KR20250026984A - Solar cover glass for wall type, Solar panel including it and Manufacturing method - Google Patents

Abstract

The present invention relates to a solar cover glass, a solar panel including the same, and a manufacturing method thereof, and more particularly, to a solar cover glass attached to the front surface of a solar panel to protect the solar panel and increase the sunlight transmittance in a solar module, wherein a color portion is formed by simply partially color-printing a pigment of a predetermined color only on a convex portion to form a predetermined pattern on the solar cover glass, so that the color portion has a diffusion effect in which the color implementation area increases as the distance and the side direction increase, and a moire effect between the color portion and the transparent portion where the pigment is not printed, thereby implementing a predetermined color in the solar module and improving aesthetics, and wherein sunlight is incident through the transparent portion and the transmittance is maintained, and the reflection of the incident sunlight is limited by the color portion, thereby improving the power generation efficiency of the solar panel, and to a solar panel including the same, and a manufacturing method thereof, which is simple to manufacture and secures both excellent aesthetics and power generation efficiency.

Description

Solar cover glass for wall type, Solar panel including it and Manufacturing method thereof

The present invention relates to a solar cover glass, a solar panel including the same, and a manufacturing method thereof, and more particularly, to a solar cover glass attached to the front surface of a solar panel to protect the solar panel and increase the sunlight transmittance in a solar module, wherein a color portion is formed by simply partially applying a pigment of a predetermined color only to a convex portion so as to form a predetermined pattern on the solar cover glass, so that the color portion has a diffusion effect in which the color implementation area increases as the distance and the side direction increase, and a moire effect between the color portion and the transparent portion where the pigment is not printed, thereby implementing a predetermined color in the solar module and improving aesthetics, and wherein sunlight is incident through the transparent portion and the transmittance is maintained, and the reflection of the incident sunlight is limited by the color portion, thereby improving the power generation efficiency of the solar panel, and to a solar panel including the same, and a manufacturing method thereof, which is simple to manufacture and secures both excellent aesthetics and power generation efficiency.

Solar power generation is being intensively developed as an eco-friendly alternative energy that converts solar energy into electrical energy in modern times when the crisis of environmental pollution such as global warming is directly related to the issue of survival. It has already achieved considerable progress through various cases and countless studies, and ongoing research and development is being conducted to improve power generation efficiency and expand application cases.

In South Korea, the proportion of solar energy supplied is relatively low and the solar power generation system is insufficient. One of the biggest problems is that there is not enough and appropriate space to install solar modules. A method to solve this problem is to install solar modules on the exterior walls of buildings.

BIPV systems (building integrated photovoltaic systems) that apply solar power generation to buildings are solar power generation systems that use solar modules as building exterior materials. Active research and commercialization are underway. BIPV systems have considerable utility in terms of solving the problem of solar module installation space and maximizing power generation efficiency.

On the other hand, as a problem with the BIPV system, since the solar cells of the photovoltaic modules are generally black due to their light absorption rate, if black photovoltaic modules are installed on the exterior walls of a building, the aesthetics of the exterior of the building are seriously reduced, making the exterior of the building out of harmony with the surroundings. Therefore, it has the disadvantage of being an obstacle to applying the BIPV system to the exterior walls of buildings in terms of aesthetics.

As a solution to this problem, a method of coloring the solar cover glass attached to the front of the solar panel to add aesthetic appeal to the solar module is being developed, but there is a problem that the pigment reduces the solar transmittance, thereby lowering the efficiency of solar power generation, so its use is limited.

Therefore, there is a need to develop a technology that can maintain or improve the efficiency of solar power generation as a BIPV system, while improving aesthetics through color implementation, etc., and making production simple and convenient.

Republic of Korea Patent Publication No. 10-2020-0036528

The present invention has been created in consideration of the above-mentioned various problems of the prior art and to solve them, and the purpose of the present invention is to provide a solar cover glass attached to the front surface of a solar panel to protect the solar panel and increase the sunlight transmittance in a solar module, wherein a color portion is formed by simply partially applying a pigment of a predetermined color only to a convex portion so as to form a predetermined pattern on the solar cover glass, so that the color portion has a diffusion effect in which the color implementation area becomes wider the farther away and in the lateral direction, and a moire effect between the color portion and the transparent portion where the pigment is not printed, thereby implementing a predetermined color in the solar module and improving aesthetics, and solar light is incident through the transparent portion and the transmittance is maintained, while the reflection of the incident sunlight is limited by the color portion, thereby improving the power generation efficiency of the solar panel, a solar panel including the same, and a manufacturing method thereof, which are simple to manufacture and secure both excellent aesthetics and power generation efficiency.

The above objects and various advantages of the present invention will become more apparent to those skilled in the art from the preferred embodiments of the present invention.

The solar cover glass according to the present invention comprises: a light-incident surface exposed to the outside; a light-emitting surface facing a solar panel; and a printing layer on which a pigment of a predetermined color is printed on at least one surface of the light-incident surface or the light-emitting surface; wherein a plurality of convex portions and a plurality of concave portions are formed on at least one surface of the light-incident surface and the light-emitting surface, and the printing layer is characterized in that it is formed only on the convex portions.

A solar panel according to the present invention comprises: a back plate fixed to the exterior of a building; a solar panel bonded to one surface of the back plate; and a solar cover glass provided on an upper side of the solar panel; wherein the solar cover glass comprises: a light-incident surface exposed to the outside; a light-emitting surface facing the solar panel; and a printing layer on which a pigment of a predetermined color is printed on at least one surface of the light-incident surface or the light-emitting surface; wherein a plurality of convex portions and a plurality of concave portions are formed on at least one surface of the light-incident surface and the light-emitting surface, and the printing layer is characterized in that it is formed only on the convex portions.

The method for manufacturing a solar cover glass according to the present invention is characterized by including the steps of forming a plurality of convex portions and concave portions on at least one of a light incident surface and a light emitting surface of glass; a step of preparing a ceramic paint so that the ceramic paint can be applied only to the convex portions; a step of applying the ceramic paint only to the convex portions using the prepared ceramic paint; and a step of heat-treating the glass to which the ceramic paint is applied.

Specific details of other embodiments are included in the detailed description and drawings.

According to the color solar module of the present invention, the following effects can be obtained.

First, as a BIPV system, sunlight is incident through a transparent part where no pigment is printed, so the solar power generation efficiency can be increased by maintaining the solar transmittance but reducing the reflectivity.

Second, since the color portions are pigment-printed at predetermined intervals and patterns, the color diffusion effect is created when viewed from a distance and from the side, and the moire effect is created between the color portions and the transparent portions, so that the predetermined color is implemented throughout the solar module, thereby enhancing aesthetics.

Third, since color is simply applied to the convex portion only, production is simple and convenient, which maximizes production efficiency.

FIGS. 1 to 5 are cross-sectional views schematically showing the structure of a solar panel to which solar cover glass according to the first to fifth embodiments of the present invention is applied.
Figure 5 is a flow chart of a method for manufacturing solar cover glass according to the present invention.
FIG. 6 is a drawing illustrating an example of a method for implementing color of a solar cover glass according to an embodiment of the present invention.
Figure 7 is a photograph of a solar cover glass according to one embodiment of the present invention.

The above-described objects, features and advantages of the present invention will become more apparent through the following embodiments with reference to the accompanying drawings. The following specific structural and functional descriptions are merely exemplified for the purpose of explaining embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described in this specification.

Since embodiments according to the concept of the present invention can have various changes and can take various forms, specific embodiments are illustrated in the drawings and described in detail in the present specification. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, but should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

When it is said that a component is "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components in between. On the other hand, when it is said that a component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions used to describe the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

The terminology used herein is only used to describe particular embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. It should be understood that the terms "comprises" or "has" as used herein specify that there is a feature, number, step, operation, component, part, or combination thereof implemented, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms defined in commonly used dictionaries, such as those defined in common usage dictionaries, should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the attached drawings. The same reference numerals presented in each drawing represent the same components.

Meanwhile, in the following description, the light incident surface of the solar cover glass is described as the upper surface and the light emitting surface is described as the lower surface based on the direction in the drawing, but these directions should be interpreted only for the convenience of explanation.

[First embodiment]

FIG. 1 is a cross-sectional view schematically showing the structure of a solar panel to which a solar cover glass according to the first embodiment of the present invention is applied.

A solar cover glass for a panel according to one embodiment is applied to a solar panel (100), and the solar panel (100) includes a back plate (10) arranged on one side and fixed to a desired installation location on the exterior of a building, such as a wall or roof, a solar cell panel (30) arranged on the back plate (10), and a solar cover glass (40) according to one embodiment arranged on an upper side of the solar cell panel (30).

At this time, the solar cover glass (40) protects the solar panel (30) from external impact or foreign substances, and can preferably be formed of low-iron glass.

Drawing symbol 20 represents a bonding material for bonding a back plate (10) and a solar panel (30), and drawing symbol 21 represents a bonding material for a solar panel (30) and a cover glass (40). In addition, placing a solar panel on the back plate and placing a solar cover glass thereon utilizes a typical solar panel manufacturing process, and a detailed description thereof is omitted.

And, the solar cover glass (40) includes a light incident surface (41) and a light emitting surface (42).

The light emitting surface (42) is formed with a structure (hereinafter referred to as a ‘pattern portion’) in which a plurality of concave portions (44) and a plurality of convex portions (43) are alternately formed in a certain shape.

In addition, these uneven structures may have convex and concave portions arranged regularly to form a specific pattern, or the convex and concave portions may be arranged irregularly and alternately with different heights or widths, etc.

That is, the light emitting surface (42) of the solar cover glass (40) is formed as a rough structure (42; described below with the same drawing symbol as the light emitting surface) in which a plurality of concave portions (44) and a plurality of convex portions (43) are alternately formed.

And, a color layer (50) that implements color is formed on each convex portion (43).

The color layer (50) is intended to improve the aesthetics of the solar panel (100) by implementing a color effect. Depending on the user's choice, at least one paint having various colors can be formed on each of the plurality of convex portions (43) in consideration of harmony with surrounding buildings, etc.

Accordingly, when light transmitted through the convex portions (43) of the light emitting surface (42) having multiple concave portions (44) and convex portions (43) is diffused, the overall color of the solar panel (100) can be implemented with the color formed in the color layer (50).

The important point here is that the color layer (50) must be formed apart from the solar panel (30). Even though the color layer (50) and the solar panel (30) must be separated, when a person looks from a distance, the color layer (50) appears to spread over the solar panel (30), so that even with only a narrow color layer (50), the effect of a wide area being applied can be generated.

Meanwhile, the ceramic paint applied to the convex portion (43) contains ceramic, and when the paint is applied to the glass surface and dried, the paint is dried at a temperature reaching the melting point of glass, so that the ceramic component contained in the paint melts together with the glass surface and becomes one with the convex portion (43) of the light emitting surface (42), thereby maintaining the color for a long time and minimizing the problem of discoloration.

The above ceramic paint may contain titanium dioxide, 2-(2-butoxyacid)ethanol acetate, cadmium zinc sulfide, cobalt aluminate blue spinel, ethyl cellulose, alpha terpineol, etc., and various pigments may be added as needed.

Here, the ceramic paint is manufactured by appropriately adjusting the composition, viscosity, particle size, etc. so that it does not flow down to the concave portion (44) when applied to the convex portion (43).

And, the light incident surface (41) can be formed as a generally flat surface.

Additionally, the solar cover glass (40) may have a thickness of 200 to 800 μm, and the depth of the concave portion (44) may be 50 to 500 μm.

[Second embodiment]

FIG. 2 is a cross-sectional view schematically showing the structure of a solar panel to which a solar cover glass according to a second embodiment of the present invention is applied.

The second embodiment (100') is the same as the first embodiment, except that in the first embodiment, concave and convex portions are formed on the light emitting surface, whereas in the second embodiment, concave and convex portions are formed on the light incident surface, and a color layer (50) is formed on the light convex portion formed on the light incident surface.

[Third embodiment]

FIG. 3 is a cross-sectional view schematically showing the structure of a solar panel to which a solar cover glass according to a third embodiment of the present invention is applied.

The third embodiment (100'') is the same as the first embodiment, but differs in that a separate uneven portion (45) is formed on the light incident surface. Only the uneven portion will be described below.

In the third embodiment, a roughened portion may be formed on the light incident surface (41). The light incident surface (41) may have a roughened portion having an irregular cone shape of a polyhedron when enlarged, so that it may have a surface roughness of a certain size.

These uneven portions can improve light transmittance by allowing the refracted reflected light to enter the interior through multiple internal reflections of sunlight.

Accordingly, the light energy reaching the solar panel (30) can be increased, thereby improving the power generation efficiency of the solar panel (30).

In addition, the horn-shaped surface shape formed on the surface is very advantageous in expressing color implementation smoothly by scattering light.

[Example 4]

FIG. 4 is a cross-sectional view schematically showing the structure of a solar panel to which a solar cover glass according to a fourth embodiment of the present invention is applied.

The fourth embodiment (100''') differs from the third embodiment only in that the light incident surface and light emission surface are opposite to each other.

[Example 5]

FIG. 5 is a cross-sectional view schematically showing the structure of a solar panel to which a solar cover glass according to a fifth embodiment of the present invention is applied.

The fifth embodiment (100'''') differs from the first embodiment in that concave and convex portions are formed on the light incident surface and the light emission surface, respectively, and colored portions are formed on the convex portions of the light incident surface and the light emission surface, respectively.

Hereinafter, a method for manufacturing a solar cover glass for a solar panel according to one embodiment of the present invention will be described. The following manufacturing method will be described based on the first embodiment.

Figure 6 is a flow chart of a method for manufacturing solar cover glass for a solar panel according to the present invention.

As shown in Figure 6, first prepare the glass.

Next, a concave portion and a convex portion are formed on at least one of the light incident surface and the light emitting surface of the prepared glass.

If necessary, the glass is processed into a shape as in Figs. 1 to 5.

Meanwhile, ceramic paint is manufactured separately from glass preparation. Here, the composition and viscosity of the paint are adjusted so that the ceramic paint does not flow down when applied only to the convex portion.

Next, the prepared ceramic paint is applied to the processed glass only on the convex portion. The application here is performed using a known method.

Next, heat treatment is performed so that the ceramic paint applied to the convex portion can be fixed.

The solar cover glass thus completed is completed as a solar panel by being connected to a back plate (10) that is placed on one side and fixed to a desired part of the exterior of a building, such as a wall or roof, and to the upper part of a solar panel (30) placed on the back plate (10).

The present invention described above is not limited to the above-described embodiments and the attached drawings, and it will be apparent to a person skilled in the art to which the present invention pertains that various substitutions, modifications, and changes are possible within a scope that does not depart from the technical spirit of the present invention.

10: Solar Panel
100 : Solar Cover Glass
110 : Light incident surface
120 : Light emitting surface
130 : Print layer
131 : Color section
132 : Transparent part
133 : Pattern section
133a: Dot pattern section
133b: Stripe pattern part
134: Diffusion projection surface
140 : Uneven surface
141 : Convex part
142 : Concave
200 : Solar Panel
210 : Surface electrode
300 : Backplate
400 : Joint sheet

Claims (3)

In the solar cover glass provided on the upper side of the solar panel,
The above solar cover glass,
Light-incident surface exposed to the outside;
a light-emitting surface facing the solar panel; and
A printing layer in which a pigment of a predetermined color is printed on at least one surface of a light incident surface or a light emitting surface;
A plurality of convex portions and a plurality of concave portions are formed on at least one of the light incident surface and the light emitting surface,
The above printed layer is,
Solar cover glass characterized by being formed only on the convex portion. A backplate fixed to the exterior of a building;
A solar panel bonded to one side of the back plate; and
A solar cover glass provided on the upper side of a solar panel; including:
The above solar cover glass,
Light-incident surface exposed to the outside;
a light-emitting surface facing the solar panel; and
A printing layer in which a pigment of a predetermined color is printed on at least one surface of a light incident surface or a light emitting surface;
A plurality of convex portions and a plurality of concave portions are formed on at least one of the light incident surface and the light emitting surface,
The above printed layer is,
A solar panel characterized by being formed only on the convex portion. A step of forming a plurality of convex and concave portions on at least one of the light incident surface and the light emitting surface of the glass;
A step of preparing ceramic paint so that the ceramic paint can be applied only to the convex portion;
A step of applying ceramic paint only to the convex portion using the prepared ceramic paint;
A method for manufacturing solar cover glass, characterized by including a step of heat-treating glass to which the ceramic paint is applied.