Photovoltaic glass electro-optic roller, photovoltaic glass manufacturing method and wear-resistant photovoltaic glass

Abstract

An electro-optic roller for photovoltaic glass, the surface of which is provided with a pattern structure that is evenly arranged and concave-convex, the plane spacing between two adjacent pattern structures is 0.001mm to 0.03mm, and the depth of the pattern structure is 80μm to 130μm. When coating the glass, an electro-optic roller with a plane spacing between two adjacent pattern structures of 0.001mm to 0.03mm and a pattern structure depth of 80μm to 130μm is used, so that the glass surface is coated with a pattern structure that is the same as the surface of the electro-optic roller. The glass with the pattern structure has a shallower and smoother pattern depth, a higher density of pattern concave points, and a smaller pattern spacing, so that it is more wear-resistant. In addition, during the glass coating process, the outlet angle of the solution leveling tooling air curtain machine in the roller coater is adjusted to 30 degrees, so that the outflowing anti-reflection film layer will be smoother and have better wear resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic glass, and in particular relates to an electro-optic roller of photovoltaic glass, a method for manufacturing photovoltaic glass, and wear-resistant photovoltaic glass. Background Art

[0002] The global solar photovoltaic market is developing rapidly. With the accumulation and advancement of technology, people have never stopped pursuing high-power and high-performance solar cells. At the same time, solar panels are divided into different types to meet different customer needs in different usage environments. As a result, higher requirements are also placed on photovoltaic glass companies. Solar panel companies have put forward requirements for high-wear-resistant AR-coated photovoltaic glass front panels to photovoltaic glass companies.

[0003] When AR tempered coating is applied, the solution first flows into the middle of the electro-optic roller and the rubber roller, and the solution is intercepted by the four-corner mesh concave patterns on the electro-optic roller body and evenly applied to the rubber roller in the form of dots. Figures 1 to 3 The figure shows a 60-mesh electro-optic roller 10' generally used in conventional AR. The patterns on the pattern structure 11' in the conventional 60-mesh electro-optic roller 10' are spaced 0.05 mm apart (set as L1'), the pattern gap is 0.423 mm (set as L2'), and the pattern depth is 130-180 μm (set as H1'). The density of this pattern structure is sparse and the angle is large and deep. The interval between each pattern is large. When coating, the solution point height applied to the rubber roller is high and the density is sparse. In this way, the film layer is prone to wiredrawing defects. After coating, the film layer is uneven (can only be controlled within ±10 nm), the surface is not smooth, the wear resistance is poor, and the transmittance is only 93.8%-94%.

[0004] When using a traditional 80-mesh electro-optical roller, there is a 0.05mm gap between the patterns, and the pattern gap becomes smaller. To ensure the same film thickness during coating, the pattern depth must be increased to 140-190μm, so the surface is not smooth and the wear resistance is also poor.

[0005] In the process of anti-reflection coating on glass, the air outlet angle of the solution leveling tooling air curtain machine in the roller coater is generally 45 degrees, and the anti-reflection film layer flowing out at this angle will be thicker. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide an electro-optical roller for photovoltaic glass, a method for manufacturing photovoltaic glass, and wear-resistant photovoltaic glass, aiming to solve the problem that the existing coated photovoltaic glass is not wear-resistant.

[0007] To achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide an electro-optical roller for photovoltaic glass, the side surface of which is provided with a uniformly arranged and concave-convex pattern structure, and the spacing between two adjacent pattern structures along the surface of the electro-optical roller is in the range of 0.001 to 0.03 mm; the depth of the pattern structure is in the range of 80 μm to 130 μm.

[0008] In one embodiment, the plane interval between two adjacent pattern structures is 0.01 mm.

[0009] In one embodiment, the gap between the pattern structures is 0.317 mm.

[0010] In one embodiment, the depth of the pattern structure is 100 μm.

[0011] In one embodiment, the pattern structure includes a circular portion located at the lower end and a square portion located at the upper end of the circular portion and connected to the circular portion.

[0012] In one embodiment, the surface of the electro-optical roller of the photovoltaic glass is coated with a silicon dioxide layer.

[0013] In one embodiment, the silicon dioxide layer has a refractive index of 1.3.

[0014] The present invention also provides a method for manufacturing photovoltaic glass, using the electro-optic roller of the photovoltaic glass, comprising the following steps:

[0015] S10: providing a glass substrate;

[0016] S20: cutting the glass substrate into a desired size;

[0017] S30: preheating the cut glass substrate;

[0018] S40: adjusting the outlet angle of the solution leveling tooling air curtain in the roller coater to 30 degrees, sending the preheated glass substrate into the roller coater, the roller coater is provided with the electro-optic roller, the electro-optic roller intercepts the anti-reflection film solution in the roller coater and applies it to the rubber roller in the roller coater in a dotted shape, the rubber roller then evenly applies the anti-reflection film solution applied on the surface to the surface of the glass substrate, and forms the pattern structure on the surface of the glass substrate;

[0019] S50: sending the glass substrate coated with the anti-reflection film solution into a first curing furnace for curing, so that the anti-reflection film solution on the glass substrate is cured to form an anti-reflection film;

[0020] S60: After the glass substrate with the anti-reflection film is cooled, it is sent into a tempering furnace for tempering.

[0021] The present invention also provides a wear-resistant photovoltaic glass manufactured using the manufacturing method of the photovoltaic glass, wherein the surface of the wear-resistant photovoltaic glass is coated with the pattern structure.

[0022] In one embodiment, the transmittance of the wear-resistant photovoltaic glass is greater than or equal to 93.9%.

[0023] The beneficial effect of the present application is that: when coating the glass, an electro-optic roller with a plane spacing of 0.001mm to 0.03mm between two adjacent pattern structures and a pattern structure depth of 80μm to 130μm is used, so that the glass surface is coated with a pattern structure identical to the electro-optic roller surface, and the glass with the pattern structure has a shallower and smoother pattern depth, a higher density of pattern concave points, and a smaller pattern spacing, thereby being more wear-resistant. In addition, during the glass coating process, the outlet angle of the solution leveling tooling air curtain machine in the roller coater is adjusted to 30 degrees, so that the outflowing anti-reflection film layer will be smoother and have better wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 This is a schematic diagram of the structure of a traditional 60-mesh electro-optic roller;

[0026] Figure 2 This is a schematic diagram of the pattern structure on the surface of a traditional 60-mesh electro-optic roller;

[0027] Figure 3 yes Figure 2 Cross-section at the middle BB;

[0028] Figure 4 It is a structural schematic diagram of the electro-optic roller provided in the present application;

[0029] Figure 5 It is a schematic diagram of the pattern structure on the surface of the electro-optic roller provided in this application;

[0030] Figure 6 yes Figure 5 Cross-sectional view at CC.

[0031] Among them, the reference numerals in the figure are:

[0032] 10', 60 mesh electro-optic roller 11', pattern structure

[0033] 10. Electro-optic roller 11. Pattern structure

[0034] 111. circular portion 112. square portion. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] See also Figures 4 to 6 The embodiment of the present application provides an electro-optic roller 10 for photovoltaic glass. Optionally, the electro-optic roller 10 is an 80-mesh electro-optic roller. Compared with a 60-mesh electro-optic roller, an 80-mesh electro-optic roller has a denser pattern and smoother geometric parameters. The solution dots distributed to the coating roller by the 80-mesh electro-optic roller are shorter, flatter and denser, thereby eliminating defects such as film surface drawing. Of course, the electro-optic roller 10 can also be 100-mesh or 120-mesh.

[0040] The side surface of the electro-optic roller is provided with a pattern structure 11 that is evenly arranged and concave-convex. The plane spacing between two adjacent pattern structures 11 is 0.001mm to 0.03mm. Optionally, the plane spacing between two adjacent pattern structures 11 can be 0.001mm, 0.002mm, 0.003mm, 0.004mm, 0.005mm, 0.006mm, 0.007mm, 0.008mm, 0.009mm, 0.01mm, 0.02mm, 0.03mm. The spacing between two adjacent pattern structures 11 along the surface of the electro-optic roller is set to L1, then L1 is 0.001mm to 0.03mm. The depth of the pattern structure is 80μm to 130μm. Optionally, the depth of the pattern structure can be 80μm, 90μm, 100μm, 110μm, 120μm, 130μm. The depth of the pattern structure is set to H1, and H1 is 80μm to 130μm. By reducing the plane interval between two adjacent pattern structures 11 from the traditional 0.05mm to 0.001mm to 0.03mm, and reducing the depth of the pattern structure 11 from the traditional 140μm to 190μm to 80μm to 130μm, the pattern depth of the photovoltaic glass surface coated by the electro-optic roller 10 is shallower and smoother, the density of the pattern concave points is greater, the pattern interval is smaller, and it is more wear-resistant.

[0041] In one embodiment, the plane interval between two adjacent pattern structures 11 is 0.01 mm. The density of pattern concave points on the photovoltaic glass coated with this interval is higher and the pattern interval is smaller.

[0042] In one embodiment, the depth of the pattern structure is 100 μm. When the depth of the pattern structure 11 is preferably 100 μm and the plane interval between two adjacent pattern structures 11 is preferably 0.01 mm, the wear resistance of the coated photovoltaic glass is optimal.

[0043] In one embodiment, the gap of the pattern structure 11 is 0.317 mm. The gap of the pattern structure 11 is set to L2, which is reduced from the larger gap of the traditional pattern structure 11 to 0.317 mm, so that the photovoltaic glass surface coated by the electro-optical roller 10 has more and denser patterns.

[0044] In one embodiment, the pattern structure 11 includes a circular portion 111 at the lower end and a square portion 112 at the upper end of the circular portion and connected to the circular portion. The pattern on the photovoltaic glass brought out by this pattern structure is in the shape of a lower circle with an upper circle. The traditional electro-optic roller pattern is a four-cornered rhombus. When the anti-reflection film is plated, the pattern brought out is in the shape of a lower square with an upper point. The current electro-optic roller 10 uses a pattern with a lower circle and an upper part. When the anti-reflection film is plated, the pattern brought out is in the shape of a lower circle with an upper part. Under the same volume, the difference between the highest and lowest peak values ​​of the pattern structure in the shape of a lower circle with an upper part is the smallest, and the film surface formed by the coating is more uniform.

[0045] The pattern structure 11 on the electro-optical roller 10 adopts a concave pattern and an etching method to corrode it into a corresponding convex pattern. After vacuum quenching, the overall pattern hardness is increased from HB225 to HR60. After the overall rigidity strength meets the requirements, it is finely ground on an engraving machine to obtain a pattern gap of less than 0.001mm to 0.03mm, and the pattern depth is shallow (80-130μm). After the photovoltaic glass is coated with the electro-optical roller 10, the surface has fewer wire drawing defects, the film thickness is controlled at 120±5nm, the transmittance increases steadily (≥93.9%), the surface is smoother and more wear-resistant.

[0046] In one embodiment, the surface of the electro-optic roller is coated with a silicon dioxide layer, so that the silicon dioxide layer is coated on the surface of the photovoltaic glass to form an anti-reflection layer. Optionally, the silicon dioxide layer is a porous silicon dioxide film, and light can directly pass through the through holes of the silicon dioxide film, which can greatly increase the transmittance of light passing through the anti-reflection layer, thereby increasing the transmittance of the photovoltaic glass, and further improving the photoelectric conversion power of the solar photovoltaic glass assembly. The refractive index of the silicon dioxide layer is 1.3.

[0047] The present invention also provides a method for manufacturing photovoltaic glass, using an electro-optic roller of photovoltaic glass, comprising the following steps:

[0048] S10: providing a glass substrate;

[0049] S20: cutting the glass substrate into a required size;

[0050] S30: preheating the cut glass substrate;

[0051] S40: the outlet angle of the solution leveling tooling air curtain in the roller coater is adjusted to 30 degrees, and the preheated glass substrate is sent into the roller coater. The roller coater is provided with an electro-optic roller 10, and the electro-optic roller 10 intercepts the anti-reflection film solution in the roller coater and applies it to the rubber roller in the roller coater in a dotted shape. The rubber roller then evenly applies the anti-reflection film solution applied on the surface to the surface of the glass substrate, and forms a pattern structure 11 on the surface of the glass substrate;

[0052] S50: sending the glass substrate coated with the anti-reflection film solution into a first curing furnace for curing, so that the anti-reflection film solution on the glass substrate is cured to form an anti-reflection film;

[0053] S60: After the glass substrate with the anti-reflection film is cooled, it is sent to the tempering furnace for tempering. The production of the coated photovoltaic glass is completed.

[0054] It should be noted that the outlet angle of the solution leveling tooling air curtain machine was adjusted from the original 45 degrees to 30 degrees. The film layer flowing out at this angle will be smoother and have better wear resistance.

[0055] The present invention also provides a wear-resistant photovoltaic glass made by the method for making photovoltaic glass, wherein the surface of the wear-resistant photovoltaic glass is coated with a pattern structure 11. The wear-resistant performance of the coated photovoltaic glass with the pattern structure 11 is improved, and the transmittance of the wear-resistant photovoltaic glass is ≥93.9%.

[0056] The test data of wear-resistant photovoltaic glass is shown in the table:

[0057]

[0058]

[0059] It can be seen from the table that the larger the electro-optic roller pattern interval and the deeper the electro-optic roller pattern depth, the higher the glass transmittance attenuation rate after the glass wear test, which means that the anti-reflection film layer has more losses after the wear test, resulting in a significant decrease in transmittance, which also reflects that the anti-reflection film layer is not wear-resistant. On the contrary, the smaller the electro-optic roller pattern interval and the shallower the electro-optic roller pattern depth, the lower the glass transmittance attenuation rate after the glass wear test, which means that the anti-reflection film layer has less losses after the wear test, resulting in a slight decrease in transmittance, which also reflects that the anti-reflection film layer is more wear-resistant. When the electro-optic roller pattern interval is 0.01mm and the pattern depth is 100μm, the overall optimal is achieved, because when the electro-optic roller pattern interval is less than 0.01mm, the processing cost will increase greatly.

[0060] Glass wear test: Use cylindrical felt as friction material, with a thickness of 10mm and a diameter of 30mm. The friction surface of the felt is perpendicular to the side surface of the glass. Linear friction is performed for 40 strokes, with a frequency of 60 strokes per minute, one round trip as one stroke, a stroke length of 100mm, and a force of 15N acting vertically on the sample surface through the felt. If the photovoltaic transmittance decreases by more than 1% after the test, it means that the wear resistance of the glass does not meet the requirements.

[0061] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electro-optic roller for photovoltaic glass, characterized in that: The side surface of the electro-optical roller is provided with a uniformly arranged and concave-convex pattern structure, and the spacing between two adjacent pattern structures along the surface of the electro-optical roller is in the range of 0.001 to 0.03 mm; the depth of the pattern structure is in the range of 80 μm to 130 μm; the pattern structure is a corresponding convex pattern made by etching a concave pattern.

2. The electro-optic roller of photovoltaic glass according to claim 1, characterized in that: The plane interval between two adjacent pattern structures is 0.01 mm.

3. The electro-optic roller of photovoltaic glass according to claim 1 or 2, characterized in that: The depth of the pattern structure is 100 μm.

4. The electro-optic roller of photovoltaic glass according to claim 3, characterized in that: The gap between the pattern structures is 0.317 mm.

5. The electro-optic roller of photovoltaic glass according to claim 1 or 2, characterized in that: The pattern structure includes a circular portion located at the lower end and a square portion located at the upper end of the circular portion and connected to the circular portion.

6. The electro-optic roller of photovoltaic glass according to claim 1, characterized in that: The surface of the electro-optic roller is coated with a silicon dioxide layer.

7. The electro-optic roller of photovoltaic glass according to claim 6, characterized in that: The refractive index of the silicon dioxide layer is 1.

3.

8. A method for manufacturing photovoltaic glass, characterized in that: The electro-optic roller using the photovoltaic glass as claimed in any one of claims 1 to 7 comprises the following steps: S10: providing a glass substrate; S20: cutting the glass substrate into a desired size; S30: preheating the cut glass substrate; S40: adjusting the air outlet angle of the solution leveling tooling air curtain in the roller coater to 30 degrees, sending the preheated glass substrate into the roller coater, the roller coater is provided with the electro-optic roller, the electro-optic roller intercepts the anti-reflection film solution in the roller coater and applies it to the rubber roller in the roller coater in a dotted shape, the rubber roller then evenly applies the anti-reflection film solution applied on the surface to the surface of the glass substrate, and forms the pattern structure on the surface of the glass substrate; S50: sending the glass substrate coated with the anti-reflection film solution into a first curing furnace for curing, so that the anti-reflection film solution on the glass substrate is cured to form an anti-reflection film; S60: After the glass substrate with the anti-reflection film is cooled, it is sent into a tempering furnace for tempering.

9. A wear-resistant photovoltaic glass manufactured using the method for manufacturing photovoltaic glass according to claim 8, characterized in that: The surface of the wear-resistant photovoltaic glass is coated with a pattern structure as described in any one of claims 1 to 7.

10. The wear-resistant photovoltaic glass according to claim 9, characterized in that: The transmittance of the wear-resistant photovoltaic glass is greater than or equal to 93.9%.

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