GB2591122A - A solar energy harvesting device - Google Patents

A solar energy harvesting device Download PDF

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Publication number
GB2591122A
GB2591122A GB2000680.5A GB202000680A GB2591122A GB 2591122 A GB2591122 A GB 2591122A GB 202000680 A GB202000680 A GB 202000680A GB 2591122 A GB2591122 A GB 2591122A
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United Kingdom
Prior art keywords
solar energy
energy harvesting
harvesting device
base unit
segments
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Granted
Application number
GB2000680.5A
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GB2591122B (en
GB202000680D0 (en
Inventor
Hancock Adam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tools Volts Ltd
Tools Volts Ltd
Original Assignee
Tools Volts Ltd
Tools Volts Ltd
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Publication date
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Priority to GB2000680.5A priority Critical patent/GB2591122B/en
Publication of GB202000680D0 publication Critical patent/GB202000680D0/en
Publication of GB2591122A publication Critical patent/GB2591122A/en
Application granted granted Critical
Publication of GB2591122B publication Critical patent/GB2591122B/en
Active legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
    • H01L31/036—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes
    • H01L31/0392—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including thin films deposited on metallic or insulating substrates ; characterised by specific substrate materials or substrate features or by the presence of intermediate layers, e.g. barrier layers, on the substrate
    • H01L31/03926—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including thin films deposited on metallic or insulating substrates ; characterised by specific substrate materials or substrate features or by the presence of intermediate layers, e.g. barrier layers, on the substrate comprising a flexible substrate
    • H01L31/03928—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including thin films deposited on metallic or insulating substrates ; characterised by specific substrate materials or substrate features or by the presence of intermediate layers, e.g. barrier layers, on the substrate comprising a flexible substrate including AIBIIICVI compound, e.g. CIS, CIGS deposited on metal or polymer foils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/10—Supporting structures directly fixed to the ground
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/541—CuInSe2 material PV cells

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Photovoltaic Devices (AREA)

Abstract

A solar energy harvesting device comprising: a base unit with top and bottom surfaces; a frame connected and extending upwards from the base unit; photovoltaic/solar cells 26 attached to the frame, at least some in a convexly arcuate manner. The frame may comprise at least one column, with at least one column comprising at least one telescopic segment 20, 22, 24. The column may comprise three segments, at least two supporting PV cells covering at least three-quarters of their surface. A display, light, antenna, transmitter or camera may be mounted on a segment. A canopy, battery, electrical outlet and/or force sensors may be included. The frame may comprise an internal hollow section that a door allows access to. The PV cells may comprise copper indium gallium selenide (CIGS).

Description

A Solar Energy Harvesting Device
Field of the Invention
The invention relates to a solar energy harvesting device, that may be suitable for the collection, storage and/or use of solar energy.
Backaround to the Invention
Present energy harvesting systems generally comprise a flat array of photovoltaic cells that are roughly aligned to the prominent direction of the sunlight. Whilst these systems may be useful for harvesting sunlight during part of the day, for much of the day, they are inefficient because the sunlight is at an oblique angle to the array of cells, rather than being focussed thereupon from a direction perpendicular. Additionally, a large footprint is required to accommodate such devices and the footprint to solar array surface area is often every small, thus making such devices inefficient in respect of the space that they occupy.
For example, portable lighting units that employ solar cells generally comprise a flat photovoltaic array connected to a base unit and the flat array either requires adjustment to keep it aligned with the sunlight, or it is set to a position that is considered to be the most efficient. The former option requires complex tracking and rotating equipment, which may be prone to failure, and the latter option results in an inefficient solar harvesting system because the solar cells are rarely properly aligned to the sunlight.
Summary of the Invention
Accordingly, the present invention is directed to a solar energy harvesting device comprising: a base unit having a top surface and a bottom surface; a frame connected to the base and extending upwardly therefrom and photovoltaic cells attached to the framework; wherein at least some of the photovoltaic cells are arranged in a convexly arcuate manner. The use of a convexly arcuate arrange of photovoltaic cells ensures a large surface area for harvesting solar energy, that is always aligned to efficiently harvest solar energy because there is always a face of the photovoltaic, or solar, cells that is perpendicular to the sunlight. This arrangement ensures that the solar harvesting device is always able to readily and efficiently harvest solar energy, without the need to accurately align the device when it is deployed. Such an arrangement is particularly useful for locations that require a temporary power supply, such as a construction site or an event. Thus, the device may be portable and can be readily deployed for use and moved away when no longer required.
Advantageously, the frame comprises at least one column extending from the base unit, the at least one column comprising at least one telescopic segment that extends therefrom.
Employing a telescopic frame to which the photovoltaic cells are connected allows a larger solar collecting surface area for the footprint of the device. The photovoltaic cells may be directly mounted upon the frame, or they may be mounted upon an intermediate element that is connected to the frame.
It is preferable that the column comprises at least three segments, and, preferably, at least two of the segments are provided with photovoltaic cells mounted thereupon. This allows for the third segment to either have an item mounted thereupon or to provide a protection sleeve to give protection to the photovoltaic cells during transport.
In such an arrangement it is particularly advantageous that least one of the telescopic segments has at least one item mounted thereupon, the item being selected from a group comprising: a display; lighting; a wireless network antenna; a transmitter; and a camera.
Thus, an item that might require height to operate effectively is combined with an energy harvesting section to power that item. For example, a screen, such as a flexible LED screen, at an event might be positioned on one of the telescopic segments to elevate the screen, which allows the energy required to power that screen to be harvested on the other telescopic segments. Similarly, an antenna, transmitter or camera will operate more effectively from the raised position This may further be advantageous on construction sites for providing cameras and/or lighting to assist with health and safety requirements.
Preferably, the photovoltaic cells cover at least two-thirds of the exposed external surface area of the at least two segments, and, more preferably, the photovoltaic cells cover at least three-quarters of the exposed external surface area of the at least two segments. In a situation where the photovoltaic cells cover all of the exposed surface area, the maximum amount of solar energy can be harvested. Therefore, the more of the exposed surface area that is provided with photovoltaic cells, the better, particularly when thin-film solar cells, particularly copper indium gallium selenide solar cells, or "CIGS" cells, are employed as the photovoltaic cells. One particular advantage of copper indium gallium selenide solar cells is that they are able to harness reflected light. Therefore, by using the device of the present invention, energy can be harnessed around the whole of the frame, not just the surface receiving direct light. Thus, the device is especially beneficial in lower light conditions, such as when used in the Winter months and solar irradiance is relatively low.
Therefore, where the majority of the exposed surface of the telescopic segments is provided with thin film, convexly arcuate, photovoltaic cells, the device is able to provide improved solar energy harvesting over existing devices, because cells around the whole device are able to generate electricity. Where cells are arranged around the whole 360 degrees of the frame, the device is particularly efficient at generating energy.
In one arrangement, a canopy section is provided at a position at or above the top surface of the base unit and the canopy may be mounted upon a, or the, a telescopic segment of the column. It is preferable that the canopy is provided with at least one retractable and/or extendable part to reduce or increase its area. A canopy may be provided on the device to protect the base unit and/or to provide shelter to people adjacent the device. This can be used to provide shelter from rain or sunshine, depending upon the environment. Additionally, the canopy may be mounted upon the base unit, if it is sufficiently tall, or it may be provided on one or more of the telescopic segments to allow it to be height adjustable. Furthermore, the canopy may be extendable so that it can be retracted for storage and transport and then extended for use. It may be that the canopy, or part thereof, is detachable from the device.
It is envisaged that the base unit may be provided with at least one battery to receive energy generated by the photovoltaic cells. This battery may be static, which is to say that can be employed to store the solar energy for use from the base unit later on, or it may be removable so that the energy can be relocated and used elsewhere. For example, a plurality of batteries may be provided and at least one of the batteries is readily removable from the base unit. This allows a battery to be charged from the system and removed therefrom to be used in another device, whilst other battery or batteries remain on charge. Additionally, or alternatively, the device may be connected to a power grid to provide power to a central power network.
Advantageously, the base unit is provided with at least one electrical outlet, which may be in the form of a socket, a universal serial bus ("USB-), a charger for mobile telephones, a car charger and/or other devices. Multiple connections may be provided, which may be powered directly from the photovoltaic cells or via a storage element in the base unit.
Particularly in view of the potential height provided by the telescopic segments, it is especially advantageous that the framework is provided with sensors to monitor forces acting thereupon. These sensors may be in the form of wind speed and/or directional sensors, accelerometers, tilt sensors and other devices for measuring particular parameters. The sensors can be attached directly to one or more of the telescopic segments, where present. Thus, if the adverse weather is detected, the base unit can be triggered to lower the telescopic segment(s) to a safe height and/or retract the canopy, if present. To that end, a central processing unit may be provided to control the energy storage and distribution and to control the features of the device, for example, any telescopic segments in the frame.
In one embodiment, the base unit or the frame comprises an internal hollow section and a door allowing access thereto. Thus, the device may have an internal section for the storage of parts and/or it may be suitable to receive at least one person, thereby providing shelter and private space.
Although the frame can be any shape, it is preferable that an axial cross-section of the frame, and more specifically, the cross-section of the photovoltaic layer, is circular or oval. This can assist with reducing the resistance to any wind by making the device more able to deflect the wind. Furthermore, when a non-circular cross-section is employed, the frame may be rotatable to position any leading edge towards the direction of the oncoming wind. An additional benefit of the circular, or arcuate, design with solar cells connected about the whole circumference is that the device is always directed towards the sunlight and does not require exact positioning, as is the case with many existing devices.
The base unit may be provided with a counterbalance therein, or thereon, to provide more stability to the device, particularly when the telescopic segments are in a raised position.
The diameter of the external surface of the convex solar cells may be between several centimetres up to ten metres or larger for particular embodiments.
The base unit may be provided with other energy using features, such as cooking facilities, heating elements and/or a water purifying system, thereby allowing the energy harvested to be employed at the location of the device. This may be particularly advantageous in geographically remote areas or for disaster relief Furthermore, the base unit may comprise a flat base that can be provided with seating. This has the advantage of creating a larger base section, thereby giving more stability to the device, particularly the embodiment incorporating telescopic segments, and, particularly when used in combination with the canopy, provides a comfortable area for users to sit.
Brief Description of the Drawings
Embodiments of the invention will now be described, by way of example only, and with reference to the accompanying drawings, in which: Figure 1 shows a perspective view of a device in a first position in accordance with a first embodiment of the present invention; Figure 2 shows a top view of the device of Figure I; Figure 3 shows a perspective view of the device of Figure 1 in a second position; Figure 4 shows a device according to a second embodiment of the present invention; Figure 5 shows a second view of the device of Figure 4; and Figure 6 shows a top view of the device of Figure 4; and Figure 7 shows a further top view of the device of Figure 4.
Detailed Description of Exemplary Embodiments
Figures 1 to 3 show a solar energy harvesting device 10 comprising a base unit 12 and a frame 14.
The base unit 12 is provided with a solid foot 16 to give a firm base to support the device, although it will be appreciated that it could be provided with wheels to allow a more portable arrangement. A control section 18 is provided on the foot 16 in which any processing unit(s) or energy storage elements can be contained, along with any outlets.
The frame 14 comprises a first telescopic segment 20, a second telescopic segment 22 and a third telescopic segment 24, all of which are tubular and have a circular cross-section.
When in the raised position, as shown in Figure 3, the majority of the exposed surface area of the respective telescopic segments 20, 22, 24 is provided with thin-film solar cells, in the form of copper indium gallium selenide solar cells 26. Due to the shape of the telescopic segments 20, 22, 24, the solar cells 26 attached thereto are arranged so that their external face is convexly arcuate, or convexly curved. The external surface of the frame 14 is also provided with guide surfaces 28 arranged longitudinally along the frame, and rollers 30 are provided to contact those guide surfaces 28, in order to enable the telescopic segments 20, 22, 24 to be reliably raised and lowered. A gap is arranged between respective telescopic segments 20, 22, 24 to avoid contact between the internal surface of one segment and the solar cells 26 of another segment, thereby allowing the respective movement of the segments without damaging the solar cells 26 due to contact between the parts.
The telescopic segments 20,22, 24 are controlled by a winch unit (not shown) that is able to raise and lower the segments 20, 22, 24. This allows an arrangement in which two-third of the segments 20, 22, 24 are able to protrude, with the remaining third of the segments 22, 24 above the first segment 20 being retained within the previous segment, although it will be appreciated that the ratios may be adjusted to suit the application.
In the embodiment shown in Figures 4 to 7, there is provided a base unit 12 with a frame 14 extending therefrom. The frame 14 is provided with a hollow central section 50 and a door 52 is connected therein to provide access to the hollow central section 50. The frame 14 is in the form of a substantially U-shaped section that provides a convexly arcuate surface to which solar cells 54 are attached. Whilst the door 52 may be provided with solar cells thereupon, it is envisaged that it may be preferable to face the door away from the predominant direction of the sun, which will also expose the largest surface area of the device to the sunlight. A roof (not shown) may be provided on top of the frame and the hollow section 50 may be provided with an electrical outlet to use the energy generated by the device.
It is envisaged that more than one frame may extend from a single base unit, thereby providing potential to increase the solar-collecting surface area relative to the footprint of the device. Additionally, arms may extend from the frame elements or telescopic segments to further increase the surface area.
Elements of each embodiment may be incorporated into other elements, for example, batteries discussed in relation to one embodiment, may be applied to other embodiments disclosed herein.

Claims (1)

  1. Claims 2. 3. 5. 6. 7.A solar energy harvesting device comprising a base unit having a top surface and a bottom surface; a frame connected to the base and extending upwardly therefrom and photovoltaic cells attached to the framework; wherein at least some of the photovoltaic cells are arranged in a convexly arcuate manner.A solar energy harvesting device according to claim 1, wherein the frame comprises at least one column extending from the base unit, the at least one column comprising at least one telescopic segment that extends therefrom.A solar energy harvesting device according to claim 2, wherein the column comprises at least three segments.A solar energy harvesting device according to claim 3, wherein at least two of the segments which are provided with photovoltaic cells mounted thereupon A solar energy harvesting device according to claim 4, wherein the photovoltaic cells cover at least two-thirds of the exposed external surface area of the at least two segments.A solar energy harvesting device according to claim 5, wherein the photovoltaic cells cover at least three-quarters of the exposed external surface area of the at least two segments.A solar energy harvesting device according to any one of claims 2 to 6, wherein at least one of the telescopic segments has at least one item mounted thereupon, the item being selected from a group comprising: a display; lighting; a wireless network antenna; a transmitter; and a camera A solar energy harvesting device according to any preceding claim, wherein a canopy section is provided at a position at or above the top surface of the base unit 9. A solar energy harvesting device according to claim 8, wherein the canopy is mounted upon a, or the, a telescopic segment of the column 10. A solar energy harvesting device according to claim 8 or claim 9, wherein the canopy comprises at least one retractable and/or extendable part to reduce or increase its area A solar energy harvesting device according to any preceding claim, wherein the base unit is provided with at least one battery to receive energy generated by the photovoltaic cells.12. A solar energy harvesting device according to claim 11, wherein a plurality of batteries is provided and at least one of the batteries is readily removable from the base unit 13. A solar energy harvesting device according to any preceding claim, wherein the base unit is provided with at least one electrical outlet.14. A solar energy harvesting device according to any preceding claim, wherein the framework is provided with sensors to monitor forces acting thereupon 15. A solar energy harvesting device according to claim 15, wherein the sensors are connected to a, or the, telescopic column 16. A solar energy harvesting device according to claim 1, wherein the frame comprises an internal hollow section and a door allowing access thereto.
GB2000680.5A 2020-01-16 2020-01-16 A solar energy harvesting device Active GB2591122B (en)

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GB2591122A true GB2591122A (en) 2021-07-21
GB2591122B GB2591122B (en) 2022-07-13

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180172229A1 (en) * 2016-12-20 2018-06-21 Wind Tower Technologies, Llc Solar array in a wireless tower
CN207831229U (en) * 2018-01-26 2018-09-07 河南兆丰新能源科技有限公司 Automatic charging type lighting standard
CN209960374U (en) * 2019-07-26 2020-01-17 石城县莱霆照明有限公司 Street lamp with flexible solar panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180172229A1 (en) * 2016-12-20 2018-06-21 Wind Tower Technologies, Llc Solar array in a wireless tower
CN207831229U (en) * 2018-01-26 2018-09-07 河南兆丰新能源科技有限公司 Automatic charging type lighting standard
CN209960374U (en) * 2019-07-26 2020-01-17 石城县莱霆照明有限公司 Street lamp with flexible solar panel

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Publication number Publication date
GB2591122B (en) 2022-07-13
GB202000680D0 (en) 2020-03-04

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