Photovoltaic glass for BIPV module, and preparation method for photovoltaic glass

Abstract

Disclosed in the present invention are photovoltaic glass for a BIPV module, and a preparation method for the photovoltaic glass. The photovoltaic glass comprises a glass body, an anti-reflection layer and a color developing layer, wherein a pattern structure is provided on a surface of the glass body, and the pattern structure has first pattern surfaces and second pattern surfaces which are adjacent to each other; an included angle α is formed between each first pattern surface and the glass body, an included angle β is formed between each second pattern surface and the glass body, and the relationship α≥β is satisfied; the anti-reflection layer is arranged on the first pattern surfaces or arranged on the surface of the glass body opposite the pattern structure; and the color developing layer is arranged on the second pattern surfaces. By means of providing the pattern structure on the glass body and providing the anti-reflection layer and the color developing layer, the present invention improves the photoelectric conversion efficiency, and also maintains the aesthetic harmony between the module and a building and enhances the aesthetic appeal thereof.

Description

Photovoltaic glass for BIPV components and preparation method thereof Technical Field

[0001] The present invention relates to the technical field of photovoltaic modules, and in particular to photovoltaic glass for BIPV modules and a preparation method thereof. Background Art

[0002] As global demand for renewable energy and green buildings increases, the market demand for BIPV modules is also growing. As a design concept that integrates photovoltaic modules with building structures, BIPV modules can save additional bracket and installation costs, improve energy efficiency, and simultaneously provide electricity for buildings, meeting people's demand for renewable energy. Countries around the world are promoting the development of green buildings and renewable energy, and BIPV, as a key component, has received strong support. In its "Building Energy Conservation and Green Building Development Plan," my country has proposed actively promoting the distributed, integrated application of solar photovoltaics in urban and rural buildings and municipal utilities, and encouraging measures such as the simultaneous design and construction of solar photovoltaic systems and buildings.

[0003] Despite continued growth in market demand for BIPV modules, their development faces challenges. Traditional photovoltaic modules typically use transparent materials to maximize sunlight capture and conversion into electricity. However, to maintain the aesthetic appearance of buildings, BIPV modules often use colored patterns or other non-transparent materials. This reduces the module's light transmittance, lowering photovoltaic conversion efficiency and increasing the risk of hot spot effects. Consequently, existing BIPV modules struggle to achieve a balance between photovoltaic conversion efficiency and aesthetics.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to design a photovoltaic glass for BIPV components to address the problem that existing BIPV components are difficult to balance the power generation efficiency and aesthetics of the components. After the photovoltaic components assembled with this photovoltaic glass are combined with the building structure, both the power generation efficiency of the components and the aesthetics of the building structure can be guaranteed.

[0006] The present invention is achieved through the following technical solutions:

[0007] Provided is a photovoltaic glass for a BIPV assembly, the photovoltaic glass comprising a glass body, an anti-reflection layer, and a color-developing layer; a surface of the glass body is provided with a pattern structure, and the pattern structure has a first pattern surface and a second pattern surface adjacent to each other;

[0008] Wherein: the first patterned surface forms an angle α with the glass body, the second patterned surface forms an angle β with the glass body, and α≥β is satisfied;

[0009] The anti-reflection layer is arranged on the first patterned surface or on a side of the glass body opposite to the patterned structure; the color development layer is arranged on the second patterned surface.

[0010] Furthermore, a photovoltaic glass for a BIPV assembly: the patterned structure is arranged on the light incident surface of the glass body, and the anti-reflection layer is arranged on the first patterned surface.

[0011] Furthermore, a photovoltaic glass for a BIPV assembly: the patterned structure is arranged on the light-emitting surface of the glass body, and the anti-reflection layer is arranged on the light-incident surface of the glass body.

[0012] Furthermore, a photovoltaic glass for a BIPV component: the angle α is set to 15 to 75 degrees.

[0013] Furthermore, a photovoltaic glass for a BIPV module: the width of a single pattern in the pattern structure is set to 100 to 600 μm.

[0014] Furthermore, a photovoltaic glass for a BIPV component: the thickness of the anti-reflection layer is set to 20 to 150 nm.

[0015] Furthermore, a photovoltaic glass for a BIPV component: the anti-reflection layer includes a silicon dioxide layer and an aluminum oxide layer.

[0016] Furthermore, a photovoltaic glass for a BIPV component: the thickness of the color-developing layer is set to 10 to 100 μm; the reflection brightness value of the color-developing layer is 20 to 90.

[0017] Furthermore, a photovoltaic glass for a BIPV component: the thickness of the glass body is set to 2 to 15 mm.

[0018] A method for preparing photovoltaic glass for BIPV modules, the method comprising the following steps:

[0019] S1. Producing a pattern structure having a first pattern surface and a second pattern surface adjacent to each other on the surface of the glass body; wherein the pattern structure is produced by roller pressing, chemical etching or laser engraving;

[0020] S2, printing a fluorescent dye or a quantum dot dye on the second patterned surface, then drying at 160-180° C. for 3-6 minutes, and then tempering at 550-650° C. for 180-240 seconds to obtain the color development layer;

[0021] S3, using a vapor deposition process to first deposit a silicon dioxide layer on the first patterned surface, and then deposit an aluminum oxide layer, and perform annealing and oxidation to obtain the anti-reflection layer;

[0022] Alternatively, a vapor deposition process is used to first deposit a silicon dioxide layer on the side of the glass body opposite to the patterned structure, and then deposit an aluminum oxide layer, which is annealed and oxidized to obtain the anti-reflection layer, thereby completing the preparation of the photovoltaic glass.

[0023] Beneficial effects of the present invention:

[0024] (1) The photovoltaic glass for BIPV modules provided by the present invention has a patterned structure on the glass body, and an anti-reflection layer and a color-developing layer on the patterned structure. This not only improves the photoelectric conversion efficiency, but also maintains the aesthetic harmony between the module and the building, enhancing the aesthetics. The anti-reflection layer can reduce light reflection and increase light absorption, thereby maximizing the use of sunlight; the color-developing layer can enrich the appearance color of the module without reducing the photoelectric conversion efficiency.

[0025] (2) The present invention arranges a transmittance-enhancing layer and a color-developing layer on the first pattern surface and the second pattern surface of the pattern structure, respectively, which can form a discontinuous transmittance-enhancing layer and a color-developing layer. It can effectively reduce the consumption of the transmittance-enhancing layer and the color-developing layer materials while ensuring the aesthetics and power generation capacity of the component, which is conducive to further reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of 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 those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0027] FIG1 is a structural diagram of photovoltaic glass for BIPV modules provided in Example 1 of the present invention;

[0028] FIG2 is a structural diagram of photovoltaic glass for BIPV modules provided in Example 2 of the present invention;

[0029] Figures 3 and 4 show the structures of BIPV photovoltaic modules 1 and BIPV photovoltaic modules 2;

[0030] 5 and 6 are schematic diagrams of components viewed from a human perspective.

[0031] Markings in the figure: 1-glass body, 2-antireflection layer, 3-color rendering layer, 4-front packaging film, 5-battery layer, 6-back packaging film, 7-backboard, 11-patterned structure, 111-first patterned surface, 112-second patterned surface. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0034] Example 1

[0035] As shown in FIG1 , a photovoltaic glass for a BIPV assembly is provided, the photovoltaic glass comprising a glass body 1, an anti-reflection layer 2, and a color development layer 3;

[0036] A pattern structure 11 having the same width as that 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;

[0037] The first pattern surface 111 forms an angle α with the glass body 1, and the angle α is set to 60°; the second pattern surface 112 forms an angle β with the glass body 1, and the angle β is set to 30°; the width of a single pattern is set to 300 μm;

[0038] The anti-reflection layer 2 is arranged on the light incident surface of the glass body 1, and the color-developing layer 3 is arranged on the second patterned surface 112; the thickness of the anti-reflection layer 2 is set to 50nm, which is obtained by sequentially depositing silicon dioxide and silicon oxide; the thickness of the color-developing layer 3 is set to 50μm, and the reflection brightness value of the color-developing layer 3 is 50; the thickness of the glass body 1 is set to 8.0mm.

[0039] The method for preparing photovoltaic glass for BIPV modules provided in the above embodiment 1 includes the following specific steps:

[0040] S1. First, before the glass is formed, a pattern structure 11 having a first pattern surface 111 and a second pattern surface 112 adjacent to each other is produced on the surface of the glass body 1;

[0041] The pattern structure 11 can be made by rolling, chemical etching or laser engraving. In the first embodiment, rolling is used to form the pattern structure 11.

[0042] S2. Using a screen, print a fluorescent dye on the second patterned surface 112 by screen printing, then dry at 170°C for 6 minutes, and then temper at 600°C for 240 seconds to obtain a color development layer 3 with a thickness of 50 μm.

[0043] S3. Place the glass body 1 in a vacuum chamber and use a vapor deposition process to deposit silicon dioxide material on the light incident surface of the glass body 1 to form a nano-scale silicon dioxide film. Similarly, deposit aluminum oxide material on the silicon dioxide film to form an aluminum oxide film. The deposited film is annealed and oxidized to obtain a 50nm thick anti-reflection layer 2, thereby completing the preparation of the photovoltaic glass.

[0044] Example 2

[0045] As shown in FIG2 , a photovoltaic glass for a BIPV assembly is provided, the photovoltaic glass comprising a glass body 1, an anti-reflection layer 2, and a color development layer 3;

[0046] A pattern structure 11 having the same width as that 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;

[0047] The first pattern surface 111 forms an angle α with the glass body 1, and the angle α is set to 60°; the second pattern surface 112 forms an angle β with the glass body 1, and the angle β is set to 30°; the width of a single pattern is set to 300 μm;

[0048] The anti-reflection layer 2 is arranged on the first patterned surface 111, and the color-developing layer 3 is arranged on the second patterned 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 color-developing layer 3 is set to 50 μm, and the reflection brightness value of the color-developing layer 3 is 50; the thickness of the glass body 1 is set to 8.0 mm.

[0049] The method for preparing photovoltaic glass for BIPV modules provided in the above embodiment 2 includes the following specific steps:

[0050] S1. First, before the glass is formed, a pattern structure 11 having a first pattern surface 111 and a second pattern surface 112 adjacent to each other is produced on the surface of the glass body 1;

[0051] The pattern structure 11 can be made by rolling, chemical etching or laser engraving. In the first embodiment, rolling is used to form the pattern structure 11.

[0052] S2. Using a screen, print a fluorescent dye on the second patterned surface 112 by screen printing, then dry at 170°C for 6 minutes, and then temper at 600°C for 240 seconds to obtain a color development layer 3 with a thickness of 50 μm.

[0053] S3. Place the glass body 1 in a vacuum chamber and use a vapor deposition process to deposit silicon dioxide material on the first patterned surface 111 to form a nano-scale silicon dioxide film. Similarly, deposit aluminum oxide material on the silicon dioxide film to form an aluminum oxide film. The deposited film is annealed and oxidized to obtain a 50 nm thick anti-reflection layer 2, thereby completing the preparation of the photovoltaic glass.

[0054] The difference between Example 1 and Example 2 is that the anti-reflection layer 2 is arranged at a different position.

[0055] Example 3

[0056] The difference between Example 3 and Example 2 is that: the angles α and β in Example 3 are both set to 15°; the width of a single pattern in Example 3 is set to 100 μm; the thickness of the anti-reflection layer 2 in Example 3 is set to 20 nm; the thickness of the color development layer 3 in Example 3 is set to 10 μm, and its brightness is 20; the thickness of the glass body 1 in Example 3 is set to 2.0 mm.

[0057] Example 4

[0058] The difference between Example 4 and Example 2 is that: the angles α and β in Example 4 are both set to 75°; the width of a single pattern in Example 4 is set to 600 μm; the thickness of the anti-reflection layer 2 in Example 4 is set to 150 nm; the thickness of the color development layer 3 in Example 4 is set to 100 μm, and its brightness is 90; the thickness of the glass body 1 in Example 4 is set to 15.0 mm.

[0059] Comparative Example 1

[0060] Provided is a photovoltaic glass for a BIPV assembly, comprising a glass body 1 and a color-developing layer 3 arranged on a light-emitting surface of the glass body 1, wherein the color-developing layer 3 is formed by printing a fluorescent dye or a quantum dot dye.

[0061] application:

[0062] (1) The photovoltaic glass in the above-mentioned embodiment 1 is used as the front glass, and then laminated with the front encapsulation film 4, the battery layer 5, the back encapsulation film 6 and the back plate 7 in sequence to obtain a BIPV photovoltaic module 1, the structure of which is shown in Figure 3; wherein: the size of the front glass and the back plate 7 is 1716mm*1128mm, and the material of the back plate 7 can be selected from ultra-white tempered glass, composite material, TPT, TPE, TPC, CPC, PET; the battery layer 5 is formed by 108 battery cells connected in series, and the battery cells are 182 single crystal half-cell cells with an efficiency of 22.7%.

[0063] (2) The photovoltaic glass in the above-mentioned embodiment 2 is used as the front glass, and then laminated with the front encapsulation film 4, the battery layer 5, the back encapsulation film 6 and the back plate 7 in sequence to obtain a BIPV photovoltaic module 2, the structure of which is shown in Figure 4; wherein: the size of the front glass and the back plate 7 is 1716mm*1128mm, and the material of the back plate 7 can be selected from ultra-white tempered glass, composite material, TPT, TPE, TPC, CPC, PET; the battery layer 5 is formed by 108 battery cells connected in series, and the battery cells are 182 single crystal half-cell cells with an efficiency of 22.7%.

[0064] (3) The photovoltaic glass in the above comparative example 1 is used as the front glass, and then laminated with the front encapsulation film 4, the battery layer 5, the back encapsulation film 6 and the back plate 7 in sequence to obtain a BIPV photovoltaic module 3; wherein: the size of the front glass and the back plate 7 is 1716mm*1128mm, and the material of the back plate 7 can be selected from ultra-white tempered glass, composite material, TPT, TPE, TPC, CPC, PET; the battery layer 5 is formed by 108 battery cells connected in series, and the battery cells are 182 single crystal half-cell cells with an efficiency of 22.7%.

[0065] The BIPV photovoltaic modules 1, BIPV photovoltaic modules 2 and BIPV photovoltaic modules 3 obtained above were subjected to power tests, and the test results were 375W, 370W and 308W respectively; thus, it can be seen that the photovoltaic glass structure designed in the present invention can effectively improve the power output of the modules.

[0066] Looking at BIPV modules 1 and 2 from a human perspective, as shown in Figures 5 and 6, respectively, reveals that the color-developing layer 3 on the second patterned surface 112 is fully exposed to the viewing angle, thereby enhancing the aesthetics of the modules. In Comparative Example 1, the color-developing layer 3 is printed entirely with ink. While this ensures a good display, it significantly reduces the light transmittance of the glass, further impacting the module's photoelectric conversion efficiency.

[0067] By providing a patterned structure 11 on the peelable body 1 and optimizing the placement of the anti-reflection layer 2 and the color-developing layer 3, the present invention fully achieves high color and light transmittance, ensuring the aesthetic function of the component while increasing its power. By superimposing an anti-reflection layer on the light incident surface, the present invention increases the light transmittance of the glass, thereby maximizing sunlight utilization and improving the component's power and photoelectric conversion efficiency. By providing a color-developing layer on the patterned structure, the present invention achieves a more vibrant overall color and a stronger three-dimensional effect, further harmonizing the component with the architectural design. The present invention can adapt to a variety of architectural structures and design styles, achieving seamless integration with both modern and traditional architecture.

[0068] The present invention preferably arranges an anti-reflection layer 2 and a color-developing layer 3 on the first patterned surface 112 and the second patterned surface 112 of the patterned structure 11, respectively, which can form a discontinuous anti-reflection layer 2 and a color-developing layer 3, and can effectively reduce the consumption of anti-reflection layer and color-developing layer materials while ensuring the aesthetics and power generation capacity of the component, which is conducive to further reducing costs.

[0069] The above preferred embodiments of the present invention are only used to explain the present invention and are not used to limit the present invention. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A photovoltaic glass for BIPV components, characterized in that, The photovoltaic glass includes a glass body (1), an anti-reflection layer (2), and a color display layer (3); A pattern structure (11) is provided on the surface of the glass body (1), and the pattern structure (11) has adjacent first pattern surfaces (111) and second pattern surfaces (112); Wherein: an included angle α is formed between the first pattern surface (111) and the glass body (1), an included 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 on the surface of the glass body (1) opposite to the pattern structure (11); the color display layer (3) is provided on the second pattern surface (112).

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

3. The photovoltaic glass for a BIPV component according to claim 1, characterized in that, If the pattern structure (11) is provided on the light-emitting surface of the glass body (1), the anti-reflection layer (2) is provided on the light-incident surface of the glass body (1).

4. The photovoltaic glass for a BIPV component according to claim 1, wherein, The included angle α is set to 15 - 75°.

5. A photovoltaic glass for a BIPV module according to claim 1, wherein, The width of a single pattern in the pattern structure (11) is set to 100 - 600 μm.

6. The photovoltaic glass for a BIPV module according to claim 1, characterized in that, The thickness of the anti-reflection layer (2) is set to 20 - 150 nm.

7. A photovoltaic glass for a BIPV component according to claim 1 or 6, characterized in that, The anti-reflection layer (2) includes a silica layer and an alumina layer.

8. A photovoltaic glass for a BIPV component according to claim 1, characterized in that, The thickness of the color display layer (3) is set to 10 - 100 μm; the reflection brightness value of the color display layer (3) is 20 - 90.

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

10. [Corrected according to Rule 26 on August 19, 2024] A method for preparing photovoltaic glass for a BIPV module according to any one of claims 1 to 9, characterized in that, The method includes the following steps: S1. Produce a pattern structure (11) with adjacent first pattern surfaces (111) and second pattern surfaces (112) on the surface of the glass body (1); Among them, the production method of the pattern structure (11) is selected from a rolling method, chemical etching, or laser engraving; S2. Print a fluorescent dye or a quantum dot dye on the second pattern surface (112), then dry it at 160 - 180 °C for 3 - 6 minutes, and then temper it at 550 - 650 °C for 180 - 240 seconds to obtain the color display layer (3); S3. Adopt a vapor deposition process to first deposit a silica layer on the first pattern surface (111), and then deposit an alumina layer, and perform annealing and oxidation to obtain the anti-reflection layer (2); Or, adopt a vapor deposition process to first deposit a silica layer on the surface of the glass body (1) opposite to the pattern structure (11), and then deposit an alumina layer, and perform annealing and oxidation to obtain the anti-reflection layer (2), thus completing the preparation of the photovoltaic glass.

Images