KR102253483B1 - Color Photovoltaic Module For Building - Google Patents

Abstract

The present invention relates to a color photovoltaic module applicable to buildings and having improved efficiency and, more particularly, to a color photovoltaic module capable of maintaining a high level of photovoltaic efficiency while easily controlling color. To this end, the color photovoltaic module comprises a front glass, a color coating layer, a filler layer, a plurality of shingled photovoltaic cells, one or more connecting ribbons, and a back sheet or tempered glass.

Description

Color photovoltaic module for building with improved efficiency and applicable to buildings

The present invention relates to a color photovoltaic module applicable to a building and with improved efficiency, and more particularly, to a color photovoltaic module capable of easily adjusting color and maintaining a high level of power generation efficiency of solar power at the same time.

Recently, as existing energy resources such as oil and coal are expected to be depleted, interest in alternative energy to replace them is increasing. Among them, solar cells are in the spotlight as next-generation cells that convert solar energy into electrical energy. A plurality of such solar cells are connected in series or in parallel by a ribbon, and are manufactured in the form of solar cells by a packaging process for protecting a plurality of solar cells.

In general, solar cells are installed on the roof or roof of a building, but in apartments and high-rise buildings, the size of solar cells that can be installed on the roof or roof is limited, making it difficult to efficiently utilize sunlight. Accordingly, research on a building-integrated solar cell that is installed on the exterior walls of houses, buildings, etc. and integrated into houses, buildings, etc. is being actively conducted.

If a building-integrated solar cell is applied, photoelectric conversion can be performed in a large area of the outer wall of the building, so that sunlight can be used efficiently.

However, in order for a building-integrated solar cell to be successfully applied to the exterior wall of a building, it must have excellent aesthetics. However, in the existing building-integrated solar cell, it is difficult to improve the aesthetics of the exterior because the solar cell and the wiring connected thereto are visible from the outside or have only black color to maximize the absorption of sunlight.

As an alternative to this, Prior Document 1 (Korean Laid-Open Patent Publication No. 10-2018-0002974) proposes a structure including a plurality of base portions, colored portions, and reflective portions, but the process is complicated and expensive. There is this.

As described above, in the conventional color solar module, a solar module with colorful colors was developed to give aesthetics to the monotonous black solar module, but the color pigment inhibited light transmission, resulting in a decrease in the efficiency of the solar module.

As an example, a color solar module using a light absorbing pigment may be considered. However, when the light absorption pigment is used, there is a problem that the light transmittance is lowered. In other words, since the light transmittance is low, the amount of light reaching the solar cell is small, and the power generation efficiency is rapidly deteriorated.

On the other hand, Prior Document 2 (Korean Patent Registration No. 10-2137258) relates to a variable color solar module using double-sided halftone printing and a method for manufacturing the same. A color photovoltaic module to be expressed is disclosed. However, the photovoltaic module according to Prior Document 2 has a problem that it is difficult to implement a specific color desired, and there is a problem in that the photovoltaic power generation efficiency is lowered by the printed dot.

In addition, the conventional solar module corresponds to a type of connecting a plurality of shingled solar power generation cells with a connecting ribbon in order to minimize power loss. In the case of such a conventional photovoltaic module, since power generation does not occur in the space between the shingled photovoltaic power generation cells in which the connecting ribbon is located, there is a problem that the amount of power generation per unit area is reduced.

In addition, in order to improve this point, when the space between the shingled photovoltaic cells is reduced, there is a problem that a defect may occur in the ribbon during installation. In order to prevent such defects in the ribbon, Prior Document 3 (Korean Patent Registration No. 10-1144254) discloses forming a hole in the connecting ribbon in order to prevent the bonding of the connecting ribbon and the solar cell and improve adhesion, This method also requires an additional process, and consequently, the space between the shingled solar power generation cells occurs in any case, and thus there is a problem in that power generation efficiency is lowered.

Prior art literature

Patent Literature

(Patent Document 0001) Korean Laid-Open Patent Publication No. 10-2018-0002974

(Patent Document 0002) Korean Patent Registration No. 10-2137258

(Patent Document 0003) Korean Patent Registration No. 10-1144254

An object of the present invention is to provide a color photovoltaic module capable of easy color adjustment and at the same time maintaining a high level of solar power generation efficiency.

In order to solve the above problems, an embodiment of the present invention is a color solar module applicable to a building, comprising: a windshield; A color coating layer disposed on the lower surface of the windshield and bonded to the windshield; A filler layer disposed under the color coating layer; A plurality of shingled photovoltaic cells fixed and disposed within the filler layer; One or more connecting ribbons connected to one of the two adjacent shingled photovoltaic cells and electrically connected to the other rear bus bar to electrically connect the adjacent two shingled photovoltaic cells to each other; And a back sheet or tempered glass disposed under the filler layer, wherein the color coating layer is _{formed by a coating composition containing TiO 2} and polysilazane, an inorganic pigment, and a solvent, and is applicable to buildings. Provides solar modules.

In some embodiments of the present invention, the inorganic pigment may include a ceramic pigment including _{Al 2} O ₃ and SiO ₂ having plate-shaped particles having a diameter of 0.02 micrometers to 20 micrometers.

In some embodiments of the present invention, the adjacent shingled photovoltaic cells may be arranged in a form in which side cross-sections form a predetermined angle with respect to the surface of the windshield while allowing portions to overlap with each other.

In some embodiments of the present invention, each of the connecting ribbons may extend from one end to the other end of a shingled photovoltaic cell having a front bus bar to which it is connected.

In some embodiments of the present invention, each of the connecting ribbons is at one end of a first shingled photovoltaic cell having a front bus bar to be connected, and an adjacent second shingled solar cell having a rear bus bar to which the connecting ribbon is connected. It may extend to the opposite end of the one end of the photovoltaic cell.

In some embodiments of the present invention, the thickness of the shingled photovoltaic cell is 1 to 3 mm, the thickness of the filler layer is 60 to 70 mm, and the filler layer may include EVA.

According to an embodiment of the present invention, the color photovoltaic module maintains high power generation efficiency and realizes color, thereby exerting an effect of promoting aesthetic aesthetics when applied to BIPV or the like.

According to an embodiment of the present invention, by reducing the spacing between adjacent shingled photovoltaic cells, it is possible to exhibit an effect of increasing the power generation efficiency per unit area.

According to an embodiment of the present invention, it is possible to exhibit an effect of improving the durability of a color solar module by minimizing defects in a connecting ribbon connecting adjacent shingled solar power cells.

According to an embodiment of the present invention, it is possible to exhibit the effect of stably protecting the shingled solar power generation cell inside the filler layer while increasing power generation efficiency.

According to an embodiment of the present invention, by implementing the color coating layer through a spray method instead of a vacuum deposition method, the manufacturing process of the color solar module can be efficiently performed.

According to an embodiment of the present invention, an element for implementing color is implemented more simply than a conventional color photovoltaic module, so that an effect of reducing manufacturing cost can be exhibited.

According to an embodiment of the present invention, by stably maintaining an inorganic pigment that realizes color by polysilazane and protecting it from foreign substances penetrating from the outside, the color sense of the color solar module does not change over time. It can exert an effect that does not exist.

According to an embodiment of the present invention, it is possible to exert an effect of implementing various colors of color as desired through the selection of an inorganic pigment.

1 schematically shows an exploded perspective view of a color solar module according to an embodiment of the present invention.
2 schematically shows a stacked structure of a color solar module according to an embodiment of the present invention.
3 schematically shows steps of forming a color coating layer on a windshield according to an embodiment of the present invention.
4 schematically shows a curing process of the color coating layer according to an embodiment of the present invention.
5 schematically shows the internal structure of the color coating layer according to an embodiment of the present invention.
6 shows an experiment result of a color solar module according to an embodiment of the present invention.
7 shows an assembly of a color solar module according to an embodiment of the present invention.
8 shows a blue color photovoltaic module according to an embodiment of the present invention.
9 schematically shows a coupling structure of a shingled solar power generation cell and a connection ribbon according to an embodiment of the present invention.
10 schematically shows a side view of a shingled solar cell and a connection ribbon according to an embodiment of the present invention.
11 is a schematic side view of a shingled solar cell and a connecting ribbon according to an embodiment of the present invention.
12 schematically shows a stacked structure of a color solar module according to an embodiment of the present invention.
13 schematically shows a side view of a shingled solar cell and a connection ribbon according to an embodiment of the present invention.
14 schematically shows a stacked structure of a color solar module according to an embodiment of the present invention.

Various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for illustrative purposes, a number of specific details are disclosed to aid in an overall understanding of one or more aspects. However, it will also be appreciated by those of ordinary skill in the art that this aspect(s) may be practiced without these specific details. The following description and the annexed drawings set forth in detail certain illustrative aspects of the one or more aspects. However, these aspects are illustrative and some of the various methods in the principles of the various aspects may be used, and the descriptions described are intended to include all such aspects and their equivalents.

As used herein, “an embodiment,” “example,” “aspect,” “example,” and the like may not be construed as having any aspect or design described as being better or advantageous than other aspects or designs. .

In addition, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless specified otherwise or is not clear from the context, "X employs A or B" is intended to mean one of the natural inclusive substitutions. That is, X uses A; X uses B; Or when X uses both A and B, "X uses A or B" can be applied to either of these cases. In addition, the term “and/or” as used herein should be understood to refer to and include all possible combinations of one or more of the listed related items.

In addition, the terms "comprising" and/or "comprising" mean that the corresponding feature and/or element is present, but excludes the presence or addition of one or more other features, elements, and/or groups thereof. It should be understood as not doing.

In addition, it will be understood that singular expressions such as “han” and “above”, which do not clearly indicate other content in the present specification, include plural expressions. Thus, for example, a “component surface” includes one or more component surfaces.

In addition, terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In addition, terms used in the present specification are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein including technical or scientific terms are generally understood by those of ordinary skill in the art to which the present invention belongs. It has the same meaning as. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning Is not interpreted as.

On the other hand, this patent is a study conducted with the support of the project'Development of micro-pattern color BIPV module for application of aesthetic architectural design (Project name: Regional Cooperation Industry Promotion Project)'.

1 schematically shows an exploded perspective view of a color solar module according to an embodiment of the present invention. 2 schematically shows a stacked structure of a partially transparent color photovoltaic module according to an embodiment of the present invention.

A color solar module applicable to a building according to an embodiment of the present invention, comprising: a windshield 100; A color coating layer 200 disposed on a lower surface of the windshield 100 and bonded to the windshield 100; A filler layer 300 disposed under the color coating layer 200; At least one solar power generation cell 400 fixed and disposed within the filler layer 300; And a back sheet or tempered glass 500 disposed under the filler layer 300.

The color solar module applicable to the building may correspond to Building Intergrated PhotoVoltaics (BIPV).

In another embodiment of the present invention, the photovoltaic cell may have a structure different from that of FIG. 1 together with a ribbon or the like.

In the present invention, since the color coating layer 200 is disposed between the windshield 100 and the filler layer 300, not the upper side corresponding to the outside of the windshield 100, the color coating layer 200 is discolored due to the external environment. Etc. can be prevented.

Preferably, the filler layer 300 corresponds to a filler containing EVA (Ethylene Vinyl Acetate), and in the case of the EVA filler, the color coating layer 200 does not change color and properties of the inorganic pigment and polysilazane binder. The color coating layer 200 may have strong adhesion at the interface with the polysilazane binder.

The color coating layer 200 is _{formed by a coating composition containing TiO 2} and polysilazane having an average molecular weight of 25000 or less, an inorganic pigment, and a solvent, a color solar module applicable to a building.

The polysilazane may be represented by the following formula.

Here, R1, R2 and R3 are independently hydrogen, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, a group in which the group directly connected to silicon is carbon, an alkylsilyl group, an alkylamino group, and an alkoxy group, and n is an integer.

Preferably, the polysilazane is preferably a polysilazane in which R1, R2, and R3 are inorganic substances, and in this case, light transmittance may be improved, and a change in properties of the inorganic pigment may be prevented.

More preferably, the polysilazane is preferably a polysilazane in which R1, R2, and R3 are hydrogen, and in this case, it may be represented by the following formula.

In this case, when the coating is applied, it may be cured to a hardness of 9H or higher, and adhesion to glass may be improved. In particular, since it does not contain carbon, it is possible to form a _{high-purity SiO 2 film upon curing.}

Specifically, the polysilazane is a polymer compound having a Si-N-Si- bond, and the polysilazane is converted _{to silica (SiO 2) through heat treatment to form the color coating layer 200 on the windshield 100.} A silica film is formed.

A silica film is prepared from polysilazane by such heat treatment, and a number of pores are formed in the silica film while the solvent is removed during this process. The pores formed in this way lower the refractive index and reflectance of the color coating layer 200 for implementing the color and increase the transmittance, so that the photovoltaic cell according to light transmission in a region other than the region where the inorganic pigment is located in the color coating layer 200 400) can increase the power generation efficiency.

On the other hand, since polysilazane has excellent reactivity with moisture compared to other silica precursors, it has excellent hardness, hydrophilicity, durability, and adhesion to glass, so that the color coating layer 200 is formed on the lower side of the windshield 100 with a uniform thickness. ) Can be formed, thereby maintaining the same color overall in the color solar module.

Preferably, the weight average molecular weight of the polysilazane is preferably 1000 to 25000 g/mol, more preferably 6,000 to 18,000 g/mol. When the weight average molecular weight is less than 1,000 g/mol, durability is deteriorated, and when it exceeds 25,000 g/mol, workability and coating properties are rather deteriorated.

The polysilazane is used in 3 to 13 parts by weight based on 100 parts by weight of the solvent, and when the content is less than 3 parts by weight, the strength and durability of the film decrease, and when it exceeds 13 parts by weight, a uniform coating layer cannot be formed, and thus the transmittance of the film. And durability is rather deteriorated.

The color coating layer 200 formed of a coating composition including polysilazane, an inorganic pigment, and TiO ₂ exhibits high light transmittance, and has an advantage in that it is easy to form a layer on the windshield 100.

The color coating layer 200 can protect from oxidation, deterioration and whitening of TiO2 and inorganic pigments by polysilazane, and can suppress the occurrence of yellowing even when exposed to sunlight for a long time. Can avoid the problem of falling.

Preferably, as described later _{, a coating composition containing TiO 2} and polysilazane having an average molecular weight of 25000 or less, an inorganic pigment, and a solvent is applied on the windshield 100 by a spray spray method, and then a special heat treatment to be described later. Thus, light transmission properties and durability can be improved.

Preferably, the inorganic pigment includes a ceramic pigment including _{Al 2} O ₃ and SiO ₂ having plate-shaped particles having a diameter of 0.02 micrometers to 20 micrometers.

On the other hand, the TiO ₂ makes it possible to stably perform curing at a relatively low temperature in the curing step of the coating composition described later, and includes _{Al 2} O ₃ and SiO _{2 having plate-shaped particles of 0.02 micrometers to 20 micrometers.} In ceramic pigments, _{by bonding with plate-shaped Al 2} O ₃ or SiO ₂ , it can also play a role of further improving light transmission characteristics.

In one embodiment of the present invention, the ceramic pigment is based on Al ₂ O ₃ and SiO ₂ , and after pulverizing/classifying them, hydrolysis of the metal salt is performed, and after the alkali salt is removed, drying and Crystallization of the coating layer and removal of crystallized water are performed through the heat treatment process.

Preferably, the coating composition is a solvent; and TiO ₂ , a polysilazane having an average molecular weight of 25000 or less, and an inorganic pigment; the ratio of 20:1 to 5:1.

First, TiO ₂ , polysilazane having an average molecular weight of 25000 or less, and an inorganic pigment are prepared, and then the prepared materials are mixed in a solvent. On the other hand, when _{the ratio of the solvent; and TiO 2} , polysilazane having an average molecular weight of 25000 or less, and an inorganic pigment; exceeds 20:1, the color coating layer 200 may not be uniformly formed, and the solvent; and TiO ₂ , When the ratio of polysilazane having an average molecular weight of 25000 or less, and inorganic pigments is lower than 5:1, the curing of the polysilazane is not smoothly performed and optical properties such as haze and light transmittance may be deteriorated. have.

On the other hand, _{with respect to the mass ratio of TiO 2} , polysilazane, and inorganic pigment of the coating composition, preferably, the coating composition comprises 60 parts by weight of polysilazane; 10 to 30 parts by weight of TiO2; And 10 to 30 parts by weight of an inorganic pigment.

More preferably, the mass ratio of the polysilazane and the inorganic pigment corresponds to 0.5:1 to 2:1.

In the above content, when the color coating layer 200 is formed, TiO _{2 is uniformly bonded around the plate-shaped Al 2} O ₃ particles and SiO ₂ particles, thereby exhibiting a better color feeling, and also the color coating layer When (200) is cured, _{the bonding structure of TiO2, Al 2} O ₃ particles, SiO ₂ particles, and polysilazane may be dense.

Preferably, _{the ratio of TiO 2} and the inorganic pigment is preferably 0.8:1 to 2:1. _{When the content of TiO 2} is less than 0.8:1, the bonding structure of the polysilazane is relatively weak, so that the durability decreases, and light transmission loss may occur due to the non-uniformity of the bonding structure. When the content of _{TiO 2} is greater than 2:1 _{, TiO 2} may form a crystal alone, so that it may have an appearance as if a stain has occurred as a whole, and as a result, a problem may occur in light transmittance.

Preferably, the solvent is not limited as long as it is capable of dissolving polysilazane, but specifically contains at least one of an aromatic hydrocarbon, an aliphatic hydrocarbon, an ester, an ether, an alcohol-based organic solvent, and more preferably, the The solvent includes dibutyl ether.

Dibutyl ether can homogeneously disperse polysilazane, a ceramic inorganic pigment including _{Al 2} O ₃ and SiO _{2 , and TiO 2} , and the coating composition can be applied to the color coating layer 200 by a drying process described later. By promoting a more homogeneous change of polysilazane to silica during formation, better light transmittance can be attained in the binder portion.

3 schematically shows the steps of forming the color coating layer 200 on the windshield 100 according to an embodiment of the present invention.

The color coating layer 200 may include performing a surface pretreatment using the front glass 100 as a plasma pretreatment (S100); Applying the coating composition to the windshield 100 by a spray method (S200); Performing primary drying by applying hot air at a temperature of 140° to 160° while the coating composition is applied to the windshield 100 (S300); In a state in which the coating composition is applied to the windshield 100, heating is performed at a temperature of 180° to 250° by an oven in direct contact with the windshield 100 (S400). It is formed on one side of the glass 100.

In step S100, the windshield 100 is cleaned by cerium oxide and alcohol, and then, plasma pretreatment is performed in an _{Ar/O 2 environment.}

In step S200, the coating composition is applied by a spray method. In the case of coating by spraying as described above, it may have a great advantage in terms of operation compared to the conventional deposition method.

In step S300, in a state in which hot air of a temperature of 140° to 160° is applied inside the sealed chamber, the windshield 100 coated on the upper surface of the coating composition moves along the conveyor. Preferably, the step S300 is performed for 2 to 10 minutes. More preferably, the step S300 is performed for 2 to 4 minutes.

In the present invention, TiO ₂ and polysilazane having an average molecular weight of 25000 or less and inorganic pigments are not cured in an oven immediately, but preliminarily cured by hot air in step S300, thereby preparing a polysilazane binder. TiO ₂ and the inorganic pigment may be more densely cured, and thus the overall light transmittance may be improved.

In step S400, heating is performed at a temperature of 180° to 250° by an oven in direct contact with the windshield 100 in a state applied to the windshield 100. It is performed. Preferably, the step S400 is performed for 40 minutes to 1 hour and a half, more preferably 50 minutes to 1 hour 10 minutes.

Through this process, the solvent is evaporated, and the color coating layer 200 may be firmly formed on one surface of the windshield 100. Specifically, by performing step S400 after step S300 _{, TiO 2} is uniformly surrounded throughout the circumferential surface of _{plate-shaped Al 2} O ₃ and SiO ₂ particles, which makes the matrix inside the polysilazane more solidly formed. It can exert an effect.

4 schematically shows a curing process of the color coating layer 200 according to an embodiment of the present invention.

5 schematically shows the internal structure of the color coating layer 200 according to an embodiment of the present invention.

Inside the polysilazane binder, the plate-shaped particles of _{Al 2} O ₃ or SiO ₂ are coated with _{TiO 2.} Light transmitted through the windshield 100 passes through a polysilazane binder having high light transmittance and low light reflectance, and diffraction occurs when passing through plate-shaped particles of _{Al 2} O ₃ or SiO _2. The plate-shaped particles of Al ₂ O ₃ or SiO ₂ transmit a fairly high amount of light, and some of the light is reflected at the interface (lower side) between the plate-shaped particles of _{Al 2} O ₃ or SiO _{2 and TiO 2.}

The reflected light interferes with the reflected light reflected from the upper TiO ₂ layer to give a color, and the wavelength of the final reflected light is determined according to the thickness of _{Al 2} O ₃ or SiO _2. Therefore, the color of the reflected light can be determined by the diameter or thickness of the _{plate-shaped Al 2} O ₃ or SiO _{2 , and by selecting Al 2} O ₃ or SiO ₂ capable of expressing a desired color, the desired aesthetics can be exhibited.

6 shows an experiment result of a color solar module according to an embodiment of the present invention.

As shown in Figure 6, the windshield 100 and the color coating layer 200 used in the color solar module according to the present invention has a high light transmittance, thereby exhibiting high power generation efficiency, and severe conditions Also, it can be seen that the structure and shape can be continuously maintained.

As shown in FIG. 6, it can be seen that in the overall color photovoltaic module of various colors, the Pmax value and the Fill Factor value hardly change even after the high-temperature, high-humidity temperature cycle.

In the case of the embodiments shown in FIG. 6, it corresponds to the color photovoltaic module having the structure shown in FIG. 1, and all the examples are common as follows except for the content of the pigment in the coating composition of the color coating layer. It has a component ratio.

Weight ratio Solvent-dibutyl ether 90% Polysilazane 6% TiO2 2% Inorganic Pigment (Inorganic Pigment of C Simulation) 1.6 to 3% Others (surfactants, etc.) One%

On the other hand, the following table shows the experimental results for the power generation efficiency compared to the Bare (colorless solar module).

division Bare 2 4 5 6 7 14 18 23 Isc(A) 9.107 8.451 8.492 8.498 8.702 8.501 8.920 8.282 8.470 Bare-to-bare ratio 100% 93% 93% 93% 96% 93% 98% 91% 93% Pmax(W) 4.51 4.20 4.18 4.17 4.27 4.16 4.36 4.10 4.18 Bare-to-bare ratio 100% 93% 93% 92% 95% 92% 97% 91% 93%

7 shows an assembly of a color solar module according to an embodiment of the present invention.

8 shows a blue color photovoltaic module according to an embodiment of the present invention.

As shown in FIGS. 7 and 8, the color photovoltaic module according to the embodiments of the present invention can exhibit an effect of maintaining uniform colors as a whole while implementing various colors.

9 schematically shows the coupling structure of the shingled solar power generation cell 410 and the connection ribbon 430 according to an embodiment of the present invention.

A color solar module applicable to a building according to an embodiment of the present invention includes a windshield 100; A color coating layer 200 disposed on a lower surface of the windshield 100 and bonded to the windshield 100; A filler layer disposed under the color coating layer 200; A plurality of shingled photovoltaic cells (410) fixedly disposed within the filler layer; It is connected to one of the two adjacent shingled photovoltaic cells 410, which is connected to the front bus bar 420, and is electrically connected to the other rear bus bar, so that the adjacent two shingled photovoltaic cells 410 are connected to each other. At least one connecting ribbon 430 electrically connected to each other; And a back sheet or tempered glass 500 disposed under the filler layer, wherein the color coating layer 200 is _{formed by a coating composition containing TiO 2} and polysilazane, an inorganic pigment, and a solvent. .

The description of the color coating layer 200 and the coating composition overlaps those described with reference to FIGS. 1 to 8, and a description thereof will be omitted below.

As shown in Figure 9, the shingled photovoltaic power generation cell disposed inside the filler layer of the present invention is electrically connected to the adjacent shingled photovoltaic power generation cell 410 to constitute an overall photovoltaic power generation module.

Each shingled photovoltaic power generation cell 410 has a front bus bar 420 formed on the front side and a rear bus bar (not shown) formed at the rear side, and the first shingled photovoltaic power generation cell 410 A part of the connection ribbon 430 is attached to the front bus bar 420 (left in FIG. 9), and the rear bus bar (not shown) of the second shingled solar power cell 410 (right in FIG. 9) When a part of the connection ribbon 430 is attached to, adjacent shingled solar power cells 410 may be electrically connected to each other.

Meanwhile, the connection ribbon 430 may be attached to the rear bus bar or the front bus bar 420 by a method such as solder, an electrically conductive adhesive, an adhesive film, or an adhesive tape.

10 schematically shows a side view of a shingled solar cell 410 and a connection ribbon 430 according to an embodiment of the present invention.

In FIG. 10, a shingled photovoltaic power generation cell 410 is disposed on the windshield 100 in a substantially horizontal direction, and a part of the connecting ribbon 430 is of the shingled photovoltaic power generation cell 410 on the left. It is connected to the front bus bar 420, and the other part of the connection ribbon 430 corresponds to a form connected to the rear bus bar of the shingled solar cell 410 on the right.

In such an embodiment, a space between adjacent shingled photovoltaic cells 410 is inevitably generated, and power generation efficiency per unit area is inevitably reduced by such space.

In addition, in this form, if the spacing between the shingled photovoltaic power generation cells 410 is reduced to increase power generation efficiency, the bending angle of the connection ribbon 430 is very rapidly increased, which causes damage to the connection ribbon 430, etc. Can cause.

11 is a schematic side view of a shingled solar cell 410 and a connection ribbon 430 according to an embodiment of the present invention.

As shown in FIG. 11, in a preferred embodiment of the present invention, the adjacent shingled photovoltaic cells 410 have portions overlapped with each other, while a side cross-section with respect to the surface of the windshield 100 Arranged to form a certain angle.

By eliminating the space between the shingled solar power generation cells 410 in this manner, power generation efficiency can be increased.

In the embodiment shown in FIG. 11, each of the connecting ribbons 430 extends from one end to the other end of the shingled photovoltaic cell 410 having a front bus bar 420 to be connected.

12 schematically shows a stacked structure of a color solar module according to an embodiment of the present invention.

As shown in Fig. 12, a color solar module applicable to a building according to an embodiment of the present invention includes a windshield 100; A color coating layer 200 disposed on a lower surface of the windshield 100 and bonded to the windshield 100; A filler layer disposed under the color coating layer 200; A plurality of shingled photovoltaic cells (410) fixedly disposed within the filler layer; It is connected to one of the two adjacent shingled photovoltaic cells 410, which is connected to the front bus bar 420, and is electrically connected to the other rear bus bar, so that the adjacent two shingled photovoltaic cells 410 are connected to each other. At least one connecting ribbon 430 electrically connected to each other; And a back sheet or tempered glass 500 disposed under the filler layer, wherein the color coating layer 200 includes TiO ₂ and polysilazane, an inorganic pigment, and a solvent.

As shown in Fig. 12, since there is no empty space between the shingled photovoltaic power generation cells 410, the power generation efficiency per unit area can be improved, and the connection ribbon 430 has no bent part, so that the connection ribbon ( 430) can exert the effect of reinforcing the durability.

13 schematically shows a side view of a shingled solar cell 410 and a connection ribbon 430 according to an embodiment of the present invention.

In the embodiment shown in FIG. 13, the adjacent shingled photovoltaic cells 410 are arranged in a form in which a side cross-section forms a certain angle with respect to the surface of the windshield 100 while overlapping each other. Has been.

On the other hand, in the embodiment shown in FIG. 13, each of the connection ribbons 430 is at one end of the first shingled photovoltaic power generation cell 410 having a front bus bar 420 to which it is connected, the connection ribbon ( It extends to the opposite end of the one end of the adjacent second shingled photovoltaic cell 410 having a rear bus bar to which 430 is connected. That is, each connecting ribbon 430 is the entire front bus bar 420 of the first shingled photovoltaic power generation cell 410 along the entire length of the adjacent two shingled photovoltaic cells 410 and the second shingled solar power generation cell 410. It is attached to the entire rear bus bar of the photovoltaic cell 410.

In such a structure, it is possible to further improve the adhesion and conductivity of the connection ribbon 430 of the front bus bar 420 and the rear bus bar in an inclined form, and having a rear bus bar to which the connection ribbon 430 is in contact. The second shingled photovoltaic cell 410 may be stably supported.

In addition, in such a structure, when EVA is used as the filler layer, the structure of each shingled photovoltaic cell 410 can be more strongly maintained.

14 schematically shows a stacked structure of a color solar module according to an embodiment of the present invention.

As shown in Fig. 14, each of the connection ribbons 430 is at one end of the first shingled solar power generation cell 410 having a front bus bar 420 to be connected, the connection ribbon 430 It extends to the opposite end of the one end of the adjacent second shingled photovoltaic power generation cell 410 having the connected rear bus bar, and in this way, the connection ribbon 430 and each shingled photovoltaic power generation cell ( 410) can exhibit the effect of improving the contact, durability, and support stability.

Meanwhile, in FIGS. 12 and 14, the thickness (a) of the shingled solar power generation cell 410 is 1 to 3 mm, the thickness (b) of the filler layer is 60 to 70 mm, and the filler layer is EVA ( It is preferably formed of ethylene vinyl acetate copolymer).

In the range of the thickness (b) of the filler layer, it is possible to maintain good support of the inclined shingled solar power generation cell 410, and when the EVA layer is formed, the shingled solar power generation cell 410 Orientation or position can be prevented from twisting In addition, when the connecting ribbon 430 extends along the entire length of the adjacent shingled photovoltaic cell 410 as shown in FIG. 14, the mutual pressing force of the connecting ribbon 430 and the front bus bar 420 and the rear bus bar By maintaining the homogeneous, it is possible to exert an effect that can further improve the durability.

According to an embodiment of the present invention, the color photovoltaic module maintains high power generation efficiency and realizes color, thereby exerting an effect of promoting aesthetic aesthetics when applied to BIPV or the like.

According to an embodiment of the present invention, by reducing the spacing between adjacent shingled photovoltaic cells, it is possible to exhibit an effect of increasing the power generation efficiency per unit area.

According to an embodiment of the present invention, it is possible to exhibit an effect of improving the durability of a color solar module by minimizing defects in a connecting ribbon connecting adjacent shingled solar power cells.

According to an embodiment of the present invention, it is possible to exhibit the effect of stably protecting the shingled solar power generation cell inside the filler layer while increasing power generation efficiency.

According to an embodiment of the present invention, by implementing the color coating layer through a spray method instead of a vacuum deposition method, the manufacturing process of the color solar module can be efficiently performed.

According to an embodiment of the present invention, an element for implementing color is implemented more simply than a conventional color photovoltaic module, so that an effect of reducing manufacturing cost can be exhibited.

According to an embodiment of the present invention, by stably maintaining an inorganic pigment that realizes color by polysilazane and protecting it from foreign substances penetrating from the outside, the color sense of the color solar module does not change over time. It can exert an effect that does not exist.

According to an embodiment of the present invention, it is possible to exert an effect of implementing various colors of color as desired through the selection of an inorganic pigment.

The description of the presented embodiments is provided to enable any person skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those of ordinary skill in the art, and general principles defined herein can be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention is not to be limited to the embodiments presented herein, but is to be construed in the widest scope consistent with the principles and novel features presented herein.

Claims (6)

As a color solar module applicable to buildings,
Windshield;
A color coating layer disposed on the lower surface of the windshield and bonded to the windshield;
A filler layer disposed under the color coating layer;
A plurality of shingled photovoltaic cells fixed and disposed within the filler layer;
One or more connecting ribbons connected to one of the two adjacent shingled photovoltaic cells and electrically connected to the other rear bus bar to electrically connect the adjacent two shingled photovoltaic cells to each other; And
Including; a back sheet or tempered glass disposed under the filler layer,
The color coating layer is _{formed by a coating composition containing TiO 2} and polysilazane, an inorganic pigment, and a solvent,
The inorganic pigment includes a ceramic pigment including _{Al 2} O ₃ and SiO ₂ having plate-shaped particles,
In the color coating layer, the lower and upper surfaces of the plate-shaped particles of _{Al 2} O ₃ and SiO ₂ are surrounded by _{TiO 2 in the binder composed of the polysilazane.} through, Al ₂ O _3, and going on the diffraction when passing through the plate-shaped particles of SiO _2, Al ₂ O ₃ and plate-shaped particles of SiO ₂ is and transmitting a part of light, Al ₂ O ₃ and plate-shaped particles and TiO of SiO _{2 By reflecting part of the light at the interface of 2} , the color of the color solar module is implemented,
The adjacent shingled photovoltaic cells have portions overlapped with each other,
Each of the connecting ribbons extends from one end in the longitudinal direction of the connecting ribbon of the shingled photovoltaic cell having a front bus bar to be connected to the other end in the longitudinal direction of the connecting ribbon, a color solar module applicable to a building.
The method according to claim 1,
_{The inorganic pigment includes a ceramic pigment including Al 2} O ₃ and SiO ₂ having plate-shaped particles of 0.02 micrometers to 20 micrometers in diameter, color solar modules applicable to buildings.
The method according to claim 1,
The adjacent shingled photovoltaic cells are arranged in a form in which a side cross-section forms a predetermined angle with respect to the surface of the windshield, a color solar module applicable to a building.
delete The method of claim 3,
Each of the connection ribbons is at one end of a first shingled solar power cell having a front bus bar to which the connection ribbon is connected, and an opposite side of the one end of an adjacent second shingled solar power generation cell having a rear bus bar to which the connection ribbon is connected. A color solar module applicable to buildings that extends to the end.
The method of claim 5,
The thickness of the shingled solar power cell is 1 to 3mm, the thickness of the filler layer is 60 to 70mm, and the filler layer is formed of EVA, a color solar module applicable to a building.

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