Solar power generation system

Abstract

We provide a solar power generation system that can effectively utilize the electricity generated by solar-powered roller screens. [Solution] The solar power generation system 10 comprises a plurality of solar cell roller screens 12, a plurality of power transmission and reception devices 24 arranged for each of the plurality of solar cell roller screens 12 and transmitting and receiving power generated by the solar cell roller screens 12, and a power storage device 30 that receives power from the plurality of power transmission and reception devices 24 connected in parallel.

Description

Technical Field

[0001] The present disclosure relates to a photovoltaic power generation system.

Background Art

[0002] Conventionally, a solar cell roll screen having solar cell cells provided on a screen portion and a solar cell glass having solar cell cells provided on a glass panel are known (see, for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] It is desirable to effectively utilize the electric power generated by the solar cell roll screen or solar cell glass as described above.

[0005] The present disclosure has been made in view of such problems, and an object thereof is to provide a photovoltaic power generation system capable of effectively utilizing the electric power generated by a solar cell roll screen or solar cell glass.

Means for Solving the Problems

[0006] In order to solve the above problems, a photovoltaic power generation system according to an aspect of the present disclosure includes a plurality of solar cell roll screens and / or solar cell glasses, a plurality of power transmission and reception devices arranged for each of the plurality of solar cell roll screens and / or solar cell glasses and transmitting and receiving the electric power generated by the solar cell roll screen device and / or solar cell glass, and a load device that receives the electric power from the plurality of power transmission and reception devices connected in parallel. [Brief explanation of the drawing]

[0007] [Figure 1] This is a schematic diagram illustrating a photovoltaic power generation system according to an embodiment. [Figure 2] This is a schematic cross-sectional view of a solar cell roller screen. [Figure 3] This is a schematic diagram illustrating a solar power generation system according to another embodiment. [Figure 4] This is a schematic cross-sectional view of a solar cell glass. [Modes for carrying out the invention]

[0008] The present disclosure will be described below with reference to the drawings, based on preferred embodiments. The following configurations are illustrative for the purpose of understanding the present disclosure, and the scope of the present disclosure is determined solely by the attached claims. Identical or equivalent components and members shown in each drawing are denoted by the same reference numerals, and redundant descriptions are omitted where appropriate. In addition, the dimensions of members in each drawing are shown enlarged or reduced as appropriate for ease of understanding. Furthermore, some members that are not important for describing the embodiments are omitted in each drawing.

[0009] Figure 1 is a schematic diagram illustrating a photovoltaic power generation system 10 according to an embodiment. As shown in Figure 1, the photovoltaic power generation system 10 comprises a plurality (in this case, four) of solar cell roller screens 12. The four solar cell roller screens 12 are installed side by side in the building opening. A pericover 20 is positioned below the solar cell roller screens 12. A power receiving coil 22 is positioned on or near the top surface of the pericover 20.

[0010] Figure 2 is a schematic cross-sectional view of the solar cell roll screen 12. The solar cell roll screen 12 comprises a screen section 11 and a holding section 13 that suspends and holds the screen section 11.

[0011] The holding unit 13 includes a winding drum 14 for winding up the screen unit 11. A tubular motor (not shown) for rotating the winding drum 14 is located inside the winding drum 14. The screen unit 11 can be raised and lowered by driving the tubular motor.

[0012] The screen section 11 is configured as a rectangular sheet-like body that can be rolled up. The upper end of the screen section 11 in the longitudinal direction is connected to the winding drum 14, and a bottom rail 15 is provided at the lower end. The bottom rail 15 applies force in a direction that pulls the screen section 11 downward and also applies tension to the screen section 11 to improve its flatness.

[0013] The screen section 11 comprises a fabric layer and a plurality of solar cells 16 provided on the fabric layer. The fabric layer may be made of fibers or plastics (synthetic resins) such as PVC (polyvinyl chloride), polypropylene, polyethylene, or polyester. In another embodiment, the screen section 11 may not have a fabric layer and may be a skeleton type made of, for example, an ETFE film.

[0014] The solar cell 16 may be square in plan view and may be arranged in a matrix. However, the size, shape, and arrangement method of the solar cell 16 are not particularly limited, and any size, shape, and arrangement are possible. For example, multiple rectangular solar cells in plan view may be arranged in the vertical direction of the screen portion 11. In general, matrix arrangement is frequently used in crystalline silicon solar cells. In another embodiment, the entire surface of the light-receiving surface may be coated or printed with perovskite or the like. The solar cell 16 is configured to convert light energy into electricity by utilizing the photovoltaic effect.

[0015] The lower end of the screen part 11 is recessed only into the bottom rail 15. A lead wire 18 for extracting the power generated by the solar cell 16 is drawn out from the lower end of the screen part 11. Inside the bottom rail 15, the lead wire is connected to the control board 19.

[0016] The bottom rail 15 may be a hollow rod-shaped body. The outer cross-section perpendicular to the longitudinal direction of the bottom rail 15 may be rectangular or circular. The hollow rod-shaped body may be constituted by combining members divided into two or more parts, for example, by fitting.

[0017] Inside the bottom rail 15, a control board 19 for controlling the power generated by the solar cell 16 may be accommodated.

[0018] The control board 19 may include an MPPT (Maximum Power Point Tracking) control board, a power supply (power extraction) control board (a user interface board for power supply via a USB-C or a DC jack, etc.), and a power supply board. These control boards control the power input via the lead wire 18.

[0019] The MPPT control board is a control board for following the maximum operating point during power generation in real time according to changes in weather conditions. The power supply (power extraction) control board is a control board for controlling the power supply (extraction) of the power generated by the solar cell 16. The power supply board is a board for controlling the supply of power to the outside via a power transmission coil.

[0020] Inside the bottom rail 15, a power transmission coil 21 for outputting the power generated by the solar cell 16 to a power reception coil 22 arranged on the pericaver 20 is provided. The power transmission coil 21 is arranged to face the power reception coil 22, so that power can be supplied non-contact between the power transmission coil 21 and the power reception coil 22. The non-contact power transmission method may be an electromagnetic induction method, a magnetic field resonance method, or a microwave wireless method.

[0021] In the embodiment shown in FIG. 2, since the power receiving coil 22 is provided on the pericaver 20 located below the bottom rail 15, the power transmitting coil 21 is provided so as to face the bottom surface of the bottom rail 15. However, the position and orientation of the power transmitting coil 28 may be appropriately set according to the arrangement position of the power receiving coil 22. The bottom rail 15 is configured to be able to transmit electromagnetic waves so that power can be transmitted to the power receiving coil 22.

[0022] When the screen portion 11 is lowered and the bottom rail 15 approaches the upper surface of the pericaver 20, the power generated by the solar cell 16 is transmitted from the power transmitting coil 21 to the power receiving coil 22. On the other hand, when the screen portion 11 is wound up and the bottom rail 15 moves away from the upper surface of the pericaver 20, the power transmission from the power transmitting coil 21 to the power receiving coil 22 is stopped. The power transmitting coil 21 and the power receiving coil 22 constitute a power transmission and reception device 24 that transmits and receives the power generated by the solar cell roll screen 12.

[0023] Returning to FIG. 1. A power transmission and reception device 24 composed of a power transmitting coil 21 and a power receiving coil 22 is arranged for each of the four solar cell roll screens 12. The four power receiving coils 22 are connected in parallel by a cable 26. The cable 26 is connected to a power storage device 30. The power storage device 30 is configured to be able to store the power supplied from the cable 26. The power storage device 30 is an example of a load device that receives power from a plurality of power transmission and reception devices 24 connected in parallel. The load device may be, for example, a lighting device, an air conditioning fan, and other similar electrical products.

[0024] According to the solar power generation system 10 according to the present embodiment, when the screen portion 11 of the solar cell roll screen 12 is lowered and the bottom rail 15 is close to the upper surface of the pericaver 20, the power generated by the solar cell roll screen 12 is supplied to the power storage device 30 via the power transmission and reception device 24 and the cable 26 and stored. Since the power generated by the plurality of solar cell roll screens 12 can be collectively stored in the power storage device 30, the generated power can be effectively utilized.

[0025] When solar cells are movable, such as in the solar cell roll screen 12, routing the wiring becomes difficult, making it difficult to extract the power generated by the solar cells to the outside. As in the solar power generation system 10 according to this embodiment, by using a power transmission and receiving device 24 consisting of a power transmission coil 21 provided on the bottom rail 15 of the solar cell roll screen 12 and a power receiving coil 22 arranged on the pericover 20, troublesome wiring is eliminated, and the power generated by the solar cells 16 can be easily extracted to the outside.

[0026] In the above embodiment, the power receiving coil 22 was provided on the pericover 20, but the member on which the power receiving coil 22 is provided is not particularly limited, as long as it is a member located near the solar cell roll screen 12 and is capable of receiving power from the power transmission coil 21 of the bottom rail 15.

[0027] In the above embodiment, a power transmission coil 21 and a power reception coil 22 were used as the power transmission and reception device 24. However, instead of these, a magnetic power transmission terminal provided on the bottom rail 15 of the solar cell roll screen 12 and a magnetic power reception terminal arranged on the pericover 20 may be used. A magnetic terminal is a connector that connects using magnetic force. Magnetic terminals are suitable for use as the power transmission and reception device 24 of the solar cell roll screen 12 because they easily disconnect when the screen section 11 is rolled up and automatically reconnect by magnetic force when the screen section 11 is lowered.

[0028] Figure 3 is a schematic diagram illustrating a photovoltaic power generation system 40 according to another embodiment. As shown in Figure 3, the photovoltaic power generation system 40 comprises a plurality (in this case, two) of solar cell glass 42. The two solar cell glass 42 are each slidable in the left-right direction, forming a sliding window.

[0029] A frame 50 for attaching the glass to the building is provided around the two solar cell panes 42. The frame 50 consists of upper and lower transoms 51, 52 and left and right mullions 53, 54. A power receiving coil 22 is positioned in the lower transom 52.

[0030] Figure 4 is a schematic cross-sectional view of the solar cell glass 42. The solar cell glass 42 comprises a pair of glass panels 43, 44, a plurality of solar cells 16 arranged between the pair of glass panels 43, 44, and a frame 45 surrounding the pair of glass panels 43, 44. The solar cells 16 may be square in plan view and may be arranged in a matrix. However, the size, shape, and arrangement method of the solar cells 16 are not particularly limited, and any size, shape, and arrangement are possible.

[0031] The frame 45 may be made of an aluminum alloy, a resin material such as PVC, or wood. The lower frame 45a of the frame 45 is hollow and contains a control board 19 for controlling the power generated by the solar cell 16 and a transmission coil 21 for outputting the power generated by the solar cell 16 to a receiving coil 22 located in the lower transom 52. The lower transom 52 may be configured to allow electromagnetic waves to pass through, or it may be exposed, in order to enable power transmission to the receiving coil 22.

[0032] When the solar cell glass 42 is closed and the transmitting coil 21 and the receiving coil 22 are brought close together, the power generated by the solar cell 16 is transmitted from the transmitting coil 21 to the receiving coil 22. On the other hand, when the solar cell glass 42 is opened and the transmitting coil 21 and the receiving coil 22 are separated, the transmission of power from the transmitting coil 21 to the receiving coil 22 stops. The transmitting coil 21 and the receiving coil 22 constitute a power transmission and reception device 24 that transmits and receives power generated by the solar cell roller screen 12.

[0033] Returning to Figure 3, a power transmission and receiving device 24, consisting of a power transmission coil 21 and a power receiving coil 22, is positioned for each of the four solar cell glass 42. The two power receiving coils 22 are connected in parallel by a cable 26. The cable 26 is connected to a power storage device 30. The power storage device 30 is configured to store the power supplied from the cable 26.

[0034] According to the photovoltaic power generation system 40 of this embodiment, when the solar cell glass 42 is closed and the power transmission coil 21 is close to the power receiving coil 22, the power generated by the solar cell glass 42 is supplied to the energy storage device 30 via the power transmission / reception device 24 and the cable 26 and stored. Since the power generated by multiple solar cell glass 42s can be stored together in the energy storage device 30, the generated power can be used effectively. In addition, if multiple power receiving coils 22 are provided within the transom 52, the generated power can be extracted even when the solar cell glass 42 is open.

[0035] When solar cells are movable, such as in the solar cell glass 42, routing the wiring becomes difficult, making it difficult to extract the power generated by the solar cells to the outside. As in the photovoltaic power generation system 40 according to this embodiment, by using a power transmission and receiving device 24 consisting of a power transmission coil 21 provided on the lower frame 45a of the solar cell glass 42 and a power receiving coil 22 arranged on the transom 52 below, troublesome wiring is eliminated, and the power generated by the solar cells 16 can be easily extracted to the outside.

[0036] In the above-described embodiment, the power receiving coil 22 was provided on the lower transom 52, but the member on which the power receiving coil 22 is provided is not particularly limited, as long as it is a member located near the solar cell glass 42 and capable of receiving power from the power transmission coil 21 of the lower frame 45a.

[0037] In the above embodiment, a power transmission coil 21 and a power reception coil 22 were used as the power transmission and reception device 24. However, instead of these, a magnetic power transmission terminal provided on the lower frame 45a of the solar cell glass 42 and a magnetic power reception terminal placed on the transom 52 may be used. Magnetic terminals are suitable for use as the power transmission and reception device 24 of the solar cell glass 42 because they can be easily disconnected when the solar cell glass 42 is slid open and automatically connected by magnetic force when the solar cell glass 42 is slid closed.

[0038] In the embodiments described above, sliding windows were used as an example, but the technology of this disclosure can also be applied to other types of windows, such as projecting windows, outward-opening windows, casement windows, tilt-and-turn windows, vertical-axis rotating windows, and horizontal-axis rotating windows.

[0039] Figure 1 shows a photovoltaic power generation system 10 using a solar cell roll screen 12, and Figure 3 shows a photovoltaic power generation system 40 using solar cell glass 42. However, a photovoltaic power generation system may be constructed using both the solar cell roll screen 12 and the solar cell glass 42.

[0040] The present invention has been described above based on embodiments. These embodiments are illustrative, and it will be understood by those skilled in the art that various modifications and changes are possible within the scope of the claims of the present invention, and that such modifications and changes are also within the scope of the claims of the present invention. Accordingly, the descriptions and drawings herein should be treated as illustrative rather than limiting. [Explanation of Symbols]

[0041] 10, 40 Solar power generation system, 11 Screen section, 12 Solar cell roll screen, 14 Winding drum, 15 Bottom rail, 16 Solar cell, 20 Pericover, 21 Transmission coil, 22 Receiving coil, 24 Transmission and receiving device, 26 Cable, 30 Energy storage device, 42 Solar cell glass, 50 Frame, 52 Mullion.

Claims

1. Multiple solar cell roller screens and / or solar cell glass, A plurality of power transmission and reception devices are arranged for each of the plurality of solar cell roller screens and / or solar cell glass, and transmit and receive the power generated by the solar cell roller screens and / or solar cell glass, A load device that receives power from the plurality of power transmission and reception devices connected in parallel, A solar power generation system equipped with [specific features / features].

2. The aforementioned power transmission and receiving device is A power transmission coil provided on the bottom frame and / or the frame of the solar cell glass of the solar cell roller screen, A power receiving coil provided in a member located near the solar cell roller screen and / or the solar cell glass, The photovoltaic power generation system according to claim 1, including the above.

3. The aforementioned power transmission and receiving device is A magnetic power transmission terminal provided on the bottom frame and / or the frame of the solar cell glass of the solar cell roller screen, A magnetic power receiving terminal provided on the member located near the solar cell roller screen and / or the solar cell glass, The photovoltaic power generation system according to claim 1, including the above.

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