Renovation structure of solar power generation facilities
By installing sheet-shaped solar cells with adhesive or fitting mechanisms on existing panels, the challenge of varying silicon-based panel sizes and performance is addressed, enabling efficient and aesthetic facility upgrades.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SEKISUI CHEMICAL CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-06-29
Smart Images
Figure 2026106379000001_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a retrofit structure for photovoltaic power generation equipment.
Background Art
[0002] Photovoltaic power generation equipment currently mainly uses silicon-based solar cell panels. Silicon-based solar cell panels are formed as thick and relatively large panels surrounded by an aluminum panel frame around the solar cell body. Such photovoltaic power generation equipment is retrofitted when a failure occurs or when function updates are needed.
[0003] Patent Document 1 proposes a retrofit structure when one solar cell panel constituting photovoltaic power generation equipment fails. The retrofit structure of Patent Document 1 is to stack another new silicon-based solar cell panel on top of the failed silicon-based solar cell panel. Note that Patent Document 1 is an example for easily explaining the current situation of retrofitting photovoltaic power generation equipment and does not limit the present invention.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] Silicon-based solar cell panels are sized depending on the size of the cells made of silicon in manufacturing. Therefore, the cell sizes of silicon-based solar cell panels vary depending on the manufacturing year.
[0006] Furthermore, silicon-based solar panels are constantly evolving, and their power generation performance and electrical characteristics vary depending on the year of manufacture. Therefore, when solar power generation equipment that has been in use for a long time is refurbished, there is a high probability that replacement solar panels (i.e., panels of roughly the same specifications and performance but inferior) no longer exist.
[0007] Therefore, the repair structure described in Patent Document 1, which involves stacking another new silicon-based solar panel on top of a faulty silicon-based solar panel, is not practical and is highly unlikely to be successfully implemented.
[0008] Therefore, the main objective of the present invention is to contribute to improving the above-mentioned problems. [Means for solving the problem]
[0009] To address the above issues, the present invention features a modification structure for a solar power generation facility in which sheet-shaped solar cells are installed on top of an existing solar power generation facility. [Effects of the Invention]
[0010] The present invention, with the above configuration, can reliably modify existing solar power generation facilities. [Brief explanation of the drawing]
[0011] [Figure 1] This is a perspective view showing the roof of a building where the renovation structure for the solar power generation facility according to this embodiment is implemented. [Figure 2] This is a perspective view showing the roof of a different building than the one in Figure 1. [Figure 3] Figure 1 or Figure 2 is a plan view of the solar panels that make up an existing solar power generation facility. [Figure 4] This diagram shows the remodeling structure of a solar power generation facility; (a) is a partial side view, and (b) is an enlarged longitudinal cross-sectional view of the X portion of (a). [Figure 5] This is a side view of a modified example of Figure 4 using a hook fitting, as seen in the direction of line AA in Figure 3. [Figure 6A]Another modification example of FIG. 4 using a clamping fitting, (a) is a side view similar to FIG. 5, and (b) is an overall plan view of the solar panel. [Figure 6B] A modification example of the clamping fitting of FIG. 6A, (a) is a side view similar to FIG. 6A(a), (b) is a rear view of (a), and (c) is a partial plan view of (a). [Figure 6C] Another modification example of the clamping fitting of FIG. 6A, (a) is a side view, (b) is a rear view, (c) is a plan view, and (d) is a side view showing a state where the clamping width is changed. [Figure 7] It is a partially enlarged side view seen in the direction of the B-B line of FIG. 3. [Figure 8] It is a side view showing a state where a bridging plate is installed between adjacent solar panels. [Figure 9] (a) is a plan view of a sheet-shaped solar cell, and (b) is a cross-sectional view of the sheet-shaped solar cell. [Figure 10] It is a cross-sectional view showing a state where the sheet-shaped solar cell is bent. [Figure 11] It is a plan view of a modification example of the sheet-shaped solar cell. [Figure 12] It is a bottom view showing the connection state of the sheet-shaped solar cells.
Embodiment for Carrying Out the Invention
[0012] This embodiment will be described in detail with reference to FIGS. 1 to 12.
Examples
[0013] <Configuration>This example has the following configuration.
[0014] FIGS. 1 and 2 each show a building 1, and the building 1 has a solar power generation facility 3 on the roof 2. The roof 2 can be of various types, such as an inclined roof like FIG. 1 or an almost horizontal flat roof like FIG. 2. Note that the solar power generation facility 3 is not limited to the roof 2 of the building 1 and can also be installed on the ground.
[0015] Here, Building 1 is a building fixed on the land, which can be any type such as a detached house or an apartment building. The structure of Building 1 can be any type such as wooden structure, lightweight steel frame structure, reinforced concrete structure, etc. In this embodiment, it is a unit building. The unit building is Building 1 that can be constructed in a short period by transporting building units pre-manufactured in a factory to the construction site and assembling them at the construction site.
[0016] Roof 2 is a structure provided on the upper part of Building 1 (the main body), which protects the upper part of Building 1 and blocks the inside of Building 1 from the outside world.
[0017] The solar power generation facility 3 is a facility that generates electricity by sunlight. As shown in FIG. 3, the existing solar power generation facility 3 mainly uses a silicon-based solar cell panel 4. The silicon-based solar cell panel 4 is formed into a thick and relatively large panel that surrounds the periphery of a solar cell body 5 formed in a rectangular plate shape with a panel frame 6 made of a light metal such as aluminum.
[0018] The solar power generation facility 3 is repaired when a failure occurs or when a function update is performed.
[0019] The repair structure of the solar power generation facility 3 in this embodiment is configured as follows.
[0020] (1) As shown in FIG. 4, the repair structure of the solar power generation facility 3 is such that a sheet-shaped solar cell 11 is stacked and installed on the upper part of the existing solar power generation facility 3.
[0021] Here, the existing solar power generation facility 3 is a facility that generates electricity by sunlight installed on the roof 2 of Building 1. The existing solar power generation facility 3 is repaired when a part or all of the solar cell panels 4 constituting the solar power generation facility 3 fail due to long-term use or when a function update is performed.
[0022] The existing solar power generation equipment 3 may consist of silicon-based solar panels 4 laid out along the surface of the roof 2 (sloping roof) to cover almost the entire surface of the roof 2, as shown in Figure 1. Alternatively, the existing solar power generation equipment 3 may consist of silicon-based solar panels 4 arranged to form multiple rows 12, as shown in Figure 2, with each row 12 of solar panels 4 installed at an angle so as to float above the roof 2 (flat roof). Note that the existing solar power generation equipment 3 may refer to all the solar panels 4 installed on the roof 2, or to some of the solar panels 4.
[0023] A sheet-type solar cell 11 is a thin, planar solar cell formed in the shape of a sheet or film (sheet-type solar cell or film-type solar cell). A sheet-type or film-type refers to a shape consisting of thin surfaces, such as paper or cloth. Generally, a sheet or film refers to a material that is thicker than foil but thinner than a plate. A sheet or film has a thickness of several millimeters or less. Note that a sheet-type solar cell 11 may also include thin plate-type materials (thin plate-type solar cells) as long as they are thin materials with a thickness of several millimeters or less. Further details of other sheet-type solar cells 11 will be described later.
[0024] The sheet-shaped solar cell 11 may be sized and shaped to cover almost the entire solar power generation equipment 3 installed on the roof 2, and only one sheet may be installed. Installing only one sheet-shaped solar cell 11 is suitable for the case shown in Figure 1 (such as when solar panels 4 are laid out on the roof 2).
[0025] Furthermore, multiple sheet-shaped solar cells 11 may be installed, each sized and shaped to cover a portion of the solar power generation equipment 3 installed on the roof 2. Installing multiple sheet-shaped solar cells 11 is suitable for the case shown in Figure 2 (such as when the solar panels 4 are arranged in 12 rows or when the solar panels 4 are installed individually). In this case, the sheet-shaped solar cells 11 may be sized and shaped to match the rows 12 of the solar panels 4 and installed separately for each row 12. Alternatively, the rows 12 of the solar panels 4 may be further divided into multiple regions, and the sheet-shaped solar cells 11 may be sized and shaped to match each region and installed in each region. The regions may be, for example, the size of each individual solar panel 4 or other sizes.
[0026] However, even in the case of Figure 1, multiple sheet-shaped solar cells 11 can be installed, each sized and shaped to cover a portion of the solar power generation equipment 3 installed on the roof 2. Similarly, even in the case of Figure 2, only one sheet-shaped solar cell 11 can be installed, each sized and shaped to cover almost the entire solar power generation equipment 3 installed on the roof 2.
[0027] The above describes the case of renovating the entire existing solar power generation facility 3, but structurally, it is also easy and possible to renovate only a portion of the solar panels 4 of the existing solar power generation facility 3 if sheet-type solar cells 11 are used.
[0028] Overlapping installation involves installing a sheet-shaped solar cell 11 over the surface of the existing solar power generation equipment 3, or all or part of the surface of the roof 2 on which the existing solar power generation equipment 3 is located. In the case of a sheet-shaped solar cell 11, by covering it on top of the existing solar power generation equipment 3, the sheet-shaped solar cell 11 covers or wraps the surface of the existing solar power generation equipment 3. The sheet-shaped solar cell 11 can be integrated with the existing solar power generation equipment 3 or all or part of the roof 2 by attaching it to them. For integration, as shown in Figure 4, the sheet-shaped solar cell 11 may be placed over the surface of the solar cell panel 4 from above to create a nearly tight fit, and then fixed with adhesive fixing means (attachment means) such as adhesive or double-sided tape (adhesive fixing part 14). By integrating with the existing solar power generation equipment 3 or all or part of the roof 2, the sheet-shaped solar cell 11 becomes inconspicuous from the outside and its presence is almost undetectable. In this case, the adhesive fixing portion 14 may be fully bonded to the surface of the solar cell panel 4, or partially bonded. The adhesive fixing portion 14 is designed to maintain sufficient adhesive strength over a long period of time to prevent peeling due to wind, rain, or sunlight.
[0029] Furthermore, the sheet-shaped solar cell 11 may be placed over the surface of the solar panel 4 from above (without adhesive fixing) and be in close contact with it (non-adhesive portion 15), as described later. In this case, the sheet-shaped solar cell 11 may have an adhesive layer on its back surface to make it difficult to peel off, or it may be fixed to the roof 2 or solar panel 4 with auxiliary fixing means (various metal fittings or string-like members, etc.), or an adhesive layer and auxiliary fixing means may be provided in combination. As a result, the sheet-shaped solar cell 11 is integrated with the solar panel 4.
[0030] The vertical direction can be based on the ground, the surface of the roof 2, or the surface of the solar panel 4. In this embodiment, the vertical direction is mainly defined as the direction perpendicular to the surface of the solar panel 4, but the reference point may differ depending on the circumstances described. Also, where necessary, "up" will be referred to as one side of the vertical direction, and "down" as the other side of the vertical direction.
[0031] (2) As shown in Figure 5, in the remodeled structure of the photovoltaic power generation equipment 3, the sheet-shaped solar cell 11 may be hooked and fixed to the panel frame 6 of the existing photovoltaic power generation equipment 3 by hooking fittings 22 provided on the edge 21.
[0032] Here, it is preferable to install the sheet-shaped solar cell 11 so that its edge 21 is approximately aligned with the edge of the surface of the solar power generation equipment 3 (or solar panel 4) to be remodeled. The hook fitting 22 is an auxiliary fixing means for fixing the sheet-shaped solar cell 11 to the solar panel 4 while it is covering the surface of the solar panel 4. The hook fitting 22 is provided integrally with or separately from the sheet-shaped solar cell 11. The hook fitting 22 is a hook member that locks onto the lower part of the panel frame 6. The hook member has a locking portion 22a for the lower part of the panel frame 6 and an attachment portion 22b for the sheet-shaped solar cell 11. The locking portion 22a and the attachment portion 22b of the hook fitting 22 (hook member) are made according to the cross-sectional shape of the panel frame 6. The sheet-shaped solar cell 11 may also have all or part of its edge 21 extended to cover the side of the solar power generation equipment 3 (or solar panel 4) to be remodeled. As a result, the solar panel 4 is covered with the sheet-like solar cells 11 (or their extended portion) up to the sides of the panel frame 6.
[0033] Various types of panel frames 6 exist and any type is acceptable, but in this embodiment, as shown in Figure 3, it is composed of four frame members 23 (a pair of vertical frame members and a pair of horizontal frame members) that extend along each side of the rectangular solar cell body 5. The four frame members 23 are assembled in a rectangular shape to surround the solar cell body 5 and form the solar cell panel 4. As shown in the cross-sectional view in Figure 4(b), the frame member 23 has a receiving groove 23a at its upper end that accommodates the side of the solar cell body 5, and a flange portion 23b at its lower end that is parallel to the surface of the solar cell body 5. The receiving groove 23a and the flange portion 23b extend substantially along the longitudinal direction of the frame member 23. The flange portion 23b is an inner flange of a certain width. The hook member has a locking portion 22a that locks onto the flange portion 23b of the frame member 23. As a result, the sheet-shaped solar cell 11 is secured to the frame member 23 of the solar cell panel 4 by the locking portion 22a of the hook fitting 22 (hook member) so that it does not detach from the solar cell panel 4. Note that the cross-sectional shape of the frame member 23 is not limited to the above.
[0034] The hooking brackets 22 may be long and extend along each side of the solar cell body 5 or along the frame members 23 attached to each side, and may be installed continuously or discontinuously around the entire circumference of the solar cell panel 4. Alternatively, long hooking brackets 22 may be installed continuously or discontinuously along two opposing sides of the solar cell panel 4. Long hooking brackets 22 can be installed individually with a length that extends almost the entire length of each side of the solar cell body 5 or along the frame members 23, or multiple brackets of a shorter length can be installed. Alternatively, small (short) hooking brackets 22 may be installed partially at key locations on the solar cell panel 4, such as corners or their vicinity, or in the middle of the sides (intermediate points, equidiated points). In this case, the installation position and number of small hooking brackets 22 will be optimally set according to the size of the solar cell panel 4.
[0035] (3) As shown in Figure 6A (~Figure 6C), in the remodeled structure of the photovoltaic power generation equipment 3, the sheet-shaped solar cell 11 may be clamped and fixed to the panel frame 6 of the existing photovoltaic power generation equipment 3 by clamping fittings 25 at its edges 21.
[0036] Here, the clamping fitting 25 is an auxiliary fixing means similar to the hook fitting 22 above for fixing the sheet-shaped solar cell 11 to the solar panel 4 while it is placed over the surface of the solar panel 4. The clamping fitting 25 is provided as a separate component from the sheet-shaped solar cell 11. The clamping fitting 25 is a clamp that clamps and fixes the sheet-shaped solar cell 11 together with the upper and lower parts of the panel frame 6 of the solar panel 4. The clamp may have an upper clamp piece 25a, a lower clamp piece 25b, and a connector 25c. The upper clamp piece 25a and the lower clamp piece 25b may be separate or connected by a hinge. The connector 25c may have a bolt and nut that fastens and fixes the upper clamp piece 25a and the lower clamp piece 25b vertically. One of the bolts and nuts of the connector 25c may be pre-fixed to one of the upper clamp piece 25a and the lower clamp piece 25b. The connector 25c is provided on the outside of the sheet-shaped solar cell 11.
[0037] Specifically, the clamping fitting 25 may be formed by creating an upper clamp piece 25a and a lower clamp piece 25b in a substantially Z-shape, each having a lateral surface, a vertical surface, and an overhang, and fastening and fixing the overlapping overhangs with a connector 25c. The lateral surface and overhang extend in the planar direction of the solar cell panel 4, while the vertical surface and connector 25c extend in the thickness direction of the solar cell panel 4. The lateral surface is located on the inside of the solar cell panel 4 and overlaps with the front and back surfaces of the solar cell panel 4, while the overhang is located on the outside of the solar cell panel 4.
[0038] The upper clamp piece 25a and the lower clamp piece 25b may have contact portions 25d formed on their opposing lateral surfaces to directly contact and hold the solar cell panel 4 and the sheet-shaped solar cell 11. The contact portions 25d may also have fine irregularities (for example, peaks and valleys for anti-slip purposes or knurled sections) to increase the clamping force. The upper clamp piece 25a may be attached integrally to the sheet-shaped solar cell 11. If necessary, the upper clamp piece 25a may be referred to as the first clamp piece and the lower clamp piece 25b as the second clamp piece.
[0039] The clamp then uses an upper clamp piece 25a and a lower clamp piece 25b to clamp the housing groove portion 23a and flange portion 23b of the frame member 23 from above and below.
[0040] As shown in the example in Figure 6A, the clamping brackets 25 may be small (short) and partially attached to key locations on the solar panel 4, such as the corners or their vicinity, or the middle of the sides (intermediate points, equidiated points). In this case, the installation position and number of the small clamping brackets 25 will be optimally set according to the size of the solar panel 4.
[0041] Alternatively, the clamping brackets 25 may be long and extend along each side of the solar cell body 5 or along the frame members 23 attached to each side, as shown in the example in Figure 6B, and may be provided continuously or discontinuously around the entire circumference of the solar cell panel 4. Furthermore, long clamping brackets 25 may be provided continuously or discontinuously along two opposing sides of the solar cell panel 4. Long clamping brackets 25 can be installed individually, extending approximately the entire length of each side of the solar cell body 5 or along the frame members 23, or multiple brackets of a shorter length can be installed.
[0042] Furthermore, the long clamping bracket 25 can be of a fixed length, or multiple brackets of different lengths may be prepared and used interchangeably. Alternatively, as shown in the example in Figure 6B, the length may be adjustable to the optimal length according to the edges of the solar panel 4.
[0043] In this case, the clamping fitting 25 is provided with, for example, adjustment pieces 26a and 26b extending in the longitudinal direction to the upper clamp piece 25a and the lower clamp piece 25b, respectively. The adjustment pieces 26a and 26b are approximately the same size as the upper clamp piece 25a and the lower clamp piece 25b, but slightly larger, and are installed to slide in the longitudinal direction, partially overlapping the outer surfaces of the upper clamp piece 25a and the lower clamp piece 25b. The clamping fitting 25 is then fastened and secured between the protruding portions of the upper clamp piece 25a and the lower clamp piece 25b and the protruding portions of the adjustment pieces 26a and 26b using a connector 25c.
[0044] Furthermore, the adjustment pieces 26a and 26b form fine irregularities similar to the contact portion 25d between the opposing surfaces of the upper clamp piece 25a and the lower clamp piece 25b in the portions that do not overlap with them. The contact portion 25d of the adjustment pieces 26a and 26b is made larger by the thickness of the upper clamp piece 25a and the lower clamp piece 25b so that the solar cell panel 4 and the sheet-shaped solar cell 11 can be held in contact with each other without any problems.
[0045] The clamping bracket 25 has through holes 29 formed in the overlapping portions of the protruding upper clamp piece 25a and lower clamp piece 25b and the protruding portions of the adjustment pieces 26a and 26b, through which a connector 25c passes. One of the through holes 29 between the protruding portions of the upper clamp piece 25a and lower clamp piece 25b and the protruding portions of the adjustment pieces 26a and 26b is a round hole, and the other is an elongated hole 29a that extends in the longitudinal direction. The upper clamp piece 25a and lower clamp piece 25b and the adjustment pieces 26a and 26b are fastened and fixed together by the connector 25c at the position where the elongated hole 29a and the round hole align. Therefore, one clamping bracket 25 can accommodate various solar panels 4 (photovoltaic power generation equipment 3) with different side lengths.
[0046] Furthermore, the clamping fittings 25 may have a fixed clamping width, or multiple fittings with different clamping widths may be provided and used interchangeably. Alternatively, as shown in the example in Figure 6C, the clamping width x may be adjustable to achieve the optimal thickness according to the solar cell panel 4. The clamping width is the width between the contact portion 25d of the upper clamp piece 25a and the lower clamp piece 25b when the solar cell panel 4 and the sheet-shaped solar cell 11 are clamped together.
[0047] In this case, the clamping fitting 25 is formed, for example, by creating an L-shape with an upper clamp piece 25a and a lower clamp piece 25b, each having a horizontal surface and a vertical surface, overlapping the vertical surfaces, and fastening and fixing the overlapping vertical surfaces with a connector 25c. The horizontal surface and the connector 25c extend in the plane direction of the solar cell panel 4, and the vertical surface extends in the thickness direction of the solar cell panel 4.
[0048] The upper clamping piece 25a and the lower clamping piece 25b may be provided with a contact member for the solar cell panel 4 on the opposing surfaces of the lateral surface portion, instead of the fine concavo-convex portions of the contact portion 25d. The contact member may be, for example, an elastic material having insulation, member buffering properties, and adhesion, such as rubber, butyl rubber, or a foamed rubber-based sealing material (ept sealant (trademark)). When the contact portion 25d (contact member) is formed of an elastic material, the contact member is compressed by elastic deformation when clamping the solar cell panel 4 or the like. Therefore, in FIG. 6C(a), the clamping width x becomes x1. Note that the fine concavo-convex portions in FIGS. 6A and 6B may also be the contact member. Further, the contact member in FIG. 6C may be a fine concavo-convex portion.
[0049] And, a through hole 29 for passing a connecting tool 25c is formed in a portion where the vertical surface portions of the upper clamping piece 25a and the lower clamping piece 25b overlap. One of the through holes 29 of the upper clamping piece 25a and the lower clamping piece 25b is a round hole, and the other is a long hole 29b extending in the thickness direction of the solar cell panel 4. The upper clamping piece 25a and the lower clamping piece 25b are fastened and fixed by the connecting tool 25c at a position where the long hole 29b and the round hole coincide. Thereby, the clamping fitting 25 constitutes an adjustment portion for the clamping width x at a portion where the vertical surface portions are overlapped and at the through hole 29 including the long hole 29b and the round hole. And, the clamping width x of the clamping fitting 25 can be varied within the formation range of the long hole 29b (for example, x1 in FIG. 6C(a) and x2 in FIG. 6C(d) (x1 < x2)). Therefore, the clamping fitting 25 can correspond to various solar cell panels 4 (photovoltaic power generation equipment 3) having different thicknesses with just one.
[0050] Furthermore, the clamping fitting 25 may be provided with a length adjustment portion and an adjustment portion for the clamping width x so that both length adjustment and adjustment of the clamping width x can be performed. Similarly to the clamping fitting 25, the hook fitting 22 in FIG. 5 may be provided with one or both of a length adjustment portion and an adjustment portion for the locking width so that one or both of length adjustment and adjustment of the locking width can be performed.
[0051] The clamping bracket 25 can be used in combination with the hooking bracket 22. Furthermore, even when either or both of the hooking bracket 22 and the clamping bracket 25 are used to fix the sheet-shaped solar cell 11, the sheet-shaped solar cell 11 may also be adhesively fixed to the surface of the solar cell panel 4 using the adhesive fixing portion 14. In this case, it is preferable that the adhesive fixing portion 14 be weaker than when the sheet-shaped solar cell 11 is fixed using only the adhesive fixing portion 14.
[0052] (4) As shown in Figure 8, in the remodeled structure of the photovoltaic power generation equipment 3, the existing photovoltaic power generation equipment 3 may have a plurality of solar cell panels 4 spaced apart from each other. A connecting plate 27 may be installed between the plurality of solar cell panels 4. The sheet-shaped solar cell 11 may be installed across the solar cell panels 4 on both sides of the connecting plate 27.
[0053] Here, as shown in Figure 1, even when solar panels 4 cover almost the entire surface of the roof 2, there may be solar panels 4 installed with almost no gaps between them and solar panels 4 installed with gaps between them. Also, as shown in Figure 2, when solar panels 4 are installed in rows 12, multiple solar panels 4 are spaced apart from each other between adjacent rows 12. Furthermore, the solar panels 4 that make up each row 12 may be installed with a slight gap between them.
[0054] The space between the solar panels 4 is the panel gap 28, and with respect to the surface of the solar panel 4, there are two types: one with almost no height difference as shown in Figure 1, and another with a height difference as shown in Figure 2.
[0055] The connecting plate 27 is a plate-shaped member that fills the gaps (panel gaps 28) between the solar panels 4. The connecting plate 27 is formed to have a width and length that matches the width and length of the panel gaps 28. When there is no difference in height between the solar panels 4, the connecting plate 27 is installed almost flush with or parallel to the surface of the solar panels 4. When there is a difference in height between the solar panels 4, the connecting plate 27 is installed at an angle to the surface of the solar panels 4 (to bridge the height difference). The connecting plate 27 may be installed to span directly between the solar panels 4, or it may be provided with legs 27a to stand independently on the roof 2. The sheet-shaped solar cells 11 are installed continuously on the connecting plate 27 and across the solar panels 4 on both sides of the connecting plate 27.
[0056] Conversely, the bridge plate 27 can also be structurally configured as a component that divides the sheet-like solar cells 11 into multiple sections. In this case, the sheet-like solar cells 11 are not placed on the bridge plate 27, but are instead placed separately on the solar panels 4 on both sides of the bridge plate 27.
[0057] (5) In the remodeled structure of the above-mentioned photovoltaic power generation equipment 3, the sheet-shaped solar cell 11 may be translucent (sheet-shaped translucent solar cell 31).
[0058] Here, the sheet-shaped solar cell 11 is often formed to have light-shielding properties, but it may also be formed to have light-transmitting properties. A light-transmitting sheet-shaped solar cell 11 is made of a transparent resin. By covering the existing solar power generation equipment 3 with the light-transmitting sheet-shaped solar cell 11, the light transmitted through the sheet-shaped solar cell 11 reaches the existing solar power generation equipment 3. As a result, the existing solar power generation equipment 3 becomes capable of generating electricity. The transparent resin is preferably colorless and transparent, but it may also be colored and transparent. In this case, it is preferable to use a transparent (for example, colorless and transparent) adhesive fixing part 14.
[0059] Furthermore, if the sheet-shaped solar cell 11 is of the perovskite type as described later, the effective wavelength range is 360 to 800 nm. Also, if the existing silicon-based solar cell panel 4 is of the thin-film silicon type, the effective wavelength range is 600 nm to 1200 nm, and if it is of the polycrystalline silicon type, the effective wavelength range is 300 nm to 1200 nm. Therefore, since the sheet-shaped solar cell 11 and the existing solar power generation equipment 3 have different effective wavelength ranges, it is possible to generate electricity simultaneously with both. In this case, it is preferable to separate the electrical systems of the sheet-shaped solar cell 11 and the existing solar power generation equipment 3 (or to provide separate power conditioners) to prevent the power from mixing.
[0060] (Regarding the sheet-shaped solar cell 11) Figures 9 to 11 show sheet-shaped solar cells 11, and these figures will be used to explain sheet-shaped solar cells 11 below.
[0061] The sheet-shaped solar cell 11 shown in Figure 9 is a solar cell that has been processed and formed into a sheet shape. The sheet-shaped solar cell 11 may be relatively thin and flexible (sheet-shaped, film-shaped) that can be bent, stretched, and rolled up, as shown in Figure 10. Alternatively, the sheet-shaped solar cell 11 may be relatively thick and rigid (thin plate-shaped) that can be flexed. In other words, the sheet-shaped solar cell 11 can be formed to be relatively thin and flexible, or relatively thick and rigid so that it can maintain its shape on its own.
[0062] The sheet-shaped solar cell 11 can be of any type, but it can be a perovskite solar cell. The sheet-shaped solar cell 11 can broadly include organic thin-film solar cells, dye-sensitized solar cells, and other solar cells that can be formed into a sheet. In this embodiment, the sheet-shaped solar cell 11 will be described as a perovskite solar cell.
[0063] Perovskite solar cells are solar cells that use compounds with a crystalline structure called perovskite as the photoelectric conversion material, and can be formed into relatively thin sheets. Perovskite originally refers to the unique crystalline structure of titanite, and the term perovskite is used as a general term for various materials that have this unique crystalline structure. Perovskite solar cells have been rapidly developed in recent years and have achieved energy conversion efficiencies comparable to silicon-based solar cells. In addition, non-silicon materials such as amorphous silicon and semiconductor materials containing copper, indium, gallium, and selenium (CIGS) can also be used as photoelectric conversion materials similar to perovskite solar cells. Solar cells using these photoelectric conversion materials can also be made into sheet-shaped solar cells 11, similar to perovskite solar cells.
[0064] In particular, perovskite solar cells can be mass-produced by coating or printing, making them resistant to distortion, and offering the potential for lower costs and installation in locations where silicon-based solar cells cannot be installed. Furthermore, because perovskite solar cells are lighter than silicon-based solar cells, building 1 can be fitted with perovskite solar cells without the need for reinforcement.
[0065] As shown in Figure 9(a), the sheet-shaped solar cell 11 has a battery body 32 made of a resin sheet. The resin forming the battery body 32 may be soft or hard. In the case of a translucent sheet-shaped solar cell 11, the resin forming the battery body 32 is transparent.
[0066] The battery body 32 of the sheet-shaped solar cell 11 has a rectangular power generation area 33 that is slightly smaller inside the rectangular surface. The frame-shaped portion outside the power generation area 33 (the edge 21 of the sheet-shaped solar cell 11) is a blank area 34 where there is no power generation area 33.
[0067] The power generation region 33 has multiple power generation elements, which are cells 35, formed inside. In the case of a perovskite solar cell, the cells 35 are made of perovskite. In the case of solar cells other than perovskite solar cells, the cells 35 are made of power generation elements other than perovskite. The multiple cells 35 are each made of approximately the same size and shape (rectangular) and extend along either the long side direction (Figure 9) or the short side direction (Figure 11) of the approximately rectangular battery body 32. The multiple cells 35 are connected in series or parallel as appropriate.
[0068] (Regarding the array in cell 35) Furthermore, the sheet-shaped solar cell 11 allows for the arrangement of cells 35 to be either along the short side or along the long side of the battery body 32, depending on the orientation of the roof 2. The arrangement of cells 35 affects the power generation efficiency of the sheet-shaped solar cell 11.
[0069] In other words, each cell 35 is an element that generates electricity from sunlight. It generates electricity when sunlight hits the entire cell 35, and stops generating electricity when a shadow falls on the cell 35 and sunlight no longer hits the entire cell. Furthermore, if there are other buildings or trees taller than the roof 2 around the roof 2, the roof 2 will be shaded, resulting in some cells 35 not generating electricity due to the shadow. Since the sun moves roughly from east to west, the shadows also move east to west along with the movement of the sun.
[0070] Therefore, by arranging the cells 35 of the sheet-shaped solar cell 11 almost in an east-west direction, a larger proportion of cells 35 can be secured that are not shaded, thus improving power generation efficiency. In this case, the cells 35 will have a shape that extends almost in a north-south direction.
[0071] Specifically, as shown in Figure 9(a), when the cells 35 extending in the direction of the long side of the battery body 32 are arranged in the direction of the short side of the battery body 32, it is preferable to install the battery body 32 with its short side facing approximately east-west. In this case, the long side of the battery body 32 is oriented north-south, and the cells 35 extend in the north-south direction (long side direction).
[0072] Conversely, as shown in Figure 11, when the cells 35 extending in the direction of the short side of the battery body 32 are arranged in the direction of the long side of the battery body 32, it is preferable to install the battery body 32 with its long side facing approximately east-west. In this case, the short side of the battery body 32 is oriented north-south, and the cells 35 extend in the north-south direction (short side direction).
[0073] In reality, it is difficult to orient the battery body 32 precisely east-west or north-south, and in most cases it is oriented in a direction intermediate between east-west and north-south. In such cases, the cells 35 of the battery body 32 should be arranged along the side of the shorter and longer sides that is closer to the east-west orientation.
[0074] However, the above is a measure to improve power generation efficiency when considering only the movement of the sun and the movement of shadows. The arrangement of cells 35 in the battery body 32 is affected by various factors other than the movement of the sun as described above, such as the arrangement and shape of the roof 2 and the influence of other surrounding buildings and trees. Therefore, it is preferable to determine the arrangement of cells 35 comprehensively, taking these factors into account. When a sheet-shaped solar cell 11 is installed on the roof 2, the cells 35 will be oriented either vertically or horizontally relative to the roof 2. In Figure 1, the cells 35 are arranged either vertically or horizontally in the direction of the slope of the roof 2. In Figure 2, the cells 35 are arranged either in the direction in which the rows 12 of the solar cell panel 4 extend or in the direction in which the rows 12 are aligned. All sheet-shaped solar cells 11 installed on the same roof 2 should have the same arrangement of cells 35.
[0075] (Regarding the structure of the sheet-shaped solar cell 11) As shown in Figure 9(b), the sheet-shaped solar cell 11 has a structure in which the cells 35 and the like are arranged in the space between a resin backsheet 36 and a transparent resin frontsheet 37 that are parallel to each other, and then sealed with resin (sealing resin 38). The backsheet 36, frontsheet 37, and sealing resin 38 are the resins that form the battery body 32 of the sheet-shaped solar cell 11. The entire outer surface of the sheet-shaped solar cell 11, including the front and back surfaces, can be covered with a transparent protective layer 39. The transparent protective layer 39 may be formed by applying a transparent resin curing agent with weather resistance, waterproofing, and physical strength as a protective material (topcoat). The transparent protective layer 39 can be formed as a single layer or in multiple layers. The transparent protective layer 39 may also be provided only on the surface of the sheet-shaped solar cell 11.
[0076] Furthermore, it is preferable to attach the sheet-shaped solar cell 11 to the solar cell panel 4 using the hook fittings 22 and clamping fittings 25 described above, mainly by using the excess portion 34 appropriately provided around the outer periphery of the power generation area 33.
[0077] Furthermore, the sheet-shaped solar cell 11 is equipped with an internal junction box 41 in the remaining space 34. The electricity generated by the cell 35 is collected in the internal junction box 41 via internal wiring 42. A junction box is a connector or electrical connection box installed at the connection point between electrical wires in electrical work, and is used to simplify the routing of wiring and to facilitate connections between wiring.
[0078] As shown in the modified example in Figure 11, the sheet-shaped solar cell 11 may have a protruding portion 43 (or extension) that partially protrudes from the margin portion 34 in order to provide an internal junction box 41 at a desired position. The internal junction box 41 is provided at the end of the protruding portion 43. The protruding portion 43 is formed to be narrower than the battery body 32 and wider than the internal junction box 41. This protruding portion 43 makes the sheet-shaped solar cell 11 non-rectangular in shape.
[0079] (Regarding the placement of the internal junction box 41) Furthermore, as shown in Figure 4 (or Figure 7), it is preferable to position the sheet-shaped solar cell 11 so that the internal junction box 41 wraps around to the back side of the solar cell panel 4. The portion of the internal junction box 41 that wraps around to the back side may be attached to the underside of the flange portion 23b of the panel frame 6 of the solar cell panel 4. It is preferable to provide the internal junction box 41 in a position or on an edge of the solar cell panel 4 where the hook fitting 22 in Figure 5 and the clamping fittings 25 in Figures 6A to 6C are not present.
[0080] In this case, it is preferable that the sheet-shaped solar cell 11 is bent gently so that no excessive force is applied and the sheet-shaped solar cell 11 is not damaged (within the allowable deformation range). The sheet-shaped solar cell 11 is bent into a gentle curved shape with a large radius of curvature, without clear fold lines or sharp bends (bent portion 44). In this embodiment, the bent portion 44 of the sheet-shaped solar cell 11 is bent with a radius of curvature of about half the thickness of the solar cell panel 4.
[0081] To this end, it is preferable to provide a backup material 45 on the outer surface of the solar cell panel 4 (frame member 23) to guide the bending of the sheet-shaped solar cell 11. The backup material 45 is a member approximately the thickness of the panel frame 6 of the solar cell panel 4, and preferably does not have hard corners. The backup material 45 may be a member having a semicircular, circular, elliptical, or similar cross-sectional shape. The backup material 45 may be made of any material, such as rubber, resin, or metal. In particular, it is preferable that the backup material 45 be made of a relatively flexible and elastic material. This makes it possible for the backup material 45 to bend the sheet-shaped solar cell 11 without force, even if it has corners.
[0082] In particular, it is preferable to bend the excess portion 34 or protruding portion 43 of the sheet-shaped solar cell 11. By bending the excess portion 34 or protruding portion 43, the sheet-shaped solar cell 11 allows the internal junction box 41 to be easily installed on the back side of the solar cell panel 4 while suppressing deformation of the power generation area 33. Since there are no cells 35 in the excess portion 34 or protruding portion 43, it is also possible to bend them sharply, such as at a right angle or an acute angle. However, depending on the situation, the sheet-shaped solar cell 11 may include a part of the power generation area 33 in the bent portion 44.
[0083] (Regarding the connection of the sheet-shaped solar cell 11) For example, in Figure 2, the existing solar power generation facility 3 has solar panels 4 installed in rows 12. The existing solar power generation facility 3 may be modified by dividing the rows 12 of solar panels 4 into multiple areas, installing sheet-shaped solar cells 11 in each area, and separating the sheet-shaped solar cells 11 on both sides with a connecting plate 27. In this case, it is preferable to connect the sheet-shaped solar cells 11 as follows.
[0084] As shown in Figure 12, the sheet-shaped solar cells 11 may be arranged in parallel in each region with the internal junction boxes 41 facing each other in two rows 12. One row 12 may connect the adjacent positive and negative terminals of the internal junction box 41 of the adjacent sheet-shaped solar cell 11 in sequence (upper row 12). The other row 12 may connect the distant positive and negative terminals of the internal junction box 41 of the adjacent sheet-shaped solar cell 11 in sequence (lower row 12). The ends of the row 12 may connect the empty positive terminals of one row 12 to the empty negative terminals of the other row 12.
[0085] Here, the internal junction box 41 is the part to which external wiring 46 is connected in order to extract power from the sheet-shaped solar cell 11, and is installed on one of the short sides of the battery body 32. The internal junction box 41 may be covered from above with a connecting plate 27 installed in the gap between the panels 28, or it may be bent and installed on the back side of the existing solar cell panel 4.
[0086] The + terminal is for connecting the + side wiring 46 in the internal junction box 41. The - terminal is for connecting the - side wiring 46 in the internal junction box 41. The internal junction box 41 can be an integrated type that has both the + and - terminals, or a separate type that has the + and - terminals separately, and either type is acceptable.
[0087] The sheet-shaped solar cells 11 are arranged in two rows with the sides on which the internal junction boxes 41 are located facing each other, so that the internal junction boxes 41 face each other with the positive and negative sides reversed compared to the adjacent row 12.
[0088] Then, in one row 12 (the upper row 12 in the figure), adjacent positive and negative terminals in the internal junction box 41 of adjacent sheet-shaped solar cells 11 are connected in series sequentially with wiring member 46a. In the other row 12 (the lower row 12 in the figure), distant positive and negative terminals in the internal junction box 41 of adjacent sheet-shaped solar cells 11 are connected in series sequentially with wiring member 46b.
[0089] Then, at both ends of column 12, the + terminals and - terminals of one side of column 12 and the other side of column 12 are left empty. These empty + terminals and - terminals are connected in parallel using wiring members 46c and 46d, respectively. Connections between the + terminals and - terminals on the same side are made using an external connector or an external junction box 47. The wiring members 46c and 46d are then led from the external junction box 47 into the interior of building 1 via wiring 46.
[0090] The connections between the rows 12 of these sheet-like solar cells 11 may be made at the gaps between existing solar panels 4. This makes it possible and easy to hide the internal junction box 41, external junction box 47, wiring members 46a to 46d, wiring 46, etc., on the back of the connecting plate 27.
[0091] <Effect> The effect of this embodiment is as follows:
[0092] Solar power generation equipment 3 will be repaired in the event of a malfunction or when its functions need to be updated. However, if one of the solar panels 4 constituting solar power generation equipment 3 malfunctions, there is a risk that the entire solar power generation equipment 3 may need to be repaired.
[0093] If the entire solar power generation system 3 is to be renovated, it would involve removing all of the existing solar power generation system 3 and replacing it with a new one. However, renovating the entire system with the same silicon-based solar cells as the existing solar panels 4 is a large-scale and costly undertaking. Furthermore, if the solar power generation system 3 is installed on the roof 2, it would be necessary to renovate the structure of the roof 2 itself, as well as the mounting structure of the solar power generation system 3 to the roof 2. Concerns also arise regarding the waterproofing of the roof 2.
[0094] Therefore, in this embodiment, sheet-type solar cells 11 are used for the renovation of the solar power generation equipment 3. Furthermore, the existing solar power generation equipment 3 does not need to be removed. This simplifies the renovation of the solar power generation equipment 3 as follows.
[0095] <Effects> The effects of this embodiment are as follows:
[0096] (Effect 1) The renovation structure of the solar power generation equipment 3 involves installing sheet-shaped solar cells 11 on top of the existing solar power generation equipment 3, which uses silicon-based solar cell panels 4. By covering all of the solar cell panels 4 of the solar power generation equipment 3 with sheet-shaped solar cells 11, the solar power generation equipment 3 is completely renovated. Alternatively, by covering some of the solar cell panels 4 of the solar power generation equipment 3 with sheet-shaped solar cells 11, the solar power generation equipment 3 is partially renovated. This allows the solar power generation equipment 3 to be renovated quickly and relatively inexpensively without removing the existing solar cell panels 4. Furthermore, the problem of disposing of the existing solar cell panels 4 is avoided.
[0097] Moreover, since the sheet-shaped solar cell 11 has no fixed size, it can be easily manufactured to fit the size and shape of the existing solar power generation equipment 3. The sheet-shaped solar cell 11 can be easily manufactured in sizes ranging from small ones that cover individual solar panels 4 to large ones that cover all the solar panels 4 of the solar power generation equipment 3 at once, offering a high degree of flexibility in installation. Furthermore, because the sheet-shaped solar cell 11 is thin, flexible, and has flexibility in size, it fits neatly onto the existing solar power generation equipment 3, resulting in no waste. By overlapping the sheet-shaped solar cell 11 on top of the existing solar power generation equipment 3, it becomes a film that covers the surface of the existing solar power generation equipment 3, integrating it with the existing solar power generation equipment 3. The sheet-shaped solar cell 11 overlapped on top of the existing solar power generation equipment 3 results in a state that is completely different from stacking one solar panel 4 on top of another. Therefore, the sheet-shaped solar cell 11 can be installed inconspicuously from the outside, and the appearance can be installed in a way that is no different from the existing solar power generation equipment 3, resulting in a good appearance. Furthermore, since the sheet-shaped solar cells 11 can be structurally stacked in multiple layers, such as double or triple, on top of existing solar power generation equipment 3, modifications can be made repeatedly.
[0098] Furthermore, because the sheet-shaped solar cells 11 are lightweight, the weight increase due to installation is minimal, reducing the impact on the building 1 and roof 2. In addition, because the sheet-shaped solar cells 11 are waterproof, by installing them in layers, the waterproofing of the existing solar power generation equipment 3 and roof 2 can be ensured and improved. Therefore, when renovating the existing solar power generation equipment 3, it is not necessary to reinforce or repair the structure of the building 1 or roof 2.
[0099] The sheet-shaped solar cell 11 may be attached to the existing solar power generation equipment 3. This allows the sheet-shaped solar cell 11 to be easily and reliably installed on top of the existing solar power generation equipment 3.
[0100] (Effect 2) The sheet-shaped solar cell 11 may be hooked and fixed to the panel frame 6 of the existing solar power generation equipment 3 by hooking fittings 22 provided on the edge 21. This allows the sheet-shaped solar cell 11 to be easily, quickly, and reliably hooked and fixed to the existing solar panel 4 by overlapping it with the hooking fittings 22.
[0101] (Effect 3) The sheet-shaped solar cell 11 may be clamped and fixed to the panel frame 6 of the existing solar power generation equipment 3 by clamping fittings 25 at its edges 21. This allows the sheet-shaped solar cell 11 to be easily, quickly, and reliably installed on top of the existing solar panel 4 by clamping fittings 25. Furthermore, the clamping fittings 25 can be used even if there is no part to hook onto the existing solar panel 4, making them highly versatile.
[0102] (Effect 4) The sheet-shaped solar cell 11 may be installed across the solar panels 4 located on both sides of the connecting plate 27. This allows the connecting plate 27 and the large sheet-shaped solar cell 11 to efficiently cover multiple solar panels 4 of an existing solar power generation facility 3 that are spaced apart from each other, all at once. Furthermore, the number of sheet-shaped solar cells 11 to be installed can be reduced. In addition, the connecting plate 27 supports the sheet-shaped solar cell 11 from below in the gaps, preventing sagging, so the sheet-shaped solar cell 11 can be installed easily and aesthetically. Therefore, the connecting plate 27 improves work efficiency, reduces installation man-hours, and improves workability. Moreover, if the sheet-shaped solar cell 11 is installed on the connecting plate 27, the amount of power generated by the sheet-shaped solar cell 11 can be increased accordingly.
[0103] (Effect 5) The sheet-shaped solar cell 11 may be light-transmitting. This allows light transmitted through the sheet-shaped solar cell 11 to reach the existing solar power generation equipment 3, enabling the existing solar power generation equipment 3 to generate electricity. In other words, dual power generation is possible, using both the sheet-shaped solar cell 11 and the existing solar power generation equipment 3. Since the sheet-shaped solar cell 11 and the existing solar power generation equipment 3 have different wavelength ranges in which they are effective for power generation, they can generate electricity simultaneously with minimal interference from each other.
[0104] However, in the case of repairs due to a malfunction of the existing solar power generation equipment 3, some of the solar panels 4 of the existing solar power generation equipment 3 are deteriorated or damaged. Therefore, the existing solar power generation equipment 3 cannot generate electricity sufficiently, but it can still obtain electricity, so the amount of electricity generated can be greater than when only the sheet-type solar cells 11 are used. Thus, the remaining solar panels 4 are not wasted. In this case, preferably, the sheet-type solar cells 11 and the existing solar power generation equipment 3 are connected to separate electrical systems (or separate power conditioners are provided) to prevent the electricity from mixing and becoming unstable.
[0105] (Effect 6) The clamping fitting 25 may be adjustable in length and clamping width. This allows one clamping fitting 25 to be used with various solar panels 4 (photovoltaic power generation equipment 3) that have different side lengths and clamping widths x.
[0106] (Other effects) The sheet-shaped solar cell 11 allows for the arrangement of cells 35 along either the short side or the long side of the battery body 32. This enables the sheet-shaped solar cell 11 to arrange cells 35 while taking into account the effects of shading. In particular, it is preferable to arrange the cells 35 along the side that is closer to east-west orientation than the short side or long side of the battery body 32. As a result, the sheet-shaped solar cell 11 is less affected by shading, and an improvement in power generation efficiency can be expected.
[0107] Furthermore, the sheet-shaped solar cell 11 may be covered with a transparent protective layer 39 over its entire outer surface, including the front and back surfaces. This allows the transparent protective layer 39 to improve the weather resistance, waterproofing, and physical strength of the sheet-shaped solar cell 11.
[0108] Furthermore, the sheet-shaped solar cell 11 may be positioned so that the internal junction box 41 wraps around to the back side of the solar cell panel 4. This protects the internal junction box 41 from degradation due to ultraviolet rays. In this case, the sheet-shaped solar cell 11 may be guided by bending using a backup material 45. This allows the backup material 45 to maintain the proper bending shape of the sheet-shaped solar cell 11, preventing physical damage caused by excessive bending, and preventing the sealing of the sheet-shaped solar cell 11 from breaking and the internal wiring 42 from breaking.
[0109] Because sheet-shaped solar cells 11 have a high voltage, multiple sheet-shaped solar cells 11 are often connected in parallel. When connecting in parallel, if one row 12 of the sheet-shaped solar cells 11 is connected to the other row 12, the positive and negative ends of both ends of the row 12 will be left empty. Therefore, the positive ends and negative ends on opposite sides of the row 12 of the sheet-shaped solar cells 11 must be connected to each other, which increases the length of the wiring 46 and worsens the ease of installation.
[0110] Therefore, the other row 12 is configured to connect the separated positive and negative terminals in the internal junction box 41 of the adjacent sheet-shaped solar cell 11 in sequence, as described above. As a result, the positive terminals of both ends of row 12 are left empty, and the negative terminals of both ends are left empty. Therefore, the sheet-shaped solar cell 11 can connect the positive terminals of both ends and the negative terminals of both ends on the same side, shortening the wiring 46 and improving ease of installation.
[0111] Furthermore, the present invention is not limited to the above-described embodiments, and modifications are permitted without departing from the spirit of the present invention. The existing solar power generation equipment 3 is not limited to those using silicon-based solar cell panels 4. In addition, the above-described modification structure for the solar power generation equipment 3 is applicable not only to existing solar power generation equipment 3 installed on the roof 2 of a building 1, but also to existing solar power generation equipment 3 installed on the ground or elsewhere. The present invention also includes modifications in which a translucent sheet-like solar cell 11 is installed on top of a new or existing, normally functioning solar power generation equipment 3 for the purpose of updating (or improving) its function. This makes it possible to use the two power generation equipment simultaneously and generate electricity efficiently. [Explanation of Symbols]
[0112] 3. Solar power generation equipment 4. Solar panels 6 Panel Frame 11 Sheet-type solar cells 21 Edge 22 Hook fittings 25 Clamping hardware 27 Watari
Claims
1. A renovation structure for solar power generation equipment characterized by the installation of sheet-like solar cells on top of existing solar power generation equipment.
2. A modification structure for a solar power generation facility according to claim 1, A renovation structure for a solar power generation facility, characterized in that the sheet-shaped solar cell is hooked and fixed to the panel frame of the existing solar power generation facility by hooking fittings provided on its edges.
3. A modification structure for a solar power generation facility according to claim 1, A renovation structure for a solar power generation facility, characterized in that the sheet-shaped solar cell is clamped and fixed to the panel frame of the existing solar power generation facility by clamping fittings at its edges.
4. A modification structure for a solar power generation facility according to any one of claims 1 to 3, The existing solar power generation facility has multiple solar panels spaced apart from each other. A connecting plate is installed between multiple solar panels. A refurbished structure for a solar power generation facility, characterized in that the sheet-shaped solar cells are installed across the solar panels on both sides of the connecting plate.
5. A modification structure for a solar power generation facility according to any one of claims 1 to 3, A renovation structure for a photovoltaic power generation facility, characterized in that the sheet-shaped solar cell has light-transmitting properties.
6. A modification structure for a solar power generation facility according to claim 3, The aforementioned clamping fitting is characterized in that at least one of its length and clamping width is adjustable, making it a modification structure for solar power generation equipment.