CN217643237U - Folded cascade photovoltaic power generation subassembly - Google Patents
Folded cascade photovoltaic power generation subassembly Download PDFInfo
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- CN217643237U CN217643237U CN202221162379.2U CN202221162379U CN217643237U CN 217643237 U CN217643237 U CN 217643237U CN 202221162379 U CN202221162379 U CN 202221162379U CN 217643237 U CN217643237 U CN 217643237U
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- 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
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Abstract
The utility model provides a folded cascade photovoltaic power generation subassembly. The photovoltaic power generation assembly comprises two parallel sliding guide rails and a plurality of photovoltaic power generation plates arranged between the two sliding guide rails, wherein a limiting plate is arranged at one end of each of the two sliding guide rails; the bilateral symmetry of every photovoltaic power generation board is equipped with the slider, and photovoltaic power generation board rotates with the slider of both sides through slewing mechanism and links to each other to through the sliding guide sliding connection of slider and corresponding side, two adjacent photovoltaic power generation boards pass through the telescopic link with the slider of one side and connect, and be connected with the limiting plate. The utility model discloses the collection is flexible and upset into an organic whole for can control angle regulation when photovoltaic power generation board expandes, can effectively stretch out and draw back when packing up in order to guarantee structural stability, and the upset is reasonable, and photovoltaic power generation board is not fragile, can be applicable to and use under the different weather different times, and the security is high.
Description
Technical Field
The utility model relates to a photovoltaic power generation technical field especially relates to a folded cascade photovoltaic power generation subassembly.
Background
A photovoltaic cell panel, also called a solar cell panel, is an assembly of a plurality of solar cell modules assembled on a plate in a certain manner, and is usually used as a unit of a photovoltaic matrix. The solar energy power supply can be used for civil and military life in remote areas without electricity, such as plateaus, islands, pastoral areas, frontier sentries and the like, and can also be used as a solar energy power supply for residents.
However, under the bad weather such as strong wind outside, sand and wind, solar cell panel's life is very low, but angle regulation and folding performance are relatively poor, can not fine suitable topography and weather adjust, so folding and the control of upset are very important to photovoltaic power generation board, for example chinese patent utility model CN216290816U discloses a folded cascade photovoltaic power generation subassembly, relates to the technical field of photovoltaic equipment, including two sets of photovoltaic box by the hinge connection, the inside of photovoltaic box is provided with foldable multilayer photovoltaic mechanism, and multilayer photovoltaic mechanism includes fixed photovoltaic board, installation photovoltaic board and multiunit activity photovoltaic board, fixed photovoltaic board, activity photovoltaic board and installation photovoltaic board all include the plate body, the inner chamber dismantlement of plate body is connected with photovoltaic solar panel, the top both sides of plate body are opened has spacing slide, the bottom both sides of plate body are equipped with the spacing slider with spacing slide looks adaptation. The photovoltaic power generation panel is portable in use, quick in installation and use, quick in folding and unfolding and high in stability.
The above foldable photovoltaic power generation assembly still has the following disadvantages: the structure is complicated, and folding rotation angle is too big, damages photovoltaic power generation board easily, and photovoltaic power generation board's angle adjustability is poor, can't adapt to the safe handling under the different weather, also can't carry out the best to the solar energy of different time quantums and acquire the electricity generation.
Therefore, in order to solve the above problems, it is necessary to design a foldable photovoltaic power generation assembly with reasonable efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure, it is integrative that integrated flexible and upset for can control angle regulation when photovoltaic power generation board expandes, can effectively stretch out and draw back when packing up in order to guarantee structural stability, the upset is reasonable, and photovoltaic power generation board is not fragile, can be applicable to and use, the high folded cascade photovoltaic power generation subassembly of security under the different weather different times.
In order to achieve the above object, the utility model provides a folded cascade photovoltaic power generation subassembly, its characterized in that: the photovoltaic power generation assembly comprises two parallel sliding guide rails and a plurality of photovoltaic power generation plates arranged between the two sliding guide rails, wherein a limiting plate is arranged at one end of each of the two sliding guide rails; the two sides of each photovoltaic power generation plate are symmetrically provided with sliding blocks, the photovoltaic power generation plates are rotationally connected with the sliding blocks on the two sides through rotating mechanisms and are in sliding connection with the sliding guide rails on the corresponding sides through the sliding blocks, and the sliding blocks on the same side of two adjacent photovoltaic power generation plates are connected through telescopic rods and are connected with the limiting plates; the rotating mechanism comprises a first driving motor and a rotating shaft, the first driving motor is installed on a sliding block at one end of the photovoltaic power generation panel, the rotating shaft is installed on an output shaft of the first driving motor, the other end of the rotating shaft is rotatably connected with the sliding block at the other end of the photovoltaic power generation panel, and the photovoltaic power generation panel is installed on the rotating shaft.
The utility model discloses better technical scheme: an outer groove and an inner sliding groove with the width larger than that of the outer groove are formed in one side, close to the photovoltaic power generation panel, of the sliding guide rail, the outer groove and the inner sliding groove are both strip-shaped groove bodies, sliding blocks on two sides of the photovoltaic power generation panel and telescopic rods for connecting two adjacent sliding blocks are located in the inner sliding groove, and the sliding blocks are connected with the inner sliding groove in a sliding mode; one end of the rotating shaft is connected with an output shaft of the first driving motor, the other end of the rotating shaft is connected with the corresponding side sliding block through a rotating bearing, the width of the outer groove is larger than the outer diameters of the first driving motor and the rotating bearing, and the first driving motor and the rotating bearing are respectively embedded in the outer grooves of the two sliding guide rails.
The utility model discloses better technical scheme: the telescopic link is electric telescopic handle to be furnished with second driving motor, second driving motor installs in the one side that limiting plate was kept away from to every slider, the tip and the adjacent slider joint of telescopic link, and the slider that just closes on the limiting plate also passes through electric telescopic handle and limiting plate connection, and this electric telescopic handle's second driving motor installs on the limiting plate.
The utility model discloses better technical scheme: the pivot is located photovoltaic power generation board's well line of dividing, corresponds the fixed position of pivot at photovoltaic power generation board and is equipped with and pivot assorted recess, the pivot is fixed in the recess.
The utility model discloses better technical scheme: the free ends of the two sliding blocks far away from the limiting plate are provided with arc-shaped protective pads.
The utility model discloses better technical scheme: one side of photovoltaic power generation board is provided with protruding board, photovoltaic power generation board is kept away from one side of protruding board is provided with and is used for the convenience protruding board male recess.
The utility model discloses the collection is flexible and upset into an organic whole for can control angle regulation when photovoltaic power generation board expandes, can effectively stretch out and draw back when packing up in order to guarantee structural stability, and the upset is reasonable, and photovoltaic power generation board is not fragile, can be applicable to and use under the different weather different times, and the security is high.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
fig. 2 is a schematic view of a three-dimensional structure of the photovoltaic power generation panel after being turned over in the present invention;
fig. 3 is a schematic view of the three-dimensional structure of the photovoltaic power generation panel according to the present invention after being contracted;
FIG. 4 is a schematic view of the overall structure of the present invention;
fig. 5 is a schematic top view of the sliding guide rail-less structure of the present invention.
In the figure: 1-sliding guide rail, 100-outer groove, 101-inboard spout, 2-photovoltaic power generation board, 200-protruding board, 3-limiting plate, 4-slider, 5-first driving motor, 6-pivot, 7-rolling bearing, 8-telescopic link, 9-second driving motor, 10-arc protection pad.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of modules and steps and the steps set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the flows in the drawings are not merely performed individually for convenience of description, but a plurality of steps are performed alternately with each other.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which the product of the present invention is usually placed when in use, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Techniques, methods, and systems known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
As shown in fig. 1 to 5, the foldable photovoltaic power generation assembly provided by the embodiment includes two parallel sliding guide rails 1 and a plurality of photovoltaic power generation panels 2 arranged between the two sliding guide rails 1, wherein one end of each of the two sliding guide rails 1 is provided with a limiting plate 3; the utility model discloses in, the quantity of limiting plate 3 is one, and limiting plate 3 sets up in two sliding guide 1's one end, just limiting plate 3 sets up two perpendicularly with sliding guide 1 be provided with a plurality of photovoltaic power generation board 2 between the sliding guide 1. The sliding guide rail 1 is an integrally formed part, preferably, the sliding guide rail 1 is an aluminum alloy part formed before leaving a factory, and has light weight, high strength and guaranteed stability. The two sides of each photovoltaic power generation panel 2 are symmetrically provided with sliding blocks 4, the photovoltaic power generation panels 2 are connected with the sliding blocks 4 on the two sides in a rotating mode through rotating mechanisms, the sliding guide rails 4 are connected with the sliding guide rails 1 on the corresponding sides in a sliding mode, the sliding guide rails 1 are close to one sides of the photovoltaic power generation panels 2, outer grooves 100 and inner sliding grooves 101, the outer grooves 100 and the inner sliding grooves 101 are long strip-shaped groove bodies, a groove with a T-shaped cross section is formed by the outer grooves 100 and the inner sliding grooves 101, the sliding blocks 4 on the two sides of the photovoltaic power generation panels 2 and telescopic rods 8 connected with the two adjacent sliding blocks are located in the inner sliding grooves 101, and the sliding blocks 4 are connected with the inner sliding grooves 101 in a sliding mode. The utility model discloses a two sliding guide 1, including pivot 6, first driving motor 5, rolling bearing 7, outer groove 100, first driving motor 5, rolling bearing 7, pivot 6 one end and first driving motor 5 output shaft, the other end passes through rolling bearing 7 and is connected with corresponding side slider, the width in outer groove 100 is greater than first driving motor 5 and rolling bearing 7's external diameter, and first driving motor 5 and rolling bearing 7 inlay respectively and establish in the outer groove 100 of two sliding guide 1, and the rolling bearing 7 of the other end also can adopt driving motor to replace, and when adopting driving motor, the driving motor synchronous motion at both ends, and the rotation direction is opposite. Photovoltaic power generation board 2 is installed in pivot 6, and pivot 6 is located photovoltaic power generation board 2 and divides on the line, correspond pivot 6 fixed position at photovoltaic power generation board 2 and be equipped with 6 assorted recesses of pivot, pivot 6 is fixed in the recess. Control photovoltaic power generation board 2 through first driving motor 5 and rotate, photovoltaic power generation board 2 slides under sliding guide 1's is spacing through the slider 4 at both ends for photovoltaic power generation board 2 can stretch out and draw back and the upset.
According to the foldable photovoltaic power generation assembly provided by the embodiment, as shown in fig. 5, the sliding blocks 4 on the same side of two adjacent photovoltaic power generation plates 2 are connected through the telescopic rods 8 and are connected with the limiting plates 3; the rotating mechanism comprises a first driving motor 5 and a rotating shaft 6, the first driving motor 5 is installed on a sliding block 4 at one end of the photovoltaic power generation panel 2, the rotating shaft 6 is installed on an output shaft of the first driving motor 5, and the other end of the rotating mechanism is connected with the sliding block at the other end of the photovoltaic power generation panel 2 in a rotating mode. The telescopic link 8 is electric telescopic handle to be furnished with second driving motor 9, second driving motor 9 installs in the one side that limiting plate 3 was kept away from to every slider 4, and the tip and the 4 joints of adjacent slider of every telescopic link 8, and the slider 4 that closes on limiting plate 3 also is connected with limiting plate 3 through electric telescopic handle, and this electric telescopic handle's second driving motor 9 installs on limiting plate 3. One side of photovoltaic power generation board 2 is provided with protruding board 200, photovoltaic power generation board 2 keeps away from one side of protruding board 200 sets up and protruding board 200 assorted recess, can be when 2 horizontality of all photovoltaic power generation boards, and shrink through telescopic link 8 and use all photovoltaic power generation board 2 to splice into a holistic photovoltaic power generation board.
In order to avoid the separation of the sliding block 4 from the sliding guide rail 1, a blocking block at least partially located in the inner side sliding groove 101 is arranged at one end of the sliding guide rail 1, which is far away from the limiting plate 3, and precisely, when the sliding block 4 is installed, the blocking block is not installed, the sliding blocks 4 are sequentially slid into the inner side sliding groove 101 from one ends, which are far away from the limiting plate 3, of the inner side sliding groove 101, and then the blocking block is arranged in the inner side sliding groove 101, so that the sliding block 4 is prevented from being separated from one end, which is far away from the limiting plate 3, of the inner side sliding groove 101. An arc-shaped protective pad 10 is arranged on one side, away from the limiting plate 3, of the sliding block 4 farthest away from the limiting plate 3; to prevent the slide block 4 from hitting the stop block and to stably protect the photovoltaic panel 2, the protection pad 212 is preferably a rubber cushion.
The photovoltaic power generation subassembly in the embodiment includes rotatory upset function and flexible function, and its upset/rotation function specifically drives axis of rotation 6 and rotates when starting through first driving motor 5 to drive and axis of rotation 6 fixed connection's photovoltaic power generation board 2 winds the axial lead of axis of rotation 6 rotates, accomplishes the upset of photovoltaic power generation board 2. The flexible function is kept away from at every slider 4 one side of limiting plate 3 with one side that limiting plate 3 is close to slider 4 all is provided with telescopic link 8 and is used for control telescopic link 8 carries out flexible second driving motor 9, and the extending direction of telescopic link 8 is the same with inboard spout 101 extending direction, and telescopic link 8 and second driving motor 9 all set up in inboard spout 101, when second driving motor 9 starts, can drive telescopic link 8 flexible to control the distance between slider 4 and the limiting plate 3. When the plurality of telescopic rods 8 are retracted, all the sliding blocks 4 and the photovoltaic power generation panel 2 are retracted towards the limiting plate 3; conversely, when the plurality of telescopic rods 8 are all extended, all the sliding blocks 4 and the photovoltaic power generation panel 2 are far away from the limiting plate 3 to be opened. The utility model provides a slider 4's cross-section size equals the cross-section size of inboard spout 101, so slider 4 can only slide in inboard spout 101 can not the pivoted.
The utility model discloses a use as follows:
basic usage: after the photovoltaic power generation panels 2 are installed, all the second driving motors 9 are started, all the telescopic rods 8 are controlled to extend to the maximum, then the first driving motor 5 is started, all the photovoltaic power generation panels 2 are controlled to be arranged in parallel with the sliding guide rail 1, at the moment, all the photovoltaic power generation panels 2 are on the same plane, and as shown in fig. 1, the maximum expansion of all the photovoltaic power generation panels 2 can be completed;
the basic retraction method comprises the following steps: when the first driving motor 5 is started, all the photovoltaic power generation panels 2 are controlled to be arranged vertically to the sliding guide rail 1, and at the moment, all the photovoltaic power generation panels 2 are arranged in parallel, as shown in fig. 2; then, all the second driving motors 9 are started, all the telescopic rods 8 are controlled to retract to the minimum length, the distance between the plurality of photovoltaic power generation panels 2 is minimized, and as shown in fig. 3, the retracted state of all the photovoltaic power generation panels 2 is completed;
the first advanced usage: start all second driving motor 9 control telescopic links 8 and all stretch out to the biggest, and first driving motor 5 drives to all photovoltaic power generation boards 2 all on the coplanar, as shown in fig. 1, at this moment, restart all second driving motor 9 control telescopic links 8 retractions, photovoltaic power generation board 2 keeps away from one side of protruding board 200 is provided with and is used for making things convenient for on the adjacent photovoltaic power generation board 2 protruding board 200 male recess, when two photovoltaic power generation boards 2 hug closely, the protruding board 200 of a photovoltaic power generation board 2 just inserts in the recess of another photovoltaic power generation board 2, link to each other around all two photovoltaic power generation boards 2 till for a plurality of photovoltaic power generation boards 2 form effective concatenation, form a bigger photovoltaic power generation board, at this moment, all photovoltaic power generation boards 2 end to end, the solar energy power generation energy supply does not have the influence, but prevent wind the ability is stronger, and stability is better, more difficult the rocking.
The second step of usage: all the second driving motors 9 are started to control the telescopic rods 8 to extend to the maximum, the first driving motor 5 drives all the photovoltaic power generation panels 2 to be on the same plane, as shown in fig. 1, the first driving motor 5 is a stepping motor, a rotating program can be set, and the specified angle can be rotated at a specified time to ensure that the position of the sun is followed; the first driving motor 5 can be driven to work according to a preset program according to the position of the sun, so that all the photovoltaic power generation panels 2 always face the direction of the sun, namely the angle is adjusted in real time, and the solar receiving area is maximized; here, since the distance between the sun and the earth is long, the sunlight can be understood as parallel light, so that regardless of the adjustment of the angle, all the photovoltaic power generation panels 2 are still arranged in parallel, that is, all the first driving motors 5 are synchronously controlled.
The utility model relates to a folded cascade photovoltaic power generation subassembly's simple structure, integrated flexible and upset are integrative for can control angle regulation when photovoltaic power generation board expandes, can effectively stretch out and draw back when packing up in order to guarantee structural stability, and the upset is reasonable, and photovoltaic power generation board is not fragile, can be applicable to and use under the different weather different times, and the security is high.
The present invention is not limited to the above-described specific embodiments, and various modifications and changes are possible. Any modification, equivalent replacement, improvement and the like made to the above embodiments according to the technical spirit of the present invention should be included in the scope of protection of the present invention.
Claims (6)
1. A folded cascade photovoltaic power generation subassembly which characterized in that: the photovoltaic power generation assembly comprises two parallel sliding guide rails (1) and a plurality of photovoltaic power generation plates (2) arranged between the two sliding guide rails (1), wherein a limiting plate (3) is arranged at one end of each of the two sliding guide rails (1); the two sides of each photovoltaic power generation plate (2) are symmetrically provided with sliding blocks (4), the photovoltaic power generation plates (2) are rotatably connected with the sliding blocks (4) on the two sides through rotating mechanisms and are slidably connected with the sliding guide rails (1) on the corresponding sides through the sliding blocks (4), and the sliding blocks (4) on the same side of two adjacent photovoltaic power generation plates (2) are connected through telescopic rods (8) and are connected with the limiting plates (3); slewing mechanism includes first driving motor (5) and pivot (6), install on photovoltaic power generation board (2) wherein slider (4) of one end first driving motor (5), the output shaft at first driving motor (5) is installed in pivot (6), and the other end rotates with the slider of photovoltaic power generation board (2) the other end to be connected, photovoltaic power generation board (2) are installed in pivot (6).
2. Foldable photovoltaic module according to claim 1, characterized in that: an outer groove (100) and an inner sliding groove (101) with the width larger than that of the outer groove (100) are formed in one side, close to the photovoltaic power generation panel (2), of the sliding guide rail (1), the outer groove (100) and the inner sliding groove (101) are both strip-shaped groove bodies, sliding blocks (4) on two sides of the photovoltaic power generation panel (2) and telescopic rods (8) connecting two adjacent sliding blocks are located in the inner sliding groove (101), and the sliding blocks (4) are in sliding connection with the inner sliding groove (101); one end of the rotating shaft (6) is connected with an output shaft of the first driving motor (5), the other end of the rotating shaft is connected with a corresponding side sliding block through a rotating bearing (7), the width of the outer groove (100) is larger than the outer diameters of the first driving motor (5) and the rotating bearing (7), and the first driving motor (5) and the rotating bearing (7) are respectively embedded in the outer grooves (100) of the two sliding guide rails (1).
3. Foldable photovoltaic module according to claim 1 or 2, characterized in that: the telescopic rod (8) is an electric telescopic rod and is provided with a second driving motor (9), the second driving motor (9) is installed on one side, away from the limiting plate (3), of each sliding block (4), and the end part of each telescopic rod (8) is clamped with the adjacent sliding block (4); the sliding block (4) close to the limiting plate (3) is also connected with the limiting plate (3) through an electric telescopic rod, and a second driving motor (9) of the electric telescopic rod is installed on the limiting plate (3).
4. A foldable photovoltaic power generation assembly according to claim 1 or 2, characterized in that: pivot (6) are located the branch line of photovoltaic power generation board (2), correspond pivot (6) fixed position in photovoltaic power generation board (2) and be equipped with pivot (6) assorted recess, pivot (6) are fixed in the recess.
5. Foldable photovoltaic module according to claim 1 or 2, characterized in that: the free ends of the two sliding blocks (4) far away from the limiting plate (3) are provided with arc-shaped protective pads (10).
6. Foldable photovoltaic module according to claim 1 or 2, characterized in that: one side of photovoltaic power generation board (2) is provided with protruding board (200), photovoltaic power generation board (2) are kept away from one side of protruding board (200) sets up and protruding board (200) assorted recess.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221162379.2U CN217643237U (en) | 2022-05-13 | 2022-05-13 | Folded cascade photovoltaic power generation subassembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221162379.2U CN217643237U (en) | 2022-05-13 | 2022-05-13 | Folded cascade photovoltaic power generation subassembly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116054707A (en) * | 2022-12-30 | 2023-05-02 | 国家电投集团云南国际电力投资有限公司 | Photovoltaic electrolytic aluminum power grid power generation device |
| CN116201300A (en) * | 2023-04-28 | 2023-06-02 | 中城投集团新能源有限责任公司 | Integrated EPC photovoltaic roof control system and method |
| CN116995358A (en) * | 2023-09-26 | 2023-11-03 | 内蒙古慧科新能源科技有限公司 | Battery pack and folding photovoltaic device |
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2022
- 2022-05-13 CN CN202221162379.2U patent/CN217643237U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116054707A (en) * | 2022-12-30 | 2023-05-02 | 国家电投集团云南国际电力投资有限公司 | Photovoltaic electrolytic aluminum power grid power generation device |
| CN116054707B (en) * | 2022-12-30 | 2024-03-26 | 国家电投集团云南国际电力投资有限公司 | Photovoltaic electrolytic aluminum power grid power generation device |
| CN116201300A (en) * | 2023-04-28 | 2023-06-02 | 中城投集团新能源有限责任公司 | Integrated EPC photovoltaic roof control system and method |
| CN116201300B (en) * | 2023-04-28 | 2023-08-22 | 中城投集团新能源有限责任公司 | Integrated EPC photovoltaic roof control system and method |
| CN116995358A (en) * | 2023-09-26 | 2023-11-03 | 内蒙古慧科新能源科技有限公司 | Battery pack and folding photovoltaic device |
| CN116995358B (en) * | 2023-09-26 | 2023-12-26 | 内蒙古慧科新能源科技有限公司 | Battery pack and folding photovoltaic device |
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