Intelligent dimming BIPV glass, control system and building

Abstract

The utility model relates to the technical field of glass, in particular to intelligent dimming building integrated photovoltaics (BIPV) glass, a control system and a building, and the glass comprises a first glass substrate, a first film, a light-transmitting solar cell chip, a second film, a dimming film, a third film and a second glass substrate which are sequentially laminated and compounded. According to the intelligent dimming BIPV glass, multiple functions of photovoltaic power generation, lighting and intelligent sight shielding are integrated into a whole, the intelligent dimming BIPV glass is used on a photovoltaic building integrated glass curtain wall, the function that the light transmittance of the intelligent dimming BIPV glass can be freely changed is achieved, the occupied space of the intelligent dimming BIPV glass on a building door and window is extremely small, a mechanism and space for arranging a curtain are omitted, and the intelligent dimming BIPV glass is convenient to use. The manufactured window glass is as free and convenient as a curtain with an electric control device, and is particularly suitable for use scenes at the top of a building; the processing technology is relatively simple and suitable for batch processing, the thickness and the type of the glass can be selected according to design requirements, and diversified and differentiated customized processing production is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of glass, in particular to an intelligent dimming BIPV glass, a control system and a building. Background Art

[0002] BIPV (Building Integrated Photovoltaic) is a technology that integrates solar power generation (photovoltaic) products into buildings. With the application and promotion of BIPV, the demand for its derived composite products is becoming increasingly strong. Among them, the demand for shading, privacy and heat insulation of photovoltaic curtain walls and photovoltaic skylights is also gradually increasing. With the continuous improvement of living standards, traditional sunshade and blinds control methods can no longer meet the demand for intelligent control.

[0003] In order to meet the lighting needs of building glass curtain walls, BIPV photovoltaic glass components often use light-transmitting products. In practical applications, curtains, blinds, etc. are often installed for the purpose of privacy protection or sunshade under strong light. This not only increases the occupied space of the building, but also makes it inconvenient for later maintenance. For example, although the built-in electric curtains or electric blinds for doors and windows have achieved the purpose of integrating sunshades and glass doors and windows, the internal mechanical mechanisms and motors are prone to failure after repeated recycling. After the failure, the built-in curtains are distributed in a messy manner, causing a bad visual appearance of the glass. Moreover, electric curtains or electric blinds are more suitable for vertical installation, and horizontal installation will increase the failure rate to a greater extent. However, the building lighting top glass often needs to be installed in an approximately horizontal manner, which makes curtain-style shading unusable. Utility Model Content

[0004] The purpose of the utility model is to provide an intelligent dimming BIPV glass, control system and building to address the problems in the prior art that the existing BIPV photovoltaic glass components adopt a curtain-type shading structure, which increases the occupied space of the building, is inconvenient for subsequent maintenance, and cannot be used in the scene of use on the top of the building.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] In a first aspect, the utility model provides an intelligent dimming BIPV glass, comprising a first glass substrate, a first film, a light-transmitting solar cell chip, a second film, a dimming film, a third film and a second glass substrate which are sequentially stacked and composited.

[0007] The intelligent dimming BIPV glass described in the utility model is adopted to realize the integration of multiple functions of photovoltaic power generation, lighting, and intelligent sight shielding. When used on the integrated glass curtain wall of photovoltaic buildings, it not only has the function of freely changing its light transmittance, but also occupies very little space on the doors and windows of the building, eliminating the need for the mechanism and space for setting up curtains. The window glass made is as convenient as curtains with electronic control devices, and is particularly suitable for use in the top scenes of buildings. The processing technology is relatively simple and suitable for batch processing. The thickness and type of glass can be selected according to design requirements to realize diversified and differentiated customized processing and production.

[0008] As a preferred technical solution of the utility model, the light-transmitting solar cell chips include a plurality of chips, which are connected in series, in parallel or in series and in parallel.

[0009] As a further preferred technical solution of the utility model, a photovoltaic lead-in conductor is provided on the side of the light-transmitting solar cell chip facing the first film and / or on the side facing the second film, and the photovoltaic lead-in conductor is connected to a photovoltaic junction box, and the photovoltaic junction box is arranged on the side of the BIPV glass.

[0010] As a further preferred technical solution of the utility model, the dimming film electrode lead-out wire of the dimming film is arranged on the other side of the BIPV glass opposite to the photovoltaic junction box.

[0011] As a preferred technical solution of the utility model, the area of ​​the light-transmitting solar cell chip accounts for greater than or equal to 90% of the area of ​​the first glass substrate, and / or the area of ​​the dimming film accounts for greater than or equal to 90% of the area of ​​the first glass substrate.

[0012] As a preferred technical solution of the utility model, the edge of the dimming film is located 10mm-20mm inside the edge of the first glass substrate.

[0013] As a preferred technical solution of the utility model, a waterproof coating is coated on the edge side of the BIPV glass.

[0014] In a second aspect, the utility model further provides a control system for the intelligent dimming BIPV glass as described in any one of the above items, comprising:

[0015] A photovoltaic inverter control system connected to the light-transmitting solar cell chip of at least one of the intelligent dimming BIPV glass, the photovoltaic inverter control system being used to convert the direct current generated by the light-transmitting solar cell chip into alternating current;

[0016] A dimming control system is connected to the dimming film of at least one piece of the intelligent dimming BIPV glass, the dimming control system is connected to the photovoltaic inverter control system, and the photovoltaic inverter control system is connected to the mains power grid.

[0017] The control system of the intelligent dimming BIPV glass described in the utility model provides a new product and technical solution for the photovoltaic building integration market, giving the product the dual functions of photovoltaic power generation and intelligent dimming. Compared with the existing technical solutions, it is more suitable for the application and implementation of photovoltaic building integration.

[0018] As an optimal technical solution of the utility model, the photovoltaic inverter control system includes a photovoltaic inverter-control integrated machine and a metering and switching controller, the photovoltaic inverter-control integrated machine is connected to the metering and switching controller, and the metering and switching controller is respectively connected to the mains power grid and the dimming control system.

[0019] In a third aspect, the utility model also provides a building installed with the smart dimming BIPV glass as described in any one of the above items or installed with a control system of the smart dimming BIPV glass as described in any one of the above items.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0021] 1. The intelligent dimming BIPV glass described in the utility model realizes the integration of multiple functions of photovoltaic power generation, lighting, and intelligent sight shielding. When used on the photovoltaic building integrated glass curtain wall, it not only has the function of freely changing its light transmittance, but also occupies very little space on the doors and windows of the building, eliminating the need for the mechanism and space for setting up curtains. The window glass produced is as convenient as curtains with electronic control devices, and is particularly suitable for use on the top of the building; the processing technology is relatively simple, suitable for batch processing, and the thickness and type of glass can be selected according to design requirements to achieve diversified and differentiated customized processing and production;

[0022] 2. The control system of the intelligent dimming BIPV glass described in the utility model provides a new product and technical solution for the photovoltaic building integration market, giving the product the dual functions of photovoltaic power generation and intelligent dimming. Compared with the existing technical solutions, it is suitable for the application and implementation of photovoltaic building integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of the intelligent dimming BIPV glass;

[0024] Figure 2 This is a plan view of the smart dimming BIPV glass;

[0025] Figure 3 Schematic diagram of the control system of intelligent dimming BIPV glass.

[0026] Markings in the figure: 1-first glass substrate, 2-first film, 3-light-transmitting solar cell chip, 4-photovoltaic busbar lead wire, 5-second film, 6-dimming film, 7-dimming film electrode lead wire, 71-dimming film positive electrode lead wire, 72-dimming film negative electrode lead wire, 8-third film, 9-second glass substrate, 10-photovoltaic junction box, 101-junction box positive electrode lead wire, 102-junction box negative electrode lead wire. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0028] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0030] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0031] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0032] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0033] In the related art, although built-in electric curtains or electric blinds for doors and windows are used to integrate sunshades and glass doors and windows, the internal mechanical mechanisms and motors are prone to malfunctions after repeated use, resulting in failure. After a failure, the built-in curtains are scattered in a disorderly manner, causing a bad visual effect on the glass appearance. Moreover, electric curtains or electric blinds are more suitable for vertical installation, and horizontal installation will increase the failure rate to a greater extent. However, building skylight glass often needs to be installed in an approximately horizontal manner, which makes curtain-type shading unusable. For this reason, the technical solution of the present application is generated, and the following is combined with Figures 1 to 3 To elaborate.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, the intelligent dimming BIPV glass described in the utility model includes a first glass substrate 1, a first film 2, a light-transmitting solar cell chip 3, a second film 5, a dimming film 6, a third film 8 and a second glass substrate 9 which are sequentially stacked and composited.

[0036] Among them, the light-transmitting solar cell chips 3 include a plurality of them, and are arranged in series, parallel or series-parallel. The light-transmitting solar cell chip 3 is provided with a photovoltaic lead-in conductor 4 on the side facing the first film 2 and / or on the side facing the second film 5. The photovoltaic lead-in conductor 4 is connected to a photovoltaic junction box 10. The photovoltaic junction box 10 is arranged on the side of the BIPV glass. The dimming film electrode lead-out wire 7 of the dimming film 6 is arranged on the other side of the BIPV glass opposite to the photovoltaic junction box 10, which can effectively prevent internal circuit crossover.

[0037] In some specific implementations, the first glass substrate 1 can be made of ordinary glass or tempered glass, and can be made of one of ordinary white glass, ultra-white glass, colored glaze glass, etc. The first glass substrate 1 can also be made of coated glass. In this embodiment, the first glass substrate 1 preferably uses ultra-white tempered glass with high light transmittance.

[0038] In some specific embodiments, the first film 2 can be made of PVB (Polyvinyl Butyral) film, EVA (ethylene-vinyl acetate copolymer) film or SGP (DuPont In this embodiment, the first film 2 is preferably a high light transmittance PVB film.

[0039] In some specific implementations, the light-transmitting solar cell chip 3 may be a cadmium telluride solar cell, a perovskite solar cell, a copper indium gallium selenide thin film solar cell, etc. In this embodiment, the light-transmitting solar cell chip 3 preferably uses a 3.2 mm thick cadmium telluride solar cell. Cadmium telluride solar cells with different transmittances may also be selected.

[0040] In some specific implementations, the drain bars and bus bars of the photovoltaic bus conductor 4 are applied on the light-transmitting solar cell chip 3 .

[0041] In some specific implementations, the second film 5 can be a PVB film, an EVA film or an SGP film. In this embodiment, the second film 5 is preferably a high-transmittance PVB film.

[0042] In some specific implementations, the dimming film 6 is a liquid crystal dimming film. The liquid crystal dimming film is a liquid crystal / polymer mixed material injected between two transparent conductive films. In the absence of an electric field, the liquid crystal dimming film is in an opaque state. When an alternating current is applied, the liquid crystal molecules are arranged in an orderly manner, and the electroluminescent dimming film is then converted from an opaque state (OFF state) to a transparent state (ON state); through the action of an electric field, a rapid conversion from an on state to an off state, and from an off state to an on state can be achieved.

[0043] In some specific implementations, the third film 8 may be a PVB film, an EVA film or an SGP film. In this embodiment, the third film 8 is preferably a high-transmittance PVB film.

[0044] In some specific implementations, the second glass substrate 9 can be made of ordinary glass or tempered glass, and can be made of one of ordinary white glass, ultra-white glass, colored glaze glass, etc. The second glass substrate 9 can also be made of coated glass. In this embodiment, the second glass substrate 9 preferably uses ultra-white tempered glass with high light transmittance.

[0045] The above-mentioned products are stacked in sequence to form a crude intelligent dimming BIPV glass, which is then laminated or autoclaved to form a finished intelligent dimming BIPV glass. The finished product can be installed on the building structure as a photovoltaic glass component alone, or combined with other glass to form photovoltaic laminated insulating glass, etc., thereby further improving the product's thermal insulation and sound insulation performance.

[0046] In a specific embodiment, the PVB film is used as the bonding layer, and the thickness of the PVB film is ≥ 0.76 mm, which ensures the bonding strength of the product and can ensure that the PVB film softens and flows during the high temperature and high pressure process to fully fill the concave and convex surfaces of the solar cell and the dimming film 6, thereby reducing quality defects such as back-bubbling in the later stage.

[0047] In a specific embodiment, Figure 2 As shown, the photovoltaic busbars 4 are arranged along the two longer edge positions of the intelligent dimming BIPV glass, and then turn to a shorter side to connect to the photovoltaic junction box 10, that is, the photovoltaic busbars 4 in this embodiment include two L-shaped components, and the photovoltaic junction box 10 is provided with a junction box positive lead 101 and a junction box negative lead 102; the dimming film 6 is provided with two busbars at the edge position of the other short side, and the dimming film electrode lead 7 includes a dimming film positive lead 71 and a dimming film negative lead 72, and the two busbars are respectively connected.

[0048] In a specific embodiment, the area of ​​the light-transmitting solar cell chip 3 accounts for greater than or equal to 90% of the area of ​​the first glass substrate 1 , and / or the area of ​​the dimming film 6 accounts for greater than or equal to 90% of the area of ​​the first glass substrate 1 .

[0049] In a specific embodiment, the edge of the dimming film 6 is located 10mm-20mm inside the edge of the first glass substrate 1, which not only ensures the dimming area, but also the dimming film 6 is protected in the laminated glass, which can effectively block the penetration of water vapor and prevent the dimming film 6 of the liquid crystal from failing in a hot and humid environment.

[0050] In a specific embodiment, after the interlayer composite processing is completed, a waterproof coating is applied to the side of the BIPV glass edge, such as BD101 laminated glass edge protection coating, Dow 5500 laminated glass edge sealing protective agent, etc., to further block water vapor penetration and increase product service life.

[0051] In a specific embodiment, the smart dimming BIPV glass can be further composited with LOW-E glass to improve the thermal insulation performance of the product.

[0052] The intelligent dimming BIPV glass described in this embodiment integrates multiple functions of photovoltaic power generation, lighting, and intelligent sight shielding. When used on the integrated glass curtain wall of photovoltaic buildings, it not only has the function of freely changing its light transmittance, but also occupies very little space on the doors and windows of the building, eliminating the need for the mechanism and space for setting up curtains. The window glass produced is as convenient as curtains with electronic control devices, and is particularly suitable for use on the top of buildings. The processing technology is relatively simple and suitable for batch processing. The thickness and type of glass can be selected according to design requirements to achieve diversified and differentiated customized processing and production.

[0053] Example 2

[0054] like Figures 1 to 3 As shown, the control system of the intelligent dimming BIPV glass described in the utility model as described in Example 1 includes a photovoltaic inverter control system and a dimming control system.

[0055] like Figure 3 As shown, the photovoltaic inverter control system includes a photovoltaic inverter-control integrated machine and a metering and switching controller, the photovoltaic inverter-control integrated machine is connected to the light-transmitting solar cell chip 3 of at least one piece of the intelligent dimming BIPV glass, the photovoltaic inverter-control integrated machine is used to convert the direct current generated by the light-transmitting solar cell chip 3 into alternating current, the photovoltaic inverter-control integrated machine is connected to the metering and switching controller, and the metering and switching controller is connected to the mains power grid or other electrical equipment. Specifically, the positive lead wire 101 of the junction box and the negative lead wire 102 of the junction box of each piece of the intelligent dimming BIPV glass are connected to the photovoltaic inverter-control integrated machine.

[0056] like Figure 3As shown, the dimming control system includes a dimming control module and a sensor. The dimming control module is connected to the dimming film 6 of at least one piece of the smart dimming BIPV glass. The dimming control module is connected to the metering and switching controller. The sensor can detect environmental parameters such as sunlight intensity and temperature, and send a signal to the dimming control module. The dimming control module performs intelligent dimming on the dimming film 6 according to the signal to realize the dimming function of the smart dimming BIPV glass. Specifically, the positive lead wire 71 of the dimming film and the negative lead wire 72 of the dimming film of each piece of the smart dimming BIPV glass are connected to the dimming control module.

[0057] After multiple pieces of the intelligent dimming BIPV glass are connected in series and parallel, direct current is input into the photovoltaic inverter, and then alternating current is output to the metering and switching controller, and can be connected to the mains power grid. When the photovoltaic power generation is greater than the consumption of the load equipment, it can be transmitted to the mains power grid. When the photovoltaic power generation is not enough to support the load equipment, the mains power grid supplies power to the load equipment and the dimming control system.

[0058] The control system of the intelligent dimming BIPV glass described in this embodiment provides a new product and technical solution for the photovoltaic building integration market, giving the product the dual functions of photovoltaic power generation and intelligent dimming. Compared with existing technical solutions, it is more suitable for the application and implementation of photovoltaic building integration.

[0059] Example 3

[0060] A building described in the utility model is installed with the intelligent dimming BIPV glass as described in Example 1 or with the control system of the intelligent dimming BIPV glass as described in Example 2.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A smart dimming BIPV glass, characterized in that: It comprises a first glass substrate (1), a first film (2), a light-transmitting solar cell chip (3), a second film (5), a dimming film (6), a third film (8) and a second glass substrate (9) which are laminated and composited in sequence.

2. The intelligent dimming BIPV glass according to claim 1, characterized in that: The light-transmitting solar cell chips (3) include a plurality of chips, which are connected in series, in parallel or in series-parallel arrangement.

3. The intelligent dimming BIPV glass according to claim 2, characterized in that: A photovoltaic busbar wire (4) is provided on the side of the light-transmitting solar cell chip (3) facing the first film (2) and / or on the side facing the second film (5); the photovoltaic busbar wire (4) is connected to a photovoltaic junction box (10); and the photovoltaic junction box (10) is provided on the side of the BIPV glass.

4. The intelligent dimming BIPV glass according to claim 3, characterized in that: The dimming film electrode lead wire (7) of the dimming film (6) is arranged on the other side of the BIPV glass opposite to the photovoltaic junction box (10).

5. The intelligent dimming BIPV glass according to claim 1, characterized in that: The ratio of the area of ​​the light-transmitting solar cell chip (3) to the area of ​​the first glass substrate (1) is greater than or equal to 90%, and / or the ratio of the area of ​​the dimming film (6) to the area of ​​the first glass substrate (1) is greater than or equal to 90%.

6. The intelligent dimming BIPV glass according to claim 1, characterized in that: The edge of the dimming film (6) is located 10 mm to 20 mm inside the edge of the first glass substrate (1).

7. The smart dimming BIPV glass according to any one of claims 1 to 6, characterized in that: The edges of BIPV glass are coated with a waterproof coating.

8. A control system for the intelligent dimming BIPV glass according to any one of claims 1 to 7, characterized in that: include: A photovoltaic inverter control system connected to the light-transmitting solar cell chip (3) of at least one piece of the intelligent dimming BIPV glass, the photovoltaic inverter control system being used to convert direct current generated by the light-transmitting solar cell chip (3) into alternating current; A dimming control system is connected to the dimming film (6) of at least one piece of the intelligent dimming BIPV glass, the dimming control system is connected to the photovoltaic inverter control system, and the photovoltaic inverter control system is connected to the mains power grid.

9. The control system of the intelligent dimming BIPV glass according to claim 8, characterized in that: The photovoltaic inverter control system comprises a photovoltaic inverter-control integrated machine and a metering and switching controller, wherein the photovoltaic inverter-control integrated machine is connected to the metering and switching controller, and the metering and switching controller is respectively connected to the mains power grid and the dimming control system.

10. A building, characterized in that: A control system is installed with the smart dimming BIPV glass as described in any one of claims 1 to 7 or a control system is installed with the smart dimming BIPV glass as described in any one of claims 8 to 9.

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