Photovoltaic array power generation components and efficiency enhancement devices

Abstract

The present invention relates to the technical field of photovoltaic power generation, and provides an efficiency enhancement device for a photovoltaic array power generation component and a photovoltaic array power generation component having the efficiency enhancement device. The photovoltaic array power generation component includes a first solar cell and a second solar cell located on the rear side of the first solar cell, the efficiency enhancement device is located between the first solar cell and the second solar cell, the efficiency enhancement device includes at least one first wing plate and a plurality of second wing plates, the first and second wing plates are arranged in turn along the back side of the first solar cell from top to bottom, the first wing plate is a light-transmitting wing plate, which can refract sunlight scattered in the interval area between the first and second solar cells onto the second solar cell, and the ambient wind can pass over the back side of the first solar cell under the guidance of the first and second wing plates. The efficiency enhancement device provided by the present invention can improve the power generation of the photovoltaic array and the conversion efficiency of the solar cell.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to an efficiency enhancing device for a photovoltaic array power generation component and a photovoltaic array power generation component having the efficiency enhancing device. Background Art

[0002] Since 2013, my country's photovoltaic power generation grid-connected installed capacity has grown rapidly. By the end of 2021, the photovoltaic power generation grid-connected installed capacity reached 306 million kilowatts. According to statistics from the National Energy Administration, in 2021, my country's new photovoltaic power generation grid-connected installed capacity was 54.88 million kilowatts, of which array photovoltaics accounted for about 55%, and the development trend of centralized and array photovoltaic power generation was obvious. However, due to the influence of technology and various factors, the photovoltaic array components installed in the early stage had a low photoelectric conversion efficiency, but they still had a service life of more than ten years, resulting in the fact that the power generation capacity of the photovoltaic array was not maximized under such a large installed scale, which caused relative waste. Summary of the invention

[0003] In view of this, the present invention aims to provide an efficiency enhancing device for a photovoltaic array power generation component, which can solve or at least alleviate the above-mentioned problems, and a photovoltaic array power generation component having the efficiency enhancing device.

[0004] To this end, the present invention provides an efficiency enhancement device for a photovoltaic array power generation component, wherein the photovoltaic array power generation component includes a first solar cell and a second solar cell located on the rear side of the first solar cell, the efficiency enhancement device is located between the first solar cell and the second solar cell, and the efficiency enhancement device includes at least one first wing plate and a plurality of second wing plates, the first wing plate and the second wing plate are arranged in sequence along the back side of the first solar cell from top to bottom, the first wing plate is a light-transmitting wing plate, which can refract sunlight scattered in the interval area between the first solar cell and the second solar cell onto the second solar cell, and the ambient wind can pass over the back side of the first solar cell under the guidance of the first wing plate and the second wing plate.

[0005] In some embodiments, the spacing distribution between adjacent first wing panels and second wing panels and between adjacent second wing panels increases non-uniformly in sequence from top to bottom along the back side of the first solar cell.

[0006] In some embodiments, the first airfoil has an upper surface facing the first solar cell and a lower surface facing away from the first solar cell.

[0007] In some embodiments, a cross-sectional shape of the first airfoil panel or the second airfoil panel is arcuate, plano-convex, or biconvex.

[0008] In some embodiments, the efficiency enhancement device for a photovoltaic array power generation assembly further includes a mounting frame on which the first airfoil panel and the second airfoil panel can be mounted.

[0009] In some embodiments, a reflector is arranged on the front side of the second solar cell.

[0010] In some embodiments, one first airfoil panel and three second airfoil panels are included.

[0011] In some embodiments, the first airfoil profile panel and the second airfoil profile panel are both configured as warping airfoil profile panels.

[0012] In some embodiments, the first airfoil is provided with a low portion and a high portion that are diagonally crossed.

[0013] The present invention also provides a photovoltaic array power generation component including the above efficiency enhancement device.

[0014] The beneficial effects of the present invention are that the efficiency enhancement device has a simple structure and low cost, can make full use of the sunlight outside the shadows between the arrays of the photovoltaic array power generation components, supplement the solar cells, increase the solar irradiance, and improve the power generation of the photovoltaic array; guide the ambient wind to pass downward over the components to achieve an enhanced heat dissipation effect, effectively reduce the component temperature, and improve the conversion efficiency of the solar cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a photovoltaic array power generation assembly with an efficiency enhancement device according to a first embodiment of the present invention is shown, wherein the flow direction of the ambient wind and the light path deflected by the efficiency enhancement device are schematically shown.

[0016] Figure 2 Shows Figure 1 A structural schematic diagram of an embodiment of an efficiency enhancement device for a photovoltaic array power generation assembly is shown.

[0017] Figure 3 A schematic structural diagram of a photovoltaic array power generation assembly with an efficiency enhancement device according to a second embodiment of the present invention is shown, wherein the flow direction of the ambient wind and the light path deflected by the efficiency enhancement device are schematically shown.

[0018] Figure 4 A schematic structural diagram of a photovoltaic array power generation assembly with an efficiency enhancement device according to a third embodiment of the present invention is shown, wherein the flow direction of the ambient wind and the light path deflected by the efficiency enhancement device are schematically shown.

[0019] Figure 5 Shows Figure 4 A perspective schematic diagram of a first airfoil panel of the third embodiment is shown.

[0020] Description of reference numerals:

[0021] 100-photovoltaic array power generation component; 11-first solar cell; 12-second solar cell; 2-efficiency enhancement device; 21-first wing plate; 211-upper surface; 212-lower surface; 22-second wing plate; 221-connecting rod; 3-mounting frame; 31-fixed bracket; 32-side bracket; 33-bottom bracket; 34-connecting hole; 35-mounting hole; 4-reflector; 5-adjusting seat. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments to make the technical solution and beneficial effects of the present invention clearer. It should be understood that the accompanying drawings are only provided for reference and explanation, and are not used to limit the present invention. The sizes shown in the accompanying drawings are only for the convenience of clear description, and do not limit the proportional relationship.

[0023] like Figure 1 As shown, the photovoltaic array power generation component 100 provided by the first embodiment of the present invention includes a first solar cell 11, a second solar cell 12 located at the rear side of the first solar cell 11, and an efficiency enhancement device 2 arranged between the first solar cell 11 and the second solar cell 12. The first solar cell 11 and the second solar cell 12 can adopt the existing solar cell settings, which are not described in detail here. The efficiency enhancement device 2 can converge the sunlight scattered in the interval area between the first solar cell 11 and the second solar cell 12 to the second solar cell 12 on the rear side, and can guide the ambient wind to slightly sweep the first solar cell 11 downward, so as to increase the solar irradiance of the second solar cell 12 and strengthen the heat dissipation of the first solar cell 11, thereby improving the photoelectric conversion efficiency of the photovoltaic array power generation component 100.

[0024] Specifically, the efficiency enhancement device 2 includes at least one first wing plate 21 and a plurality of second wing plates 22 arranged on the rear side of the first solar cell 11, wherein the first wing plate 21 and the second wing plate 22 are arranged in sequence along the back side of the first solar cell 11 from top to bottom. Preferably, the number of the second wing plates 22 is 2, 3 or 4.

[0025] The first wing plate 21 is a light-transmitting wing plate made of a light-transmitting material, which refracts the sunlight scattered in the interval area to the second solar cell 2 to increase the solar irradiance, and when the ambient wind passes by, it is guided by the surface of the first wing plate 21 and, under the joint action of the second wing plate 22, traverses the back side of the first solar cell 11 to reduce the temperature of the first solar cell 11. The light-transmitting material can be selected from glass, crystal, light-transmitting high molecular polymer material or transparent glass fiber reinforced plastic, etc.

[0026] In this embodiment, the first wing plate 21 is provided with an upper surface 211 facing the first solar cell 11 and a lower surface 212 facing away from the first solar cell 11. Preferably, the upper surface 211 is set to be a curved surface convex to the first solar cell 11; the lower surface 212 is set to be a plane substantially parallel to the back side of the first solar cell 11. When the ambient wind passes by, it is guided by the upper surface 211 and the lower surface 212 and passes over the back side of the first solar cell 11, thereby cooling its components. Optionally, the surface of the first wing plate 21 facing away from the first solar cell 11 may also be set to be a concave or convex curved surface. The cross-sectional shape of the first wing plate 21 may be an arch, a flat convex shape, a biconvex shape or other optional shapes.

[0027] Preferably, the first wing panel 21 is higher than the first solar cell 11 in the vertical direction, and can change the flow direction of the ambient wind and deflect the scattered sunlight to the second solar cell 12 without blocking the second solar cell 12. In this embodiment, the spacing distribution between adjacent first wing panels 21 and second wing panels 22 and between adjacent second wing panels increases non-uniformly in sequence from top to bottom along the back side of the first solar cell 11. The vertical distance between the first wing panel 21 and the uppermost second wing panel 22 is smaller than the vertical distance between the second wing panel 22 and the second wing panel adjacent to it.

[0028] The second wing profile plate 22 may adopt the same wing profile as the first wing profile plate 21 or other wing profiles different from the first wing profile plate 21. Preferably, the second wing profile plate 22 is made of an opaque material, preferably a metal material, which saves costs and facilitates heat dissipation.

[0029] The efficiency enhancement device 2 of the present invention is provided with a separate mounting frame. Figure 2The efficiency enhancing device 2 equipped with a mounting frame 3 is shown. The first wing plate 21 and the second wing plate 22 of the efficiency enhancing device 2 are fixed to the mounting frame 3 by screws, nuts, washers and other components. The mounting frame 3 includes a bottom bracket 33, a side bracket 32 ​​connected to the bottom bracket 33, and a fixed bracket 31 connected to the bottom bracket 33 and the side bracket 32. In this embodiment, the bottom bracket 33, the side bracket 32 ​​and the fixed bracket 31 are combined into a triangular structure, so that the mounting frame 3 has good stability. A plurality of connecting holes 34 are provided on the fixed bracket 31, and a plurality of mounting controls 35 are provided on the side bracket 32. The fixed bracket 31 and the side bracket 32 ​​are connected through corresponding holes, so that the angle between the two can be changed, so that the efficiency enhancing device 2 can adapt to different solar cell inclination angles. The first wing plate 21 and the second wing plate 22 are respectively installed on the mounting frame 3 through the connecting holes 34 of the fixed bracket 31, and the position, height and deflection angle of the wing plates can be adjusted. Optionally, the bottom bracket 33 , the side bracket 32 ​​and the fixed bracket 31 may all be made of angle steel to make the structure of the mounting frame 3 more stable.

[0030] The efficiency enhancement device 2 can also be installed on the support of the solar cell for combined use, for example, the fixing bracket 31 that can connect the first wing panel 21 and the second wing panel 22 is directly installed on the support of the solar cell.

[0031] Figure 3 The schematic diagram of the structure of the photovoltaic array power generation assembly with an efficiency enhancement device of the second embodiment of the present invention is shown. Compared with the first embodiment, the present embodiment adds a reflector 4 with adjustable angle. The reflector 4 is placed on the front side of the second solar cell 12. The reflector 4 is configured as a plane reflector. The reflector 4 is mounted on an adjustment seat 5, and the adjustment seat 5 includes a base and a rotating seat rotatably mounted on the base, and preferably the rotating seat and the base are connected by a rotating shaft mechanism. The reflector 4 is mounted on the rotating seat so that the user can adjust the inclination angle of the reflector 4. Preferably, for a solar cell with an inclination angle of 33°, in order to enable the second solar cell 12 to receive solar radiation to the maximum extent, the width of the plane reflector is 110 mm and the inclination angle is 45°. During installation, in order to facilitate snow and dust removal, the reflector 4 is spaced a certain distance from the solar cell.

[0032] also, Figure 4 The schematic diagram of the structure of the photovoltaic array power generation assembly with the efficiency enhancement device of the third embodiment of the present invention is also shown. In this embodiment, the first wing plate 21 and the second wing plate 22 are both configured as warped wing plates. The first wing plate 21 is used as an example to specifically describe the warped wing plate. Figure 5As shown, the first airfoil 21 has a low portion 211 and a high portion 212 that are diagonally distributed, and the high portion 212 is higher than the low portion 211. Preferably, the relative height between the high portion 212 and the bottom portion 211 on the same side is preferably less than one fifth of the width of the airfoil.

[0033] For the experiment of solar cells (1950mm*995mm) with an inclination angle of 33°, preferably, the efficiency enhancement device 2 used includes a first wing plate 21 and three second wing plates 22, the width of the wing plate is 5cm, the relative inclination angle is 30°, and the distance between the wing plate and the first solar cell 11 is 11cm; the length of the wing plate is selected according to the lateral size of the solar cell panel, preferably it is roughly the same as the lateral size of the solar cell panel; the thickness of the wing plate is less than the width of the wing plate, preferably less than one tenth of the width of the wing plate. According to the measured experimental data, supplementary lighting can improve the comprehensive performance by 4% per year, wind guide cooling can improve the efficiency by more than 3% per year, and the annual average comprehensive performance can be improved by more than 5%.

[0034] The efficiency enhancement device provided by the present invention can make full use of the sunlight outside the shadows between the arrays of the photovoltaic array power generation components to supplement the solar cells, increase the solar irradiance, and improve the power generation of the photovoltaic array; guide the ambient wind to sweep the components downward to achieve an enhanced heat dissipation effect, effectively reduce the component temperature, and improve the conversion efficiency of the solar cell.

Claims

1. A photovoltaic array power generation component efficiency enhancement device, wherein the photovoltaic array power generation component comprises a first solar cell and a second solar cell located behind the first solar cell, wherein the efficiency enhancement device is located between the first solar cell and the second solar cell, characterized in that: The efficiency enhancement device includes at least one first wing plate and multiple second wing plates, the first wing plate and the second wing plate are arranged in sequence along the back side of the first solar cell from top to bottom. The first wing plate is vertically higher than the first solar cell. The spacing distribution between adjacent first wing plates and second wing plates and between adjacent second wing plates increases non-uniformly in sequence from top to bottom along the back side of the first solar cell. The first wing plate is a light-transmitting wing plate, which can refract sunlight scattered in the spacing area between the first solar cell and the second solar cell onto the second solar cell, and the ambient wind can pass over the back side of the first solar cell under the guidance of the first wing plate and the second wing plate; the first wing plate and the second wing plate are both configured as warped wing plates; the first wing plate has a low portion and a high portion that are diagonally cross-distributed, and the high portion is higher than the low portion; the relative height between the high portion and the bottom portion on the same side is less than one-fifth of the width of the corresponding wing plate.

2. The efficiency enhancement device for photovoltaic array power generation components according to claim 1, characterized in that: The first airfoil plate is provided with an upper surface facing the first solar cell and a lower surface facing away from the first solar cell.

3. The efficiency enhancement device for photovoltaic array power generation components according to claim 1, characterized in that: Also included is a mounting bracket on which the first airfoil panel and the second airfoil panel can be mounted.

4. The efficiency enhancement device for photovoltaic array power generation components according to claim 1, characterized in that: A reflector is provided on the front side of the second solar cell.

5. The efficiency enhancement device for photovoltaic array power generation components according to claim 1, characterized in that: The efficiency enhancement device includes a first airfoil panel and three second airfoil panels.

6. A photovoltaic array power generation assembly comprising a first solar cell and a second solar cell located behind the first solar cell, characterized in that: It also includes the efficiency enhancement device for photovoltaic array power generation components according to any one of claims 1 to 5.

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