A color photovoltaic building integrated component

Abstract

This utility model discloses a colored building-integrated photovoltaic (BIPV) module, including a front glass panel, a battery layer, and a rear glass panel. The front glass panel and the battery layer are encapsulated by a first encapsulation layer, and the battery layer and the rear glass panel are connected by a second encapsulation layer. A one-dimensional photonic crystal film is disposed on the surface of the front glass panel. The one-dimensional photonic crystal film is formed by alternating deposition of SiO₂ / TiO₂ to form photonic crystal particles, which are then mixed with a silicate mixture and fused onto the surface of the front glass panel. An electrochromic layer is disposed on the back of the rear glass panel. This utility model, by fusing a one-dimensional photonic crystal film on the surface of the front glass panel and disposing of an electrochromic layer on the back of the rear glass panel, can change the color of the building facade by adjusting the light transmittance through voltage, thereby forming a high-transmittance color film layer on the photovoltaic glass. The color produced by the one-dimensional photonic crystal film has high color saturation, which can ensure the uniformity and durability of the color, ensuring a homogeneous color appearance and meeting the special design requirements of buildings for color.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module technology, specifically to a colored building-integrated photovoltaic module. Background Technology

[0002] Building Integrated Photovoltaics (BIPV) technology combines photovoltaic (PV) power generation with buildings, transforming buildings from mere energy users into energy producers. PV building materials (BIPV products) are applied to building facades, roofs, shading, and balcony glass, forming a series of products including PV curtain walls, PV tiles, and PV balconies. Among these, PV curtain walls have the largest demand, suitable for energy retrofitting projects in older buildings within complex urban residential areas. However, traditional glass curtain walls suffer from monotonous colors, high color encapsulation losses, conservative designs, high energy consumption, and high costs. There is an urgent need for new, high-transmittance, multi-colored PV curtain wall products that meet the demands of buildings for diverse and colorful appearances. Furthermore, colored BIPV products suffer from power loss due to the added color; existing BIPV colored products also have technical defects such as low light transmittance and high light absorption by pigments, significantly reducing the light reaching the photovoltaic cell surface and resulting in substantial power generation losses.

[0003] Globally, there are currently two main approaches to colored BIPV technology: one is to use colored encapsulating films, and the other is to apply colored pigments to the surface of the photovoltaic front cover glass to achieve the required color. Encapsulating film technology tends to result in the color being divided into individual modules by the photovoltaic cells, leading to poor appearance consistency and low color brightness. Pigment technology, on the other hand, struggles to simultaneously meet requirements such as vibrant colors, good light transmission, high light transmittance, high photovoltaic power generation efficiency, and long lifespan.

[0004] Therefore, there is a need for a colored photovoltaic building integrated module with good color rendering effect, good thermal stability, aging resistance and insulation performance. This module can not only make glass curtain walls present rich and gorgeous colors, but also give buildings the function of generating electricity, thus solving the problem of high building energy consumption of traditional photovoltaic curtain walls. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a colored building-integrated photovoltaic (BIPV) component that can form a high-transmittance color film layer on photovoltaic glass, ensuring uniform color appearance, meeting the special design requirements of buildings for color, and solving the problem of high building energy consumption of traditional photovoltaic curtain walls.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0007] A colored building-integrated photovoltaic (BIPV) module includes a front glass panel, a battery layer, and a rear glass panel. The front glass panel and the battery layer are encapsulated by a first encapsulation layer, and the battery layer and the rear glass panel are connected by a second encapsulation layer. A one-dimensional photonic crystal film is disposed on the surface of the front glass panel. The one-dimensional photonic crystal film is formed by alternating deposition of SiO2 / TiO2 to form photonic crystal particles, which are then mixed with a silicate mixture and fused onto the surface of the front glass panel. An electrochromic layer is disposed on the back of the rear glass panel, which enables the color switching of the building facade by adjusting the light transmittance through voltage.

[0008] The aforementioned colored photovoltaic building integrated module uses a PVB-Al2O3 composite film as the first encapsulation layer.

[0009] In the aforementioned colored building-integrated photovoltaic (BIPV) module, the second encapsulation layer is a PVB film.

[0010] The aforementioned colored photovoltaic building integrated module also has a graphene thermal conductive film on the back of the battery layer for heat dissipation.

[0011] In the aforementioned color photovoltaic building integrated module, a KH560 reinforcement layer is disposed between the second encapsulation layer and the rear glass panel. The KH560 reinforcement layer is a 3-glycidyl ether oxypropyltrimethoxysilane coupling agent filled between the second encapsulation layer and the rear glass panel.

[0012] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0013] This invention provides a colored photovoltaic building integrated module. By fusing a one-dimensional photonic crystal film onto the surface of the front glass panel and setting an electrochromic layer on the back of the rear glass panel, the light transmittance can be adjusted by voltage to change the color of the building facade, thereby forming a high-transmittance color film layer on the photovoltaic glass. The color produced by the one-dimensional photonic crystal film has high color saturation, which can ensure the uniformity and firmness of the color, ensure the homogeneity of the color appearance, and meet the special design requirements of the building for color.

[0014] This invention improves the heat dissipation performance of photovoltaic modules by setting a first encapsulation layer composed of a PVB-Al2O3 composite film and setting a graphene thermal conductive film on the back of the battery layer, thus solving the problem of high building energy consumption in traditional photovoltaic curtain walls. Furthermore, by filling the gap between the second encapsulation layer and the rear glass panel with a KH560 reinforcement layer, the adhesion between the interfaces is enhanced, which greatly improves the reliability of the integrated photovoltaic module. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the specific structure of this utility model.

[0016] The components are: 1. front glass plate, 2. battery layer, 3. rear glass plate, 4. one-dimensional photonic crystal film, 5. first encapsulation layer, 6. graphene thermal conductive film, 7. second encapsulation layer, 8. KH560 reinforcement layer, and 9. electrochromic layer. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] A type of colored building-integrated photovoltaic (BIPV) module, such as Figure 1 As shown, it includes a front glass plate 1, a battery layer 2, and a rear glass plate 3. A one-dimensional photonic crystal film 4 is disposed on the surface of the front glass plate 1. The one-dimensional photonic crystal film 4 is formed by alternating deposition of SiO2 / TiO2 to form photonic crystal particles, which are then mixed with a silicate mixture and melted onto the surface of the front glass plate 1. The thickness of the one-dimensional photonic crystal film 4 is 10-50 μm.

[0019] One-dimensional photonic crystal film 4 produces color through the interference, diffraction and scattering of light by its own microstructure. It has low light absorption and loss, produces colors with high color saturation, and can ensure the uniformity and durability of the colors.

[0020] The front glass plate 1 and the battery layer 2 are encapsulated by a first encapsulation layer 5. The first encapsulation layer 5 is a PVB-Al2O3 composite film, which is formed by adding nano-Al2O3 particles to the PVB material. The Al2O3 particles in the PVB-Al2O3 composite film form a heat conduction channel, which reduces the battery temperature and effectively improves the heat conduction performance.

[0021] The battery layer 2 is connected to the rear glass panel 3 by a second encapsulation layer 7, which is a PVB film.

[0022] A graphene thermal conductive film 6 with a thickness of 10μm is also provided on the back of the battery layer 2. This film serves to dissipate heat and improve the power generation efficiency and durability of the photovoltaic module.

[0023] A KH560 reinforcement layer 8 is provided between the second encapsulation layer 7 and the rear glass panel 3. The KH560 reinforcement layer 8 is a 3-glycidyl ether oxypropyltrimethoxysilane coupling agent filled between the second encapsulation layer 7 and the rear glass panel 3, which can enhance the adhesion of the interface and ensure the reliability of the integrated photovoltaic module.

[0024] An electrochromic layer 9 is provided on the back of the rear glass panel 3. The electrochromic layer 9 can adjust the light transmittance by voltage to achieve color switching of the building facade.

[0025] The assembly process of this utility model is as follows:

[0026] First, photonic crystal particles formed by alternating deposition of SiO2 / TiO2 are mixed with a silicate mixture and then melted onto the surface of the front glass plate 1 to form a one-dimensional photonic crystal film.

[0027] Next, the back side of the rear glass plate 3 is cleaned and surface activated. WO3 is sputtered and deposited on the surface of the rear glass plate 3 to form an electrochromic layer 9. Silver paste electrodes are screen-printed on the back side of the rear glass plate 3, and the electrodes are connected by flexible wires.

[0028] Finally, the front glass plate 1, the first encapsulation layer 5, the battery layer 2, the graphene thermal conductive film 6, the second encapsulation layer 7, the KH560 reinforcement layer 8, and the rear glass plate 3 are stacked in sequence and sent into a vacuum laminator to be laminated at 135°C and 1.2MPa pressure for 30 minutes to form an integrated module.

[0029] This invention provides a colored photovoltaic building integrated module. By fusing a one-dimensional photonic crystal film onto the surface of the front glass panel and setting an electrochromic layer on the back of the rear glass panel, the light transmittance can be adjusted by voltage to change the color of the building facade, thereby forming a high-transmittance color film layer on the photovoltaic glass. The color produced by the one-dimensional photonic crystal film has high color saturation, which can ensure the uniformity and firmness of the color, ensure the homogeneity of the color appearance, and meet the special design requirements of the building for color.

[0030] This invention improves the heat dissipation performance of photovoltaic modules by setting a first encapsulation layer composed of a PVB-Al2O3 composite film and setting a graphene thermal conductive film on the back of the battery layer, thus solving the problem of high building energy consumption in traditional photovoltaic curtain walls. Furthermore, by filling the gap between the second encapsulation layer and the rear glass panel with a KH560 reinforcement layer, the adhesion between the interfaces is enhanced, which greatly improves the reliability of the integrated photovoltaic module.

Claims

1. A colored building integrated photovoltaic module, characterized by: The structure includes a front glass panel (1), a battery layer (2), and a rear glass panel (3). The front glass panel (1) and the battery layer (2) are encapsulated by a first encapsulation layer (5), and the battery layer (2) and the rear glass panel (3) are connected by a second encapsulation layer (7). A one-dimensional photonic crystal film (4) is provided on the surface of the front glass panel (1). The one-dimensional photonic crystal film (4) is formed by alternating deposition of SiO2 / TiO2 to form photonic crystal particles and then melted on the surface of the front glass panel (1) after being mixed with a silicate mixture. An electrochromic layer (9) is provided on the back of the rear glass panel (3) to achieve the color switching of the building facade by adjusting the light transmittance through voltage.

2. The color photovoltaic building integrated module according to claim 1, characterized in that: The first encapsulation layer (5) is a PVB-Al2O3 composite film.

3. The color photovoltaic building integrated module according to claim 1, characterized in that: The second encapsulation layer (7) is a PVB film.

4. A color photovoltaic building integrated module according to claim 1, characterized in that: The back of the battery layer (2) is also provided with a graphene thermal conductive film (6) for heat dissipation.

5. A color photovoltaic building integrated module according to claim 1, characterized in that: A KH560 reinforcing layer (8) is provided between the second encapsulation layer (7) and the rear glass plate (3). The KH560 reinforcing layer (8) is a 3-glycidyl ether oxypropyltrimethoxysilane coupling agent filled between the second encapsulation layer (7) and the rear glass plate (3).

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