TW201934937A - Concentrator photovoltaic module and concentrator photovoltaic device - Google Patents

Abstract

In this concentrator photovoltaic module, a plurality of concentrator photovoltaic units are disposed side-by-side inside a housing, and each of the concentrator photovoltaic units is provided with: a light concentrating unit for concentrating incident solar light; a flexible printed circuit board provided on the bottom surface of the housing; a cell which is provided at a position which is on the flexible printed circuit board and coincident with the optical axis of the light concentrating unit when the light concentrating unit is directly facing the sun, and which performs photoelectric conversion on the concentrated light; and a shielding plate which is disposed on the optical axis between the light concentrating unit and the cell and which includes a light transmission part for transmitting light concentrated toward the cell, and a shielding part for blocking light concentrated at positions away from the cell; and a support unit for supporting the shielding plate at a predetermined position inside the housing, wherein the material of the shielding plate is transparent glass or resin, and at least the surface of the shielding part is a rough surface that scatters the received light.

Description

Light-gathering solar power generation module and light-gathering solar power generation device

The invention relates to a light-concentrating solar power generation module and a light-concentrating solar power generation device.
This application claims priority based on Japanese Application No. 2018-022929, filed on February 13, 2018, and is a reference to all of the contents described in the aforementioned Japanese Application.

The light-concentrating solar power generation device collects sunlight with a light-collecting lens, and sets the basic structure of an optical system that is "shot into the smallest cell for power generation" as a minimum unit. This basic structure is a module arranged in a matrix in a matrix, and the module is further arranged side by side into an array (panel), and it becomes a light-concentrating solar power generation device. In order to track the sun, the tracking bracket that carries the array is supported on the pillar by a two-axis drive capable of azimuth and elevation (for example, refer to Patent Document 1).

If the sun can be chased ideally, the sunlight can be accurately collected at the aiming position on the cell. However, there may be some deviations in practice. In order to eliminate such a slight deviation, it is also proposed to arrange the spherical lens slightly above the cell, and even if the light deviates slightly, as long as it can enter the spherical lens, the light can be directed toward the cell. Technology (for example, refer to Patent Document 2).

However, in reality, due to various reasons, a deviation (hereinafter referred to as OFF-AXIS) may occur between the incident direction of sunlight and the original optical axis of the module. The cause of the deviation is, for example, in the entire array, the cause of the tracking bracket driving deviation, the tracking deviation, etc. lies in the driving mechanism or the control situation. As a result of the deviation, when light is collected from a position deviated from a cell, thermal damage may be caused to the part. Here, a configuration is also proposed in which a metal shielding plate is designed to shield light collected at inappropriate positions (for example, refer to Patent Document 3).
[Prior technical literature]
[Patent Literature]

Patent Document 1: Japanese Patent Application Publication No. 2014-226025 Patent Document 2: US Patent Application Publication US2010 / 0236603A1
Patent Document 3: Japanese Patent Laid-Open No. 2015-159184

This disclosure includes the following inventions. However, the invention is defined by the scope of patent applications.

A light-gathering type solar power generation module according to one aspect of the present invention is a light-gathering type solar power generation module formed by arranging a plurality of light-gathering type solar power-generating units for generating electricity by collecting sunlight. It is characterized in that each of the above-mentioned light-concentrating solar power generation units includes: a light-collecting unit that collects incoming sunlight; a flexible printed wiring board provided on the bottom surface of the frame; and a cell. Is placed on the flexible printed wiring board at a position coincident with the optical axis of the light collecting part when facing the sun, and performs photoelectric conversion on the light after the light is collected; the shielding plate is located on the optical axis A light-transmitting portion is formed between the light-collecting portion and the cell, and a light-transmitting portion that passes light collected toward the cell is formed, and the light-collecting portion is shielded from collecting light at a position deviated from the cell. A light shielding portion; and a support portion that supports the shielding plate at a predetermined position in the frame, the material of the shielding plate is transparent glass or resin, and at least the surface of the shielding portion is made to receive light Scattered coarse .

[Problems to be solved by this disclosure]
The vicinity of the battery cell in the light-gathering solar power generation module will also become high-voltage electricity. Therefore, the metal shielding plate needs to be located away from the battery cell to a certain extent. If it is installed away from it, from the viewpoint of manufacturing accuracy, it is necessary to make the opening through which light passes slightly larger. For this reason, it is also necessary to provide a protective plate different from the shielding plate. (Please refer to Patent Document 3.). If a protective plate is provided in addition to the shielding plate, it is sufficient for OFF-AXIS countermeasures, but it is complicated in manufacturing and it is not easy to reduce costs. As described above, in the conventional concentrated solar photovoltaic power generation, there is a problem of how to make the countermeasure of OFF-AXIS a reliable and inexpensive structure.

In view of the related problems, an object of the present disclosure is to provide a more reliable and inexpensive OFF-AXIS countermeasure in a concentrated solar photovoltaic power generation module.

[Effect of the present disclosure]
According to the present disclosure, it is possible to apply a more reliable and inexpensive OFF-AXIS countermeasure to a concentrated solar photovoltaic power generation module.

[Key points of the embodiment]
The gist of the embodiment of the present invention includes at least the following.

(1) A light-gathering type solar power generation module, which is composed of a plurality of light-gathering type solar power generation units that collect sunlight to generate electricity, and are arranged in a frame. The photovoltaic power generation unit is provided with a light-collecting unit that collects incoming sunlight, a flexible printed wiring board provided on the bottom surface of the frame, and a cell provided on the flexible printed wiring. The position of the board is consistent with the optical axis of the light collecting part when facing the sun, and photoelectric conversion is performed on the light after the light collection;
The shielding plate is located between the light collecting portion and the battery cell on the optical axis, wherein a light transmitting portion is formed to pass the light collected toward the battery cell, and the light shielding portion has a deviation from the light shielding portion. A light shielding portion that collects light at the position of the cell; and a support portion that supports the shielding plate at a predetermined position within the frame, the material of the shielding plate is transparent glass or resin, and the shielding At least the surface is a rough surface that scatters the received light.

In such a light-concentrating solar power generation module, the light collected by the light-collecting section is guided to the cell through the light-transmitting section when the chase does not deviate. On the other hand, it is possible to scatter the sunlight that has deviated from the position of the battery cell when the tracking deviation has occurred, to scatter it by the rough surface of the shielding portion, to suppress penetration, and to prevent the battery cell Peripheral thermal damage. A transparent glass or resin is used as the material of the shielding plate, and the rough surface of the shielding portion can be formed by roughening the surface other than the light transmitting portion. Such a shielding plate can be easily and inexpensively manufactured, and can be arranged closer to a cell than a metal. Therefore, it is suitable for light shielding during OFF-AXIS.
In this way, it is possible to apply OFF-AXIS countermeasures that are more reliable in manufacturing and cheaper in concentrated solar power generation.

(2) In addition, as in the light-gathering solar power generation module of (1), in the case where the light-collecting part is a primary lens, the light-transmitting part will use the primary lens The collected light is guided to the secondary lens of the cell, and the secondary lens is integrally formed using the same material as the shielding portion.
In this case, since the secondary lens and the shielding portion of the secondary optical system are integrated, it helps to reduce the number of parts and is easy to assemble.

(3) In addition, as in the light-gathering solar power generation module of (1), the light transmitting portion may be continuous to the shielding portion without a rough surface, and the whole may be transparent.
In this case, since the light-transmitting portion and the shielding portion are integrated, the number of parts can be reduced. In addition, since the shielding plate is flat as a whole, it is easy to manufacture and inexpensive.

(4) In the light-concentrating solar power generation module according to (1), the light transmitting portion may be an opening formed in the shielding plate.
In this case, there is no attenuation of light due to the light transmitting portion. The material of the shielding plate can also be reduced. In addition, since the shielding plate is flat as a whole, it is easy to manufacture and inexpensive.

(5) In addition, if the light-gathering type solar photovoltaic power generation module according to any one of (1) to (4), the aforementioned shielding plate may be formed into a plate shape for each module.
In this case, since a single shielding plate is provided, assembly of the light-gathering solar power generation module is easy.

(6) In addition, if the light-gathering type photovoltaic power generation module according to any one of (1) to (4), the aforementioned shielding plate may be formed into a plurality of plate-like shapes for each module.
In this case, since the size of one shielding plate is divided and reduced, handling during manufacturing is easy.

(7) Furthermore, as in the light-concentrating solar power generation module according to any one of (1) to (4), the shielding plate may be formed in an independent plate shape for each of the light-collecting portions.
In this case, although the number of the shielding plates is increased, each piece can be made to a minimum size, so only a small amount of material is required.

(8) In addition, the light-collecting solar power generation module of the light-collecting solar power generation module such as (1) can be juxtaposed on a support for tracking the sun to form an array of light-collecting solar light. Power generation device.
In such a light-concentrating solar power generation device, when the sun is not shifted, the light collected by the light-collecting portion is guided to a cell through the light-transmitting portion. On the other hand, it is possible to scatter the sunlight that has deviated from the position of the cell when the tracking deviation has occurred, to scatter it by the rough surface of the shielding portion, to suppress penetration, and to prevent it from reaching the cell Damage from surrounding heat. A transparent glass or resin is used as the material of the shielding plate, and the rough surface of the shielding portion can be formed by roughening the surface other than the light transmitting portion. Such a shielding plate can be easily and inexpensively manufactured, and can be arranged closer to a cell than a metal. Therefore, it is suitable for light shielding during OFF-AXIS.

[Detailed Embodiment]
Hereinafter, a light-gathering solar power generation device and a light-gathering solar power generation module according to an embodiment of the present invention will be described with reference to the drawings.

《Solar Power Generation Device》
FIG. 1 and FIG. 2 are perspective views of one example of a light-gathering type photovoltaic power generation device in which one unit is viewed from the light-receiving surface side. FIG. 1 shows the photovoltaic power generation device 100 in a completed state, and FIG. 2 shows the photovoltaic power generation device 100 in a state during assembly. FIG. 2 shows the state of the skeleton in which the tracking bracket 25 can be seen on the right half, and the state of 1M in which the light-gathering solar power generation module (hereinafter, simply referred to as the module) is assembled is shown on the left half. Moreover, when the module 1M is actually assembled on the tracking bracket 25, the tracking bracket 25 is mounted on the ground in a flat state.

In FIG. 1, this photovoltaic power generation device 100 is continuous on the upper side, and includes an array (the entire photovoltaic power generation panel) 1 and a supporting device 2 which are separated from each other on the lower side. The array 1 is configured by neatly arranging the modules 1M on the tracking bracket 25 (FIG. 2) on the back side. In the example of FIG. 1, 8 (96 (= 12 × 8) × 2) and the central cross-section forming the left and right wings are formed as an assembly of a total of 200 modules 1M to form the array 1. .

The support device 2 includes a pillar 21, a base 22, a two-axis drive section 23, and a horizontal shaft 24 (FIG. 2) serving as a drive shaft. The lower end of the stay 21 is fixed to the base 22 and includes a two-axis drive unit 23 at the upper end.

In FIG. 1, the base 22 is firmly buried in the ground so that only the upper surface can be seen. In a state where the base 22 is buried in the ground, the pillar 21 is vertical and the horizontal axis 24 (FIG. 2) is horizontal. The two-axis driving unit 23 can rotate the horizontal axis 24 in two directions: an azimuth angle (an angle of the pillar 21 as the central axis) and an elevation angle (the angle of the horizontal axis 24 as the central axis). In FIG. 2, a reinforcing material 25 a of a reinforcing tracking bracket 25 is attached to the horizontal axis 24. A plurality of horizontal rails 25b are attached to the reinforcing material 25a. According to this, if the horizontal axis 24 is rotated in the direction of the azimuth or elevation, the array 1 is also rotated in that direction.

In addition, although FIG. 1 and FIG. 2 show a support device 2 that supports the array 1 by using one pillar 21, the configuration of the support device 2 is not limited to this. That is, as long as the support device of the array 1 can be supported so that 2 axes (azimuth angle, elevation angle) can be moved.

The array 1 shown in Figure 1 is usually vertical before dawn and sunset.
During the day, the light-receiving surface of the system array 1 often faces the sun, and the two-axis driving unit 23 operates, and the array 1 performs a sun-chasing operation.
FIG. 3 is a perspective view showing a posture of the array 1 facing the sun as an example. In addition, for example, at the time of culmination near the equator, the array 1 has a light-receiving surface that is oriented horizontally toward the sun. At night, for example, the light-receiving surface of the array 1 faces the ground and becomes horizontal.

"Configuration Example of Concentrated Solar Power Generation Module"
FIG. 4 is a perspective view showing an example of the configuration of the module 1M. In the figure, the module 1M is a physical form in appearance, and includes, for example, a rectangular flat-bottomed container body 11 made of metal or resin, and a light collecting unit 12 mounted on the top like a lid. The light collection unit 12 is configured by, for example, attaching a Fresnel lens 12f made of resin to the back surface of a transparent glass plate 12a. For example, the area shown in the figure is a square one by one (10 × 7 in this example), which is a Fresnel lens 12f, and can focus sunlight on the focal position.

On the bottom surface 11b of the housing 11, an elongated flexible printed wiring board 13 is arranged in a meandering arrangement. The shield plate 14 is attached so as to cover the entire flexible printed wiring board 13. A spherical lens is disposed on the shielding plate 14 as a light transmitting portion 14 a at a position where the corresponding Fresnel lens 12 f is aligned with the optical axis. The light transmitting portion 14 a is formed integrally with the shielding plate 14.

FIG. 5 is a plan view showing an example of a state where the flexible printed wiring board 13 is mounted on the bottom surface 11 b of the housing 11. The flexible printed wiring board 13 is a person who forms a conductive pattern on a flexible and flexible substrate, and only the vicinity of the portion where the cell 16 is placed is slightly wider than the other portions. The cells 16 are arranged at regular intervals in the vertical direction and the horizontal direction in FIG. 5. In the figure, 70 cells are connected in series with each other; the power generation output is derived from the ends 13a, 13b of the flexible printed wiring board 13 to the outside.

"The first example of the shielding plate"
FIG. 6 is a separate plan view of the shielding plate 14. The original material of the shielding plate 14 is, for example, transparent glass or resin. The shielding plate 14 includes light-transmitting portions 14 a formed at equal intervals between the vertical and horizontal directions, and the shielding portions 14 b. The surface of the shielding portion 14b that has the possibility of being directly irradiated with sunlight is appropriately roughened to a rough surface such as frosted glass. The rough surface processing can be easily performed, for example, when the shielding plate 14 is formed. In addition, it is preferable that the surface of the light-transmitting portion 14a is coated with an anti-reflection (AR) coating. The AR coating can also be applied at the same time as the rough surface processing.

FIG. 7 is a cross-sectional view of a light receiving portion R including a cell 16 and its surroundings. In the figure, a cell 16 is mounted on the bottom of the support portion 15 that has been encapsulated. The support portion 15 on which the cells 16 are placed is mounted on the flexible printed wiring board 13 and sealed with a protective resin 18. The space above the cells 16 is filled with a transparent sealing resin 17. Before the sealing resin 17 is hardened, the shielding plate 14 is placed on the upper surface of the support portion 15. The support portion 15 supports the shielding plate 14 at a position shown in the figure. The lower portion of the light transmitting portion 14 a is housed in the support portion 15 in a state where the sealing resin 17 is interposed between the lower portion and the cell 16. A by-pass diode 19 is provided on a flexible printed wiring board 13 near a cell 16. Bypassing the diode 19 is to short-circuit the battery cell 16 to form a bypass when the battery cell 16 fails.

As described above, although the light transmitting portion 14a is transparent, the surface of the shielding portion 14b is rough. When the OFF-AXIS light is irradiated to the surface of the shielding portion 14b, the rough surface becomes scattered light and is reflected.

FIG. 8 is a cross-sectional view showing an example of a light-gathering type solar power generation unit 1U as a minimum unit of an optical system constituting the light-gathering type solar power generation module 1M. In the figure, when the concentrated solar power generation unit 1U is directly opposite the sun and the incident angle of the sunlight is 0 degrees, the optical axis Ax of the Fresnel lens 12f has a light transmitting portion 14a and a cell 16 by All the light collected by the Fresnel lens 12f is collected in the light transmitting portion 14a, and is guided to the cell 16.

Similarly, FIG. 9 is a cross-sectional view showing an example of a light-gathering type solar power generation unit 1U as the minimum unit of the optical system constituting the light-gathering type solar power generation module 1M. However, in this case, the tracking operation of the sun deviates. For this reason, the concentrated solar power generation unit 1U does not face the sun, and the incident angle of the sunlight is not 0 degrees. In this case, as shown by a two-dot chain line or a dashed line, the light-collecting position deviates from the light-transmitting portion 14a and the light is irradiated to the shielding portion 14b. In such a case, light is reflected by the rough surface scattering of the shielding portion 14b. Therefore, thermal damage to the rough surface of the shielding portion 14b can be prevented.

Since the shielding portion 14b reflects the light scattered by OFF-AXIS, the collected light does not irradiate the support portion 15, the flexible printed wiring board 13, and the bypass diode 19 existing below the shielding plate 14, and Can suppress thermal damage.

"Summary so far"
As described above, the light-shielding solar power generation module 1M or the shielding plate 14 in the light-collecting solar power generation unit 1U is a Fresnel lens 12f and a battery element located at the light collection part 12 on the optical axis. (cell) 16 includes: a light transmitting portion 14a that passes light collected toward the cell 16; and a shielding portion 14b that shields light collected from the cell 16 Off-position light. The original material of the shielding plate 14 is transparent glass or resin, and at least the surface of the shielding portion 14b is a rough surface that scatters light.

In such a concentrated solar photovoltaic power generation module 1M and a concentrated solar photovoltaic power generation unit 1U, when the chase does not deviate, the collected light passes through the light transmitting portion 14a through the Fresnel lens 12f and is guided. Lead to battery cell (cell) 16. On the other hand, it is possible to scatter the sunlight that has deviated from the position of the cell 16 when the tracking deviation has occurred, to scatter it by the rough surface of the shielding portion 14b, and to prevent penetration, and prevent the supporting portion from being penetrated. 15. Thermal damage around the cells of the flexible printed wiring board 13, the bypass diode 19, and the like. A transparent glass or resin is used as a material of the shielding plate 14, and a rough surface of the shielding portion 14 b can be formed by roughening a surface other than the light transmitting portion 14 a. Such a shielding plate 14 can be easily and inexpensively manufactured, and can be disposed closer to the cell 16 than the metal. Therefore, the shielding plate 14 is suitable for light shielding during OFF-AXIS.

In addition, the surface of the shielding portion 14b is roughened, and it can be applied not only to the surface (facing the Fresnel lens 12f side) to the back surface, but it is more effective to apply the surface.
In addition, although the support portion 15 is preferably packaged using the cell 16, unlike the package of the cell 16, other support portions may be provided in the housing 11.

In addition, in the case where the Fresnel lens 12f of the light collecting portion 12 is a primary lens, the light transmitting portion 14a of the secondary lens is integrally formed by using the same material as the shielding portion 14b, and the secondary lens (light transmitting portion 14a) and the shielding portion 14b are integrated, which contributes to a reduction in the number of parts and facilitates assembly.

In addition, in the foregoing example, the shielding plate 14 is formed in a plate shape for each module. In this case, since the single shielding plate 14 is provided, the assembly of the light-concentrating solar power generation module 1M is easy.

Regarding the shape of the shielding plate and the light transmitting portion, various changes can be considered. These changes will be described below.

`` Second example of masking board ''
FIG. 10 is a plan view of a shielding plate 14 of a second example. The difference from FIG. 6 lies in the formation of a split type that is divided into two pieces, and is otherwise the same. The two pieces are mounted in the housing 11 in a state where they are adjacent to each other without a gap. In the case of FIG. 10, since the size of one sheet becomes half that of FIG. 6, there is an advantage that it is easy to handle during manufacture. In addition, the so-called two-piece system may be an example of a plurality of three or more. Since the size of one piece is reduced by division, it is easy to handle during manufacture.

"3rd example of masking board"
FIG. 11 is a plan view of a shielding plate 14 according to a third example. FIG. 6 is different from FIG. 11 in that each of the light-transmitting portions 14 a includes its own shielding portion 14 b. In other words, the shielding plate 14 is formed into a single plate shape for each light collecting section 12 (Fresnel lens 12f). At this time, although the number of the shielding plates 14 is increased, since each piece can be made to a minimum size, it requires only a small amount of material compared to the size indicated by the two-dot chain line when it is on one plate can.

`` Second example of light transmission part ''
FIG. 12 is a cross-sectional view including a cell 16 and a light receiving portion R around the cell 16 and a second example of the light transmitting portion 14a. In the figure, the light transmitting portion 14a in this case is not a spherical lens, but a transparent flat plate. AR coatings can also be applied to the surface. In this case, although the effect of directing the introduced light toward the cell like a spherical lens is small, the light transmitting portion and the shielding portion are integrated, which contributes to the reduction of the number of parts. In addition, since the shielding plate is flat as a whole, it is easy to manufacture and inexpensive.

"The third example of the light transmitting part"
FIG. 13 is a cross-sectional view including a cell 16 and a light receiving portion R around the cell 16 and a third example of the light transmitting portion 14a. In the figure, the light transmitting portion 14a at this time is an opening. In this case, there is no attenuation of light due to space. The material of the shielding plate 14 may be reduced. In addition, although the effect of guiding the introduced light toward a cell like a spherical lens is small, the shielding plate 14 has a flat plate as a whole, which is easy to manufacture and inexpensive.

"The fourth example of the light transmitting part"
FIG. 14 is a cross-sectional view including a cell 16 and a light receiving portion R around the cell 16 and a view showing a fourth example of the light transmitting portion 14a. In the figure, only the upper surface of the light transmitting portion 14a at this time is a spherical lens (that is, a hemisphere). In this case, since the lower surface of the shielding plate 14 is flat, it is easier to manufacture than a spherical lens, and it is cheaper.

"Fifth example of the light transmitting part"
15 is a cross-sectional view including a cell 16 and a light receiving portion R around the cell 16 and a fifth example of the light transmitting portion 14a. In the figure, the light transmitting portion 14a at this time is a spherical lens only on the upper side, and a square columnar shape protruding slightly from the lower side. In this case, since the corner post portion 14 a 1 protruding downward is fitted into the inside of the support portion 15, positioning is easy.

"Sixth example of the light transmitting part"
FIG. 16 is a cross-sectional view including a cell 16 and a light receiving portion R around the cell 16 and a view showing a sixth example of the light transmitting portion 14a. In the figure, the light-transmitting portion 14 a at this time has a flat upper surface, and only the lower portion extends in a pyramid shape to the vicinity of the cell 16. In this case, the pyramidal portion 14 a 2 protruding pyramidally downward can efficiently guide the light introduced from the upper surface of the light transmitting portion 14 a to the cell 16. In addition, it is easily positioned because it is fitted inside the support portion 15.

"other"
In addition, regarding the form of the shielding plate 14 and the form of the light transmitting portion 14a, at least a part of them may be arbitrarily combined with each other.

"supplement"
In addition, it should be considered that all the features of the embodiment disclosed this time are examples and not restrictive. The scope of the present invention is indicated by the scope of the patent application, and it shall include the meaning equivalent to the scope of the patent application and all changes within the scope.

1‧‧‧ array

1M‧‧‧Collection Solar Power Module (Module)

1U‧‧‧ Light Collecting Solar Power Generation Unit

2‧‧‧ support device

11‧‧‧Frame

11b‧‧‧ Underside

12‧‧‧light collection department

12a‧‧‧ glass plate

12f‧‧ Fresnel lens

13‧‧‧ Flexible printed wiring board

13a, 13b ‧‧‧ end

14‧‧‧shield

14a‧‧‧Transmitting section

14a1‧‧‧ Corner post

14a2‧‧‧Angle cone

14b‧‧‧ shelter

15‧‧‧ support

16‧‧‧cell

17‧‧‧sealing resin

18‧‧‧ protective resin

19‧‧‧by-pass diode

21‧‧‧ Pillar

22‧‧‧ base

23‧‧‧2 shaft drive unit

24‧‧‧horizontal axis

25‧‧‧Tracking bracket

25a‧‧‧ Reinforcing material

25b‧‧‧rail

100‧‧‧Solar Power Generation Device

Ax‧‧‧Optical axis

R‧‧‧Light receiving section

[Fig. 1] Fig. 1 is a perspective view of one example of a solar-type photovoltaic power generation device of one light-collecting type viewed from a light-receiving surface side, and shows the photovoltaic power generation device in a completed state.

[Fig. 2] Fig. 2 is a perspective view of one example of a light-gathering type photovoltaic power generation device viewed from the light-receiving surface side, and shows the photovoltaic power generation device in a state of being assembled.

[Fig. 3] Fig. 3 is a perspective view showing a posture of an array facing the sun as an example.

[Fig. 4] Fig. 4 is a perspective view showing an example of a configuration of a light-concentrating solar power generation module.

[FIG. 5] FIG. 5 is a plan view showing an example of a state where a flexible printed wiring board is mounted on the bottom surface of the casing.

[Fig. 6] Fig. 6 is a plan view of a simple substance of a shielding plate.

[FIG. 7] FIG. 7 is a cross-sectional view of a light receiving portion including a cell and its surroundings.

[FIG. 8] FIG. 8 is a cross-sectional view showing an example (in normal time) of a light-gathering solar power generation unit as the smallest unit of an optical system constituting the light-gathering solar power generation module.

[FIG. 9] FIG. 9 is a cross-sectional view showing an example (at the time of OFF-AXIS) of a light-gathering solar power generation unit as the minimum unit of an optical system of the light-gathering solar power generation module.

[Fig. 10] Fig. 10 is a plan view of a shielding plate of a second example.

[Fig. 11] Fig. 11 is a plan view of a shielding plate of a third example.

[Fig. 12] Fig. 12 is a cross-sectional view including a cell and a light receiving portion around the cell, and is a diagram showing a second example of the light transmitting portion.

[Fig. 13] Fig. 13 is a cross-sectional view including a cell and a light receiving portion around the cell and a third example of a light transmitting portion.

[FIG. 14] FIG. 14 is a cross-sectional view including a cell and a light receiving portion around the cell, and shows a fourth example of the light transmitting portion.

[Fig. 15] Fig. 15 is a cross-sectional view including a cell and a light receiving portion around the cell, and is a view showing a fifth example of the light transmitting portion.

[FIG. 16] FIG. 16 is a cross-sectional view including a cell and a light receiving portion around the cell and a sixth example of the light transmitting portion.

Claims (8)

A light-gathering type solar power generation module is composed of a plurality of light-gathering type solar power generation units that collect sunlight to generate electricity, and are arranged in a frame. Department has: The light collecting part collects the incoming sunlight; A flexible printed wiring board is provided on the bottom surface of the frame; A cell is disposed on the flexible printed wiring board at a position consistent with the optical axis of the light collecting part when facing the sun, and performs photoelectric conversion on the light after the light is collected; The shielding plate is located between the light collecting portion and the battery cell on the optical axis, wherein a light transmitting portion is formed to pass the light collected toward the battery cell, and the light shielding portion has a deviation from the light shielding portion. A light shielding portion that collects light at the position of the aforementioned cell; and, The support part supports the shielding plate at a predetermined position in the housing, The material of the shielding plate is transparent glass or resin, and at least the surface of the shielding portion is a rough surface that scatters the received light. The light-gathering solar power generation module according to claim 1, wherein, when the light-collecting part is a primary lens, the light-transmitting part guides the light collected by the primary lens to The secondary lens of the aforementioned cell, The secondary lens is integrally formed using the same material as the shielding portion. The light-gathering solar photovoltaic power generation module according to claim 1, wherein the light-transmitting portion is connected to the shielding portion without a rough surface and is transparent as a whole. The light-gathering type solar photovoltaic power generation module according to claim 1, wherein the light transmitting portion is formed in an opening of the shielding plate. The light-gathering type solar photovoltaic power generation module according to any one of claim 1 to claim 4, wherein each of the aforementioned shielding plates forms a plate shape. The light-gathering type solar photovoltaic power generation module according to any one of claim 1 to claim 4, wherein each of the above-mentioned shielding plates is formed in a plurality of plates. The light-concentrating solar power generation module according to any one of claim 1 to claim 4, wherein each of the light-shielding plates forms an independent plate shape. A light-gathering type solar power generation device is characterized by arranging a plurality of light-gathering type solar power generation modules as claimed in claim 1 on a support for tracking the sun to form an array.