WO2017033261A1

WO2017033261A1 - Solar panel and surface structure thereof

Info

Publication number: WO2017033261A1
Application number: PCT/JP2015/073715
Authority: WO
Inventors: 龍治山本
Original assignee: 株式会社高揚
Priority date: 2015-08-24
Filing date: 2015-08-24
Publication date: 2017-03-02
Also published as: JP5900867B1; JP2017045741A

Abstract

Provided is a solar panel with a surface structure which enables efficient irradiation of cells with sunlight. The solar panel surface structure comprises cells for converting light into electric power, glass covering the surface of the cells so as to allow the light to be transmitted and reach the cells, and a frame which holds the cells and which is provided with terminals for outputting the electric power. The solar panel surface structure is characterized in that a plurality of large protrusion portions is arranged vertically and horizontally on the surface of the glass, and in that each of a plurality of small protrusion portions is disposed between one large protrusion portion and: a large protrusion portion which is vertically adjacent to said one large protrusion portion; a large protrusion portion which is horizontally adjacent to said one large protrusion portion; and a large protrusion portion which is diagonally adjacent to said one large protrusion portion.

Description

Solar panel and its surface structure

The present invention relates to a solar panel that generates electricity by converting sunlight into electric power and a surface structure thereof.

A solar panel is a panel formed by collecting a plurality of solar cells (solar cells). A solar cell is a power device that converts light energy into electric power using the photovoltaic effect. Solar cells include silicon and compound types. Solar cells generate electricity during the day when the sun is out, and cannot generate electricity during the night or in bad weather. Therefore, it is necessary to take in sunlight efficiently when the sun is out as much as possible. As shown in Patent Document 1, an invention is also disclosed in which incident light is deflected by an uneven sheet to increase the amount of absorption in a power generation layer.

Japanese Patent No. 5640952

However, the invention described in Patent Document 1 attempts to efficiently capture sunlight by refracting or reflecting sunlight with the unevenness of the surface, but the repetition of the uneven shape is monotonous and the sun is low Depending on the angle, the light may not be captured even if it is refracted.

Therefore, an object of the present invention is to provide a solar panel having a surface structure capable of efficiently irradiating a cell with sunlight.

In order to solve the above problems, the surface structure of the solar panel according to the first invention includes a cell that converts light into electric power and covers the surface of the cell so that the light is transmitted and reaches the cell. Glass, and a frame having a terminal for holding the cell and outputting the electric power, and a plurality of large convex portions are arranged vertically and horizontally on the surface of the glass. A small convex portion is disposed between the large convex portion adjacent vertically, the large convex portion adjacent laterally, and the large convex portion adjacent diagonally.

Further, in the first invention, the large convex portion is any one of a pyramid, a semi-ellipsoid, or a cone, and the small convex portion is any one of a pyramid, a semi-ellipsoid, or a cone. It's also good.

Further, in the first invention, a plurality of large concave portions are arranged vertically and horizontally on the surface of the glass instead of the convex portions, and further, one large concave portion, a large concave portion adjacent vertically, and a horizontal adjacent portion. It is good also as a small recessed part having been arrange | positioned between the large recessed part which carries out and the diagonally adjacent large recessed part.

In the first invention, the large concave portion is any one of a pyramid, a semi-ellipsoid, or a cone, and the small concave portion is any one of a pyramid, a semi-ellipsoid, or a cone. Also good.

In the first invention, the surface of the glass may be composed of an upper layer in which a plurality of large convex portions are arranged vertically and horizontally and a lower layer in which a plurality of large concave portions are arranged vertically and horizontally.

In the first invention, the surface of the glass is adjacent to the upper layer in which a plurality of large convex portions are arranged vertically and horizontally, the one large convex portion in the upper layer, the large convex portion adjacent vertically, and the horizontal surface. It is good also as consisting of the lower layer by which the small recessed part is arrange | positioned in the position corresponded between the large convex part to perform and the large convex part which adjoins diagonally.

Furthermore, the solar panel according to the second invention is characterized by having the surface structure of the solar panel according to the first invention.

According to the present invention, it is possible to provide a solar panel having a surface structure that can efficiently irradiate a cell with sunlight. That is, in the present invention, when the sun is at a high position, it is possible to generate power by taking in sunlight from the start of the sun rising to just before the sun sets.

It is a disassembled perspective view which shows the whole structure of the solar panel which is this invention. It is an expansion perspective view which shows an example of the surface structure of the solar panel which is this invention. It is an enlarged side view explaining the refraction of light by the surface structure of the solar panel which is this invention. It is an expansion perspective view which shows an example of the surface structure of the solar panel which is this invention. It is an expansion perspective view which shows an example of the surface structure of the solar panel which is this invention. It is an expansion perspective view which shows an example of the surface structure of the solar panel which is this invention. It is an expansion perspective view which shows an example of the surface structure of the solar panel which is this invention. It is an expansion perspective view which shows an example at the time of making the surface structure of the solar panel which is this invention concave. It is an expansion perspective view which shows an example at the time of making the surface structure of the solar panel which is this invention into two layers. It is an expansion perspective view which shows an example at the time of making the surface structure of the solar panel which is this invention into two layers. It is an expansion perspective view which shows an example at the time of making the surface structure of the solar panel which is this invention into two layers. It is an enlarged side view which shows an example at the time of making the surface structure of the solar panel which is this invention into two layers.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, what has the same function attaches | subjects the same code | symbol, and the repeated description may be abbreviate | omitted.

First, the configuration of the solar panel according to the present invention will be described. FIG. 1 is an exploded perspective view showing the overall structure of a solar panel according to the present invention.

The solar panel 100 is a device that generates power with a solar cell. As shown in FIG. 1, the solar panel 100 includes a cell 300 that is a set of solar cells, a glass 200 that covers the surface of the cell 300, and a frame 400 that holds the cell 300. In addition, the surface of the cell 300 is the side from which the solar cell captures light, and the back surface is the opposite side.

The cell 300 is a solar cell that converts light into electric power, but a plurality of solar cells may be combined. As shown in FIG. 1, a solar cell exists in each sheet-like cell. Although the electromotive force of each solar cell is small, the voltage may be increased by connecting a large number of solar cells in series.

The glass 200 is placed on the surface of the cell 300 in order to protect the cell 300. Note that in order to allow light such as sunlight to reach the cell 300, the glass 200 needs to be transparent and transmit light. The presence of the glass 200 protects the cell 300 from not only falling objects due to weather such as rain, snow, or hail, but also other flying objects such as stones even when the solar panel 100 is installed outdoors. In addition, although materials other than glass 200, for example, a synthetic resin, may be used, a hard material is preferable.

It should be noted that dirt or the like may adhere to the surface of the glass 200, thereby hindering the power generation efficiency of the cell 300. For this reason, the surface of the glass 200 may be coated with a film for preventing contamination. However, when the coating is degraded due to aging and peeled off, dirt tends to adhere. Re-coating every few years takes time for maintenance, so it is preferable to make it difficult to be stained by other means such as providing unevenness to reduce the contact surface with the stain.

The frame 400 is a plate that is applied to the back surface of the cell 300 in order to hold the cell 300. The frame 400 has a junction box 500 for outputting the power generated by the cell 300.

The junction box 500 is a box for connecting, branching, or relaying electric wires and protecting the part. The junction box 500 includes

terminals

510 and 511 for supplying power. In addition, you may seal with rubber packing etc. so that moisture may not penetrate | invade into a box with connection parts, such as the

terminals

510 and 511. FIG.

Next, the surface structure of the solar panel according to the present invention will be described. FIG. 2 is an enlarged perspective view showing an example of the surface structure of the solar panel according to the present invention. FIG. 3 is an enlarged side view for explaining light refraction by the surface structure of the solar panel according to the present invention. 4 to 7 are enlarged perspective views showing examples of the surface structure of the solar panel according to the present invention.

A plurality of large convex portions are arranged vertically and horizontally on the surface of the glass 200, and further, one large convex portion, a vertically adjacent large convex portion, a horizontally adjacent large convex portion, and a diagonally adjacent large convex portion. A small convex portion is arranged between the convex portions. The large protrusion is a large protrusion with the same predetermined shape, and the small protrusion is a small protrusion with the same predetermined shape. The large convex portion and the small convex portion may have different shapes.

In the example of the surface structure 200a shown in FIG. 2, a pyramid large convex portion 210 and a pyramid small convex portion 211 are arranged. Specifically, the large convex portion (pyramid) 210 is repeated in the vertical direction and the horizontal direction, and the small convex portion (pyramid) 211 is interposed therebetween. That is, for one large convex portion (pyramid) 210, a large convex portion (pyramid) 210a adjacent in the vertical direction, a large convex portion (pyramid) 210b adjacent in the horizontal direction, and a large convex portion adjacent in the diagonal direction ( (Pyramid) 210c, a small convex portion (pyramid) 211 is provided at the center position where each corner contacts. The large convex portion (pyramid) 210c is on the side adjacent to both the large convex portion (pyramid) 210a and the large convex portion (pyramid) 210b.

The pyramid is not limited to a quadrangular pyramid, but may be a triangular pyramid or a hexagonal pyramid. Moreover, you may provide a small convex part between not only the center of four large convex parts but two large convex parts. That is, in this case, a small convex portion (pyramid) 211 is provided at a position where the large convex portion (pyramid) 210 and the large convex portion (pyramid) 210 a contact at a side, and the large convex portion (pyramid) 210 and the large convex portion are provided. A small convex portion (pyramid) 211 is also provided at a position where the portion (pyramid) 210 b contacts with the side.

In the case of repeating only the large convex portions, it is possible to easily process the surface of the glass 200 into a protruding shape by making cuts at equal intervals in the vertical direction and similarly by making cuts at equal intervals in the horizontal direction. Is possible. However, it is very difficult to process so that a small convex part exists between them. Therefore, after calculating the shape precisely, the surface structure 200a is formed using a 3D printer or other means.

When sunlight is incident on the glass 200 having the surface structure 200a, a large amount of light is taken into the cell 300 even if it is refracted or reflected in the glass 200 from a direction close to vertical. However, from the direction close to the horizontal, if the light is not greatly refracted, it may escape to the opposite side, and light cannot be taken into the cell 300 much.

Therefore, the number of times of light refraction is increased by interposing the small convex portion 211 between the large convex portion 210a and the adjacent large convex portion 210b. The refractive index of the glass 200 varies depending on the wavelength of light, but is about 1.4 to 2.1 when the vacuum is 1. As shown in FIG. 3, the direction of light is gradually bent by passing a plurality of times through a tapered shape such as a pyramid.

For example, in the case of light 600 close to the horizontal (high position) 600, it is directed downward by being refracted when entering and exiting the large convex portion 210a and when entering and exiting the large convex portion 210b. In addition, in the case of light 601 that is nearly horizontal (low position) 601, the light is directed downward by being refracted at the time of entering and exiting the large convex portion 210 a and at the time of entering and exiting the small convex portion 211. Thereby, the light 600 and 601 are easily taken into the cell 300 below the glass 200.

There are various possible surface structures of the glass 200, that is, combinations of the shapes of the large and small convex portions. A surface structure 200b shown in FIG. 4 is a combination of a large convex portion 210 of a pyramid and a small convex portion 212 of a semi-ellipsoid (elliptical hemisphere). The pyramid is a quadrangular pyramid as an example, but it may be a triangular pyramid. Moreover, the truncated pyramid may be a truncated pyramid. Further, the semi-ellipsoid includes not only a sphere or ellipsoid cut in half, but also a part of a sphere or ellipsoid cut out.

The surface structure 200c shown in FIG. 5 is a combination of a large convex portion 210 of a pyramid and a small convex portion 213 of a cone. The cone includes a truncated cone. A surface structure 200d shown in FIG. 6 is a combination of a large convex portion 220 of a semi-ellipsoid (elliptical hemisphere) and a small convex portion 221 of a pyramid. The surface structure 200e shown in FIG. 7 is a combination of a large conical convex portion 230 and a small convex portion 231 having a pyramid shape.

The solar panel which has the surface structure which can irradiate a cell efficiently with sunlight can be provided by making surface structure into the shape which combined the large convex part and the small convex part. In other words, when the sun is at a high position, it is possible to generate power by taking in sunlight until the sun just rises and before the sun sets.

Furthermore, if there is a dent between one large convex part and the adjacent large convex part, foreign substances such as dirt are likely to accumulate there, but the dent can be reduced through the small convex part, and the coating Dirt can be suppressed semi-permanently without coating with the like.

Next, another surface structure of the solar panel according to the present invention will be described. FIG. 8 is an enlarged perspective view showing an example in which the surface structure of the solar panel according to the present invention is concave.

The surface structure of the glass 200 may be not only projected upward in a tapered shape but conversely depressed downward. The surface structure 200f shown in FIG. 8 is a flat lower glass 250 that is depressed such that a plurality of pyramidal large concave portions 260 are arranged in the vertical and horizontal directions. As shown in FIG. 8, the arrangement of the large convex portions 260 described on the lower layer glass 250 is indented toward the lower layer glass 250 on the opposite side.

Further, similarly to FIG. 2 and the like, also in the case of the surface structure 200f, a plurality of large recesses are arranged vertically and horizontally, and further, one large recess, a vertically adjacent large recess, and a horizontally adjacent large recess. A small concave portion may be arranged between the large concave portion adjacent obliquely. In addition, about the shape of a large recessed part and a small recessed part, not only a pyramid but shapes, such as a semi-ellipsoid and a cone, may be sufficient.

It is possible to provide a solar panel having a surface structure capable of efficiently irradiating a cell with sunlight even if the surface structure is replaced with a convex portion and the shape is a combination of a large concave portion and a small concave portion.

Furthermore, another surface structure of the solar panel according to the present invention will be described. 9 and 10 are enlarged views showing an example when the surface structure of the solar panel according to the present invention is made into two layers.

The surface structure of the glass 200 may be protruded upward in a tapered shape and may be depressed downward. The surface structure 200g shown in FIG. 9 includes an arrangement of large convex portions (pyramids) 260, which is an upper glass, and an arrangement of semi-ellipsoid large concave portions 270 formed in the lower glass 250, as shown in FIG. It is something that has been overlaid. That is, the surface structure 200g includes an upper glass in which a plurality of large convex portions are arranged vertically and horizontally and a lower glass 250 in which a plurality of large concave portions are arranged vertically and horizontally.

A solar panel having a surface structure capable of efficiently irradiating cells with sunlight can be provided even if the surface structure is a shape in which large concave portions of the upper glass layer and large concave portions of the lower glass layer 250 are combined.

Furthermore, another surface structure of the solar panel according to the present invention will be described. 11 and 12 are enlarged views showing an example in which the surface structure of the solar panel according to the present invention is made into two layers.

The surface structure 200h shown in FIG. 11 is obtained by superimposing an array of large convex portions (semi-ellipsoids) 220, which is an upper glass layer, and an array of semi-elliptical small concave portions 271 formed on the lower glass layer 250, vertically. is there. In addition, one large convex part (semi-ellipsoid) 220 in the upper glass, a large convex part (semi-ellipsoid) 220a vertically adjacent, a large convex part (semi-ellipsoid) 220b adjacent horizontally, and diagonally A small concave portion 271 in the lower layer glass 250 is disposed at a position corresponding to between the adjacent large convex portion (semi-ellipsoid) 220c. That is, the small convex portion 211 in FIG. 2 does not protrude upward, but corresponds to a state where it is depressed downward as shown in FIG. The upper glass layer may have a small convex portion, and the lower glass layer 250 may have a large concave portion.

A solar panel having a surface structure that can efficiently irradiate cells with sunlight can be provided even if the surface structure is a shape in which large concave portions of the upper glass and small concave portions of the lower glass are combined.

By adopting these surface structures, the direction of the solar panel 100 is not limited to the south direction, and it is possible to efficiently generate light by taking in light in directions other than the north. Moreover, even in the time zone, it is possible to generate power not only after noon but also from the time when the sun angle is low in the early morning or evening.

As mentioned above, although the Example of this invention was described, it is not limited to these. For example, materials and shapes having different refractive indexes may be combined. Also, those having the same refractive index but different sizes may be combined. As a result, the light collection rate is changed, and light can be captured from a wider angle range.

100: Solar panel 200: Glass 200a to 200h:

Surface structure

210, 210a to 210c: Large convex part (pyramid)
211, 221, 231: Small convex part (pyramid)
212: Small convex part (semi-ellipsoid)
213: Small convex part (cone)
220, 220a-220c: Large convex part (semi-ellipsoid)
230: Large convex part (cone)
250: Lower glass 260: Large recess (pyramid)
270: Large recess (semi-ellipsoid)
271: Small recess (semi-ellipsoid)
300: Cell 400: Frame 500: Junction box 510, 511: Terminal 600, 601: Light

Claims

A cell that converts light into electrical power;
Glass that covers the surface of the cell so that the light is transmitted and reaches the cell;
A frame having a terminal for holding the cell and outputting the power,
A plurality of large convex portions are arranged vertically and horizontally on the surface of the glass, and further, one large convex portion, a vertically adjacent large convex portion, a horizontally adjacent large convex portion, and a diagonally adjacent large A small convex part is arranged between the convex part,
The surface structure of the solar panel.
The large convex portion is any one of a pyramid, a semi-ellipsoid, or a cone;
The small convex portion is any one of a pyramid, a semi-ellipsoid, or a cone;
The surface structure of the solar panel according to claim 1.
On the surface of the glass, a plurality of large concave portions are arranged vertically and horizontally in place of the convex portions, and further, one large concave portion, a vertically adjacent large concave portion, and a horizontally adjacent large concave portion are obliquely adjacent to each other. A small recess is placed between the large recess and the
The surface structure of the solar panel according to claim 1.
The large recess is any one of a pyramid, a semi-ellipsoid, or a cone;
The small recess is any one of a pyramid, a semi-ellipsoid, or a cone;
The surface structure of the solar panel according to claim 3.
The surface of the glass consists of an upper layer in which a plurality of large convex portions are arranged vertically and horizontally and a lower layer in which a plurality of large concave portions are arranged vertically and horizontally.
The surface structure of the solar panel according to claim 1.
The surface of the glass has an upper layer in which a plurality of large convex portions are arranged vertically and horizontally, one large convex portion in the upper layer, a large convex portion adjacent vertically, a large convex portion adjacent horizontally, and a diagonal It consists of a lower layer in which small concave portions are arranged at positions corresponding to adjacent large convex portions,
The surface structure of the solar panel according to claim 1.
It has the surface structure of the solar panel as described in any one of Claims 1 thru | or 6.
A solar panel characterized by that.