BIPV power generation glass installed in point-type supporting mode and preparation method of BIPV power generation glass

Abstract

The invention belongs to the technical field of photovoltaic buildings, and particularly relates to BIPV power generation glass installed in a point-type supporting mode and a preparation method of the BIPV power generation glass. Comprising the following steps that first glass, second glass, a photovoltaic power generation chip and a middle adhesive film are prepared to be assembled to form an interlayer assembly, the interlayer assembly is arranged between the first glass and the second glass, and a laminated glass prefabricated assembly is formed; performing interlayer processing on the laminated glass prefabricated assembly to form a photovoltaic power generation laminated glass assembly; and after the photovoltaic power generation laminated glass assembly is subjected to drilling treatment, assembling of the BIPV power generation glass installed in a point type supporting mode is completed. According to the method, the hole is drilled in the prepared double-glass photovoltaic module, point type connection of the glass and the building structure is achieved, the problems that hole edge interlayer bubbles exist and the hole axis coaxiality is difficult to control can be solved, the production efficiency and the product quality of the photovoltaic module are improved, the installation efficiency of the solar power generation glass can be improved, and the stability of a system can be enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic architecture, and particularly relates to a point-supported BIPV power generation glass and a preparation method thereof. Background Art

[0002] With the development of photovoltaic building integration technology, integrating solar power generation products into buildings has become an important power generation method. At present, photovoltaic building integration components usually adopt a double-glass structure, that is, a composite layer is composed of two pieces of glass and solar cell chips. There are various installation methods for building glass, and among them, the point-supported glass curtain wall is a relatively common installation method.

[0003] The glass of the point-supported glass curtain wall is reliably fixed by passing stainless steel claw parts through pre-drilled holes in the glass, while the general glass curtain wall is fixed to the frame with structural glue; after the face glass is drilled at the corners, it is connected to the all-glass curtain wall of the support structure with metal connectors, while the general glass curtain wall mostly has a structure of a planar frame type and a vertical member force system. Compared with the general glass curtain wall, the force system of the point-supported glass curtain wall is not in the frame but in the support system. The glass panel on the point-supported glass curtain wall is only connected to the support structure through a few points, with almost no occlusion, achieving the maximum field of vision and applying the transparency of the glass to the best limit. It is mostly used in airports, large exhibition halls, or glass guardrails and canopies.

[0004] In the prior art, the drilling process of BIPV power generation glass basically follows the traditional drilling process of laminated glass. Usually, pre-drilling is carried out on a single piece of glass, then laminated processing is performed, and finally the intermediate adhesive film around the hole is removed. This method is prone to generating laminated bubbles at the hole edge, resulting in a decline in product quality; the intermediate film at the hole position after lamination needs to be manually cut, reducing production efficiency; due to the error of pre-drilling of a single piece of glass and the stack difference during lamination, it is often difficult to control the coaxiality of the hole axis, increasing the difficulty of glass installation.

[0005] When this method is used for the drilling of double-glass photovoltaic modules, pre-drilling also needs to be carried out on the photovoltaic power generation chips. The strength of the power generation chips is often low, and drilling is likely to cause chip cracking and quality problems such as chip pollution by drilling dust, further increasing the processing difficulty and making it difficult to achieve a high-quality and high-efficiency production mode. Summary of the Invention

[0006] The purpose of the present invention is to provide a point-supported BIPV power generation glass and a preparation method thereof, aiming at the quality problems of hole-edge bubbles, easy chip cracking, and hole position stack difference in glass components easily occurring in the prior art installation method of drilling first and then laminating.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A preparation method of BIPV power generation glass with point - type support installation, comprising the following steps: Step 1: Prepare a first glass, a second glass, a photovoltaic power generation chip, and an intermediate adhesive film. The intermediate adhesive film is respectively arranged on both sides of the photovoltaic power generation chip to form a sandwich component, and the sandwich component is arranged between the first glass and the second glass to form a laminated glass pre - fabricated component; Step 2: Perform sandwich processing on the laminated glass pre - fabricated component to form a photovoltaic sandwich glass component; the sandwich processing includes pre - pressing treatment. After pre - pressing treatment, the glass component is subjected to high - temperature and high - pressure treatment with a vacuum degree not exceeding - 0.06 MPa; the high - temperature is 130 - 140 °C, and the high - pressure is 1.1 - 1.2 MPa; Step 3: After performing drilling treatment on the photovoltaic sandwich glass component, the assembly of the BIPV power generation glass with point - type support installation is completed. Before drilling treatment, stress relief treatment needs to be performed on the drilling area.

[0008] This method realizes the point - type connection between the glass and the building structure by drilling holes in the prepared double - glass photovoltaic module, which can not only solve the problems of interlayer bubbles at the hole edge and difficult control of hole - axis coaxiality, improve the production efficiency and product quality of the photovoltaic module, but also improve the installation efficiency of the solar power generation glass, enhance the stability, safety of the system, and the field of view openness of the transparent BIPV glass curtain wall, and contribute to promoting the application of solar power generation in the building field.

[0009] Further preferably, the glass type includes at least one of soda - lime silicate glass, calcium - barium silicate glass, or calcium - aluminum silicate glass, and the thickness range of the glass is 3 - 12 mm.

[0010] As a preferred technical solution of the present invention, in step 2, the pre - pressing treatment is: using a roller press to perform pre - pressing treatment on the laminated glass pre - fabricated component. The roller - pressing parameters include: the furnace temperature range is set between 100 - 200 °C, the roller - pressing height is reduced by 1 - 2 mm relative to the thickness of the initial laminated glass pre - fabricated component, the roller - pressing speed is 1 - 3 m / min, and the glass furnace - out temperature is 40 - 70 °C.

[0011] In step 2, the high - temperature and high - pressure treatment specifically includes: loading the pre - treated glass component into a vacuum bag and evacuating it to a vacuum degree not exceeding - 0.06 MPa, and then sending the glass component into an autoclave for treatment.

[0012] As a preferred technical solution of the present invention, in step 3, the stress relief treatment: reduces the surface stress of the glass to within 20 MPa by laser annealing or hot - air annealing.

[0013] As a preferred embodiment of the present invention, the photovoltaic power generation chip includes at least one of a cadmium telluride thin film photovoltaic power generation chip, a perovskite thin film photovoltaic power generation chip, and a copper indium gallium selenide thin film photovoltaic power generation chip.

[0014] As a preferred embodiment of the present invention, the intermediate interlayer film is made of PVB or EVA material, and the thickness of the intermediate interlayer film is 0.76 mm to 3.04 mm.

[0015] As a preferred technical solution of the present invention, in step 1, one of the laying methods of the photovoltaic power generation chip in the laminated glass prefabricated component is: the size of the photovoltaic power generation chip is smaller than the size of the first glass, the photovoltaic power generation chip is arranged at the central position of the laminated glass prefabricated component, a splicing piece cushion layer is arranged in the area outside the periphery of the photovoltaic power generation chip, the thickness deviation between the splicing piece cushion layer and the photovoltaic power generation chip does not exceed 0.1 mm, and the area of the splicing piece cushion layer is the first drilling reserved area.

[0016] The intermediate layer splicing piece can be a film made of the same material as the intermediate interlayer film, such as PVB, EVA, etc., or can also be transparent or colored glass.

[0017] As a preferred technical solution of the present invention, a plurality of first holes are arranged in the first drilling reserved area, the distance between the hole edge of the first hole and the photovoltaic power generation chip is d1, and d1≥20 mm; to ensure the water vapor sealing performance and wet leakage insulation performance of the product, etc.

[0018] The distance between the hole edge of the first hole and the first side of the glass is d2, the distance between the hole edge of the first hole and the second side of the glass is d3, and at least one of d2 or d3 is at least twice the thickness of the power generation glass component; the distance between the hole edges of adjacent first holes is d4, and d4≥4r; r is the radius of the first hole, and the range of r is 6 - 30 mm.

[0019] As a preferred technical solution of the present invention, in step 1, one of the laying methods of the photovoltaic power generation chip in the laminated glass prefabricated component is: the photovoltaic power generation chip is the same size as the first glass or the second glass, before the laminated processing of the photovoltaic power generation chip, laser film removal is performed on the pre-drilling area to form a film removal area, and the film removal area is the second drilling reserved area.

[0020] In order to ensure the wet leakage insulation performance and water vapor sealing performance of the product after drilling, the photovoltaic power generation chip performs laser film removal operation on the pre-drilling area before forming the laminated chip. Its purpose is to insulate the drilling area and ensure the wet leakage insulation performance of the product; the shape of the film removal area can be a shape conducive to processing such as circular or square.

[0021] The second drilling reserved area is provided with a plurality of second holes, and the radius of the second holes is r2, where r2 is determined according to the glass installation design. For the field of architectural glass, the hole radius r ranges from 6 to 30 mm; in order to ensure the quality of drilling, it is required that the distance between the hole edge and the glass edge is not less than twice the thickness of the glass component, and the distance between hole edges is not less than four times the drilling radius.

[0022] As a preferred solution of the present invention, the first glass and the second glass need to be semi-tempered, and the surface stress of the first glass and the second glass is between 24 and 52 Mpa.

[0023] For the processing mode of the full-chip laying scheme, the difference between the radius R of the film removal area of the photovoltaic power generation chip and the hole radius r is ≥ 20 mm, and the center of the film removal area coincides with the center of the drilling hole, with a deviation of ≤ 2 mm.

[0024] Preferably, the drilling machine is a vertical or horizontal drilling machine, and a diamond-coated drill bit is selected, with a hardness ≥ 90 RHA and a cutting edge angle ≤ 90°; the drilling speed of the drilling machine is 300 - 800 rmp, and the feed rate is 0.05 - 0.2 mm / rev, which is specifically adjusted according to the hole diameter; during the drilling process, the drill bit and the glass are kept under water cooling so that the temperature of the drill bit and the glass does not exceed 50 °C.

[0025] Preferably, water jet cutting is used for drilling. The water pressure used is 300 - 400 MPa, and 80 - 100 mesh emery is selected as the abrasive; the water jet cutting drilling can replace the drilling in the chip scheme design with grooving, chamfering, etc., and can further expand the application range of photovoltaic building glass.

[0026] Preferably, it further includes step 4; after the glass component completed with drilling is cleaned, a waterproof primer is coated around the holes.

[0027] Preferably, the cleaning of the glass component is completed in a glass cleaning machine.

[0028] Preferably, the waterproof primer is at least one of acrylate type waterproof coating, polyurethane waterproof coating, and polyurea waterproof coating. Further preferably, the waterproof primer is a single-component acrylate type waterproof coating.

[0029] Preferably, in step 4, before coating the waterproof material, ensure that the hole position is dry, and ensure that the coated waterproof primer completely covers the intermediate adhesive film to isolate it from contact with the outside air.

[0030] The point-supported installed BIPV power generation glass obtained according to the above technical solution.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The technical solution of the present invention provides a method for preparing BIPV power generation glass with point - type support installation. This preparation method overcomes the technical defects in the prior art. In the prior art, when assembling glass after drilling first, sandwich bubbles are extremely likely to occur at the hole edges, resulting in a decline in product quality; and the intermediate film at the hole position after lamination needs to be manually cut, reducing production efficiency. Overall drilling can avoid quality defects such as hole position misalignment and improve the production efficiency of power generation glass.

[0032] 2. The glass obtained by the preparation method of the present invention has no hole position misalignment, no bubbles at the hole edges, and the power generation performance of all power generation glasses meets the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic plan view of the power generation glass of Embodiment 1 of the present invention; Figure 2 It is a schematic structural view of the power generation glass of Embodiment 1 of the present invention; Figure 3 It is a schematic structural view of the first hole of the power generation glass of Embodiment 1 of the present invention; Figure 4 It is a schematic plan view of the power generation glass of Embodiment 2 of the present invention; Figure 5 It is a schematic structural view of the second hole of the power generation glass of Embodiment 2 of the present invention; Figure 6 It is a schematic structural view of the power generation glass of Embodiment 2 of the present invention; Reference numerals: 1 - First glass; 2 - Second glass; 3 - Photovoltaic power generation chip; 4 - Intermediate adhesive film; 5 - First hole; 6 - Second hole; 7 - First drilling reserved area; 8 - Splicing piece cushion layer; 9 - Film removal area. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present invention will be described in detail below with reference to the drawings.

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] Embodiment 1 This embodiment provides a BIPV power generation glass with point - type support installation. As Figures 1-3 shown, the power generation glass is assembled according to the following method: Step 1: Prepare the first glass, the second glass, a photovoltaic power generation chip, and an intermediate adhesive film. The intermediate adhesive film is respectively disposed on both sides of the photovoltaic power generation chip to form a sandwich assembly, and the sandwich assembly is disposed between the first glass and the second glass to form a laminated glass prefabricated assembly. In this embodiment, the type of the first glass or the second glass is soda-lime silicate glass; the thickness range of the first glass or the second glass is 6 mm.

[0037] More specifically, before the first glass and the second glass are assembled, semi-tempering treatment is performed. In this embodiment, the surface stress of the first glass and the second glass is 45 - 52 MPa.

[0038] As Figure 1 shown, the size of the photovoltaic power generation chip is smaller than the size of the first glass. Specifically, the length of the photovoltaic power generation chip is smaller than that of the first glass or the second glass, and the width of the photovoltaic power generation chip is equal to the width of the first glass or the second glass; the photovoltaic power generation chip is disposed at the central position of the laminated glass prefabricated assembly, and the photovoltaic power generation chip uses a 3.2 mm cadmium telluride thin film photovoltaic power generation chip; A splicing piece cushion layer is disposed in the area outside the periphery of the photovoltaic power generation chip. In this embodiment, the splicing piece cushion layers are respectively located on the opposite sides in the length direction of the first glass, and the thickness deviation between the splicing piece cushion layer and the photovoltaic power generation chip does not exceed 0.1 mm. The area of the splicing piece cushion layer is the first drilling reserved area.

[0039] Step 2: Perform sandwich processing on the laminated glass prefabricated assembly to form a photovoltaic sandwich glass assembly; the sandwich processing includes pre-pressing treatment, and after the pre-pressing treatment, the glass assembly is subjected to high-temperature and high-pressure treatment with a vacuum degree not exceeding -0.06 MPa; the high temperature is 130 - 140 °C, and the high pressure is 1.1 - 1.2 MPa; more specifically, the pre-pressing treatment is: using a roller press to perform pre-pressing treatment on the laminated glass prefabricated assembly, and the roller pressing parameters include: the furnace temperature range is set between 100 - 200 °C, the roller pressing height is reduced by 1 - 2 mm relative to the thickness of the initial laminated glass prefabricated assembly, the roller pressing speed is 1 - 3 m / min, and the glass furnace outlet temperature is 40 - 70 °C.

[0040] Step 3: Perform drilling treatment in the first drilling reserved area, that is, the assembly of the point-supported BIPV power generation glass is completed. Before the drilling treatment, stress relief treatment needs to be performed on the drilling area. Specifically, the stress relief treatment is: laser annealing or hot air annealing can be selected to reduce the glass surface stress to within 20 MPa. Sample #1 is obtained.

[0041] In this embodiment, as Figure 1As shown, the number of drill holes is 4, marked as the first holes. Each of the first holes is arranged near the right-angle area of the glass, as Figure 3 shown, the width of the first drill hole reserved area is d, Figure 3 schematically shows the positional relationship between the first hole and the first glass. The distance between the hole edge of the first hole and the photovoltaic power generation chip is d1, d1≥20mm; the distance between the hole edge of the first hole and the first side of the glass is d2, the distance between the hole edge of the first hole and the second side of the glass is d3, and at least one of d2 or d3 is at least twice the thickness of the power generation glass module; the distance between the hole edges of adjacent first holes is d4, d4≥4r; r is the radius of the first hole, and the range of r is 6-30mm. In this embodiment, the radius r of the first hole is 30mm.

[0042] Embodiment 2 This embodiment provides a point-supported BIPV power generation glass, as Figures 4-6 shown, the power generation glass is assembled in the following manner: Step 1: Prepare the first glass, the second glass, the photovoltaic power generation chip, and the intermediate adhesive film. The intermediate adhesive film is respectively arranged on both sides of the photovoltaic power generation chip to form a sandwich component. The sandwich component is arranged between the first glass and the second glass to form a laminated glass prefabricated component; in this embodiment, the type of the first glass or the second glass is calcium barium silicate glass; the thickness range of the first glass or the second glass is 5mm.

[0043] As Figure 4 shown, the photovoltaic power generation chip has the same size as the first glass or the second glass. The photovoltaic power generation chip performs laser film removal on the pre-drilled area before forming the sandwich chip to form a film-removed area, and the film-removed area is the second drill hole reserved area. The photovoltaic power generation chip is a perovskite thin film photovoltaic power generation chip. The purpose of the laser film removal is to insulate the drilling area and ensure the wet leakage insulation performance of the product; the shape of the film-removed area can be circular, square, etc., which are beneficial to processing. In the present invention, a circular film-removed area is taken as an example, as Figure 4 shown.

[0044] The radius R of the film-removed area is determined according to the radius r of the drill hole actually required. As Figure 5 shown, the hole is located at the center of the film-removed area, and R-r≥20mm. The purpose is to ensure that there is a sufficient insulation distance between the edge of the effective working area of the photovoltaic power generation chip and the hole edge, so as to ensure the wet leakage insulation performance.

[0045] A plurality of second holes are provided in the second drill hole reserved area, and the radius of the second hole is r2. In this embodiment, the radius R of the film-removed area is 35mm, and r2 is 15mm.

[0046] Step 2: Perform interlayer processing on the laminated glass prefabricated component to form a photovoltaic interlayer glass component; the interlayer processing includes pre-pressing treatment, and after the pre-pressing treatment, the glass component is subjected to high-temperature and high-pressure treatment under a vacuum degree not exceeding -0.06 MPa; the high temperature is 130 - 140 °C, and the high pressure is 1.1 - 1.2 MPa; more specifically, the pre-pressing treatment is: using a roller press to perform pre-pressing treatment on the laminated glass prefabricated component, and the roller pressing parameters include: the furnace temperature range is set between 100 - 200 °C, the roller pressing height is reduced by 1 - 2 mm relative to the thickness of the initial laminated glass prefabricated component, the roller pressing speed is 1 - 3 m / min, and the glass furnace outlet temperature is 40 - 70 °C.

[0047] Step 3: Perform drilling treatment in the first drilling reserved area, that is, complete the assembly of the point-supported BIPV power generation glass. Before the drilling treatment, stress relief treatment needs to be performed on the drilling area. Specifically, the stress relief treatment is: laser annealing or hot air annealing can be selected to reduce the surface stress of the glass to within 20 MPa. Sample #2 is obtained.

[0048] In this embodiment, as Figure 4 shown, the number of drill holes is 4, marked as the second holes, and each of the second holes is arranged near the right-angle area of the glass. As Figure 5 shown, in this embodiment, the radius r2 of the second hole is 15 mm.

[0049] Example 3 In this embodiment, a BIPV power generation glass is prepared, and the preparation method refers to Example 1, named sample #3.

[0050] Example 4 In this embodiment, a BIPV power generation glass is prepared, and the preparation method refers to Example 2, named sample #4.

[0051] Example 5 In this embodiment, a BIPV power generation glass is prepared, and the preparation method refers to Example 1, named sample #5.

[0052] Table 1 shows the parameter information of the power generation glass of Examples 1 - 5

[0053] Comparative Example 1 In this embodiment, a BIPV power generation glass is provided, named sample #6; sample #6 uses 6 mm ultra-white glass as the first glass and the second glass, without being tempered / half-tempered, and the surface stress of the glass is 10 MPa. After completing the component processing, without performing stress relief treatment, directly perform drilling processing.

[0054] Comparative Example 2 This embodiment provides a BIPV power generation glass named Sample #7. Sample #7 uses 6mm ultra-clear glass as the first and second glasses, which are tempered / heat-strengthened, and the surface stress of the glass is 45 - 52 MPa. After completing the component processing, no stress relief treatment is carried out, and drilling processing is directly carried out.

[0055] Comparative Example 3 This embodiment provides a BIPV power generation glass named Sample #8. The structure of this power generation glass is the same as that of the power generation glass in Embodiment 1. The power generation chips are arranged in a tiled manner. The preparation method of this power generation glass adopts the existing technology: Specifically, before assembling the first and second glasses, after drilling them, heat-strengthening processing is carried out, and the surface stress of the glass is 45 - 52 MPa. The splicing sheet cushion layer uses 3.2mm ultra-clear glass. Before assembling, according to the chip size and the size of the splicing sheet cushion layer, the drilling positions are calculated, and mechanical drilling processing is adopted. During the assembling process, the holes of the first glass, the second glass, and the splicing sheet cushion layer are aligned and laminated in sequence. After completing the component processing, the glue film at the holes is cleaned.

[0056] Comparative Example 4 This embodiment provides a BIPV power generation glass named Sample #9. The structure of this power generation glass is the same as that of the power generation glass in Embodiment 2. The power generation chips are arranged in a full-coverage manner. The preparation method of this power generation glass adopts the existing technology: Specifically, before assembling the first and second glasses, after drilling them, heat-strengthening processing is carried out, and the surface stress of the glass is 45 - 52 MPa. Before assembling the power generation chips, after laser film removal at the positions that need to be drilled, mechanical drilling processing is adopted, and the glass powder and other impurities on the surface of the power generation chips are cleaned by a glass washing machine. During the assembling process, the holes of the first glass, the second glass, and the power generation chips are aligned and laminated in sequence. After completing the component processing, the glue film at the holes is cleaned.

[0057] Perform tests on Performance 1, Performance 2, and Performance 3 for the power generation glass samples #1 - #9 obtained from Embodiments 1 - 5 and Comparative Examples 1 - 4. The specific test methods are as follows: The test results are shown in Table 2.

[0058] Table 2 is the performance summary table of the power generation glass samples

[0059] Table 3 is the yield data of the power generation glass

[0060] After drilling multiple parallel samples #2, the edges of the holes are coated with a one-component acrylate waterproof coating, a polyurethane waterproof coating, and a polyurea waterproof coating respectively. For distinction, they are further named Sample #21, Sample #22, and Sample #23. Sample #24 is not subjected to waterproof coating treatment.

[0061] The damp heat test, wet leakage current test, and insulation resistance test were carried out on Samples #21 - #24, and the results are shown in Table 4 as follows: Table 4 is a summary of the test data

[0062] Through the above tests and comparisons, it is found that in the method of the present invention, the overall drilling greatly shortens the processing time of the power generation glass, improves the efficiency. Drilling the entire power generation glass can avoid defects such as hole position overlap difference and hole position cracking, improve the appearance of the hole position of the overall power generation glass, effectively protect the integrity of the photovoltaic power generation chip, reduce the cracking rate of the chip, and avoid chip contamination.

[0063] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation method of BIPV power generation glass with point support installation, characterized in that, It includes the following steps: Step 1: Prepare the first glass, the second glass, a photovoltaic power generation chip, and an intermediate adhesive film. The intermediate adhesive film is respectively arranged on both sides of the photovoltaic power generation chip to form a sandwich component, and the sandwich component is arranged between the first glass and the second glass to form a laminated glass prefabricated component; Step 2: Perform sandwich processing on the laminated glass prefabricated component to form a photovoltaic sandwich glass component; the sandwich processing includes pre-pressing treatment, and after the pre-pressing treatment, the glass component is subjected to high-temperature and high-pressure treatment at a vacuum degree not exceeding -0.06 MPa; the high temperature is 130 - 140 °C, and the high pressure is 1.1 - 1.2 MPa; Step 3: After performing drilling treatment on the photovoltaic sandwich glass component, the assembly of the point-supported BIPV power generation glass is completed. Before the drilling treatment, stress relief treatment needs to be performed on the drilling area.

2. The method for preparing BIPV power generation glass with point support installation according to claim 1, characterized in that In Step 2, the pre-pressing treatment is as follows: Use a roller press to perform pre-pressing treatment on the laminated glass prefabricated component. The roller pressing parameters include: the furnace temperature range is set between 100 - 200 °C, the roller pressing height is reduced by 1 - 2 mm relative to the thickness of the initial laminated glass prefabricated component, the roller pressing speed is 1 - 3 m / min, and the glass furnace outlet temperature is 40 - 70 °C.

3. The method for preparing the BIPV power generation glass with point support installation according to claim 1, characterized in that, In Step 3, the stress relief treatment: Reduce the surface stress of the glass to within 20 MPa through laser annealing or hot air annealing.

4. The preparation method of the point-supported BIPV power generation glass according to claim 1, wherein, In Step 1, one of the laying methods of the photovoltaic power generation chip in the laminated glass prefabricated component is: the size of the photovoltaic power generation chip is smaller than the size of the first glass, the photovoltaic power generation chip is arranged at the central position of the laminated glass prefabricated component, a splicing piece cushion layer is arranged in the area outside the periphery of the photovoltaic power generation chip, the thickness deviation between the splicing piece cushion layer and the photovoltaic power generation chip does not exceed 0.1 mm, and the area of the splicing piece cushion layer is the first drilling reserved area.

5. The method for preparing BIPV power generation glass with point support installation according to claim 4, characterized in that, A plurality of first holes are arranged in the first drilling reserved area. The distance between the hole edge of the first hole and the photovoltaic power generation chip is d1, d1≥20 mm; the distance between the hole edge of the first hole and the first side of the glass is d2, the distance between the hole edge of the first hole and the second side of the glass is d3, and at least one of d2 or d3 is at least twice the thickness of the power generation glass component; the distance between the hole edges of adjacent first holes is d4, d4≥4r; r is the radius of the first hole, and the range of r is 6 - 30 mm.

6. The preparation method of the BIPV power generation glass with point support installation according to claim 1, characterized in that, In Step 1, one of the laying methods of the photovoltaic power generation chip in the laminated glass prefabricated component is: the photovoltaic power generation chip is the same size as the first glass or the second glass. Before forming the sandwich chip, laser film removal is performed on the pre-drilling area to form a film removal area, and the film removal area is the second drilling reserved area.

7. The method for preparing the BIPV power generation glass with point support installation according to claim 6, characterized in that, A plurality of second holes are arranged in the second drilling reserved area. The radius of the second hole is r2, the difference between the radius R of the film removal area and the radius r2 of the second hole is ≥20 mm, and the center of the film removal area coincides with the center of the second hole, with a deviation ≤2 mm.

8. The method for preparing the BIPV power generation glass with point support installation according to claim 1, wherein, In Step 1, before the first glass and the second glass are assembled, semi-tempering treatment is performed, and the surface stress of the first glass and the second glass is between 24 and 52 Mpa.

9. The method for preparing BIPV power generation glass with point support installation according to claim 1, wherein, The photovoltaic power generation chip includes at least one of a cadmium telluride thin film photovoltaic power generation chip, a perovskite thin film photovoltaic power generation chip, and a copper indium gallium selenide thin film photovoltaic power generation chip.

10. The point-supported and installed BIPV power generation glass obtained by the preparation method according to any one of claims 1-9.

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