KR102596375B1 - Solar power generator - Google Patents

Abstract

A solar power generation device according to an embodiment of the present invention is a solar cell module including a plurality of solar cells connected in one direction and having a double-sided light-receiving structure, and having at least one body having a shape extending long in one direction. ; and a case to which the solar cell module is fixed. The case includes a light-transmitting portion located on a light-receiving side of the solar cell module and including a light-transmitting material, and a reflecting portion located on a non-light-receiving side of the solar cell module and including a reflective material.

Description

Solar power generation device {SOLAR POWER GENERATOR}

The present invention relates to a solar power generation device, and more specifically, to a solar power generation device that has a double-sided power generation structure and can be installed in various locations and spaces.

A solar power generation device may include a solar cell module packaged by connecting a plurality of solar cells in series or parallel. In general, a solar cell module has a flat structure in which a plurality of solar cells are positioned in one direction and a direction crossing the main body with a large area to produce a desired output. Solar cell modules with a flat structure or solar power generation devices including them were difficult to install in small areas and did not have excellent aesthetic properties.

Accordingly, solar power generation devices having various structures other than the flat structure are being proposed. For example, a solar power generation device has been proposed that places solar cells on each slat of a blind, sunshade, etc. and electrically connects them. Solar power generation devices with this structure can be installed in small areas, allowing efficient use of space. However, in such solar power generation devices, a plurality of solar cells are placed on each slat and connected. Due to this structure, contact resistance due to the connection of solar cells may increase, which may result in loss of output. Accordingly, a solar power generation device having a structure other than a flat structure and having excellent output while being installed in a narrow area is required.

The present invention seeks to provide a solar power generation device including a solar cell module that has a main body extending in one direction rather than a flat structure, so that it can be installed in various locations, for example, narrow locations, and has excellent aesthetic characteristics.

In particular, it is intended to provide a solar power generation device that can improve output by effectively using light received from both sides to compensate for output loss that may occur in a non-flat structure.

A solar power generation device according to an embodiment of the present invention is a solar cell module including a plurality of solar cells connected in one direction and having a double-sided light-receiving structure, and having at least one body having a shape extending long in one direction. ; and a case to which the solar cell module is fixed. The case includes a light-transmitting portion located on a light-receiving side of the solar cell module and including a light-transmitting material, and a reflecting portion located on a non-light-receiving side of the solar cell module and including a reflective material.

According to this embodiment, a solar power generation device including a solar cell module that has a main body that extends in one direction rather than a flat structure, can be installed in various locations, for example, narrow locations, and has excellent aesthetic characteristics, is a double-sided power generation device. The output can be improved by having a type structure. At this time, in the case that accommodates the solar cell module, a light-transmitting part containing a transparent material is located on the light-receiving side where light is mainly incident, and a reflecting part containing a reflective material is located on the non-light-receiving side where light is not incident or a small amount of light is incident. By being positioned, it is possible to effectively generate two-sided power generation in a solar power generation device installed in a narrow location (for example, inside a building such as a veranda or balcony, or outside a building such as a rooftop).

In particular, in this embodiment, the bypass diode is built into the main body to simplify the structure of the solar cell module or solar power generation device and minimize its volume. At this time, the solar cell module can be provided with a plurality of main bodies to have sufficient output as desired, and the solar cell module can be formed in various structures to be used in various locations and for various purposes.

1 is a perspective view schematically showing a solar power generation device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1.
FIG. 3 is a perspective view schematically showing a body and a frame provided in a solar cell module included in the solar power generation device shown in FIG. 1.
Figure 4 is a cross-sectional view taken along lines XX and YY of Figure 3.
Figure 5 is a plan view showing the main body shown in Figure 3.
FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5.
FIG. 7 is a partial cross-sectional view of the solar cell taken along line VII-VII of FIG. 5.
Figure 8 is a partial plan view showing an enlarged portion of part A of Figure 5.
Figure 9 is a partial plan view showing an enlarged portion of part B of Figure 5.
FIG. 10 is a schematic perspective view showing the bypass diode shown in FIG. 9.
FIG. 11 is a schematic configuration diagram illustrating a plurality of bodies included in the solar cell module shown in FIG. 1 unfolded together with a micro inverter.
Figure 12 is a plan view showing one body that can be included in a solar cell module according to a modified example of the present invention.
Figure 13 is a perspective view showing various examples of the rear portion of a solar cell module and case included in a solar power generation device according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. However, it goes without saying that the present invention is not limited to these embodiments and can be modified into various forms.

In the drawings, parts not related to the description are omitted in order to clearly and briefly explain the present invention, and identical or extremely similar parts are denoted by the same drawing reference numerals throughout the specification. In addition, in the drawings, the thickness, area, etc. are enlarged or reduced in order to make the explanation more clear, so the thickness, area, etc. of the present invention are not limited to what is shown in the drawings.

And when a part is said to “include” another part throughout the specification, it does not exclude other parts and may further include other parts, unless specifically stated to the contrary. Additionally, when a part of a layer, membrane, region, plate, etc. is said to be “on” another part, this includes not only cases where it is “directly above” the other part, but also cases where other parts are located in between. When a part of a layer, membrane, region, plate, etc. is said to be "directly on top" of another part, it means that the other part is not located in the middle.

Hereinafter, a solar cell module according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

1 is a perspective view schematically showing a solar power generation device according to an embodiment of the present invention.

Referring to FIG. 1, the solar power generation device 300 according to this embodiment includes a solar cell module 100 having at least one body 10 having a shape extending long in one direction (a first direction), and , includes a case 310 to which the solar cell module 100 is fixed. At this time, each main body 10 is connected in one direction and includes a plurality of solar cells (reference numeral 150 in FIG. 5, hereinafter the same) having a double-sided light receiving structure.

At this time, the solar cell module 100 may have one or more bodies 10 in one direction described above or in a direction crossing the floor, and may have various sizes and outputs. For example, as shown in FIG. 1, the solar cell module 100 may have a louver-type structure having a bottom surface and a plurality of bodies 10 that are inclined. However, the present invention is not limited to this. Accordingly, the plurality of main bodies 10 are positioned in a direction perpendicular to the floor surface, so that the solar cell module 100 may have a rail-type structure. Alternatively, the main body 10 may have a sunshade-type structure installed parallel or inclined to the floor surface on the outside of a building, etc. The solar power generation device 300 equipped with such a solar cell module 100 may be installed in an indoor space such as a veranda or balcony, or an external space such as a rooftop. Although the above description focuses on the case where the solar cell module 100 is installed in a building, the solar cell module 100 according to this embodiment may also be applied to various objects and locations, such as vehicles.

When the main body 10 or the solar cell module 100 of the above-described structure is provided, when a plurality of solar cells (reference numeral 150 in FIG. 5, hereinafter the same) are connected to the main body 10 for a long time in one direction, the contact resistance is reduced. can be increased. In particular, as shown in FIG. 5, when the solar cell 150 is cut from the mother solar cell and has a structure having a long axis and a short axis, the contact resistance increases when the structure itself and the solar cell 150 of this structure are connected. It can be. As a result, the output of the main body 10 or the solar cell module 100 may decrease. In consideration of this, the solar power generation device 300 according to the present embodiment has a double-sided power generation structure, so that all light incident from both sides can be used, thereby compensating for the above-mentioned decrease in output and improving output. Accordingly, the main body 10 according to this embodiment is provided with a solar cell 150 of a double-sided light-receiving structure, and has first and second cover members (reference numerals 110 and 120 in FIG. 6) having light transmissivity through which light can pass through. , hereinafter the same) and/or a sealant (reference numeral 130 in FIG. 6, hereinafter the same). The specific structure of the main body 10 and the solar cell module 100 including the same will be described in detail later with reference to FIGS. 5 to 12. The case 310 of the solar power generation device 300 will be described in more detail with reference to FIGS. 2 to 4 along with FIG. 1 .

FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. FIG. 3 is a perspective view schematically showing one body 10 and a frame 320 provided in the solar cell module 100 included in the solar power generation device 300 shown in FIG. 1, and FIG. 4 is a These are cross-sectional views taken along the X-X and Y-Y lines in Figure 3. Figure 4(a) shows a cross-sectional view taken along line X-X of Figure 3, and Figure 4(b) shows a cross-sectional view taken along line Y-Y of Figure 3.

Referring to FIGS. 1 to 4 , the case 310 according to the present embodiment includes a light transmitting portion (TP) located on the light receiving side of the solar cell module 100 and including a light transmitting material, and the solar cell module 100. It is located on the non-light-receiving side of and includes a reflective part (RP) containing a reflective material. Here, the light-receiving side and the non-light-receiving side are not absolute standards, but are relative. The part where light mainly enters can be called the light-receiving side, and the part where light is not incident or where a small amount of light is incident can be called the non-light-receiving side. You can. For example, in the case 310, portions located on the front, side, and top of the solar cell module 100 may correspond to the light-receiving side, and portions located on the bottom and rear of the solar cell module 100 may correspond to the non-light-receiving side. It may be on either side.

At this time, the light transmitting part (TP) includes a front part 311 located at the front of the solar cell module 100, and the reflecting part (RP) includes a rear part 313 located at the rear of the solar cell module 100. may include. And the light transmitting part (TP) further includes at least one of the upper part 317 located at the top of the solar cell module 100 and the side part 315 connecting both sides of the front part 311 and the rear part 313. Alternatively, the reflector RP may further include a lower portion 319 located at the lower portion of the solar cell module 100 and constituting the bottom surface.

In this embodiment, for example, the light transmitting part (TP) includes a front part 311, an upper part 317, and two side parts 315 located on both sides, and the reflecting part RP includes a rear part 313. and a lower portion 319. The front portion 311, the upper portion 317, and the side portion 315, where light is likely to enter, may be formed as light transmitting portions (TP) to allow maximum light to enter. At the same time, the rear portion 313 and the lower portion 319, which have a relatively low possibility of light entering, are formed as reflectors (RP) to reflect the light that reaches them and allow it to enter the inside of the solar cell module 100 again. can do. As a result, the amount of light incident on the solar cell module 100 can be maximized and the output can be improved by compensating for a decrease in output due to the structure of the main body 10 or the solar cell module 100, which will be described later.

Here, the light-transmitting portion TP includes a light-transmitting material and has light transparency that allows at least a portion of light to pass through. Light transmissivity includes not only translucency, which transmits light at a high rate, but also semi-transmissivity, which transmits a portion of light or a small amount of light. Considering the efficiency of the solar cell 150, etc., the light transmitting part TP is made of a material having a high transmittance (e.g., a light transmittance of 50% or more at a wavelength of 300 to 1200 nm, for example, 80%), for example. , may have a transparent material.

For example, the light transmitting part TP may include a plate containing light-transmitting resin or plastic, a glass substrate (for example, a tempered glass substrate), etc. At this time, the light transmitting portion TP may be entirely made of the same light transmitting material, or, if the light transmitting portion TP includes a plurality of parts, at least one part may have a different light transmitting material from the other parts. For example, the material of at least one of the front portion 311, the side portion 315, and the top portion 313 may be different from each other. In particular, the front part 311, which receives a relatively large amount of light and has a relatively large area, is made of a glass substrate (for example, a tempered glass substrate), and the top part 317 and the side parts 315 are made of resin or plastic. It may be composed of a plate containing a. Then, durability can be improved and yellowing can be prevented in the front part 311, which has a large area and where a relatively large amount of light is incident, and the cost and weight can be reduced by the upper part 317 and the side part 315. It can be reduced.

The reflector (RP) may include various reflective materials that can cause reflection. For example, the reflection part RP (or the rear part 313 or the bottom part 319 constituting the same) may include a metal plate. Then, the plate-shaped rear portion 313 or the bottom portion 319 can be formed through a simple manufacturing process, and the plate-shaped rear portion 313 or bottom portion 319 can be stably maintained in an inclined state with the bottom surface due to relatively high strength and hardness. As an example, the reflector RP may include a metal plate containing aluminum. According to this, the reflector (RP) can be manufactured at a low manufacturing cost and have high reflectivity. According to this, the reflector RP has an even reflective surface and can reflect light uniformly over the entire area of the reflector RP. Although not shown in the drawing, reflection characteristics can be further improved by forming uneven portions on at least one surface of the metal reflector constituting the reflector RP.

At this time, in this embodiment, the rear portion 313 of the reflector RP has a plate shape and forms the rear of the solar power generation device 100. However, the present invention is not limited to this, and separately formed reflection parts (RP) corresponding to the plurality of main bodies 10 may be provided on the rear portion 313.

Alternatively, the reflection portion RP may include a metal film formed on a base member such as glass or plastic. Alternatively, the reflection part RP may be a sheet, film, plate, etc. containing reflective particles (eg, titanium oxide (TiO ₂ ) particles, metal particles, white pigment, etc.) inside of resin or plastic. Alternatively, the reflection portion RP may be composed of a colored layer containing a white pigment or a structure in which the colored layer described above is formed on the base member described above. Various materials having other reflective properties may be used as the reflective portion (RP).

At this time, the reflector RP may be entirely made of the same reflective material, or, if the reflector RP includes a plurality of parts, at least one part may have a different reflective material from the other parts. That is, considering the characteristics required for the rear portion 313 and the lower portion 319, the materials of the rear portion 313 and the lower portion 319 may be made different from each other.

The reflection portion RP may have a reflectivity of 70% or more (e.g., 85 to 100%) for light in the visible light region (e.g., light with a wavelength of 300 to 800 nm). The reflection effect can be sufficiently achieved only when the reflector (RP) has a reflectivity of 70% or more. For example, the reflector RP may have a reflectivity of 85% to 95% for light in the visible light region (for example, light with a wavelength of 300 to 800 nm). This is in consideration of the actual reflectivity of the reflection part (RP), and in order to have a reflectivity exceeding 95%, the material cost or processing cost of the reflection part (RP) may increase.

The front portion 311, the rear portion 313, the upper portion 317, the lower portion 319, and the side portion 315 of the case 310 may be fixed and integrated by various methods. For example, it can be fixed and integrated by various methods such as adhesive, fastening member, or fitting.

In this embodiment, the main body 10 or the solar cell module 100 may be fixed to the case 310 by various methods. Below, an example of providing a frame 320 surrounding the edge of each main body 10 and fixing the frame 320 to the case 310 is illustrated. Using the frame 320, the main body 10 composed of a plurality of layers can be stably fixed. The frame 320 is formed along the edge of the main body 10 to protect the outer portion of the main body 10. At this time, the frame 320 may have a structure (for example, a hole) that allows the first and second conductive connectors (reference numerals 172 and 174 in FIG. 5 ) to be drawn out. However, the present invention is not limited to this. In other words, it is possible to provide a frame that fixes the plurality of main bodies 10 together and place it inside the case 310 or fix it to the case 310.

As an example, the frame 320 may include a panel insertion portion 322 into which at least a portion of the solar cell panel 10 is inserted, and a fixing portion 324 extending from the panel insertion portion 322. The fixing part 324 is a part for fixing to the case 310 and does not necessarily have to be provided. If the panel insertion part 322 and the fixing part 324 are provided in this way, the main body 10 can be prevented from being damaged when the main body 10 is fixed to the case 310 using the fixing part 324. there is. The panel insertion portion 322 and the fixing portion 324 may include various materials (metal, resin, etc.).

More specifically, the panel insertion portion 322 includes a front portion 322a formed along the edge at the front of the main body 10, a side portion 322b located on the side of the main body 10, and an edge at the rear of the main body 10. The rear portions 322c formed along can be connected to each other so that the outer portion of the solar cell panel 10 is located inside them. It is desirable that the front portion 322a and the rear portion 322c have a small width so as not to block or interfere with light entering the solar cell 150 located in the main body 10. For example, the panel insertion portion 322 may be bent twice and have a “L” shaped cross-sectional shape or a “U” shape such that the edge of the solar cell panel 10 is located inside. However, the present invention is not limited to this, and any one or part of the front portion 322a, the side portion 322b, and the rear portion 322c may not be located. In addition, various modifications are possible.

In the drawing, a groove- or hole-shaped guide portion 310a is formed in the case 310 (more specifically, the side portion 315), and the fixing portion 324 of the frame 320 is inserted into the guide portion 310a. It is exemplified that the frame 320 on which the main body 10 is fixed is fixed to the case 310 by sliding. At this time, the rear portion 313 may be fixed after the frame 320 to which the main body 10 is fixed is fixed to the side portion 315. However, the present invention is not limited to this. Therefore, the solar cell module 100 or the main body 10 may be fixed to the case 310 by fastening members such as screws and screws, or may be fixed to the case 310 using an insertion method such as a fitting, a sliding method using a sliding structure, an adhesive material, etc. It can be fixed to the case 310 in various ways, such as using an adhesive method. Various other variations are possible.

At this time, the main body 10 may be installed at an angle on the floor, but the present invention is not limited to this.

FIG. 5 is a plan view showing the main body 10 shown in FIG. 3, and FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5. FIG. 7 is a partial cross-sectional view of the solar cell 150 taken along line VII-VII of FIG. 5, and FIG. 8 is a partial plan view showing an enlarged portion of part A of FIG. 5.

5 to 8, in this embodiment, the main body 10 included in the solar cell module 100 includes a plurality of solar cells 150 connected along a first direction (x direction in the drawing). And, it may be electrically connected to a plurality of solar cells 150 and may include a bypass diode 180 provided in the main body 10. And the solar cell module 100 includes a first cover member 110 located on the first side (e.g., front) of the plurality of solar cells 150, and a second side (e.g., front side) of the plurality of solar cells 150. For example, it further includes a second cover member 120 located on the rear side, and a sealing material 130 that seals the plurality of solar cells 150 between the first cover member 110 and the second cover member 120. can do.

First, the solar cell 150 may include a photoelectric conversion unit that converts the solar cell into electrical energy, and an electrode that is electrically connected to the photoelectric conversion unit to collect and transmit current. Additionally, the plurality of solar cells 150 may be connected (for example, connected in series) in the first direction by the wiring member 142 to form a solar cell string. As an example, the wiring member 142 electrically connects two neighboring solar cells 150 among the plurality of solar cells 150 .

As an example, Figures 7 and 8 illustrate that the solar cell 150 is composed of a silicon crystalline solar cell. When composed of silicon crystalline solar cells, excellent power generation can be achieved. For example, the solar cell 150 includes a semiconductor substrate 160 including a base region 10, and conductive regions 20 and 30 formed in or on the semiconductor substrate 160. , and includes electrodes 42 and 44 connected to the conductive regions 20 and 30. Here, the semiconductor substrate 160 may be composed of a crystalline semiconductor (e.g., single crystal or polycrystalline semiconductor, for example, single crystal or polycrystalline silicon) containing a single semiconductor material (e.g., group 4 element). The conductive regions 20 and 30 may include a first conductive region 20 and a second conductive region 30, and the first or second conductive region 20 and 30 may be connected to the semiconductor substrate 160. ) may be composed of a doped region constituting part of a semiconductor layer, or an amorphous, microcrystalline, or polycrystalline semiconductor layer. The electrodes 42 and 44 may include a first electrode 42 connected to the first conductive region 20 and a second electrode 44 connected to the second conductive region 30 . In addition, it may further include first and second passivation films 22 and 32 and an anti-reflection film 24.

At this time, the first electrode 42 includes a plurality of finger lines 42a positioned in parallel in one direction, is positioned in a direction intersecting (for example, orthogonal to) the finger lines 42a, and is connected to the wiring member 142. A bus bar 42b corresponding to (for example, one-to-one correspondence) may be provided. At this time, the bus bar 42b may be provided in plural numbers at predetermined intervals and may have a pad portion 422 that has a width equal to or greater than that of the wiring member 142 and is substantially connected to the wiring member 142. A line portion 421 connecting the pad portion 422 and having a width smaller than that of the line 422 and the wiring member 142 may be further provided. Similarly, the second electrode 44 may also include a finger line and a bus bar, and the bus bar may include a line portion and a pad portion. In addition, the second electrode 44 may have a different shape from the first electrode 42. In this way, when the second electrode 44 has a certain pattern, the solar cell 150 has a double-sided light-receiving structure that can improve efficiency by using light incident on the rear side.

If the first and/or second electrodes 42 and 44 have this structure, they have a relatively small width and when using a large number of wiring members 142, the area of the bus bar 42b is reduced and the connection with the wiring members 142 is reduced. Adhesion can be improved. For example, the width or diameter of the wiring member 142 is 1 μm or less (for example, 200 μm to 600 μm), and the length from the center in one direction and the direction crossing this is substantially the same (for example, circular). It may have or include a rounded part. This wiring material 142 includes a core layer 142a made of metal, and a solder layer 142b formed on the surface of the core layer 142a and containing a solder material to enable soldering with the electrodes 42 and 44. It can be included. Then, the wiring member 142 can be easily attached to the solar cell 150 by applying heat while positioning the wiring member 142 on the solar cell 150.

At this time, as an example, the solar cell 150 used in this embodiment has a shape that is substantially the same in length in one direction and the direction intersecting it (for example, it has a roughly square shape with inclined portions 150a at each corner). The mother solar cell (of an octagonal shape) can be cut in one direction to have a long axis and a short axis. Then, the resistance caused by the current in each solar cell 150 can be reduced while using existing manufacturing equipment, and the output loss of the solar cell module 100 including the solar cell 150 can be reduced. As an example, the drawing illustrates that the mother solar cell is cut through the center to form two solar cells 150, and 3 to 11 wiring members 142 are provided. However, the present invention is not limited to this, and the uncut mother solar cell may be used as is, or the mother solar cell may be cut into three or more solar cells 150 and used. And in this embodiment, a solar cell 150 cut from the mother solar cell in a direction parallel to the bus bar 42b is used. Then, the finger line 42a is formed along the short axis, the bus bar 42b is formed along the long axis, and the wiring member 142 spans the bus bar 42b formed along the long axis from the front to the back of the two solar cells 150. It may have an extended structure. Then, while having a truncated structure, the solar cells 150 can be connected to each other without overlapping parts, thereby improving the area contributing to photoelectric conversion. Additionally, the mother solar cell can be formed using existing manufacturing equipment, and the wiring material 142 can be attached to the solar cell 150 using existing tabbing equipment, thereby simplifying the manufacturing process.

In the above description, an example of the structure of the solar cell 150 that can be applied to the main body 10 and its connection structure has been described. However, the present invention is not limited to this. Accordingly, the solar cell 150 may have a different structure and shape. For example, the semiconductor substrate 160, the conductive regions 20 and 30, the electrodes 42 and 44, the first and second passivation films 22 and 32, and the anti-reflection film 24 are made of various known materials. Alternatively, the configuration may be applied, and their positions, shapes, etc. may also be modified in various ways. Additionally, the solar cell 150 may be connected to various structural members, such as ribbons and interconnectors. In addition, although it is illustrated that the plurality of solar cells 150 are provided with one solar cell string within each body 10, a plurality of strings may be provided within each body 10. Additionally, the solar cell 150 may have various forms or structures, such as a thin film solar cell, a semiconductor compound solar cell, a dye-sensitized solar cell, or an amorphous solar cell.

The sealing material 130 may include a first sealing material 131 located on the front of the solar cell 150 connected by the wiring material 142, and a second sealing material 132 located on the rear of the solar cell 150. You can. The first cover member 110 is located on the first sealant 131 and forms the front of the main body 10, and the second cover member 120 is located on the second sealant 132 to form the main body 10. Constructs the rear of the. The solar cell 150 is sealed by the sealing material 130, the first cover member 110, and the second cover member 120 and can be protected from external shock, moisture, ultraviolet rays, etc. Various known insulating materials may be used as the sealant 130, first cover member 110, and second cover member 120. As an example, ethylene vinyl acetate copolymer resin (EVA), polyvinyl butyral, silicon resin, ester resin, olefin resin, etc. may be used as the sealing material 130. In this embodiment, the sealing material 130 may include a light-transmitting material to enable double-sided power generation and may have light transparency.

And the first and second cover members 110 and 120 include a light-transmitting material and have light transparency. Considering the efficiency of the solar cell 150, etc., the first or second cover members 110 and 120 have a high transmittance (for example, a light transmittance of 50% or more at a wavelength of 300 to 1200 nm, for example, 80%). ) may have a material, for example, a transparent material. And the first and second cover members 110 and 120 may include a material that is resistant to ultraviolet rays.

For example, the first or second cover members 110 and 120 may include a sheet or film containing light-transmitting resin or plastic, or glass (eg, tempered glass). At this time, the first or second cover members 110 and 120 may further include a UV blocker, UV absorber, UV stabilizer, etc. to block or absorb UV rays.

In this embodiment, the first and second cover members 110 and 120 may each include a sheet or film. Then, the weight of the main body 10 can be reduced and it can be stably used in the solar cell module 100 used in a louver-type structure, railing-type structure, sunshade-type structure, etc. Alternatively, the first cover member 110 may include a glass substrate, and the second cover member 120 may include a sheet or film. Then, the durability of the main body 10 can be improved by the first cover member 110.

Hereinafter, the main body 10 according to this embodiment will be described in more detail with reference to FIGS. 9 and 10 along with FIGS. 5 to 8.

FIG. 9 is an enlarged partial plan view of portion B of FIG. 5, and FIG. 10 is a schematic perspective view showing the bypass diode 180 shown in FIG. 9.

5 to 10, a bypass diode 180 may be installed inside each main body 10. This will be explained in more detail later.

In each body 10, the plurality of solar cells 150 include a first end solar cell 151 positioned adjacent to the first end 10a in the first direction (x-axis direction in the drawing), and a first end solar cell 151. and a second end solar cell 152 positioned adjacent the second end 10b in the direction. Each body 10 includes a first conductive connector 172 connected to the first electrode 42 of the first end solar cell 151 at the first end 10a, and a second conductive connector 172 connected to the first electrode 42 of the first end solar cell 151 at the first end 10a. A second conductive connector 174 may be provided that is connected to the second electrode 44 of the end solar cell 152 and extends to a portion adjacent to the first end 10a. And the anode electrode 182 of the bypass diode 180 is connected to one of the first and second conductive connectors 172 and 174, and the cathode electrode 184 of the bypass diode 180 is connected to the first and second conductive connectors 172 and 174. It may be connected to another one of the conductive connectors 172 and 174. Here, terms such as first, second, etc. are used only to distinguish between each other, and the present invention is not limited thereto.

More specifically, the first conductive connecting material 172 is a first conductive connecting material to which the plurality of wiring members 142 connected to the first electrode 42 of the first end solar cell 151 on the first end 10a are electrically and physically connected. It may be provided with one connection part 172a, and may further include a first terminal part 172b extending outward from the first connection part 172a. The first connection part 172a is formed in the second direction and the first terminal part 172b is formed in the first direction, so that they can be manufactured through a simple manufacturing process. In addition, the first conductive connection material 172 is formed as a single structure that integrally includes the first connection portion 172a and the first terminal portion 172b, thereby simplifying the structure. However, the present invention is not limited to this.

And the second conductive connection member 174 is a second connection portion where the plurality of wiring members 142 connected to the second electrode 44 of the second end solar cell 152 at the second end 10b are electrically and physically connected. (174a) and an extension part (174c) extending long from the second connection part (174a) to the first end (10a), and further comprising a second terminal part (174b) extending outward from the extension part (174c). It can be provided. The extension portion 174c is positioned to be spaced apart from the plurality of solar cells 150 to prevent unwanted short circuits, etc. The second connection portion 174a is formed in the second direction, and the second connection portion 174a and the second terminal portion 174b are formed to be long along the first direction on the same line, thereby simplifying the structure. In addition, the second conductive connector 174 is formed as a single structure including the first connection portion 172a, the extension portion 174c, and the second terminal portion 174b, and can be manufactured through a simple manufacturing process. . However, the present invention is not limited to this.

At this time, the first terminal portion 172b of the first conductive connector 172 and the second terminal portion 174b of the second conductive connector 174 pass through the first end 10a of the main body 10 to the outside. Since it is extended and located toward the first end 10a, the electrical connection structure with the other main body 10 can also be simplified. The first and second terminal portions 174b for connection to the outside are not located at the second end 10b.

Accordingly, when viewed in the second direction, the second conductive connector 174 is provided only near one edge and the second conductive connector 174 is not provided near the other edge, so when viewed in the second direction, the conductive connectors 172 and 174 )'s structure may be asymmetric. That is, the extension portion 174c and the second terminal portion 174b are located adjacent to one edge in the second direction, and the twelfth terminal portion 172b is located adjacent to the other edge in the second direction, so that the structure can be simplified. At this time, the second conductive connector 174 may be located near one edge of the solar cell 150 where the inclined portion (chamfer portion) 150a is located. In addition, the inclined portion 150a of the solar cell 150 may be located at a portion that overlaps another main body 10 when installed as shown in (a) of FIG. 1 . Then, interference from other main bodies 10 can be minimized and parts that may be obscured by other main bodies 10 can be effectively utilized.

The first and second conductive connectors 172 and 174 may include various known conductive materials (eg, metal). In consideration of stable current flow, the first and second conductive connecting members 172 and 174 may have a larger width than the wiring member 142.

In this embodiment, the bypass diode 180 may be installed inside the main body 10. At this time, the entire bypass diode 180 may be provided in the main body 10 so that the bypass diode 180 is built into each main body 10. As an example, each body 10 may be provided with a cathode electrode 184 and an anode electrode 182 of the bypass diode 180. More specifically, the bypass diode 180 is located between the first sealing material 131 and the second sealing material 132 and is spaced apart from the plurality of solar cells 150, but is connected to the first and second conductive connectors 172 and 174. It may be electrically and physically connected to a plurality of solar cells 150 .

At this time, in this embodiment, the bypass diode 180 includes a p-type semiconductor layer and an n-type semiconductor layer, an anode electrode 182 connected to the p-type semiconductor layer, and a cathode electrode connected to the n-type semiconductor layer ( It may be composed of a semiconductor device containing 184). The anode electrode 182 may be connected to one of the first and second conductive connectors 172 and 174, and the cathode electrode 184 may be connected to the other one of the first and second conductive connectors 172 and 174.

As an example, the bypass diode 180 may be provided as a chip-type diode and may have a different shape or material from the solar cell 150, and the cathode electrode 184 and anode electrode 182 may also be used as a chip-type diode. ) may have a different shape or material from the first electrode 42 and the second electrode 44. Since such a chip-type diode has a thickness smaller than the horizontal and vertical widths, it can be stably positioned between the first sealant 131 and the second sealant 132 through a lamination process. Here, the ratio of the thickness T2 of the bypass diode 180 to the thickness T1 of the portion of the main body 10 where the bypass diode 180 is not located is 2 times or less, or the bypass diode 180 The thickness (T2) may be 0.1 mm to 3 mm. Then, the bypass diode 180 can be stably built into the main body 10, but the present invention is not limited to this. For example, the bypass diode 180 may have a vertical or horizontal width of 5 mm or less so as not to occupy a large area, but the present invention is not limited thereto.

The anode electrode 182 and the cathode electrode 184 of the bypass diode 180 may be connected to the first and second conductive connectors 172 and 174, respectively, by various methods. For example, the anode electrode 182 and the cathode electrode 184 of the bypass diode 180 may be connected to the first and second conductive connectors 172 and 174, respectively, by direct soldering.

In this embodiment, as an example, the bypass diode 180 is connected to the second conductive connector 174 in a portion adjacent to the first end 10a where the first connection portion 172a of the first conductive connector 172 is located. It is exemplified that the extension portion 174c is located adjacent to one edge. That is, one bypass diode 180 may be located near a corner of the main body 10 where the first and second conductive connectors 172 and 174 are adjacent to each other. Then, the structures of the first conductive connector 172 and the second conductive connector 174 can be simplified. However, the present invention is not limited to this. Accordingly, each body 10 may be provided with a plurality of bypass diodes 180.

When light is incident on the solar cell 150, a current is generated and flows through photoelectric conversion. At this time, since a voltage above a certain level is not applied to the bypass diode 180, the bypass diode is maintained in a turned-off state. On the other hand, if the solar cell 150 does not operate normally due to shading, defects, etc., a voltage higher than a certain voltage is applied to the bypass diode 180 and turns on, causing a current to flow through the bypass diode 180. It flows. Accordingly, the current to flow in the main body 10 including the solar cell 150 that is not operating normally flows in a detour along the bypass diode 180. According to this, it is possible to prevent problems caused by current concentration in other main bodies 10, such as hot spots.

In this embodiment, the bypass diode 180 is built into the main body 10 to simplify the structure of the solar cell module 100. In particular, it is difficult to use conventional bypass diodes and/or junction boxes due to miniaturization of the main body 10 with a relatively small output as in this embodiment, so a bypass diode 180 is installed within each main body 10. ) can be built in to simplify the structure and minimize the volume.

In other words, existing solar cell modules have a complex structure as they are provided with a separate junction box equipped with a bypass diode, and even if a problem occurs in one solar cell string due to the connection structure of the bypass diodes and limitations in quantity, multiple solar cell strings can be connected. Because not all solar cell strings could be used, power generation could be significantly reduced. In this embodiment, since each main body 10 is provided with a bypass diode 180, only the power generation amount of the main body 10 that does not generate power decreases, thereby minimizing the decrease in power generation.

Hereinafter, the solar cell module 100 having a plurality of the above-described main bodies 10 will be described in detail with reference to FIG. 11.

FIG. 11 is a schematic configuration diagram showing the plurality of main bodies 10 included in the solar cell module 100 shown in FIG. 1 unfolded and shown together with the micro inverter 200. In FIG. 11 , an example of the polarity (i.e., (+) and (-)) of the conductive connectors 172 and 174 and the micro inverter 30 is shown to aid understanding, but the present invention is not limited thereto.

Referring to FIG. 11, in this embodiment, the solar cell module 100 includes a plurality of bodies 10, and solar cells 150 included in the plurality of bodies 10 may be connected to each other.

The above description can be applied as is to each of the plurality of main bodies 10. Here, each main body 10 may have a relatively small output (eg, 10W or more, for example, 10W to 40W). If the output of the main body 10 is less than 10W, the power generation amount is small, so even if a plurality of main bodies 10 are provided, the desired sufficient power generation amount may not be provided. If the output of the main body 10 exceeds 40W, the size or length of the main body 10 may increase, which may reduce structural stability or make it difficult to install in a narrow space.

This body 10 can have a desired output by providing a plurality of solar cells 150 in consideration of the output of the solar cells 150. As an example, the above-mentioned solar cells 150 may be provided in four or more (for example, four to six or less), and the plurality of solar cells 150 may be connected in series to provide a desired output. You can. The main body 10 including a plurality of solar cells 150 connected in series may have a power generation amount proportional to the number of solar cells 150.

In addition, the solar cell module 100 can be provided with a plurality of main bodies 10 to have sufficient output as desired. That is, when a plurality of main bodies 10 with relatively small output are connected in series to have a desired output, the amount of power generation increases proportionally according to the number of main bodies 10. Therefore, the number of main bodies 10 can be adjusted to achieve the desired amount of power generation. According to this, the solar cell module 100 can be formed in various structures so that it can be used in various locations and for various purposes. In addition, since photoelectric conversion is performed using each body 10 as a basic unit, in case of shadows, defects, etc., current is prevented from flowing only to the solar cell 150 of the body 10 through the bypass diode 180. . Therefore, only the power generation amount corresponding to the solar cell 150 located in the main body 10 is reduced. Accordingly, problems such as reduced power generation and hot spots that may be caused by shadows, defects, etc. can be effectively reduced.

Here, the plurality of bodies 10 may be electrically connected by various methods. At this time, in the plurality of main bodies 10, the first conductive connector 172 of one main body 10 may be connected to the second conductive connector 174 of the main body 10 adjacent thereto. As a result, the first and second conductive connecting members 172 and 174 of different polarities of adjacent main bodies 10 are sequentially connected on one side, so that a plurality of main bodies 10 can be connected in series. Then, the connection structure can be simplified and the space required for connection can be minimized.

For example, the first conductive connector 172 and the second conductive connector 174 of the main body 10 that are adjacent to each other may be connected to each other by the third conductive connector 176. The third conductive connector 176 may have the same or different material or structure as the first and/or second conductive connectors 172 and 174, and may be connected to the first and second conductive connectors 172 and 174 by various methods. 174). For example, both ends of the third conductive connector 176 may be connected to the first and second conductive connectors 172 and 174 by direct soldering. However, the present invention is not limited to this, and the third conductive connector 176 is formed by extending from the first or second conductive connectors 172 and 174 to form a part of the first or second conductive connectors 172 and 174. It could be. Alternatively, the third conductive connector 176 may be an electric cable.

The first conductive connector 172 and the second conductive connector 174 located on both sides of the solar cell module 100 may be connected to one terminal and the other terminal of the micro inverter 200, respectively. As an example, the first conductive connector 172 and the second conductive connector 174 may be connected to the micro inverter 200 by the fourth conductive connector 178. The fourth conductive connector 178 may have a material or structure that is the same as or different from at least one of the first to third conductive connectors 172, 174, and 176, and can be connected to the first and second conductive connectors by various methods. It can be connected to (172, 174). As an example, the fourth conductive connector 178 may be connected to the first and second conductive connectors 172 and 174, respectively, by direct soldering. However, the present invention is not limited to this, and the fourth conductive connector 178 is formed by extending from the first or second conductive connectors 172 and 174 to form a part of the first or second conductive connectors 172 and 174. It could be. Alternatively, the fourth conductive connector 178 may be an electric cable.

As the micro inverter 200, a micro inverter with a capacity to process power generation according to the number of main bodies 10 can be used. As an example, the micro inverter 200 may have a capacity of 200W to 300W. However, the present invention is not limited to this. Accordingly, the power generation amount of the solar cell module 100 can be increased depending on the number of main bodies 10, and thus has infinite scalability, so it is possible to have a micro inverter with a corresponding large capacity. The micro inverter 200 can be used in the solar cell module 100 and may have various known structures. There may be one micro inverter 200, or in some cases, multiple micro inverters 200 may be provided. And the micro inverter 200 can be installed in various locations, verandas, walls, terminal boxes, fixed parts of the solar cell module 100, etc.

In the above-described embodiments, it is illustrated that the extended portion 174c of the second conductive connector 174 is located toward the front. However, the present invention is not limited to this, and the portion corresponding to the extension portion 174c can be folded along the fold line BL shown in FIG. 12 so that the portion where the extension portion 174c is located is located at the rear. The folding process according to the fold line BL may be performed after the process of laminating the sealing material 130 and the first and second cover members 110 and 120, and may be connected to the solar cell 150 before the lamination process. It can be performed in When performing a folding process performed before the lamination process, in order to prevent unnecessary short-circuiting with other parts of the solar cell 150, the first conductive connector 172, and the second conductive connector 174, the solar cell 150 ) An insulating layer can be placed between the back of the back and the extension portion (174b). Various other variations are possible.

As such, according to the present embodiment, the solar cell module 100 includes a solar cell module 100 that has a structure that extends long in one direction rather than a flat structure, so that it can be installed in various locations, for example, narrow locations, and has excellent aesthetic characteristics. The photovoltaic device 300 can improve output by having a double-sided power generation structure. At this time, in the case 310 accommodating the solar cell module 100, a light transmitting part (TP) containing a transparent material is located on the light-receiving side where light is mainly incident, and no light is incident or a small amount of light is incident. A reflector (RP) containing a reflective material is located on the light receiving side, and is installed on both sides of the solar power generation device 300 in a narrow location (e.g., inside a building such as a veranda or balcony, or outside a building such as a rooftop). Development can occur effectively.

In particular, in this embodiment, the bypass diode 180 is built into the main body 10 to simplify the structure of the solar cell module 100 or the solar power generation device 300 and minimize its volume. At this time, the solar cell module 100 can be provided with a plurality of main bodies 10 to have sufficient output as desired, and the solar cell module 100 can be formed in various structures to be used in various locations and for various purposes. can do.

Hereinafter, a solar cell panel according to another embodiment of the present invention will be described in detail. Detailed description of parts that are the same or extremely similar to the above description will be omitted, and only different parts will be described in detail. Also, combining the above-described embodiments or modified examples thereof with the following embodiments or modified examples thereof also falls within the scope of the present invention.

FIG. 13 is a perspective view showing various examples of the rear portion 313 of the solar cell module 100 and the case 310 included in the solar power generation device 300 according to another embodiment of the present invention. For simplicity of illustration and clear understanding, the front portion 311, the side portion 315, the upper portion 317, and the lower portion 319 of the case 310 are not shown in FIG. 13 . The above description and drawings may be referred to as is for the front portion 311, side portion 315, upper portion 317, and lower portion 319 of the case 310.

Referring to FIG. 13 , in this embodiment, the rear of the main body 10 is entirely fixed to the rear portion 313 and the main body 10 is installed parallel to the rear portion 313 of the case 310. As an example, the rear of the main body 10 may be fixed to the rear portion 313 using an adhesive material, an adhesive layer, or the like. A variety of known materials can be used as adhesive materials, adhesive layers, etc. However, the adhesive material, adhesive layer, etc. may have light transparency so as not to interfere with double-sided power generation. However, the present invention is not limited to this, and the main body 10 may be fixed to the rear portion 313 or the case 310 by various other methods.

At this time, as shown in (a) of FIG. 13, one main body 10 may be fixed to the rear portion 313 to form the solar power generation device 300, and as shown in (b) of FIG. 13. As shown, a plurality of main bodies 10 may be fixed to the rear portion 313 to form the solar power generation device 300. Accordingly, the solar power generation device 100 having the desired output can be formed by adjusting the number of main bodies 10 according to the desired output.

The features, structures, effects, etc. described above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

300: Solar power generation device
310: case
320: frame
100: solar cell module
10: body
150: solar cell
172: First conductive connecting material
174: Second conductive connecting material
180: bypass diode

Claims (11)

A solar cell module including at least one body having a shape extending in one direction and including a plurality of solar cells connected in one direction and having a double-sided light-receiving structure; and
Case where the solar cell module is fixed
Including,
The case includes a light-transmitting portion located on a light-receiving side of the solar cell module and including a light-transmitting material, and a reflecting portion located on a non-light-receiving side of the solar cell module and including a reflective material,
The light transmitting part,
an upper portion located on top of the solar cell module; a front portion located in front of the solar cell module; And a side part connected to the upper part and the front part and constituting the side of the solar cell module;
The reflector,
a lower part located at the lower part of the solar cell module, constituting the bottom surface of the solar cell module, and facing the upper part; And a rear portion located at the rear of the solar cell module and facing the front portion,
The area of the front portion is provided to be larger than the areas of the side portion and the upper portion,
The front portion is provided as a glass substrate,
A solar power generation device wherein at least one of the side portion or the upper portion is made of a material containing resin or plastic. According to paragraph 1,
The main body is,
the plurality of solar cells;
a first cover member located on the first side of the plurality of solar cells;
a second cover member located on the second side of the plurality of solar cells;
a sealing material sealing the plurality of solar cells between the first cover member and the second cover member; and
A bypass diode electrically connected to the plurality of solar cells and provided in the main body.
A solar power generation device including a. According to paragraph 2,
A solar power generation device wherein the first cover member and the second cover member include a light-transmitting material. According to paragraph 1,
The light transmitting portion includes a front portion located in the front of the solar cell module,
A solar power generation device wherein the reflector includes a rear portion located at the rear of the solar cell module. delete delete According to paragraph 1,
A solar power generation device further comprising a frame fixed to the case and into which the main body is inserted. According to paragraph 1,
The solar cell module or the main body is fixed to the case by a fastening member, or is fixed to the case by an insertion method, a sliding method, or an adhesive method. According to paragraph 1,
The solar cell module is a solar power generation device comprising a plurality of main bodies in a direction intersecting a floor surface. According to clause 9,
The plurality of bodies are connected in series to each other by first and second conductive connecting members located at first ends of the plurality of bodies,
A solar power generation device in which each main body is provided with at least one bypass diode. According to paragraph 2,
The bypass diode is built into the main body,
The sealant includes a first sealant positioned between the first surface of the solar cell and the first cover member, and a second sealant positioned between the second surface of the solar cell and the second cover member. do,
A solar power generation device wherein the bypass diode is located between the first sealant and the second sealant and is spaced apart from the plurality of solar cells.

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