Photovoltaic panel sunlight tracking method and device

Abstract

The invention provides a sunlight tracking method for a photovoltaic panel. The sunlight tracking method comprises the following steps: using a first push rod to push a photovoltaic panel rotating bracket to rotate around a first axis within a first time interval; the power output to the first push rod is softly switched to the second push rod in the switching time interval; a second push rod is used for pushing the photovoltaic panel rotating support to rotate around a second axis in a second time interval; the switching time interval is located between the first time interval and the second time interval. The device is simple in structure, high in tracking efficiency, low in cost and long in service life.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic power generation, and in particular to a method and device for tracking sunlight on a photovoltaic panel. Background Art

[0002] Designing photovoltaic panels for sunlight tracking can effectively increase the sunlight intensity received by a single photovoltaic panel, thereby improving the power generation efficiency of a single photovoltaic panel.

[0003] Solar tracking systems used in photovoltaic panels are divided into two basic types: single-axis and dual-axis. Single-axis tracking systems track the direction of incoming sunlight in either pitch or azimuth, while dual-axis tracking systems track the direction of incoming sunlight in both pitch and azimuth. Although dual-axis tracking systems can achieve higher power generation efficiency than single-axis tracking systems, their higher cost and overall cost-effectiveness are inferior to single-axis tracking systems. Therefore, single-axis tracking systems are the mainstream products on the market.

[0004] Typically, installing a solar tracking system increases a project's initial costs by approximately 2% to 10%. Compared to fixed installations, photovoltaic panels using a single-axis solar tracking system can increase their average power generation by approximately 20%, while those using a dual-axis solar tracking system can increase their average power generation by approximately 30%. However, for most projects, a photovoltaic power generation system using a single-axis solar tracking system can recoup the increased initial costs more quickly than a system using a dual-axis solar tracking system.

[0005] The following are some of the solar tracking technologies used in photovoltaic panels disclosed in the patent application field: Application No. 202222034833.2, an automatic tracking device for solar panels, comprising: a platform plate (10), a slide plate (7) and a shading square tube (1), one end of the platform plate is connected to the ground via a movable screw (11), the platform plate is hinged to one end of the slide plate, a solar panel is fixed on the slide plate, and the shading square tube is fixed on the top of the slide plate; a horizontal steering device and a height lifting device for changing the angle of the slide plate are fixed on the platform plate.

[0006] Application No. 202211307440.2 discloses a photovoltaic light-tracking system and method. The system comprises a louvered photovoltaic module, a light-tracking drive unit, and a control unit. The louvered photovoltaic module comprises a profile base, an aluminum angle bracket, and a photovoltaic module. The light-tracking drive unit comprises a light-tracking push rod, a light-tracking push block, a motor, a motor brake, a slide, a slide fixture, a slider, a connecting block, a light-tracking bracket, a first photoresistor, and a second photoresistor. A control device is connected to the motor, the motor brake, the first photoresistor, and the second photoresistor, and is configured to control the motor to optimize the light-receiving angle of the photovoltaic module. The present invention utilizes a louvered photovoltaic module, a light-tracking drive unit, and a control unit to achieve light-tracking, thereby increasing the overall power generation of the module while maintaining the same unit light-receiving area. The compact module, composed of small monocrystalline silicon cells welded and encapsulated, significantly reduces the safety risks associated with wind resistance. The use of a PET layer as the module surface encapsulation material optimizes the weight of the photovoltaic module.

[0007] Application No. 201620213130.8, a novel photovoltaic solar panel capable of tracking light, comprising a bottom fixed base, a battery array, a battery pack, and an adjustable frequency motor, wherein a gear bracket is provided on the bottom fixed base, a large gear is provided on the gear bracket, a panel housing bracket is provided on the large gear, a panel housing is provided on the panel housing bracket, the battery array is provided on the upper surface of the panel housing, the battery pack is provided on the back of the panel housing, an electric power output port is provided at the lower end of the battery pack, the adjustable frequency motor is provided on the bottom fixed base, and a small gear is provided on the output shaft of the adjustable frequency motor and below the large gear. The beneficial effect is that the solar panel can always face the sun, further improving the utilization rate of solar energy and achieving high photoelectric conversion efficiency.

[0008] The disadvantages of existing photovoltaic panel tracking technology are: the dual-axis tracking system has a complex structure, high cost, and short service life, while the single-axis tracking system has low efficiency and high cost.

[0009] The present invention provides a photovoltaic panel sunlight tracking method and device, which are used to overcome at least one of the shortcomings of existing photovoltaic panel sunlight tracking technology, such as complex structure, high cost, low efficiency and short life. Summary of the Invention

[0010] The present invention provides a photovoltaic panel sunlight tracking method and device, which are used to overcome at least one of the shortcomings of existing photovoltaic panel sunlight tracking technology, such as complex structure, high cost, low efficiency and short life.

[0011] The present invention provides a photovoltaic panel sunlight tracking method, comprising the following steps: Step S110, using a first push rod to push the photovoltaic panel rotating bracket to rotate around a first axis within a first time interval; Step S120, soft-switching the power output to the first push rod to the second push rod within the switching time interval; Step S130, using a second push rod to push the photovoltaic panel rotating bracket to rotate around a second axis within a second time interval; The switching time interval is between the first time interval and the second time interval; The first axis and the second axis both pass through the first rotation support point, and the angle between the first axis and the second axis is greater than 0 degrees and less than 90 degrees.

[0012] The present invention provides a photovoltaic panel sunlight tracking device, comprising: Linear drive module, first rotation drive module, second rotation drive module, power switching module, photovoltaic panel rotation bracket (3); wherein, A linear drive module, used for providing a driving force for the photovoltaic panel rotating bracket (3), comprising a screw (41), a first slider (11) and a second slider (21); A first rotation drive module is used for driving the photovoltaic panel rotation bracket to rotate around a first axis using a first push rod (12) within a first time interval, and comprises a first push rod (12) and a first rotation arm (13); wherein one end of the first rotation arm (13) is rotationally connected to the fixed frame (4), and the other end is connected to the third rotation support member (33); A second rotation drive module is used for driving the photovoltaic panel rotation bracket to rotate around the second axis using a second push rod (22) within a second time interval, and comprises a second push rod (22) and a second rotation arm (23); wherein one end of the second rotation arm (23) is rotationally connected to the fixed frame (4), and the other end is connected to the second rotation support member (32); A power switching module, used for softly switching the power output to the first push rod (12) to the second push rod (22) within a switching time interval, comprising a first slider (11), a second slider (21) and a slider shifter (42); A photovoltaic panel rotating bracket (3) is used to drive the photovoltaic panel to rotate around the first axis or around the second axis, and is rotatably connected to the second rotating arm (23), the first rotating arm (13) and the support column (44); The switching time interval is between the first time interval and the second time interval; The first axis and the second axis both pass through the first rotation support point, and the angle between the first axis and the second axis is greater than 0 degrees and less than 90 degrees.

[0013] The present invention provides a photovoltaic panel sunlight tracking method and device that overcomes at least one of the shortcomings of existing photovoltaic panel sunlight tracking technologies: complex structure, high cost, low efficiency, and short lifespan. The device achieves a simple structure, high tracking efficiency, low cost, and a long service life.

[0014] Other features and advantages of the present invention will be set forth in the description that follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of a method for tracking sunlight on photovoltaic panels according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a first rotation driving module for rotating about a first axis according to an embodiment of the present invention; Figure 3 A schematic diagram of a power switching module according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a second rotation drive module for rotating around a second axis according to an embodiment of the present invention.

[0016] In the figure, 11, first slider; 12, first push rod; 13, first rotating arm; 21. Second slider; 22. Second push rod; 23. Second rotating arm; 3. Photovoltaic panel rotating bracket; 31. First rotating support member; 32. Second rotating support member; 33. Third rotating support member; 4. Fixed frame; 41. Screw; 412. Right polished rod area; 413. Left polished rod area; 42. Slider puller; 43. Slide groove edge strip; 44. Support column; 45. Motor; 5. Sunlight tracking control module. Example

[0017] The present invention provides a photovoltaic panel sunlight tracking method and device, which are used to overcome at least one of the shortcomings of existing photovoltaic panel sunlight tracking technology, such as complex structure, high cost, low efficiency and short life.

[0018] The basic idea of ​​the present invention is: using the rotation support point O as the first rotation support point, the rotation support point A as the second rotation support point, and the line OA connecting the points O and A as the first axis; using the rotation support point O as the first rotation support point, the rotation support point B as the third rotation support point, and the line OB connecting the points O and B as the second axis; The first axis and the second axis both pass through the first rotation support point O, and the angle between the first axis and the second axis is greater than 0 degrees and less than 90 degrees.

[0019] During the morning sun rise, the photovoltaic panel rotates around the first axis. Compared with the single-axis sunlight tracking system that rotates around the same axis in the morning and afternoon, the angle between the first axis OA and the incident angle of sunlight provided by the present invention is closer to perpendicular, so the photovoltaic panel can obtain higher light power. As the sun sets in the afternoon, the photovoltaic panel rotates around the second axis. Compared to a single-axis sunlight tracking system that rotates around the same axis in the morning and afternoon, the angle between the second axis OB and the incident angle of sunlight provided by the present invention is closer to perpendicular, allowing the photovoltaic panel to obtain higher light power. Compared with the single-axis sunlight tracking system, the sunlight tracking system provided by the present invention has higher power generation efficiency; Compared with the dual-axis sunlight tracking system, the sunlight tracking system provided by the present invention has a simpler structure and lower cost.

[0020] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other in any manner.

[0021] The method and device provided by the present invention are described below with reference to the accompanying drawings.

[0022] Example 1: A method for tracking sunlight on photovoltaic panels The present invention provides a method for tracking sunlight on photovoltaic panels. Figure 1 As shown, the following steps are included: Step S110, using a first push rod to push the photovoltaic panel rotating bracket to rotate around a first axis within a first time interval; Step S120, soft-switching the power output to the first push rod to the second push rod within the switching time interval; Step S130, using a second push rod to push the photovoltaic panel rotating bracket to rotate around a second axis within a second time interval; The switching time interval is between the first time interval and the second time interval; The first axis and the second axis both pass through the first rotation support point, and the angle between the first axis and the second axis is greater than 0 degrees and less than 90 degrees.

[0023] The method provided in the embodiment of the present invention is used to adjust the orientation of the photosensitive surface of a photovoltaic panel according to the irradiation direction of sunlight, thereby increasing the irradiation power of sunlight received by the photovoltaic panel and thus increasing the power generation power of the photovoltaic panel.

[0024] The first time interval is within the morning time period of a day, for example, between 8:00 a.m. and 11:00 a.m.; The switching time interval is within the noon time period of a day, for example, between 11 am and 1 pm; The second time interval is in the afternoon of a day, for example, between 1 pm and 5 pm.

[0025] The method of pushing the photovoltaic panel rotating bracket to rotate around the first or second axis includes: Using a sunlight tracking control module to control the rotation mode and rotation parameters of the photovoltaic panel rotating bracket around the first or second axis; The rotation mode includes continuous rotation or step-by-step rotation; In the continuous rotation mode, the photovoltaic panel rotating bracket rotates continuously around the first or second axis from a starting angle to an ending angle; In the step-by-step rotation mode, the photovoltaic panel rotating bracket rotates around the first or second axis in N step angles from a starting angle to an ending angle, pauses for a dwell time after each step angle, and then rotates to the next step angle; The rotation parameters include at least one of a rotation start angle, a rotation start time, a rotation end angle, and a rotation end time; N is a natural number greater than 1.

[0026] The power output to the first push rod is softly switched to the second push rod within the switching time interval, wherein the soft switching means that there is a time sub-interval within the switching time interval, and the power is output to the first and second push rods at the same time within the time sub-interval.

[0027] Specifically, the first push rod is used to push the photovoltaic panel rotating bracket to rotate around the first axis within the first time interval, see Figure 2 As shown; The first rotation support point is also referred to as point O, which is the rotation center point of the first rotation support member (31). The first rotation support member (31) is used to realize the rotation connection between the photovoltaic panel rotation bracket (3) and the support column (44); The second rotation support point is also referred to as point A, which is the rotation center point of the second rotation support member (32). The second rotation support member (32) is used to realize the rotation connection between the photovoltaic panel rotation bracket (3) and the swing end of the second rotation arm (23); The third rotation support point is also referred to as point B, which is the rotation center point of the third rotation support member (33). The third rotation support member (33) is used to realize the rotation connection between the photovoltaic panel rotation bracket (3) and the swing end of the first rotation arm (13); The first axis is the line OA between points O and A; The process of using the first push rod to push the photovoltaic panel rotating bracket to rotate around the first axis includes: The first slider (11) is used to push the first push rod (12), and the first push rod (12) pushes the first rotating arm (13) to swing, one end of the first rotating arm (13) is rotatably connected to the fixed frame (4), and the other end of the first rotating arm (13) is connected to the third rotating support member (33); The first rotating arm (13) transmits the driving force to the photovoltaic panel rotating bracket (3) through the third rotating support member (33), causing the photovoltaic panel rotating bracket (3) to rotate around the first axis OA.

[0028] Specifically, the power output to the first push rod is softly switched to the second push rod within the switching time interval, see Figure 3 As shown; The first slider (11) is used to drive the first push rod (12), the second slider (21) is used to drive the first push rod (22), the screw rod (41) includes a threaded area and a polished rod area, the polished rod area is located at the left and right ends of the threaded area, the threaded area is used to drive the first slider (11) and the second slider (21) to move, and the polished rod area is used to realize the separation of the first slider (11) or the second slider (21) from the power; When the first slider (11) moves from right to left along the screw rod (41) to the polished rod area (413) at the left end of the threaded area, see Figure 2 As shown, and before the driver power is disengaged, push the polished rod area (412) located at the right end of the threaded area, see Figure 4 As shown, the second slider (21) is close to the threaded area on its left side. After the second slider (21) moves from right to left for a soft switching distance under the drive of the threaded area, the first slider (11) is separated from the drive of the threaded area and enters the polished rod area (413) at the left end of the threaded area. The second slider (21) in the polished rod area (412) at the right end of the threaded area is pushed toward the threaded area on the left side thereof, including: The first slider (11) pushes the slider shifter (42), and the slider shifter (42) pushes the second slider (21) toward the threaded area on its left side.

[0029] The slider member (42) is arranged in a slide groove included in the slide groove edge strip (43), and the first slider (11) and the second slider (21) both move along the slide groove.

[0030] Specifically, the second push rod is used to push the photovoltaic panel rotating bracket to rotate around the second axis during the second time interval, see Figure 4 As shown; The second axis is the line OB between points O and B; The process of using the second push rod to push the photovoltaic panel rotating bracket to rotate around the second axis includes: The second push rod (22) is pushed by the second slider (21), and the second push rod (22) pushes the second rotating arm (23) to swing, one end of the second rotating arm (23) is rotatably connected to the fixed frame (4), and the other end of the second rotating arm (23) is connected to the second rotating support member (32); The second rotating arm (23) transmits the driving force to the photovoltaic panel rotating bracket (3) through the second rotating support member (32), so that the photovoltaic panel rotating bracket (3) rotates around the second axis OB.

[0031] The photovoltaic panel rotating bracket includes any one of a flat plate shape, a triangle shape and a three-dimensional shape.

[0032] Use a power switch to switch power from the same driver between the first and second actuators.

[0033] The power output to the first push rod and the power output to the second push rod come from the same power source; In this embodiment, the power source is a motor.

[0034] The sunlight tracking control module controls the rotation direction of the motor, or controls the rotation speed and rotation direction of the motor; The motor drives the screw to rotate, and the threaded area on the screw drives the slider to move; The moving speed of the slider is controlled by controlling the rotation speed of the screw rod, thereby controlling the rotation speed of the photovoltaic panel rotating bracket; The angle of the photovoltaic panel rotation bracket can be adjusted by adjusting the position of the slider.

[0035] The method provided in this embodiment, wherein, The method of using the first push rod to push the photovoltaic panel rotating bracket to rotate around the first axis specifically includes: A first rotation support point is set at point O of the photovoltaic panel rotation support, and a second rotation support point is set at point A of the photovoltaic panel rotation support. The line connecting the rotation centers of the first and second rotation support points forms a first axis OA; The photovoltaic panel rotating bracket is rotatably connected to the swing end of the first rotating arm through the second rotating support point; The force-bearing end of the first push rod is rotationally connected to the first slider pushed by the screw rod, the output end of the first push rod is rotationally connected to the force-bearing point of the first rotating arm, the force-bearing point of the first rotating arm is located between its rotating connection end and its swing end, the rotating connection end of the first rotating arm is rotationally connected to the photovoltaic panel base bracket, and the swing of the first rotating arm enables the photovoltaic panel rotating bracket to rotate around the first axis OA; The step of using the second push rod to push the photovoltaic panel rotating bracket to rotate around the second axis specifically includes: A first rotation support point is set at point O of the photovoltaic panel rotation support, and a third rotation support point is set at point B of the photovoltaic panel rotation support. The line connecting the rotation center points of the first and third rotation support points constitutes a second axis OB; The photovoltaic panel rotating bracket is rotatably connected to the swing end of the second rotating arm through the third rotating support point; There is a rotational connection between the force-bearing end of the second push rod and the second slider pushed by the screw rod, and there is a rotational connection between the output end of the second push rod and the force point of the second rotating arm. The force point of the second rotating arm is located between its rotating connection end and its swinging end. There is a rotational connection between the rotating connection end of the second rotating arm and the photovoltaic panel base bracket. The swing of the second rotating arm realizes the rotation of the photovoltaic panel rotating bracket around the second axis OB.

[0036] The method provided in this embodiment, wherein, The method of setting a first rotation support point at point O of the photovoltaic panel rotation support and setting a second rotation support point at point A of the photovoltaic panel rotation support comprises: Use the photovoltaic panel frame as the photovoltaic panel rotation bracket, determine the O point position on the photovoltaic panel frame as the location for installing the first rotation support point, and determine the A point position on the photovoltaic panel frame as the location for installing the second rotation support point; or A frame or a flat plate connected to the photovoltaic panel frame is used as a photovoltaic panel rotation bracket, and point O is determined on the frame or flat plate as the location for installing the first rotation support point, and point A is determined on the frame or flat plate as the location for the second rotation support point; The method of setting a first rotation support point at point O of the photovoltaic panel rotation support and setting a third rotation support point at point B of the photovoltaic panel rotation support comprises: Use the photovoltaic panel frame as the photovoltaic panel rotation bracket, determine the position of point O on the photovoltaic panel frame as the position of the first rotation support point, and determine the position of point B on the photovoltaic panel frame as the position of the third rotation support point; or A frame or flat plate connected to the photovoltaic panel frame is used as a photovoltaic panel rotation bracket, and the position of point O on the frame or flat plate is determined as the position for installing the first rotation support point, and the position of point B on the frame or flat plate is determined as the position of the third rotation support point.

[0037] At least one of the first rotation support point, the second rotation support point, and the third rotation support point is a universal joint support point.

[0038] As a specific implementation manner of the first rotation support point, the first rotation support point uses a universal joint as a rotation support point component.

[0039] The rotatable part of the first rotation support point located at point O is connected to the photovoltaic panel frame or is connected to the photovoltaic panel through any one of a frame and a flat plate.

[0040] The frame includes a plane frame or a three-dimensional frame; The photovoltaic panel frame, the frame connecting the frame, and the flat plate all realize the structural connection between the photovoltaic panel and the rotation drive structure.

[0041] The non-rotatable part of the first rotation support point located at point O, such as the outer shell of the universal joint support point, is installed on the installation base of the photovoltaic panel through a support member.

[0042] The method provided in this embodiment, wherein, The soft switching of the power output to the first push rod to the second push rod within the switching time interval specifically includes: A threaded area is provided in the middle portion of the screw rod, and polished rod areas without threads are provided at the left and right ends of the threaded area respectively; Before the first time interval, the threaded area of ​​the lead screw drives the second slider corresponding to the second push rod to move to the polished rod area at the right end of the threaded area, thereby disconnecting the second slider from the driver power; In the first time interval, the threaded area is used to drive the first slider corresponding to the first push rod to move from right to left along the screw rod, and the second slider remains disconnected from the driver power in the polished rod area at the right end of the threaded area; During the switching time interval, before the first slider moves from right to left along the lead screw to the polished rod area at the left end of the threaded area and disengages from the driver's power, the second slider located in the polished rod area at the right end of the threaded area is pushed toward the threaded area on its left. After the second slider moves a soft switching distance from right to left under the drive of the threaded area, the first slider disengages from the drive of the threaded area and enters the polished rod area at the left end of the threaded area. In the second time interval, the threaded area is used to drive the second slider corresponding to the second push rod to move from right to left along the screw rod, and the first slider remains disconnected from the driver power in the polished rod area at the left end of the threaded area.

[0043] A polished rod area without threads is provided at each end of the lead screw, and the threads in the threaded area are used to move the slider that does not need to generate driving force into the polished rod area; During the first time interval, the slider member is used to disengage the second slider that pushes the second push rod from the threaded portion of the lead screw, so that the threaded portion of the lead screw drives the first slider to move, and the movement of the first slider drives the movement of the first push rod; In the second time interval, the slider is used to disengage the first slider that pushes the first push rod from the threaded portion of the screw rod, so that the threaded portion of the screw rod drives the second slider to move, and the movement of the second slider drives the second push rod to move.

[0044] The drive includes a lead screw, or a lead screw and a motor.

[0045] The method of using the threaded area to drive the first slider corresponding to the first push rod to move from right to left along the screw rod within the first time interval specifically includes: The first slider drives the first push rod, the first push rod drives the first rotating arm, and the first rotating arm drives the photovoltaic panel rotating bracket to rotate around the first axis OA.

[0046] In the second time interval, the threaded area is used to drive the second slider corresponding to the second push rod to move from right to left along the screw rod, specifically including: The second slider drives the second push rod, the second push rod drives the second rotating arm, and the second rotating arm drives the photovoltaic panel rotating bracket to rotate around the second axis OB.

[0047] Specifically, the driver is a screw rod (41).

[0048] The method provided in this embodiment, wherein, The switching time interval includes: before the first slider moves from right to left along the lead screw to the polished rod area at the left end of the threaded area and is disconnected from the driver power, pushing the second slider in the polished rod area at the right end of the threaded area toward the threaded area on its left side. Before the first slider moves from right to left along the lead screw to the polished rod area at the left end of the threaded area and disengages from the driver power, the first slider is used to push the slider shifter to push the second slider in the polished rod area at the right end of the threaded area toward the threaded area on its left, so that the second slider enters the thread-driven state.

[0049] The slider member includes any one of a push rod, a paddle and a spring.

[0050] The slider member is pushed by the first slider to drive the second slider in the polished rod area at the right end of the threaded area toward the threaded area on its left side. Then, the second slider moves to the left side of the threaded area under the action of the thread in the threaded area.

[0051] As a specific implementation of switching the driving force from the second push rod to the first push rod, the method includes: During the switching time interval, before the second slider moves from left to right along the lead screw to the polished rod area at the right end of the threaded area and is disengaged from the driver's power, the first slider in the polished rod area at the left end of the threaded area is pushed toward the threaded area to the right. After the first slider moves from left to right a soft switching distance under the drive of the threaded area, the second slider disengages from the drive of the threaded area and enters the polished rod area at the right end of the threaded area. The switching time interval includes: before the second slider moves from left to right along the lead screw to the polished rod area at the right end of the threaded area and is disconnected from the driver power, pushing the first slider in the polished rod area at the left end of the threaded area toward the threaded area on the right side thereof. Before the second slider moves from left to right along the screw rod to the polished rod area at the right end of the threaded area and disengages from the driver power, the second slider is used to push the slider shifter to push the first slider in the polished rod area at the left end of the threaded area toward the threaded area on its right, so that the first slider enters the thread-driven state.

[0052] Before the first time interval, the initial tilt angle of the photovoltaic panel is set to determine the starting angle of rotation of the photovoltaic panel around the first axis OA, specifically including: The first slider is driven to move from left to right to push the first push rod, and the first push rod drives the first rotating arm to rotate. The swing end of the first rotating arm drives the first axis OA of the photovoltaic panel rotating bracket to rotate, thereby driving the photovoltaic panel to rotate until the photovoltaic panel rotates around the first axis OA to a specific initial inclination angle; Specifically, the initial tilt angle is toward the incident direction of the morning sunlight to increase the sunlight radiation power received by the photovoltaic panel.

[0053] In a first time interval, as the direction of sunlight changes, the first slider is driven to move from right to left, pushing the photovoltaic panel to rotate around the first axis OA and gradually adjusting the inclination angle of the photovoltaic panel from the initial inclination angle to the inclination angle following the direction of sunlight incidence; During the noon time period, that is, during the switching time interval, the power switching is completed so that the photovoltaic panels face the direction of afternoon sunlight during the second time interval.

[0054] In the second time interval, as the sunlight direction changes, the second slider is driven to move from right to left, pushing the photovoltaic panel to rotate around the second axis OB and adjusting the inclination of the photovoltaic panel to follow the incident direction of afternoon sunlight.

[0055] After the second time interval, the second slider moves from left to right, driving the photovoltaic panel to reset to its minimum deflection angle. This minimum deflection angle corresponds to the switching time interval, typically the tilt angle of the photovoltaic panel at noon. Then, the initial tilt angle setting process begins, during which the first slider moves from left to right.

[0056] Specifically, the driver is a screw rod (41).

[0057] Example 2: An example of a photovoltaic panel sunlight tracking device The present invention provides a photovoltaic panel sunlight tracking device embodiment, comprising: Linear drive module, first rotation drive module, second rotation drive module, power switching module, photovoltaic panel rotation bracket (3); wherein, A linear drive module, used for providing a driving force for the photovoltaic panel rotating bracket (3), comprising a screw (41), a first slider (11) and a second slider (21); A first rotation drive module is used for driving the photovoltaic panel rotation bracket to rotate around a first axis using a first push rod (12) within a first time interval, and comprises a first push rod (12) and a first rotation arm (13); wherein one end of the first rotation arm (13) is rotationally connected to the fixed frame (4), and the other end is connected to the third rotation support member (33); A second rotation drive module is used for driving the photovoltaic panel rotation bracket to rotate around the second axis using a second push rod (22) within a second time interval, and comprises a second push rod (22) and a second rotation arm (23); wherein one end of the second rotation arm (23) is rotationally connected to the fixed frame (4), and the other end is connected to the second rotation support member (32); A power switching module, used for softly switching the power output to the first push rod (12) to the second push rod (22) within a switching time interval, comprising a first slider (11), a second slider (21) and a slider shifter (42); A photovoltaic panel rotating bracket (3) is used to drive the photovoltaic panel to rotate around the first axis or around the second axis, and is rotatably connected to the second rotating arm (23), the first rotating arm (13) and the support column (44); The switching time interval is between the first time interval and the second time interval; The first axis and the second axis both pass through the first rotation support point, and the angle between the first axis and the second axis is greater than 0 degrees and less than 90 degrees.

[0058] An embodiment of the present invention provides a photovoltaic panel sunlight tracking method for adjusting the orientation of the photosensitive surface of the photovoltaic panel according to the direction of sunlight, thereby increasing the sunlight radiation power received by the photovoltaic panel and thus increasing the power generation power of the photovoltaic panel.

[0059] The first time interval is within the morning time period of a day, for example, between 8:00 a.m. and 11:00 a.m.; The switching time interval is within the noon time period of a day, for example, between 11 am and 1 pm; The second time interval is in the afternoon of a day, for example, between 1 pm and 5 pm.

[0060] The power output to the first push rod is softly switched to the second push rod within the switching time interval, wherein the soft switching means that there is a time sub-interval within the switching time interval, and the power is output to the first and second push rods at the same time within the time sub-interval.

[0061] Specifically, the first push rod is used to push the photovoltaic panel rotating bracket to rotate around the first axis within the first time interval, see Figure 2 As shown; The first rotation support point is also referred to as point O, which is the rotation center point of the first rotation support member (31). The first rotation support member (31) is used to realize the rotation connection between the photovoltaic panel rotation bracket (3) and the support column (44); The second rotation support point is also referred to as point A, which is the rotation center point of the second rotation support member (32). The second rotation support member (32) is used to realize the rotation connection between the photovoltaic panel rotation bracket (3) and the swing end of the second rotation arm (23); The third rotation support point is also referred to as point B, which is the rotation center point of the third rotation support member (33). The third rotation support member (33) is used to realize the rotation connection between the photovoltaic panel rotation bracket (3) and the swing end of the first rotation arm (13); The first axis is the line OA between points O and A; The process of using the first push rod to push the photovoltaic panel rotating bracket to rotate around the first axis includes: The first slider (11) is used to push the first push rod (12), and the first push rod (12) pushes the first rotating arm (13) to swing, one end of the first rotating arm (13) is rotatably connected to the fixed frame (4), and the other end of the first rotating arm (13) is connected to the third rotating support member (33); The first rotating arm (13) transmits the driving force to the photovoltaic panel rotating bracket (3) through the third rotating support member (33), causing the photovoltaic panel rotating bracket (3) to rotate around the first axis OA.

[0062] Specifically, the power output to the first push rod is softly switched to the second push rod within the switching time interval, see Figure 3 As shown; The first slider (11) is used to drive the first push rod (12), the second slider (21) is used to drive the first push rod (22), the screw rod (41) includes a threaded area and a polished rod area, the polished rod area is located at the left and right ends of the threaded area, the threaded area is used to drive the first slider (11) and the second slider (21) to move, and the polished rod area is used to realize the separation of the first slider (11) or the second slider (21) from the power; When the first slider (11) moves from right to left along the screw rod (41) to the polished rod area (413) at the left end of the threaded area, see Figure 2 As shown, and before the driver power is disengaged, push the polished rod area (412) located at the right end of the threaded area, see Figure 4 As shown, the second slider (21) is close to the threaded area on its left side. After the second slider (21) moves from right to left for a soft switching distance under the drive of the threaded area, the first slider (11) is separated from the drive of the threaded area and enters the polished rod area (413) at the left end of the threaded area. The second slider (21) in the polished rod area (412) at the right end of the threaded area is pushed toward the threaded area on the left side thereof, including: The first slider (11) pushes the slider shifter (42), and the slider shifter (42) pushes the second slider (21) toward the threaded area on its left side.

[0063] The slider member (42) is arranged in a slide groove included in the slide groove edge strip (43), and the first slider (11) and the second slider (21) both move along the slide groove.

[0064] Specifically, the second push rod is used to push the photovoltaic panel rotating bracket to rotate around the second axis during the second time interval, see Figure 4 As shown; The second axis is the line OB between points O and B; The process of using the second push rod to push the photovoltaic panel rotating bracket to rotate around the second axis includes: The second push rod (22) is pushed by the second slider (21), and the second push rod (22) pushes the second rotating arm (23) to swing, one end of the second rotating arm (23) is rotatably connected to the fixed frame (4), and the other end of the second rotating arm (23) is connected to the second rotating support member (32); The second rotating arm (23) transmits the driving force to the photovoltaic panel rotating bracket (3) through the second rotating support member (32), so that the photovoltaic panel rotating bracket (3) rotates around the second axis OB.

[0065] The photovoltaic panel rotating bracket includes any one of a flat plate shape, a triangle shape and a three-dimensional shape.

[0066] Use a power switch to switch power from the same driver between the first and second actuators.

[0067] The power output to the first push rod and the power output to the second push rod come from the same power source; The angle of the photovoltaic panel rotation bracket can be adjusted by adjusting the position of the slider.

[0068] The device provided in this embodiment, wherein: The first rotation driving module performs an operation of using a first push rod (12) to push the photovoltaic panel rotation bracket to rotate around a first axis within a first time interval, specifically including: A first rotation support point is set at point O of the photovoltaic panel rotation support (3), a second rotation support point is set at point A of the photovoltaic panel rotation support, and a line connecting the rotation center points of the first and second rotation support points forms a first axis OA; The photovoltaic panel rotating bracket (3) is rotatably connected to the swing end of the first rotating arm via the second rotating support member (32); The force-bearing end of the first push rod is rotationally connected to the first slider pushed by the screw rod, the output end of the first push rod is rotationally connected to the force-bearing point of the first rotating arm, the force-bearing point of the first rotating arm is located between its rotating connection end and its swing end, the rotating connection end of the first rotating arm is rotationally connected to the photovoltaic panel base bracket, and the swing of the first rotating arm enables the photovoltaic panel rotating bracket to rotate around the first axis OA; The second rotation driving module performs the operation of using a second push rod (22) to push the photovoltaic panel rotation bracket to rotate around the second axis within a second time interval, specifically including: A first rotation support point is set at point O of the photovoltaic panel rotation support (3), and a third rotation support point is set at point B of the photovoltaic panel rotation support, and a line connecting the rotation center points of the first and third rotation support points forms a second axis OB; The photovoltaic panel rotating bracket (3) is rotationally connected to the swing end of the second rotating arm via a third rotating support member (33); The force-bearing end of the second push rod (22) is rotationally connected to the second slider pushed by the screw rod, the force-output end of the second push rod is rotationally connected to the force-bearing point of the second rotating arm, the force-bearing point of the second rotating arm is located between its rotation connection end and its swing end, the rotation connection end of the second rotating arm is rotationally connected to the photovoltaic panel base bracket, and the swing of the second rotating arm enables the photovoltaic panel rotating bracket to rotate around the second axis OB.

[0069] The method of setting a first rotation support point at point O of the photovoltaic panel rotation bracket (3) and setting a second rotation support point at point A of the photovoltaic panel rotation bracket specifically includes: A first rotation support member (31) is provided at point O of the photovoltaic panel rotation bracket (3), and a rotation center point of the first rotation support member (31) is used as a first rotation support point; A second rotation support member (32) is provided at point A of the photovoltaic panel rotation bracket, and the rotation center point of the second rotation support member (32) is used as a second rotation support point; A line connecting the rotation center points of the first and second rotation support points forms a first axis OA.

[0070] The third rotation support point is set at point B of the photovoltaic panel rotation bracket, specifically including: A third rotation support member (33) is provided at point B of the photovoltaic panel rotation bracket, and a rotation center point of the third rotation support member (33) is used as a third rotation support point; A line connecting the rotation center points of the first and third rotation support points forms a second axis OB.

[0071] The device provided in this embodiment, wherein: The first rotation driving module performs the operations of setting a first rotation support point at point O of the photovoltaic panel rotation bracket (3) and setting a second rotation support point at point A of the photovoltaic panel rotation bracket, specifically including: Using the photovoltaic panel frame as the photovoltaic panel rotation bracket (3), determining the positions for installing the first rotation support member (31) and the second rotation support member (32) on the photovoltaic panel frame, using the rotation center point of the first rotation support member (31) as the first rotation support point position, and using the rotation center point of the second rotation support member (32) as the second rotation support point position; or A frame or a flat plate connected to the photovoltaic panel frame is used as a photovoltaic panel rotation bracket (3), and positions for installing a first rotation support member (31) and a second rotation support member (32) are determined on the frame or the flat plate, with the rotation center point of the first rotation support member (31) serving as the first rotation support point position, and the rotation center point of the second rotation support member (32) serving as the second rotation support point position; The second rotation driving module performs the operations of setting a first rotation support point at point O of the photovoltaic panel rotation bracket and setting a third rotation support point at point B of the photovoltaic panel rotation bracket, including: Using the photovoltaic panel frame as the photovoltaic panel rotation bracket (3), determining the positions for installing the first rotation support member (31) and the third rotation support member (33) on the photovoltaic panel frame, using the rotation center point of the first rotation support member (31) as the first rotation support point position, and using the rotation center point of the third rotation support member (33) as the third rotation support point position; or A frame or a flat plate connected to the photovoltaic panel frame is used as a photovoltaic panel rotation bracket (3), and positions for installing a first rotation support member (31) and a third rotation support member (33) are determined on the frame or the flat plate. The rotation center point of the first rotation support member (31) is used as the first rotation support point position, and the rotation center point of the third rotation support member (33) is used as the third rotation support point position.

[0072] At least one of the first rotation support point, the second rotation support point, and the third rotation support point is a universal joint support point.

[0073] As a specific implementation manner of the first rotation support point, the first rotation support point uses a universal joint as a rotation support point component.

[0074] The rotatable part of the first rotation support point located at point O is connected to the photovoltaic panel frame or is connected to the photovoltaic panel through any one of a frame and a flat plate.

[0075] The frame includes a plane frame or a three-dimensional frame; The photovoltaic panel frame, the frame connecting the frame, and the flat plate all realize the structural connection between the photovoltaic panel and the rotation drive structure.

[0076] The non-rotatable part of the first rotation support point located at point O, such as the outer shell of the universal joint support point, is installed on the installation base of the photovoltaic panel through a support member.

[0077] The O point position is the first rotation center point position, the first rotation center point is the first rotation support point, and the first rotation center point position is the rotation center point position of the first rotation support member (31); The position of point A is the position of the second rotation center point, the second rotation center point is the second rotation support point, and the position of the second rotation center point is the position of the rotation center point of the second rotation support member (32); The position of point B is the position of the third rotation center point, the third rotation center point is the third rotation support point, and the position of the third rotation center point is the position of the rotation center point of the third rotation support member (33).

[0078] The device provided in this embodiment, wherein: The power switching module performs the operation of softly switching the power output to the first push rod (12) to the second push rod (22) within the switching time interval, specifically including: A threaded area is provided in the middle portion of the screw rod (41), and a right end polished rod area (412) and a left end polished rod area (413) without threads are provided at the left and right ends of the threaded area respectively; Before the first time interval, the threaded area of ​​the screw rod is used to drive the second slider (21) corresponding to the second push rod (22) to move to the right end polished rod area (412) at the right end of the threaded area, thereby disconnecting the second slider (21) from the driver power; In a first time interval, the threaded area is used to drive the first slider (11) corresponding to the first push rod (12) to move from right to left along the screw rod (41), and the second slider (21) remains disconnected from the driver power at the right end polished rod area (412) at the right end of the threaded area; In the switching time interval, before the first slider (11) moves from right to left along the screw rod (41) to the left end polished rod area (413) at the left end of the threaded area and is disengaged from the driver power, the second slider (21) located in the right end polished rod area (412) is pushed toward the threaded area on its left side. After the second slider (21) moves from right to left for a soft switching distance under the drive of the threaded area, the first slider (11) is disengaged from the drive of the threaded area and enters the left end polished rod area (413); In the second time interval, the threaded area is used to drive the second slider (21) corresponding to the second push rod (22) to move from right to left along the screw rod (41), and the first slider (11) remains disconnected from the driver power at the left end polished rod area (413) at the left end of the threaded area.

[0079] A polished rod area without threads is provided at each end of the lead screw, and the threads in the threaded area are used to move the slider that does not need to generate driving force into the polished rod area; During the first time interval, the slider member is used to disengage the second slider that pushes the second push rod from the threaded portion of the lead screw, so that the threaded portion of the lead screw drives the first slider to move, and the movement of the first slider drives the movement of the first push rod; In the second time interval, the slider is used to disengage the first slider that pushes the first push rod from the threaded portion of the screw rod, so that the threaded portion of the screw rod drives the second slider to move, and the movement of the second slider drives the second push rod to move.

[0080] The drive includes a lead screw, or a lead screw and a motor.

[0081] The method of using the threaded area to drive the first slider corresponding to the first push rod to move from right to left along the screw rod within the first time interval specifically includes: The first slider drives the first push rod, the first push rod drives the first rotating arm, and the first rotating arm drives the photovoltaic panel rotating bracket to rotate around the first axis OA.

[0082] In the second time interval, the threaded area is used to drive the second slider corresponding to the second push rod to move from right to left along the screw rod, specifically including: The second slider drives the second push rod, the second push rod drives the second rotating arm, and the second rotating arm drives the photovoltaic panel rotating bracket to rotate around the second axis OB.

[0083] Specifically, the driver is a screw rod (41).

[0084] The device provided in this embodiment, wherein: The power switching module performs the operation of pushing the second slider (21) located in the right end polished rod area (412) toward the threaded area on the left side thereof before the first slider (11) moves from right to left along the screw rod (41) to the left end polished rod area (413) at the left end of the threaded area and is disconnected from the driver power, specifically including: Before the first slider (11) moves from right to left along the lead screw (41) to the left end polished rod area (413) at the left end of the threaded area and is disconnected from the driver power, the first slider (11) is used to push the slider shifter (42) to push the second slider (21) in the polished rod area at the right end of the threaded area toward the threaded area on its left side, so that the second slider (21) enters a thread-driven state.

[0085] The slider shifter (42) comprises any one of a push rod, a shifter, and a spring.

[0086] The slider member is pushed by the first slider to drive the second slider in the polished rod area at the right end of the threaded area toward the threaded area on its left side. Then, the second slider moves to the left side of the threaded area under the action of the thread in the threaded area.

[0087] As a specific implementation of switching the driving force from the second push rod to the first push rod, the method includes: During the switching time interval, before the second slider moves from left to right along the lead screw to the polished rod area at the right end of the threaded area and is disengaged from the driver's power, the first slider in the polished rod area at the left end of the threaded area is pushed toward the threaded area to the right. After the first slider moves from left to right a soft switching distance under the drive of the threaded area, the second slider disengages from the drive of the threaded area and enters the polished rod area at the right end of the threaded area. The switching time interval includes: before the second slider moves from left to right along the lead screw to the polished rod area at the right end of the threaded area and is disconnected from the driver power, pushing the first slider in the polished rod area at the left end of the threaded area toward the threaded area on the right side thereof. Before the second slider moves from left to right along the screw rod to the polished rod area at the right end of the threaded area and disengages from the driver power, the second slider is used to push the slider shifter to push the first slider in the polished rod area at the left end of the threaded area toward the threaded area on its right, so that the first slider enters the thread-driven state.

[0088] Before the first time interval, the initial tilt angle of the photovoltaic panel is set to determine the starting angle of rotation of the photovoltaic panel around the first axis OA, specifically including: The first slider is driven to move from left to right to push the first push rod, and the first push rod drives the first rotating arm to rotate. The swing end of the first rotating arm drives the first axis OA of the photovoltaic panel rotating bracket to rotate, thereby driving the photovoltaic panel to rotate until the photovoltaic panel rotates around the first axis OA to a specific initial inclination angle; Specifically, the initial tilt angle is toward the incident direction of the morning sunlight to increase the sunlight radiation power received by the photovoltaic panel.

[0089] In a first time interval, as the direction of sunlight changes, the first slider is driven to move from right to left, pushing the photovoltaic panel to rotate around the first axis OA and gradually adjusting the inclination angle of the photovoltaic panel from the initial inclination angle to the inclination angle following the direction of sunlight incidence; During the noon time period, that is, during the switching time interval, the power switching is completed so that the photovoltaic panels face the direction of afternoon sunlight during the second time interval.

[0090] In the second time interval, as the sunlight direction changes, the second slider is driven to move from right to left, pushing the photovoltaic panel to rotate around the second axis OB and adjusting the inclination of the photovoltaic panel to follow the incident direction of afternoon sunlight.

[0091] After the second time interval, the second slider moves from left to right, driving the photovoltaic panel to reset to its minimum deflection angle. This minimum deflection angle corresponds to the switching time interval, typically the tilt angle of the photovoltaic panel at noon. Then, the initial tilt angle setting process begins, during which the first slider moves from left to right.

[0092] Specifically, the driver is a screw rod (41).

[0093] The device provided in this embodiment further includes a sunlight tracking control module (5), The sunlight tracking control module (5) includes a motor drive control circuit, which is electrically connected to the motor (45) and is used to perform the following operations: Controlling the photovoltaic panel rotating bracket (3) to rotate around the first or second axis in either a continuous manner or a stepwise manner; Controlling the rotation parameters of the photovoltaic panel rotation bracket (3); The rotation parameter includes at least one of a rotation start angle, a rotation start time, a rotation end angle, and a rotation end time.

[0094] In the continuous rotation mode, the photovoltaic panel rotating bracket rotates continuously around the first or second axis from a starting angle to an ending angle; In the step-by-step rotation mode, the photovoltaic panel rotating bracket rotates around the first or second axis in N step angles from the starting angle to the ending angle, pauses for a dwell time after each step angle, and then rotates to the next step angle; N is a natural number greater than 1.

[0095] In this embodiment, the power source is a motor (45).

[0096] The sunlight tracking control module (5) controls the rotation direction of the motor, or controls the rotation speed and rotation direction of the motor; The motor (45) drives the screw rod (41) to rotate, and the threaded area on the screw rod (41) drives the slider to move; The moving speed of the slider is controlled by controlling the rotation speed of the screw rod (41), thereby controlling the rotation speed of the photovoltaic panel rotation bracket (3).

[0097] The method provided by the embodiment of the present invention can be implemented in whole or in part through software instructions and / or hardware circuits; the modules or units included in the device provided by the embodiment of the present invention can be implemented using electronic components and corresponding structural parts.

[0098] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any person skilled in the art of the present invention may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope of the present invention. However, the scope of protection of the present invention shall be determined by the scope of the appended claims.

[0099] The method and device provided in the embodiments of the present invention overcome at least one of the shortcomings of existing photovoltaic panel sunlight tracking technology: complex structure, high cost, low efficiency, and short lifespan. They offer a simple structure, high tracking efficiency, low cost, and a long service life.

Claims

1. A photovoltaic panel sunlight tracking method comprising the following steps: Using a first push rod to push the photovoltaic panel rotating bracket to rotate around a first axis within a first time interval; The power output to the first push rod is softly switched to the second push rod within the switching time interval; Using a second push rod to push the photovoltaic panel rotating bracket to rotate around a second axis within a second time interval; The switching time interval is between the first time interval and the second time interval; The first axis and the second axis both pass through the first rotation support point, and the angle between the first axis and the second axis is greater than 0 degrees and less than 90 degrees.

2. The method according to claim 1, wherein The method of using the first push rod to push the photovoltaic panel rotating bracket to rotate around the first axis specifically includes: A first rotation support point is set at point O of the photovoltaic panel rotation support, and a second rotation support point is set at point A of the photovoltaic panel rotation support. The line connecting the rotation centers of the first and second rotation support points forms a first axis OA; The photovoltaic panel rotating bracket is rotatably connected to the swing end of the first rotating arm through the second rotating support point; The force-bearing end of the first push rod is rotationally connected to the first slider pushed by the screw rod, the output end of the first push rod is rotationally connected to the force-bearing point of the first rotating arm, the force-bearing point of the first rotating arm is located between its rotating connection end and its swing end, the rotating connection end of the first rotating arm is rotationally connected to the photovoltaic panel base bracket, and the swing of the first rotating arm enables the photovoltaic panel rotating bracket to rotate around the first axis OA; The step of using the second push rod to push the photovoltaic panel rotating bracket to rotate around the second axis specifically includes: A first rotation support point is set at point O of the photovoltaic panel rotation support, and a third rotation support point is set at point B of the photovoltaic panel rotation support. The line connecting the rotation center points of the first and third rotation support points constitutes a second axis OB; The photovoltaic panel rotating bracket is rotatably connected to the swing end of the second rotating arm through the third rotating support point; There is a rotational connection between the force-bearing end of the second push rod and the second slider pushed by the screw rod, and there is a rotational connection between the output end of the second push rod and the force point of the second rotating arm. The force point of the second rotating arm is located between its rotating connection end and its swinging end. There is a rotational connection between the rotating connection end of the second rotating arm and the photovoltaic panel base bracket. The swing of the second rotating arm realizes the rotation of the photovoltaic panel rotating bracket around the second axis OB.

3. The method according to claim 2, wherein The method of setting a first rotation support point at point O of the photovoltaic panel rotation support and setting a second rotation support point at point A of the photovoltaic panel rotation support comprises: Use the photovoltaic panel frame as the photovoltaic panel rotation bracket, determine the O point position on the photovoltaic panel frame as the location for installing the first rotation support point, and determine the A point position on the photovoltaic panel frame as the location for installing the second rotation support point; or A frame or a flat plate connected to the photovoltaic panel frame is used as a photovoltaic panel rotation bracket, and point O is determined on the frame or flat plate as the location for installing the first rotation support point, and point A is determined on the frame or flat plate as the location for the second rotation support point; The method of setting a first rotation support point at point O of the photovoltaic panel rotation support and setting a third rotation support point at point B of the photovoltaic panel rotation support comprises: Use the photovoltaic panel frame as the photovoltaic panel rotation bracket, determine the position of point O on the photovoltaic panel frame as the position of the first rotation support point, and determine the position of point B on the photovoltaic panel frame as the position of the third rotation support point; or A frame or flat plate connected to the photovoltaic panel frame is used as a photovoltaic panel rotation bracket, and the position of point O on the frame or flat plate is determined as the position for installing the first rotation support point, and the position of point B on the frame or flat plate is determined as the position of the third rotation support point.

4. The method according to claim 1, wherein The soft switching of the power output to the first push rod to the second push rod within the switching time interval specifically includes: A threaded area is provided in the middle portion of the screw rod, and polished rod areas without threads are provided at the left and right ends of the threaded area respectively; Before the first time interval, the threaded area of ​​the lead screw drives the second slider corresponding to the second push rod to move to the polished rod area at the right end of the threaded area, thereby disconnecting the second slider from the driver power; In the first time interval, the threaded area is used to drive the first slider corresponding to the first push rod to move from right to left along the screw rod, and the second slider remains disconnected from the driver power in the polished rod area at the right end of the threaded area; During the switching time interval, before the first slider moves from right to left along the lead screw to the polished rod area at the left end of the threaded area and disengages from the driver's power, the second slider located in the polished rod area at the right end of the threaded area is pushed toward the threaded area on its left. After the second slider moves a soft switching distance from right to left under the drive of the threaded area, the first slider disengages from the drive of the threaded area and enters the polished rod area at the left end of the threaded area. In the second time interval, the threaded area is used to drive the second slider corresponding to the second push rod to move from right to left along the screw rod, and the first slider remains disconnected from the driver power in the polished rod area at the left end of the threaded area.

5. The method according to claim 4, wherein The switching time interval includes: before the first slider moves from right to left along the lead screw to the polished rod area at the left end of the threaded area and is disconnected from the driver power, pushing the second slider in the polished rod area at the right end of the threaded area toward the threaded area on its left side. Before the first slider moves from right to left along the lead screw to the polished rod area at the left end of the threaded area and disengages from the driver power, the first slider is used to push the slider shifter to push the second slider in the polished rod area at the right end of the threaded area toward the threaded area on its left, so that the second slider enters the thread-driven state.

6. A photovoltaic panel sunlight tracking device comprising: Linear drive module, first rotation drive module, second rotation drive module, power switching module, photovoltaic panel rotation bracket (3); wherein, A linear drive module, used for providing a driving force for the photovoltaic panel rotation bracket (3), comprising a screw (41), a first slider (11) and a second slider (21); A first rotation drive module is used for driving the photovoltaic panel rotation bracket to rotate around a first axis using a first push rod (12) within a first time interval, and comprises a first push rod (12) and a first rotation arm (13); wherein one end of the first rotation arm (13) is rotationally connected to the fixed frame (4), and the other end is connected to the third rotation support member (33); A second rotation drive module is used for driving the photovoltaic panel rotation bracket to rotate around the second axis using a second push rod (22) within a second time interval, and comprises a second push rod (22) and a second rotation arm (23); wherein one end of the second rotation arm (23) is rotationally connected to the fixed frame (4), and the other end is connected to the second rotation support member (32); A power switching module, used for softly switching the power output to the first push rod (12) to the second push rod (22) within a switching time interval, comprising a first slider (11), a second slider (21) and a slider shifter (42); A photovoltaic panel rotating bracket (3) is used to drive the photovoltaic panel to rotate around the first axis or around the second axis, and is rotatably connected to the second rotating arm (23), the first rotating arm (13) and the support column (44); The switching time interval is between the first time interval and the second time interval; The first axis and the second axis both pass through the first rotation support point, and the angle between the first axis and the second axis is greater than 0 degrees and less than 90 degrees.

7. The device according to claim 6, wherein The first rotation driving module performs an operation of using a first push rod (12) to push the photovoltaic panel rotation bracket to rotate around a first axis within a first time interval, specifically including: A first rotation support point is set at point O of the photovoltaic panel rotation support (3), a second rotation support point is set at point A of the photovoltaic panel rotation support, and a line connecting the rotation center points of the first and second rotation support points forms a first axis OA; The photovoltaic panel rotating bracket (3) is rotatably connected to the swing end of the first rotating arm via the second rotating support member (32); The force-bearing end of the first push rod is rotationally connected to the first slider pushed by the screw rod, the output end of the first push rod is rotationally connected to the force-bearing point of the first rotating arm, the force-bearing point of the first rotating arm is located between its rotating connection end and its swing end, the rotating connection end of the first rotating arm is rotationally connected to the photovoltaic panel base bracket, and the swing of the first rotating arm enables the photovoltaic panel rotating bracket to rotate around the first axis OA; The second rotation driving module performs the operation of using a second push rod (22) to push the photovoltaic panel rotation bracket to rotate around the second axis within a second time interval, specifically including: A first rotation support point is set at point O of the photovoltaic panel rotation support (3), and a third rotation support point is set at point B of the photovoltaic panel rotation support, and a line connecting the rotation center points of the first and third rotation support points forms a second axis OB; The photovoltaic panel rotating bracket (3) is rotationally connected to the swing end of the second rotating arm via a third rotating support member (33); The force-bearing end of the second push rod (22) is rotationally connected to the second slider pushed by the screw rod, the force-output end of the second push rod is rotationally connected to the force-bearing point of the second rotating arm, the force-bearing point of the second rotating arm is located between its rotation connection end and its swing end, the rotation connection end of the second rotating arm is rotationally connected to the photovoltaic panel base bracket, and the swing of the second rotating arm enables the photovoltaic panel rotating bracket to rotate around the second axis OB.

8. The device according to claim 7, wherein The first rotation driving module performs the operations of setting a first rotation support point at point O of the photovoltaic panel rotation bracket (3) and setting a second rotation support point at point A of the photovoltaic panel rotation bracket, specifically including: Using the photovoltaic panel frame as the photovoltaic panel rotation bracket (3), determining the positions for installing the first rotation support member (31) and the second rotation support member (32) on the photovoltaic panel frame, using the rotation center point of the first rotation support member (31) as the first rotation support point position, and using the rotation center point of the second rotation support member (32) as the second rotation support point position; or A frame or a flat plate connected to the photovoltaic panel frame is used as a photovoltaic panel rotation bracket (3), and positions for installing a first rotation support member (31) and a second rotation support member (32) are determined on the frame or the flat plate, with the rotation center point of the first rotation support member (31) serving as the first rotation support point position, and the rotation center point of the second rotation support member (32) serving as the second rotation support point position; The second rotation driving module performs the operations of setting a first rotation support point at point O of the photovoltaic panel rotation bracket and setting a third rotation support point at point B of the photovoltaic panel rotation bracket, including: Using the photovoltaic panel frame as the photovoltaic panel rotation bracket (3), determining the positions for installing the first rotation support member (31) and the third rotation support member (33) on the photovoltaic panel frame, using the rotation center point of the first rotation support member (31) as the first rotation support point position, and using the rotation center point of the third rotation support member (33) as the third rotation support point position; or A frame or a flat plate connected to the photovoltaic panel frame is used as a photovoltaic panel rotation bracket (3), and positions for installing a first rotation support member (31) and a third rotation support member (33) are determined on the frame or the flat plate. The rotation center point of the first rotation support member (31) is used as the first rotation support point position, and the rotation center point of the third rotation support member (33) is used as the third rotation support point position.

9. The device according to claim 6, wherein The power switching module performs the operation of softly switching the power output to the first push rod (12) to the second push rod (22) within the switching time interval, specifically including: A threaded area is provided in the middle portion of the screw rod (41), and a right end polished rod area (412) and a left end polished rod area (413) without threads are provided at the left and right ends of the threaded area respectively; Before the first time interval, the threaded area of ​​the screw rod is used to drive the second slider (21) corresponding to the second push rod (22) to move to the right end polished rod area (412) at the right end of the threaded area, thereby disconnecting the second slider (21) from the driver power; In a first time interval, the threaded area is used to drive the first slider (11) corresponding to the first push rod (12) to move from right to left along the screw rod (41), and the second slider (21) remains disconnected from the driver power at the right end polished rod area (412) at the right end of the threaded area; In the switching time interval, before the first slider (11) moves from right to left along the screw rod (41) to the left end polished rod area (413) at the left end of the threaded area and is disengaged from the driver power, the second slider (21) located in the right end polished rod area (412) is pushed toward the threaded area on its left side. After the second slider (21) moves from right to left for a soft switching distance under the drive of the threaded area, the first slider (11) is disengaged from the drive of the threaded area and enters the left end polished rod area (413); In the second time interval, the threaded area is used to drive the second slider (21) corresponding to the second push rod (22) to move from right to left along the screw rod (41), and the first slider (11) remains disconnected from the driver power at the left end polished rod area (413) at the left end of the threaded area.

10. The device according to claim 9, wherein The power switching module performs the operation of pushing the second slider (21) located in the right end polished rod area (412) toward the threaded area on the left side thereof before the first slider (11) moves from right to left along the screw rod (41) to the left end polished rod area (413) at the left end of the threaded area and is disconnected from the driver power, specifically including: Before the first slider (11) moves from right to left along the lead screw (41) to the left end polished rod area (413) at the left end of the threaded area and is disconnected from the driver power, the first slider (11) is used to push the slider shifter (42) to push the second slider (21) in the polished rod area at the right end of the threaded area toward the threaded area on its left side, so that the second slider (21) enters a thread-driven state.

11. The device according to claim 6, further comprising a sunlight tracking control module (5), The sunlight tracking control module (5) includes a motor drive control circuit, which is electrically connected to the motor (45) and is used to perform the following operations: Controlling the photovoltaic panel rotating bracket (3) to rotate around the first or second axis in either a continuous manner or a stepwise manner; Controlling the rotation parameters of the photovoltaic panel rotation bracket (3); The rotation parameter includes at least one of a rotation start angle, a rotation start time, a rotation end angle, and a rotation end time.

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