WO2023014099A1

WO2023014099A1 - Foldable solar module comprising solar cell groups

Info

Publication number: WO2023014099A1
Application number: PCT/KR2022/011507
Authority: WO
Inventors: 최대규
Original assignee: (주) 엔피홀딩스
Priority date: 2021-08-05
Filing date: 2022-08-03
Publication date: 2023-02-09
Also published as: KR20230021611A

Abstract

The present invention comprises a plurality of solar cell groups arranged on a base along at least a first direction, wherein one solar cell group comprises a plurality of solar cells arranged along the first direction and a second direction intersecting the first direction, and folding lines extending along the second direction are formed between adjacent solar cell groups.

Description

Foldable Solar Modules Containing Solar Cell Groups

The present invention relates to a foldable solar module and a photovoltaic power generation system using the same. In detail, it relates to a solar module forming a folding structure in units of solar cell groups, including solar cell groups, and a photovoltaic power generation system using the same.

Recently, interest in eco-friendly energy technology is increasing from the viewpoint of depletion of fossil fuels, environmental preservation, and the like. In particular, Korea, Japan, China, and the European Union have declared carbon neutrality in accordance with the UN's greenhouse gas reduction policy. Accordingly, the development of environmentally friendly energy production technologies such as wind power generation and solar power generation is being actively conducted.

Among them, photovoltaic power generation refers to a power generation method that converts sunlight into electrical energy using a photovoltaic effect or a photoelectric effect. For the photovoltaic effect, a semiconductor junction called a so-called solar cell is used. The basic principle is that electron-hole pairs are generated when sunlight with energy greater than the band gap of the semiconductor is irradiated. Solar cells were first developed in the 1950s, but their utilization was insignificant due to economic reasons. However, through the recent development of solar cell-related technology, it is gradually becoming economically feasible, and it is expected to become a major energy production technology in the near future.

Energy generation technology using solar cells is gradually being widely used not only in energy power plants, but also in households and businesses. However, a solar module including a currently used solar cell, that is, a photovoltaic power generation device has a problem in that it is difficult to transport and install due to a large size, and accordingly, manufacturing cost and installation cost are high.

Accordingly, an object to be solved by the present invention is to provide a solar module having a foldable structure and having advantages in storage and transportation. Another object of the present invention is to provide a solar module that is easy to install and can reduce installation costs.

Another problem to be solved by the present invention is to provide a photovoltaic power generation system using a solar module having a folding structure.

The tasks of the present invention are not limited to the technical tasks mentioned above, and other technical tasks not mentioned will be clearly understood by those skilled in the art from the following description.

A foldable solar module according to an embodiment of the present invention for solving the above problem includes a plurality of solar cell groups arranged on a base along at least a first direction, and one solar cell group is in the first direction and a plurality of solar cells arranged along a second direction crossing the first direction, wherein a folding line extending along the second direction is formed between adjacent solar cell groups.

In any solar cell group, at least some of the plurality of solar cells arranged in the second direction may be connected in series by a conductive wire extending in the second direction.

At an edge position of the solar cell group in the second direction, a plurality of solar cells arranged in the first direction may be connected in parallel to a connector.

The plurality of solar cell groups include a first solar cell group and a second solar cell group, the plurality of solar cells of the first solar cell group are connected to a first connector, and the plurality of solar cells of the second solar cell group The solar cells are connected to the second connector, and the first connector and the second connector may be connected in series or in parallel.

In some embodiments, glass disposed on the solar cell may be further included.

In this case, one glass may cover a plurality of solar cells belonging to one solar cell group.

An area where the solar cell groups are disposed may define a rigid area, and an area where the folding line between adjacent solar cell groups is located may define a folding area.

The rigid region and the folding region may be alternately positioned along the first direction.

In some embodiments, a bonding layer interposed between the base and the solar cell may be further included.

In the folding area, the bonding layer may be positioned on the base.

In some embodiments, the solar module may further include a water repellent layer disposed on the rear surface of the base.

A plurality of solar cells in a certain solar cell group may include solar cells having a shingled structure disposed along the second direction.

A foldable solar module according to another embodiment of the present invention for solving any of the above problems is a base including at least one of glass fiber, carbon fiber, and polymer fiber, and on one surface of the base. and a plurality of solar cells arranged in at least one direction, wherein the base includes an area that is folded in some of the areas where the plurality of solar cells are not disposed.

The base is made of a flexible material, an area where a plurality of solar cells arranged in one direction are disposed is a rigid area, an area between adjacent solar cells is a folding area, and the rigid area and the folding area are the It can be repeated alternately in one direction.

It may further include a bonding layer positioned above the base, and a plurality of glasses disposed above the bonding layer and respectively disposed on the plurality of solar cells to correspond to the plurality of solar cells.

In this case, the plurality of solar cells may be disposed in the bonding layer.

The bonding layer may further include a first bonding layer disposed between the solar cell and the base, and a second bonding layer disposed between the solar cell and the glass.

The bonding layer may include ethylene-vinyl acetate (EVA).

In addition, at least a portion of the first bonding layer and the second bonding layer may come into contact with each other so as to cover each of the plurality of solar cells.

Also, the bonding layer may have a shape that at least partially does not overlap with the plurality of glasses and covers at least a portion of side surfaces of each of the plurality of glasses.

An area of the glass on a plane may have a value equal to or greater than an area on a plane of one of the plurality of solar cells.

A planar area of the bonding layer may have a value equal to or greater than a sum of planar areas of all the plurality of glasses.

The planar area of the base may have a value equal to or greater than the sum of planar areas of the bonding layer.

A thickness of the bonding layer may have a value equal to or greater than a thickness of one of the plurality of solar cells.

A thickness of the base may have a value equal to or greater than a thickness of one of the plurality of solar cells.

A thickness of one of the plurality of glasses may have a value equal to or greater than a thickness of at least one of a thickness of one of the bonding layer and the base.

At least one of the upper surface, side surface, and bottom surface of one of the plurality of glasses may be subjected to anti-reflection treatment to form an anti-reflection layer on the surface.

The base is a fabric of warp yarns and weft yarns that cross each other and extend in different directions, and the warp yarns or weft yarns may include at least one of the glass fiber, the carbon fiber, and the polymer fiber.

The base may further include a bonding agent that penetrates into pores existing by fibers forming the base and is cured, and the bonding agent may include ethylene-vinyl acetate (EVA).

The base scatters and reflects at least a portion of the light reaching the base through the solar cell, and the outer surface of at least one of glass fibers, carbon fibers, and polymer fibers constituting the base is made of a reflective material for the scattering reflection. can be coated.

In the base, one or more holes may be formed in an area that does not overlap with the solar cell.

Further comprising a conductive wire electrically serially connecting adjacent solar cells to each other based on one direction, wherein the conductive wire at least partially overlaps the solar cell, and the conductive wire does not overlap the solar cell. The portion may abut on top of the bonding layer or be located inside the bonding layer.

A protective layer formed to protect the conductive wire may be further included on top of the conductive wire that does not overlap with the solar cell.

A cross section of the conductive wire may be circular or polygonal.

A conductive wire electrically serially connecting adjacent solar cells in one direction to each other may be further included, and the conductive wire may at least partially penetrate the base.

It may further include a plurality of solar cells disposed on the other surface of the base and arranged based on the at least one direction.

The base may have a width smaller than a length of a side surface of the solar cell positioned in a direction perpendicular to the direction in which the solar cell is arranged.

The plurality of solar cells may be arranged in two or more directions, and may be arranged in parallel with respect to the two or more directions, and the two or more directions may be orthogonal to each other.

and a glass disposed on the solar cell, and a fixing member overlapping the glass but not overlapping the solar cell, at least partially contacting an upper surface of the glass, and at least partially contacting the base in a plan view. can

Other embodiment specifics are included in the detailed description.

According to embodiments of the present invention, a folding structure may be achieved by disposing a plurality of solar cells on a base including glass fibers or the like. In addition, a stable and lightweight module structure can be formed without modularization using a separate frame or the like. Therefore, there is an advantage of increasing the degree of freedom of installation.

In addition, since the base providing a space in which the solar cell is disposed includes woven glass fibers, light passing through the solar cell can be scattered and reflected. Accordingly, the reflected light can be returned to the solar cell without interference between light transmitted through the solar cell and reflected, and light transmitted through the solar cell, thereby achieving high light utilization efficiency and energy production rate.

Effects according to the embodiments of the present invention are not limited by the contents exemplified above, and more diverse effects are included in the present specification.

1 is a perspective view of a solar module according to an embodiment of the present invention.

2 is a perspective view of a solar module according to another embodiment of the present invention.

FIG. 3 is a plan view of the solar module of FIG. 2 .

FIG. 4 is a schematic diagram showing electrical connections between a plurality of solar cells of FIG. 3 .

FIG. 5 is a partially enlarged view of the solar module of FIG. 2 .

FIG. 6 is a perspective view showing the solar module of FIG. 2 in a folded state.

7 is a view of FIG. 6 viewed from the side.

FIG. 8 is a cross-sectional view taken along the line AA' of FIG. 3 .

9 is a cross-sectional view taken along line BB′ of FIG. 3 .

FIG. 10 is a schematic diagram showing light reflection in a solar cell of the solar module of FIG. 2 .

FIG. 11 is a schematic diagram of a photovoltaic power generation system using the solar module of FIG. 2 .

12 is a plan view of a solar module according to another embodiment of the present invention.

13 is a perspective view of a solar module according to another embodiment of the present invention.

14 is a perspective view of a solar module according to another embodiment of the present invention.

15 is a schematic diagram showing electrical connections between a plurality of solar cells of a solar module according to another embodiment of the present invention.

16 is a schematic diagram showing electrical connections between a plurality of solar cells of a solar module according to another embodiment of the present invention.

17 and 18 are cross-sectional views of a solar module according to another embodiment of the present invention.

19A is a cross-sectional view of a solar module according to another embodiment of the present invention.

19B is a cross-sectional view of a portion where the conductive wire of FIG. 19A penetrates the base.

20 and 21 are cross-sectional views of a solar module according to another embodiment of the present invention.

22 and 23 are views showing a solar module according to another embodiment of the present invention.

24 is a plan view of a solar module according to another embodiment of the present invention.

25 is a cross-sectional view taken along the line A-A' of FIG. 24;

FIG. 26 is a cross-sectional view taken along line BB' of FIG. 24 .

27 is a cross-sectional view of a solar module according to another embodiment of the present invention.

28 is a cross-sectional view showing a solar module according to another embodiment of the present invention.

29 is a perspective view of a solar module according to another embodiment of the present invention.

FIG. 30 is an enlarged perspective view of FIG. 29 partially enlarged.

31 is a plan view of the solar module of FIG. 29;

32 is a schematic diagram showing electrical connections of the solar module of FIG. 29 .

33 is a perspective view showing a partially folded state of the solar module of FIG. 29;

34 is a cross-sectional view taken along the line A-A' of FIG. 31;

FIG. 35 is a cross-sectional view taken along line BB' of FIG. 31 .

36 is a perspective view of a solar module according to another embodiment of the present invention.

37 is a schematic diagram showing electrical connections of a solar module according to another embodiment of the present invention.

38A and 38B are cross-sectional views of a solar module according to another embodiment of the present invention.

39 is a perspective view of a solar module according to another embodiment of the present invention.

40 is a perspective view of a solar module according to another embodiment of the present invention.

41 is a perspective view of a solar module according to another embodiment of the present invention.

42 is a perspective view of a solar module according to another embodiment of the present invention.

43 is a schematic diagram of a photovoltaic power generation system using a solar module according to the embodiment of FIG. 41 .

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only the embodiments make the disclosure of the present invention complete, and those skilled in the art in the art to which the present invention belongs It is provided to fully inform the person of the scope of the invention, and the invention is only defined by the scope of the claims. That is, various changes may be made to the embodiments provided by the present invention. The embodiments described below are not intended to be limiting on the embodiments, and should be understood to include all modifications, equivalents or substitutes thereto.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

In this specification, 'and/or' includes each and every combination of one or more of the recited items. In addition, singular forms also include plural forms unless otherwise specified in the text. As used herein, 'comprises' and/or 'comprising' does not exclude the presence or addition of one or more other elements other than the recited elements. A numerical range expressed using 'to' indicates a numerical range including the values listed before and after it as the lower limit and the upper limit, respectively. 'About' or 'approximately' means a value or range of values within 20% of the value or range of values set forth thereafter.

The size, thickness, width, length, etc. of the components shown in the drawings may be exaggerated or reduced for convenience and clarity of explanation, so the present invention is not limited to the illustrated form.

The spatially relative terms 'above', 'upper', 'on', 'below', 'beneath', 'lower', etc. are not included in the drawings. As shown, it can be used to easily describe the correlation between one element or component and another element or component. Spatially relative terms should be understood as encompassing different orientations of elements in use in addition to the orientations shown in the figures. For example, when elements shown in the figures are turned over, elements described as 'below' or 'below' other elements may be placed 'above' the other elements. Accordingly, the exemplary term 'below' may include directions of both down and up.

Unless defined otherwise herein, the term 'fiber' or 'thread' or 'thread' refers collectively to a natural or man-made, elongated, fibrous polymeric object, consisting of a single strand or a plurality of continuous It can be used in the sense of including a filament, which is a fiber, and a spun yarn made by twisting short single fibers with each other, or a plied yarn.

In this specification, 'woven, woven fabric' refers to weaving or weaving with the intersection of warp and weft, including plain, twill and satin it means to In this specification, 'tissue' may be used as a generic term for weaving and knitting.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1 , a solar module 10 according to this embodiment includes a plurality of solar cells 200 disposed on a base 100 in a first direction X. The plurality of solar cells 200 may be electrically connected to each other through the conductive wire 300 .

1 illustrates a case in which 6 solar cells 200 are arranged, about 20 or more solar cells 200 or about 30 or more may be arranged.

2 is a perspective view of a solar module according to another embodiment of the present invention. FIG. 3 is a plan view of the solar module of FIG. 2 . FIG. 4 is a schematic diagram showing electrical connections between a plurality of solar cells of FIG. 3 . FIG. 5 is a partially enlarged view of the solar module of FIG. 2 . FIG. 6 is a perspective view showing the solar module of FIG. 2 in a folded state. 7 is a view of FIG. 6 viewed from the side. FIG. 8 is a cross-sectional view taken along line A-A' of FIG. 3 to show a first solar cell and a second solar cell. FIG. 9 is a cross-sectional view taken along line BB' of FIG. 3 to show the second solar cell. FIG. 10 is a schematic diagram showing light reflection in a solar cell of the solar module of FIG. 2 .

Referring to FIGS. 2 to 10 , the solar module 11 according to the present embodiment includes a base 100 and a plurality of solar cells 200 disposed on the base 100 .

The base 100 may have a shape substantially extending in the first direction (X), but the present invention is not limited thereto. The base 100 may provide a space in which a plurality of solar cells 200 are disposed. In some embodiments, the planar area of the base 100 may be greater than the sum of planar areas of the plurality of solar cells 200 . In addition, as will be described later, the base 100 can increase the efficiency of light use by causing scattered reflection of the transmitted light.

In an exemplary embodiment, the base 100 may include glass fibers. The base 100 may be a woven or woven fabric of fibers including glass fibers. As described above, the fabric may mean that the warp yarns extending in the warp direction and the weft yarns extending in the weft direction are woven by crossing one or more lines. The extension direction of the warp yarn and the extension direction of the weft yarn may be approximately parallel to any one of the first direction (X) and the second direction (Y), respectively, but the present invention is not limited thereto.

In this case, the weft yarn and/or the warp yarn may include glass fibers. For example, the warp and/or weft yarns may be glass fiber filaments or yarns of glass fibers. For another example, the warp and/or weft yarns may be yarns of glass fibers and regular fibers. In some embodiments, the weft yarn and/or warp yarn may further include at least one of carbon fiber and polymer fiber.

Accordingly, the surface of the base 100, specifically, the upper surface of the base 100 on which the solar cell 200 is disposed may have a predetermined roughness or roughness. The lower limit of the surface roughness of the base 100 may be about 3 μm or more, about 5 μm or more, about 10 μm or more, or about 15 μm or more. When the surface of the base 100 has a roughness greater than or equal to a predetermined level, scattering reflection may be caused. The upper limit of the surface roughness is not particularly limited, but may be about 1,000 μm or less in terms of stability of the structure stacked thereon.

In addition, glass fibers may exhibit high reflectance compared to general fiber yarns, for example, plastic-based fibers. Accordingly, the base 100 may exhibit a scattering reflectance of about 30% or more, or about 40% or more, or about 50% or more, or about 60% or more, or about 70% or more. On the other hand, the base 100 may be formed of a woven fabric to impart a flexible characteristic. In addition, a shock absorbing function may be imparted by forming the base 100 with a woven material having a predetermined thickness.

A plurality of solar cells 200 may be disposed on the base 100 . The solar cells 200 may be arranged along at least the first direction X. 2 and the like illustrate a case in which the solar cell 200 is repeatedly arranged only in the first direction (X), but the present invention is not limited thereto, and the solar cell 200 is provided in the first direction (X) and in the second direction (X). Arranged along the direction (Y) may be approximately arranged in a matrix (matrix). The solar cell 200 may have a substantially quadrangular shape on a plane. The size of any one solar cell 200 may be within the range of about 14cm×14cm to 20cm×20cm, or about 15cm×15cm to 17cm×17cm, but the present invention is not limited thereto. In addition, the solar cell 200 may mean that a solar cell having the above-described size is divided into two or more or a set of divided ones.

The solar cell 200 may have a function of converting incident light into electric energy by a photovoltaic effect or a photoelectric effect. To this end, the solar cell 200 may have a junction structure of a p-type semiconductor and an n-type semiconductor. For example, the solar cell 200 may have a structure in which a p-type semiconductor and an n-type semiconductor are stacked in a thickness direction, but the present invention is not limited thereto. Electrons generated in the solar cell 200 may pass through a finger or a finger bar and then gather at a bus bar extending in the first direction (X). The finger bar may be extended in the second direction (Y), and the bus bar may be extended in the first direction (X). Finger bars and/or bus bars may be formed through screen printing. For example, the finger bar and/or the bus bar may be made of silver paste, but the present invention is not limited thereto.

The solar cells 200 arranged along the first direction X may be connected in series. Specifically, the arrayed solar cells 200 may be connected in series through conductive wires 300 disposed on the front and/or rear surfaces. 2 and the like illustrate a case in which six solar cells 200 are arranged, but the present invention is not limited thereto, and about 20 or more solar cells 200 may be arranged, or about 30 or more.

For example, the solar cell 200 may include a first solar cell 210 and a second solar cell 220 disposed adjacent to each other in a first direction (X). In addition, the first conductive wire 310 is disposed on one surface (eg, upper surface) of the bus bar of the first solar cell 210, and the second conductive wire 310 is disposed on the other surface (eg, lower surface) of the bus bar of the second solar cell 220. 2 conductive wires 320 may be disposed. Also, a third conductive wire 330 may be disposed on one surface of the bus bar of the second solar cell 220 . That is, the first conductive wire 310 is disposed between the glass 400 and the first solar cell 210, and the second conductive wire 320 is disposed between the base 100 and the second solar cell 220. and the third conductive wire 330 may be disposed between the glass 400 and the second solar cell 220. Each of the first conductive wire 310 to the third conductive wire 330 may have a shape extending in the first direction (X). Also, cross sections of the

conductive wires

310, 320, and 330 may be circular or polygonal (eg, triangular, quadrangular, pentagonal, etc.). For example, the

conductive wires

310, 320, and 330 may be formed in a plate shape. In this case, cross sections of the

conductive wires

310, 320, and 330 may have a rectangular shape.

In addition, the first conductive wire 310 and the second conductive wire 320 connecting the adjacent first solar cell 210 and the second solar cell 220 in series are soldered to each other to form a soldering tab and electrically can be connected to The plurality of conductive wires 300 spaced apart from each other in the second direction Y may or may not be electrically connected to each other at an end of the solar module 11 .

The conductive wire may at least partially overlap the solar cell 200 . That is, the first conductive wire 310 and the second conductive wire 320 may at least partially overlap the first solar cell 210 and the second solar cell 220 in the third direction (Z). In this case, a protective layer (not shown) for protecting the conductive wire may be further disposed on the upper end of the non-overlapping portion of the conductive wire with the solar cell 200 . Such a protective layer (not shown) may prevent physical or electrical damage to the conductive wire due to a shape change such as a folding operation of the solar module 11 .

The solar module 11 according to this embodiment may have a rigid area RA and a flexible area FA (or folding area) when viewed from a plan view. Each of the areas RA and FA may partition the solar module 11 in the first direction X based on an imaginary line extending in the second direction Y when viewed from a plan view.

For example, the rigid area RA means an area where the solar cell 200 is disposed. On the other hand, the flexible area FA refers to an area where the solar cell 200 is not disposed, that is, an area where the base 100 is exposed as it does not overlap with the solar cell 200 . In other words, the flexible area FA may mean an area defined by a separation space between adjacent solar cells 200 in the first direction (X). Also, a line where a fold occurs within the flexible area FA may be referred to as a folding line, and the flexible area FA may include a folding line. In defining the areas RA and FA, there are portions where the base 100 is exposed on one side and the other side of the solar cell 200 in the second direction Y, but as described above, the areas RA, FA) means only that the solar module 11 is partitioned in the first direction (X).

In an exemplary embodiment, the solar module 11 may be folded towards one side and the other side along the first direction X. For example, as shown in FIG. 5 , the solar module 11 may be folded so that the plurality of solar cells 200 overlap each other in the third direction Z. In this case, any two solar cells 200 closest to each other in the third direction Z face each other with glass interposed therebetween, or any two solar cells 200 closest to each other in the third direction Z face each other. It can be spaced apart with the folded base 100 in between. In other words, the solar module 11 may be folded like a fan, with one side of the base 100, for example, a convexly folded portion and a concavely folded portion alternately repeated.

On the other hand, when the solar cells 200 are arranged in parallel in the second direction Y (ie, Y axis) with respect to the first direction X (ie, X axis), the second direction is based on Y Folding regions may also exist between solar cells 200 that are adjacent to each other in parallel. In this case, the flexible area (or folding area/folding line) may be formed in the first direction (X).

In the case of a conventional solar module, a module is provided in a state where a plurality of solar cells are housed in a frame, including a plurality of solar cells connected in series and/or connected in parallel as previously designed. Accordingly, since the size of the solar module is very large, not only the manufacturing cost is high, but also the storage, transportation and installation costs are very high. For example, when a solar module is installed to build a solar power generation system in an ordinary home, there is a problem that about half of the cost is transportation and installation cost, which hinders the spread of solar modules.

However, when the solar module 11 is configured to be foldable as in the present embodiment, the volume occupied by the manufactured solar module 11 can be very small. Accordingly, there is an advantage in that the cost required for storage, transportation and installation can be greatly reduced. Although the present invention is not limited thereto, when the number of solar cells 200 having a size of approximately 16cm×16cm is 6, the weight of the solar module 11 according to the present invention is about 500g or less, or about 400g or less, or about 350g or less. , or about 300 g or less, or about 250 g or less. That is, the weight of the solar module 11 may be approximately within the range of the number of solar cells 200 × (40 g to 80 g).

In addition, the solar module 11 as in the present embodiment has a structure in which the base is not made of a metal material and is relatively easy to cut. For this reason, when the solar module 11 has a structure in which electrical wiring is separable between solar cells, it may be cut into a predetermined size and used in the process of selling, supplying, installing, or operating.

In some embodiments, one or more holes 100h may be formed in a portion of the base 100 that does not overlap with the solar cell 200, for example, an edge portion of the base 100. In addition, a structure (not shown) for installation may be coupled to the hole 100h. Alternatively, when a plurality of solar modules 11 are provided, installation or coupling between the plurality of solar modules 11 may be performed using the hole 100h.

Next, the laminated structure of the solar module 11 according to the present embodiment will be described in more detail. The solar module 11 according to this embodiment may further include a glass 400 , a back sheet 600 , a first bonding layer 510 and/or a second bonding layer 520 .

The glass 400 may be positioned above the solar cell 200 . The glass 400 may serve to protect the exposed upper surface of the solar cell 200 . The glass 400 may have high light transmittance. In an exemplary embodiment, a plurality of glass 400 may be provided, and each glass 400 may be disposed for each solar cell 200 . That is, the first glass 410 is disposed to overlap the first solar cell 210, and the second glass 420 is disposed to overlap the second solar cell 220. The two glasses 420 may be spaced apart from each other in the first direction (X).

The thickness of the glass 400 may be greater than or equal to the thickness of the base 100 and the solar cell 200 . For example, the glass 400 may have a thickness of about 3 mm or less or about 2 mm or less. The thickness of the solar cell 200 may be about 300 μm or less, about 200 μm or less, or about 150 μm or less.

Also, from a plan view, an area occupied by any one glass 400 may be greater than or equal to the area of the solar cell 200 . In addition, the planar area of the bonding layers 510 and 520 may be equal to or larger than the sum of the planar areas of all the plurality of glasses 400 .

In some embodiments, the glass 400 may further include anti-reflection layers (400a, 400b, 400c) formed on the upper, lower and/or side surfaces of the glass 400 . That is, at least a portion of the glass 400 may be in a state in which an antireflection layer is formed on the surface of at least one of the top, side, and bottom surfaces of the glass 400 .

The first anti-reflection layer 400a formed on the upper surface of the glass 400 lowers the reflectance of sunlight irradiated from the upper side of the solar module 11, thereby reducing the amount of light passing through the glass 400 and reaching the solar cell 200. can increase Similarly, the second antireflection layer 400b formed on the lower surface of the glass 400 may also reduce reflection occurring at an interface between the glass 400 and the solar cell 200 .

In addition, the third antireflection layer 400c formed on the side surface of the glass 400 can prevent light interference from occurring in another adjacent solar cell 200 due to light reflection on the side surface of the glass 400 . A conventional solar module has a structure including a frame surrounding a solar cell. However, in the case of the solar module 11 according to the present invention, the frame may be omitted for weight reduction. In this case, for example, as shown in FIG. 8 , interference may be caused by light reflection occurring between adjacent units in the first direction X.

That is, when oblique light incident toward the first solar cell 210 is reflected by the side surface of the first glass 410 and directed toward the second solar cell 220, optical interference occurs in the second solar cell 220. Photoelectric conversion efficiency may decrease. However, in the case of forming the third anti-reflection layer 400c on the side of the first glass 410 facing the second glass 420 as in the present embodiment, the above problems can be solved, and the frame can be omitted to reduce weight. can be achieved

Meanwhile, a method of forming the antireflection layer is not particularly limited, but an antireflection coating may be performed or an antireflection treatment may be performed on the surface of the glass 400 .

The first bonding layer 510 may be disposed between the base 100 and the solar cell 200 to bond or combine them. The first bonding layer 510 may include a material having high light transmittance and high bonding strength. For example, the first bonding layer 510 may include ethylene-vinyl acetate (EVA), but the present invention is not limited thereto. The first bonding layer 510 may come into contact with the base 100, the second solar cell 220, and/or the second conductive wire 320 disposed between the base 100 and the solar cell 200. .

In some embodiments, in the process of forming the first bonding layer 510 , at least a portion of the composition of the first bonding layer 510 may permeate or permeate into the base 100 . That is, when the base 100 is made of fabric, a plurality of pores are formed between the fibers, and the bonding layer composition can penetrate into the pores. The composition may be ethylene vinyl acetate.

The second bonding layer 520 may be disposed between the solar cell 200 and the glass 400 to bond or combine them. The second bonding layer 520 may include the same material as or a different material from the first bonding layer 510 . For example, the second bonding layer 520 may include ethylene vinyl acetate, but the present invention is not limited thereto. The second bonding layer 520 may come into contact with the second solar cell 220, the glass 400, and/or the third conductive wire 330 disposed between the solar cell 200 and the glass 400. .

The solar cell 200 may be disposed within the bonding layers 510 and 520 and/or the solar cell 200 may be disposed between the first bonding layer 510 and the second bonding layer 520. . Due to this, the solar cell 200 may be protected by the first bonding layer 510 and the second bonding layer 520 .

In some embodiments, the first bonding layer 510 and/or the second bonding layer 520 may further include a particulate material dispersed in a polymer matrix. Examples of the particulate matter include titanium dioxide (TiO ₂ ) and the like. The light transmittance, light reflectance or light scattering ratio of the bonding layer in which the particulate matter is dispersed may be controlled.

Planar areas of the first bonding layer 510 and the second bonding layer 520 may be the same or different. In addition, the planar area of the first bonding layer 510 and/or the second bonding layer 520 may be greater than or equal to the area of the solar cell 200 or the solar cells 200 . On the other hand, the planar area of the first bonding layer 510 and/or the second bonding layer 520 may be smaller than or equal to the planar area of the base 100 . That is, the planar area of the base 100 may be equal to or greater than the sum of the planar areas of the bonding layers 510 and 520 .

The thickness of the bonding layer, for example, the thickness of the first bonding layer 510, the thickness of the second bonding layer 520, or the sum of the thicknesses of the first bonding layer 510 and the second bonding layer 520 is any solar cell It may be greater than or equal to the thickness of (200).

A back sheet 600 may be disposed on the rear surface of the base 100 . The back sheet 600 may include a polymer material. Examples of the polymer include polyethylene terephthalate (PET), but the present invention is not limited thereto. Meanwhile, the back sheet 600 may be made of ethylene-vinyl acetate (EVA). As previously described, the base 100 may be a woven fabric of fiber filaments and/or yarns. Accordingly, the first bonding layer 510 and the like may be damaged by moisture penetrating the base 100 . Therefore, the above problem can be prevented by disposing the back sheet 600 on the back surface of the base 100 .

That is, the back sheet 600 may function as a water repellent layer or a waterproof layer that prevents or repels water absorption. Although the present invention is not limited thereto, the base 100 of the solar module is folded and stored and/or transported without the back sheet in the process of storing and transporting the solar module, and the back sheet 600 is installed together in the installation process. It can be. Alternatively, for another example, the base 100 and the back sheet 600 may be integrally folded together during storage and/or transportation of the solar module.

The solar module 11 according to this embodiment can achieve weight reduction by omitting a frame and the like, and can provide advantages in terms of installation. In the prior art, a solar module in which a plurality of solar cells arranged in a matrix are combined is transported to an outer wall or a rooftop of a building using equipment such as a crane, and then combined. However, according to the present embodiment, the solar cells 200 can be arranged in a row using the solar module 11, which is small enough to be carried and carried by a person by being folded with a folding structure using the flexible base 100. there is. In addition, there is an advantage that can be easily fixed using the hole (100h) and the installation wire 190.

In addition, as the base 100 includes a material that has a high reflectance including glass fibers and causes scattering reflection, the efficiency of using light can be increased. That is, as shown in FIG. 10 , at least a portion of the sunlight, for example, the first light L1, passes through the glass 400 and reaches the solar cell 200, and photoelectric conversion is achieved by the solar cell 200. can do.

On the other hand, at least another part of the sunlight, for example, the second light L2 may reach the base 100 after passing through the solar cell 200 . At this time, when the base 100 does not have light reflectance or has low light reflectance, the second light L2 is extinguished, and light utilization efficiency cannot be increased. In addition, even when the base 100 has a predetermined light reflectance, if it does not have a high scattering reflectance, the second light L2 reflected by the base 100 and the incident first light L1 and/or the second light L1 are incident. The light utilization efficiency of the solar cell 200 may be degraded due to interference between the lights L2 . However, as in the present embodiment, the base 100 scatters and reflects the second light L2, so that the reflected second light L2 and the incident first light L1 and/or the second light ( Interference between L2) can be prevented.

As described above, it may be desirable for the base 100 to exhibit sufficient reflectivity. To this end, the base 100 may have a thickness greater than or equal to that of the solar cell 200 . As a non-limiting example, the thickness of the base 100 in the third direction Z is about 0.2 mm or more, or about 0.3 mm or more, or about 0.4 mm or more, or about 0.5 mm or more, or about 0.6 mm or more, or about 0.7 mm or greater, or about 0.8 mm or greater, or about 0.9 mm or greater. The upper limit of the thickness of the base 100 may be about 1.0 mm.

To further enhance the scattering reflection on the surface of the base 100, the surface of the base 100 may be at least partially coated with a reflective material. Specifically, when the base 100 is a woven material of at least one of glass fiber, carbon fiber, and polymer fiber as described above, the surface of each fiber body may be coated with a reflective material.

In some embodiments, base 100 may further include carbon fiber. In this case, the base 100 may be a woven material or fabric of fibers including carbon fibers. At this time, the weft yarn and/or the warp yarn constituting the base 100 may include carbon fiber. For example, the warp and/or weft yarns include glass fibers, but may further include carbon fiber filaments, or yarns of carbon fibers, or yarns of carbon and regular fibers, or yarns of carbon and glass fibers. In addition, the base 100 may further include polymer fibers.

When the base 100 includes carbon fiber, the strength of the base 100 can be further increased. The solar module 11 according to the present invention can be mainly used outdoors. Therefore, the base 100 can be prepared using carbon fiber to maintain a robust structure even in external weather or strong wind.

In addition, the carbon fiber may have relatively low light reflectance and high light absorbance. For example, the light reflectance of carbon fiber may be lower than that of glass fiber, and the light absorbance may be higher than that of glass fiber. Although the present invention is not limited thereto, when the base 100 is made of only glass fibers, the above-described second light L2 is transmitted in a horizontal direction within the base 100, for example, in the first direction X and the second direction ( Y) may be guided in the direction of the plane to which it belongs. Accordingly, since the base 100 includes carbon fiber having a predetermined light absorptivity, it is possible to prevent the second light L2 from being guided within the base 100 .

In some embodiments, the carbon fibers may have a shape extending in the second direction Y within the base 100 . By arranging the carbon fibers in the second direction (Y), it is possible to more effectively prevent light from being unintentionally guided along the second direction (Y).

11 is a schematic diagram of a solar power generation system according to an embodiment of the present invention.

Referring to FIG. 11 , the photovoltaic power generation system 1 according to the present embodiment is disposed on top of the post 30a and the post 30a protruding in the third direction (Z), and has a substantially 'square' shape. It may include a frame (30b) of. The frame 30b may be tilted around the post 30a to adjust the angle.

The frame 30b may include an upper bar 31 and a lower bar 32 . The upper bar 31 and the lower bar 32 may each have a shape extending in the second direction Y. One end and the other end of the solar module 11 according to the embodiment of FIG. 2 may be coupled to the upper bar 31 and the lower bar 32, respectively. The coupling of the solar module 11 may use the aforementioned installation wire or the like, but the present invention is not limited thereto.

As in the present embodiment, the solar module 11 includes a plurality of solar cells 200 arranged in one direction, but the plurality of solar modules 11 are arranged along the second direction Y to form a substantially matrix-arranged solar system. Cells 200 may be configured. In addition, any one of the solar modules 11 is foldable, and transfer and installation are easy, so there is an advantage in that the photovoltaic power generation system 1 of the present embodiment can be easily installed.

Hereinafter, other embodiments of the present invention will be described. However, a description of the same or extremely similar configuration as the above-described embodiment will be omitted, and this will be easily understood by those skilled in the art from the accompanying drawings.

Referring to FIG. 12 , the solar module 12 according to the present embodiment includes a base 100 and a plurality of solar cells 200 arranged on the base 100 in a first direction X. The plurality of solar cells 200 may be electrically connected in series through the conductive wire 300 .

In addition, the solar module 12 may have a rigid area RA and flexible areas FA1 and FA2 when viewed from a plan view. Each of the regions RA, FA1, and FA2 may partition the solar module 12 in the first direction (X) based on an imaginary line extending in the second direction (Y) when viewed from a plan view.

The rigid area RA means an area where the solar cell 200 is disposed. On the other hand, the flexible areas FA1 and FA2 refer to areas where the solar cell 200 is not disposed and the base 100 is exposed. In an exemplary embodiment, the flexible areas FA1 and FA2 include a first flexible area FA1 having a relatively large width in the first direction X and a second flexible area FA2 having a relatively small width. can include In this case, the first flexible area FA1 and the second flexible area FA2 may be alternately repeated. Specifically, in some parts, the rigid area RA, the first flexible area FA1, the rigid area RA, and the second flexible area FA2 may form a repeating unit and be repeated.

As described above, in the solar module 12 according to the present embodiment, one surface of the base 100 may be repeatedly folded convexly and concavely along the first direction X. One surface of the base 100, for example, a convexly folded portion and a concavely folded portion of the upper surface may be alternately repeated. In this case, for example, tensile force may be differently applied to the concave-folded portion and the convex-folded portion according to the thicknesses of the base 100, the solar cell 200, and the glass. As a non-limiting example, when the thickness of the glass is greater than the sum of the thickness of the solar cell 200 and the thickness of the base 100, the portion in which one surface of the base 100 is concavely folded is more concave than the portion in which it is convex. Having a wider width may be advantageous in terms of durability. Accordingly, in this case, the concavely folded portion may correspond to the first flexible area FA1 and the convexly folded portion may correspond to the second flexible area FA2, but the present invention is not limited thereto.

As in the present embodiment, a more stable folding structure may be possible by configuring the first flexible area FA1 and the second flexible area FA2 with different widths. In addition, through this, damage to the solar module 12 can be prevented despite repeated folding.

Referring to FIG. 13 , the solar module 13 according to the present embodiment includes a base 103 and a plurality of solar cells 200 arranged on the base 103 in a first direction X. In addition, the base 103 has a hole 103h, and the hole 103h at least partially overlaps the solar cell 200 in the second direction Y, which is different from the embodiment of FIG. 2 .

The hole 103h may be formed along an edge of the base 103 that does not overlap with the solar cell 200 . In particular, along both edges of the base 103 in the second direction (Y), a plurality of holes (103h) may be spaced apart from each other in the first direction (X).

The base 103 of the solar module 13 according to this embodiment has a plurality of holes 103h, and can be easily installed in various structures using the holes 103h.

Referring to FIG. 14, the solar module 14 according to this embodiment is different from the embodiment of FIG. 2 in that it further includes an adhesive layer 700 disposed on the back surface of the base 100 and the back sheet 600. point.

The solar module 14 according to this embodiment can be easily installed on various structures using the adhesive layer 700 .

Referring to FIG. 15 , the solar module 15 according to the present embodiment includes a plurality of solar cells 200 arranged in a first direction X on a base, and includes solar cells 200 arranged in the first direction X. The cell 200 is different from the embodiment of FIG. 2 in that the cells 200 are connected in series using one electrical wire extending in the first direction X, for example, a conductive wire.

That is, in the case of the embodiment of FIG. 2 and the like, one conductive wire connects two adjacent solar cells, and this structure is repeated, but the solar module 15 according to this embodiment uses one conductive wire to connect three or more, Four or more, five or more, or six or more solar cells 200 may be connected in series.

The junction box may be disposed on the rear surface of the base 100 overlapping any solar cell 200, but the present invention is not limited thereto. In a non-limiting example, the junction box may be electrically connected to each of the two solar cells 200 at both ends. In this case, a wire connecting the junction box and the solar cell may pass through the base 100 at least partially.

Referring to FIG. 16 , the solar module 16 according to the present embodiment includes a plurality of solar cells 200 arranged in a first direction (X) and a second direction (Y) on a base. 16 illustrates a matrix arrangement in which six are arranged in the first direction (X) and at least two are arranged in the second direction (Y).

In this case, an electrical wire, for example, a first electrical wire may connect the plurality of solar cells 200 arranged in the first direction (X) in series. In addition, another electrical wire, for example, a second electrical wire may connect the plurality of solar cells 200 arranged in the first direction (X) in series. In this case, the first electrical wiring may correspond to the (+) electrode wiring and the second electrical wiring may correspond to the (-) electrode wiring, but the present invention is not limited thereto.

17 and 18 are cross-sectional views of a solar module according to another embodiment of the present invention, wherein FIG. 17 is a cross-sectional view showing a position corresponding to that of FIG. 8, and FIG. 18 is a cross-sectional view showing a position corresponding to that of FIG.

Referring to FIGS. 17 and 18 , the solar module 17 according to the present embodiment includes a plurality of

solar cells

210 and 220 arranged between the base 100 in the first direction X. The

solar cells

210 and 220 may include a first solar cell 210 and a second solar cell 220 that are most adjacently spaced apart in the first direction (X). In addition, the

glasses

410 and 420 may include a first glass 410 and a second glass 420 that are closest to each other and spaced apart in the first direction (X). As described above, the first conductive wire 310 is disposed on one surface of the first solar cell 210, the second conductive wire 320 is disposed on the other surface of the second solar cell 220, and the second solar cell A third conductive wire 330 may be disposed on one surface of 220 .

In addition, the solar module 17 includes a first bonding layer 517 interposed between the base 100 and the

solar cells

210 and 220 and interposed between the

solar cells

210 and 220 and the

glass

410 and 420. A second bonding layer 527 may be further included. In an exemplary embodiment, the first bonding layer 517 and/or the second bonding layer 527 may cover the plurality of

solar cells

210 and 220 . That is, the first bonding layer 517 and the second bonding layer 527 are substantially extended in the first direction (X), and one first bonding layer 517 and/or one second bonding layer ( 527 may cover the plurality of

solar cells

210 and 220 and the

glass

410 and 420 .

In this case, the first bonding layer 517 and/or the second bonding layer 527 may at least partially overlap the

solar cells

210 and 220 and the

glasses

410 and 420 in the third direction (Z). . In addition, the first bonding layer 517 and the second bonding layer 527 may come into contact with the

conductive wires

310, 320, and 330 to protect them. Alternatively, a portion of the conductive wire that does not overlap with the solar cell 200 may be located inside the bonding layer. In other words, in a region between the first solar cell 210 and the second solar cell 220 that are closest to each other, one conductive wire 310 may overlap another layer. The other layer may be the first bonding layer 517 and/or the second bonding layer 527 .

In some embodiments, at least a portion of the first bonding layer 517 and/or the second bonding layer 527 may come into contact with each other so as to cover the solar cell 200 . In this case, at least one of the first bonding layer 517 and the second bonding layer 527 may cover at least a portion of side surfaces of the

solar cells

210 and 220 . For example, the second bonding layer 527 may cover side surfaces of the

solar cells

210 and 220 . Specifically, the second bonding layer 527 may be positioned between the first solar cell 210 and the second solar cell 220 spaced apart from each other in the first direction (X). Furthermore, the second bonding layer 527 may come into contact with side surfaces of the first solar cell 210 and the second solar cell 220 .

According to this embodiment, the side surfaces of the

solar cells

210 and 220 may be protected using the second bonding layer 527 . In addition, the

conductive wires

310 , 320 , and 330 exposed by non-overlapping with the

solar cells

210 and 220 may be protected by using the second bonding layer 527 . As described above, the solar module according to the present invention does not have a frame or the like and can achieve weight reduction. However, since the frame does not exist, it is necessary to more robustly protect the

solar cells

210 and 220 . Therefore, since the second bonding layer 527 is used as a bonding member between the

solar cells

210 and 220 and the

glass

410 and 420 and at the same time is used to protect the exposed side surfaces of the

solar cells

210 and 220, the frame can be omitted. can

It is as described above that a back sheet (not shown) may be disposed on the rear surface of the base 100 .

FIG. 19A is a cross-sectional view of a solar module according to another embodiment of the present invention, showing a position corresponding to that of FIG. 8 . FIG. 19B is a cross-sectional view in a first direction (X) of a portion where the conductive wire of FIG. 19A penetrates the base.

Referring to FIGS. 19A and 19B , the solar module 18 according to the present embodiment differs from the embodiment of FIG. 17 in that at least a portion of the

conductive wires

310, 320, and 330 penetrate into the base 100. am.

As described above, the first conductive wire 310 extending on one surface of the first solar cell 210 and the second conductive wire 320 extending on the other surface of the second solar cell 220 may meet each other and be soldered and tapped. . At this time, a portion of the

conductive wires

310, 320, and 330 including the first conductive wire 310 and the second conductive wire 320, specifically, the conductive wire 310 that does not overlap with the

solar cells

210 and 220, A portion of 320 and 330 may penetrate into base 100 . Through this, the

conductive wires

310, 320, and 330 exposed to the outside can be more firmly protected. On the other hand, tabbed conductive wire portions, that is, conductive wire portions electrically connected to each other may be located outside the base 100 instead of inside the base 100 .

In addition, the

conductive wires

310 , 320 , and 330 penetrating the base 100 within the flexible region of the solar module 18 can relieve the flexible region from being twisted by external wind.

As described above, the base 100 may be a weave of warp and weft yarns, for example, fiber filaments or yarns extending in a first direction (X) and fiber filaments or yarns extending in a second direction (Y). In an exemplary embodiment, the

conductive wires

310, 320, and 330 may be woven together with the warp and weft yarns of the base 100, or may be bonded together by passing between grids of the woven base 100. For example, the

conductive wires

310 , 320 , and 330 may be combined by crossing one by one a warp extending in the second direction (Y).

In some embodiments, the

conductive wires

310, 320, and 330 may further include an insulating coating layer 390 formed on surfaces. The insulating coating layer 390 may prevent current flowing along the

conductive wires

310 , 320 , and 330 from leaking into the base 100 .

20 and 21 are cross-sectional views of a solar module according to another embodiment of the present invention, wherein FIG. 20 is a cross-sectional view showing a position corresponding to that of FIG. 17, and FIG. 21 is a cross-sectional view showing a position corresponding to that of FIG. 18.

20 and 21, in the solar module 19 according to the present embodiment, the

solar cells

210, 220, 230, and 240 are disposed on one side and the other side of the base 100, as shown in FIG. It is different from the Example.

In an exemplary embodiment, the first solar cell 210 and the second solar cell 220 are disposed on one surface, eg, the upper surface, of the base 100, and the third solar cell 230 and the fourth solar cell 230 and the fourth solar cell 220 are disposed on the other surface, eg, the lower surface. A solar cell 240 may be disposed. To this end, conductive wires 300 may be disposed on both one side and the other side of the base 100 . Also, to protect the solar cell, the first glass 410 and the second glass 420 may be disposed on one surface, and the third glass 430 and fourth glass 440 may be disposed on the other surface.

The

solar cells

210 and 220 located on one side of the base 100 and the

solar cells

230 and 240 located on the other side of the base 100 may or may not be electrically connected to each other.

The solar module 19 according to this embodiment can be used as a double-sided solar module. In the case of a conventional bifacial solar module, the installation cost is very high due to its weight, etc., and it is difficult to use it practically. However, the solar module 19 according to the present embodiment has the advantage of being light in weight and easy to install, so that it can be used as a double-sided solar module 19 as in the present embodiment.

22 and 23 are views illustrating a solar module according to another embodiment of the present invention, wherein FIG. 22 is a perspective view of the solar module, and FIG. 23 is a cross-sectional view taken along line BB′ of FIG. 22 .

22 and 23 , in the solar module 20 according to the present embodiment, the width of the base 110 in the second direction Y is the width of the solar cell 200 in the second direction Y. Smaller points are different from the examples of FIG. 2 and the like.

In this embodiment, the planar area of the base 110 may be larger than, equal to, or smaller than the sum of planar areas occupied by the plurality of solar cells 200 . As the width of the base 110 decreases, the lower surface of the first bonding layer 510 may be partially exposed.

In an exemplary embodiment, the width of the base 110 in the second direction (Y) may be smaller than the width or side length of the solar cell 200 in the second direction (Y).

24 is a plan view of a solar module according to another embodiment of the present invention, and FIG. 25 is a cross-sectional view taken along the line AA' of FIG. 24 . FIG. 26 is a cross-sectional view taken along line BB′ of FIG. 24 to show the fixing member 800 .

24 to 26, the solar module 21 according to the present embodiment further includes a base 100, a solar cell 200 disposed on the base 100, and a glass 400, and a fixing member (800) may be further included.

In some embodiments, the width of the glass 400 in the first direction X and/or the second direction Y may be greater than that of the solar cell 200 . In this case, the lower surface of the glass 400 that does not overlap with the solar cell 200 may be partially exposed or not exposed.

A fixing member 800 may be disposed on the glass 400 . The fixing member 800 may non-overlap with the solar cell 200 . The fixing member 800 may have a substantially 'c' shape. That is, the fixing member 800 may include a horizontally extending portion and a vertical or inclined portion.

The horizontally extended portion of the fixing member 800 overlaps the glass 400 but does not overlap the solar cell 200 and may be brought into contact with the upper surface of the glass 400 . In addition, the vertically extending portion of the fixing member 800 may substantially non-overlap with the glass 400 and the solar cell 200 in the third direction (Z). On the other hand, the vertically extending portion of the fixing member 800 may overlap the glass 400 and the solar cell 200 in the horizontal direction. Also, a vertically extending portion of the fixing member 800 may come into contact with the base 100 . In an exemplary embodiment, the vertically extending portion of the fixing member 800 at least partially penetrates the base 100 and may further protrude onto the lower surface of the base 100 .

The fixing member 800 may be made of metal, plastic synthetic resin such as nylon, but the present invention is not limited thereto, and the fixing member 800 has a predetermined strength and prevents the glass 400 from the base 100. It is not particularly limited as long as it can be fixed so as not to come off. To this end, the fixing member 800 may be made of a material having elasticity or restoring force.

In addition, the fixing member 800 has various other shapes such as a 'C' shape as well as a 'ㅁ' shape and a 'ㅇ' shape so that other structures including the glass 400 can be fixed together on the base 100. can have

27 is a cross-sectional view of a solar module according to another embodiment of the present invention, showing a position corresponding to that of FIG. 9 .

Referring to FIG. 27 , the solar module 22 according to the present embodiment includes a first bonding layer 510, a second bonding layer 520, a solar cell 200, and glass 400 disposed on a base 100. ), but is different from the above-described embodiment in that the first bonding layer 510 and/or the second bonding layer 520 contact and wrap or cover the side surface of the glass 400. That is, at least some of the bonding layers may overlap the glass 400 in a horizontal direction.

27 illustrates a case where the second bonding layer 520 is extended to cover the side surface of the glass 400, but in another embodiment, the first bonding layer 510 may cover the side surface of the glass 400. there is.

Although not represented in the drawing, the solar module 22 further includes a fixing member (not shown) according to the above-described embodiment, and the fixing member may come into contact with the extended second bonding layer 520 and the like.

28 is a cross-sectional view showing a solar module according to another embodiment of the present invention, and is a cross-sectional view showing a position corresponding to FIG. 18 .

Referring to FIG. 28 , in the solar module 23 according to the present embodiment, both ends of the base 113 in the second direction Y are rolled up, and thus the base 113 is at least partially formed of the solar cell 200. It is different from the above-described embodiment in that the side surface in the second direction (Y) is covered.

That is, the base 113 may overlap at least one of the solar cell 200 , the first bonding layer 517 , the second bonding layer 527 , and the glass 420 in a horizontal direction. Although not represented in the drawing, in another embodiment, the base 113 may be rolled up and positioned at a higher level than the glass 420 .

29 is a perspective view of a solar module according to another embodiment of the present invention. FIG. 30 is an enlarged perspective view of FIG. 29 partially enlarged. 31 is a plan view of the solar module of FIG. 29; 32 is a schematic diagram showing electrical connections of the solar module of FIG. 29 . 33 is a perspective view showing a partially folded state of the solar module of FIG. 29; FIG. 34 is a cross-sectional view taken along line A-A' of FIG. 31 , and is a cross-sectional view taken in a first direction (X) to express four solar cells and flexible regions that are closest to each other. FIG. 35 is a cross-sectional view taken along line BB' of FIG. 31, and is a cross-sectional view taken in a second direction (Y) so as to express two adjacent solar cells.

29 to 35, the solar module 31 according to the present embodiment includes solar cells 200 disposed on a base 100, and the plurality of solar cells 200 constitute one solar cell group. 250 is formed and the solar cell groups 250 are arranged along the first direction X at a predetermined distance apart from those of the above-described embodiments.

Since the base 100, the solar cell 200, the glass 400, and the first bonding layer 510 and the second bonding layer 520 interposed therebetween have been described in detail above, overlapping descriptions are omitted. And the arrangement of the solar cell 200 and the solar cell group 250 will be described below.

One solar cell group 250 may include a plurality of solar cells 200 . 29 and the like show that 10 solar cells 200 are arranged in a first direction (X) and 10 in a second direction (Y), so that 100 solar cells 200 form one solar cell group 250. Although the case is exemplified, the present invention is not limited thereto.

One solar cell group 250 can be distinguished from other solar cell groups 250 according to the arrangement regularity of the solar cells 200 belonging to the solar cell group 250 . For example, 100 solar cells 200 belonging to the first solar cell group 250a may be spaced apart from each other at substantially equal intervals along the first direction X and the second direction Y. However, the separation distance D _F between the first solar cell group 250a and the second solar cell group 250b, that is, the width D _F of the flexible area FA in the first direction X, It may be larger than the separation distance D ₂₀₀ between the solar cells 200 belonging to the first solar cell group 250a.

As a non-limiting example, the separation distance D _F between the solar cell groups 250 may be about 50 mm or more, about 100 mm or more, about 150 mm or more, or about 200 mm or more. The upper limit of the separation distance (D _F ) is not particularly limited, but may be, for example, about 1,000 mm or less.

In addition, the separation distance (D 200 ) between the solar cells 200 in any one solar cell group 250 in the first direction (X) and/or the second direction (Y) is about 10 _mm or more, or about 20 mm or greater than about 30 mm, or greater than about 40 mm, or greater than about 50 mm. The upper limit of the separation distance (D ₂₀₀ ) may be about 200 mm.

According to the above arrangement, the width in the first direction (X) and/or the width in the second direction (Y) of any one solar cell group 250 may be in the range of about 1,800 mm to 2,500 mm, but this The invention is not limited thereto. In some embodiments, the width of the solar cell group 250 and the width of the flexible area FA may have a predetermined relationship. For example, the width of the solar cell group 250 in the first direction X is about 5 times or more, about 6 times or more, about 7 times or more, or about 8 times or more of the width of the flexible area FA. , or about 9 times or more, or about 10 times or more. If it is smaller than the above range, that is, if the width of the flexible area FA is relatively large, the area efficiency of the solar cell 200 compared to the area of the base 100 is lowered, and when the solar module 31 is folded, it is not supported. The part that doesn't get bigger.

The solar module 31 according to this embodiment may have a rigid area RA and a flexible area FA (or folding area) when viewed from a plan view. Each of the regions RA and FA may partition the solar module 31 in the first direction X based on an imaginary line extending in the second direction Y when viewed from a plan view.

For example, the rigid area RA means an area where the solar cell group 250 is disposed. Even when the solar module 31 of this embodiment is folded, the rigid area RA is not substantially folded and may not contribute to the folding structure. On the other hand, the flexible area FA refers to an area in which the solar cell group 250 is not disposed, that is, an area that does not overlap with the solar cell group 250 and is exposed. In other words, the flexible area FA may refer to an area defined by a separation space between solar cell groups 250 closest to each other in the first direction X. Accordingly, the rigid area RA and the flexible area FA may be alternately defined along the first direction X.

In addition, a line where a fold occurs within the flexible area FA may be referred to as a folding line FL, and the folding line FL may refer to a virtual line extending substantially in the second direction Y. The folding line FL may be positioned within the flexible area FA.

In the solar module 31 according to the present embodiment, the base 100 may be folded to one side and the other side based on the folding line FL. For example, as shown in FIG. 33 , the upper surface of the base 100 forms a convexly folded portion and a concavely folded portion, and can be folded like a fan.

In some embodiments, as described above, the first bonding layer 510 may couple the base 100 and one or more solar cells 200 . In this case, the first bonding layer 510 may be disposed to cover the plurality of solar cells 200 . Accordingly, the first bonding layer 510 may at least partially overlap the solar cell 200 and/or the glass 400 in the third direction (Z).

At least one of the first bonding layer 510 and/or the second bonding layer 520 may be disposed in the flexible area FA. As described above, the solar cell 200 and the glass 400 may not be disposed in the flexible area FA. However, the first bonding layer 510 may be disposed on the base 100 in the flexible area FA. The first bonding layer 510 (and/or the second bonding layer 520) may function as a protective layer for protecting the base 100 repeatedly folded by the folding line FL.

Hereinafter, connection between the solar cell 200 belonging to any one solar cell group 250 and the conductive wire 300 will be described.

As described above, the solar cell group 250 may include a plurality of solar cells 200 arranged in the first direction (X) and the second direction (Y). At this time, at least some or all of the plurality of solar cells 200 arranged in the second direction Y may be serially connected to each other. The series connection may use a conductive wire 300 . As described above, the conductive wire 300 may be respectively positioned on the upper and lower surfaces of any solar cell 200 . The series-connected conductive wires 300 protrude to one edge of the solar cell 200 in the second direction (Y), and may form a connection portion 350 for parallel connection to be described later.

On the other hand, among the solar cells 200 in a solar cell group 250, the solar cells 200 arranged in the first direction X may be connected in parallel to each other. As will be described above, the series-connected conductive wires 300 may be positioned at any edge of the solar cell group 250 in the second direction (Y) to form a connection portion 350 with each other. Also, the connection unit 350 may be electrically connected to an electrical connection member such as a junction box (JB) or an electrical connector 950 .

That is, the plurality of solar cells 200 in one solar cell group 250 are electrically connected to each other in series and parallel, and may be electrically connected to one connector as a non-limiting example.

In an exemplary embodiment, all of the solar cells 200 of the first solar cell group 250a are connected to the first connector 950a, and all of the solar cells 200 of the second solar cell group 250b are connected to the second connector 950a. It may be connected to the connector 950b. Also, the first connector 950a and the second connector 950b may be connected in series to each other or connected in parallel via another connector (not shown).

Meanwhile, the glass 400 may be disposed on each solar cell 200 . That is, the solar cell 200 in one solar cell group 250 may be covered by a plurality of glasses 400 . In other words, a plurality of glasses 400 arranged in the first direction (X) and the second direction (Y) may be disposed in one solar cell group 250 or in the rigid area RA.

Although not represented in other drawings, it is of course that the structure or technical characteristics of the solar module according to the above-described embodiments may be applied to the solar module 31 according to the present embodiment. For example, a back sheet (reference numeral 600 in FIG. 2 ) may be disposed on the rear surface of the base 100 of the solar module 31 . Alternatively, the upper, side and/or lower surface of the glass 400 may be in a state in which an antireflection layer is formed. Alternatively, a separate bonding layer (reference numeral 700 in FIG. 14 ) may be disposed on the rear surface of the base 100 . Alternatively, the conductive wire 300 may at least partially penetrate the base 100 . Alternatively, a solar cell and glass may be disposed not only on one side of the base 100 but also on the other side. Alternatively, the width of the base 100 in the second direction (Y) may be smaller than or equal to the width of any solar cell group 250 . Alternatively, the glass 400 may be more firmly fixed on the base 100 by further including a fixing member (reference numeral 800 in FIG. 24 ).

36 is a perspective view illustrating a solar module according to another embodiment of the present invention.

Referring to FIG. 36, the solar module 31′ according to the present embodiment includes a base 100 and a plurality of

solar cell groups

250a and 250b spaced apart from each other in a first direction X on the base 100. Including, the back sheet 600 disposed on the other surface of the base 100 may be further included.

Any

solar cell group

250a or 250b may include a plurality of solar cells 200 arranged in a first direction (X) and a second direction (Y). Since the

solar cell groups

250a and 250b and the solar cell 200 have been described in detail along with FIG. 29 and the like, overlapping descriptions will be omitted.

In an exemplary embodiment, in any one of the

solar cell groups

250a and 250b, the solar cells 200 arranged in the second direction Y may be inclined in the second direction Y, respectively. In spite of the inclined arrangement of the solar cells 200 , upper and/or lower surfaces of the glasses (not shown) may be substantially parallel to the upper and/or lower surfaces of the base 100 .

The solar cells 200 may at least partially overlap each other in the third direction (Z). Specifically, the solar cells 200 arranged in the second direction Y may be serially connected to each other using connection electrodes (not shown). For example, it may be electrically connected to the lower surface of another solar cell 200 disposed on the other side in the second direction Y through a connection electrode on the upper surface of one solar cell 200 disposed on one side in the second direction Y. can The connection electrode may contact the bus bars on the upper and lower surfaces of the solar cell 200, but the present invention is not limited thereto. Accordingly, the plurality of solar cells 200 disposed in the second direction Y may be connected in series to each other.

As such, the shingled structure disclosed in FIG. 36 means that two or more unit solar cells form one cell by physically overlapping and connecting at least some areas or electrically connecting to each other.

Also, in the shingled structure, the lower surface of the cell and the upper surface of the cell may contact each other between the overlapping unit solar cells, and may be electrically connected using contact surfaces between the unit solar cells.

Referring to FIG. 37 , the solar module 32 according to the present embodiment includes solar cells disposed on a base, and a plurality of solar cells may form one

solar cell group

252a, 252b, and 252c. .

The plurality of

solar cell groups

252a, 252b, and 252c include a first solar cell group 252a, a second solar cell group 252b, and a third solar cell group 252c that are closest to each other in the first direction (X). can include At this time, the first solar cell group 252a is connected to the first connector 952a, the second solar cell group 252b is connected to the second connector 952b, and the third solar cell group 252c is connected to the second connector 952b. 3 can be connected to the connector 952c. Electrical connections between certain

solar cell groups

252a, 252b, and 252c and certain connectors have been described together with FIG. 32 and the like, and thus duplicate descriptions are omitted.

In an exemplary embodiment, the first connector 952a and the second connector 952b may be serially connected to each other. On the other hand, the first connector 952a and the third connector 952c or the second connector 952b and the third connector 952c may be connected in parallel to each other. That is, the solar module 32 according to the present embodiment may connect the

solar cell groups

252a, 252b, and 252c arranged in parallel and in series to each other.

38A and 38B are cross-sectional views of a solar module according to another embodiment of the present invention, and are cross-sectional views showing positions corresponding to those of FIGS. 34 and 35, respectively.

Referring to FIGS. 38A and 38B , in the solar module 33 according to the present embodiment, a plurality of solar cells 200 form a

solar cell group

250a and 250b, and the solar cell along the first

direction X Groups

250a and 250b are repeatedly arranged, and one glass 400 covers a plurality of solar cells 200 belonging to a

certain cell group

250a or 250b, a solar module according to the embodiment of FIG. 34 , etc. is different from

The area where the

solar cell groups

250a and 250b are disposed forms a rigid area, and no folding line is located. Therefore, even if one glass 400 is disposed on the plurality of solar cells 200, the folding structure of the solar module 33 according to the present embodiment is not disturbed.

Referring to FIG. 39 , the solar module 34 according to the present embodiment includes a plurality of solar cell groups 254 arranged in a first direction X, and the solar cells in one solar cell group 254 ( 200) is different from the solar module according to the embodiment such as FIG.

Accordingly, the width of the solar cell group 254 in the first direction (X) may be greater than the width in the second direction (Y). However, the present invention is not limited thereto, and in an arrangement of a plurality of solar cells 200 within a certain solar cell group 254, the separation distance between the solar cells 200 in the first direction (X) and the second The separation distance in the direction Y may be different.

Referring to FIG. 40 , the solar module 35 according to the present embodiment includes a plurality of solar cell groups 255 arranged in a first direction X, and the solar cells in one solar cell group 255 ( 200) is different from the solar module according to the embodiment such as FIG.

Accordingly, the width of the solar cell group 255 in the second direction (Y) may be greater than the width in the first direction (X). However, the present invention is not limited thereto, and in an arrangement of a plurality of solar cells 200 within a certain solar cell group 255, the separation distance between the solar cells 200 in the first direction (X) and the second The separation distance in the direction Y may be different.

Referring to FIG. 41 , the solar module 36 according to the present embodiment may include two

solar cell groups

250a and 250b arranged in a first direction X. In addition, an installation unit 990 may be coupled to the base 100 .

The base 100 may have one or more installation holes 100h. Specifically, the installation hole 100h may be formed in any part of the base 100 where the

solar cell groups

250a and 250b do not overlap. 41 illustrates a case in which four installation holes 100h are formed near each corner of the base 100.

An installation unit 990, for example, an installation wire unit, may be coupled to the installation hole 100h. A total of four installation units 990 may be coupled to each installation hole 100h, but the present invention is not limited thereto.

In an exemplary embodiment, the installation unit 990 includes an installation wire 990a and a hook 990b, and may further include a length adjusting member 990c. Hook (990b) may be connected to the end of the installation wire (990a). The hook 990b may have a substantially ring shape and may be easily installed and removed from an installation frame such as a rod shape. The hook 990b may be in the form of a karabiner, but the present invention is not limited thereto. In another embodiment, the installation unit 990 may employ another type of coupling member instead of the hook 990b.

The length adjusting member 990c may be a component for adjusting the separation distance between the base 100 and the hook 990b. For example, the length adjusting member (990c) may be a wire fastening structure in the form of a ratchet (ratchet), but the present invention is not limited thereto, and directly adjusts the length of the installation wire (990a), or the base ( 100) and the hook 990b, the method is not particularly limited as long as it can be adjusted.

As described above, the base 100 is not made of a metal material, but is made of a fiber material such as glass fiber, carbon fiber, and/or polymer fiber, and can be relatively easily cut or cut. Due to this, the solar module 36 may be used after being cut into a predetermined size in the course of sales, supply, installation, and/or operation when the electrical wiring has a structure in which solar cells can be separated from each other. For example, the solar module 36 may be cut into various sizes, and may be cut within a flexible area or along a folding line. This will be described later together with FIG. 42 .

Referring to FIG. 42 , the solar module 37 according to the present embodiment is not a plurality of solar cell groups arranged, but a plurality of solar cells 200 arranged in a first direction X and a second direction Y. It is different from the solar module according to the embodiment of FIG. 41 in that it consists of only one solar cell group including .

After the solar module according to the embodiment of FIG. 29 described above is manufactured, it may be used by cutting and/or forming an installation hole as necessary. The solar module 37 according to the embodiment of FIG. 42 is cut to include only one solar cell group instead of a plurality of solar cell groups as needed, forms an installation hole, and is combined with the installation unit 990. do.

Referring to FIG. 43 , the photovoltaic power generation system 20 according to the present embodiment may mount a solar module 36 on posts P1 , P2 , P3 , and P4 built on the sea. For example, the first post P1 and the second post P2 may have a relatively low height, and the third post P3 and the fourth post P4 may have a relatively high height.

At this time, the post wire 80 may be connected between the first post P1 and the second post P2 and between the third post P3 and the fourth post P4. Also, the hook 990b of the installation unit 990 of the solar module 36 may be fixed to the post wire 80. Accordingly, the solar module 36 including solar cell groups arranged in one direction may be installed with an inclination along the one direction.

In some embodiments, a hook fixing member 90 may be disposed near the hook 990b coupled to the post wire 80 . The hook fixing member 90 may be inserted into the post wire 80 like the hook 990b. The hook fixing member 90 can mitigate the displacement of the hook 990b coupled to the post wire 80 and the solar module 36 even under an environment such as strong wind.

In addition, the hook fixing member 90 may be configured to flicker by including a light emitting device such as an LED. By using this, it is possible to prevent a ship or aircraft from colliding with the photovoltaic power generation system 2 in which the solar module 36 is installed in an environment such as nighttime or rainy weather.

Alternatively, a light emitting device such as an LED may be inserted between the solar cells 200 or near the folding line to make them flicker.

Although the above has been described with reference to the embodiments of the present invention, this is only an example and does not limit the present invention, and those skilled in the art to which the present invention belongs will be able to It will be appreciated that various modifications and applications not exemplified above are possible.

Therefore, it should be understood that the scope of the present invention includes modifications, equivalents, or substitutes of the technical ideas exemplified above. For example, each component specifically shown in the embodiment of the present invention can be modified and implemented. And differences related to these modifications and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims

Including a plurality of solar cell groups arranged along at least a first direction on the base,

One solar cell group includes a plurality of solar cells arranged along the first direction and a second direction crossing the first direction,

A solar module wherein a folding line extending along the second direction is formed between adjacent solar cell groups.
According to claim 1,

In any solar cell group,

At least some of the plurality of solar cells arranged in the second direction are connected in series by a conductive wire extending in the second direction.
According to claim 2,

At an edge position of the solar cell group in the second direction, a plurality of solar cells arranged in the first direction are connected in parallel and connected to a connector.
According to claim 3,

The plurality of solar cell groups include a first solar cell group and a second solar cell group,

A plurality of solar cells of the first solar cell group are connected to a first connector,

A plurality of solar cells of the second solar cell group are connected to a second connector,

The solar module wherein the first connector and the second connector are connected in series or in parallel.
According to claim 1,

Further comprising a glass disposed on the solar cell,

A solar module in which one glass covers a plurality of solar cells belonging to one solar cell group.
According to claim 1,

The area where the solar cell group is disposed defines a rigid area,

An area where the folding line is located between adjacent solar cell groups defines a folding area,

The rigid region and the folding region are alternately positioned along a first direction.
According to claim 6,

Further comprising a bonding layer interposed between the base and the solar cell,

The solar module of claim 1 , wherein the bonding layer is positioned on the base in the folding region.
According to claim 1,

A solar module further comprising a water repellent layer disposed on a rear surface of the base.
According to claim 1,

A solar module wherein a plurality of solar cells in a certain solar cell group includes solar cells having a shingled structure disposed along a second direction.