Photovoltaic photo-thermal coupling structure

Abstract

The utility model provides a photovoltaic photo-thermal coupling structure, which comprises a semitransparent photovoltaic cell and a photo-thermal reflecting mirror, and the semitransparent photovoltaic cell and the photo-thermal reflecting mirror are bonded and fixed through an adhesive layer, or the semitransparent photovoltaic cell and the photo-thermal reflecting mirror are packaged and fixed through a vacuum packaging film. Or the semitransparent photovoltaic cell and the photo-thermal reflector are pressed and fixed through glass, or the semitransparent photovoltaic cell and the photo-thermal reflector are connected and fixed through a buckle. The photovoltaic photo-thermal coupling structure provided by the utility model can effectively enhance structural stability and environmental adaptability, and can be applied to photo-thermal power stations such as a tower type photo-thermal power station, a slot type photo-thermal power station, a Fresnel type photo-thermal power station, a disc type photo-thermal power station and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic light heat coupling technical field especially is related to a photovoltaic light heat coupling structure. BACKGROUND

[0002] As an important innovation of efficient utilization of solar energy resources, photovoltaic light heat coupling technology can realize photoelectric and photothermal conversion simultaneously, and is a breakthrough in the field of modern energy. By combining photovoltaic components with light-heat reflectors, short-wave light is used for power generation, and long-wave light is used for heat conversion, thereby realizing full-band utilization of solar spectrum. This coupling method not only improves the overall efficiency of the system, but also reduces the limitations of single technology, and has important strategic significance in energy structure transformation.

[0003] In actual operation environment, photovoltaic light heat coupling systems usually need to withstand harsh weather conditions such as high temperature, high humidity, and strong ultraviolet radiation for a long time. Therefore, the coupling material and structure design of photovoltaic cells and light-heat collectors must have excellent weather resistance, light transmission, and anti-aging properties. However, the traditional photovoltaic light heat coupling system uses rigid welding method to realize fixation, and the welding method has high requirements for the thermal expansion matching of materials. In long-term high-temperature operation, interface fatigue and crack propagation problems are easy to occur, thereby affecting the stability and adaptability of the system. SUMMARY

[0004] In view of the above problems, the utility model provides a photovoltaic light heat coupling structure which can effectively enhance the structural stability and environmental adaptability.

[0005] The utility model provides a photovoltaic light heat coupling structure, including translucent photovoltaic cell and light heat reflector, translucent photovoltaic cell with light heat reflector between through the adhesive layer bonding fixedly;

[0006] A layer of adhesive layer is provided between the translucent photovoltaic cell and the light heat reflector, and the adhesive layer is a UV-cured transparent silicone layer, a hot melt type EVA adhesive layer or an epoxy resin adhesive layer;

[0007] Alternatively, a double-layer adhesive layer is provided between the translucent photovoltaic cell and the light heat reflector, the double-layer adhesive layer includes an upper adhesive layer and a lower adhesive layer which are bonded to each other, the upper adhesive layer is bonded to the translucent photovoltaic cell, and the upper adhesive layer is a UV-cured transparent silicone layer;The lower adhesive layer is bonded to the light heat reflector, and the lower adhesive layer is a hot melt type EVA adhesive layer.

[0008] The utility model provides a photovoltaic light heat coupling structure, including mutually pasting arrangement's translucent photovoltaic cell and light heat reflector, be equipped with vacuum packaging film outside translucent photovoltaic cell and light heat reflector, the translucent photovoltaic cell with light heat reflector is fixed through vacuum packaging film close pasting between.

[0009] Wherein, the vacuum packaging film is a heat shrinkable film completely wrapped outside the translucent photovoltaic cell and the light heat reflector, the heat shrinkable film is a fluorinated polymer film or a polyurethane film;

[0010] Or, the vacuum packaging film is a heat shrinkable film wrapped around the outer periphery of the translucent photovoltaic cell and the light heat reflector, the heat shrinkable film is a polyvinyl butyral film or a polyester heat shrinkable film;

[0011] Or, the vacuum packaging film is a flexible airbag completely wrapped outside the translucent photovoltaic cell and the light heat reflector, the flexible airbag is a polyimide airbag or a polyvinyl butyral airbag.

[0012] The utility model provides a photovoltaic light heat coupling structure, including translucent photovoltaic cell and light heat reflector, micron level vacuum grid layer is bonded between translucent photovoltaic cell and light heat reflector, vacuum packaging film is wrapped around the outer periphery of translucent photovoltaic cell and light heat reflector, the vacuum packaging film is a fluorinated polymer film or a polyurethane film.

[0013] The utility model provides a photovoltaic light heat coupling structure, including sequentially pasting arrangement's upper glass, translucent photovoltaic cell, light heat reflector and lower glass, upper glass, translucent photovoltaic cell, light heat reflector and lower glass are bonded fixedly between;

[0014] Or, vacuum packaging film is wrapped around the outer periphery of upper glass, translucent photovoltaic cell, light heat reflector and lower glass, upper glass, translucent photovoltaic cell, light heat reflector and lower glass are fixed through vacuum packaging film close pasting between.

[0015] Wherein, the inner surface of the upper glass is coated with a nanoscale anti-reflection coating, the nanoscale anti-reflection coating is a silicon dioxide coating or a silicon nitride coating; the outer surface of the upper glass and the outer surface of the lower glass are respectively coated with a self-repairing coating.

[0016] Wherein, a first airbag layer is provided between the upper glass and the translucent photovoltaic cell, and a second airbag layer is provided between the light heat reflector and the lower glass.

[0017] The utility model provides a photovoltaic light heat coupling structure, including high light transmission glass, translucent photovoltaic cell and light heat reflector which set up in sequence, high light transmission glass translucent photovoltaic cell and light heat reflector all are curved surface structure, and the inside of high light transmission glass has coated nanometer antireflection coating,

[0018] High light transmission glass, translucent photovoltaic cell and light heat reflector are fixedly connected between the high light transmission glass, the translucent photovoltaic cell and the light heat reflector;

[0019] Or, the high light transmission glass, the translucent photovoltaic cell and the light heat reflector are wrapped with a vacuum packaging film on the outer periphery, and the high light transmission glass, the translucent photovoltaic cell and the light heat reflector are fixedly connected through the vacuum packaging film.

[0020] The utility model provides a photovoltaic light heat coupling structure, including upper layer glass, intermediate layer glass, inner layer glass, translucent photovoltaic cell, light heat reflector and lower layer glass which set up in sequence on the inner layer glass and the one side of translucent photovoltaic cell coating has prevented the reflection coating, upper layer glass, intermediate layer glass, inner layer glass, translucent photovoltaic cell, light heat reflector and lower layer glass are fixed between the heat pressure, and wherein, upper layer glass is super white toughened glass, intermediate layer glass is fluorinated glass, inner layer glass is high light transmission glass, and lower layer glass is super white toughened glass.

[0021] The utility model provides a photovoltaic light heat coupling structure, including translucent photovoltaic cell and light heat reflector, and the mutual adhesion of translucent photovoltaic cell and light heat reflector forms photovoltaic light heat component, and the close connection of translucent photovoltaic cell and light heat reflector is fixed through buckle;

[0022] The buckle is arranged at the four corner positions of the photovoltaic light heat component, and / or the buckle is arranged at the four side positions of the photovoltaic light heat component.

[0023] The photovoltaic light heat coupling structure provided by the utility model includes translucent photovoltaic cell and light heat reflector, and the translucent photovoltaic cell and the light heat reflector are fixedly connected through the adhesive layer, or the translucent photovoltaic cell and the light heat reflector are fixedly connected through the vacuum packaging film, or the translucent photovoltaic cell and the light heat reflector are fixedly connected through the glass compression, or the translucent photovoltaic cell and the light heat reflector are fixedly connected through the buckle. The photovoltaic light heat coupling structure provided by the utility model can effectively enhance the structural stability and environmental adaptability, and can be applied to the tower type light heat power station, the trough type light heat power station, the Fresnel type light heat power station, the disc type light heat power station and other light heat power stations. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0025] Figures 1 to 12 The figure is a cross-sectional view of the photovoltaic-photothermal coupling structure in the embodiments of the present application.

[0026] Explanation of reference signs:

[0027] 1, semi-transparent photovoltaic cell; 2, photothermal reflector; 3, adhesive layer; 31, upper adhesive layer; 32, lower adhesive layer; 4, vacuum packaging film; 5, micron vacuum grid layer; 6, upper glass; 7, lower glass; 8, nanometer anti-reflection coating; 9, self-repairing coating; 10, first air bag layer; 11, second air bag layer; 12, high-transmittance glass; 13, middle glass layer; 14, inner glass; 15, buckle. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. Indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] As shown in Figure 1 and Figure 2 The photovoltaic-photothermal coupling structure of the embodiment of the present application includes a semi-transparent photovoltaic cell 1 and a photothermal reflector 2, and the semi-transparent photovoltaic cell 1 and the photothermal reflector 2 are fixed by a glue layer.

[0032] As shown in Figure 1 A glue layer 3 can be arranged between the semi-transparent photovoltaic cell 1 and the photothermal reflector 2, and according to actual use requirements, the glue layer 3 can adopt a UV-cured transparent silicone layer, a hot melt EVA glue layer or an epoxy resin glue layer.

[0033] Specifically, the above-mentioned glue layer 3 can be composed of a glue point array, and the thickness of the glue point array is 10 microns to 2 centimeters. This structure can minimize the pasting area, reduce the shielding of light transmission, and improve the light transmittance.

[0034] The glue point array can adopt a standard grid glue point array of 2x2 to 30x30, and the diameter of each glue point is 1 to 10 centimeters. The glue point spacing can be optimized according to the size of the semi-transparent photovoltaic cell 1 and the light transmission angle to ensure the maximum light transmission area, which is suitable for photothermal reflectors with high light transmission requirements and reduces the light shielding rate.

[0035] Alternatively, the glue point array can also adopt a gradually changing density glue point array, in which the density of the glue points gradually decreases from the center of the semi-transparent photovoltaic cell 1 to the periphery. The diameter of the glue points is about 1 millimeter in the center area, and gradually decreases to 0.5 millimeter towards the periphery, forming a transition effect. It is suitable for photovoltaic-photothermal coupling structures that require higher light transmittance in the edge area of the photovoltaic cell, and avoids light attenuation at the edge.

[0036] Alternatively, the array of glue dots can also adopt a random distribution of glue dots, that is, according to the actual light distribution of the semi-transparent photovoltaic cell, irregular dot array distribution is formed between the semi-transparent photovoltaic cell 1 and the light-heat reflector 2, and the size and spacing of the glue dots can be diversified to reduce overall light shielding and optimize light scattering effect, which is suitable for light-heat reflectors with complex curved surfaces.

[0037] Specifically, the above-mentioned one layer of glue layer 3 can also be composed of an array of glue lines. This structure can maximize the reduction of light shielding of the semi-transparent photovoltaic cell 1 while increasing the adhesion. The arrangement of the glue lines not only ensures stable adhesion effect, but also ensures light transmission performance, thereby enhancing the stability and durability of the semi-transparent photovoltaic cell 1 on the light-heat reflector 2.

[0038] The array of glue lines can adopt a parallel array of glue lines arranged in parallel, each glue line having a width of 0.5mm to 30cm and a thickness of 10 microns to 2cm. The spacing between the glue lines is about 5-10mm to minimize light shielding and achieve stable adhesion, which is suitable for systems with large photovoltaic cell areas that require enhanced adhesion strength to avoid displacement or peeling under temperature changes.

[0039] Alternatively, the array of glue lines can also adopt a cross grid array of glue lines formed by a plurality of longitudinal and transverse intersecting glue lines, each glue line having a width of 0.5mm to 30cm and a thickness of 10 microns to 2cm. The grid spacing is about 5-10mm, which can provide more uniform adhesion distribution and increase wind pressure resistance and shock resistance, and is suitable for applications that require enhanced structural stability, such as light-heat power stations in high wind or vibration environments.

[0040] Alternatively, the array of glue lines can also adopt a variable density array of glue lines with gradually decreasing glue line density from the center of the semi-transparent photovoltaic cell 1 to the outside. The spacing between the glue lines at the center is 5mm, and the spacing between the glue lines at the edge increases to 10mm, which can maximize the transmittance of light in the edge area and maintain the adhesion strength of the center part, and is suitable for systems that require high edge light transmittance, effectively improving the efficiency of the light-heat system.

[0041] Specifically, the above-mentioned one layer of glue layer 3 can adopt a face type glue layer that completely covers or half covers the semi-transparent photovoltaic cell 1 and the light-heat reflector 2. This structure can achieve complete coverage or half coverage of the glue layer on the semi-transparent photovoltaic cell 1 to enhance the adhesion and stability between the semi-transparent photovoltaic cell 1 and the light-heat reflector 2. It can achieve uniform adhesion effect while maintaining high light transmittance, and is suitable for large-area photovoltaic cells and complex external environments, which helps to improve the durability and reliability of the overall structure.

[0042] The face type adhesive layer can adopt a single layer of face adhesive with uniform thickness, and the thickness of the single layer of face adhesive is 10 microns to 2 centimeters, so as to ensure the bonding strength while reducing the reflection loss and absorption loss of light, and the face type adhesive layer is suitable for seamless bonding of the semi-transparent photovoltaic cell 1 and the light-heat reflector 2, and ensures that the photovoltaic cell does not fall off in a strong wind or vibration environment.

[0043] Alternatively, the face type adhesive layer can also adopt a gradually changing thickness adhesive layer, and the thickness of the gradually changing thickness adhesive layer gradually decreases from the center to the edge of the semi-transparent photovoltaic cell 1, and the center thickness of the gradually changing thickness adhesive layer is about 100 microns, and the edge thickness is reduced to 50 microns. The gradually changing thickness adhesive layer structure can reduce the light shielding of the edge area, optimize the optical performance of the semi-transparent photovoltaic cell 1, and is suitable for photovoltaic cell applications that require higher edge light transmittance, such as photovoltaic-thermal integrated systems, to improve the overall photoelectric conversion efficiency of the integrated system.

[0044] As shown in Figure 2 A double-layer adhesive layer can be provided between the semi-transparent photovoltaic cell 1 and the light-heat reflector 2, and the double-layer adhesive layer includes an upper adhesive layer 31 and a lower adhesive layer 32 that are bonded to each other, the upper adhesive layer 31 is bonded to the semi-transparent photovoltaic cell 1, and the upper adhesive layer 31 can adopt a UV-cured transparent silicone adhesive layer, and the thickness of the upper adhesive layer 31 is 50-80 microns, which is used to improve the light transmittance and anti-aging property. The lower adhesive layer 32 is bonded to the light-heat reflector 2, and the lower adhesive layer 32 can adopt a hot melt type EVA adhesive layer, and the thickness of the lower adhesive layer 32 is 100-200 microns, which is used to provide flexibility and temperature resistance. The structure of the double-layer adhesive layer is suitable for applications of the semi-transparent photovoltaic cell 1 that need to be exposed to high temperature and high ultraviolet light for a long time, and can effectively prolong the service life.

[0045] The photovoltaic-thermal coupling structure in the above embodiments realizes reliable bonding and fixation between the semi-transparent photovoltaic cell 1 and the light-heat reflector 2 through the adhesive layer, not only avoids the complexity of mechanical processing, but also significantly improves the flexibility and stability of the bonding interface. The material of the adhesive layer has excellent weather resistance and anti-aging property, so that the photovoltaic-thermal coupling structure still maintains high and stable bonding strength under long-term ultraviolet radiation, humid heat environment and temperature change conditions. At the same time, the lightweight feature of the photovoltaic-thermal coupling structure is particularly suitable for application scenarios that require low cost and rapid deployment, such as distributed energy systems and remote photovoltaic-thermal power supply projects, providing more efficient and economical solutions for the industry.

[0046] The photovoltaic-thermal coupling structure in the above embodiments can be applied to tower type, trough type, Fresnel type, and dish type solar thermal power stations, and is particularly suitable for lightweight, convenient installation, and photovoltaic-thermal coupling without complex equipment, and is also suitable for application scenarios with small temperature difference and environment temperature not exceeding the moderate range.

[0047] As Figures 3 to 5 shown, the photovoltaic-photothermal coupling structure of the embodiment of the utility model, including mutually pasting arrangement's translucent photovoltaic cell 1 and photothermal reflector 2, be equipped with vacuum packaging film 4 in the outside of translucent photovoltaic cell 1 and photothermal reflector 2, and translucent photovoltaic cell 1 is fixed with photothermal reflector 2 through vacuum packaging film 4 close pasting.

[0048] As Figure 3 shown, vacuum packaging film 4 is the heat shrinkage film that completely wraps in the outside of translucent photovoltaic cell 1 and photothermal reflector 2, and the heat shrinkage film is fluorinated polymer film or polyurethane film.

[0049] When assembling, need to carry out vacuum sealing package through the heat shrinkage film to the whole of the translucent photovoltaic cell 1 and photothermal reflector 2 that are placed in alignment. Wherein, through the air gap between the surface of translucent photovoltaic cell 1 and photothermal reflector 2 can be effectively eliminated by vacuumizing, thereby improving the transmission efficiency of optics and thermotics, can also avoid the long-term corrosion of oxidizing matter in air to the component. Through the heat shrinkage adhesion of heat shrinkage film, can make translucent photovoltaic cell 1 and photothermal reflector 2 surface close pasting, form the structure of high stability. Wherein, the thickness of heat shrinkage film should need to give consideration to the flexibility and protective property of material, ensure that there is no breakage or the problem of sealing performance decline in the processing process.

[0050] Or, as Figure 4 shown, vacuum packaging film 4 is the heat shrinkage film that wraps in the outer periphery of translucent photovoltaic cell 1 and photothermal reflector 2, and the heat shrinkage film is polyvinyl butyral film or polyester heat shrinkage film.

[0051] When assembling, need to carry out vacuum sealing package through the heat shrinkage film to the outer periphery of the translucent photovoltaic cell 1 and photothermal reflector 2 that are placed in alignment, the edge of heat shrinkage film and the outer periphery between translucent photovoltaic cell 1, photothermal reflector 2 can be bonded, through the surface air gap between translucent photovoltaic cell 1 and photothermal reflector 2 can be eliminated by vacuumizing, reduce the energy loss caused by light scattering and reflection, thereby improving the coupling efficiency of optics and thermotics, and through the close pasting fixed between translucent photovoltaic cell 1 and photothermal reflector 2 by heat pressing process, improve the structural stability. Wherein, heat shrinkage film not only has excellent mechanical strength and flexibility, also has the characteristics such as ultraviolet resistance, moisture resistance, corrosion resistance, can work stably in the long term in the outdoor harsh environment.

[0052] Or, as Figure 5As shown, the vacuum encapsulation film 4 is a flexible airbag completely wrapped outside the semi-transparent photovoltaic cell 1 and the light-heat reflector 2, which is a flexible polyimide airbag or a polyvinyl butyral airbag. Among them, the light-heat reflector 2 adopts a curved surface structure, and the semi-transparent photovoltaic cell 1 adopts a flexible structure, so as to ensure that the semi-transparent photovoltaic cell 1 is completely attached to the light-heat reflector 2.

[0053] In order to reduce the interface gap, a layer of thin film interface material such as transparent heat-conducting silicone or low-viscosity polymer resin can be applied to the back of the semi-transparent photovoltaic cell 1 (i.e. the side attached to the light-heat reflector 2), which is used to fill the tiny gaps and further optimize the heat conduction performance and optical contact.

[0054] In assembly, the aligned semi-transparent photovoltaic cell 1 and light-heat reflector 2 are placed inside the flexible airbag, and then the flexible airbag is vacuumed, so that the flexible airbag gradually shrinks under the action of internal negative pressure and tightly wraps the outside of the semi-transparent photovoltaic cell 1 and the light-heat reflector 2. By vacuuming, not only the air layer between the photovoltaic cell and the reflector is eliminated, but also the tight attachment of the assembly on the interface is ensured by the uniform pressure distribution of the airbag, thereby reducing the optical reflection loss and optimizing the energy transfer efficiency. The flexible airbag can effectively buffer the stress caused by thermal expansion and contraction, and is particularly suitable for applications in curved surface structures or complex environments with large temperature changes.

[0055] Among them, the flexible airbag is made of transparent high molecular material, such as polyimide (PI) or polyvinyl butyral (PVB), which has excellent high temperature resistance and ultraviolet resistance to ensure long-term stable operation in harsh outdoor environments. The thickness of the flexible airbag is set to 10-30 microns to achieve high light transmittance and low light absorption loss, while having sufficient mechanical strength to withstand vacuum negative pressure.

[0056] As shown in the drawings, Figure 6 As shown in the drawings, the photovoltaic-thermal coupling structure of the embodiment of the utility model, including semi-transparent photovoltaic cell 1 and light-heat reflector 2, between semi-transparent photovoltaic cell 1 and light-heat reflector 2, there is micron vacuum grid layer 5, the outer periphery of semi-transparent photovoltaic cell 1 and light-heat reflector 2 is wrapped with vacuum encapsulation film 4, and the vacuum encapsulation film 4 is fluorinated polymer film or polyurethane film.

[0057] Among them, the micron vacuum grid layer 5 is made of high-performance nano-porous material, such as silicon dioxide film or aluminum oxide film, which has a regular microporous structure with a pore size of 0.1-5 microns and a thickness of 10-100 microns. The structure of the micron vacuum grid layer 5 not only ensures high light transmittance and low thermal conductivity, but also effectively reduces light scattering and heat loss, and improves the overall efficiency of the photovoltaic-thermal coupling structure.

[0058] In assembly, the micron-sized vacuum grid layer 5 is bonded between the semi-transparent photovoltaic cell 1 and the light-heat reflector 2, and the three are bonded to each other, and the bonding material is selected from high-temperature curing glue, which can withstand long-term high temperature and strong ultraviolet radiation, while having excellent bonding strength. Then, the semi-transparent photovoltaic cell 1 and the light-heat reflector 2 are sealed at the outer periphery by a vacuum packaging film 4, which can be a fluorinated polymer film or a polyurethane film. The vacuum packaging film 4 has excellent high-temperature resistance, ultraviolet resistance, and moisture resistance, while having good flexibility and light transmission, which helps to seal the micron-sized vacuum grid layer 5 and prevent the infiltration of external gas or moisture, thereby maintaining the long-term stability of the vacuum environment. After sealing is completed, the micron-sized vacuum grid layer 5 is subjected to vacuum pumping, so that the micron-sized vacuum grid layer 5 is in a high negative pressure state, thereby minimizing the air barrier effect between the semi-transparent photovoltaic cell 1 and the light-heat reflector 2, and ensuring close fitting between the two.

[0059] The photovoltaic-thermal coupling structure in the above embodiment realizes high-strength bonding and perfect sealing performance by forming a vacuum between the semi-transparent photovoltaic cell 1 and the light-heat reflector 2 and applying a compaction force. This photovoltaic-thermal coupling structure effectively avoids the influence of thermal expansion and gas penetration on the coupling interface, ensuring the reliability and durability of the structure in a high-temperature and high-pressure environment. In addition, the vacuum compaction structure between the semi-transparent photovoltaic cell 1 and the light-heat reflector 2 also reduces heat conduction loss, further improving the thermal energy collection efficiency of the light-heat reflector, and is particularly suitable for high-demand scenarios such as centralized solar power stations and industrial heat supply, providing a strong guarantee for improving the reliability and economy of energy systems.

[0060] The photovoltaic-thermal coupling structure in the above embodiment can be applied to tower-type, trough-type, Fresnel-type, and dish-type solar thermal power stations, and is also suitable for high-efficiency concentrated photovoltaic-thermal integrated systems that require high sealing and stability, and is particularly suitable for applications that require low heat loss.

[0061] As shown in Figure 7 The photovoltaic-thermal coupling structure of the embodiment of the utility model, including upper glass 6, semi-transparent photovoltaic cell 1, light-heat reflector 2 and lower glass 7 that are sequentially attached, upper glass 6, semi-transparent photovoltaic cell 1, light-heat reflector 2 and lower glass 7 are bonded and fixed. In assembly, the overall structural stability of the photovoltaic-thermal coupling structure can be improved by compression molding process. Wherein, upper glass 6 and lower glass 7 are both high-transmittance glass. By clamping and fixing semi-transparent photovoltaic cell 1 and light-heat reflector 2 between upper glass 6 and lower glass 7, the two layers of high-transmittance glass can serve as protective layers for the photovoltaic-thermal coupling structure.

[0062] As shown in Figure 8As shown, a nanoscale anti-reflection coating 8 can be coated on the inner surface of the upper glass 6 (the side in contact with the semi-transparent photovoltaic cell 1), which is a silicon dioxide coating or a silicon nitride coating, with a thickness of 100-200 nanometers, and has excellent anti-reflection properties. By providing the nanoscale anti-reflection coating 8, the light transmittance can be improved and the reflection loss can be reduced.

[0063] As shown, a nanoscale anti-reflection coating 8 can be coated on the inner surface of the upper glass 6 (the side in contact with the semi-transparent photovoltaic cell 1), which is a silicon dioxide coating or a silicon nitride coating, with a thickness of 100-200 nanometers, and has excellent anti-reflection properties. By providing the nanoscale anti-reflection coating 8, the light transmittance can be improved and the reflection loss can be reduced. Figure 8 As shown, a nanoscale anti-reflection coating 8 can be coated on the inner surface of the upper glass 6 (the side in contact with the semi-transparent photovoltaic cell 1), which is a silicon dioxide coating or a silicon nitride coating, with a thickness of 100-200 nanometers, and has excellent anti-reflection properties. By providing the nanoscale anti-reflection coating 8, the light transmittance can be improved and the reflection loss can be reduced.

[0064] As shown, a nanoscale anti-reflection coating 8 can be coated on the inner surface of the upper glass 6 (the side in contact with the semi-transparent photovoltaic cell 1), which is a silicon dioxide coating or a silicon nitride coating, with a thickness of 100-200 nanometers, and has excellent anti-reflection properties. By providing the nanoscale anti-reflection coating 8, the light transmittance can be improved and the reflection loss can be reduced. Figure 8 As shown, a nanoscale anti-reflection coating 8 can be coated on the inner surface of the upper glass 6 (the side in contact with the semi-transparent photovoltaic cell 1), which is a silicon dioxide coating or a silicon nitride coating, with a thickness of 100-200 nanometers, and has excellent anti-reflection properties. By providing the nanoscale anti-reflection coating 8, the light transmittance can be improved and the reflection loss can be reduced.

[0065] As shown, a nanoscale anti-reflection coating 8 can be coated on the inner surface of the upper glass 6 (the side in contact with the semi-transparent photovoltaic cell 1), which is a silicon dioxide coating or a silicon nitride coating, with a thickness of 100-200 nanometers, and has excellent anti-reflection properties. By providing the nanoscale anti-reflection coating 8, the light transmittance can be improved and the reflection loss can be reduced. Figure 9 As shown, a nanoscale anti-reflection coating 8 can be coated on the inner surface of the upper glass 6 (the side in contact with the semi-transparent photovoltaic cell 1), which is a silicon dioxide coating or a silicon nitride coating, with a thickness of 100-200 nanometers, and has excellent anti-reflection properties. By providing the nanoscale anti-reflection coating 8, the light transmittance can be improved and the reflection loss can be reduced.

[0066] As shown, a nanoscale anti-reflection coating 8 can be coated on the inner surface of the upper glass 6 (the side in contact with the semi-transparent photovoltaic cell 1), which is a silicon dioxide coating or a silicon nitride coating, with a thickness of 100-200 nanometers, and has excellent anti-reflection properties. By providing the nanoscale anti-reflection coating 8, the light transmittance can be improved and the reflection loss can be reduced.

[0067] As Figure 10 The utility model provides a photovoltaic -thermal coupling structure, including high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 that set up in proper order are pasted, high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 are all curved surface structure. The high light transmission glass 12 adopts low -iron ultra -white toughened glass or fluorinated glass, the thickness of the high light transmission glass 12 is controlled between 1 ~ 2 millimeters. The inside of the high light transmission glass 12 is also coated with the nanometer anti -reflection coating 8.

[0068] Wherein, high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 can be bonded fixed. The outer periphery of high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 can be wrapped with the vacuum packaging film 4, to make high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 through vacuum packaging film 4 closely fixed.

[0069] Since high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 all adopt curved surface structure form, thus be applicable to the flexible photovoltaic module in the trough type or dish type light heat system, avoid the limitation of traditional rigid glass, ensure the overall optical effect.

[0070] As Figure 11 The utility model discloses a photovoltaic -thermal coupling structure, including high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 that set up in proper order are pasted, high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 are all curved surface structure. The high light transmission glass 12 adopts low -iron ultra -white toughened glass or fluorinated glass, the thickness of the high light transmission glass 12 is controlled between 1 ~ 2 millimeters. The inside of the high light transmission glass 12 is also coated with the nanometer anti -reflection coating 8.

[0071] The utility model discloses a photovoltaic -thermal coupling structure, including high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 that set up in proper order are pasted, high light transmission glass 12, semi -transparent photovoltaic cell 1 and light heat reflector 2 are all curved surface structure. The high light transmission glass 12 adopts low -iron ultra -white toughened glass or fluorinated glass, the thickness of the high light transmission glass 12 is controlled between 1 ~ 2 millimeters. The inside of the high light transmission glass 12 is also coated with the nanometer anti -reflection coating 8.

[0072] The photovoltaic-photothermal coupling structure in the above embodiment adopts a high-transmittance glass structure to firmly combine the semi-transparent photovoltaic cell 1 and the photothermal reflector 2 together, thereby forming an integrated high-sealing structure. The high transmittance and excellent mechanical strength of the glass not only ensure the photoelectric conversion efficiency of the semi-transparent photovoltaic cell 1, but also enhance the impact resistance and aging resistance of the coupling structure, which is particularly suitable for large-scale photovoltaic-photothermal power stations that need to operate stably for a long time and harsh climate environments, such as deserts, plateaus and coastal areas, thereby laying a solid foundation for the development of photovoltaic-photothermal technology in extreme application scenarios.

[0073] The photovoltaic-photothermal coupling structure of the above embodiment can be applied to tower-type photothermal power stations, trough-type photothermal power stations, Fresnel-type photothermal power stations, dish-type photothermal power stations and the like. The glass compression photovoltaic-photothermal coupling structure is suitable for photovoltaic-photothermal integrated systems with high requirements for durability and climate change resistance, such as high-efficiency solar thermal power generation systems, large-scale photothermal power generation systems, building integrated photovoltaics (BIPV) and the like, and is also suitable for application occasions that are subjected to environmental factors such as wind, rain and ultraviolet light for a long time.

[0074] As shown in Figure 12 The photovoltaic-photothermal coupling structure of the embodiment of the utility model, including semi-transparent photovoltaic cell 1 and photothermal reflector 2, semi-transparent photovoltaic cell 1 and photothermal reflector 2 mutually adhere and form photovoltaic-photothermal assembly between them, and semi-transparent photovoltaic cell 1 and photothermal reflector 2 are fixedly connected by buckle 15.

[0075] According to actual use demand, can set up buckle 15 respectively at the position of four corners of photovoltaic-photothermal assembly, the locking function of buckle 15 can ensure the close adhesion between semi-transparent photovoltaic cell 1 and photothermal reflector 2, prevent the structure from loosening or failing due to external force. The material used for buckle 15 needs to have high strength and weather resistance, usually selects polyimide (PI) or polycarbonate (PC) and the like material with excellent temperature resistance, ultraviolet resistance, to ensure that it is not affected by bad weather in the outdoor environment for a long time.

[0076] Buckle 15 can also be respectively arranged at the positions of four sides of the photovoltaic-photothermal assembly, and the buckles 15 are arranged at equal intervals, so as to stably fix the semi-transparent photovoltaic cell 1 on the surface of the photothermal reflector 2 through the locking function of the buckles 15. This structure is suitable for photovoltaic cells and reflectors of larger size or irregular shape, and can provide more uniform stress distribution and reduce the deformation or stress concentration problem of the photovoltaic-photothermal assembly due to thermal expansion and contraction. The spacing of the buckles 15 can be adjusted according to actual use requirements, further improving the adaptability and reliability of the coupling structure, and the selected material is mainly high-strength weather-resistant material, ensuring long-term stability in different environments.

[0077] The buckles 15 are arranged at the four corners and the four edges of the photovoltaic-photothermal assembly, and are arranged at equal intervals between each other, so that the close fitting and fixing between the semi-transparent photovoltaic cell 1 and the photothermal reflector 2 is realized through the locking function of the buckles 15. This structure greatly improves the connection stability between the semi-transparent photovoltaic cell and the photothermal reflector, reduces the deformation or stress concentration problem of the photovoltaic cell due to thermal expansion and cold contraction, and prevents structural loosening or failure caused by external force.

[0078] Specifically, the buckle can be selected according to actual needs, such as a threaded locking buckle, an elastic locking buckle, a suction cup buckle, and a buckle with a self-locking function, and the like. Therefore, the specific structure of the buckle will not be described in detail, and the corresponding buckle can be selected according to actual use requirements.

[0079] The embodiment realizes the quick and convenient fixing between the semi-transparent photovoltaic cell 1 and the photothermal reflector 2 through the buckle. This structure can be installed and disassembled without complex tools, significantly reduces the system deployment and maintenance cost, and provides the possibility of modular expansion. In the emergency energy supply, mobile energy station and quick installation project, the photovoltaic-photothermal coupling structure shows excellent adaptability and efficiency, and provides new technical support for the popularization of photovoltaic-photothermal technology in diversified application scenarios.

[0080] The photovoltaic-photothermal coupling structure of the embodiment of the utility model can be applied to tower type photothermal power stations, trough type photothermal power stations, Fresnel type photothermal power stations, disc type photothermal power stations and the like. The buckle type photovoltaic-photothermal coupling structure is suitable for photovoltaic-photothermal coupling systems that need to be regularly disassembled, replaced and maintained, and is also suitable for photovoltaic-photothermal systems designed in a modular manner, especially photovoltaic-photothermal systems that need to be freely combined and expanded.

[0081] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A photovoltaic photothermal coupling structure, characterized in that, It includes a semi-transparent photovoltaic cell and a photothermal reflector, wherein the semi-transparent photovoltaic cell and the photothermal reflector are bonded and fixed together by an adhesive layer; An adhesive layer is provided between the semi-transparent photovoltaic cell and the photothermal reflector. The adhesive layer is a UV-curable transparent silicone layer, a hot-melt EVA adhesive layer, or an epoxy resin adhesive layer. Alternatively, a double adhesive layer may be provided between the semi-transparent photovoltaic cell and the photothermal reflector. The double adhesive layer includes an upper adhesive layer and a lower adhesive layer that are bonded to each other. The upper adhesive layer is bonded to the semi-transparent photovoltaic cell and is a UV-curable transparent silicone layer. The lower adhesive layer is bonded to the photothermal reflector and is a hot-melt EVA adhesive layer.

2. A photovoltaic photothermal coupling structure, characterized in that, It includes a semi-transparent photovoltaic cell and a photothermal reflector that are attached to each other. A vacuum sealing film is provided on the outside of the semi-transparent photovoltaic cell and the photothermal reflector. The semi-transparent photovoltaic cell and the photothermal reflector are tightly attached and fixed to each other by the vacuum sealing film.

3. The photovoltaic photothermal coupling structure according to claim 2, characterized in that, The vacuum encapsulation film is a heat-shrinkable film that completely wraps the outside of the semi-transparent photovoltaic cell and the photothermal reflector. The heat-shrinkable film is a fluoropolymer film or a polyurethane film. Alternatively, the vacuum sealing film is a heat-shrinkable film wrapped around the outer periphery of the semi-transparent photovoltaic cell and the photothermal reflector, and the heat-shrinkable film is a polyvinyl butyral film or a polyester heat-shrinkable film. Alternatively, the vacuum sealing film may be a flexible airbag that completely encloses the semi-transparent photovoltaic cell and the photothermal reflector, wherein the flexible airbag is a polyimide airbag or a polyvinyl butyral airbag.

4. A photovoltaic photothermal coupling structure, characterized in that, It includes a semi-transparent photovoltaic cell and a photothermal reflector. A micron-level vacuum grid layer is bonded between the semi-transparent photovoltaic cell and the photothermal reflector. A vacuum encapsulation film is wrapped around the outer periphery of the semi-transparent photovoltaic cell and the photothermal reflector. The vacuum encapsulation film is a fluoropolymer film or a polyurethane film.

5. A photovoltaic photothermal coupling structure, characterized in that, It includes an upper glass layer, a semi-transparent photovoltaic cell, a photothermal reflector, and a lower glass layer that are sequentially bonded together, and the upper glass layer, the semi-transparent photovoltaic cell, the photothermal reflector, and the lower glass layer are bonded and fixed together; Alternatively, a vacuum sealing film may be wrapped around the outer periphery of the upper glass, the semi-transparent photovoltaic cell, the photothermal reflector, and the lower glass, and the upper glass, the semi-transparent photovoltaic cell, the photothermal reflector, and the lower glass may be tightly bonded and fixed together by the vacuum sealing film.

6. The photovoltaic photothermal coupling structure according to claim 5, characterized in that, A nanoscale anti-reflective coating is coated on the inner surface of the upper glass layer, which is a silicon dioxide coating or a silicon nitride coating; a self-healing coating is coated on the outer surface of the upper glass layer and the outer surface of the lower glass layer respectively.

7. The photovoltaic photothermal coupling structure according to claim 5, characterized in that, A first airbag layer is provided between the upper glass and the semi-transparent photovoltaic cell, and a second airbag layer is provided between the photothermal reflector and the lower glass.

8. A photovoltaic photothermal coupling structure, characterized in that, The device includes a high-transmittance glass, a semi-transparent photovoltaic cell, and a photothermal reflector that are sequentially bonded together. The high-transmittance glass, the semi-transparent photovoltaic cell, and the photothermal reflector are all curved structures. A nano-level anti-reflective coating is applied to the inner side of the high-transmittance glass. The high-transmittance glass, the semi-transparent photovoltaic cell, and the photothermal reflector are bonded and fixed together; Alternatively, a vacuum sealing film may be wrapped around the outer periphery of the high-transmittance glass, the semi-transparent photovoltaic cell, and the photothermal reflector, and the high-transmittance glass, the semi-transparent photovoltaic cell, and the photothermal reflector may be tightly bonded and fixed together by the vacuum sealing film.

9. A photovoltaic photothermal coupling structure, characterized in that, The device comprises an upper glass layer, a middle glass layer, an inner glass layer, a semi-transparent photovoltaic cell, a photothermal reflector, and a lower glass layer, which are sequentially bonded together. An anti-reflective coating is applied to the inner glass layer on the side that is bonded to the semi-transparent photovoltaic cell. The upper glass layer, the middle glass layer, the inner glass layer, the semi-transparent photovoltaic cell, the photothermal reflector, and the lower glass layer are fixed together by hot pressing. The upper glass layer is ultra-clear tempered glass, the middle glass layer is fluorinated glass, the inner glass layer is high-transmittance glass, and the lower glass layer is ultra-clear tempered glass.

10. A photovoltaic photothermal coupling structure, characterized in that, It includes a semi-transparent photovoltaic cell and a photothermal reflector, wherein the semi-transparent photovoltaic cell and the photothermal reflector are bonded together to form a photovoltaic photothermal module, and the semi-transparent photovoltaic cell and the photothermal reflector are tightly connected and fixed by a snap-fit. The buckles are respectively disposed at the four corners of the photovoltaic thermal module, and / or the buckles are respectively disposed at the four sides of the photovoltaic thermal module.

Images