A photovoltaic cell testing device

Abstract

The present invention belongs to the technical field of photovoltaic cell testing, and provides a photovoltaic cell testing device, including a box body. A plurality of inner cavities are arranged inside the box body at intervals. An electric lifting seat is fixedly connected to the inner end face of each inner cavity. The telescopic ends of the electric lifting seats are all rotatably connected to gear shafts. A driving assembly is commonly connected between all the gear shafts, and the driving assembly can drive all the gear shafts to rotate simultaneously. In the present invention, all the electric lifting seats drive the corresponding photovoltaic cells to be adjusted to a predetermined height, so that the distances between all the photovoltaic cells and the solar simulator are fixed; then the driving assembly is started, and the driving assembly can drive all the gear shafts to rotate simultaneously, so as to adjust the illumination angles of all the photovoltaic cells at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic cell testing, and particularly relates to a photovoltaic cell testing device. Background Art

[0002] A solar cell is a photovoltaic semiconductor wafer that directly generates electricity using sunlight, also known as a "solar chip" or "photovoltaic cell". As long as it is illuminated by light with a certain illuminance condition, it can instantly output voltage and generate current in the case of a circuit.

[0003] There is a photovoltaic cell testing device with a publication number of CN213846615U, including a frame, a simulation component, a first placement seat, a second placement seat, a controller, a power supply, a display module, a light intensity sensor, a linear motor, and an angle sensor. In this utility model, the first driving gear is used to drive the photovoltaic cell to rotate around the positioning post to detect the storage capacity of the photovoltaic cell at different tilting angles; the second driving gear is used to adjust the light intensity of the simulation component to detect the storage capacity of the photovoltaic cell under different light intensities and different tilting angles.

[0004] In this invention, when testing the photovoltaic cell, the storage capacity of the photovoltaic cell under different light intensities and different tilting angles is detected; however, during the test, the external temperature and wind speed environment of the photovoltaic cell will affect the test results of the photovoltaic cell. The existing photovoltaic cell testing device does not effectively control variables for the external environment, and it cannot test photovoltaic cells under different environmental conditions during the test. Summary of the Invention

[0005] The purpose of the present invention is to provide a photovoltaic cell testing device, aiming to solve the technical problems that the existing photovoltaic cell testing device does not effectively control variables for the external environment and cannot test photovoltaic cells under different environmental conditions during the test.

[0006] The present invention is implemented as follows. A photovoltaic cell testing device includes a box body. A plurality of inner cavities are arranged at intervals inside the box body. Electric lifting seats are fixedly connected to the inner end faces of the inner cavities. The telescopic ends of the electric lifting seats are all rotatably connected to gear shafts. A driving component is commonly connected between all the gear shafts, and the driving component can drive all the gear shafts to rotate simultaneously;

[0007] Each of the gear shafts is fixedly connected with a support plate, a limiting groove for placing a photovoltaic cell is arranged in the support plate, the bottom of the limiting groove is meshed, the support plate is fixedly connected with an arc-shaped shell plate, a diversion port is arranged between the arc-shaped shell plate and the support plate, a plurality of air inlets are arranged at one end of the arc-shaped shell plate far away from the diversion port, the support plate is fixedly connected with an induced draft fan, the induced draft fan is opposite to the air inlets, and a solar simulator is fixedly connected to the side wall of the inner cavity, and the solar simulator is located above the limiting groove;

[0008] A flow splitting mechanism for guiding the wind is arranged on one side of the air inlet, a heating electric component capable of generating heat is arranged in the arc-shaped shell plate, the support plate is fixedly connected with a support frame, and the support frame is connected with a wind guiding mechanism for guiding and dispersing the hot air;

[0009] A control system, which can control the heat receiving uniformity and wind receiving uniformity of the photovoltaic cell by controlling the flow splitting mechanism, the heating electric component and the wind guiding mechanism.

[0010] Further technical solution: The flow splitting mechanism includes a flow splitting plate, a first spring, a first motor and a first cam;

[0011] Flow splitting plates are arranged on one side of each air inlet, all the flow splitting plates are rotatably connected with the inner wall of the arc-shaped shell plate, a first spring is arranged between adjacent two flow splitting plates, the support plate is fixedly connected with a first motor, an output shaft of the first motor is fixedly connected with a first cam, and the first cam is elastically abutted against one side of the flow splitting plate.

[0012] Further technical solution: The heating electric component includes a heating wire mesh plate and a second electric rod, the heating wire mesh plate is rotatably connected with the end face of the support plate, and a second electric rod is rotatably connected between the heating wire mesh plate and the support plate.

[0013] Further technical solution: The wind guiding mechanism includes a wind guiding groove, a wind guiding plate and a power component;

[0014] The end face of the support frame is fixedly connected with a wind guiding groove, and a wind guiding plate is rotatably connected to the end face of the support frame. An elastic torsion spring is connected between the wind guiding plate and a rotating seat on the support frame. The support frame is fixedly connected with a power component, and the power component can push the wind guiding plate to swing continuously.

[0015] Further technical solution: A plurality of filter plates are sequentially rotatably connected to the outer wall of the wind guiding groove, elastic torsion springs are connected to the rotating joints of the filter plates and the outer wall of the wind guiding groove, and a plurality of convex blocks are fixedly connected to the wind guiding plate, and each convex block abuts against a filter plate.

[0016] Further technical solution: The power assembly includes a second motor and a second cam. The second motor is fixedly connected to the support frame. The second cam is fixedly connected to the output shaft of the second motor, and the second cam is elastically abutted against the air deflector.

[0017] Further technical solution: The drive assembly includes a guide rail, a rack bar, and a first electric rod;

[0018] The telescopic ends of the electric lifting seats are commonly connected to a guide rail. A rack bar is slidably connected to the guide rail. The rack bar meshes with all the gear shafts. A first electric rod is fixedly connected between the guide rail and the rack bar.

[0019] Further technical solution: A control system, which includes:

[0020] A monitoring module, which includes two temperature sensors and two wind speed sensors. One temperature sensor and one wind speed sensor are arranged on each of the two end faces of the support plate;

[0021] A storage module, which is used to store the temperature values of all the temperature sensors and the wind speed values of the wind speed sensors;

[0022] A processing module, which is used to compare the temperature difference between the two temperature sensors or the wind speed difference between the two wind speed sensors with the preset temperature difference and wind speed difference thresholds, and form a judgment message;

[0023] A control module, which is used to control the flow splitting mechanism, the electric heating component, and the air guiding mechanism.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. Start all the electric lifting seats. All the electric lifting seats drive the corresponding photovoltaic cells to be adjusted to a predetermined height, so that the distances between all the photovoltaic cells and the solar simulator are fixed; then start the drive assembly. The drive assembly can drive all the gear shafts to rotate simultaneously, so as to adjust the illumination angles of all the photovoltaic cells simultaneously;

[0026] 2. Start the electric heating component to increase the environmental temperature in the inner cavity. At this time, the induced draft fan blows air at the air inlet, and the flow splitting mechanism guides the wind direction, so that the electric heating component heats the bottom of the photovoltaic cells in the limiting grooves. At the same time, the hot air passes through the diversion ports, and then the air guiding mechanism guides and disperses the hot air, so as to heat the upper end faces of the photovoltaic cells, so that the hot air circulates and heats around the photovoltaic cells;

[0027] 3. Under the guiding action of the flow dividing plate, part of the wind blows towards the electric heating grid plate, thereby dissipating the heat of the electric heating grid plate to the photovoltaic cells in the limiting slots, thus heating the bottom of the photovoltaic cells. Under the guiding action of the inner end face of the arc-shaped shell plate, another part of the wind is led out from the diversion port. At the same time, the inner end face of the arc-shaped shell plate can guide part of the wind, thereby increasing the uniformity of heat reception at the bottom of the photovoltaic cells.

[0028] 4. When the temperature difference between the two temperature sensors exceeds the temperature difference of the two temperature sensors, at this time, the control module changes the telescopic length of the second electric rod, thereby changing the heating efficiency of the electric heating grid plate on the bottom of the photovoltaic cells and adjusting the uniformity of heat reception between the two end faces of the photovoltaic cells; changing the rotation speeds of the first motor and the second motor can change the swinging ranges of the flow dividing plate and the air guiding plate, and adjust the uniformity of heat reception of a single end face of the photovoltaic cells.

[0029] 5. When the wind speed difference between the two wind speed sensors exceeds the wind speed difference threshold of the two wind speed sensors, at this time, the control module controls and changes the rotation speeds of the first motor and the second motor, which can change the swinging ranges of the flow dividing plate and the air guiding plate, and improve the uniformity of wind reception of the overall photovoltaic cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the internal structure of the box body in the present invention.

[0032] Figure 3 It is a schematic diagram of the connection between the drive assembly and all gear shafts in the present invention.

[0033] Figure 4 It is a schematic diagram of the structure of the support plate and the arc-shaped shell plate in the present invention.

[0034] Figure 5 It is a schematic diagram of the internal structure of the arc-shaped shell plate in the present invention.

[0035] Figure 6 It is a schematic diagram of the cooperation between the flow dividing mechanism and the electric heating component in the present invention.

[0036] Figure 7 It is Figure 6 a schematic enlarged view of the structure of area A in

[0037] Figure 8 It is a schematic diagram of the structure of the air guiding mechanism in the present invention.

[0038] Figure 9 It is a schematic diagram of the cooperation between the filter plate and the air guiding plate in the present invention.

[0039] In the attached drawings: 1. Box body; 2. Inner cavity; 3. Electric lifting seat; 4. Diversion port; 5. Driving assembly; 51. Guide rail; 52. Rack bar; 53. First electric rod; 6. Flow splitting mechanism; 61. Flow splitting plate; 62. First spring; 63. First motor; 64. First cam; 7. Electric heating assembly; 71. Electric heating grid plate; 72. Second electric rod; 8. Air guiding mechanism; 81. Air guiding groove; 82. Air guiding plate; 83. Power assembly; 831. Second motor; 832. Second cam; 9. Filter plate; 10. Gear shaft; 11. Support plate; 12. Solar simulator; 13. Arc-shaped shell plate; 14. Air inlet; 15. Support frame; 16. Induced draft fan; 17. Limit groove. Detailed implementation mode

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] The following describes in detail the specific implementation of the present invention in conjunction with specific embodiments.

[0042] As shown in Figure 1- Figure 9 As shown, a photovoltaic cell testing device provided by the present invention includes a box body 1. A plurality of inner cavities 2 are arranged at intervals inside the box body 1. An electric lifting seat 3 is fixedly connected to the inner end surface of the inner cavity 2. The telescopic ends of the electric lifting seats 3 are all rotatably connected to gear shafts 10. A driving assembly 5 is commonly connected between all the gear shafts 10. The driving assembly 5 can drive all the gear shafts 10 to rotate simultaneously;

[0043] The gear shafts 10 are all fixedly connected with support plates 11. A limit groove 17 for placing a photovoltaic cell is arranged in the support plate 11. The bottom of the limit groove 17 is meshed. The support plate 11 is fixedly connected with an arc-shaped shell plate 13. A diversion port 4 is arranged between the arc-shaped shell plate 13 and the support plate 11. A plurality of air inlets 14 are arranged at one end of the arc-shaped shell plate 13 away from the diversion port 4. The support plate 11 is fixedly connected with an induced draft fan 16. The induced draft fan 16 is directly opposite to the air inlets 14. A solar simulator 12 is fixedly connected to the side wall of the inner cavity 2. The solar simulator 12 is located above the limit groove 17;

[0044] A flow splitting mechanism 6 for guiding the wind is arranged on one side of the air inlets 14. An electric heating assembly 7 capable of generating heat is arranged in the arc-shaped shell plate 13. The support plate 11 is fixedly connected with a support frame 15. The support frame 15 is connected with an air guiding mechanism 8. The air guiding mechanism 8 is used for guiding and dispersing the hot air;

[0045] A control system that can regulate the heat uniformity and wind uniformity of a photovoltaic cell by controlling a flow diversion mechanism 6, an electric heating component 7, and a wind guiding mechanism 8.

[0046] In this embodiment, the box body 1 is provided with a cover plate for sealing. Open the cover plate of the box body 1, place photovoltaic cells in each limiting groove 17, start all the electric lifting seats 3, and all the electric lifting seats 3 drive the corresponding photovoltaic cells to adjust to a predetermined height, so that the distances between all the photovoltaic cells and the solar simulator 12 are fixed; then start the driving component 5, and the driving component 5 can drive all the gear shafts 10 to rotate simultaneously, so as to adjust the illumination angles of all the photovoltaic cells simultaneously;

[0047] Then close the cover plate of the box body 1, start the electric heating component 7 to raise the ambient temperature in the inner cavity 2. At this time, the induced draft fan 16 blows air at the air inlet 14, and the flow diversion mechanism 6 guides the wind, so that the electric heating component 7 heats the bottoms of the photovoltaic cells in the limiting grooves 17. At the same time, the hot air passes through the diversion port 4, and then the wind guiding mechanism 8 guides and disperses the hot air, so as to heat the upper end surfaces of the photovoltaic cells, so that the hot air circulates and heats around the photovoltaic cells;

[0048] By regulating the control current of the solar simulator 12 and the heating power of the electric heating component 7, the wind speed and temperature around the photovoltaic cell can be controlled.

[0049] As Figure 7 shown, a photovoltaic cell testing device provided by the present invention, the flow diversion mechanism 6 includes a flow diversion plate 61, a first spring 62, a first motor 63, and a first cam 64;

[0050] A flow diversion plate 61 is arranged on one side of each air inlet 14, all the flow diversion plates 61 are rotatably connected to the inner wall of the arc-shaped shell plate 13, a first spring 62 is arranged between adjacent two flow diversion plates 61, the support plate 11 is fixedly connected with a first motor 63, the output shaft of the first motor 63 is fixedly connected with a first cam 64, and the first cam 64 is elastically abutted against one side of the flow diversion plate 61.

[0051] In this embodiment, start the first motor 63, the first motor 63 drives the first cam 64 to rotate, the first cam 64 pushes the flow diversion plate 61 on one side of it to swing, and under the action of all the first springs 62, all the flow diversion plates 61 swing simultaneously, so as to guide the wind blown by the induced draft fan 16.

[0052] As Figure 5As shown in the figure, a photovoltaic cell testing device provided by the present invention, the electric heating component 7 includes an electric heating grid plate 71 and a second electric rod 72. The electric heating grid plate 71 is rotatably connected to the end face of the support plate 11, and a second electric rod 72 is rotatably connected between the electric heating grid plate 71 and the support plate 11.

[0053] In this embodiment, the electric heating grid plate 71 can be electrified and heated. When the second electric rod 72 is started to expand and contract, the second electric rod 72 drives the electric heating grid plate 71 to rotate, thereby adjusting the distance between the electric heating grid plate 71 and the support plate 11 and changing the heating efficiency of the electric heating grid plate 71 on the bottom of the photovoltaic cell.

[0054] Under the guiding action of the flow dividing plate 61, part of the wind blows towards the electric heating grid plate 71, so as to dissipate the heat of the electric heating grid plate 71 to the photovoltaic cell in the limiting groove 17, thereby heating the bottom of the photovoltaic cell. Under the guiding action of the inner end face of the arc-shaped shell plate 13, another part of the wind is led out from the diversion port 4. At the same time, the inner end face of the arc-shaped shell plate 13 can guide part of the wind, thereby increasing the uniformity of heat reception at the bottom of the photovoltaic cell.

[0055] As Figure 8 and Figure 9 shown in the figure, a photovoltaic cell testing device provided by the present invention, the air guiding mechanism 8 includes an air guiding groove 81, an air guiding plate 82 and a power component 83;

[0056] The end face of the support frame 15 is fixedly connected with an air guiding groove 81, and an air guiding plate 82 is rotatably connected to the end face of the support frame 15. An elastic torsion spring is connected between the air guiding plate 82 and the rotating seat on the support frame 15. The support frame 15 is fixedly connected with a power component 83, and the power component 83 can push the air guiding plate 82 to swing continuously.

[0057] In this embodiment, the air guiding groove 81 guides and concentrates the wind. Then, under the combined guiding action of the air guiding plate 82 and the outer wall of the air guiding groove 81, the hot air blows towards the front of the photovoltaic cell. The power component 83 can push the air guiding plate 82 to swing continuously, so as to uniformly heat the entire photovoltaic cell.

[0058] As Figure 9 shown in the figure, a photovoltaic cell testing device provided by the present invention, a plurality of filter plates 9 are sequentially rotatably connected to the outer wall of the air guiding groove 81. Elastic torsion springs are connected to the rotational connection points between the filter plates 9 and the outer wall of the air guiding groove 81. A plurality of convex blocks are fixedly connected to the air guiding plate 82, and each convex block abuts against a filter plate 9.

[0059] In this embodiment, the dust impurities in the inner cavity 2 are filtered by the filter plate 9 to prevent the dust impurities in the air from being too large and affecting the test results of the photovoltaic cell. When the air guide plate 82 swings, the air guide plate 82 pushes the filter plate 9 to vibrate through the bump, preventing the filter plate 9 from being blocked.

[0060] As Figure 8 shown, a photovoltaic cell testing device provided by the present invention, the power assembly 83 includes a second motor 831 and a second cam 832. The second motor 831 is fixedly connected to the support frame 15, the second cam 832 is fixedly connected to the output shaft of the second motor 831, and the second cam 832 is elastically abutted against the air guide plate 82.

[0061] In this embodiment, the second motor 831 is started, the second motor 831 drives the second cam 832 to rotate, the second cam 832 pushes the air guide plate 82 to swing, and under the combined guiding action of the air guide plate 82 and the outer wall of the air guide groove 81, the hot air blows on the front surface of the photovoltaic cell for hot air heating.

[0062] As Figure 3 shown, a photovoltaic cell testing device provided by the present invention, the driving assembly 5 includes a guide rail 51, a rack bar 52 and a first electric rod 53;

[0063] The telescopic ends of the electric lifting seats 3 are commonly connected with a guide rail 51, a rack bar 52 is slidably connected to the guide rail 51, the rack bar 52 meshes with all the gear shafts 10, and a first electric rod 53 is fixedly connected between the guide rail 51 and the rack bar 52.

[0064] In this embodiment, the first electric rod 53 is started to extend and retract, the first electric rod 53 drives the rack bar 52 to horizontally move on the guide rail 51, the rack bar 52 drives all the gear shafts 10 to rotate through meshing with all the gear shafts 10, thereby driving all the support plates 11 to rotate simultaneously, so as to adjust the illumination angles of all the photovoltaic cells.

[0065] A photovoltaic cell testing device, wherein the control system includes:

[0066] A monitoring module, which includes two temperature sensors and two wind speed sensors. One temperature sensor and one wind speed sensor are arranged on each of the two end faces of the support plate 11;

[0067] A storage module, which is used to store the temperature values of all the temperature sensors and the wind speed values of the wind speed sensors;

[0068] A processing module, which is used to compare the temperature difference between the two temperature sensors and the wind speed difference between the two wind speed sensors with a preset temperature difference threshold and a wind speed difference threshold respectively, and form a judgment message; the processing module is preferably a computer processor;

[0069] A control module, which is used to control the flow splitting mechanism 6, the electrothermal component 7 and the air guiding mechanism 8. The control module is preferably a PLC controller;

[0070] The storage module, the processing module and the control module are all arranged in a control box outside the box body 1.

[0071] In this embodiment, when the temperature difference between the two temperature sensors exceeds the temperature difference threshold of the two temperature sensors, at this time, the control module changes the telescopic length of the second electric rod 72, thereby changing the heating efficiency of the electrothermal grid plate 71 at the bottom of the photovoltaic cell and adjusting the heat reception uniformity between the two end faces of the photovoltaic cell; by changing the rotation speeds of the first motor 63 and the second motor 831, the swinging ranges of the flow splitting plate 61 and the air guiding plate 82 can be changed, and the heat reception uniformity of a single end face of the photovoltaic cell can be adjusted;

[0072] When the wind speed difference between the two wind speed sensors exceeds the wind speed difference threshold of the two wind speed sensors, at this time, the control module controls to change the rotation speeds of the first motor 63 and the second motor 831, and the swinging ranges of the flow splitting plate 61 and the air guiding plate 82 can be changed, so as to improve the wind reception uniformity of the overall photovoltaic cell.

[0073] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0074] In addition, it should be understood that although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A photovoltaic cell testing device, comprising a box body (1), wherein a plurality of inner cavities (2) are arranged at intervals inside the box body (1), and the characteristics are that, The inner end face of the inner cavity (2) is fixedly connected with an electric lifting seat (3). The telescopic ends of the electric lifting seat (3) are all rotatably connected with gear shafts (10). A driving assembly (5) is commonly connected between all the gear shafts (10), and the driving assembly (5) can drive all the gear shafts (10) to rotate simultaneously. Each gear shaft (10) is fixedly connected with a support plate (11). A limiting groove (17) for placing a photovoltaic cell is arranged in the support plate (11). The bottom of the limiting groove (17) is reticular. The support plate (11) is fixedly connected with an arc-shaped shell plate (13). A diversion port (4) is arranged between the arc-shaped shell plate (13) and the support plate (11). A plurality of air inlets (14) are arranged at one end of the arc-shaped shell plate (13) away from the diversion port (4). The support plate (11) is fixedly connected with an induced draft fan (16), and the induced draft fan (16) is directly opposite to the air inlets (14). A solar simulator (12) is fixedly connected to the side wall of the inner cavity (2), and the solar simulator (12) is located above the limiting groove (17). A flow splitting mechanism (6) for guiding the wind direction is arranged on one side of the air inlets (14). An electric heating component (7) capable of generating heat is arranged in the arc-shaped shell plate (13). The support plate (11) is fixedly connected with a support frame (15), and the support frame (15) is connected with a wind guiding mechanism (8). The wind guiding mechanism (8) is used for guiding and dispersing the hot air. A regulation system, which can regulate the heat reception uniformity and wind reception uniformity of the photovoltaic cell by controlling the flow splitting mechanism (6), the electric heating component (7) and the wind guiding mechanism (8). The flow splitting mechanism (6) includes a flow splitting plate (61), a first spring (62), a first motor (63), and a first cam (64). Flow splitting plates (61) are arranged on one side of each air inlet (14). All the flow splitting plates (61) are rotatably connected with the inner wall of the arc-shaped shell plate (13). A first spring (62) is arranged between adjacent two flow splitting plates (61). The support plate (11) is fixedly connected with a first motor (63). The output shaft of the first motor (63) is fixedly connected with a first cam (64), and the first cam (64) is elastically abutted against one side of the flow splitting plate (61). The electric heating component (7) includes an electric heating mesh plate (71) and a second electric rod (72). The electric heating mesh plate (71) is rotatably connected with the end face of the support plate (11), and a second electric rod (72) is rotatably connected between the electric heating mesh plate (71) and the support plate (11). The wind guiding mechanism (8) includes a wind guiding groove (81), a wind guiding plate (82), and a power assembly (83). The end face of the support frame (15) is fixedly connected with a wind guiding groove (81), and a wind guiding plate (82) is rotatably connected to the end face of the support frame (15). An elastic torsion spring is connected between the wind guiding plate (82) and the rotating seat on the support frame (15). The support frame (15) is fixedly connected with a power assembly (83), and the power assembly (83) can push the wind guiding plate (82) to swing continuously. A control system, which includes: a monitoring module, which includes two temperature sensors and two wind speed sensors, and one temperature sensor and one wind speed sensor are arranged on each of the two end faces of the support plate (11); a storage module, which is used to store the temperature values of all temperature sensors and the wind speed values of wind speed sensors; a processing module, which is used to compare the temperature difference between the two temperature sensors or the wind speed difference between the two wind speed sensors with a preset temperature difference threshold and wind speed difference threshold respectively, and form judgment information; a control module, which is used to control the flow splitting mechanism (6), the electric heating component (7) and the air guiding mechanism (8).

2. The photovoltaic cell testing device according to claim 1, wherein A plurality of filter plates (9) are sequentially rotatably connected to the outer wall of the air guiding groove (81), elastic torsion springs are connected to the rotation joints of the filter plates (9) and the outer wall of the air guiding groove (81), and a plurality of bumps are fixedly connected to the air guiding plate (82), and each bump abuts against a filter plate (9).

3. A photovoltaic cell testing device according to claim 1, characterized in that, The power component (83) includes a second motor (831) and a second cam (832), the second motor (831) is fixedly connected to the support frame (15), the second cam (832) is fixedly connected to the output shaft of the second motor (831), and the second cam (832) elastically abuts against the air guiding plate (82).

4. A photovoltaic cell testing device according to claim 1, characterized in that, The driving component (5) includes a guide rail (51), a rack bar (52) and a first electric rod (53); The telescopic ends of the electric lifting seats (3) are commonly connected to a guide rail (51), a rack bar (52) is slidably connected to the guide rail (51), the rack bar (52) meshes with all gear shafts (10), and a first electric rod (53) is fixedly connected between the guide rail (51) and the rack bar (52).

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