High-reflection low-temperature ink photovoltaic double-glass assembly and solar power generation system

Abstract

The invention provides a high-reflection low-temperature ink photovoltaic double-glass assembly and a solar power generation system, and relates to the technical field of photovoltaic double-glass assemblies. The high-reflection low-temperature printing ink photovoltaic double-glass assembly comprises double-plated high-transmittance front glass, a transmittance packaging front adhesive film, a double-sided crystalline silicon battery piece, a cut-off packaging rear adhesive film and high-reflection low-temperature printing ink back glass which are sequentially arranged in a stacked mode. And low-temperature ink high-reflection layers are arranged on one surface, adjacent to the cut-off packaged adhesive film, of the high-reflection low-temperature ink back glass and one surface, far away from the cut-off packaged adhesive film, of the high-reflection low-temperature ink back glass. According to the high-reflection low-temperature printing ink photovoltaic double-glass assembly, the low-temperature printing ink high-reflection layer is arranged on the surface of the high-reflection low-temperature printing ink back glass, the reflection capability of the back glass is improved, the power generation efficiency of the assembly is improved, secondary high-temperature curing can be avoided through the low-temperature printing ink high-reflection layer, and the problems of uneven stress and warping are solved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic double-glass module technology, and in particular to a high-reflectivity low-temperature ink photovoltaic double-glass module and a solar power generation system. Background Technology

[0002] Currently, the photovoltaic industry primarily uses rolled ultra-clear glass as the substrate for screen printing backsheets, manufactured through high-temperature tempering and traditional glazing screen printing processes. Due to the thickness variations in rolled glass, after being subjected to high-temperature tempering, uneven stress, abnormal warping around the edges, and frequent breakage of glazed mesh glass under conditions such as strong winds or hail in end-use applications are common problems. High-temperature tempering and traditional glazing screen printing processes also suffer from uneven screen printing, low yield, high manufacturing costs, and low reflectivity. Summary of the Invention

[0003] The purpose of this application is to provide a high-reflectivity, low-temperature ink photovoltaic double-glass module and a solar power generation system to solve the above-mentioned problems.

[0004] To achieve the above objectives, the first aspect of this application provides a high-reflectivity low-temperature ink photovoltaic double-glass module, comprising a double-coated high-transparency front glass, a transparent encapsulation front film, a double-sided crystalline silicon solar cell, a closed encapsulation back film, and a high-reflectivity low-temperature ink back glass, which are stacked sequentially.

[0005] The high-reflectivity low-temperature ink back glass is provided with a low-temperature ink high-reflectivity layer on both the side adjacent to the cut-off encapsulated film and the side away from the cut-off encapsulated film.

[0006] Optionally, the low-temperature ink high-reflectivity layer includes: a modified acrylic low-temperature ink layer and a high-reflectivity film layer;

[0007] The modified acrylic low-temperature ink layer is disposed between the high-reflectivity low-temperature ink back glass and the high-reflectivity film layer.

[0008] Optionally, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0009] A. The raw material for the modified acrylate low-temperature ink layer includes modified acrylate resin;

[0010] B. The raw materials of the high-reflectivity film include one or more of C3H4O2, Bi2Ti2O7, B2O3-ZnO-SiO2, ZnO, (Zn)3(PO4)2, SiO2, ZrO2, Al2O3, CaCO3, and TiO2.

[0011] Optionally, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0012] A. The thickness ratio of the modified acrylate low-temperature ink layer to the high-reflectivity film layer is (75-350):1;

[0013] B. The thickness of the low-temperature ink high-reflectivity layer is ≤3.5mm.

[0014] Optionally, the high-reflectivity low-temperature ink back glass includes an embossed surface and a plush surface;

[0015] The embossed surface is in contact with the sealing film after the cut-off encapsulation;

[0016] The plush surface is away from the cut-off encapsulation film.

[0017] Optionally, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0018] A. The embossed surface pattern includes one or more of the following: pyramidal triangular patterns, rectangular patterns, and polygonal patterns;

[0019] B. The embossing depth of the embossed surface is 30μm-100μm;

[0020] C. The pattern of the plush surface includes one or more of the following: regular hexagonal pattern, square pattern, and honeycomb pattern;

[0021] D. The surface roughness of the plush surface is 0.3µm-3.0µm;

[0022] E. The depth of the pattern on the plush surface is 15um-90um.

[0023] Optionally, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0024] A. The thickness of the high-reflectivity low-temperature ink back glass is 10μm-40μm;

[0025] B. The low-temperature ink high-reflectivity layer has an average reflectivity of 75%-90% within the wavelength range of 380nm-1200nm.

[0026] Optionally, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0027] A. The high-reflectivity low-temperature ink back glass includes ultra-white patterned glass and / or float photovoltaic glass;

[0028] B. The low-temperature ink high-reflectivity layer is mesh-like.

[0029] Optionally, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0030] A. The double-coated high-transparency front glass includes one or more of rolled glass, float tempered glass, and float semi-tempered glass;

[0031] B. A single or multiple anti-reflective coating is provided on the double-coated high-transparency front glass;

[0032] C. The bifacial crystalline silicon solar cell includes monocrystalline silicon cells and / or polycrystalline silicon cells;

[0033] D. The spacing between any two adjacent battery strings is 0.5mm-20mm;

[0034] E. The distance between any two adjacent solar cells is -5.0 to -5.0 mm;

[0035] F. The raw materials of the pre-encapsulation adhesive film and the post-encapsulation adhesive film are each independently one or more of POE, EVA, PVB, EPE, and silicone.

[0036] A second aspect of this application provides a solar power generation system, including the aforementioned high-reflectivity low-temperature ink photovoltaic double-glass module.

[0037] Compared with the prior art, the beneficial effects of this application include:

[0038] The high-reflectivity low-temperature ink photovoltaic double-glass module provided in this application has a low-temperature ink high-reflectivity layer on the surface of the high-reflectivity low-temperature ink back glass, which improves the reflectivity of the back glass and thus improves the power generation efficiency of the module. In addition, the low-temperature ink high-reflectivity layer can avoid secondary high-temperature curing and reduce stress unevenness and warping problems.

[0039] The solar power generation system provided in this application has high power generation efficiency and long service life. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope of this application.

[0041] Figure 1 This is a schematic diagram of the structure of the high-reflectivity low-temperature ink photovoltaic double-glass module provided in Example 1. Detailed Implementation

[0042] As used in this article:

[0043] "Prepared from" is synonymous with "comprising". The terms "comprising", "including", "having", "containing", or any other variations thereof as used herein are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0044] The conjunction "composed of..." excludes any unspecified elements, steps, or components. If used in a claim, this phrase makes the claim closed, excluding materials other than those described, except for associated conventional impurities. When the phrase "composed of..." appears in a clause of the body of a claim rather than immediately following it, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0045] When a quantity, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether the range is disclosed individually. For example, when the range “1–5” is disclosed, the described range should be interpreted as including ranges “1–4”, “1–3”, “1–2”, “1–2 and 4–5”, “1–3 and 5”, etc. When numerical ranges are described herein, unless otherwise stated, the range is intended to include its endpoints and all integers and fractions within that range.

[0046] In these embodiments, unless otherwise specified, the portions and percentages are all by weight.

[0047] "Parts by mass" refers to the basic unit of measurement that expresses the mass ratio of multiple components. One part can represent any unit mass, such as 1g or 2.689g. If we say that component A has "a" parts by mass and component B has "b" parts by mass, it means the ratio of the mass of component A to the mass of component B is a:b. Alternatively, it can mean that the mass of component A is aK and the mass of component B is bK (K is any number representing a multiplier). It is important to understand that, unlike the number of parts by mass, the sum of the mass parts of all components is not limited to 100 parts.

[0048] "And / or" is used to indicate that one or both of the described situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0049] The first aspect of this application provides a high-reflectivity low-temperature ink photovoltaic double-glass module, comprising a double-coated high-transparency front glass, a transparent encapsulation front film, a double-sided crystalline silicon solar cell, a cut-off encapsulation back film, and a high-reflectivity low-temperature ink back glass, which are stacked sequentially.

[0050] The high-reflectivity low-temperature ink back glass is provided with a low-temperature ink high-reflectivity layer on both the side adjacent to the cut-off encapsulated film and the side away from the cut-off encapsulated film.

[0051] In some embodiments, the low-temperature ink high-reflectivity layer comprises: a modified acrylic low-temperature ink layer and a high-reflectivity film layer;

[0052] The modified acrylic low-temperature ink layer is disposed between the high-reflectivity low-temperature ink back glass and the high-reflectivity film layer.

[0053] It is worth noting that modified acrylic low-temperature ink layers are chosen because of their excellent adhesion, weather resistance, and optical properties. These modified acrylic low-temperature inks can be cured at lower temperatures, thereby reducing energy consumption and minimizing the thermal impact on the substrate, maintaining the integrity and performance of the substrate. Using modified acrylic low-temperature ink layers can reduce energy consumption in the production process, improve production efficiency, and contribute to environmental protection.

[0054] It is also important to note that high-reflectivity films can maximize the reflection of sunlight, thereby improving the photoelectric conversion efficiency of photovoltaic modules. This layer is usually composed of multiple thin films, each with a precisely designed thickness and refractive index to control light interference and reflection. By increasing reflectivity, light energy loss can be reduced, allowing more light energy to be absorbed by the photovoltaic cells, thus improving the power generation efficiency of the photovoltaic module. In photovoltaic modules, these high-reflectivity layers are typically applied to the backsheet glass to increase the module's utilization of sunlight. By optimizing the position and performance of these layers, the overall performance and power generation efficiency of photovoltaic power plants can be significantly improved.

[0055] In some embodiments, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0056] A. The raw material for the modified acrylate low-temperature ink layer includes modified acrylate resin;

[0057] It is worth noting that modified acrylic resins are chosen for their excellent adhesion, weather resistance, and optical properties. These resins can be cured at lower temperatures, thereby reducing energy consumption and minimizing the thermal impact on the substrate. Using modified acrylic resins can improve the adhesion and weather resistance of inks, while reducing energy consumption in the production process and increasing production efficiency.

[0058] B. The raw materials of the high-reflectivity film include one or more of C3H4O2, Bi2Ti2O7, B2O3-ZnO-SiO2, ZnO, (Zn)3(PO4)2, SiO2, ZrO2, Al2O3, CaCO3, and TiO2.

[0059] It is important to note that the raw materials for these high-reflectivity films can significantly increase the reflectivity of the back side of photovoltaic modules, thereby increasing the amount of light reaching the cells and improving photoelectric conversion efficiency. Specifically, the addition of Bi₂Ti₂O₇ nanocrystals can enhance the reflectivity for near-infrared light, thus improving the reflectivity of the photovoltaic glass backsheet. By optimizing the raw materials and formulations of these high-reflectivity films, the power generation efficiency of photovoltaic modules can be significantly improved, especially in double-glass modules, where the reflected light from the back side can significantly increase power generation. The use of these high-reflectivity materials, combined with low-temperature curing technology, not only improves the performance of photovoltaic modules but also meets the requirements of environmental protection and energy conservation in production.

[0060] In some embodiments, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0061] A. The thickness ratio of the modified acrylate low-temperature ink layer to the high-reflectivity film layer is (75-350):1;

[0062] Optionally, the thickness ratio of the modified acrylate low-temperature ink layer to the high-reflectivity film layer can be any value between 75:1, 100:1, 150:1, 200:1, 250:1, 300:1, 350:1 or (75-350):1;

[0063] B. The thickness of the low-temperature ink high-reflectivity layer is ≤3.5mm.

[0064] Optionally, the thickness of the low-temperature ink high-reflectivity layer can be any value between 1mm, 2mm, 3mm, 3.5mm or ≤3.5mm.

[0065] It is important to note that a low-temperature ink high-reflectivity layer with a thickness of ≤3.5mm can improve the photoelectric conversion efficiency of the module. By increasing the reflectivity of the backsheet, more light can be absorbed by the solar cells, thereby increasing the module's power generation. It can also reduce the module's temperature, as the high-reflectivity layer can reduce the heat absorbed by the backsheet, thus lowering the module's operating temperature and improving its long-term stability and performance. Furthermore, it can enhance the module's durability, as the high-reflectivity film provides additional protection against environmental factors that could damage the backsheet glass.

[0066] In some embodiments, the high-reflectivity low-temperature ink back glass includes an embossed surface and a plush surface;

[0067] The embossed surface is in contact with the sealing film after the cut-off encapsulation;

[0068] The plush surface is away from the cut-off encapsulation film.

[0069] It is important to note that a textured surface can optimize the optical and mechanical properties of photovoltaic modules. By increasing surface roughness, it can improve light scattering, thereby reducing direct light reflection, increasing light utilization efficiency, and improving the power generation efficiency of photovoltaic cells. At the same time, appropriate roughness can also enhance mechanical strength and wear resistance, thereby improving the durability of the modules.

[0070] In some embodiments, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0071] A. The embossed surface pattern includes one or more of the following: pyramidal triangular patterns, rectangular patterns, and polygonal patterns;

[0072] B. The embossing depth of the embossed surface is 30μm-100μm;

[0073] Optionally, the embossing depth of the embossed surface can be any value between 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, 100μm or 30μm-100μm;

[0074] C. The pattern of the plush surface includes one or more of the following: regular hexagonal pattern, square pattern, and honeycomb pattern;

[0075] It should be noted that when the plush surface presents a honeycomb shape, it creates a micro-light-focusing effect. Combined with a low-temperature ink high-reflectivity layer, the light source refraction path is extended, which can effectively improve the utilization rate of the light source and simultaneously bring about an increase in power.

[0076] D. The surface roughness of the plush surface is 0.3µm-3.0µm;

[0077] Optionally, the surface roughness of the plush surface can be any value between 0.3um, 0.5um, 1um, 2um, 3um, or 0.3um-3.0um;

[0078] E. The depth of the pattern on the plush surface is 15um-90um.

[0079] Optionally, the texture depth of the plush surface can be any value between 15μm, 20μm, 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, 100μm or 15μm-90μm.

[0080] It is important to note that the shape and depth of the plush fabric texture are also related to the heat dissipation performance of the high-reflectivity low-temperature ink photovoltaic double-glass module. A reasonable texture design can improve airflow and help dissipate heat, thereby reducing the operating temperature of the high-reflectivity low-temperature ink photovoltaic double-glass module and improving its long-term stability and efficiency.

[0081] In some embodiments, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0082] A. The thickness of the high-reflectivity low-temperature ink back glass is 10μm-40μm;

[0083] Optionally, the thickness of the high-reflectivity low-temperature ink back glass can be any value between 10μm, 20μm, 30μm, 40μm or 10μm-40μm;

[0084] B. The low-temperature ink high-reflectivity layer has an average reflectivity of 75%-90% within the wavelength range of 380nm-1200nm.

[0085] Optionally, the low-temperature ink high-reflectivity layer can have an average reflectivity of 75%, 80%, 85%, 90%, or any value between 75% and 90% within the wavelength range of 380nm-1200nm.

[0086] In some embodiments, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0087] A. The high-reflectivity low-temperature ink back glass includes ultra-white patterned glass and / or float photovoltaic glass;

[0088] B. The low-temperature ink high-reflectivity layer is mesh-like.

[0089] In some embodiments, the high-reflectivity low-temperature ink photovoltaic double-glass module satisfies at least one of the following conditions:

[0090] A. The double-coated high-transparency front glass includes one or more of rolled glass, float tempered glass, and float semi-tempered glass;

[0091] B. A single or multiple anti-reflective coating is provided on the double-coated high-transparency front glass;

[0092] C. The bifacial crystalline silicon solar cell includes monocrystalline silicon cells and / or polycrystalline silicon cells;

[0093] D. The spacing between any two adjacent battery strings is 0.5mm-20mm;

[0094] Optionally, the spacing between any two adjacent battery strings can be any value between 0.5mm, 1mm, 5mm, 10mm, 15mm, 20mm, or 0.5mm-20mm.

[0095] E. The distance between any two adjacent solar cells is -5.0 to -5.0 mm;

[0096] Optionally, the spacing between any two adjacent solar cells can be any value between -5.0mm, -4.0mm, -3.0mm, -2.0mm, -1.0mm, 0mm, 1mm, 2mm, 3mm, 4mm, 5mm or -5.0mm;

[0097] F. The raw materials of the pre-encapsulation adhesive film and the post-encapsulation adhesive film are each independently one or more of POE, EVA, PVB, EPE, and silicone.

[0098] A second aspect of this application provides a solar power generation system, including the aforementioned high-reflectivity low-temperature ink photovoltaic double-glass module.

[0099] The implementation schemes of this application will be described in detail below with reference to specific embodiments. However, those skilled in the art will understand that the following embodiments are only for illustrating this application and should not be regarded as limiting the scope of this application. Unless otherwise specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments used without specified manufacturers are all conventional products that can be purchased commercially.

[0100] Example 1

[0101] This embodiment provides a high-reflectivity, low-temperature ink-based photovoltaic double-glass module with dimensions of 2278mm × 1134mm, the specific structure of which is as follows: Figure 1 As shown, it includes a double-coated high-transparency front glass, a transparent encapsulation front film, a high-efficiency double-sided crystalline silicon solar cell, a high-transparency encapsulation back film, and a high-reflectivity low-temperature ink back glass, which are stacked in sequence.

[0102] The high-reflectivity low-temperature ink back glass with a thickness of 15μm includes an embossed surface and a plush surface. The embossed surface is in contact with the high-transparency encapsulation film, while the plush surface is away from the cut-off encapsulation film. The pattern on the embossed surface is a pyramidal triangular flower shape with an embossing depth of 30μm. The pattern on the plush surface is a regular hexagonal flower shape and a square flower shape, with a surface roughness of 0.85μm and a pattern depth of 25μm.

[0103] The embossed and plush surfaces are covered with a grid-like low-temperature ink high-reflection layer with a thickness of 2 mm. The low-temperature ink high-reflection layer includes a modified acrylic low-temperature ink layer and a high-reflection film layer. The modified acrylic low-temperature ink layer is disposed between the high-reflection low-temperature ink back glass and the high-reflection film layer. The raw material of the modified acrylic low-temperature ink layer includes modified acrylic resin, and the raw material of the high-reflection film layer includes TiO2. The single-layer thickness ratio of the modified acrylic low-temperature ink layer and the high-reflection film layer is 75:1.

[0104] The high-reflectivity, low-temperature ink backing glass is made of ultra-white patterned glass.

[0105] The double-coated high-transparency front glass is made of rolled glass;

[0106] Two layers of anti-reflective coating are applied to the double-coated high-transparency front glass;

[0107] Bifacial crystalline silicon solar cells, measuring 183.75mm × 182.2mm;

[0108] String arrangement: Cell spacing 0.8mm, string spacing 1.8mm;

[0109] The materials for the pre-encapsulation adhesive film and the post-encapsulation adhesive film are EPE and EVA, respectively.

[0110] Example 2

[0111] This embodiment provides a high-reflectivity low-temperature ink photovoltaic double-glass module with a size of 2278mm×1134mm, including a double-coated high-transparency front glass, a transparent encapsulation front film, a high-efficiency bifacial crystalline silicon solar cell, a cut-off encapsulation back film, and a high-reflectivity low-temperature ink back glass, which are stacked in sequence.

[0112] The high-reflectivity low-temperature ink back glass with a thickness of 25μm includes an embossed surface and a plush surface. The embossed surface is in contact with the adhesive film after the cut-off encapsulation, and the plush surface is away from the adhesive film after the cut-off encapsulation. The pattern of the embossed surface is rectangular and the embossing depth is 40μm. The pattern of the plush surface is a four-cornered flower, the surface roughness is 0.85um, and the pattern depth is 50um.

[0113] The embossed and plush surfaces are covered with a grid-like low-temperature ink high-reflection layer with a thickness of 2 mm. The low-temperature ink high-reflection layer includes a modified acrylic low-temperature ink layer and a high-reflection film layer. The modified acrylic low-temperature ink layer is disposed between the high-reflection low-temperature ink back glass and the high-reflection film layer. The raw material of the modified acrylic low-temperature ink layer includes modified acrylic resin, and the raw material of the high-reflection film layer includes TiO2. The single-layer thickness ratio of the modified acrylic low-temperature ink layer and the high-reflection film layer is 125:1.

[0114] The high-reflectivity, low-temperature ink backing glass is float photovoltaic glass;

[0115] The double-coated high-transparency front glass is made of float tempered glass and float semi-tempered glass;

[0116] Two layers of anti-reflective coating are applied to the double-coated high-transparency front glass;

[0117] The bifacial crystalline silicon solar cell is a polycrystalline silicon cell with dimensions of 183.75mm × 182.2mm;

[0118] String arrangement: Cell spacing 0.68mm, string spacing 1.8mm;

[0119] The raw material for both the pre-encapsulation adhesive film and the post-encapsulation adhesive film is POE.

[0120] Example 3

[0121] This embodiment provides a high-reflectivity, low-temperature ink-based photovoltaic double-glass module with dimensions of 2278mm × 1134mm, the specific structure of which is as follows: Figure 1 As shown, it includes a double-coated high-transparency front glass, a high-transparency encapsulation front film, a high-efficiency double-sided crystalline silicon solar cell, a cut-off encapsulation back film, and a high-reflectivity low-temperature ink back glass, which are stacked in sequence.

[0122] The high-reflectivity low-temperature ink back glass with a thickness of 35μm includes an embossed surface and a plush surface. The embossed surface is in contact with the adhesive film after the cut-off encapsulation, and the plush surface is away from the adhesive film after the cut-off encapsulation. The pattern of the embossed surface is a polygonal flower shape, and the embossing depth is 40μm. The pattern of the plush surface is a square flower shape, the surface roughness is 0.85um, and the pattern depth is 60μm.

[0123] The embossed and plush surfaces are covered with a grid-like low-temperature ink high-reflection layer with a thickness of 2 mm. The low-temperature ink high-reflection layer includes a modified acrylic low-temperature ink layer and a high-reflection film layer. The modified acrylic low-temperature ink layer is disposed between the high-reflection low-temperature ink back glass and the high-reflection film layer. The raw material of the modified acrylic low-temperature ink layer includes modified acrylic resin, and the raw material of the high-reflection film layer includes TiO2. The single-layer thickness ratio of the modified acrylic low-temperature ink layer and the high-reflection film layer is 350:1.

[0124] The high-reflectivity, low-temperature ink backing glass is made of ultra-white patterned glass.

[0125] The double-coated high-transparency front glass is made of rolled glass;

[0126] A single layer of anti-reflective coating is applied to the double-coated high-transparency front glass.

[0127] Bifacial crystalline silicon solar cells: Monocrystalline silicon solar cells, with dimensions of 183.75mm × 182.2mm;

[0128] String arrangement: Cell spacing 0.8mm, string spacing 1.8mm;

[0129] The materials for the pre-encapsulation adhesive film and the post-encapsulation adhesive film are EPE and EV, respectively.

[0130] Comparative Example 1

[0131] This comparative example provides a photovoltaic double-glass module, which differs from Example 1 in that the low-temperature ink high-reflection layer in Example 1 is replaced with conventional glazing, while other conditions are the same as in Example 1.

[0132] Example 1 generated 23.13 kWh more electricity than Comparative Example 1 in the same month.

[0133] Comparative Example 2

[0134] This comparative example provides a photovoltaic double-glass module, which differs from Example 1 in that: the low-temperature ink high-reflection layer of this comparative example only has a high-reflection film layer, while other conditions are the same as in Example 1.

[0135] Example 1 generated 15 kWh more electricity than Comparative Example 2 in the same month.

[0136] Comparative Example 3

[0137] This comparative example provides a photovoltaic double-glass module, which differs from Example 1 in that: the low-temperature ink high-reflection layer of this comparative example is only provided with a modified acrylic low-temperature ink layer, while other conditions are the same as in Example 1.

[0138] Example 1 generated 15 kWh more electricity than Comparative Example 3 in the same month.

[0139] Comparative Example 4

[0140] This comparative example provides a photovoltaic double-glass module, which differs from Example 1 in that: in this comparative example, a high-reflection film layer is disposed between a modified acrylic low-temperature ink layer and a high-reflection low-temperature ink back glass, while other conditions are the same as in Example 1.

[0141] Example 1 generated 8.6 kWh more electricity than Comparative Example 4 in the same month.

[0142] Comparative Example 5

[0143] This comparative example provides a photovoltaic double-glass module, which differs from Example 2 in that the low-temperature ink high-reflection layer in Example 2 is replaced with conventional ink glaze, while other conditions are the same as in Example 2.

[0144] Example 2 generated 26.3 kWh more electricity than Comparative Example 5 in the same month.

[0145] Comparative Example 6

[0146] This comparative example provides a photovoltaic double-glass module, which differs from Example 2 in that: the low-temperature ink high-reflection layer in this comparative example only has a high-reflection film layer, while other conditions are the same as in Example 2.

[0147] The high-reflectivity low-temperature ink photovoltaic double-glass modules or photovoltaic double-glass modules prepared in the above embodiments and comparative examples were subjected to a cumulative one-month power generation and power test. The specific test results are shown in Table 1.

[0148] Example 2 generated 15.81 kWh more electricity than Comparative Example 6 in the same month.

[0149] The months in Table 1 are the verification months for the tested power generation.

[0150] Table 1 Component Power and Power Generation

[0151]

[0152] As shown in Table 1, the high-reflectivity low-temperature ink photovoltaic double-glass module provided in this application generates an average monthly power output 12.43 kWh higher than that of conventional glaze modules.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0154] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the foregoing claims, any of the claimed embodiments can be used in any combination. The information disclosed in this background section is intended only to enhance the understanding of the general background of this application and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

Claims

1. A high-reflectivity, low-temperature ink-based photovoltaic double-glass module, characterized in that, The components include a double-layered high-transparency front glass, a transparent encapsulation front film, a double-sided crystalline silicon solar cell, a cut-off encapsulation back film, and a high-reflectivity low-temperature ink back glass, which are stacked sequentially. The high-reflectivity low-temperature ink back glass is provided with a low-temperature ink high-reflectivity layer on both the side adjacent to the cut-off encapsulated film and the side away from the cut-off encapsulated film.

2. The high-reflectivity low-temperature ink photovoltaic double-glass module according to claim 1, characterized in that, The low-temperature ink high-reflectivity layer comprises: a modified acrylic low-temperature ink layer and a high-reflectivity film layer; The modified acrylic low-temperature ink layer is disposed between the high-reflectivity low-temperature ink back glass and the high-reflectivity film layer.

3. The high-reflectivity low-temperature ink photovoltaic double-glass module according to claim 2, characterized in that, At least one of the following conditions must be met: A. The raw material for the modified acrylate low-temperature ink layer includes modified acrylate resin; B. The raw materials of the high-reflectivity film include one or more of C3H4O2, Bi2Ti2O7, B2O3-ZnO-SiO2, ZnO, (Zn)3(PO4)2, SiO2, ZrO2, Al2O3, CaCO3, and TiO2.

4. The high-reflectivity low-temperature ink photovoltaic double-glass module according to claim 2, characterized in that, At least one of the following conditions must be met: A. The thickness ratio of the modified acrylate low-temperature ink layer to the high-reflectivity film layer is (75-350):1; B. The thickness of the low-temperature ink high-reflectivity layer is ≤3.5mm.

5. The high-reflectivity low-temperature ink photovoltaic double-glass module according to claim 1, characterized in that, The high-reflectivity low-temperature ink back glass includes an embossed surface and a plush surface; The embossed surface is in contact with the sealing film after the cut-off encapsulation; The plush surface is away from the cut-off encapsulation film.

6. The high-reflectivity low-temperature ink photovoltaic double-glass module according to claim 5, characterized in that, At least one of the following conditions must be met: A. The embossed surface pattern includes one or more of the following: pyramidal triangular patterns, rectangular patterns, and polygonal patterns; B. The embossing depth of the embossed surface is 30μm-100μm; C. The pattern of the plush surface includes one or more of the following: regular hexagonal pattern, square pattern, and honeycomb pattern; D. The surface roughness of the plush surface is 0.3µm-3.0µm; E. The depth of the pattern on the plush surface is 15um-90um.

7. The high-reflectivity low-temperature ink photovoltaic double-glass module according to claim 1, characterized in that, At least one of the following conditions must be met: A. The thickness of the high-reflectivity low-temperature ink back glass is 10μm-40μm; B. The low-temperature ink high-reflectivity layer has an average reflectivity of 75%-90% within the wavelength range of 380nm-1200nm.

8. The high-reflectivity low-temperature ink photovoltaic double-glass module according to claim 1, characterized in that, At least one of the following conditions must be met: A. The high-reflectivity low-temperature ink back glass includes ultra-white patterned glass and / or float photovoltaic glass; B. The low-temperature ink high-reflectivity layer is mesh-like.

9. The high-reflectivity low-temperature ink photovoltaic double-glass module according to any one of claims 1-8, characterized in that, At least one of the following conditions must be met: A. The double-coated high-transparency front glass includes one or more of rolled glass, float tempered glass, and float semi-tempered glass; B. A single or multiple anti-reflective coating is provided on the double-coated high-transparency front glass; C. The bifacial crystalline silicon solar cell includes monocrystalline silicon cells and / or polycrystalline silicon cells; D. The spacing between any two adjacent battery strings is 0.5mm-20mm; E. The distance between any two adjacent solar cells is -5.0 to -5.0 mm; F. The raw materials of the pre-encapsulation adhesive film and the post-encapsulation adhesive film are each independently one or more of POE, EVA, PVB, EPE, and silicone.

10. A solar power generation system, characterized in that, Including the high-reflectivity low-temperature ink photovoltaic double-glass module as described in any one of claims 1-9.

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