Photovoltaic glass for BIPV assemblies and its manufacturing method

Abstract

The present invention discloses a photovoltaic glass for a BIPV assembly and a method for manufacturing the same. The photovoltaic glass includes a glass body, an anti-reflection layer, and a coloring layer. The glass body has a patterned structure on its surface, and the patterned structure has adjacent first and second patterned surfaces. An angle α is formed between the first patterned surface and the glass body, and an angle β is formed between the second patterned surface and the glass body, where α≧β. The anti-reflection layer is provided on the first patterned surface or on the surface of the glass body facing the patterned structure, and the coloring layer is provided on the second patterned surface. By providing a patterned structure on the glass body and providing an anti-reflection layer and a coloring layer, the present invention not only improves photovoltaic conversion efficiency but also maintains aesthetic harmony between the assembly and the building, improving its aesthetic appearance.

Description

[Technical Field]

[0001] The present invention relates to the technical field of photovoltaic assemblies, and in particular to photovoltaic glass for BIPV assemblies and methods for manufacturing the same. [Background technology]

[0002] As global demand for renewable energy and environmentally friendly buildings grows, so too does market demand for BIPV assemblies. BIPV assemblies, a design concept that combines photovoltaic assemblies with building structures, can reduce additional mounting and installation costs, improve energy efficiency, and provide power to buildings to meet renewable energy demand. Countries around the world are promoting the development of environmentally friendly buildings and renewable energy, and BIPV is strongly supported as an important component. In its "Building Energy Conservation and Environmentally Friendly Building Development Plan," China has proposed measures such as actively promoting the distributed and integrated application of photovoltaic power generation in urban and rural buildings and urban public facilities, and promoting the synchronized design and construction of photovoltaic power generation systems and buildings.

[0003] While market demand for BIPV assemblies continues to grow, their development faces several challenges. Conventional photovoltaic assemblies typically use transparent materials to maximize sunlight capture and conversion into electrical energy. However, to maintain the aesthetic appearance of a building, BIPV assemblies tend to use colored patterns or other opaque materials, which reduces the assembly's light transmission, reduces photovoltaic conversion efficiency, and increases the risk of hot spots. In other words, it is difficult for conventional BIPV assemblies to achieve both high photovoltaic conversion efficiency and aesthetic appeal. Summary of the Invention

[0004] The object of the present invention is to address the problem of conventional BIPV assemblies, which have difficulty in achieving both power generation efficiency and aesthetic appeal, by designing photovoltaic glass for BIPV assemblies, and combining a photovoltaic assembly made of this photovoltaic glass with an architectural structure, thereby ensuring the power generation efficiency of the assembly and the aesthetic appeal of the architectural structure.

[0005] The present invention is realized by the following embodiments.

[0006] The provided photovoltaic glass for a BIPV assembly includes a glass body, an anti-reflection layer, and a color-developing layer, and a pattern structure is provided on the surface of the glass body, and the pattern structure has adjacent first and second pattern surfaces. Here, an angle α is formed between the first pattern surface and the glass body, an angle β is formed between the second pattern surface and the glass body, and α≧β is satisfied; The antireflection layer is provided on the first pattern surface or on a surface of the glass body facing the pattern structure, and the color-producing layer is provided on the second pattern surface.

[0007] Furthermore, in the photovoltaic glass for a BIPV assembly of the present invention, the pattern structure may be provided on the light incident surface of the glass body, and the anti-reflection layer may be provided on the first pattern surface.

[0008] Furthermore, in the photovoltaic glass for a BIPV assembly of the present invention, the pattern structure may be provided on the light-emitting surface of the glass body, and the anti-reflection layer may be provided on the light-incident surface of the glass body.

[0009] Furthermore, in the photovoltaic glass for a BIPV assembly of the present invention, the angle α may be set to 15 to 75°.

[0010] Furthermore, in the photovoltaic glass for a BIPV assembly of the present invention, the width of each pattern in the pattern structure may be set to 100 to 600 μm.

[0011] Furthermore, in the photovoltaic glass for a BIPV assembly of the present invention, the thickness of the antireflection layer may be set to 20 to 150 nm.

[0012] Furthermore, in the photovoltaic glass for a BIPV assembly of the present invention, the antireflection layer may include a silicon dioxide layer and an aluminum oxide layer.

[0013] Furthermore, in the photovoltaic glass for a BIPV assembly of the present invention, the color-forming layer may have a thickness of 10 to 100 μm and a reflection luminance value of 20 to 90 lux.

[0014] Furthermore, in the photovoltaic glass for a BIPV assembly of the present invention, the thickness of the glass body may be set to 2 to 15 mm.

[0015] A method for manufacturing photovoltaic glass for a BIPV assembly, comprising the steps of: S1 is a step of manufacturing a pattern structure having adjacent first and second pattern surfaces on the surface of the glass body, where the pattern structure is manufactured using a roller pressing method, a chemical etching method, or a laser engraving method. In S2, a fluorescent dye or a quantum dot dye is printed on the second pattern surface, then dried at 160 to 180° C. for 3 to 6 minutes, and cured at 550 to 650° C. for 180 to 240 seconds to obtain the color-developing layer. S3 uses a vapor deposition process to first deposit one silicon dioxide layer, then deposit an aluminum oxide layer on the first patterned surface, and then perform an annealing treatment to obtain the oxidized anti-reflection layer. Alternatively, a vapor deposition process may be used to first deposit a silicon dioxide layer on the surface of the glass body facing the pattern structure, followed by depositing an aluminum oxide layer, followed by annealing to obtain the oxidized anti-reflection layer, thereby completing the manufacture of the solar photovoltaic glass.

[0016] Beneficial effects of the present invention: (1) The photovoltaic glass for BIPV assemblies provided by the present invention has a patterned structure on the glass body, and this patterned structure is coated with an anti-reflection layer and a coloring layer, which not only improves photovoltaic conversion efficiency but also maintains aesthetic harmony between the assembly and the building, improving its appearance. The anti-reflection layer reduces light reflection and increases light absorption, allowing for maximum utilization of sunlight, while the coloring layer enriches the exterior color of the assembly without reducing photovoltaic conversion efficiency.

[0017] (2) The present invention provides an anti-reflection layer and a color-forming layer on the first pattern surface and the second pattern surface of the pattern structure, respectively, and can form discontinuous anti-reflection layers and color-forming layers. This effectively reduces the consumption of materials for the anti-reflection layer and color-forming layer while maintaining the aesthetic appearance and power generation capacity of the assembly, thereby contributing to further cost reduction. [Brief explanation of the drawings]

[0018] In order to more clearly explain the embodiments of the present invention, the following will briefly introduce the drawings used in the description of the embodiments. Of course, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can further derive other drawings based on these drawings without requiring creative efforts. [Figure 1] FIG. 1 is a structural diagram of a photovoltaic glass for a BIPV assembly provided according to embodiment 1 of the present invention. [Figure 2] FIG. 2 is a structural diagram of a photovoltaic glass for a BIPV assembly provided according to embodiment 2 of the present invention. [Figure 3] FIG. 3 shows the structure of the BIPV photovoltaic assembly 1 and the BIPV photovoltaic assembly 2. [Figure 4] FIG. 4 shows the structure of the BIPV photovoltaic assembly 1 and the BIPV photovoltaic assembly 2. [Figure 5] Figure 5 is a schematic diagram of the assembly from a human perspective. [Figure 6]Figure 6 is a schematic diagram of the assembly from a human perspective. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present invention will be clearly and completely described in conjunction with the drawings. However, it is clear that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is not intended to impose any limitations on the application or use of the present invention. Any other embodiments that can be obtained by those skilled in the art based on the embodiments of the present invention without performing any novel work are also within the scope of the claims of the present invention.

[0020] In describing the present invention, the terms "upper," "lower," "left," "right," "top," "bottom," and other designations of direction or positional relationship are used solely for the purpose of simplifying the description of the present invention and do not indicate or imply that the devices or elements referred to have a particular orientation, are configured, or operate in a particular manner. Therefore, they are not intended to limit the present invention. Furthermore, the terms "first" and "second" are merely descriptive and do not indicate or imply the relative importance or quantity of the designated technical features. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include one or more of the designated features. Furthermore, the terms "first," "second," and the like are used to distinguish between similar objects and do not necessarily describe a particular order or priority. Thus, it should be understood that data used in embodiments of the present invention may be interchanged where appropriate to allow implementation in an order other than that illustrated or described herein.

[0021] Embodiment 1 As shown in FIG. 1 , the photovoltaic glass for a BIPV assembly of the present invention includes a glass body 1, an anti-reflection layer 2, and a color-forming layer 3; A pattern structure 11 having the same width as the width of the glass body 1 is provided on the light-emitting surface of the glass body 1, and the pattern structure 11 has a first pattern surface 111 and a second pattern surface 112 adjacent to each other. Here, an angle α is formed between the first pattern surface 111 and the glass body 1, and the angle α is set to 60°, an angle β is formed between the second pattern surface 112 and the glass body 1, and the angle β is set to 30°, and the width of each pattern is set to 300 μm. The anti-reflection layer 2 is provided on the light incident surface of the glass body 1, the coloring layer 3 is provided on the second pattern surface 112, the thickness of the anti-reflection layer 2 is set to 50 nm, which is obtained by sequentially depositing silicon dioxide and silicon oxide, the thickness of the coloring layer 3 is set to 50 μm, the reflection brightness value of the coloring layer 3 is 50, and the thickness of the glass body 1 is set to 8.0 mm.

[0022] The manufacturing method of photovoltaic glass for BIPV assemblies provided by the above embodiment 1 includes the following specific steps: S1 is a step of first manufacturing a pattern structure 11 having a first pattern surface 111 and a second pattern surface 112 adjacent to each other on a surface of the glass body 1 before glass molding, Here, the pattern structure 11 may be manufactured using a roller press method, a chemical etching method, or a laser engraving method, and in the first embodiment, it is formed by rolling using a roller press method. S2 is a step in which a fluorescent dye is printed on the second pattern surface 112 using a screen printing method, then dried at 170°C for 6 minutes, and after drying, cured at 600°C for 240 seconds to obtain a color-forming layer 3 with a thickness of 50 μm. In step S3, the glass body 1 is placed in a vacuum chamber, and a silicon dioxide material is deposited on the light incident surface of the glass body 1 using a vapor deposition process to form a nanoscale silicon dioxide thin film. Similarly, an aluminum oxide material is deposited on the silicon dioxide thin film to form an aluminum oxide thin film. The deposited thin film is then annealed and oxidized to obtain an anti-reflection layer 2 with a thickness of 50 nm, thereby completing the manufacture of the photovoltaic glass. The manufacturing method includes steps S1 to S3.

[0023] Embodiment 2 As shown in FIG. 2 , the photovoltaic glass for a BIPV assembly of the present invention includes a glass body 1, an anti-reflection layer 2, and a color-forming layer 3; A pattern structure 11 having the same width as the width of the glass body 1 is provided on the light incident surface of the glass body 1, and the pattern structure 11 has a first pattern surface 111 and a second pattern surface 112 adjacent to each other. Here, an angle α is formed between the first pattern surface 111 and the glass body 1, and the angle α is set to 60°, an angle β is formed between the second pattern surface 112 and the glass body 1, and the angle β is set to 30°, and the width of each pattern is set to 300 μm. The anti-reflection layer 2 is provided on the first pattern surface 111, the coloring layer 3 is provided on the second pattern surface 112, the thickness of the anti-reflection layer 2 is set to 50 nm, it is made by sequential deposition of silicon dioxide and silicon oxide, the thickness of the coloring layer 3 is set to 50 μm, the reflection brightness value of the coloring layer 3 is 50, and the thickness of the glass body 1 is set to 8.0 mm.

[0024] The manufacturing method of photovoltaic glass for BIPV assemblies provided in the above embodiment 2 includes the following specific steps: S1 is a step of first producing a pattern structure 11 having a first pattern surface 111 and a second pattern surface 112 adjacent to each other on the surface of the glass body 1 before glass molding. Here, the pattern structure 11 may be manufactured using a roller press method, a chemical etching method, or a laser engraving method, and in the first embodiment, it is formed by rolling using a roller press method. S2 is a step in which a fluorescent dye is printed on the second pattern surface 112 using a screen printing method, then dried at 170°C for 6 minutes, and after drying, cured at 600°C for 240 seconds to obtain a color-forming layer 3 with a thickness of 50 μm. S3 places the glass body 1 in a vacuum chamber and deposits a silicon dioxide material on the first patterned surface 111 using a vapor deposition process to form a nanoscale silicon dioxide thin film; Similarly, an aluminum oxide material is deposited on the silicon dioxide thin film to form an aluminum oxide thin film, and the deposited thin film is then annealed and oxidized to obtain an anti-reflection layer 2 with a thickness of 50 nm, completing the production of the solar photovoltaic glass.

[0025] The difference between the first and second embodiments is that the position where the antireflection layer 2 is provided is different.

[0026] Embodiment 3 The differences between embodiment 3 and embodiment 2 are that in embodiment 3, the angles α and β are both set to 15°; the width of each pattern in embodiment 3 is set to 100 μm; the thickness of the anti-reflection layer 2 in embodiment 3 is set to 20 nm; the thickness of the color-producing layer 3 in embodiment 3 is set to 10 μm and its brightness is 20; and the thickness of the glass body 1 in embodiment 3 is set to 2.0 mm.

[0027] Embodiment 4 The differences between embodiment 4 and embodiment 2 are that in embodiment 4, the angles α and β are both set to 75°; the width of each pattern in embodiment 4 is set to 600 μm; the thickness of the anti-reflection layer 2 in embodiment 4 is set to 150 nm; the thickness of the color-producing layer 3 in embodiment 4 is set to 100 μm and its brightness is 90; and the thickness of the glass body 1 in embodiment 4 is set to 15.0 mm.

[0028] Comparative Form 1 The present invention provides a photovoltaic glass for a BIPV assembly, which includes a glass body 1 and a coloring layer 3 provided on the light-emitting surface of the glass body 1, the coloring layer 3 being formed by printing with a fluorescent dye or quantum dot dye.

[0029] application: (1) The photovoltaic glass in the above-described embodiment 1 is used as the front glass, and a front sealing film 4, a battery layer 5, a rear sealing film 6, and a back panel 7 are laminated in this order to obtain a BIPV photovoltaic assembly 1 having the structure shown in Fig. 3. Here, the dimensions of the front glass and the back panel 7 are 1716mm x 1128mm, and the material of the back panel 7 can be one of ultra-white tempered glass, composite material, TPT, TPE, TPC, CPC, and PET. The battery layer 5 is formed by connecting 108 battery cells in series, and the battery cells are 182 monocrystalline half-cut batteries with an efficiency of 22.7%.

[0030] (2) The photovoltaic glass in the above-mentioned embodiment 2 is used as the front glass, and a front sealing film 4, a battery layer 5, a rear sealing film 6, and a back plate 7 are laminated in this order to obtain a BIPV photovoltaic assembly 2 having the structure shown in Figure 4. Here, the dimensions of the front glass and the back plate 7 are 1716mm x 1128mm, and the material of the back plate 7 can be one of ultra-white tempered glass, composite material, TPT, TPE, TPC, CPC, and PET. The battery layer 5 is formed by connecting 108 battery cells in series, and the battery cells are 182 monocrystalline half-cut batteries with an efficiency of 22.7%.

[0031] (3) The photovoltaic glass in Comparative Example 1 is used as the front glass, and a front sealing film 4, a battery layer 5, a rear sealing film 6, and a back plate 7 are laminated in this order to obtain a BIPV photovoltaic assembly 3. Here, the dimensions of the front glass and the back plate 7 are 1716 mm × 1128 mm, and the material of the back plate 7 can be one of ultra-white tempered glass, composite material, TPT, TPE, TPC, CPC, and PET. The battery layer 5 is formed by connecting 108 battery cells in series, and the battery cells are 182 monocrystalline half-cut batteries with an efficiency of 22.7%.

[0032] The power output tests of the BIPV solar power assembly 1, BIPV solar power assembly 2, and BIPV solar power assembly 3 obtained above were 375 W, 370 W, and 308 W, respectively, which shows that the solar power generation glass structure designed according to the present invention can effectively improve the power output of the assembly.

[0033] When BIPV photovoltaic assembly 1 and BIPV photovoltaic assembly 2 are viewed from a human perspective, as shown in Figures 5 and 6, respectively, the coloring layer 3 on second pattern surface 112 is fully exposed to the field of view, improving the aesthetic appearance of the assemblies. The coloring layer 3 in comparative example 1 is printed using full-surface ink, which ensures a display effect, but significantly reduces the light transmittance of the glass, further affecting the photoelectric conversion efficiency of the assemblies.

[0034] The present invention provides a pattern structure 11 on the glass body 1 and optimizes the positions of the anti-reflection layer 2 and color-forming layer 3 to fully achieve vivid colors and high light transmission, improving the output while maintaining the aesthetic appearance of the assembly. The present invention laminates an anti-reflection layer on the light incident surface to increase the light transmittance of the glass, thereby maximizing the use of sunlight and improving the output and photoelectric conversion efficiency of the assembly. Furthermore, the present invention provides a color-forming layer on the pattern structure to brighten the color of the entire assembly, enhance the three-dimensional effect, and better harmonize the assembly with the architectural design. The present invention can be adapted to a variety of architectural structures and design styles, achieving a perfect blend in both modern and traditional architecture.

[0035] In the present invention, it is preferable to provide an anti-reflection layer 2 and a color-forming layer 3 on the first pattern surface 111 and the second pattern surface 112 of the pattern structure 11, respectively. This allows the anti-reflection layer 2 and the color-forming layer 3 to be discontinuous, ensuring the aesthetic appearance and power generation of the assembly while effectively reducing the consumption of materials for the anti-reflection layer and the color-forming layer, contributing to further cost reduction.

[0036] The above are preferred embodiments of the present invention, which are only for illustrating the present invention, not for limiting it. Any obvious changes or modifications introduced by the embodiments of the present invention still fall within the scope of the claims of the present invention. [Explanation of symbols]

[0037] 1 Glass body 2 Anti-reflection layer 3 Coloring layer 4 Front sealing film 5 battery layer 6 Rear sealing film 7 Back plate 11 Pattern Structure 111 First pattern surface 112 Second pattern surface

Claims

1. A photovoltaic glass for a BIPV assembly, the photovoltaic glass comprising a glass body (1), an anti-reflection layer (2) and a color-developing layer (3), A pattern structure (11) is provided on the surface of the glass body (1), and the pattern structure (11) has a first pattern surface (111) and a second pattern surface (112) adjacent to each other; Here, an angle α is formed between the first pattern surface (111) and the glass body (1), an angle β is formed between the second pattern surface (112) and the glass body (1), and α≧β is satisfied; The anti-reflection layer (2) is provided on the first pattern surface (111) or a surface of the glass body (1) facing the pattern structure (11), and the color-developing layer (3) is provided on the second pattern surface (112). A photovoltaic glass for a BIPV assembly, characterized in that:

2. The pattern structure (11) is provided on the light incident surface of the glass body (1), and the anti-reflection layer (2) is provided on the first pattern surface (111). The photovoltaic glass for a BIPV assembly according to claim 1 .

3. The pattern structure (11) is provided on the light exit surface of the glass body (1), and the anti-reflection layer (2) is provided on the light incident surface of the glass body (1). The photovoltaic glass for a BIPV assembly according to claim 1 .

4. The angle α is set to 15 to 75 degrees. The photovoltaic glass for a BIPV assembly according to claim 1 .

5. The width of each pattern in the pattern structure (11) is set to 100 to 600 μm. The photovoltaic glass for a BIPV assembly according to claim 1 .

6. The thickness of the antireflection layer (2) is set to 20 to 150 nm. The photovoltaic glass for a BIPV assembly according to claim 1 .

7. The anti-reflection layer (2) comprises a silicon dioxide layer and an aluminum oxide layer; 10. The photovoltaic glass for a BIPV assembly according to claim 1 or 6.

8. The thickness of the color-forming layer (3) is set to 10 to 100 μm, and the reflection brightness value of the color-forming layer (3) is 20 to 90 lux. The photovoltaic glass for a BIPV assembly according to claim 1 .

9. The thickness of the glass body (1) is set to 2 to 15 mm. The photovoltaic glass for a BIPV assembly according to claim 1 .

10. A method for manufacturing a photovoltaic glass for a BIPV assembly according to any one of claims 1 to 9, comprising the steps of: S1 is a step of manufacturing a pattern structure (11) having adjacent first and second pattern surfaces (111 and 112) on the surface of the glass body (1), Here, the pattern structure (11) is produced using a roller pressing method, a chemical etching method, or a laser engraving method. S2 is a step in which a fluorescent dye or a quantum dot dye is printed on the second pattern surface (112), then dried at 160 to 180°C for 3 to 6 minutes, and cured at 550 to 650°C for 180 to 240 seconds to obtain the color-forming layer (3). S3 uses a vapor deposition process to first deposit one silicon dioxide layer, then deposit an aluminum oxide layer on the first patterned surface (111), and then perform an annealing treatment to obtain the oxidized anti-reflection layer (2). Alternatively, a vapor deposition process may be used to first deposit a silicon dioxide layer on the surface of the glass body (1) facing the pattern structure (11), followed by depositing an aluminum oxide layer, and then performing an annealing treatment to obtain the oxidized anti-reflection layer (2), thereby completing the manufacture of the photovoltaic glass. A manufacturing method characterized by:

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