, 25° C.).

[0107] Dissolve Irgacure 819 bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide in a small amount of HDDA (1% of the total amount), disperse ultrasonically at 40kHz for 10 minutes, then add the resin system and stir for 1 hour in the dark.

[0108] After the temporary fixation treatment in Example 3, the epoxy resin was precisely coated along the gaps between the cells using a slit coater, with a wet film thickness of 300-320 μm and covering the cell edge by ≥1 mm.

[0109] Use a UV-LED curing machine to irradiate with 400mW / cm UV for 5 seconds to form a gel state; irradiate with 1500mW / cm UV for 15-30 seconds (energy density 22.5J / cm2); and use 80℃ hot air treatment for 10 minutes to eliminate internal stress.

[0110] Vacuum degassing for 10 min under -0.095 MPa conditions.

[0111] Install 6063 aluminum alloy frame, inject silicone sealant to seal, and after standing for 24 hours, conduct IV characteristic test. The conversion efficiency is ≥17.5%, the finished product weight is 11.2kg / ㎡, and it has passed IEC 61730 fire protection certification.

[0112] Example 5 Traditional EVA thermal lamination packaging process

[0113] After constructing the glass magnesium board-cell composite interface in Example 2, cut the EVA film (thickness 0.5mm) and reserve a window for the cell position (tolerance ±0.2mm); drill 1mm diameter microholes (spacing 20mm) in the non-cell area to facilitate gas discharge during lamination. Preheat at 50°C for 30 minutes and reduce the humidity to <15% (to prevent water vapor from generating bubbles during lamination). Use a CCD camera (accuracy ±0.1mm) to identify the edge of the glass magnesium board and the EVA film marking point, achieving an alignment accuracy of ±0.3mm; and temporarily fix the EVA film to the surface of the glass magnesium board using a porous ceramic suction cup (vacuum degree -80kPa).

[0114] A silicone roller (hardness Shore A 60) was used to roll the film back and forth three times at a pressure of 0.2 MPa and a speed of 5 m / min to preliminarily remove air. An online infrared thermal imager (resolution 0.1°C) was used to monitor the temperature uniformity of the film (temperature difference ≤ 2°C) to avoid local pre-curing.

[0115] After the above operation, the EVA film is spread flat on the surface of the treated glass magnesium board; a vacuum laminator (temperature 150℃±5℃, pressure 0.9MPa) is used to maintain it for 10 minutes to allow the EVA to melt and penetrate into the microporous structure of the glass magnesium board; after cooling to 50℃, the release film is peeled off to form an interface with an adhesive strength of ≥3.5N / mm (GB / T2791 standard test).

[0116] The cells are divided into bins according to open circuit voltage (Voc) ±1% and short circuit current (Isc) ±1.5%. The deviation of the electrical parameters of the cells in the same component is ≤2%, and the cells are divided into bins.

[0117] A CCD camera (5 μm resolution) was used to identify the fiducial mark on the glass magnesium plate. The fiducial mark was the pre-printed crosshair made by laser etching the auxiliary mark after laying the EVA film in step 2.4, with an accuracy of ±0.1 mm.

[0118] Thirty-six 156mm x 156mm polycrystalline silicon cells (36 cells) with pre-soldered wires were placed in a 6 x 6 matrix on the surface of the EVA film. A Shore A50 hardness silicone indenter was placed on the cell surface. To prevent premature cross-linking of the EVA, the cells were locally heated to 80°C. Pressure was applied in stages, with an initial pressure range of 0.1 MPa to a final pressure of 0.3 MPa, maintained for 10 seconds to achieve initial adhesion of the EVA, achieving a shear strength of 0.8 N / mm. 2 .

[0119] The distance between the main grid lines of adjacent solar cells is 2mm, and they are connected by "Z-type jumper" tinned copper welding strips (span ≤ 5mm, bending radius ≥ 3 times the wire diameter), that is, the solar cells are connected in series through tinned copper wires; a parallel jumper (cross-sectional area 0.5mm) is set for every 12 solar cells. 2 ) to reduce the risk of hot spots; apply conductive silver paste (containing 85% silver, resistivity <5×10 -6 Ω·cm), cured at 150℃ for 10 minutes; ultrasonic welding (frequency 40kHz, pressure 20N) was performed on key nodes (such as the end of the string) to ensure that the contact resistance was less than 0.01Ω.

[0120] Vacuum lamination strengthening, heating stage: the temperature is gradually increased from 25°C to 145°C at a rate of 4°C / min, and the vacuum degree is ≤50Pa; constant temperature stage: maintain 145°C±2°C and a pressure of 0.8MPa for 12 minutes to promote complete cross-linking of the EVA (cross-linking degree ≥85%); cooling stage: water cooling to below 40°C to prevent thermal stress from causing hidden cracks in the battery cells.

[0121] An electroluminescent imager (resolution 100 μm) scans the cell to identify defects such as microcracks and broken grids (detection sensitivity > 0.5 mm cracks).

[0122] Test Example 1 Rapid Curing Transmittance Comparison

[0123] Avoiding the cell area, the cured component was cut into 25×25 mm test pieces. A Shimadzu UV-2600 spectrophotometer was used to automatically scan and record the transmittance curve. The results are shown in Table 2.

[0124] Table 2

[0125]

[0126] Results show that the UV curing process of this invention evenly coats the epoxy resin mixed with a photoinitiator onto the surface of the cell layer and cures it under UV light (wavelength 365nm) for 15-30 seconds. This reduces the UV protective layer curing time from 2 hours (for traditional EVA lamination) to less than 30 seconds, increasing production efficiency by 20 times.

[0127] The resin system is composed of aliphatic polyurethane acrylate which acts as a "performance bridge" in the resin system, 1,6-hexanediol diacrylate reduces the curing shrinkage, and cooperates with bisphenol A epoxy resin to form high light transmittance (visible light transmittance ≥92%).

[0128] Experimental Example 2 Comparison of Resin System Shrinkage

[0129] The density ρ of the uncured resin mixture of Preparation Examples 1 to 3 and Comparative Examples 1 to 2 was measured using a specific gravity cup □ , take the average value of three times. Inject the resin into the polytetrafluoroethylene mold (anti-stick), UV cure, and test the density after curing ρ s , the results are shown in Table 3.

[0130] Comparative Example 1: 60% EPON 828+35% HDDA+5% Irgacure 819; Comparative Example 2: 60% EPON 828+35% CN966J75+5% Irgacure 819.

[0131] Volume shrinkage = (ρs-ρl) / ρs×100%

[0132] Table 3

[0133] index Comparative Example 1 Comparative Example 2 Preparation Example 1 Preparation Example 2 Preparation Example 3 Curing time 20 seconds 20 seconds 15 seconds 20 seconds 30 seconds Shrinkage / % 2.0 3.4 1.1 1.3 1.4

[0134] By accurately measuring the shrinkage rate using the density method and optimizing the resin mixture formula of the present invention, the shrinkage rate of the UV-cured epoxy resin is controlled to less than 1.5%, meeting the stringent requirements of photovoltaic modules for dimensional stability and reliability.

[0135] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A fireproof building glass magnesium board integrated with solar photovoltaic power generation, characterized in that: include: A glass magnesium board substrate, an epoxy insulation layer, a function enhancement layer, a solar cell and a UV curing epoxy resin encapsulation layer; the UV curing epoxy resin is composed of bisphenol A epoxy resin, aliphatic polyurethane acrylate, 1,6-hexanediol diacrylate and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide.

2. The fireproof architectural glass magnesium board according to claim 1, characterized in that: The function enhancement layer comprises nano-aluminum oxide, a silane coupling agent and a BYK-345 wetting agent; The particle size of the nano-alumina is 30 nm, accounting for 5% of the total mass of the solution; In a mixed solution containing nano-alumina suspension, hydrolyzed silane coupling agent and BYK-345 wetting agent, the silane coupling agent accounts for 3% of the total mass of the solution; and the BYK-345 wetting agent accounts for 0.1% of the total mass of the solution.

3. The fireproof architectural glass magnesium board according to claim 1, characterized in that: The solar cell sheets are polycrystalline silicon cell sheets, which are arranged in a 6×6 matrix and placed on the surface of the treated glass magnesium board substrate.

4. The fireproof architectural glass magnesium board according to claim 1, characterized in that: In the UV-curable epoxy resin, bisphenol A epoxy resin accounts for 48.25% to 56.5% of the total mass of the resin mixture, aliphatic polyurethane acrylate accounts for 28.2% to 35.2% of the total mass of the resin mixture, 1,6-hexanediol diacrylate accounts for 9.4% to 12.0% of the total mass of the resin mixture, and bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide accounts for 3.0% to 5.9% of the total mass of the resin mixture.

5. The method for preparing the fireproof glass magnesium board according to any one of claims 1 to 4, characterized in that the steps include: S1. Prepare the glass magnesium board substrate: prepare the substrate bottom plate, substrate middle plate, and substrate top plate layer by layer to obtain the substrate semi-finished glass magnesium board; After the semi-finished glass magnesium board is left to stand for curing, the glass magnesium board substrate is obtained; S2. Pre-treating the surface of the glass magnesium board: After cutting the glass magnesium board prepared in S1, the glass magnesium board is polished with a double-stage sanding belt, and then plasma cleaning is performed; S3, coating insulation layer: spray insulating epoxy primer with high pressure airless spray on the surface of glass magnesium board pretreated in S2, and cure after hot air circulation baking; S4, functional layer enhancement: Prepare a mixed solution containing nano-alumina suspension, hydrolyzed silane coupling agent, and BYK-345 wetting agent, and evenly spread the mixed solution on the S3 insulating layer using spin coating. Then, spin at high speed to remove excess solution. The surface energy is increased through Si-O-Mg chemical bonding, which promotes subsequent film wetting. S5. Install the cells: Divide the cells into sections, apply UV glue to the four corners, and initially solidify them. Arrange the polycrystalline silicon or monocrystalline silicon cells with pre-soldered wires in a 4×9 matrix on the UV glue surface, and connect the cells in series with tinned copper wires. S6. Prepare a resin mixed solution containing bisphenol A epoxy resin, aliphatic polyurethane acrylate and 1,6-hexanediol diacrylate, pre-treat bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and add it to the resin mixed solution, and stir it in the dark; use a slit coater to accurately apply the above resin mixed solution along the gap between the battery cells after preliminary curing treatment in S5; use UV-LED curing and UV irradiation in stages; after hot air treatment and vacuum degassing treatment, install an aluminum alloy frame, inject silicone glue to seal, and let it stand to obtain an integrated solar cell panel based on a glass magnesium board.

6. The method for preparing the fireproof architectural glass magnesium board according to claim 5, characterized in that: S2 double-stage belt grinding starts with 400 mesh coarse grinding and then 800 mesh fine grinding, so that the surface roughness Ra ≤ 1.2μm and the flatness error is less than 0.3mm / m2; the plasma cleaning conditions are power 500W, argon flow rate 10L / min for 3 minutes.

7. The method for preparing the fireproof architectural glass magnesium board according to claim 5, characterized in that: In S2, the spray gun pressure is 20-25 MPa, the insulating epoxy primer has a thickness of 50 μm, a solid content of 60-65%, and a hot air circulation baking condition of 80° C. for 20 minutes.

8. The method for preparing the fireproof architectural glass magnesium board according to claim 5, characterized in that: The spin coating method was performed under the following conditions: low-speed rotation at 500 rpm for 10 seconds, followed by high-speed rotation at 3000 rpm for 30 seconds, and then excess solution was shaken off.

9. The method for preparing the fireproof architectural glass magnesium board according to claim 5, characterized in that: The bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide pretreatment is to dissolve (2,4,6-trimethylbenzoyl)phenylphosphine oxide in 1% of the total amount of 1,6-hexanediol diacrylate, ultrasonically disperse at 40kHz, and then add the resin system after 10 minutes; The UV-LED curing is carried out in stages using a UV-LED curing machine at 400 mW / cm 2 UV irradiation for 5 seconds to form a gel state; 1500mW / cm 2 UV irradiation for 15-30 seconds (energy density 22.5J / cm 2 ); 80℃ hot air treatment for 10 minutes to eliminate internal stress.

10. Use of the fireproof architectural glass magnesium board integrated with solar photovoltaic power generation according to any one of claims 1 to 4 in building exterior walls, rooftop photovoltaic systems, and agricultural facility photovoltaic systems.

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