A floating double-glass silicon module

Abstract

The present invention provides a floating double-glass crystalline silicon module, comprising a frame structure, an interlayer structure, and a junction box. The frame structure is arranged around the interlayer structure to reinforce it, and the junction box is mounted on the interlayer structure. The interlayer structure comprises a double-glass crystalline silicon module body and a thermal management functional material layer. The thermal management functional material layer comprises a hydrophilic functional film layer and a hydrophobic functional film layer. The hydrophilic functional film layer directly contacts the double-glass crystalline silicon module body. The floating double-glass crystalline silicon module provided by the present invention can effectively reduce the module's temperature coefficient and efficiency degradation, and improve its ability to absorb sunlight.

Description

Technical Field

[0001] The present invention relates to the field of energy materials, and in particular to a floating double-glass crystalline silicon component. Background Art

[0002] Since the "3060" dual carbon target was determined, with the exponential increase in the installed capacity of land-based photovoltaic power stations, there has been a serious shortage of land resources available for the installation and construction of photovoltaic modules, which has gradually become an important factor restricting the further development of the photovoltaic industry. In recent years, in order to solve the problem of shortage of land resources for photovoltaics and further broaden the development space of the photovoltaic industry, another independent branch of photovoltaic technology - floating photovoltaic power stations has gradually come into people's view. Floating photovoltaic refers to the power generation technology that installs photovoltaic power generation modules on floating bodies on the water surface. Compared with conventional land-based photovoltaic technology, floating photovoltaic power generation technology has higher investment and construction costs and greater difficulty in operation and maintenance, but it has the following advantages: (1) It does not occupy land resources, saves land resources, and can use the water surface of mining subsidence areas to generate electricity, realizing comprehensive land utilization; (2) Floating photovoltaic modules can reduce water evaporation, improve water quality, inhibit algae growth, and are beneficial to the protection of water resources; (3) Water has a cooling effect on photovoltaic modules and cables, which can effectively reduce the operating temperature of the photovoltaic backplane side and improve the power generation efficiency of photovoltaic modules. Since 2015, the annual independent installed capacity of floating photovoltaics has increased year by year. In particular, from 2019 to 2024, the installed capacity of global floating photovoltaic power stations is expected to grow at an average annual rate of 22%.

[0003] At present, unlike the single-glass crystalline silicon modules commonly used in land-based photovoltaic power generation, double-glass crystalline silicon modules are often used in floating photovoltaic power generation. In land-based photovoltaic scenarios, compared with traditional fluorine-containing backsheets, double-glass crystalline silicon modules can further enhance the recycling of sunlight reflected from the ground and increase the power generation gain of the back of the module by up to 5% to 25%. In addition, tempered glass has better corrosion resistance and higher mechanical strength than fluorine-containing backsheets, which is more suitable for the application scenario of floating photovoltaics. However, due to the limitations of existing photovoltaic module packaging technology, double-glass crystalline silicon modules still face the following problems during the use of floating photovoltaics: (1) The existing module packaging technology has a poor barrier effect on seawater. Specifically, the packaging materials mainly composed of packaging glue and EVA film have a poor barrier effect on anions and cations. The anions and cations rich in seawater enter the module through evaporating water vapor and cause leakage of the pn junction inside the cell, resulting in a decline in the power generation efficiency of the floating photovoltaic module; (2) Seawater cools the back panel of the photovoltaic module by absorbing heat through evaporation phase change, which results in a much larger temperature difference between the surface and back of the photovoltaic module in production and operation than that of the land-based photovoltaic module. The large temperature difference will aggravate the hidden cracking of the cell and lead to a decline in the working efficiency of the module;

[0004] (3) The back glass of photovoltaic modules near the water surface is prone to becoming a gathering place for plankton, which will seriously affect the back glass's ability to absorb sunlight. In addition, plankton parasites will significantly increase the weight of the module itself, causing the mechanical balance structure of the floating body to be destroyed, and the module to deviate from the preset tilt angle, resulting in a decline in the module's power generation efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a floating double-glass crystalline silicon module. The floating double-glass crystalline silicon module provided by the present invention can effectively reduce the temperature coefficient and efficiency degradation of the module and improve the ability to absorb sunlight.

[0006] The present invention provides a floating double-glass silicon module, comprising:

[0007] A frame structure (1), an interlayer structure (2) and a junction box (3); wherein the frame structure (1) is arranged around the interlayer structure (2) to reinforce the interlayer structure (2), and the junction box (3) is installed on the interlayer structure (2);

[0008] in,

[0009] The interlayer structure (2) comprises: a double-glass crystalline silicon component body (2-1) and a thermal management functional material layer (2-2);

[0010] The thermal management functional material layer (2-2) includes: a hydrophilic functional film layer 2-2-1 and a hydrophobic functional film layer (2-2-2); wherein the hydrophilic functional film layer (2-2-1) is in direct contact with the double-glass crystalline silicon component body (2-1).

[0011] Preferably, the hydrophilic functional film layer (2-2-1) is a hydrophilic SiO2 film layer, a hydrophilic MgO film layer, a hydrophilic TiO2 film layer, a hydrophilic Al2O3 film layer or a hydrophilic ZrO2 film layer;

[0012] The hydrophobic functional film layer (2-2-2) is a hydrophobic SiO2 film layer, a hydrophobic MgO film layer, a hydrophobic TiO2 film layer, a hydrophobic Al2O3 film layer or a hydrophobic ZrO2 film layer.

[0013] Preferably, the hydrophilic functional film layer (2-2-1) is a hydrophilic SiO2 film layer;

[0014] The hydrophobic functional film layer (2-2-2) is a hydrophobic SiO2 film layer.

[0015] Preferably, the thermal management functional material layer (2-2) has a porous structure.

[0016] Preferably, the porosity of the thermal management functional material layer (2-2) is 85% to 99.8%.

[0017] Preferably, the pore size of the thermal management functional material layer (2-2) is greater than 75 nm.

[0018] Preferably, the thickness of the thermal management functional material layer (2-2) is 210 to 550 nm.

[0019] Preferably, the thickness of the hydrophilic functional membrane layer (2-2-1) is 200 to 500 nm;

[0020] The thickness of the hydrophobic functional film layer (2-2-2) is 10 to 50 nm.

[0021] Preferably, the double-glass crystalline silicon component body (2-1) comprises the following laminated components:

[0022] Glass panel (2-1-1);

[0023] A first encapsulation film layer (2-1-2);

[0024] Battery cell (2-1-3);

[0025] A second encapsulation film layer (2-1-4);

[0026] Glass back panel (2-1-5).

[0027] Preferably, the junction box (3) is mounted on the glass back plate (2-1-5) of the double-glass crystalline silicon module body (2-1);

[0028] or

[0029] The junction box (3) is installed on the hydrophobic functional membrane layer (2-2-2) in the interlayer structure (2).

[0030] The floating double-glass crystalline silicon module provided by the present invention is provided with a thermal management functional material layer on the double-glass crystalline silicon module body, specifically a specific hydrophilic functional film layer and a hydrophobic functional film layer, to construct a hydrophilic-hydrophobic double-layer functional film layer, wherein the hydrophilic film layer can serve as a water storage area to store evaporated water vapor rich in anions and cations, which can significantly enhance the barrier ability of the module packaging material to anions and cations, and weaken the module efficiency decline caused by pn junction leakage; in addition, the hydrophilic functional layer with water storage function can serve as a cold source to further cool the module and further reduce the operating temperature of the photovoltaic module through phase change heat transfer; at the same time, the hydrophobic film layer can significantly improve the parasitic problem of plankton on the surface of the module, improve the acid resistance, alkali resistance, aging resistance, sterilization, and mildew resistance of the back glass, improve weather resistance, and extend service life. By providing the above-mentioned hydrophilic-hydrophobic double-layer functional film layer, the present invention can effectively solve the problems faced by the double-glass crystalline silicon modules in the use of floating photovoltaic in the prior art mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1 This is a schematic diagram of the overall appearance of the floating double-glass silicon module provided by the present invention;

[0033] Figure 2 A top view of the floating double-glass silicon module provided by the present invention;

[0034] Figure 3 A schematic diagram of the interlayer structure of a floating double-glass silicon module provided by the present invention;

[0035] Figure 4 This is a schematic structural diagram of a double-glass silicon module body according to an embodiment of the present invention;

[0036] Figure 5 Schematic diagram of the structure of the double-glass silicon component body in one embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention provides a floating double-glass silicon module, comprising:

[0038] A frame structure 1, an interlayer structure 2 and a junction box 3; wherein the frame structure 1 is arranged around the interlayer structure 2 to reinforce the interlayer structure 2, and the junction box 3 is installed on the interlayer structure 2;

[0039] in,

[0040] The interlayer structure 2 includes: a double glass-crystal silicon component body 2-1 and a thermal management functional material layer 2-2;

[0041] The thermal management functional material layer 2-2 includes: a hydrophilic functional film layer 2-2-1 and a hydrophobic functional film layer 2-2-2; wherein the hydrophilic functional film layer 2-2-1 is in direct contact with the double-glass crystalline silicon component body 2-1.

[0042] See also Figure 1-3 ,in, Figure 1 This is a schematic diagram of the overall appearance of the floating double-glass silicon module provided by the present invention. Figure 2 A top view of the floating double-glass silicon module provided by the present invention. Figure 3Schematic diagram of the interlayer structure in the floating double-glass crystalline silicon module provided by the present invention; wherein, 1 is the frame structure, 2 is the interlayer structure, 2-1 is the double-glass crystalline silicon module body, 2-2 is the thermal management functional material layer (2-2-1 is the hydrophilic functional film layer, 2-2-2 is the hydrophobic functional film layer), and 3 is the junction box.

[0043] About border structure 1 :

[0044] In the present invention, the frame structure 1 is preferably an aluminum alloy frame. In the present invention, the frame structure 1 is arranged around the interlayer structure 2 to reinforce the interlayer structure 2, protect the components, and facilitate the installation and fixation of the components and the combination and connection between battery component arrays.

[0045] About interlayer structure 2 :

[0046] In the present invention, the interlayer structure 2 includes: a double-glass crystalline silicon component body 2-1 and a thermal management functional material layer 2-2.

[0047] [About the double glass silicon module body 2-1]:

[0048] In the present invention, the structure of the double-glass crystalline silicon module body 2-1 is not particularly limited, and it can be a conventional double-glass crystalline silicon module body in the art. In one embodiment of the present invention, the double-glass crystalline silicon module body 2-1 includes the following laminated components: a glass panel 2-1-1, a first encapsulation film layer 2-1-2, a battery cell 2-1-3, a second encapsulation film layer 2-1-4, and a glass back panel 2-1-5. Figure 4-5 As shown, Figure 4 and Figure 5 This is a schematic structural diagram of the double-glass crystalline silicon module body in one embodiment of the present invention, wherein 2-1-1 is a glass panel, 2-1-2 is a first packaging film layer, 2-1-3 is a battery cell, 2-1-4 is a second packaging film layer, and 2-1-5 is a glass back panel.

[0049] in:

[0050] The glass panel 2-1-1 and glass backplane 2-1-5 are respectively encapsulated on the upper and lower sides of the double-glass crystalline silicon module body 2-1. In the art, these are also referred to as upper and lower glass, or top and bottom glass, or front and back glass, or panel glass and backplane glass, or glass cover and glass backplane. There are no specific orientation restrictions for the panel and backplane; if one side is the panel, the other side is naturally the backplane. In the present invention, the glass panel 2-1-1 is preferably tempered glass. The glass backplane 2-1-5 is preferably tempered glass.

[0051] The first encapsulating film layer 2-1-2 is disposed between the glass panel 2-1-1 and the cell 2-1-3, and the second encapsulating film layer 2-1-4 is disposed between the glass back panel 2-1-5 and the cell 2-1-3. In the present invention, the first encapsulating film layer 2-1-2 is preferably an encapsulating EVA film layer. The second encapsulating film layer 2-1-4 is preferably an encapsulating EVA film layer.

[0052] The cell 2-1-3 is a solar cell, which is arranged at the center of the double-glass crystalline silicon component body 2-1.

[0053] In the present invention, there is no special restriction on the packaging process of the above-mentioned double-glass crystalline silicon module body 2-1, and it can be packaged according to the conventional packaging process of photovoltaic modules in this field.

[0054] [About thermal management functional material layer 2-2]:

[0055] In the present invention, the thermal management functional material layer 2-2 includes a laminated composite: a hydrophilic functional film layer 2-2-1 and a hydrophobic functional film layer 2-2-2, wherein the hydrophilic functional film layer 2-2-1 is directly in contact with the double-glass crystalline silicon component body 2-1, that is, the hydrophilic functional film layer 2-2-1 is directly composited on the surface of the double-glass crystalline silicon component body 2-1, such as Figure 3 In the present invention, specifically, the hydrophilic functional film layer 2-2-1 is compounded on the surface of the glass back plate 2-1-5 in the double-glass crystalline silicon component body 2-1.

[0056] In the present invention, the hydrophilic functional film layer 2-2-1 is preferably a hydrophilic SiO2 film layer, a hydrophilic MgO film layer, a hydrophilic TiO2 film layer, a hydrophilic Al2O3 film layer, or a hydrophilic ZrO2 film layer, and more preferably a hydrophilic SiO2 film layer. In the present invention, the hydrophobic functional film layer 2-2-2 is preferably a hydrophobic SiO2 film layer, a hydrophobic MgO film layer, a hydrophobic TiO2 film layer, a hydrophobic Al2O3 film layer, or a hydrophobic ZrO2 film layer, and more preferably a hydrophobic SiO2 film layer. Coating materials can include MgO, TiO2, SiO2, Al2O3, ZrO2, etc. Since the backside power generation gain of double-glass modules can be as high as 5% to 25%, the present invention preferably uses SiO2 as the thermal management functional material, taking into account the anti-reflective properties, light transmittance, and thermal management functionality of the functional material layer. Furthermore, the use of a SiO2 film layer is beneficial for improving stability and bonding with the substrate, as well as being non-toxic, pollution-free, and having a low refractive index. Specifically, the hydrophilic SiO2 film layer can serve as a water storage area to store evaporated water vapor rich in anions and cations. This can significantly enhance the module encapsulation material's barrier capacity to anions and cations, mitigating module efficiency degradation caused by pn junction leakage. Furthermore, the hydrophilic SiO2 functional layer with a water storage function can serve as a cold source to further cool the module, further reducing the operating temperature of the photovoltaic module through phase change heat transfer. The hydrophobic SiO2 film layer can significantly improve the parasitic problem of plankton on the surface of the component, improve the acid resistance, alkali resistance, aging resistance, sterilization, and mildew resistance of the back glass, improve weather resistance, and extend service life; by setting a thermal management functional material layer composed of a hydrophilic SiO2 film layer and a hydrophobic SiO2 film layer and setting the position of the hydrophilic SiO2 film layer as a film layer that directly contacts the double-glass crystalline silicon component body 2-1, the problems faced by the double-glass crystalline silicon components in the prior art during the use of floating photovoltaics as mentioned above can be effectively solved.

[0057] In the present invention, the thermal management functional material layer 2-2 has a porous structure, specifically a typical cross-linked through-hole micro-channel structure. In the present invention, preferably, the pore size of the thermal management functional material layer 2-2 is controlled to be larger than the mean free path of air molecules (about 75nm), that is, the pore size of the thermal management functional material layer 2-2 is greater than 75nm. In the present invention, preferably, the porosity of the thermal management functional material layer 2-2 is controlled to be 85% to 99.8%. The above-mentioned specific porous morphology structure of the present invention can significantly enhance the convective heat transfer coefficient of the tempered glass-air interface, promote the enhancement of the heat exchange capacity between the glass backboard and the air, thereby weakening the problem of hidden cracks in the cell induced by the obstruction of interfacial heat transfer; in addition, the above-mentioned porous morphology can cause sunlight to be diffusely reflected at the back glass of the component, thereby enhancing the photovoltaic component's ability to absorb sunlight.

[0058] In the present invention, the thickness of the thermal management functional material layer 2-2 is preferably controlled to be 210 to 550 nm. At this thickness, the thermal management functional material layer is transparent and has a transmittance of more than 90% for sunlight within the range of 400 to 800 nm. Specifically, the thickness can be 210 nm, 225 nm, 250 nm, 275 nm, 300 nm, 325 nm, 350 nm, 375 nm, 400 nm, 425 nm, 450 nm, 475 nm, 500 nm, 525 nm, or 550 nm.

[0059] In the present invention, preferably, the thickness of the hydrophilic functional membrane layer 2-2-1 is 200 to 500 nm, specifically 200 nm, 250 nm, 300 nm, 350 nm, 400 nm, 450 nm, or 500 nm. The thickness of the hydrophobic functional membrane layer 2-2-2 is 10 to 50 nm, specifically 10 nm, 15 nm, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, or 50 nm.

[0060] In the present invention, after the double-glass crystalline silicon component body 2-1 is obtained by encapsulation, a thermal management functional material layer 2-2 is formed on its surface. In the present invention, the preparation method of the hydrophilic functional film layer 2-2-1 is preferably physical vapor deposition, chemical vapor deposition, plasma enhanced chemical vapor deposition, ion beam assisted deposition, molecular beam epitaxy, metal organic decomposition method or sol-gel method, etc., and more preferably a sol-gel method is used. The preparation method of the hydrophobic functional film layer 2-2-2 is preferably a surface post-treatment method, an in-situ chemical vapor deposition method, a cold ion improvement method or a sol-gel method, etc., and more preferably a sol-gel method is used. The processes of the above-mentioned preparation methods are not particularly limited and can be carried out according to conventional process procedures in the art. The present invention more preferably adopts the sol-gel method. Taking the SiO2 film layer as an example, compared with other film-forming methods, the SiO2 film layer prepared by the sol-gel method has the best mechanical properties and scrub resistance, and can withstand repeated wiping with cleaning agents for more than 5,000 times; in addition, the sol-gel method is conducive to controlling the micromorphology, can be designed and tailored at the molecular level, and is low-cost. Preferably, in actual preparation, before the double-glass silicon module is encapsulated, a hydrophilic functional film layer 2-2-1 and a hydrophobic functional film layer 2-2-2 are sequentially grown on the glass backplane 2-1-5 by the sol-gel method, and then a grain boundary bonding contact is formed at the interface between the two by heat treatment. The temperature of the heat treatment is preferably 500°C. The time of the heat treatment is preferably 60 to 120 minutes, and can specifically be 60 minutes, 70 minutes, 80 minutes, 90 minutes, 100 minutes, 110 minutes, or 120 minutes.

[0061] About Junction Box 3 :

[0062] In the present invention, the junction box 3 is installed on the interlayer structure 2, as shown in FIG. Figure 1-2 shown.

[0063] In one embodiment of the present invention, the junction box 3 is mounted on the double-glass crystalline silicon module body 2-1 in the interlayer structure 2, more specifically, on the glass backplane 2-1-5 of the double-glass crystalline silicon module body 2-1. In the actual manufacturing process of this structure, after the double-glass crystalline silicon module body 2-1 is packaged, the junction box 3 is first mounted on the glass backplane 2-1-5 of the double-glass crystalline silicon module body 2-1. Then, a thermal management functional material layer 2-2 is formed on the glass backplane 2-1-5 of the double-glass crystalline silicon module body 2-1. At this time, the region of the glass backplane 2-1-5 where the junction box 3 is mounted is not covered with the thermal management functional material. Instead, the thermal management functional material layer 2-2 is formed by coating the remaining regions of the glass backplane 2-1-5, excluding the region where the junction box 3 is mounted.

[0064] In another embodiment of the present invention, the junction box 3 is mounted on the thermal management functional material layer 2-2 in the interlayer structure 2, more specifically, on the hydrophobic functional film layer 2-2-2 in the interlayer structure 2. For this structure, in the actual manufacturing process, after the double-glass crystalline silicon module body 2-1 is encapsulated and the thermal management functional material layer 2-2 is formed on the glass backplane 2-1-5 of the double-glass crystalline silicon module body 2-1, the junction box 3 is mounted on the thermal management functional material layer 2-2.

[0065] In the present invention, there is no special limitation on the packaging process of the above-mentioned integral floating double-glass crystalline silicon component. The frame, interlayer structure and junction box can be packaged according to the conventional packaging process in the field.

[0066] The floating double-glass crystalline silicon module provided by the present invention is provided with a thermal management functional material layer on the double-glass crystalline silicon module body, specifically a specific hydrophilic functional film layer and a hydrophobic functional film layer, to construct a hydrophilic-hydrophobic double-layer functional film layer, wherein the hydrophilic film layer can serve as a water storage area to store evaporated water vapor rich in anions and cations, which can significantly enhance the barrier ability of the module packaging material to anions and cations, and weaken the module efficiency decline caused by pn junction leakage; in addition, the hydrophilic functional layer with water storage function can serve as a cold source to further cool the module and further reduce the operating temperature of the photovoltaic module through phase change heat transfer; at the same time, the hydrophobic film layer can significantly improve the parasitic problem of plankton on the surface of the module, improve the acid resistance, alkali resistance, aging resistance, sterilization, and mildew resistance of the back glass, improve weather resistance, and extend service life. By providing the above-mentioned hydrophilic-hydrophobic double-layer functional film layer, the present invention can effectively solve the problems faced by the double-glass crystalline silicon modules in the use of floating photovoltaic in the prior art mentioned above.

[0067] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0068] Example 1

[0069] Floating double-glass silicon modules such as Figure 1-2 As shown, it includes: a frame structure 1, an interlayer structure 2 and a junction box 3.

[0070] in,

[0071] The frame structure 1 is an aluminum alloy frame, which is encapsulated around the interlayer structure 2.

[0072] The interlayer structure 2 includes: a double-glass crystalline silicon component body 2-1 and a thermal management functional material layer 2-2.

[0073] The double-glass crystalline silicon module body 2-1 includes the following laminated components: a tempered glass panel 2-1-1 (thickness 3.2 mm), a first EVA film layer 2-1-2 (thickness 0.25 mm), a cell 2-1-3 (single cell size is the conventional size of 182 mm × 182 mm), a second EVA film layer 2-1-4 (thickness 0.25 mm) and a tempered glass back panel 2-1-5 (thickness 3.2 mm), as shown in FIG. Figure 4-5 shown.

[0074] The thermal management functional material layer 2-2 comprises a laminated composite of a hydrophilic SiO2 film layer 2-2-1 (300 nm thick) and a hydrophobic SiO2 film layer 2-2-2 (30 nm thick). The thermal management functional material layer 2-2 has a pore size greater than 75 nm and a porosity of 90%. These two layers are sequentially grown on the glass backplane 2-1-5 of the dual-glass crystalline silicon module body 2-1 via a sol-gel method and then heat-treated at 500°C for 100 minutes to form a bonded contact at the interface.

[0075] The junction box 3 is mounted on the glass back plate 2-1-5 of the double-glass crystalline silicon module body 2-1.

[0076] Example 2

[0077] Floating double-glass silicon modules such as Figure 1-2 As shown, it includes: a frame structure 1, an interlayer structure 2 and a junction box 3.

[0078] in,

[0079] The frame structure 1 is an aluminum alloy frame, which is encapsulated around the interlayer structure 2.

[0080] The interlayer structure 2 includes: a double-glass crystalline silicon component body 2-1 and a thermal management functional material layer 2-2.

[0081] The double-glass crystalline silicon module body 2-1 includes the following laminated components: a tempered glass panel 2-1-1, a first EVA film layer 2-1-2, a battery cell 2-1-3, a second EVA film layer 2-1-4 and a tempered glass back panel 2-1-5. The dimensions of each layer are the same as those in Example 1. Figure 4-5 shown.

[0082] The thermal management functional material layer 2-2 comprises a laminated composite of a hydrophilic SiO2 film layer 2-2-1 (350 nm thick) and a hydrophobic SiO2 film layer 2-2-2 (20 nm thick). The thermal management functional material layer 2-2 has a pore size greater than 75 nm and a porosity of 90%. These two layers are sequentially grown on the glass backplane 2-1-5 of the dual-glass crystalline silicon module body 2-1 via a sol-gel method and then heat-treated at 500°C for 120 minutes to form a bonded contact at the interface.

[0083] The junction box 3 is mounted on the glass back plate 2-1-5 of the double-glass crystalline silicon module body 2-1.

[0084] Example 3

[0085] Floating double-glass silicon modules such as Figure 1-2 As shown, it includes: a frame structure 1, an interlayer structure 2 and a junction box 3.

[0086] in,

[0087] The frame structure 1 is an aluminum alloy frame, which is encapsulated around the interlayer structure 2.

[0088] The interlayer structure 2 includes: a double-glass crystalline silicon component body 2-1 and a thermal management functional material layer 2-2.

[0089] The double-glass crystalline silicon module body 2-1 includes the following laminated components: a tempered glass panel 2-1-1, a first EVA film layer 2-1-2, a battery cell 2-1-3, a second EVA film layer 2-1-4 and a tempered glass back panel 2-1-5. The dimensions of each layer are the same as those in Example 1. Figure 4-5 shown.

[0090] The thermal management functional material layer 2-2 comprises a laminated composite of a hydrophilic SiO2 film layer 2-2-1 (400 nm thick) and a hydrophobic SiO2 film layer 2-2-2 (40 nm thick). The thermal management functional material layer 2-2 has a pore size greater than 75 nm and a porosity of 90%. These two layers are sequentially grown on the glass backplane 2-1-5 of the dual-glass crystalline silicon module body 2-1 via a sol-gel method and then heat-treated at 500°C for 120 minutes to form a bonded contact at the interface.

[0091] The junction box 3 is mounted on the glass back plate 2-1-5 of the double-glass crystalline silicon module body 2-1.

[0092] Comparative Example 1

[0093] The process is carried out in accordance with Example 1, except that the thermal management functional material layer 2 - 2 is not included.

[0094] Example 4: Performance Test

[0095] The performance of the floating double-glass crystalline silicon modules obtained in Examples 1-3 and Comparative Example 1 was tested, specifically the operating temperature of the cell and the solar transmittance of the back panel glass. The results are shown in Table 1.

[0096] Testing the cell operating temperature can assess the thermal management capabilities of the SiO2 double-layer structure for crystalline silicon modules; this test can be obtained by imaging the module under operating conditions using a thermal imager. Testing the backplane glass's solar transmittance can assess the SiO2 double-layer's blocking effect on anions, cations, and planktonic microorganisms. Specifically, after three months of operation, the double-glass crystalline silicon module is disassembled and the solar transmittance of the glass backplane (in this example, the glass backplane with the SiO2 double-layer structure is tested) is tested.

[0097] Table 1: Test results of Examples 1-3 and Comparative Example 1

[0098] Battery operating temperature, ℃ Transmittance of glass back panel after 3 months of operation, % Comparative Example 1 27.6 88.4 Example 1 26.8 89.5 Example 2 26.2 89.3 Example 3 27.0 89.0

[0099] It can be seen from the test results in Table 1 that the double-glass crystalline silicon module provided by the present invention can effectively reduce the temperature coefficient and improve the ability to absorb sunlight.

[0100] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal description of the claims, or if they include equivalent structural elements that are not substantially different from the literal description of the claims, then these other embodiments should also be included in the scope of the claims.

Claims

1. A floating double-glass silicon module, characterized in that: include: A frame structure (1), an interlayer structure (2) and a junction box (3); wherein the frame structure (1) is arranged around the interlayer structure (2) to reinforce the interlayer structure (2), and the junction box (3) is installed on the interlayer structure (2); in, The interlayer structure (2) comprises: a double-glass crystalline silicon component body (2-1) and a thermal management functional material layer (2-2); The thermal management functional material layer (2-2) comprises: a hydrophilic functional film layer (2-2-1) and a hydrophobic functional film layer (2-2-2); wherein the hydrophilic functional film layer (2-2-1) is in direct contact with the double-glass crystalline silicon component body (2-1); The thermal management functional material layer (2-2) has a porous structure; The thickness of the thermal management functional material layer (2-2) is 210-550 nm.

2. The floating double-glass silicon module according to claim 1, characterized in that: The hydrophilic functional film layer (2-2-1) is a hydrophilic SiO2 film layer, a hydrophilic MgO film layer, a hydrophilic TiO2 film layer, a hydrophilic Al2O3 film layer or a hydrophilic ZrO2 film layer; The hydrophobic functional film layer (2-2-2) is a hydrophobic SiO2 film layer, a hydrophobic MgO film layer, a hydrophobic TiO2 film layer, a hydrophobic Al2O3 film layer or a hydrophobic ZrO2 film layer.

3. The floating double-glass silicon module according to claim 1, characterized in that: The hydrophilic functional film layer (2-2-1) is a hydrophilic SiO2 film layer; The hydrophobic functional film layer (2-2-2) is a hydrophobic SiO2 film layer.

4. The floating double-glass silicon module according to claim 1, characterized in that: The porosity of the thermal management functional material layer (2-2) is 85% to 99.8%.

5. The floating double-glass silicon module according to claim 1, characterized in that: The pore size of the thermal management functional material layer (2-2) is greater than 75 nm.

6. The floating double-glass silicon module according to claim 1, characterized in that: The thickness of the hydrophilic functional membrane layer (2-2-1) is 200-500 nm; The thickness of the hydrophobic functional film layer (2-2-2) is 10-50 nm.

7. The floating double-glass silicon module according to claim 1, characterized in that: The double-glass silicon component body (2-1) comprises the following laminated components: Glass panel (2-1-1); A first encapsulation film layer (2-1-2); Battery cell (2-1-3); A second encapsulation film layer (2-1-4); Glass back panel (2-1-5).

8. The floating double-glass silicon module according to claim 7, characterized in that: The junction box (3) is mounted on the glass back plate (2-1-5) of the double-glass silicon component body (2-1); or The junction box (3) is installed on the hydrophobic functional membrane layer (2-2-2) in the interlayer structure (2).

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