Glass assembly and photovoltaic device

Abstract

The utility model provides a glass assembly and a photovoltaic device. The glass assembly comprises a glass substrate; the heat reflecting layer is arranged on the light receiving side of the glass substrate, and the heat reflecting layer can reflect infrared light and transmit visible light; wherein the heat reflecting layer comprises a silver film layer, a copper film layer or a titanium film layer.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, in particular to a glass component and a photovoltaic equipment. Background Art

[0002] At present, with the rapid development of the photovoltaic industry, photovoltaic equipment is being promoted and used on household and commercial roofs and car roofs. In related technologies, the temperature coefficient of solar cells is generally negative, and the peak power temperature coefficient of photovoltaic equipment is approximately between -0.29% / ℃ and -0.42% / ℃. Specifically, solar cells absorb light in the infrared spectrum, and as the temperature rises, the power generation efficiency is significantly reduced. And as the sunlight exposure time increases, the surface temperature of the photovoltaic equipment increases, which will accelerate the attenuation and aging of the photovoltaic equipment and reduce the service life of the photovoltaic equipment. Utility Model Content

[0003] The embodiments of the utility model are intended to solve at least one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of an embodiment of the utility model provides a glass assembly.

[0005] A second aspect of the embodiments of the present utility model provides a photovoltaic device.

[0006] In view of this, according to the first aspect of an embodiment of the utility model, a glass assembly is provided, the glass assembly comprising: a glass substrate; a heat reflection layer, arranged on the light-receiving side of the glass substrate, the heat reflection layer can reflect infrared light and transmit visible light; wherein the heat reflection layer comprises a silver film layer, a copper film layer or a titanium film layer.

[0007] The glass assembly provided by the embodiment of the utility model includes a glass substrate and a heat reflection layer. Specifically, the heat reflection layer is arranged on the light receiving side of the glass substrate, and the heat reflection layer can reflect infrared light and transmit visible light. In other words, by arranging the heat reflection layer on the light receiving side of the glass substrate, when light irradiates the heat reflection layer, the infrared light can be reflected.

[0008] It is understandable that the spectrum of solar radiation to the earth's surface is mainly: ultraviolet region, wavelength 280nm-380nm, accounting for about 5%; visible light region, wavelength 380nm-780nm, accounting for about 50%; near infrared region, wavelength 780nm-2500nm, accounting for about 43%. Among them, the ultraviolet region has the least heat, followed by the visible light region, and the near infrared region has a higher heat.

[0009] Since a heat reflective layer capable of reflecting infrared light is provided on the light-receiving side of the glass substrate, the glass component has a higher reflectivity to infrared light, thereby being able to reduce the surface temperature of the photovoltaic device having the glass component under light, thereby improving the power generation efficiency of the photovoltaic device and increasing the amount of power generated.

[0010] Moreover, it is understandable that as the sunlight exposure time increases, the surface temperature of the photovoltaic device may exceed 70°C, and every 10°C increase in temperature will cause the attenuation and aging rate of the photovoltaic device to double.

[0011] Since the surface temperature of photovoltaic equipment under light is reduced, it is also beneficial to slow down the attenuation and aging rate of photovoltaic equipment and extend the service life of photovoltaic equipment.

[0012] At the same time, the heat reflective layer can also transmit visible light, so that the glass component has a higher transmittance to visible light, that is, it has a lower reflectivity to visible light, thereby ensuring that the photovoltaic device with the glass component can convert light energy into electrical energy while reducing the surface temperature of the photovoltaic device under light.

[0013] The heat reflection layer includes an Ag film layer, a Cu film layer or a Ti film layer. It is understood that the Ag film layer, the Cu film layer or the Ti film layer has a high reflectivity to infrared light and a high transmittance to visible light, thereby increasing the reflectivity of the glass component to infrared light and the transmittance to visible light. This reduces the surface temperature of the photovoltaic device with the glass component under light and improves the power generation efficiency of the photovoltaic device. It is also beneficial to slow down the decay and aging speed of the photovoltaic device and extend the service life of the photovoltaic device.

[0014] In addition, it can be understood that the Ag film layer and the Cu film layer have colors, so that the glass component presents a variety of color effects, improving the color richness and three-dimensional effect of the photovoltaic device having the glass component.

[0015] It is worth mentioning that the Ag film layer, the Cu film layer and the Ti film layer are all low-emissivity layers.

[0016] Optionally, the glass component is a front sheet of a photovoltaic device.

[0017] Optionally, a magnetron sputtering coating method is used to coat a heat reflective layer on the glass substrate, thereby achieving precise control of the coating thickness of the heat reflective layer.

[0018] Optionally, the glass substrate includes a tempered glass substrate or a semi-tempered glass substrate.

[0019] In addition, the glass assembly provided by the above technical solution of the utility model also has the following additional technical features:

[0020] In some technical solutions, optionally, the thickness d1 of the heat reflective layer satisfies 15nm≤d1≤20nm.

[0021] In this technical solution, the range of the thickness of the heat reflective layer is limited. Specifically, the thickness of the heat reflective layer is between 15nm and 20nm. It is understandable that if the thickness of the heat reflective layer is too thick, that is, d1 is greater than 20nm, the transmittance of visible light will be reduced, affecting the power generation efficiency.

[0022] Correspondingly, if the thickness of the heat reflection layer is too thin, that is, d1 is less than 15 nm, the thickness of the heat reflection layer may be uneven during coating, thereby affecting the heat reflection effect.

[0023] Therefore, by limiting the thickness of the heat reflection layer to between 15nm and 20nm, it is possible to improve the reflectivity of the glass component to infrared light while ensuring the visible light transmittance, thereby reducing the surface temperature of the photovoltaic device under light, improving the power generation efficiency of the photovoltaic device, and extending the service life of the photovoltaic device.

[0024] In some technical solutions, optionally, at least a portion of the glass substrate is configured as a curved glass substrate.

[0025] In this technical solution, at least a portion of the glass substrate is defined as a curved glass substrate. Thus, after the light-receiving side of the curved glass substrate is coated, the glass assembly is formed into a curved glass, and then after the curved glass is combined with the battery assembly, a curved photovoltaic tile is formed, thereby improving the appearance of the photovoltaic device.

[0026] Optionally, the curved glass substrate includes a single-peak curved glass substrate or a multi-peak and multi-trough curved glass substrate.

[0027] In some technical solutions, optionally, a radius R of the curved glass substrate satisfies 30 nm ≤ R ≤ 150 nm; and / or a thickness d2 of the curved glass substrate satisfies 3 mm ≤ d2 ≤ 8 mm.

[0028] In this technical solution, the range of the radius of the curved surface of the curved glass substrate is limited. Specifically, the radius of the curved surface of the curved glass substrate is between 30nm and 150nm. That is, the radius of curvature of the curved glass substrate is between 30nm and 150nm. Thus, while ensuring the appearance of the glass component, the problem of the cell being broken due to excessive deformation when the cell is assembled with the glass component can be avoided. It can also facilitate the processing and manufacturing of the curved glass substrate, reduce the manufacturing difficulty, and improve production efficiency.

[0029] The thickness of the curved glass substrate is between 3 mm and 8 mm, which can facilitate the processing and shaping of the curved glass substrate, prevent the curved glass substrate from being broken due to excessive deformation during the processing, and improve the yield rate.

[0030] In some technical solutions, optionally, the glass assembly further includes an anti-oxidation layer and an absorption layer, wherein the anti-oxidation layer is arranged on a side of the heat reflecting layer close to the glass substrate, and the absorption layer is arranged on a side of the heat reflecting layer away from the glass substrate.

[0031] In this technical solution, it is defined that the glass assembly also includes an anti-oxidation layer and an absorption layer. Specifically, the anti-oxidation layer is arranged on the side of the heat reflecting layer close to the glass substrate, and the absorption layer is arranged on the side of the heat reflecting layer away from the glass substrate. That is to say, the heat reflecting layer is encapsulated between the two optical layer stacks of the anti-oxidation layer and the absorption layer.

[0032] It is understandable that the heat reflective layer generally adopts a low-radiation film layer such as an Ag film layer, a Cu film layer or a Ti film layer. By encapsulating the low-radiation film layer such as an Ag film layer, a Cu film layer or a Ti film layer between the two optical layer stacks of the anti-oxidation layer and the absorption layer, the heat reflective layer is protected, thereby preventing the heat reflective layer from being oxidized and extending the service life of the glass component.

[0033] It is worth noting that low-emissivity film layers such as Ag film layers, Cu film layers or Ti film layers are encapsulated between two optical layer stacks of an anti-oxidation layer and an absorption layer, so that the glass component has a transmittance of more than 75% for visible light, a reflectivity of less than 10% for visible light, and a reflectivity of more than 90% for infrared light, which effectively reduces the surface temperature of the photovoltaic device under light and increases power generation.

[0034] Optionally, the anti-oxidation layer includes a metal oxide film layer, and specifically, the anti-oxidation layer includes a ZnO film layer or an AZO film layer.

[0035] Optionally, the anti-oxidation layer includes a Si3N4 film layer or a SiCrN x Membrane layer.

[0036] Optionally, the absorption layer includes a metal alloy film layer or a metal oxide film layer.

[0037] Optionally, the absorption layer includes a NiCr film layer or a NiCrO x Membrane layer.

[0038] In some technical solutions, optionally, the anti-oxidation layer includes a metal oxide film layer; and / or the absorption layer includes a metal alloy film layer or a metal oxide film layer.

[0039] In this technical solution, the anti-oxidation layer includes a metal oxide film layer, thereby protecting the heat reflective layer and preventing the heat reflective layer from being oxidized. In addition, the metal oxide film layer is relatively cheap and easily available, which is conducive to reducing the production cost of the glass assembly.

[0040] The absorption layer includes a metal alloy film layer or a metal oxide film layer, thereby protecting the heat reflective layer and preventing the heat reflective layer from being oxidized. The metal alloy film layer or the metal oxide film layer can absorb energy, thereby further reducing the surface temperature of the photovoltaic device under light.

[0041] In some technical solutions, optionally, the anti-oxidation layer includes a ZnO film layer or an AZO film layer; and / or the absorption layer includes a NiCr film layer or a NiCrO film layer. x Membrane layer.

[0042] In some technical solutions, optionally, the thickness d3 of the anti-oxidation layer satisfies 15nm≤d3≤30nm; and / or the thickness d4 of the absorption layer satisfies 1nm≤d4≤10nm.

[0043] In this technical solution, the range of the thickness of the anti-oxidation layer is limited. Specifically, the thickness of the anti-oxidation layer is between 15nm and 30nm. It is understandable that if the thickness of the anti-oxidation layer is too thick, that is, d3 is greater than 30nm, the transmittance of visible light will be reduced, affecting the power generation efficiency.

[0044] Correspondingly, if the thickness of the anti-oxidation layer is too thin, that is, d3 is less than 15 nm, the thickness of the anti-oxidation layer may be uneven during coating, which may affect the anti-oxidation effect of the glass component.

[0045] Therefore, by limiting the thickness of the anti-oxidation layer to between 15 nm and 30 nm, it is possible to effectively prevent the heat reflection layer from being oxidized while ensuring the visible light transmittance, thereby further improving the service life of the photovoltaic device having the glass component.

[0046] The thickness of the absorption layer is between 1nm and 10nm, so that it can absorb energy and reduce the surface temperature of the photovoltaic device under light while ensuring the transmittance of visible light, thereby ensuring power generation efficiency.

[0047] In some technical solutions, optionally, the glass assembly further includes a first protective layer and a second protective layer, wherein the first protective layer is disposed between the anti-oxidation layer and the glass substrate, and the second protective layer is disposed on a side of the absorption layer away from the heat reflection layer.

[0048] In this technical solution, it is defined that the glass assembly also includes a first protective layer and a second protective layer. Specifically, the first protective layer is arranged between the anti-oxidation layer and the glass substrate, and the second protective layer is arranged on the side of the absorption layer away from the heat reflection layer. That is to say, on the glass substrate, from the inside to the outside, there are the first protective layer, the anti-oxidation layer, the heat reflection layer, the absorption layer, and the second protective layer.

[0049] By setting the first protective layer, the light-to-heat ratio of the photovoltaic device can be improved, and the density of the heat reflection layer can be improved, and the reflectivity of the glass component to infrared light can be further improved, thereby improving the heat reflection efficiency of the photovoltaic device with the glass component, reducing the surface temperature of the photovoltaic device under light, and improving the power generation efficiency.

[0050] In addition, by arranging a second protective layer on the outermost side, the heat reflection layer and the absorption layer can be protected, thereby ensuring the service life of the glass component with heat reflection effect.

[0051] Optionally, a magnetron sputtering coating method is used to coat the first protective layer, the anti-oxidation layer, the heat reflection layer, the absorption layer and the second protective layer on the light-receiving side of the glass substrate to achieve precise control of the thickness of each film layer.

[0052] Moreover, the glass component with the above-mentioned multiple film layers shows good transparency to visible light, but has high reflectivity to infrared radiation, and the combination of multiple film layers presents a variety of color effects, achieving the effect of being both beautiful and gorgeous, and able to generate electricity and reflect heat, thereby enhancing the richness of color and three-dimensional sense of the photovoltaic equipment with the glass component.

[0053] In some technical solutions, optionally, the first protective layer includes a zinc oxide film layer, a tin oxide film layer or a zinc-tin composite oxide film layer; and / or the second protective layer includes a Si3N4 film layer and / or an AlTiN x Membrane layer.

[0054] In this technical solution, the first protective layer includes a zinc oxide film layer, a tin oxide film layer or a zinc-tin composite oxide film layer, that is, the first protective layer is a zinc-tin metal oxide film layer. It can be understood that the oxide substrate has a significant effect on improving the light-to-heat ratio of the photovoltaic device, and can effectively improve the compactness of the heat reflection layer and improve the heat reflectivity of the photovoltaic device.

[0055] The second protective layer includes a Si3N4 film layer and / or an AlTiN x Membrane layer.

[0056] In some technical solutions, optionally, the thickness d5 of the first protective layer satisfies 20nm≤d5≤30nm; and / or the thickness d6 of the second protective layer satisfies 15nm≤d6≤40nm.

[0057] In this technical solution, the range of the thickness of the first protective layer is limited. Specifically, the thickness of the first protective layer is between 20nm and 30nm. It is understandable that if the thickness of the first protective layer is too thick, that is, d5 is greater than 30nm, the transmittance of visible light will be reduced, affecting the power generation efficiency.

[0058] Accordingly, if the thickness of the first protective layer is too thin, that is, d5 is less than 20 nm, the thickness of the first protective layer may be uneven during coating, which will fail to significantly improve the light-to-heat ratio of the photovoltaic device and affect the thermal reflection effect of the photovoltaic device.

[0059] Therefore, by limiting the thickness of the first protective layer to between 20nm and 30nm, it is possible to ensure the transmittance of visible light while increasing the reflectivity of the glass component to infrared light, thereby reducing the surface temperature of the photovoltaic device under light, improving the power generation efficiency of the photovoltaic device, and extending the service life of the photovoltaic device.

[0060] The thickness of the second protective layer is between 15 nm and 40 mm, so that the heat reflection layer and the absorption layer can be protected while ensuring the visible light transmittance, thereby ensuring the service life of the glass component with heat reflection effect.

[0061] According to a second aspect of the utility model, a photovoltaic device is provided, comprising a glass assembly as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the glass assembly, which will not be repeated here.

[0062] Furthermore, the photovoltaic device also includes a battery assembly, and the battery assembly is arranged on the backlight side of the glass substrate.

[0063] The photovoltaic device provided by the embodiment of the utility model includes a glass component and a battery component. Specifically, the battery component is arranged on the backlight side of the glass substrate, that is, the heat reflection layer and the battery component are respectively located on two opposite sides of the glass substrate.

[0064] Since a heat reflective layer capable of reflecting infrared light is provided on the light-receiving side of the glass substrate, the glass component has a higher reflectivity to infrared light, thereby being able to reduce the surface temperature of the photovoltaic device having the glass component under light, thereby improving the power generation efficiency of the photovoltaic device and increasing the amount of power generated.

[0065] Moreover, since the surface temperature of photovoltaic equipment under light is reduced, it is also beneficial to slow down the attenuation and aging rate of photovoltaic equipment and extend the service life of photovoltaic equipment.

[0066] At the same time, the heat reflective layer can also transmit visible light, so that the glass component has a higher transmittance to visible light, that is, it has a lower reflectivity to visible light, thereby ensuring that the photovoltaic device with the glass component can convert light energy into electrical energy while reducing the surface temperature of the photovoltaic device under light.

[0067] Optionally, the photovoltaic device comprises photovoltaic tiles or photovoltaic panels.

[0068] In addition, the photovoltaic device provided by the above technical solution of the utility model also has the following additional technical features:

[0069] In some technical schemes, optionally, the battery assembly includes a battery cell, a backplane, a first encapsulation layer and a second encapsulation layer, wherein the backplane is located on the side of the battery cell away from the glass assembly, the first encapsulation layer is arranged between the battery cell and the glass assembly, and the second encapsulation layer is arranged between the battery cell and the backplane; wherein the thickness d7 of the first encapsulation layer satisfies 0.3mm≤d7≤0.8mm; and / or the thickness d8 of the second encapsulation layer satisfies 0.3mm≤d8≤0.8mm; and / or the thickness d9 of the backplane satisfies 0.3mm≤d9≤0.7mm.

[0070] In this technical solution, it is defined that the battery assembly includes a battery cell, a backplane, a first encapsulation layer, and a second encapsulation layer. Specifically, along the thickness direction of the photovoltaic device, from top to bottom, it is a glass assembly, a first encapsulation layer, a battery cell, a second encapsulation layer, and a backplane. In other words, the glass assembly is the front plate of the photovoltaic device. This makes the photovoltaic device have a higher reflectivity for infrared light and a higher transmittance for visible light, reduces the surface temperature of the photovoltaic device under light, improves power generation efficiency and power generation, and extends the service life of the photovoltaic device.

[0071] It is understandable that the light-receiving side of the cell is protected by the glass component, and the backlight side of the cell is protected by the back plate. The first encapsulation layer and the second encapsulation layer realize the bonding of the glass component, the cell and the back plate.

[0072] Optionally, the thickness d7 of the first encapsulation layer satisfies 0.3 mm≤d7≤0.8 mm; and / or the thickness d8 of the second encapsulation layer satisfies 0.3 mm≤d8≤0.8 mm; and / or the thickness d9 of the backplane satisfies 0.3 mm≤d9≤0.7 mm.

[0073] Optionally, the back plate includes a flexible polymer material, specifically, the back plate includes PET (thermoplastic polyester), CPC (polyurethane) or a glass fiber composite material.

[0074] Optionally, the first encapsulation layer includes a high-cutoff encapsulation film, specifically, the first encapsulation layer includes one of a high-cutoff EVA (ethylene-vinyl acetate copolymer), POE (polyethylene octene co-elastomer), EPE (expandable polyethylene) or PVB (polyvinyl butyral) film.

[0075] Optionally, the second encapsulation layer includes a highly transparent encapsulation film. Specifically, the second encapsulation layer includes one of high-cutoff EVA, POE, EPE or PVB films.

[0076] In some technical solutions, optionally, the battery assembly further includes an electrode, which is electrically connected to the battery cell and is located on a side of the battery cell facing away from the glass assembly.

[0077] In this technical solution, it is defined that the battery assembly also includes electrodes. Specifically, the electrodes are electrically connected to the battery cell, and the electrodes are located on the side of the battery cell away from the glass assembly, that is, the electrodes are located on the backlight side of the battery cell. That is, both the positive and negative metal electrodes are led out from the back of the battery cell, which improves the aesthetics of the photovoltaic device.

[0078] Optionally, the cell comprises an XBC (interdigitated back contact solar cell), an MWT (metal wire wrapped through hole solar cell) or a shingled cell without metal grid lines.

[0079] Optionally, the electrodes include a positive electrode and a negative electrode.

[0080] Additional aspects and advantages of the present invention will be given in the following description, and some will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0082] Figure 1 A schematic structural diagram of a glass assembly according to an embodiment of the utility model is shown;

[0083] Figure 2 A schematic structural diagram of a photovoltaic device according to an embodiment of the utility model is shown.

[0084] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0085] 100 glass component, 110 glass substrate, 111 light-receiving side, 112 backlight side, 120 heat-reflecting layer, 130 anti-oxidation layer, 140 absorption layer, 150 first protective layer, 160 second protective layer, 200 photovoltaic device, 210 battery component, 211 battery cell, 212 backplane, 213 first encapsulation layer, 214 second encapsulation layer, 220 electrode. DETAILED DESCRIPTION

[0086] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0087] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0088] Refer to the following Figure 1 and Figure 2 The glass assembly 100 and the photovoltaic device 200 provided according to some embodiments of the present invention are described.

[0089] In one embodiment according to the present application, Figure 1 As shown, a glass component 100 is proposed, and the glass component 100 includes: a glass substrate 110; a heat reflection layer 120, which is arranged on the light receiving side 111 of the glass substrate 110, and the heat reflection layer 120 can reflect infrared light and transmit visible light; wherein the heat reflection layer 120 includes a silver film layer, a copper film layer or a titanium film layer.

[0090] The glass assembly 100 provided by the embodiment of the utility model includes a glass substrate 110 and a heat reflection layer 120. Specifically, the heat reflection layer 120 is arranged on the light receiving side 111 of the glass substrate 110. The heat reflection layer 120 can reflect infrared light and transmit visible light. In other words, by arranging the heat reflection layer 120 on the light receiving side 111 of the glass substrate 110, when light is irradiated on the heat reflection layer 120, infrared light can be reflected.

[0091] It is understandable that the spectrum of solar radiation to the earth's surface is mainly: ultraviolet region, wavelength 280nm-380nm, accounting for about 5%; visible light region, wavelength 380nm-780nm, accounting for about 50%; near infrared region, wavelength 780nm-2500nm, accounting for about 43%. Among them, the ultraviolet region has the least heat, followed by the visible light region, and the near infrared region has a higher heat.

[0092] Since the light-receiving side 111 of the glass substrate 110 is provided with a heat-reflecting layer 120 capable of reflecting infrared light, the glass assembly 100 has a higher reflectivity to infrared light, thereby being able to reduce the surface temperature of the photovoltaic device 200 having the glass assembly 100 under light, thereby improving the power generation efficiency of the photovoltaic device 200 and increasing the amount of power generated.

[0093] Moreover, it is understandable that as the sunlight exposure time increases, the surface temperature of the photovoltaic device 200 may exceed 70° C., and every 10° C. increase in temperature will cause the attenuation aging rate of the photovoltaic device 200 to double.

[0094] Since the surface temperature of the photovoltaic device 200 under light is reduced, it is also beneficial to slow down the decay and aging speed of the photovoltaic device 200 and extend the service life of the photovoltaic device 200.

[0095] At the same time, the heat reflection layer 120 can also transmit visible light, so that the glass component 100 has a higher transmittance to visible light, that is, it has a lower reflectivity to visible light, thereby ensuring that the photovoltaic device 200 with the glass component 100 can convert light energy into electrical energy while reducing the surface temperature of the photovoltaic device 200 under light.

[0096] The heat reflection layer 120 includes an Ag film layer, a Cu film layer or a Ti film layer. It is understood that the Ag film layer, the Cu film layer or the Ti film layer has a high reflectivity to infrared light and a high transmittance to visible light, thereby increasing the reflectivity of the glass component 100 to infrared light and the transmittance to visible light. This can reduce the surface temperature of the photovoltaic device 200 having the glass component 100 under light, and improve the power generation efficiency of the photovoltaic device 200. It is also beneficial to slow down the decay and aging speed of the photovoltaic device 200 and extend the service life of the photovoltaic device 200.

[0097] In addition, it can be understood that the Ag film layer and the Cu film layer have colors, so that the glass component 100 presents a variety of color effects, thereby improving the color richness and three-dimensional effect of the photovoltaic device 200 having the glass component 100.

[0098] It is worth mentioning that the Ag film layer, the Cu film layer and the Ti film layer are all low-emissivity layers.

[0099] Optionally, the glass assembly 100 is a front plate of the photovoltaic device 200 .

[0100] Optionally, a magnetron sputtering coating method is used to coat a heat reflective layer 120 on the glass substrate 110 , thereby achieving precise control of the coating thickness of the heat reflective layer 120 .

[0101] Optionally, the glass substrate 110 includes a tempered glass substrate 110 or a semi-tempered glass substrate 110 .

[0102] In some embodiments, optionally, the thickness d1 of the heat reflective layer 120 satisfies 15 nm≤d1≤20 nm.

[0103] In this embodiment, the value range of the thickness of the heat reflective layer 120 is limited. Specifically, the thickness of the heat reflective layer 120 is between 15nm and 20nm. It is understandable that if the thickness of the heat reflective layer 120 is too thick, that is, d1 is greater than 20nm, the transmittance of visible light will be reduced, affecting the power generation efficiency.

[0104] Correspondingly, if the thickness of the heat reflection layer 120 is too thin, that is, d1 is less than 15 nm, the thickness of the heat reflection layer 120 may be uneven during coating, thereby affecting the heat reflection effect.

[0105] Therefore, by limiting the thickness of the heat reflection layer 120 to between 15nm and 20nm, the reflectivity of the glass component 100 to infrared light can be improved while ensuring the visible light transmittance, thereby reducing the surface temperature of the photovoltaic device 200 under light, improving the power generation efficiency of the photovoltaic device 200, and extending the service life of the photovoltaic device 200.

[0106] In some embodiments, optionally, at least a portion of the glass substrate 110 is configured as a curved glass substrate.

[0107] In this embodiment, at least a portion of the glass substrate 110 is defined as a curved glass substrate. Thus, after the light-receiving side 111 of the curved glass substrate is coated, the glass assembly 100 is formed into a curved glass, and further, after the curved glass is combined with the battery assembly 210, a curved photovoltaic tile is formed, thereby improving the appearance of the photovoltaic device 200.

[0108] Optionally, the curved glass substrate includes a single-peak curved glass substrate or a multi-peak and multi-trough curved glass substrate.

[0109] In some embodiments, optionally, a radius R of the curved glass substrate satisfies 30 nm≤R≤150 nm; and / or a thickness d2 of the curved glass substrate satisfies 3 mm≤d2≤8 mm.

[0110] In this embodiment, the range of the radius of curvature of the curved glass substrate is limited. Specifically, the radius of curvature of the curved glass substrate is between 30nm and 150nm. That is, the radius of curvature of the curved glass substrate is between 30nm and 150nm. Thus, while ensuring the appearance of the glass assembly 100, the problem of the battery cell 211 being broken due to excessive deformation when the battery cell 211 is assembled with the glass assembly 100 can be avoided. It can also facilitate the processing and manufacturing of the curved glass substrate, reduce the manufacturing difficulty, and improve production efficiency.

[0111] The thickness of the curved glass substrate is between 3 mm and 8 mm, which can facilitate the processing and shaping of the curved glass substrate, prevent the curved glass substrate from being broken due to excessive deformation during the processing, and improve the yield rate.

[0112] like Figure 1 As shown, in some embodiments, optionally, the glass assembly 100 further includes an anti-oxidation layer 130 and an absorption layer 140 , wherein the anti-oxidation layer 130 is disposed on a side of the heat reflecting layer 120 close to the glass substrate 110 , and the absorption layer 140 is disposed on a side of the heat reflecting layer 120 away from the glass substrate 110 .

[0113] In this embodiment, it is defined that the glass assembly 100 further includes an anti-oxidation layer 130 and an absorption layer 140. Specifically, the anti-oxidation layer 130 is arranged on a side of the heat reflective layer 120 close to the glass substrate 110, and the absorption layer 140 is arranged on a side of the heat reflective layer 120 away from the glass substrate 110. That is, the heat reflective layer 120 is encapsulated between the two optical layer stacks of the anti-oxidation layer 130 and the absorption layer 140.

[0114] It is understandable that the heat reflective layer 120 generally adopts a low-radiation film layer such as an Ag film layer, a Cu film layer or a Ti film layer. By encapsulating the low-radiation film layer such as the Ag film layer, the Cu film layer or the Ti film layer between the two optical layer stacks of the anti-oxidation layer 130 and the absorption layer 140, the heat reflective layer 120 is protected, thereby preventing the heat reflective layer 120 from being oxidized and extending the service life of the glass assembly 100.

[0115] It is worth noting that low-radiation film layers such as Ag film layers, Cu film layers or Ti film layers are encapsulated between the two optical layer stacks of the anti-oxidation layer 130 and the absorption layer 140, so that the glass component 100 has a transmittance of more than 75% for visible light, a reflectivity of less than 10% for visible light, and a reflectivity of more than 90% for infrared light, which effectively reduces the surface temperature of the photovoltaic device 200 under light and increases power generation.

[0116] Optionally, the anti-oxidation layer 130 includes a metal oxide film layer. Specifically, the anti-oxidation layer 130 includes a ZnO film layer or an AZO film layer.

[0117] Optionally, the anti-oxidation layer 130 includes a Si3N4 film layer or a SiCrN x Membrane layer.

[0118] Optionally, the absorption layer 140 includes a metal alloy film layer or a metal oxide film layer.

[0119] Optionally, the absorption layer 140 includes a NiCr film layer or a NiCrO x Membrane layer.

[0120] In some embodiments, optionally, the anti-oxidation layer 130 includes a metal oxide film layer; and / or the absorption layer 140 includes a metal alloy film layer or a metal oxide film layer.

[0121] In this embodiment, the anti-oxidation layer 130 includes a metal oxide film layer, thereby protecting the heat reflective layer 120 and preventing the heat reflective layer 120 from being oxidized. In addition, the metal oxide film layer is relatively cheap and easily available, which is beneficial to reducing the production cost of the glass assembly 100.

[0122] The absorption layer 140 includes a metal alloy film layer or a metal oxide film layer, thereby protecting the heat reflection layer 120 and preventing the heat reflection layer 120 from being oxidized. The metal alloy film layer or the metal oxide film layer can absorb energy, thereby further reducing the surface temperature of the photovoltaic device 200 under light.

[0123] In some embodiments, the anti-oxidation layer 130 may include a ZnO film layer or an AZO film layer; and / or the absorption layer 140 may include a NiCr film layer or a NiCrO film layer. x Membrane layer.

[0124] In some embodiments, optionally, the thickness d3 of the anti-oxidation layer 130 satisfies 15 nm≤d3≤30 nm; and / or the thickness d4 of the absorption layer 140 satisfies 1 nm≤d4≤10 nm.

[0125] In this embodiment, the range of values ​​of the thickness of the anti-oxidation layer 130 is limited. Specifically, the thickness of the anti-oxidation layer 130 is between 15nm and 30nm. It is understandable that if the thickness of the anti-oxidation layer 130 is too thick, that is, d3 is greater than 30nm, the transmittance of visible light will be reduced, affecting the power generation efficiency.

[0126] Accordingly, if the thickness of the anti-oxidation layer 130 is too thin, that is, d3 is less than 15 nm, the thickness of the anti-oxidation layer 130 may be uneven during coating, which may affect the anti-oxidation effect of the glass component 100 .

[0127] Therefore, by limiting the thickness of the anti-oxidation layer 130 to between 15 nm and 30 nm, the heat reflection layer 120 can be effectively prevented from being oxidized while ensuring the visible light transmittance, thereby further improving the service life of the photovoltaic device 200 having the glass assembly 100 .

[0128] The thickness of the absorption layer 140 is between 1 nm and 10 nm, so that the absorption layer 140 can absorb energy, reduce the surface temperature of the photovoltaic device 200 under light, and ensure the transmittance of visible light, thereby ensuring the power generation efficiency.

[0129] like Figure 1 As shown, in some embodiments, optionally, the glass assembly 100 further includes a first protective layer 150 and a second protective layer 160 , wherein the first protective layer 150 is disposed between the anti-oxidation layer 130 and the glass substrate 110 , and the second protective layer 160 is disposed on a side of the absorption layer 140 away from the heat reflection layer 120 .

[0130] In this embodiment, it is defined that the glass assembly 100 further includes a first protective layer 150 and a second protective layer 160. Specifically, the first protective layer 150 is disposed between the anti-oxidation layer 130 and the glass substrate 110, and the second protective layer 160 is disposed on the side of the absorption layer 140 away from the heat reflection layer 120. That is, on the glass substrate 110, from the inside to the outside, there are the first protective layer 150, the anti-oxidation layer 130, the heat reflection layer 120, the absorption layer 140 and the second protective layer 160.

[0131] By providing the first protective layer 150, the light-to-heat ratio of the photovoltaic device 200 can be improved, and the compactness of the heat-reflecting layer 120 can be improved, and the reflectivity of the glass component 100 to infrared light can be further improved, thereby improving the heat reflection efficiency of the photovoltaic device 200 having the glass component 100, reducing the surface temperature of the photovoltaic device 200 under light, and improving the power generation efficiency.

[0132] In addition, by disposing the second protective layer 160 on the outermost side, the heat reflection layer 120 and the absorption layer 140 can be protected, thereby ensuring the service life of the glass assembly 100 having the heat reflection effect.

[0133] Optionally, a magnetron sputtering coating method is used to coat the first protective layer 150, the anti-oxidation layer 130, the heat reflection layer 120, the absorption layer 140 and the second protective layer 160 on the light-receiving side 111 of the glass substrate 110 to achieve precise control of the thickness of each film layer.

[0134] Moreover, the glass assembly 100 having the above-mentioned multiple film layers shows good transparency to visible light, but has high reflectivity to infrared radiation, and the multiple film layers are combined to present a variety of color effects, achieving the effect of being both beautiful and gorgeous, and being able to generate electricity and reflect heat, thereby enhancing the color richness and three-dimensional sense of the photovoltaic device 200 having the glass assembly 100.

[0135] In some embodiments, optionally, the first protective layer 150 includes a zinc oxide film layer, a tin oxide film layer or a zinc-tin composite oxide film layer; and / or the second protective layer 160 includes a Si3N4 film layer and / or an AlTiN x Membrane layer.

[0136] In this embodiment, the first protective layer 150 includes a zinc oxide film layer, a tin oxide film layer or a zinc-tin composite oxide film layer, that is, the first protective layer 150 is a zinc-tin metal oxide film layer. It can be understood that the oxide substrate has a significant effect on improving the light-to-heat ratio of the photovoltaic device 200, and can effectively improve the compactness of the heat reflective layer 120 and improve the heat reflectivity of the photovoltaic device 200.

[0137] The second protective layer 160 includes a Si3N4 film layer and / or an AlTiN x Membrane layer.

[0138] In some embodiments, optionally, the thickness d5 of the first protective layer 150 satisfies 20 nm≤d5≤30 nm; and / or the thickness d6 of the second protective layer 160 satisfies 15 nm≤d6≤40 nm.

[0139] In this embodiment, the value range of the thickness of the first protective layer 150 is limited. Specifically, the thickness of the first protective layer 150 is between 20nm and 30nm. It is understandable that if the thickness of the first protective layer 150 is too thick, that is, d5 is greater than 30nm, the transmittance of visible light will be reduced, affecting the power generation efficiency.

[0140] Accordingly, if the thickness of the first protective layer 150 is too thin, that is, d5 is less than 20 nm, the thickness of the first protective layer 150 may be uneven during coating, which may fail to significantly improve the light-to-heat ratio of the photovoltaic device 200 and affect the thermal reflection effect of the photovoltaic device 200 .

[0141] Therefore, by limiting the thickness of the first protective layer 150 to between 20 nm and 30 nm, the reflectivity of the glass component 100 to infrared light can be improved while ensuring the visible light transmittance, thereby reducing the surface temperature of the photovoltaic device 200 under light, improving the power generation efficiency of the photovoltaic device 200, and extending the service life of the photovoltaic device 200.

[0142] The thickness of the second protective layer 160 is between 15 nm and 40 mm, so as to ensure visible light transmittance while protecting the heat reflection layer 120 and the absorption layer 140 , thereby ensuring the service life of the glass assembly 100 with heat reflection effect.

[0143] According to a second aspect of the present invention, a photovoltaic device 200 is provided, comprising a glass assembly 100 as provided in any of the above embodiments, and thus having all the beneficial technical effects of the glass assembly 100, which will not be described in detail herein.

[0144] like Figure 2 As shown, the photovoltaic device 200 further includes a battery assembly 210 , and the battery assembly 210 is disposed on the backlight side 112 of the glass substrate 110 .

[0145] The photovoltaic device 200 provided in the embodiment of the utility model includes a glass component 100 and a battery component 210. Specifically, the battery component 210 is arranged on the backlight side 112 of the glass substrate 110, that is, the heat reflection layer 120 and the battery component 210 are respectively located on two opposite sides of the glass substrate 110.

[0146] Since the light-receiving side 111 of the glass substrate 110 is provided with a heat-reflecting layer 120 capable of reflecting infrared light, the glass assembly 100 has a higher reflectivity to infrared light, thereby being able to reduce the surface temperature of the photovoltaic device 200 having the glass assembly 100 under light, thereby improving the power generation efficiency of the photovoltaic device 200 and increasing the amount of power generated.

[0147] Moreover, since the surface temperature of the photovoltaic device 200 under light is reduced, it is also beneficial to slow down the decay and aging speed of the photovoltaic device 200 and extend the service life of the photovoltaic device 200.

[0148] At the same time, the heat reflection layer 120 can also transmit visible light, so that the glass component 100 has a higher transmittance to visible light, that is, it has a lower reflectivity to visible light, thereby ensuring that the photovoltaic device 200 with the glass component 100 can convert light energy into electrical energy while reducing the surface temperature of the photovoltaic device 200 under light.

[0149] Optionally, the photovoltaic device 200 includes photovoltaic tiles or photovoltaic panels.

[0150] like Figure 2 As shown, in some embodiments, optionally, the battery assembly 210 includes a battery cell 211, a back plate 212, a first encapsulation layer 213 and a second encapsulation layer 214, wherein the back plate 212 is located on the side of the battery cell 211 away from the glass assembly 100, the first encapsulation layer 213 is arranged between the battery cell 211 and the glass assembly 100, and the second encapsulation layer 214 is arranged between the battery cell 211 and the back plate 212; wherein the thickness d7 of the first encapsulation layer 213 satisfies 0.3mm≤d7≤0.8mm; and / or the thickness d8 of the second encapsulation layer 214 satisfies 0.3mm≤d8≤0.8mm; and / or the thickness d9 of the back plate 212 satisfies 0.3mm≤d9≤0.7mm.

[0151] In this embodiment, it is defined that the battery assembly 210 includes a battery cell 211, a back plate 212, a first encapsulation layer 213, and a second encapsulation layer 214. Specifically, along the thickness direction of the photovoltaic device 200, from top to bottom, the glass assembly 100, the first encapsulation layer 213, the battery cell 211, the second encapsulation layer 214, and the back plate 212 are provided. In other words, the glass assembly 100 is the front plate of the photovoltaic device 200. Thus, the photovoltaic device 200 has a higher reflectivity for infrared light and a higher transmittance for visible light, reduces the surface temperature of the photovoltaic device 200 under light, improves power generation efficiency and power generation, and prolongs the service life of the photovoltaic device 200.

[0152] It is understandable that the light-receiving surface of the cell 211 is protected by the glass assembly 100, and the backlight surface of the cell 211 is protected by the back plate 212. The first encapsulation layer 213 and the second encapsulation layer 214 realize the bonding of the glass assembly 100, the cell 211 and the back plate 212.

[0153] Optionally, the thickness d7 of the first encapsulation layer 213 satisfies 0.3 mm≤d7≤0.8 mm; and / or the thickness d8 of the second encapsulation layer 214 satisfies 0.3 mm≤d8≤0.8 mm; and / or the thickness d9 of the back plate 212 satisfies 0.3 mm≤d9≤0.7 mm.

[0154] Optionally, the back plate 212 includes a flexible polymer material, specifically, the back plate 212 includes PET (thermoplastic polyester), CPC (polyurethane) or a glass fiber composite material.

[0155] Optionally, the first encapsulation layer 213 includes a high-cutoff encapsulation film, specifically, the first encapsulation layer 213 includes one of high-cutoff EVA (ethylene-vinyl acetate copolymer), POE (polyethylene octene elastomer), EPE (expandable polyethylene) or PVB (polyvinyl butyral) films.

[0156] Optionally, the second encapsulation layer 214 includes a highly transparent encapsulation film. Specifically, the second encapsulation layer 214 includes one of high-cutoff EVA, POE, EPE or PVB films.

[0157] like Figure 2 As shown, in some embodiments, optionally, the battery assembly 210 further includes an electrode 220 , which is electrically connected to the battery cell 211 and is located on a side of the battery cell 211 facing away from the glass assembly 100 .

[0158] In this embodiment, it is defined that the battery assembly 210 further includes an electrode 220. Specifically, the electrode 220 is electrically connected to the battery cell 211, and the electrode 220 is located on the side of the battery cell 211 away from the glass assembly 100, that is, the electrode 220 is located on the backlight side 112 of the battery cell 211. That is, both the positive and negative metal electrodes 220 are led out from the back of the battery cell 211, thereby improving the aesthetics of the photovoltaic device 200.

[0159] Optionally, the cell 211 includes an XBC (interdigitated back contact solar cell), an MWT (metal wire through hole solar cell) or a shingled solar cell without metal grid lines.

[0160] Optionally, the electrode 220 includes a positive electrode and a negative electrode.

[0161] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0162] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0163] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A glass component, characterized in that: include: Glass substrate; A heat reflection layer is provided on the light-receiving side of the glass substrate, and the heat reflection layer can reflect infrared light and transmit visible light; Wherein, the heat reflection layer includes a silver film layer, a copper film layer or a titanium film layer.

2. The glass assembly according to claim 1, characterized in that: The thickness d1 of the heat reflection layer satisfies 15nm≤d1≤20nm.

3. The glass assembly according to claim 1 or 2, characterized in that: At least a portion of the glass substrate is configured as a curved glass substrate.

4. The glass assembly according to claim 3, characterized in that: The curved surface radius R of the curved glass substrate satisfies 30nm≤R≤150nm; and / or The thickness d2 of the curved glass substrate satisfies 3mm≤d2≤8mm.

5. The glass assembly according to claim 1 or 2, characterized in that: The glass assembly further comprises: An anti-oxidation layer, disposed on a side of the heat reflection layer close to the glass substrate; The absorption layer is arranged on a side of the heat reflection layer away from the glass substrate.

6. The glass assembly according to claim 5, characterized in that The anti-oxidation layer comprises a metal oxide film layer; and / or The absorption layer includes a metal alloy film layer or a metal oxide film layer.

7. The glass assembly according to claim 5, characterized in that: The anti-oxidation layer comprises a ZnO film layer or an AZO film layer; and / or The absorption layer includes a NiCr film layer or a NiCrO x Membrane layer.

8. The glass assembly according to claim 5, characterized in that: The thickness d3 of the anti-oxidation layer satisfies 15nm≤d3≤30nm; and / or The thickness d4 of the absorption layer satisfies 1nm≤d4≤10nm.

9. The glass assembly according to claim 5, characterized in that: The glass assembly further comprises: A first protective layer, disposed between the anti-oxidation layer and the glass substrate; The second protective layer is arranged on a side of the absorption layer away from the heat reflection layer.

10. The glass assembly according to claim 9, characterized in that The first protective layer comprises a zinc oxide film layer, a tin oxide film layer or a zinc-tin composite oxide film layer; and / or The second protective layer includes a Si3N4 film layer and / or an AlTiN x Membrane layer.

11. The glass assembly according to claim 9, characterized in that The thickness d5 of the first protective layer satisfies 20nm≤d5≤30nm; and / or The thickness d6 of the second protective layer satisfies 15nm≤d6≤40nm.

12. A photovoltaic device, characterized in that: include: The glass assembly according to any one of claims 1 to 11; A battery assembly is arranged on the backlight side of the glass substrate.

13. The photovoltaic device according to claim 12, characterized in that: The battery assembly comprises: Battery cells; A back plate, the back plate being located on a side of the cell away from the glass assembly; A first encapsulation layer and a second encapsulation layer, wherein the first encapsulation layer is disposed between the battery cell and the glass component, and the second encapsulation layer is disposed between the battery cell and the back plate; The thickness d7 of the first encapsulation layer satisfies 0.3 mm ≤ d7 ≤ 0.8 mm; and / or the thickness d8 of the second encapsulation layer satisfies 0.3 mm ≤ d8 ≤ 0.8 mm; and / or the thickness d9 of the back plate satisfies 0.3 mm ≤ d9 ≤ 0.7 mm.

14. The photovoltaic device according to claim 13, characterized in that The battery assembly also includes: The electrode is electrically connected to the battery cell and is located on a side of the battery cell away from the glass component.

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