Photovoltaic module, control method thereof and photovoltaic system

Abstract

The invention provides a photovoltaic module, a control method thereof and a photovoltaic system. The photovoltaic assembly comprises a plurality of photovoltaic panels, all the photovoltaic panels are sequentially connected end to end to form an annular polyhedron, and the photovoltaic panels can rotate with the rotating axis of the annular polyhedron as the axis. According to the photovoltaic module and the control method thereof, and the photovoltaic system provided by the invention, the plurality of photovoltaic panels are annularly arranged, and the photovoltaic panels can rotate by taking the annular central axis as the axis, so that different photovoltaic panels can be switched to a state of being irradiated by sunlight, and the photovoltaic panels can be timely and alternately cooled when the temperature rise is ultrahigh; therefore, the photovoltaic panel irradiated by sunlight is always at the optimal photoelectric conversion temperature, and the power generation efficiency of the photovoltaic module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solar energy equipment, and in particular to a photovoltaic component and a control method thereof, and a photovoltaic system. Background Art

[0002] As we all know, the photovoltaic system is a device that converts solar energy into electrical energy. It is known as the most ideal energy source, with the characteristics of safety and reliability, inexhaustible source, not limited by resource distribution area, and green environmental protection. The photovoltaic system generates electricity by collecting direct sunlight through photovoltaic panels, but as the direct sunlight time increases, the temperature of the photovoltaic panel surface gradually rises. Studies have shown that the most efficient operating temperature of photovoltaic panels is about 25°C. After exceeding this temperature, the efficiency of photovoltaic panels will decrease by 0.3-0.5% for every 1°C increase in temperature. This is because when the temperature of the photovoltaic panel rises, its open circuit voltage will drop significantly, causing the working point to be cheaper, so the electron transfer rate will slow down and the generated electricity will decrease. On the other hand, the inverter will limit the output power of the system at high temperature, and even trigger safety protection and stop working, causing a sharp drop in photoelectric conversion efficiency.

[0003] However, the photovoltaic panels in the prior art are all fixed on the ground and are always in direct sunlight. Direct sunlight will cause the temperature of the photovoltaic panels to rise, resulting in excessive surface temperature rise of the photovoltaic panels, affecting the power generation efficiency and rapid aging of the components of the photovoltaic panels. Summary of the invention

[0004] In order to solve the technical problem in the prior art that photovoltaic panels are always under direct sunlight and the temperature is too high, resulting in low power generation efficiency and short service life of components, a photovoltaic assembly and a control method and a photovoltaic system are provided for adjusting the position of photovoltaic panels to achieve rotation of different photovoltaic panels to reduce the temperature of the photovoltaic panels.

[0005] A photovoltaic assembly comprises a plurality of photovoltaic panels, all of which are connected end to end in sequence to form an annular polyhedron, and all of which can rotate around the rotation axis of the annular polyhedron.

[0006] The annular polyhedron has at least three side surfaces, all of which are connected end to end in sequence, and at least one photovoltaic panel is disposed on each of the side surfaces.

[0007] The photovoltaic assembly further comprises a driving structure, at least one photovoltaic panel is connected to the driving structure, and the driving structure is capable of adjusting the orientations of all the photovoltaic panels.

[0008] The photovoltaic assembly further includes a controller, which is capable of acquiring actual state parameters of all the photovoltaic panels, and the controller is electrically connected to the driving structure.

[0009] The photovoltaic assembly further includes a temperature detection mechanism, which is disposed on the photovoltaic panel and is electrically connected to the controller.

[0010] The photovoltaic assembly has a temperature adjustment mode. When the real-time temperature of the photovoltaic panel receiving solar energy in the photovoltaic assembly is greater than a first preset temperature value, the controller controls the driving structure to work.

[0011] The photovoltaic assembly further comprises a timing mechanism, in which a first time interval is pre-stored, and the timing mechanism is electrically connected to the controller.

[0012] The photovoltaic assembly has a time adjustment mode, and the controller controls the driving structure to work according to a first time interval.

[0013] The rotation axis of the annular polyhedron has an angle with respect to the horizontal plane.

[0014] The photovoltaic assembly further includes a cleaning structure, which is disposed on one side of the annular polyhedron and can clean the photovoltaic panel located on the side and / or bottom of the annular polyhedron.

[0015] A control method for the photovoltaic assembly as described above comprises:

[0016] Determine whether the working parameters of the photovoltaic modules meet the preset conditions;

[0017] If so, the photovoltaic module is controlled to rotate.

[0018] The photovoltaic assembly includes a temperature detection mechanism, the temperature detection mechanism is arranged on the photovoltaic panel, the preset condition includes a first preset temperature value s1, the photovoltaic assembly has a temperature control mode, and the control method further includes:

[0019] When the photovoltaic module is switched to the temperature control mode:

[0020] Acquire the real-time temperature s0 of the photovoltaic panel receiving solar energy in the photovoltaic assembly, and compare s0 with s1;

[0021] If s0≥s1, the photovoltaic assembly is controlled to rotate.

[0022] The photovoltaic assembly includes a timing mechanism, the preset condition includes a first time interval, and after obtaining the real-time temperature s0 of the photovoltaic panel receiving solar energy in the photovoltaic assembly and comparing s0 with s1, the method further includes:

[0023] If s0<s1, then obtain the time interval t0 after the last rotation of the photovoltaic component, and compare t0 with the first time interval t1;

[0024] If t0≥t1, the photovoltaic assembly is controlled to rotate.

[0025] The photovoltaic assembly includes a timing mechanism, the preset condition includes a first time interval, the photovoltaic assembly has a time control mode, and the control method further includes:

[0026] When the photovoltaic module switches to the time control mode:

[0027] Obtaining a time interval t0 after the last rotation of the photovoltaic assembly, and comparing t0 with the first time interval t1;

[0028] If t0≥t1, the photovoltaic assembly is controlled to rotate.

[0029] The photovoltaic assembly package has a temperature control mode and a time control mode, the preset condition includes a first preset temperature value s1, and the control method further includes:

[0030] Obtaining a temperature rise rate v0 of the photovoltaic panel in the photovoltaic assembly that receives solar energy, and comparing v0 with a preset temperature rise rate v1;

[0031] If v0≥v1 and the real-time temperature of the photovoltaic panel s0≥s1, the photovoltaic assembly is controlled to switch to the time control mode;

[0032] If v0<v1 or s0<s1, the photovoltaic assembly is controlled to switch to the temperature control mode.

[0033] A photovoltaic system comprises the photovoltaic component mentioned above or a control method using the photovoltaic component mentioned above.

[0034] The photovoltaic module and its control method and photovoltaic system provided by the present invention connect multiple photovoltaic panels end to end in sequence to form an annular polyhedron, and enable the photovoltaic panel to rotate with the rotation axis of the annular polyhedron as the axis, so that different photovoltaic panels can be switched to the state of being irradiated by sunlight, so that the photovoltaic panels can be rotated and cooled in time when the temperature rise is too high, so that the photovoltaic panels irradiated by sunlight are always at the optimal photoelectric conversion temperature, thereby improving the power generation efficiency of the photovoltaic module and avoiding the problem of accelerated aging of components in the photovoltaic module under high temperature for a long time. In addition, during the rotation of the photovoltaic panel, some photovoltaic panels will be tilted relative to the ground or even toward the ground, and the dust layer on the surface of the photovoltaic panel will fall under the action of gravity, so that the photovoltaic module can achieve a better self-cleaning effect, further improving the working efficiency of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a photovoltaic module provided by an embodiment of the present invention;

[0036] Figure 2 Another schematic diagram of the structure of a photovoltaic module provided by an embodiment of the present invention;

[0037] Figure 3 A control flow chart of a temperature control mode of a photovoltaic module provided by an embodiment of the present invention;

[0038] Figure 4 A control flow chart of a time control mode of a photovoltaic module provided by an embodiment of the present invention;

[0039] In the figure:

[0040] 1. Photovoltaic panel; 2. Temperature detection mechanism; 3. Timing mechanism. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying 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.

[0042] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0044] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The photovoltaic system is a device that converts solar energy into electrical energy. It is known as the most ideal energy source. It is safe and reliable, has an inexhaustible source, is not restricted by the geographical distribution of resources, and is green and environmentally friendly. The photovoltaic system generates electricity by collecting direct sunlight through photovoltaic panels. However, as the direct sunlight time increases, the temperature on the surface of the photovoltaic panels gradually rises. Studies have shown that the most efficient operating temperature for photovoltaic panels is around 25°C. After exceeding this temperature, the efficiency of the photovoltaic panel will decrease by 0.3-0.5% for every 1°C increase in temperature. This is because when the temperature of the photovoltaic panel rises, its open circuit voltage will drop significantly, causing the working point to be cheaper, so the electron transfer rate will slow down and the generated electrical energy will decrease. On the other hand, the inverter will limit the output power of the system at high temperatures, and even trigger safety protection and stop working, causing a sharp drop in photoelectric conversion efficiency. However, the photovoltaic panels in the prior art are all fixedly set on the ground, and the photovoltaic panels are always in a state of direct sunlight. The direct sunlight will cause the temperature of the photovoltaic panels to rise, resulting in excessive surface temperature rise of the photovoltaic panels, affecting the power generation efficiency, and the rapid aging of the components of the photovoltaic panels. To this end, the present application provides a method such as Figures 1 to 4The photovoltaic assembly shown includes a plurality of photovoltaic panels 1, all of which are connected end to end in sequence to form an annular polyhedron, and all of which can rotate with the rotation axis of the annular polyhedron as the axis. Multiple photovoltaic panels 1 are connected end to end in sequence to form an annular polyhedron, and the photovoltaic panels can rotate with the rotation axis of the annular polyhedron as the axis, so that different photovoltaic panels 1 can be switched to a state of being irradiated by sunlight, that is, at least one of the photovoltaic panels 1 receives solar energy and at least one of the photovoltaic panels 1 stops receiving solar energy, so that the photovoltaic panels 1 can be rotated and cooled in time when the temperature is too high, so that the photovoltaic panels 1 irradiated by sunlight are always at the optimal photoelectric conversion temperature, thereby improving the power generation efficiency of the photovoltaic assembly and avoiding the problem of accelerated aging of components in the photovoltaic assembly under high temperature for a long time. Moreover, during the rotation of the photovoltaic panel 1, part of the photovoltaic panel 1 will be tilted relative to the ground or even toward the ground, and the ash layer on the surface of the photovoltaic panel 1 will fall under the action of gravity, so that the photovoltaic assembly can achieve a better self-cleaning effect, further improving the working efficiency of the photovoltaic assembly.

[0047] As an embodiment, the annular polyhedron has at least three sides, all of which are connected end to end in sequence, and at least one photovoltaic panel 1 is arranged on each side. When the photovoltaic module is working, the side of the annular polyhedron located at the top of the photovoltaic module can face the sun, and all photovoltaic panels 1 in this plane can receive solar energy to ensure the working efficiency of the photovoltaic panel 1. When the photovoltaic panel 1 is rotated, the annular polyhedron can be controlled to rotate according to the set angle, so that the photovoltaic panel 1 can be oriented reliably. Among them, the number of edges of the polygon is at least three, and the shape formed by all photovoltaic panels 1 is a polyhedron. For example, the number of edges of the polygon can be three, and the shape of the annular polyhedron formed by all photovoltaic panels 1 is a trihedron; or, the number of edges of the polygon can be four, and the shape of the annular polyhedron formed by all photovoltaic panels 1 is a tetrahedron; or, the number of edges of the polygon can be five, and the shape of the annular polyhedron formed by all photovoltaic panels 1 is a pentahedron; or, the number of edges of the polygon can be six, and the shape of the annular polyhedron formed by all photovoltaic panels 1 is a hexahedron. The more edges of the polygon, the more faces of the formed polyhedron, and the better the rotary cooling effect of the photovoltaic panel 1.

[0048] The photovoltaic assembly also includes a driving structure, at least one photovoltaic panel 1 is connected to the driving structure, and the driving structure can adjust the orientation of all the photovoltaic panels 1. The driving structure is used to provide power for the rotation of the photovoltaic panels 1 to ensure reliable operation of the photovoltaic assembly.

[0049] The photovoltaic assembly also includes a controller, which can obtain the actual state parameters of all the photovoltaic panels 1, and the controller is electrically connected to the driving structure. By obtaining the actual state parameters of the photovoltaic panels 1, it is judged whether the photovoltaic panel 1 currently irradiated by sunlight can work normally. When the photovoltaic panel 1 cannot work normally (for example, the temperature is too high), the controller can control the driving structure to work, thereby driving the photovoltaic panel 1 to rotate, ensuring the structural reliability and working reliability of the photovoltaic assembly.

[0050] Optionally, the photovoltaic assembly further includes a temperature detection mechanism 2, which is disposed on the photovoltaic panel 1 and is electrically connected to the controller. The temperature detection mechanism 2 is used to obtain the real-time temperature of the photovoltaic panel 1, and the real-time temperature of the photovoltaic panel 1 is used to determine whether the photovoltaic panel 1 can work normally and whether it will affect the life of the components. The controller can make corresponding adjustments to ensure the structural reliability and working reliability of the photovoltaic assembly. The temperature detection mechanism 2 corresponds to the photovoltaic panel 1 one by one, and the temperature detection mechanism 2 is disposed on the backlight surface of the photovoltaic panel 1 to avoid the problem that the temperature detection mechanism 2 is easily damaged by sunlight.

[0051] The photovoltaic assembly has a temperature adjustment mode. When the real-time temperature of the photovoltaic panel 1 receiving solar energy in the photovoltaic assembly is greater than the first preset temperature value, it indicates that the temperature of the photovoltaic panel 1 is too high and will affect the working efficiency of the photovoltaic panel 1 and the structural reliability of the components. The controller controls the driving structure to work and rotates the photovoltaic panel 1 so that the photovoltaic panel 1 with too high temperature rotates to the side or bottom of the photovoltaic assembly, while other photovoltaic panels 1 move to the position of the original photovoltaic panel 1 to receive solar energy. At this time, the photovoltaic panel 1 with too high temperature will not receive solar energy but will gradually cool down, thereby ensuring the structural reliability of the photovoltaic panel 1. There are still photovoltaic panels 1 to receive solar energy, thereby ensuring the working efficiency of the photovoltaic panel 1.

[0052] Optionally, the photovoltaic assembly further includes a timing mechanism 3, in which a first time interval is pre-stored, and the timing mechanism 3 is electrically connected to the controller. The timing mechanism 3 is used to control the controller so that the driving structure works at the first time interval as a cycle, and the photovoltaic panel 1 can also rotate at the first time interval, thereby ensuring the structural reliability and working reliability of the photovoltaic assembly.

[0053] The photovoltaic component has a time adjustment mode, and the controller controls the driving structure to work according to a first time interval, that is, when the time interval from the last rotation of the photovoltaic component is the first time interval, the controller can control the driving structure to work, thereby driving the photovoltaic panel 1 to rotate, thereby ensuring the structural reliability and working reliability of the photovoltaic component.

[0054] The rotation axis of the annular polyhedron has an angle relative to the horizontal plane. The angle is used to make the side of the polyhedron formed by the photovoltaic component in an inclined state, so that the photovoltaic panel 1 can reliably face the sun, thereby improving the ability of the photovoltaic panel 1 to receive sunlight and the power generation efficiency of the photovoltaic component.

[0055] The photovoltaic module also includes a cleaning structure, which is arranged on one side of the annular polyhedron, and the cleaning structure can clean the photovoltaic panel 1 located on the side and / or bottom of the annular polyhedron. The cleaning structure is used to clean the photovoltaic panel 1 that is not exposed to sunlight, thereby improving the cleaning efficiency of the photovoltaic panel 1 and improving the working efficiency of the photovoltaic panel 1 the next time the photovoltaic panel 1 is switched to a position exposed to sunlight. Moreover, the photovoltaic panel 1 is located on the side or bottom of the photovoltaic module, and the cleaning liquid, water and other substances used by the cleaning structure to clean the photovoltaic panel 1 can be more smoothly separated from the photovoltaic panel 1, thereby avoiding the cleaning liquid and water remaining on the photovoltaic panel 1 and affecting the working efficiency and structural reliability of the photovoltaic panel 1, thereby improving the working reliability of the photovoltaic module.

[0056] A control method for the photovoltaic assembly as described above comprises:

[0057] Determine whether the working parameters of the photovoltaic module meet the preset conditions, where the working parameters of the photovoltaic module can be the temperature of the photovoltaic panel 1, the last rotation time value of the photovoltaic module, etc., and the corresponding preset parameters exist in the preset conditions for comparison;

[0058] If so, the photovoltaic assembly is controlled to rotate so that all photovoltaic panels 1 are switched in rotation to ensure the working reliability of the photovoltaic assembly.

[0059] The photovoltaic assembly includes a temperature detection mechanism 2, and the temperature detection mechanism 2 is arranged on the photovoltaic panel 1. The preset condition includes a first preset temperature value s1. The photovoltaic assembly has a temperature control mode. The control method further includes:

[0060] When the photovoltaic module is switched to the temperature control mode:

[0061] Obtaining the real-time temperature s0 of the photovoltaic panel 1 receiving solar energy in the photovoltaic assembly, and comparing s0 with s1;

[0062] If s0≥s1, it indicates that the temperature of the photovoltaic panel 1 is too high and will affect the working efficiency of the photovoltaic panel 1 and the structural reliability of the components. The photovoltaic assembly is controlled to rotate and the photovoltaic panel 1 is rotated so that the photovoltaic panel 1 with too high a temperature rotates to the side or bottom of the photovoltaic assembly, while other photovoltaic panels 1 move to the position of the original photovoltaic panel 1 to receive solar energy. At this time, the photovoltaic panel 1 with too high a temperature will not receive solar energy but will gradually cool down, thereby ensuring the structural reliability of the photovoltaic panel 1. There are still photovoltaic panels 1 that receive solar energy to ensure the working efficiency of the photovoltaic panel 1.

[0063] The photovoltaic assembly includes a timing mechanism 3, the preset condition includes a first time interval, and after obtaining the real-time temperature s0 of the photovoltaic panel 1 receiving solar energy in the photovoltaic assembly and comparing s0 with s1, it also includes:

[0064] If s0<s1, it indicates that the photovoltaic panel 1 is in a normal working state at this time, then the time interval t0 after the last rotation of the photovoltaic component is obtained, and t0 is compared with the first time interval t1;

[0065] If t0≥t1, the photovoltaic assembly is controlled to rotate, and dust and the like that may be accumulated on the photovoltaic panel 1 are cleaned by rotation, thereby ensuring the working efficiency of the photovoltaic assembly.

[0066] Optionally, the photovoltaic assembly includes a timing mechanism 3, the preset condition includes a first time interval, the photovoltaic assembly has a time control mode, and the control method further includes:

[0067] When the photovoltaic module switches to the time control mode:

[0068] Obtaining a time interval t0 after the last rotation of the photovoltaic assembly, and comparing t0 with the first time interval t1;

[0069] If t0≥t1, the photovoltaic assembly is controlled to rotate, thereby driving the photovoltaic panel 1 to rotate, thereby ensuring the structural reliability and working reliability of the photovoltaic assembly.

[0070] In order to avoid frequent flipping of photovoltaic modules and affecting the working efficiency of photovoltaic modules, the photovoltaic module package has a temperature control mode and a time control mode, the preset condition includes a first preset temperature value s1, and the control method also includes:

[0071] Obtaining a temperature rise rate v0 of the photovoltaic panel 1 receiving solar energy in the photovoltaic assembly, and comparing v0 with a preset temperature rise rate v1;

[0072] If v0≥v1 and the real-time temperature of the photovoltaic panel 1 s0≥s1, the photovoltaic assembly is controlled to switch to the time control mode. At this time, although the temperature of the photovoltaic panel 1 exceeds the first preset temperature s1, the frequent rotation of the photovoltaic panel 1 can be avoided, and the working efficiency of the photovoltaic assembly can also be guaranteed;

[0073] If v0<v1 or s0<s1, the photovoltaic assembly is controlled to switch to the temperature control mode. At this time, the photovoltaic panel 1 will not frequently flip due to frequent excessive temperature, and the rotation of the photovoltaic panel 1 can be controlled according to the temperature;

[0074] By judging the temperature rise rate v0, the photovoltaic modules can be in the optimal working mode, thereby maximizing the working efficiency of the photovoltaic modules.

[0075] For example, the photovoltaic panel 1 has the best photoelectric conversion efficiency at a temperature of 25°C. For every 1°C increase in the surface temperature of the photovoltaic panel 1, its photoelectric conversion efficiency decreases by about 0.5%. Therefore, at 50°C, the photoelectric efficiency of the photovoltaic panel 1 decreases by 25%. When installing a photovoltaic system in a vast, unobstructed desert area, the specific heat capacity of sand is small and the seasonal temperature difference is large. If the photovoltaic module uses the temperature control mode and sets the surface of the photovoltaic panel 1 to flip at 50°C, in autumn, the ambient temperature in the desert area is 10-20°C. At this time, the photovoltaic module can always be in a high photoelectric conversion efficiency. However, due to the large amount of sand and dust in the desert area, only using the temperature control mode in this environment, the photovoltaic panel 1 rarely flips, which will cause sand and dust to accumulate on the surface of the photovoltaic panel 1 and affect the photoelectric conversion efficiency, and even produce a hot spot effect to damage the photovoltaic panel 1. Therefore, a time control logic is added to the temperature control mode. Every first time interval t1, the photovoltaic panel 1 is rotated, so that the sand and dust on the surface of the photovoltaic panel 1 falls with gravity, which can achieve the purpose of self-cleaning. In summer, the daytime temperature in the desert reaches 50-70℃, and the photovoltaic panel 1 receiving sunlight will soon reach 50℃. Therefore, if the logic of flipping at 50℃ is followed, the photovoltaic panel 1 will be in a state of continuous rotation, which not only consumes the energy generated by the photovoltaic panel 1, but also cannot guarantee the working efficiency of the photovoltaic panel 1. Therefore, the temperature control mode is not applicable in this season, and the time control mode should be used to ensure that the photovoltaic panel 1 can be flipped less and the working efficiency of the photovoltaic panel 1 is guaranteed. That is, the photovoltaic module can switch to different control modes according to different seasons and different temperatures to achieve the optimal design of photovoltaic system photoelectric conversion.

[0076] A photovoltaic system comprises the photovoltaic component mentioned above or a control method using the photovoltaic component mentioned above.

[0077] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A photovoltaic module, characterized in that: It comprises a plurality of photovoltaic panels (1), all of the photovoltaic panels (1) are connected end to end in sequence to form an annular polyhedron, and all of the photovoltaic panels (1) can rotate about the rotation axis of the annular polyhedron.

2. The photovoltaic module according to claim 1, characterized in that: The annular polyhedron has at least three side faces, all of which are connected end to end in sequence, and at least one photovoltaic panel (1) is arranged on each of the side faces.

3. The photovoltaic module according to claim 1, characterized in that: The photovoltaic assembly further comprises a driving structure, at least one of the photovoltaic panels (1) is connected to the driving structure, and the driving structure is capable of adjusting the orientation of all the photovoltaic panels (1).

4. The photovoltaic module according to claim 3, characterized in that: The photovoltaic assembly also includes a controller, which is capable of acquiring actual state parameters of all the photovoltaic panels (1), and the controller is electrically connected to the driving structure.

5. The photovoltaic module according to claim 4, characterized in that: The photovoltaic assembly further comprises a temperature detection mechanism (2), wherein the temperature detection mechanism (2) is arranged on the photovoltaic panel (1), and the temperature detection mechanism (2) is electrically connected to the controller.

6. The photovoltaic module according to claim 5, characterized in that: The photovoltaic assembly has a temperature regulation mode, and when the real-time temperature of the photovoltaic panel (1) receiving solar energy in the photovoltaic assembly is greater than a first preset temperature value, the controller controls the driving structure to operate.

7. The photovoltaic module according to claim 4, characterized in that: The photovoltaic assembly further comprises a timing mechanism (3), in which a first time interval is pre-stored, and the timing mechanism (3) is electrically connected to the controller.

8. The photovoltaic module according to claim 7, characterized in that: The photovoltaic assembly has a time adjustment mode, and the controller controls the driving structure to work according to a first time interval.

9. The photovoltaic module according to claim 1, characterized in that: The rotation axis of the annular polyhedron has an angle with respect to the horizontal plane.

10. The photovoltaic module according to claim 1, characterized in that: The photovoltaic assembly also includes a cleaning structure, which is arranged on one side of the annular polyhedron, and the cleaning structure is capable of cleaning the photovoltaic panel (1) located on the side and / or bottom of the annular polyhedron.

11. A control method for a photovoltaic assembly according to any one of claims 1 to 10, characterized in that: include: Determine whether the working parameters of the photovoltaic modules meet the preset conditions; If so, the photovoltaic module is controlled to rotate.

12. The control method of a photovoltaic assembly according to claim 11, characterized in that: The photovoltaic assembly comprises a temperature detection mechanism (2), the temperature detection mechanism (2) is arranged on the photovoltaic panel (1), the preset condition comprises a first preset temperature value s1, the photovoltaic assembly has a temperature control mode, and the control method further comprises: When the photovoltaic module is switched to the temperature control mode: Acquiring a real-time temperature s0 of the photovoltaic panel (1) receiving solar energy in the photovoltaic assembly, and comparing s0 with s1; If s0≥s1, the photovoltaic assembly is controlled to rotate.

13. The control method of a photovoltaic assembly according to claim 12, characterized in that: The photovoltaic assembly comprises a timing mechanism (3), the preset condition comprises a first time interval, and after obtaining the real-time temperature s0 of the photovoltaic panel (1) receiving solar energy in the photovoltaic assembly and comparing s0 with s1, the method further comprises: If s0<s1, then obtain the time interval t0 after the last rotation of the photovoltaic component, and compare t0 with the first time interval t1; If t0≥t1, the photovoltaic assembly is controlled to rotate.

14. The control method of a photovoltaic assembly according to claim 11, characterized in that: The photovoltaic assembly comprises a timing mechanism (3), the preset condition comprises a first time interval, the photovoltaic assembly has a time control mode, and the control method further comprises: When the photovoltaic module switches to the time control mode: Obtaining a time interval t0 after the last rotation of the photovoltaic assembly, and comparing t0 with the first time interval t1; If t0≥t1, the photovoltaic assembly is controlled to rotate.

15. The control method of a photovoltaic assembly according to claim 11, characterized in that: The photovoltaic assembly package has a temperature control mode and a time control mode, the preset condition includes a first preset temperature value s1, and the control method further includes: Obtaining a temperature rise rate v0 of the photovoltaic panel (1) in the photovoltaic assembly that receives solar energy, and comparing v0 with a preset temperature rise rate v1; If v0≥v1 and the real-time temperature of the photovoltaic panel (1) s0≥s1, the photovoltaic assembly is controlled to switch to a time control mode; If v0<v1 or s0<s1, the photovoltaic assembly is controlled to switch to the temperature control mode.

16. A photovoltaic system, characterized in that: A control method comprising the photovoltaic assembly according to any one of claims 1 to 10 or applying the photovoltaic assembly according to any one of claims 11 to 15.

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