KR102729740B1 - bifacial solar cell module type frame and solar system including the same - Google Patents

Abstract

The present invention relates to a solar system in which a double-sided photovoltaic solar cell module is installed vertically on the ground, and more specifically, to a solar system including a frame for a double-sided photovoltaic solar cell module that prevents shading occurring on the solar panel due to a structure.
And the frame includes a main body; a first connecting portion formed by recessing inwardly along a first direction on one surface of the main body, into which one side of the module is fitted; a second connecting portion formed on the front and rear surfaces of the main body with respect to the first direction and coupled with the corner bracket by fitting together; a third connecting portion formed on the opposite surface of the surface on which the first connecting portion is formed and coupled with a fixing member; and a shading prevention portion formed on both surfaces of the main body in a shape in which a horizontal cross-sectional area gradually decreases toward the surface to ensure a light inflow path to the edge of the module.

Description

Frame for double-sided photovoltaic cell module and solar system including the same {bifacial solar cell module type frame and solar system including the same}

The present invention relates to a solar system in which a double-sided photovoltaic solar cell module is installed vertically on the ground, and more specifically, to a solar system including a frame for a double-sided photovoltaic solar cell module that prevents shading occurring on the solar panel due to a structure.

Solar power generation is generally used as a clean energy source, and various technologies for structures for solar power generation are being developed.

However, solar power systems using conventional structures have limited installation locations, high initial investment costs, and require large spaces to supply the necessary strategic production volume.

Farmland is widely used as a wide space for installing solar power systems, but when used in conjunction with crop cultivation, the structure reduces the amount of sunlight, making it difficult to grow crops.

To solve these problems, a solar power system was proposed that vertically arranges double-sided photovoltaic solar cell modules as shown in Fig. 1 and installs them in rural areas and farms.

A technology related to this is Patent Document 1, ‘Vertical solar power facility equipped with double-sided modules’, which aims to minimize solar energy loss and maintain land utilization by arranging solar panels perpendicular to the ground.

However, the conventional vertical solar power system and patent document 1 have a problem in that the solar power generation efficiency is reduced due to shading caused by the structure that fixes the module during times when the sun's altitude increases and during the summer when the sun's altitude is high.

As illustrated in FIG. 2, Patent Document 1 causes shade to be generated at the edge of the solar panel due to a two-way bonding member that presses and fixes the edge of the solar panel.

In the case of a photovoltaic system in which modules are connected in series, if one module is shaded due to the absence of the above two-way coupling, the reduction in power generation of the module affects all modules connected in series. In addition, if the shade occurs for a long time, the resistance value of the module increases, causing damage to the bypass diode.

KR 10-2138744 B1

The present invention aims to increase the efficiency of solar power generation by preventing shading from occurring on both sides of a solar cell module depending on the altitude of the sun through an anti-shading portion that is formed at a preset angle on both sides of a frame for a double-sided photovoltaic module.

A frame for a double-sided photovoltaic cell module according to an embodiment of the present invention includes: a horizontal frame; a vertical frame; and corner brackets connecting the horizontal and vertical frames to each other.

And in the horizontal and vertical frames, a main body; a first connecting portion formed by recessing inwardly along a first direction on one surface of the main body and into which one side of the module is fitted; a second connecting portion formed on the front and rear surfaces of the main body based on the first direction and coupled with the corner bracket by fitting together; a third connecting portion formed on the opposite surface of the surface on which the first connecting portion is formed and coupled with the fixing member; and a shading prevention portion formed on both surfaces of the main body and having a shape in which a horizontal cross-sectional area gradually decreases as it goes toward the surface to ensure a light inflow path to the edge of the module are formed.

The second connecting portion is formed on the front and rear surfaces at a preset distance from the first connecting portion in a direction perpendicular to the one surface.

The front and rear surfaces are formed to be inclined toward the first joint, so that the surfaces that are joined between the horizontal and vertical frames are in contact with each other.

According to an embodiment of the present invention, a solar cell module installed on farmland can be used without reducing the amount of sunlight reaching crops due to a structure, and can prevent shading on both sides of a double-sided photovoltaic cell module by a frame, thereby increasing the efficiency of solar power generation.

Additionally, when a solar cell module is to be removed from the inside of the frame for replacement or maintenance, the module can be easily removed by releasing one of the horizontal frame and the vertical frame from the fixing member.

Figure 1 is a drawing showing a vertical solar system including double-sided photovoltaic solar cell modules.
Figure 2 is a drawing showing a joining member for fixing a double-sided photovoltaic cell module according to the prior art.
FIG. 3 is a front view of a solar cell system including a frame for a double-sided photovoltaic module according to an embodiment of the present invention.
FIG. 4 is a perspective view of a frame for a double-sided light-receiving solar cell module according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view of a frame for a double-sided photovoltaic module according to an embodiment of the present invention, viewed from the front.
FIG. 6 is a side view of a frame for a double-sided photovoltaic module according to an embodiment of the present invention.
FIG. 7 is a drawing showing a state in which a light inflow path is secured to the edge of a solar cell module through an anti-shading portion according to an embodiment of the present invention.
Figure 8 is a drawing showing the appearance of shading occurring on the side of a solar cell module.
FIG. 9 is a cross-sectional view from the side of a solar system including a frame for a double-sided photovoltaic module according to an embodiment of the present invention.
FIG. 10 is a cross-sectional view from the side of a solar system including a frame for a double-sided photovoltaic module according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily practice the invention. In order to clearly explain the present invention in the drawings, parts that are not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification. In addition, the attached drawings are only for making it easy to understand the embodiments disclosed in the specification, and the technical ideas disclosed in the specification are not limited by the attached drawings.

Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another.

FIG. 3 illustrates a front view of a solar system including a frame for a double-sided photovoltaic module according to an embodiment of the present invention.

In this regard, the solar power system includes a fixture installed on the ground; a frame for a double-sided photovoltaic solar cell module coupled to the fixture; and a double-sided photovoltaic solar cell module (hereinafter referred to as a ‘module (300)’) coupled to the inside of the frame but coupled vertically to the ground.

The above-mentioned fixing member may include a vertical fixing member (101) installed vertically on the ground; and a horizontal fixing member (102) connected to the vertical fixing member (110) but installed parallel to the ground.

The above frame includes a vertical frame (201); a horizontal frame (202); and corner brackets connecting the vertical and horizontal frames (201, 202) to each other.

The above vertical frame (201) is installed in a direction perpendicular to the ground and can be combined with the vertical fixing member (101).

The above horizontal frame (202) is installed in a direction parallel to the ground and can be combined with the horizontal fixing member (102).

According to an embodiment of the present invention, the vertical frame (201) and the horizontal frame (202) are respectively connected to the vertical fixing member (101) and the horizontal fixing member (102).

According to another embodiment of the present invention, the vertical frame (201) is coupled to a vertical fixture (101), but in this case, a horizontal fixture (102) may not be included.

According to another embodiment of the present invention, the horizontal frame (202) is coupled to a horizontal fixture (102). In this case, a vertical fixture (101) is included.

The above corner brackets are integrally formed in a ‘└’ shape and are fastened to the front and rear surfaces of the vertical frame (201) and the horizontal frame (202), respectively, thereby combining the two vertical frames (201) and the two horizontal frames (202) to form a square shape.

FIG. 4 is a perspective view of a frame for a double-sided photovoltaic module according to an embodiment of the present invention. FIG. 5 is a cross-sectional view of a frame for a double-sided photovoltaic module according to an embodiment of the present invention as viewed from the front. FIG. 6 is a side view of a frame for a double-sided photovoltaic module according to an embodiment of the present invention.

Looking at these drawings, the horizontal and vertical frames (201, 202) include a main body (210); a first coupling part (220); a second coupling part (230); a third coupling part (240); and an anti-shading part (250).

And the first direction described below means the Y-axis direction, the second direction means the X-axis direction, and the third direction means the Z-axis direction.

The above first connecting portion (220) is formed by recessing inwardly along the first direction on one side of the main body (210), and one side of the module (300) is fitted therein.

A buffer member may be provided in the gap formed when the first connecting portion (220) and the module (300) are connected.

The above-mentioned buffer member is provided with a rubber packing or an adhesive that fills the gap, thereby preventing the module (300) from being damaged by repeated or strong movement within the gap due to external factors such as strong wind.

The above second connecting portion (230) is formed on the front and rear surfaces of the main body (210) with respect to the first direction, and is aligned with the corner bracket.

In addition, the second connecting portion (230) is formed at a preset distance from the first connecting portion in the third direction, thereby preventing interference with the module (300) when the corner bracket is formed.

According to an embodiment of the present invention, the second connecting portion (230) is formed to be sunken inward from the front and rear surfaces, so that the corner bracket is fitted therein.

In addition, the front and rear surfaces are formed to be inclined toward the first connecting portion (220) so that the surfaces to be connected when the vertical frame (201) and the horizontal frame (202) are connected come into contact with each other.

This prevents contaminants such as rainwater and snow from flowing into the first joint (220) and second joint (230).

The third connecting portion (240) is formed along the first direction on the opposite side of the side on which the first connecting portion (220) is formed, but is formed thinner than the width of the opposite side. In this case, the width means the length in the second direction of the main body.

The third connecting portion (240) can be connected through a connecting bolt (400) as shown in Fig. 3. At this time, a connecting hole (241) having a shape corresponding to the connecting bolt (400) can be formed on one side of the third connecting portion (240).

Alternatively, a protrusion that protrudes to be fixedly engaged with the third coupling member (240) may be included on one side of the fixed member, and the third coupling member (240) may have a groove or engaging member formed in a shape corresponding to the protrusion.

Fig. 7 is a drawing showing a state in which a light inflow path is secured to the edge of a solar cell module through a shading prevention unit according to an embodiment of the present invention. Fig. 8 is a drawing showing a state in which shading occurs on the side of the module.

Looking at Figure 7, the shading prevention part (250) is formed on both sides of the main body (210), and is formed to be inclined toward the first coupling part (220).

According to another embodiment of the present invention, the anti-shading portion (250) may be formed on both sides of the main body (210), and may be formed in a shape in which the horizontal cross-sectional area gradually decreases toward the side where the first connecting portion (220) is formed.

To explain in detail, the anti-shading portion (250) is formed so that the slope of the line segment connecting the center point of the corner in contact with the surface where the first connecting portion (220) is formed and the center point of the corner located on the opposite side is a preset angle based on the surface.

The above angle is formed between 20° and 50°.

If the above angle exceeds 50°, structural stability can be secured, but a light inflow path is not secured to the edge of the module (300), so shading occurs.

If the above angle is less than 20°, a light inflow path can be secured to the edge of the module (300) to prevent shading, but structural safety is not secured.

That is, the angle at which the shading prevention part (250) according to the embodiment of the present invention is formed not only ensures structural stability, but also ensures a path for light to enter the edge of the module (300), thereby preventing shading from occurring on the side of the module (300).

FIG. 9 is a cross-sectional view from the side of a solar system including a frame for a double-sided photovoltaic module according to an embodiment of the present invention. FIG. 10 is a cross-sectional view from the side of a solar system including a frame for a double-sided photovoltaic module according to another embodiment of the present invention.

Looking at these drawings, the solar system according to the embodiment of the present invention includes a vertical fixing member (101), but a horizontal fixing member (102) may be included or not depending on the fixing member connection position of the frame.

FIG. 9 shows a frame coupled to the horizontal fixing member (102), and as seen in FIG. 3, the horizontal fixing member (102) is positioned on the upper and lower sides of the module (300).

In this case, in order for the module (300) to be stably installed in a direction perpendicular to the ground, a horizontal frame (202) is preferentially connected to a horizontal fixing member (102) located at the bottom of the module (300) to be installed.

And the vertical frame (201) is combined on the left and right sides of the horizontal frame (202), and the module (300) is inserted into the frame.

Finally, a horizontal frame (202) is attached to a horizontal fixing member (102) located on the upper side of the module (300).

Figure 10 shows a frame attached to the vertical fixing member (101).

In this case, a vertical frame (201) is preferentially coupled to a vertical fixing member (101) located on the left or right side of the module (300). Then, a horizontal frame (202) is coupled to the lower side of the vertical frame (201), and another vertical frame (201) is coupled to a vertical fixing member (101) located in a direction corresponding to the vertical frame (201).

And the above module (300) is inserted into the frame.

Finally, so that the horizontal frame (202) is positioned on the upper side of the module (300), the horizontal frame (202) is coupled to the vertical frame (201) coupled to the vertical fixing member (101).

As shown in FIGS. 9 and 10, in the solar power system according to the embodiment of the present invention, when a problem occurs in a module (300) coupled inside the frame and it is replaced or maintained, the module (300) can be easily removed from inside the frame by uncoupling only one of the two vertical frames (201) and two horizontal frames (202) forming a square shape.

The scope of the present invention should be interpreted to include all changes or modifications derived based on the technical idea of the present invention in addition to the embodiments disclosed herein.

101 : Vertical Fixture
102 : Horizontal fixing bracket
201 : Vertical Frame
202 : Horizontal Frame
210 : Main body
220: First joint
230: Second joint
240: Third joint
241 : Joining hole
250 : Anti-shading section
300 : Solar cell module
400 : Combination bolt

Claims (4)

In a frame for a double-sided photovoltaic module installed vertically on the ground,
The above frame is,
A horizontal frame; a vertical frame; and corner brackets for connecting the horizontal and vertical frames to each other;
In the above horizontal and vertical frames,
Main body and,
A first connecting portion formed inwardly along the first direction on one side of the main body, into which one side of the module is fitted,
A second connecting portion formed at a predetermined distance from the first connecting portion in the third direction and formed on the front and rear sides of the main body based on the first direction and joined to the corner bracket,
A third joint formed along the first direction on the opposite side of the first joint, but thinner than the width of the opposite side, and coupled with a fixed member installed on the ground; and
A shading prevention section is formed on both sides of the main body, and is formed in a shape in which the horizontal cross-sectional area gradually decreases toward the one side, thereby ensuring a path for light to enter the edge of the module.
A frame for a double-sided light-receiving solar cell module, characterized in that the above-mentioned shading prevention portion is formed such that the slope (α) of the line segment connecting the center point of the edge in contact with one surface of the first joining portion and the center point of the edge located opposite to it is 20° to 50°.
delete delete A fixture including a vertical fixture installed vertically on the ground and a horizontal fixture connected to the vertical fixture but installed parallel to the ground;
a frame coupled to the above fixed member; and
Includes a double-sided photovoltaic cell module coupled to the inside of the above frame and installed vertically on the ground;
The above frame is,
Comprising a horizontal frame, a vertical frame, and corner brackets connecting the horizontal and vertical frames to each other,
In the above horizontal and vertical frames,
Main body and,
A first connecting portion formed inwardly along the first direction on one side of the main body, into which one side of the module is fitted,
A second connecting portion formed at a predetermined distance from the first connecting portion in the third direction and formed on the front and rear sides of the main body based on the first direction and joined to the corner bracket,
A third connecting portion formed along the first direction on the opposite side of the side on which the first connecting portion is formed, but formed thinner than the width of the opposite side, and connected to the fixed member;
An anti-shading portion is formed on both sides of the main body, and the slope (α) of the line connecting the center point of the edge in contact with one side of the first joint portion and the center point of the edge located opposite to the first joint portion is 20° to 50°.
The above corner brackets are formed integrally in a '└' shape and are respectively fitted and fastened to the vertical and horizontal frames.
The front and rear surfaces of the vertical and horizontal frames to which the above corner brackets are fitted are formed so as to be inclined toward the first joint portion, so that the surfaces to be joined between the vertical and horizontal frames are configured to be in contact with each other.
A solar power system characterized in that, when replacing or maintaining a module coupled inside the horizontal and vertical frames, the module is removed by disengaging one of the two vertical frames and the two horizontal frames.

Images