KR20230094594A - Color Solar Power Module including Transparent Part Intervening Color Part - Google Patents

Abstract

The present invention is to provide a photovoltaic power generation module with improved aesthetics and power generation performance. According to the present invention, a photovoltaic module including a color layer formed on the rear surface of the front protective layer, wherein the color layer has a contact color part (C1) directly contacting the rear surface of the front protective layer and the front protective layer and color layer. It consists of a plurality of color line parts in which the transparent part intervening color parts TC2, in which the transparent part is interposed between the parts, are alternately and continuously positioned, and the color line parts are spaced apart from each other in the plurality of color line parts, and the photovoltaic module When attached to the wall of the building, the color line part is disposed horizontally, and the contact color part (C1) is adjacent to the transparent part intervening color part (TC2), the photovoltaic module is provided. The photovoltaic module of the present invention has a lattice structure composed of a contact color part (C1) directly contacting the rear surface of the front protective layer and a color part (TC2) in which a transparent part is interposed between the front protective layer and the color part. The power generation performance of the photovoltaic module is improved while maintaining aesthetics by the layer.

Description

Color solar power module including transparent part intervening color part {Color Solar Power Module including Transparent Part Intervening Color Part}

The present invention is to provide a photovoltaic power generation module with improved aesthetics and power generation performance. More specifically, the present invention relates to a color photovoltaic module having a color layer including a color portion interposed between a transparent portion.

Building Integrated Photovoltaic (BIPV) is a system that is installed on the exterior walls and roofs of buildings to perform solar power generation and exterior functions of buildings, and is one of the ways to utilize solar power generation in the city.

In terms of architectural design, it is difficult to install a general photovoltaic module on the outer wall of a building as it is, because the shape of the solar cell inside the module is exposed or due to limitations such as dark colors, it is difficult to secure aesthetics comparable to that of general exterior materials.

Conventional techniques for this include a technique of applying a color layer to a front protective layer (eg, a glass substrate) or controlling reflectance using a micro-pattern or multi-layer structure. In general, among technologies for implementing color, the technology using colored glass has a problem in that when the color is darkened for internal concealment, the transmittance is lowered and the efficiency is lowered, and when the color is lightened, the transmittance is increased but the aesthetics are poor.

For example, as shown in (a) of FIG. 4 , when a color layer is provided on the back side of the front protective layer for aesthetics, sunlight does not pass through the color layer and is reflected, and color development is possible, but sunlight under the color layer is reflected. Batteries do not generate electricity.

In addition, the technology of applying color in the form of dots using ceramic ink among the conventional technologies for color development and solar cell power generation allows sunlight to pass through the dots on glass and generate electricity through the cells. At the same time, it was reflected by the dot-shaped color layer to enable simultaneous color development. Figure 4 (b) shows the incidence, reflection, and transmission paths of sunlight for the color layer formed in the form of dots on the rear surface of the front protective layer.

The shape and size of the dots forming the color layer can be changed in various ways such as circular, square, hexagonal, etc., but this affects only the visual effect. Since it varies by , the electrical output of the photovoltaic module is determined by the ratio of the area printed with ink to the total surface area. In order to secure the power generation performance and aesthetics of the module at the same time, the area of the dot should be 3~5mm ² and the ratio of the area printed with ink should be maintained at 20~50% of the total. Since the reflected amount increases, there is a limit to improvement in power generation performance. This has the same limitations even if the color layer is located on the back of the front transparent panel as in our prior art.

In order to improve this, one of the conventional techniques for applying a color layer to the front protective glass is to construct a color layer using a material in which a polymer resin is combined with an inorganic pigment or dye having high transmittance in a specific wavelength range, and polystyrene It consists of a structure in which a haze layer is joined to increase the effect of internal concealment by diffusing the incident light using a ball.

In addition, there is a technique of coating oxide films having different refractive indices in multiple layers to increase reflection of a specific wavelength range to realize color, or printing or applying ceramic ink to glass.

In addition, for example, Korean Patent Application Publication No. 2019-0019885 discloses a photovoltaic module including patterned glass. same.

The technologies so far have limitations such as deterioration in aesthetics due to color deviation or discoloration for each viewing angle or deterioration in power generation performance depending on the installation location, and improvement is required.

Patent Application Publication No. 2019-0019885

The present invention is to provide a photovoltaic module with improved power generation performance of the photovoltaic module by increasing light transmittance while maintaining aesthetics.

According to a first aspect, a photovoltaic module including a color layer formed on a rear surface of a front protective layer, wherein the color layer includes a contact color portion C1 directly contacting the rear surface of the front protective layer and the front protective layer It is composed of a plurality of color line parts in which the transparent part intervening color part TC2, in which the transparent part is interposed between the color parts, is alternately and continuously located.

In the plurality of color line parts, color line parts are spaced apart, and when the photovoltaic module is attached to a wall of a building, the color line part is disposed horizontally,

The contact color part (C1) is adjacent to the transparent part intervening color part (TC2), the photovoltaic module is provided.

According to the second aspect, when the photovoltaic module is attached to a side surface of a building, the color line portion intervening the transparent portion of the color line portion (TC2) and the contact color portion (C1) of the color line portion adjacent thereunder. The distance between them is 0 mm to 5 mm, the photovoltaic module according to the first aspect is provided.

According to the third aspect, when the photovoltaic module is attached to the side surface of a building, between the color line part intervening color part TC2 of the color line part and the contact color part C1 of the color line part adjacent thereon. The distance of 0.1 mm to 5 mm, the photovoltaic module according to the first aspect is provided.

According to the fourth aspect, the second encapsulation layer 40 located on the rear surface of the color layer 50, the solar cell 30 located on the rear surface of the second encapsulation layer 40, and the rear surface of the solar cell There is provided a photovoltaic module according to the first aspect, including a first encapsulation layer 20 positioned and a rear protective layer 10 positioned on a rear surface of the first encapsulation layer 20 .

In the photovoltaic module of the present invention, power generation performance of the photovoltaic module is improved while maintaining aesthetics by the color layer of the lattice structure composed of the contact color part (C1) and the color part (TC2) interposing the transparent part. As shown in FIG. 1, direct light can be transmitted between the contact color part C1 and the color part TC2 interposing the transparent part, and when the photovoltaic module is attached to the wall of the building, the incident angle of the upper part ( From top to bottom, the position of the sun) may increase the amount of light received by the solar cell by allowing some of the light to pass through reflection and refraction by the color portion of the contact color portion C1. In addition, at a lower angle of incidence (from the bottom to the top, from the perspective of a person), it is reflected by the colored portion and color development is possible.

1 is a schematic side cross-sectional view of a color layer formed of a contact color part (C1) directly contacting the rear surface of a front protective layer and a color part (TC2) interposing a transparent part according to the present invention.
2 is a plan view schematically showing a color layer of a lattice structure included in a photovoltaic module of the present invention.
3 is a schematic side cross-sectional view of a photovoltaic module according to one embodiment of the present invention.
4(a) is a diagram showing an optical path when the entire surface is formed of a color layer, (b) is a diagram showing an optical path when a point color layer is formed, and (c) is a diagram showing a color layer of the present invention. It is a diagram schematically showing the optical path in .
5(a) is a photograph of the sample of Example 1 viewed from the front. Figure 5 (b) is a photograph taken in the direction viewed from above when the sample of Example 1 was erected at 90 degrees. Figure 5 (c) is a photograph taken from the bottom to the top when the sample of Example 1 is erected at 90 degrees.

The present invention provides a color photovoltaic power generation module that secures power generation performance and aesthetics at the same time. The color photovoltaic power generation module according to the present invention maintains the same visual effect and improves power generation performance by increasing the amount of transmitted light. indicates

According to one embodiment of the present invention, as a photovoltaic module including a color layer formed on the rear surface of the front protective layer,

In the color layer, a plurality of contact color parts C1 directly contacting the rear surface of the front protective layer and transparent part interposed color parts TC2 in which a transparent part is interposed between the front protective layer and the color part are alternately and continuously positioned. It consists of a color line part of

In the plurality of color line parts, color line parts are spaced apart, and when the photovoltaic module is attached to a wall of a building, the color line part is disposed horizontally,

The contact color part (C1) is adjacent to the transparent part intervening color part (TC2), the photovoltaic module is provided.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. In addition, the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. The shape, size, number, etc. of elements in the drawings do not reflect actual sizes or relative proportions, and are modeled for illustration only.

In addition, although each layer is spaced apart in the cross-sectional side view of the photovoltaic module, this is only shown schematically to explain the concept, and each layer of the actual color photovoltaic module is stacked in a contact state.

1 is a schematic side cross-sectional view of a color layer formed in a lattice structure by a contact color part (C1) and a transparent part intervening color part (TC2) included in a photovoltaic module of the present invention. 2 is a plan view schematically showing a color layer of a lattice structure included in a photovoltaic module of the present invention. 3 is a schematic side cross-sectional view of a photovoltaic module according to an embodiment of the present invention. 4 (a) is a diagram showing an optical path when the entire surface is formed of color layers, (b) is a diagram showing an optical path when formed by point color layers, and (c) is a diagram showing a color path according to the present invention. It is a diagram schematically showing the light path in the layer.

Hereinafter, a configuration of a color layer of a photovoltaic module according to the present invention will be described with reference to FIGS. 1 to 4 .

As used herein, the term 'front' of a layer or substrate refers to the side on which sunlight enters the photovoltaic module, and the term 'rear' of the layer or substrate refers to the opposite side of the 'front', Refers to the side of a photovoltaic module that does not face sunlight. As shown in FIG. 2, in the photovoltaic module of the present invention, the color layer includes a plurality of color line parts (eg, LP1 in FIG. 2) composed of a plurality of color parts (eg, 11, 12, 13 in FIG. 2). to LP4, etc.). In this specification, a line composed of a plurality of color parts constituting a color layer is referred to as a 'color line part'. The color line part is composed of a plurality of rectangular unit color parts, and for convenience, the rectangular unit color parts (eg, 11 to 16 and 22 to 27 in FIG. 2 ) are referred to as 'color parts'.

In general, a photovoltaic module includes a rear protective layer 10, a first encapsulation layer 20 disposed on the front surface of the rear protective layer 10, and a plurality of solar cells disposed on the front surface of the first encapsulation layer 20 ( 30), the second encapsulation layer 40 disposed on the front surface of the plurality of solar cells 30, the color layer 50 disposed on the front surface of the second encapsulation layer, and the color layer 50 disposed on the front surface It includes a front protective layer 60.

In the photovoltaic module according to one embodiment of the present invention, transmittance is increased while maintaining aesthetics due to the structure of the color layer, so that the power generation performance of the photovoltaic module is improved.

The color layer 50 (hereinafter, also referred to as 'the color layer of the present invention') included in the photovoltaic module 100 according to one embodiment of the present invention is a plurality of colors on the rear surface of the front protective layer 60. It is formed in the form of an additive lattice.

The front protective layer 60 is a layer positioned on the front side of the photovoltaic module where sunlight is incident, and a transparent panel is used. Transparent panels are generally low iron tempered glass, PC (polycarbonate), PET (polyethylene terephthalate), ETFE (ethylene tetra fluoro-ethylene), ECTFE (ethylene chlorotrifluoroethylene), PDMS (polydimethylsiloxane), PVA (polyvinyl alcohol), or PI (poly-imide) polymer panels and the like may be used, but are not limited thereto.

As shown in FIG. 2, the color layer of the present invention formed in a lattice form by a plurality of color parts has a plurality of contact color parts C1 (hereinafter referred to as 'contact color') formed by directly contacting the back surface of the front surface protective layer. part (C1)') and a plurality of transparent parts interposed color parts TC2 (hereinafter referred to as 'transparent part interposed color parts TC2') in which transparent parts are interposed between the front protective layer and the color part alternately. It is composed of a plurality of color line parts continuously positioned as . In the plurality of color line parts (LP1 to LP4 in FIG. 2), the color line parts are spaced apart, and when the photovoltaic module is attached to the wall of a building, the color line parts are disposed horizontally, and the contact color parts ( C1) is positioned adjacent to the color part TC2 (for example, color parts 13, 14, 26, and 35) between the transparent parts, and a plurality of color parts in the color layer are formed in a lattice shape as a whole.

Among the contact color part C1 and the transparent part intervening color part TC2 on the back side of the front protective layer, the transparent part contacting the front protective layer is first formed by printing with a 3D printer. Thereafter, a color layer is formed by printing the color portion of the transparent portion intervening color portion TC2 on the back side of the transparent portion of the transparent portion intervening color portion TC2 with a 3D printer. The contact color part C1 and the transparent part intervening color part TC2 are formed vertically with respect to the front protective layer.

As the dye used to form the transparent portion and the colored portion, conventionally known dyes may be used. Specifically, any dye commonly known in the art as being applicable to a 3D printer, such as an acrylic dye, may be used, and since these dyes are well known, they are not separately described here.

When the photovoltaic module is attached to the side of a building, the color line part is disposed horizontally, and the color part TC2 intervening the transparent part of the color line part and the contact color part C1 of the color line part adjacent below it The distance A between them (for example, in the case of the color part 12 and color part 23 in FIG. 2, and the color part 24 and color part 33, and A in FIG. 3) is 0 mm to 5 mm. This is because when the photovoltaic module including the color layer according to the present invention is attached to the side wall of a building, the closer the distance A is to 0 mm, the better the color development, and when the distance A is greater than 5 mm, the solar cell located on the rear side of the color layer. becomes visible, which may deteriorate aesthetics.

On the other hand, when the photovoltaic module is attached to the side of the building, the color line part is disposed horizontally, and the color part TC2 of the color line part and the transparent part intervening color part TC2 and the contact color part C1 of the color line part adjacent thereon The distance B between them (for example, B in FIG. 3 in the case of color parts 11 and 22 in FIG. 2, and color parts 23 and 32, etc.) is 0.1 mm to 5 mm. If the distance B is less than 0.1 mm, the amount of light incident on the solar cell is insufficient, which is undesirable in terms of power generation output. If the distance B exceeds 5 mm, the solar cell located on the rear side of the color layer is visible, and aesthetics may deteriorate. Specifically, when the photovoltaic module including the color layer according to the present invention is attached to the sidewall of a building, the larger the distance B, the greater the amount of light incident to the solar cell, thereby increasing the power generation output. However, although distance A and distance B are shown identically for convenience in FIG. 2 , as described above, the distances of distance A and distance B may be the same or different.

As shown in FIGS. 2 and 3, the color line parts are formed by being spaced apart from each other at intervals A and B. In addition, in the upper and lower color line parts, the color part TC2 is positioned between the transparent part at the corresponding position of the color line part located above and below the contact color part C1 of any one color line part. For example, referring to FIG. 2 , the color parts 24 and 44 of the color line part above and below the color part 33 corresponding to the contact color part C1 are the transparent part intervening color part TC2. In the same color line portion, the contact color portion C1 and the transparent portion intervening color portion TC2 are continuously and alternately formed without gaps.

In the contact colored part C1 and the transparent part interposed color part TC2, the width W1 of the contact colored part C1 and the width W2 of the colored part TC2 between the transparent part may be equal to or different from each other, , in terms of workability and efficiency, may each independently range from 0.1 mm to 2 mm.

The length (L1) of the contact color part (C1) and the length (L2) of the color part (TC2) between the transparent part may be the same as or different from each other, and in terms of workability and efficiency, each independently may be in the range of 0.1 mm to 2 mm. there is.

The height of the contact color part C1 (H1 in FIG. 3) may be 10 μm to 20 μm in terms of workability and efficiency. The height of the color portion TC2 (H+H2 in FIG. 3) between the transparent portion may be 30 μm to 300 μm, including the height of the color portion H2 of 10 μm to 20 μm, in terms of workability and efficiency. . That is, the height of the color portion TC2 (H+H2 in FIG. 3) between the transparent portions may be 30 μm to 300 μm, of which 10 μm to 20 μm is the height of the color portion H2.

As described above, due to the transparent part, the thickness of the color part and the color part between the transparent part is different, and accordingly, the distance between the color layer and the second encapsulation layer is locally different, and the distance to the solar cell is locally different. It becomes different. That is, the distance to the solar cell varies and the distance at which light is received varies, and thus, power generation output may vary. However, since the heights of the contact color part C1 and the color part TC2 interposed between the transparent part in the color layer of the present invention are not high, the power generation output does not change or decrease due to the difference in distance to the solar cell.

As shown in (c) of FIGS. 1 and 4 , sunlight incident from the front surface of the front protective layer 60 may be transmitted through the gap between the contact color part C1 and the transparent part intervening color part TC2. there is. In addition, the amount of reflected light and refracted light may be controlled by the surface, side surface, and thickness of the upper color part of the contact color part C1 and the transparent part interposed color part TC2. Furthermore, light may also be transmitted through refraction and reflection by the transparent part under the colored part TC2 interposed by the transparent part. Furthermore, compared to the prior art in which light passing through the front protective layer is directly reflected by the color layer by the transparent part intervening color part TC2, between the transparent part and the color line part of the transparent part interposed color part TC2 The amount of light received by the solar cell can be increased by partially passing the light by the interval of , and the color function is maintained as in the prior art by being reflected by the color part of the contact color part C1 and the color part TC2 interposed by the transparent part. It can be. In contrast, when the entire surface of the prior art is formed of a color layer (FIG. 4(a)), most of the light is reflected by the color layer, so the aesthetics are excellent, but the power generation efficiency is low, and the point color layer (((a) of FIG. 4) has excellent aesthetics. In the case of b)), some light is reflected from the color layer and only a part of the light incident between the point color layers is transmitted and used for photovoltaic power generation, but there is a limit to improving power generation performance.

The photovoltaic module 100 according to one embodiment of the present invention includes a second encapsulation layer 40 positioned on the rear surface of the color layer 50 and a solar cell positioned on the rear surface of the second encapsulation layer 40 ( 30), a first encapsulation layer 20 positioned on the rear surface of the solar cell, and a rear protective layer 10 positioned on the rear surface of the first encapsulation layer 20. A schematic side cross-sectional view of such a photovoltaic module 100 is shown in FIG. 3 .

Materials, shapes, dimensions, and manufacturing methods of the second encapsulation layer 40, the solar cell 30, the first encapsulation layer 20, and the rear protective layer 10 are generally known in the art, and are well known in the art. The same may apply. Therefore, it is not described here in detail.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and variations are possible without departing from the technical spirit of the present invention described in the claims. It will be obvious to those skilled in the art.

Example

The present invention will be described through examples below. However, the following examples are intended to aid understanding of the present invention, and the present invention is not limited thereto.

(Example 1)

On one surface of the low iron tempered glass having a thickness of 5 mm, the lower transparent part of the contact color part (C1) and the transparent part intervening color part (TC2) was printed with a 3D printer so as to have the lattice pattern shown in FIG. 2. Thereafter, the color layer included in the photovoltaic module of the present invention was formed by printing the upper color part of the color part TC2 between the transparent parts on the lower transparent part of the color part TC2 between the transparent parts with a 3D printer. The transparent portion was printed using a transparent acrylic dye, and the upper color portion of the contact color portion (C1) and the transparent portion intervening color portion (TC2) was printed using a red acrylic dye. The contact color part C1 and the transparent part intervening color part TC2 have distance A: 0 mm, distance B: 0.5 mm, width W1: 1.78 mm, width W1: 1.78 mm, L1: 1.78 mm, L2: 1.28 mm, H1: 20 μm, H: 80 μm, H2: 20 μm were printed.

A photograph of a sample having a color layer formed on a tempered glass substrate is shown in FIG. 5 . Figure 5 (a) is a photograph when looking at the sample from the front. Figure 5 (b) is a photograph taken in the direction viewed from above when the sample is erected at 90 degrees, showing that the transparent portion is visible when viewed from above. That is, FIG. 5(b) shows that there is an interval where light can be received from the viewpoint of the sun. Figure 5 (c) is a photograph taken from the bottom up when the sample is erected at 90 degrees, showing how it looks from the direction a person looks at the sample from below when attached to a building. When viewed from the front as in FIG. 5 (a), the background behind is visible due to the spacing between the color layers. Compared to FIG. 5(b) viewed from an angle where sunlight is incident with a dark background similar to a solar cell, FIG. 5(c) viewed from a reflective angle does not show the background behind. This shows that the aesthetics can be improved by concealing the solar cell due to the color layer.

(Example 2)

A continuous full color layer with a height of 20 μm was 3D printed with the same red acrylic dye as used in Example 1 on the entire surface of one side of a low iron tempered glass having a thickness of 5 mm, and this was used as a comparative sample.

The power generation output for the same amount of light was compared using the same solar cell on the back of the sample of Example 1 and the comparative sample, and the power generation output of the sample of Example 1 increased by 107% compared to that of the comparative sample. .

10: back protective layer 20: first sealing layer
30: solar cell 40: second sealing layer
50: color layer 60: front protective layer

Claims (4)

A photovoltaic module including a color layer formed on the rear surface of the front protective layer,
In the color layer, a plurality of contact color parts C1 directly contacting the rear surface of the front protective layer and transparent part interposed color parts TC2 in which a transparent part is interposed between the front protective layer and the color part are alternately and continuously positioned. It consists of a color line part of
In the plurality of color line parts, color line parts are spaced apart, and when the photovoltaic module is attached to a wall of a building, the color line part is disposed horizontally,
The contact color part (C1) is adjacent to the transparent part interposed color part (TC2), the photovoltaic module. According to claim 1,
When the photovoltaic module is attached to the side of a building, the distance between the colored part TC2 interposing the transparent part of the color line part and the contact color part C1 of the color line part adjacent below it is from 0 mm to 0 mm. 5mm, solar power module. According to claim 1,
When the photovoltaic module is attached to the side of a building, the distance between the transparent part intervening color part TC2 of the color line part and the contact color part C1 of the color line part adjacent thereon is 0.1 mm to 5 mm. Phosphorus, solar power module. According to claim 1,
A second encapsulation layer 40 located on the rear surface of the color layer 50,
A solar cell 30 positioned on the rear surface of the second encapsulation layer 40,
A first encapsulation layer 20 located on the rear surface of the solar cell and
A rear protective layer 10 positioned on the rear surface of the first encapsulation layer 20
Including, the photovoltaic module.

Images