Photovoltaic glass

Abstract

The utility model relates to the technical field of photovoltaic glass heat dissipation, and particularly discloses photovoltaic glass which comprises a glass base layer, a coating layer and a heat dissipation layer which are sequentially arranged from top to bottom, the heat dissipation layer comprises a plurality of heat dissipation channels, and the heat dissipation channels are filled with heat-conducting media. According to the photovoltaic glass provided by the utility model, the heat dissipation channel is arranged on the heat dissipation layer, so that the heat dissipation efficiency of the photovoltaic glass is obviously and effectively improved, and the photovoltaic glass can be maintained in a proper working temperature range under various working conditions, thereby effectively avoiding performance reduction or faults caused by overheating, and prolonging the service life of the photovoltaic glass. Therefore, continuous and stable operation and efficient power generation of the photovoltaic system are guaranteed, and the overall service life of the photovoltaic module is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic glass heat dissipation technology, and in particular to a photovoltaic glass. Background Technology

[0002] With the increasing global demand for clean energy, photovoltaic (PV) power generation has been widely adopted as a renewable energy technology. PV glass is a crucial component of PV modules, and its performance directly affects the power generation efficiency and lifespan of the modules. However, during operation, PV glass absorbs a significant amount of heat. If heat cannot be dissipated effectively and promptly, the temperature of the PV module will rise, thereby reducing its power generation efficiency and lifespan.

[0003] Currently, common heat dissipation methods for photovoltaic glass mainly include natural heat dissipation and forced air cooling. Natural heat dissipation has low efficiency and is difficult to meet the heat dissipation requirements of a single-power photovoltaic module; forced air cooling requires additional fan equipment, increasing the complexity and cost of the system.

[0004] For example, a patent document with a filing date of February 10, 2020 and Chinese patent application number 202020159570.6 discloses a glass backplate for photovoltaic module encapsulation, which includes a flat glass (1) and a coating layer (2) located on the surface of the flat glass (1), the coating layer (2) having a porous structure.

[0005] The inventors of this application discovered that this type of glass backsheet for photovoltaic module encapsulation, by coating a mesh-like, highly reflective coating layer on the surface of flat glass, with a porous structure, increases the contact area between the coating layer and air during the quenching and cooling process, thereby improving the cooling intensity of the coating layer. However, it still cannot achieve the expected heat dissipation efficiency. As the temperature rises, the conductivity, photoelectric conversion efficiency, and other properties of the solar cells will be affected, reducing the photovoltaic power generation efficiency. Excessively high temperatures may also lead to serious phenomena such as module burn-through and glass panel thermal explosion, further reducing the service life of the photovoltaic module.

[0006] In view of this, the existing technology should be improved in order to solve the aforementioned technical problems. Utility Model Content

[0007] The main purpose of this invention is to provide a photovoltaic glass that significantly and effectively improves the heat dissipation efficiency of the photovoltaic glass by setting heat dissipation channels in the heat dissipation layer. This ensures that the photovoltaic glass can maintain a suitable operating temperature range under various operating conditions, thereby effectively avoiding performance degradation or failure caused by overheating, and thus ensuring the continuous and stable operation and efficient power generation of the photovoltaic system, and extending the overall service life of the photovoltaic module.

[0008] According to one aspect of the present invention, a photovoltaic glass is provided, comprising a glass substrate, a coating layer and a heat dissipation layer arranged sequentially from top to bottom, wherein the heat dissipation layer includes a plurality of heat dissipation channels and the heat dissipation channels are filled with a thermally conductive medium.

[0009] In some embodiments, the heat dissipation channel extends through two opposite sidewalls of the heat dissipation layer.

[0010] In some embodiments, the cross-section of the heat dissipation channel is circular and / or elliptical and / or rectangular and / or triangular and / or hexagonal.

[0011] In some embodiments, the thermally conductive medium is thermally conductive silicone and / or thermally conductive oil and / or thermally conductive adhesive and / or thermally conductive grease.

[0012] In some embodiments, the surface of the coating layer is covered with an anti-reflective film.

[0013] In some embodiments, the glass substrate is ultra-clear glass.

[0014] In some embodiments, the heat dissipation channel is a plurality of parallel elongated channels.

[0015] In some embodiments, the heat dissipation channel is a plurality of uniformly distributed U-shaped channels.

[0016] In some embodiments, the openings of the heat dissipation channel on the sidewall are a first opening and a second opening, and the cross-sectional area of ​​the heat dissipation channel gradually decreases along the direction extending from the first opening to the second opening.

[0017] In some embodiments, the first opening extends toward the second opening along the width direction of the heat dissipation layer.

[0018] The photovoltaic glass of this utility model significantly and effectively improves the heat dissipation efficiency of the photovoltaic glass by setting heat dissipation channels in the heat dissipation layer, ensuring that the photovoltaic glass can be maintained within a suitable operating temperature range under various operating conditions, thereby effectively avoiding performance degradation or failure caused by overheating, thus ensuring the continuous and stable operation and efficient power generation of the photovoltaic system, and extending the overall service life of the photovoltaic module. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some implementation examples of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a photovoltaic glass according to an exemplary embodiment of the present invention is shown;

[0021] Figure 2 Three views of a photovoltaic glass according to an exemplary embodiment of the present invention are shown;

[0022] Figure 3 A structural diagram of a heat dissipation layer of a photovoltaic glass according to an exemplary embodiment of the present invention is shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Glass substrate; 2. Coating layer; 3. Heat dissipation layer; 4. Heat dissipation channel; 5. First opening; 6. Second opening. Detailed Implementation

[0025] The following detailed description of the embodiments is used to exemplify the principles of the present invention, but should not be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0026] These embodiments are provided to make this disclosure thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0027] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0029] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0030] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0031] like Figure 1-2 As shown, this utility model provides a photovoltaic glass, which includes a glass base layer 1, a coating layer 2, and a heat dissipation layer 3 arranged sequentially from top to bottom. The glass base layer 1 is used to protect the glass protective panel of the solar converter; the coating layer 2 is used to enhance solar energy absorption; the heat dissipation layer 3 is used to install pipes and heat-conducting medium, and includes several heat dissipation channels 4. By designing a densely distributed pipe structure that can conduct heat at high speed, the heat dissipation efficiency of the photovoltaic glass can be effectively solved. The heat dissipation channels 4 are filled with heat-conducting medium, which can quickly conduct heat to the wall of the channel and exchange heat with the external environment through the wall, thereby achieving efficient heat dissipation.

[0032] In some embodiments, the heat dissipation channel 4 penetrates two opposite sidewalls of the heat dissipation layer 3. The penetration of the heat dissipation channel 4 through the sidewalls allows the heat-conducting medium to make more sufficient contact with the interior of the heat dissipation layer 3, thereby increasing the heat exchange area, improving heat dissipation efficiency, and helping to form a more direct and efficient heat conduction path. Heat can be carried away more quickly through the heat dissipation channel 4, reducing the temperature of the heat dissipation layer 3.

[0033] In some embodiments, the cross-section of the heat dissipation channel 4 is circular and / or elliptical and / or rectangular and / or triangular and / or hexagonal. A rectangular cross-section is one of the most common shapes in ventilation ducts, characterized by its simple structure and high strength. With the same cross-sectional area, the triangular heat dissipation channel 4 has a relatively larger convective heat transfer area, which helps to improve heat dissipation efficiency. Preferably, the cross-section of the heat dissipation channel 4 is circular. Due to its streamlined design, a circular cross-section duct can reduce pressure loss of airflow or liquid flow within the channel, thereby improving heat dissipation efficiency. For the same cross-sectional area, a circular duct has smaller external dimensions, which is beneficial for saving space.

[0034] In some embodiments, the thermally conductive medium is thermally conductive silicone and / or thermally conductive oil and / or thermally conductive adhesive and / or thermally conductive grease. Thermally conductive silicone has a high thermal conductivity, enabling rapid heat transfer, while also possessing good insulation properties to ensure electrical safety. It also maintains stable performance over a wide temperature range, making it suitable for various extreme working environments. Thermally conductive grease can fill the tiny gaps between the heat source and the heat dissipation layer 3, reducing interfacial thermal resistance and improving heat transfer efficiency. Thermally conductive silicone, thermally conductive oil, thermally conductive adhesive, and thermally conductive grease each have their unique beneficial effects when used as thermally conductive media. In practical applications, the most suitable thermally conductive medium should be selected based on a comprehensive consideration of specific heat dissipation requirements, working environment, and cost budget.

[0035] In some embodiments, the surface of the coating layer 2 is coated with an anti-reflective film. The main function of the anti-reflective film is to increase the amount of light transmitted by reducing or eliminating reflected light from the surface of the photovoltaic glass. In the photovoltaic field, this means that more sunlight can penetrate the coating layer 2, be absorbed by the photovoltaic cells, and be converted into electrical energy. After adding a 50-nanometer-thick anti-reflective film, the photoelectric conversion efficiency can be significantly improved, which is of great significance for increasing the overall power generation of the photovoltaic system and reducing costs. The anti-reflective film not only improves the light transmittance of the photovoltaic glass, but also protects the glass surface from factors such as oxidation, corrosion, and scratches to a certain extent. This helps to extend the service life of the photovoltaic glass and maintain its long-term stable performance. In addition, some anti-reflective films also have superhydrophobic and self-cleaning functions, which can further reduce the adhesion of dust and dirt, keeping the photovoltaic glass clean and operating efficiently.

[0036] In some embodiments, the glass substrate 1 is ultra-clear glass. Ultra-clear glass is characterized by high light transmittance and low iron content. The light transmittance of ultra-clear glass can typically reach over 91.5%, thus ensuring that more light penetrates the glass and enters the room or is used in fields such as photovoltaic power generation. Because the iron content in ultra-clear glass is extremely low, only ten percent or even less of that in ordinary glass, it absorbs less of the green wavelength in visible light, ensuring the consistency of glass color and thus enabling ultra-clear glass to display colors more realistically.

[0037] like Figure 3As shown, in some embodiments, the heat dissipation channel 4 is a plurality of parallel elongated channels. The design of the elongated heat dissipation channel 4 allows for more efficient use of space, making the heat transfer path within the heat dissipation layer 3 clearer and more efficient. This design helps heat to be rapidly conducted from the inside of the photovoltaic glass to the heat dissipation layer 3 and quickly dissipated through the heat dissipation channel 4, thereby reducing the temperature and improving its operating efficiency and stability. The elongated heat dissipation channel 4 not only plays a role in heat dissipation in the photovoltaic glass but also enhances the structural strength of the module. Because the channels are parallel to each other, they can form a certain supporting structure, making the photovoltaic module more stable when subjected to external forces such as wind pressure and snow pressure, thereby helping to improve the durability and service life of the photovoltaic module.

[0038] In some embodiments, the heat dissipation channel 4 is a plurality of uniformly distributed U-shaped channels. The design of the U-shaped channels facilitates the conduction and convection of heat within the heat dissipation layer 3. Heat is transferred to the heat dissipation layer 3 by thermal conduction, and then rapidly dissipated through convection within the U-shaped channels. Because the U-shaped channels have a certain depth and width, they can accommodate more heat-conducting medium, thereby improving heat dissipation efficiency.

[0039] In some embodiments, the heat dissipation channel 4 has a first opening 5 and a second opening 6 on its sidewall, and the cross-sectional area of ​​the heat dissipation channel 4 gradually decreases along the direction extending from the first opening 5 to the second opening 6. As the cross-sectional area of ​​the heat dissipation channel 4 gradually decreases, according to the principles of fluid dynamics, the flow velocity of the fluid in the channel will increase accordingly. The increase in flow velocity helps heat to be transferred and dissipated more quickly, thereby improving heat dissipation efficiency.

[0040] In some embodiments, the first opening 5 extends toward the second opening 6 along the width direction of the heat dissipation layer 3. The extension of the first opening 5 along the width direction of the heat dissipation layer 3 facilitates horizontal convection of the heat-conducting medium within the heat dissipation channel 4, thereby accelerating heat dissipation. This convective heat dissipation is more efficient than simple heat conduction and can significantly improve heat dissipation efficiency.

[0041] A specific application of this invention is as follows: During the operation of a photovoltaic module, the heat absorbed by the photovoltaic glass is transferred to the heat dissipation layer 3 through the glass substrate 1. The heat-conducting medium in the heat dissipation layer 3 can quickly conduct the heat to the wall of the channel and exchange heat with the external environment through the wall, thereby achieving efficient heat dissipation.

[0042] This utility model has at least the following advantages:

[0043] (1) The heat-conducting medium in the heat dissipation layer 3 can quickly conduct the heat absorbed by the photovoltaic glass to the wall of the channel. The heat transfer efficiency is high in this process, which helps to quickly reduce the temperature of the photovoltaic glass.

[0044] (2) As the operating temperature decreases, the photoelectric conversion efficiency of the photovoltaic module will increase accordingly. This is because the photoelectric conversion efficiency of the photovoltaic cell is closely related to its operating temperature, and lowering the temperature helps to improve performance.

[0045] (3) Photovoltaic modules are the core components of a photovoltaic system, and their performance directly affects the efficiency of the entire system. By improving the heat dissipation performance of photovoltaic modules, the efficiency of the entire photovoltaic system can be indirectly improved.

[0046] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the framework of the present invention, technical features of the above embodiments or different embodiments can also be combined, and many other variations of different aspects of the present invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A photovoltaic glass, characterized in that, The glass-based layer (1), the coating layer (2) and the heat dissipation layer (3) are sequentially arranged from top to bottom, the heat dissipation layer (3) comprises a plurality of heat dissipation channels (4), and the heat dissipation channels (4) are filled with a heat-conducting medium.

2. Photovoltaic glass according to claim 1, characterized in that The heat dissipation channels (4) penetrate through two opposite side walls of the heat dissipation layer (3).

3. Photovoltaic glass according to claim 1, characterized in that The cross section of the heat dissipation channels (4) is circular and / or elliptical and / or rectangular and / or triangular and / or hexagonal.

4. The photovoltaic glass according to claim 1, characterized in that, The heat-conducting medium is heat-conducting silica gel and / or heat-conducting oil and / or heat-conducting glue and / or heat-conducting silicone grease.

5. The photovoltaic glass according to claim 1, characterized in that, The surface of the coating layer (2) is coated with an anti-reflection film.

6. The photovoltaic glass according to claim 1, characterized in that, The glass-based layer (1) is super white glass.

7. The photovoltaic glass according to claim 1, characterized in that, The heat dissipation channels (4) are a plurality of parallel strip-shaped channels.

8. The photovoltaic glass according to claim 1, characterized in that, The heat dissipation channels (4) are a plurality of uniformly distributed U-shaped channels.

9. The photovoltaic glass according to claim 2, characterized in that, The openings of the heat dissipation channels (4) on the side walls are first openings (5) and second openings (6), and the cross-sectional area of the heat dissipation channels (4) gradually decreases along the direction in which the first openings (5) extend to the second openings (6).

10. Photovoltaic glass according to claim 9, characterized in that The first openings (5) extend to the second openings (6) along the width direction of the heat dissipation layer (3).

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