Ultra-thin high-transmittance photovoltaic glass

Abstract

The utility model relates to photovoltaic glass technical field discloses a kind of ultra-thin high light transmission photovoltaic glass, including glass substrate layer, the glass substrate layer includes glass base sheet and printing silk screen, the printing silk screen is set to the bottom side of the glass base sheet, the upper and lower side of the glass substrate layer is provided with antireflection coating layer, the antireflection coating layer far from the outer side of the glass substrate layer is provided with scratch-resistant layer. By laminated structure collocation, its glass substrate layer provides basic support for photovoltaic function realization, the antireflection coating layer of upper and lower side can reduce light reflection loss, outer side dustproof layer can reduce the shielding of dust to light, both synergies greatly improve light transmittance, help photovoltaic module photoelectric conversion efficiency to improve;Scratch-resistant layer of antireflection coating layer outer side can resist friction scratch, avoid internal structure damage, the silicone sealant of four peripheral edges can block water vapor, impurity invasion effectively, effectively enhance product weather resistance and structural stability, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic glass technology, specifically to an ultra-thin, high-transparency photovoltaic glass. Background Technology

[0002] In the field of photovoltaic technology, the light transmittance, mechanical strength, weather resistance, and ease of use of photovoltaic glass directly affect the photoelectric conversion efficiency and service life of the module.

[0003] The light transmittance of existing photovoltaic glass is limited. Traditional glass surfaces are prone to light reflection and loss, and dust easily accumulates on the surface during long-term use, further blocking light. This results in low utilization of sunlight by photovoltaic modules, which restricts photoelectric conversion efficiency.

[0004] The surface has weak scratch resistance and is easily damaged by friction and scratches during transportation, installation and outdoor use, which affects the light transmission performance. At the same time, the edge sealing effect is poor, and moisture and impurities can easily penetrate into the interior, leading to interlayer delamination or performance degradation and shortening the service life of the component.

[0005] Some products are quite thick, which increases the difficulty of transportation and installation, and the surface is prone to dust accumulation, requiring frequent cleaning and increasing maintenance costs. In addition, the conductive path structure of some photovoltaic glass is not stable enough, making it difficult to ensure the long-term reliable realization of photovoltaic functions. Utility Model Content

[0006] The purpose of this invention is to provide an ultra-thin, high-transmittance photovoltaic glass to address the problems of limited light transmittance due to surface reflection loss and dust accumulation, low photoelectric conversion efficiency, weak scratch resistance, and poor edge sealing leading to impaired light transmission and shortened lifespan in existing photovoltaic glass.

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution: An ultrathin, high-transparency photovoltaic glass includes a glass substrate layer, which comprises a glass substrate sheet and a printing screen. The printing screen is disposed on the bottom side of the glass substrate sheet. Anti-reflective coating layers are disposed on the upper and lower sides of the glass substrate layer. An anti-scratch layer is disposed on the outer side of the anti-reflective coating layer away from the glass substrate layer. A dustproof layer is disposed on the outer side of the anti-scratch layer away from the anti-reflective coating layer. Silicone sealant surrounds the edges of the dustproof layer, the glass substrate layer, the anti-scratch layer, and the anti-reflective coating layer.

[0008] Furthermore, the glass substrate includes a carrier frame, an embedded stress layer, and embossed areas. The inner ring of the carrier frame is fitted around the outer ring of the embedded stress layer, and the embossed areas are located at the four corners of the carrier frame.

[0009] Furthermore, the embedded stress layer is formed by an ion exchange process, and the embedded stress layer is made of ultra-white low-iron glass.

[0010] Furthermore, the carrier frame is made of high-aluminosilicate glass, and the inner ring of the carrier frame and the outer ring of the embedded stress layer are seamlessly connected by high-temperature fusion. The bending strength is far greater than that of ordinary soda-lime-silicon glass, which can provide edge support for the overall structure and prevent the ultra-thin glass from breaking at the edges during handling and installation.

[0011] Furthermore, the printing screen is formed by screen printing, and its coating is made by mixing ink with titanium dioxide and lithopone, which can reflect scattered light that is not absorbed by the photovoltaic cell back to the surface of the cell, thereby improving the photoelectric conversion efficiency.

[0012] Furthermore, the antireflective coating layer is a multilayer composite film structure, consisting of an Al2O3 coating, a SiO2 coating, a TiO2 coating, and another SiO2 coating, arranged sequentially from the glass substrate layer outwards. The antireflective coating layer is prepared by physical vapor deposition.

[0013] Furthermore, the scratch-resistant layer is a SiO2-TiO2 composite coating, which can improve the adhesion and chemical stability of the coating and the anti-reflective coating layer, while the TiO2 component can significantly improve the hardness of the coating.

[0014] Furthermore, the dustproof layer is a superhydrophilic TiO2 coating or a fluorinated resin coating. Under ultraviolet light, the coating will produce a photocatalytic effect, decomposing the organic stains attached to the surface. At the same time, its superhydrophilic properties allow rainwater to form a water film on the surface, washing away inorganic stains such as dust and sand, and preventing stains from accumulating and blocking light.

[0015] Compared with the prior art, this utility model provides an ultra-thin, high-transparency photovoltaic glass, which has the following beneficial effects: This ultra-thin, high-transparency photovoltaic glass utilizes a layered structure. The glass substrate layer provides the foundation for photovoltaic functionality, while the upper and lower anti-reflective coatings reduce light reflection loss. The outer dustproof layer minimizes dust obstruction, and together they significantly improve light transmittance, boosting the photovoltaic module's photoelectric conversion efficiency. The scratch-resistant layer on the outer side of the anti-reflective coating resists friction and scratches, preventing damage to the internal structure. The silicone sealant around the edges effectively prevents moisture and impurities from entering, enhancing the product's weather resistance and structural stability, and extending its lifespan. Simultaneously, the ultra-thin design facilitates transportation and installation, the dustproof layer reduces cleaning and maintenance frequency and costs, and the printed screen on the bottom of the glass substrate layer stably constructs conductive paths, ensuring reliable photovoltaic functionality. Overall, it balances high-efficiency power generation, durable protection, and ease of use. Attached Figure Description

[0016] Figure 1A three-dimensional view of the overall structure of this utility model is shown below. Figure 2 A three-dimensional diagram showing the structure between the dustproof layer, silicone sealant, and glass substrate layer of this utility model; Figure 3 For practical purposes Figure 2 Enlarged diagram A of the structure; Figure 4 A three-dimensional image showing the overall chamfered shape of the four corners of this practical photovoltaic glass; Figure 5 This is a three-dimensional view of the structure of the glass substrate layer in this utility model; Figure 6 A detailed three-dimensional diagram illustrating the structure of this practical glass substrate is provided. Figure 7 A three-dimensional diagram showing the structural layers of the glass substrate in this practical application.

[0017] In the diagram: 1. Dustproof layer; 2. Silicone sealant; 3. Glass substrate layer; 31. Glass substrate; 311. Carrier frame; 312. Embedded stress layer; 313. Embossed area; 32. Printed screen; 4. Scratch-resistant layer; 5. Anti-reflective coating layer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1:

[0019] like Figures 1-7 As shown, an ultra-thin high-transmittance photovoltaic glass includes a glass substrate layer 3, which includes a glass substrate 31 and a printing screen 32. The printing screen 32 is disposed on the bottom side of the glass substrate 31. This position design allows the printing layer to avoid the front light-receiving area, so as not to block the incident light and to efficiently reflect the back scattered light. Anti-reflection coating layers 5 are provided on the upper and lower sides of the glass substrate layer 3. The double-sided anti-reflection design maximizes the reduction of light reflection loss on the glass surface and solves the problem of insufficient light transmittance of traditional single-sided coating. An anti-scratch layer 4 is provided on the outer side of the anti-reflective coating layer 5 away from the glass substrate layer 3, forming an "anti-reflective protective barrier" to prevent the coating layer from being scratched during outdoor use or cleaning. A dustproof layer 1 is provided on the outer side of the anti-scratch layer 4, away from the anti-reflective coating layer 5, to reduce the impact of dust and stains on light transmission through the anti-fouling function; The edges of the dustproof layer 1, glass substrate layer 3, scratch-resistant layer 4 and anti-reflective coating layer 5 are surrounded by silicone sealant 2. The sealant is applied using a continuous coating process to form a closed-loop protection, which can not only prevent water vapor and sand from penetrating into the interlayer and causing structural failure, but also buffer the stress generated by the thermal expansion and contraction of each layer. like Figure 5 and Figure 6 As shown, the glass substrate 31 includes a carrier frame 311, an embedded stress layer 312, and an embossed area 313. The inner ring of the carrier frame 311 is fitted around the outer ring of the embedded stress layer 312. The embossed area 313 is located at the four corners of the carrier frame 311. The embedded stress layer 312 is formed by an ion exchange process and is made of ultra-white low-iron glass. The carrier frame 311 is made of high-alumina silica glass, which has a bending strength far exceeding that of ordinary soda-lime silica glass. It can provide edge support for the overall structure and prevent the ultra-thin glass from breaking at the edges during handling and installation. Furthermore, the inner ring of the carrier frame 311 and the outer ring of the embedded stress layer 312 are seamlessly connected by high-temperature welding, and the low iron content can reduce the absorption and loss of light inside the glass; in order to further enhance the impact resistance of the embedded stress layer 312, a stress layer is formed on its surface through ion exchange process. like Figure 5 As shown, the printing screen 32 is formed by screen printing, and its coating is made by mixing ink oil with titanium dioxide and lithopone. Among them, titanium dioxide and lithopone are the core reflective components, which can reflect the scattered light that is not absorbed by the photovoltaic cell back to the surface of the cell, thereby improving the photoelectric conversion efficiency. The ink oil serves as a bonding carrier to ensure the adhesion between the coating and the bottom side of the glass substrate 31. After printing, the coating needs to undergo a two-step curing process: first, it is cured in a constant temperature oven to allow the ink to initially cross-link and form, and then it is tempered in a tempering furnace along with the glass. This enhances the coating's weather resistance and prevents it from peeling off during subsequent processing. In addition, the coating of the printing screen 32 only covers the area on the bottom side of the glass substrate 31 corresponding to the gap between the solar cells, without obstructing the light-receiving surface of the solar cells, thus achieving a balance between "reflection enhancement" and "light transmission protection". Among them, the anti-reflection coating layer 5 is a multi-layer composite film structure, consisting of Al2O3 coating, SiO2 coating, TiO2 coating and SiO2 coating in sequence from the glass substrate layer 3 outwards. The anti-reflection coating layer 5 is prepared by physical vapor deposition process. Among them, the scratch-resistant layer 4 is a SiO2-TiO2 composite coating, which can improve the adhesion and chemical stability of the coating and the anti-reflective coating layer 5, while the TiO2 component can significantly improve the hardness of the coating. Example 2:

[0020] The coating is prepared by sol-gel method or PVD process, which will not reduce the light transmittance due to excessive thickness, and can form effective protection. In outdoor use scenarios, the scratch-resistant layer 4 can resist scratches caused by daily cleaning (such as wiping with a cloth) and wind and sand impact. At the same time, the coating has good weather resistance. After the ultraviolet aging test, the coating does not yellow or peel off, ensuring long-term protective effect. The dustproof layer 1 is a superhydrophilic TiO2 coating or a fluorinated resin coating, which is applied to the outside of the scratch-resistant layer 4 by the sol-gel method. Under ultraviolet light, the coating will produce a photocatalytic effect, decompose the organic stains attached to the surface, and at the same time, its superhydrophilic properties can allow rainwater to form a water film on the surface, washing away inorganic stains such as dust and sand, and preventing stains from accumulating and blocking light. Dustproof layer 1 may be selected from superhydrophilic TiO2 coating or fluorinated resin coating depending on the usage environment. If fluorinated resin coating is selected, it is prepared by spraying process. The coating has ultra-low surface energy, making it difficult for dirt such as dust and rainwater to adhere to the surface. Even if dirt does adhere, it can be removed by a slight breeze or rain, thus achieving "hydrophobic and anti-fouling". Both coatings have high light transmittance and strong adhesion to the scratch-resistant layer 4, and do not fail with long-term use.

Claims

1. An ultrathin, high-transmittance photovoltaic glass, comprising a glass substrate layer (3), characterized in that: The glass substrate layer (3) includes a glass substrate (31) and a printing screen (32). The printing screen (32) is disposed on the bottom side of the glass substrate (31) and only covers the area corresponding to the gap between the photovoltaic cells. The glass substrate layer (3) is provided with anti-reflection coating layers (5) on its upper and lower sides. The anti-reflection coating layer (5) is a multi-layer composite film structure, consisting of Al2O3 coating, SiO2 coating, TiO2 coating and SiO2 coating in sequence from the glass substrate layer (3) outwards. The anti-reflective coating layer (5) is provided with an anti-scratch layer (4) on the outer side away from the glass substrate layer (3). The anti-scratch layer (4) is provided with a dustproof layer (1) on the outer side away from the anti-reflective coating layer (5). The outer ring of the (1) is provided with silicone sealant (2). The dustproof layer (1), the glass substrate layer (3), the anti-scratch layer (4) and the anti-reflective coating layer (5) form a closed-loop sealing structure through the silicone sealant (2).

2. The ultra-thin high-transmittance photovoltaic glass according to claim 1, characterized in that: The glass substrate (31) includes a carrier frame (311), an embedded stress layer (312), and an embossed area (313). The inner ring of the carrier frame (311) is fitted around the outer ring of the embedded stress layer (312), and the embossed area (313) is located at the four corners of the carrier frame (311).

3. The ultra-thin high-transmittance photovoltaic glass according to claim 2, characterized in that: The embedded stress layer (312) is formed by ion exchange process, and the embedded stress layer (312) is made of ultra-white low iron glass.

4. The ultra-thin high-transmittance photovoltaic glass according to claim 2, characterized in that: The carrier frame (311) is made of high aluminosilicate glass, and the inner ring of the carrier frame (311) and the outer ring of the embedded stress layer (312) are seamlessly connected by high-temperature welding.

5. The ultrathin high-transmittance photovoltaic glass according to claim 1, characterized in that: The printing screen (32) is formed by printing on a mesh fabric.

6. The ultra-thin high-transmittance photovoltaic glass according to claim 1, characterized in that: The antireflective coating layer (5) is prepared by physical vapor deposition.

7. The ultrathin high-transmittance photovoltaic glass according to claim 1, characterized in that: The dustproof layer (1) is a superhydrophilic TiO2 coating or a fluorinated resin coating.

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