Concentrating photovoltaic module and roof concentrating photovoltaic device

Abstract

The invention discloses a concentrating photovoltaic module and a roof concentrating photovoltaic device. The concentrating photovoltaic module comprises a module frame, a plurality of CPV module units, a plurality of rotating mechanisms and a driving mechanism. The CPV module units are in a strip shape, and the CPV module units are arranged in parallel at intervals in the x-axis direction and installed in an area defined by the assembly frame. One end of each CPV module unit is correspondingly connected with one rotating mechanism, the driving mechanism is in transmission connection with the rotating mechanisms so as to drive the rotating mechanisms to rotate, and the rotating mechanisms drive the correspondingly connected CPV module units to rotate around the axes of the corresponding CPV module units. According to the concentrating photovoltaic module, each CPV module unit can be dynamically rotated according to the real-time change of the sun angle so as to realize the adjustment of the light receiving angle, the overall height change of the concentrating photovoltaic module in the rotation process is very small, and the requirement of low-height installation of a roof is met.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cell technology, and in particular to a concentrated photovoltaic module and a rooftop concentrated photovoltaic device. Background Technology

[0002] As the core device for solar-to-electricity conversion, the performance of solar cells directly determines the efficiency and economy of solar energy utilization. Solar cells need to effectively absorb sunlight to trigger the photoelectric effect, thereby completing energy conversion. Therefore, light absorption efficiency and focusing effect are key factors affecting their performance. With the continuous iteration of photovoltaic technology, concentrated photovoltaic (CPV) modules have shown significant advantages due to their unique technological approach, gradually becoming a research hotspot in the photovoltaic field.

[0003] CPV modules use optical elements to efficiently focus sunlight onto smaller, high-efficiency photovoltaic cells. On one hand, this focusing effect significantly improves the conversion efficiency of the photovoltaic cells, allowing more energy to be output per unit area. On the other hand, the focusing principle reduces the need for expensive photovoltaic cell materials, effectively lowering the material cost of the module. Among existing CPV modules, the design using transmission-type Fresnel lenses as the optical focusing element is the most common. These lenses can precisely focus sunlight onto high-efficiency chip cells such as gallium arsenide (GaAs). Combined with high-precision solar tracking brackets, the module angle can be adjusted in real time according to the sun's position, ensuring the cells are always in optimal light-receiving condition and maximizing light energy utilization.

[0004] In residential building rooftop photovoltaic systems, crystalline silicon solar cells still dominate due to their mature technology and relatively controllable costs. These modules are typically fixed to the roof using a flat-lay installation method, which is simple in structure and convenient to install. However, they have several unavoidable limitations: First, the conversion efficiency ceiling is relatively low, and the power generation per unit area is limited. To obtain sufficient electricity, a large area of ​​solar panels needs to be laid, resulting in a high roof space occupancy rate, making them particularly unsuitable for households with small roof areas or diverse usage needs. Second, crystalline silicon solar panels are relatively heavy, placing stringent requirements on the load-bearing capacity of the roof structure. Older buildings or houses with weak roof structures require additional reinforcement and renovation, significantly increasing installation costs and construction difficulty. Third, flat-lay installation cannot achieve direct sunlight, and the efficiency of receiving sunlight is significantly affected by time of day and season, further limiting the power generation potential of limited roof space.

[0005] While CPV components can improve efficiency and save space through real-time tracking, traditional CPV tracking brackets have compatibility defects. Narrow roof space restricts bracket rotation and easily causes interference. The brackets are also tall and bulky, which not only fails to meet the requirements for low-height installation but also poses safety hazards due to insufficient wind and snow resistance, while increasing the load-bearing pressure on the roof.

[0006] Therefore, in response to the needs of rooftop photovoltaic systems, there is an urgent need to develop a new type of concentrating photovoltaic module. Summary of the Invention

[0007] In view of this, this application provides a concentrating photovoltaic module and a rooftop concentrating photovoltaic device to solve the problem that the tracking structure of traditional concentrating photovoltaic modules in the prior art is difficult to adapt to low-height installation requirements.

[0008] To achieve one or more of the above objectives or other objectives, the first aspect of this application provides a concentrated photovoltaic module, including a module frame, a plurality of CPV module units, a plurality of rotating mechanisms and a drive mechanism;

[0009] The CPV module unit is strip-shaped, and several CPV module units are arranged in parallel at intervals along the x-axis and installed in the area enclosed by the component frame; one end of each CPV module unit is connected to a corresponding rotating mechanism, and the driving mechanism is connected to each rotating mechanism to drive each rotating mechanism to rotate, and each rotating mechanism drives the corresponding connected CPV module unit to rotate around the axis of the corresponding CPV module unit itself.

[0010] Furthermore, each of the CPV module units includes several CPV sub-modules; within one of the CPV module units, several of the CPV sub-modules are arranged along the y-axis direction perpendicular to the x-axis.

[0011] Furthermore, each of the CPV module units includes a unit frame, a plurality of Fresnel lenses, and a plurality of chip batteries. The unit frame includes a top cover, a bottom panel, two side panels, and two sealing panels. The top cover has a plurality of mounting positions along the y-axis, and the plurality of Fresnel lenses are correspondingly mounted in each of the mounting positions. The chip batteries are disposed at positions on the bottom panel that correspond one-to-one with each of the mounting positions. The two side panels are respectively disposed on both sides of the unit frame along the y-axis, and the two sealing panels are respectively disposed on both sides of the unit frame along the x-axis. The Fresnel lenses and the corresponding chip batteries form a CPV sub-module.

[0012] Furthermore, the side panel of the unit frame is provided with a mounting protrusion on the outer side wall, and the component frame is provided with mounting holes corresponding to the positions of each CPV module unit. The mounting protrusion and the corresponding mounting hole are fitted together to assemble the CPV module unit in the area enclosed by the component frame.

[0013] Furthermore, at least one side of the component frame along the y-axis direction is provided with a mounting groove extending along the x-axis direction. One end of the mounting protrusion of each CPV module unit extends into the mounting groove. The rotating mechanism is a chain gear, which is fixedly mounted on the protruding end of the mounting protrusion. The chain gears corresponding to each CPV module unit are connected by chain meshing. The driving mechanism is located outside the mounting groove and is connected to at least one of the chain gears in a transmission manner.

[0014] Furthermore, both ends of the CPV module unit are provided with sealed bearings, which are installed on the mounting protrusions at the corresponding ends, and the outer ring of the sealed bearing is fixed to the inner wall of the mounting hole of the component frame.

[0015] Furthermore, within one of the CPV module units, each of the chip batteries is electrically connected via cables laid on the bottom panel, and the cables are led out from the CPV module unit through wiring ports opened on the side panel of the CPV module unit.

[0016] Furthermore, adjacent CPV module units are electrically connected via outgoing cables.

[0017] Furthermore, a preset gap is left between the bottom panel of the unit frame of each CPV module unit and the component frame, and the size of the preset gap is adapted to the maximum swing amount during the rotation of the CPV module unit.

[0018] A second aspect of this application provides a rooftop concentrating photovoltaic device, including a base, a horizontal angle adjustment device, and the aforementioned concentrating photovoltaic module. The concentrating photovoltaic module is mounted on the base via the horizontal angle adjustment device, which drives the concentrating photovoltaic module to rotate horizontally.

[0019] Implementing the embodiments of this application will have the following beneficial effects:

[0020] The concentrated photovoltaic (CPV) module and rooftop concentrated photovoltaic (PV) device of this application include a module frame, a plurality of CPV module units, a plurality of rotating mechanisms, and a drive mechanism. The CPV module units are strip-shaped, and the plurality of CPV module units are arranged in parallel at intervals along the x-axis and installed in the area enclosed by the module frame. One end of each CPV module unit is connected to a corresponding rotating mechanism, and the drive mechanism is connected to each rotating mechanism to drive each rotating mechanism to rotate. Each rotating mechanism drives the corresponding connected CPV module unit to rotate around its own axis. Thus, the concentrated photovoltaic module of this application can dynamically rotate each CPV module unit according to the real-time change of the solar angle to adjust the light-receiving angle. Moreover, the overall height of the concentrated photovoltaic module changes very little during the rotation process, which meets the requirements for low-height rooftop installation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] in:

[0023] Figure 1 This is a schematic diagram of the structure of a concentrated photovoltaic module in one embodiment;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of a concentrated photovoltaic module after removing the module frame;

[0025] Figure 3 This is a schematic diagram of the structure of a unit frame in one embodiment;

[0026] Figure 4 This is a schematic diagram of the structure of a CPV module unit in one embodiment;

[0027] Figure 5 This is a schematic diagram of the component border structure in one embodiment;

[0028] Figure 6 This is a schematic diagram of the Fresnel lens in one embodiment;

[0029] Figure 7 This is a schematic diagram of the structure of a rooftop concentrating photovoltaic device in one embodiment;

[0030] Figure 8 This is a schematic diagram of the structure of the base of a rooftop concentrating photovoltaic device in one embodiment;

[0031] Figure 9 This is a schematic diagram of the horizontal angle adjustment device of a rooftop concentrating photovoltaic system in one embodiment.

[0032] Explanation of the attached drawing numbers:

[0033] 1: Component frame; 11: Mounting hole; 12: Mounting slot; 2: CPV module unit; 21: CPV sub-module; 22: Unit frame; 221: Top cover; 2211: Mounting position; 222: Bottom panel; 223: Side panel; 224: Mounting protrusion; 225: Sealing panel; 23: Fresnel lens; 24: Chip battery; 25: Cable; 3: Rotation mechanism; 4: Drive mechanism; 5: Chain; 6: Sealed bearing;

[0034] 100: Concentrated photovoltaic module; 200: Base; 300: Horizontal angle adjustment device; 301: Horizontal rotation drive motor; 302: Rotary transmission mechanism. Detailed Implementation

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application, are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0038] Reference Figure 1 and Figure 2 The embodiments of this application illustrate a concentrated photovoltaic module, including a module frame 1, a plurality of CPV module units 2, a plurality of rotating mechanisms 3 and a driving mechanism 4;

[0039] The CPV module unit 2 is strip-shaped, and several CPV module units 2 are arranged in parallel at intervals along the x-axis and installed in the area enclosed by the component frame 1; one end of each CPV module unit 2 is connected to a corresponding rotating mechanism 3, and the driving mechanism 4 is connected to each rotating mechanism 3 to drive each rotating mechanism 3 to rotate, and each rotating mechanism 3 drives the corresponding connected CPV module unit 2 to rotate around its own axis.

[0040] In this embodiment, the component frame 1 has a rectangular frame structure, and its height must be greater than the height of the CPV module unit 2 to allow sufficient space for installation and rotation. For example, when the height of the CPV module unit 2 is 5cm, the height of the component frame 1 can be set to 15cm. Under the premise of meeting the movement requirements of internal components, the height of the component frame 1 can be optimized and reduced as much as possible, thereby reducing the space occupation in low-height roof installation scenarios and adapting to more roof structure conditions. The component frame 1 is preferably made of aluminum alloy, which has both lightweight and high strength characteristics, reducing the overall weight of the component to reduce the load-bearing pressure on the roof, while ensuring structural stability.

[0041] Several CPV module units 2 are elongated strips, their lengths matching the y-axis dimensions of the component frame 1, ensuring the module units are securely mounted within the frame's enclosure. The CPV module units 2 are arranged parallel and spaced along the x-axis, with a pre-defined spacing between adjacent units. This spacing is designed to ensure that each CPV module unit 2 does not obstruct the others within the full range of its rotational trajectory, guaranteeing that each module's light-receiving surface receives ample sunlight. Simultaneously, this spacing can be minimized to maximize the module density along the x-axis, allowing for more power generation units to be installed on a small rooftop, significantly increasing power generation per unit area. Each CPV module unit 2 is detachable via mounting structures at both ends, facilitating future maintenance, replacement, and repair. One end of each CPV module unit 2 is connected to a rotating mechanism 3 in a one-to-one correspondence. Each rotating mechanism 3 forms a synchronous transmission connection through a transmission component. Specifically, the transmission component can be selected from chain drive, gear drive or synchronous belt drive, etc., according to the actual application scenario. In this embodiment, chain drive is preferred, which can ensure that the angle adjustment of each CPV module unit 2 remains synchronous and consistent. The drive mechanism 4 is a motor.

[0042] Existing concentrated photovoltaic (CPV) modules typically employ an overall angle adjustment method, where a large support structure rotates the entire module to track the light. To prevent interference with surrounding structures during rotation, the support structure must be designed to be sufficiently tall. This not only results in a taller overall device, occupying a significant amount of roof space, but also reduces wind and snow resistance due to the higher center of gravity, while significantly increasing the roof's load-bearing capacity. This makes it difficult to meet the installation requirements of low-height, lightweight roofs. In contrast, the embodiment of this application adopts a design where each CPV module unit is independently adjustable. Each CPV module unit 2 rotates around its own extension axis to adjust the light-receiving angle. The module unit itself is relatively short, and only its own angle changes during rotation. The overall module height does not need to be increased to avoid the rotation trajectory, resulting in minimal height change. Therefore, the module frame 1 can be designed to be shorter, meeting the core requirement of low-height roof installation. At the same time, the lower overall height effectively reduces wind resistance, improves the structural stability of the device in outdoor environments, and reduces the roof's load-bearing burden.

[0043] During operation, the drive mechanism 4 receives instructions from the external controller and outputs torque, which drives each rotating mechanism 3 to rotate synchronously through a preset transmission component. This, in turn, drives the corresponding connected CPV module unit 2 to rotate around its own axis of extension, with a rotation angle range of 0° to 360° (0° in the horizontal position). The rotation angle can be dynamically adjusted according to real-time changes in the solar angle, ensuring that its light-receiving surface remains perpendicular to sunlight, maximizing light absorption efficiency. This effectively solves the core defects of traditional crystalline silicon modules with flat installations, such as inability to track light and low light-receiving efficiency. Furthermore, through the above structural design, the concentrated photovoltaic module of this application, while retaining the high conversion efficiency advantage of CPV technology, successfully achieves low-height and lightweight installation requirements, fully meeting the usage requirements of rooftop scenarios.

[0044] In some specific embodiments, reference is made to Figure 1 and Figure 4 Each CPV module unit 2 includes several CPV sub-modules 21. Within a CPV module unit 2, the CPV sub-modules 21 are arranged along a y-axis direction perpendicular to the x-axis. Each CPV sub-module 21 is the smallest power generation unit within the CPV module unit 2. Adjacent CPV sub-modules 21 are closely connected within a CPV module unit 2. The number of sub-modules is determined by the y-axis length of the CPV module unit 2. For example, when the y-axis length of the CPV module unit 2 is 83.2 cm, 16 CPV sub-modules 21 can be arranged along this direction. Within a CPV module unit 2, each CPV sub-module 21 rotates synchronously around its own axis to track the light, eliminating the need for a separate drive structure for each sub-module and simplifying the overall structure.

[0045] In some specific embodiments, reference is made to Figure 3 and Figure 4 Each CPV module unit 2 includes a unit frame 22, a plurality of Fresnel lenses 23, and a plurality of chip batteries 24. The unit frame 22 includes an upper cover plate 221, a bottom panel 222, two side panels 223, and two sealing panels 225. The upper cover plate 221 has a plurality of mounting positions 2211 along the y-axis direction, and the plurality of Fresnel lenses 23 are correspondingly installed in each of the mounting positions 2211. The bottom panel 222 is provided at the positions corresponding to each of the mounting positions 2211. The two side panels 223 are respectively provided on both sides of the unit frame 22 along the y-axis direction, and the two sealing panels 225 are respectively provided on both sides of the unit frame 22 along the x-axis direction. The Fresnel lenses 23 and the corresponding chip batteries 24 form a CPV sub-module 21.

[0046] In this embodiment, the unit frame 22 includes an upper cover plate 221, a bottom panel 222, and two side panels 223. The upper cover plate 221 and the bottom panel 222 are arranged parallel to each other, and the spacing between them is adapted to the height of the CPV sub-module 21. The two side panels 223 are respectively vertically connected to the upper cover plate 221 and the bottom panel 222 on both sides in the y-axis direction. The unit frame 22 also includes sealing panels 225 on both sides in the x-axis direction, so that the unit frame 22 forms an overall closed frame structure. The unit frame 22 can be made of engineering plastics, plexiglass, or other materials.

[0047] The number of mounting positions 2211 on the upper cover 221 corresponds one-to-one with the number of Fresnel lenses 23 and chip batteries 24, and the inner diameter of the mounting positions 2211 is adapted to the edge contour of the Fresnel lenses 23. (Refer to...) Figure 6 Several Fresnel lenses 23 are embedded in the respective mounting positions 2211 and fixed in place using sealant. The sealant fills the gap between the lens and the inner wall of the mounting position, effectively preventing rainwater and dust from entering the unit frame 22 and improving sealing performance. The Fresnel lenses 23 are transmission-type optical lenses, which can efficiently focus incident sunlight onto the chip battery 24, with a focusing magnification of up to 500 times, significantly improving the light energy density of the chip battery 24.

[0048] The chip battery 24 can be glued and fixed to the bottom panel 222. The chip battery 24 is preferably a gallium arsenide high-efficiency photovoltaic cell, which can fully utilize the focusing effect of the Fresnel lens 23 to achieve efficient power generation. The central axis of the chip battery 24 is aligned with the focusing axis of the corresponding Fresnel lens 23. Two side panels 223 are respectively located on both sides of the unit frame 22 along the y-axis direction. Wiring channels are provided on the side panels 223 for easy subsequent cable connections.

[0049] In some specific embodiments, reference is made to Figure 1 , Figure 4 and Figure 5 The side panel 223 of the unit frame 22 is provided with a mounting protrusion 224. The component frame 1 is provided with mounting holes 11 corresponding to the positions of each CPV module unit 2. The mounting protrusion 224 is fitted with the corresponding mounting hole 11 to assemble the CPV module unit 2 into the area enclosed by the component frame 1.

[0050] In some specific embodiments, mounting protrusions 224 are integrally formed on the outer wall of the side panel 223 of the unit frame 22. The mounting protrusions 224 are located at both ends of the side panel 223 and can be made of aluminum to enhance structural strength, enabling stable assembly and smooth rotation of the CPV module unit 2 and the component frame 1. The mounting protrusions 224 have a cylindrical structure, with their axis coinciding with the axis of extension of the CPV module unit 2. The diameter can be designed according to the size of the CPV module unit 2, and the length is sufficient to insert into the mounting holes 11 of the component frame 1 with a suitable clearance. Mounting holes 11 are provided on the component frame 1 in areas corresponding to the assembly positions of each CPV module unit 2. The number of mounting holes 11 is the same as the number of mounting protrusions 224 for each CPV module unit 2, and the spacing is adapted to the arrangement spacing of adjacent CPV module units 2.

[0051] In some specific embodiments, reference is made to Figure 5 The component frame 1 has at least one side along the y-axis with a mounting groove 12 extending along the x-axis. One end of the mounting protrusion 224 of each CPV module unit 2 extends into the mounting groove 12. The rotating mechanism 3 is a chain gear, which is fixedly mounted on the protruding end of the mounting protrusion 224. The chain gears corresponding to each CPV module unit 2 are meshed and connected by a chain 5. The driving mechanism 4 is located outside the mounting groove 12 and is connected to at least one of the chain gears.

[0052] In this embodiment, the mounting groove 12 adopts a U-shaped groove structure to accommodate the chain gears and chain 5, etc. The length of the mounting groove 12 is consistent with the x-axis dimension of the component frame 1. The rotating mechanism 3 uses chain gears made of high-strength alloy material. The chain gears corresponding to each CPV module unit 2 are arranged sequentially along the x-axis of the mounting groove 12, and all chain gears are meshed and connected by a chain 5 to form a synchronous transmission mechanism. The drive mechanism 4 uses a motor. The output shaft of the motor is connected to the end of one of the chain gears through a coupling. Preferably, the chain gear connected to one end of the mounting groove 12 is convenient for wiring and maintenance.

[0053] During operation, the drive mechanism 4 receives commands from the controller and drives the connected chain gears to rotate via the coupling. Then, through the meshing transmission of the chain 5, it drives all the chain gears to rotate synchronously, thereby driving each CPV module unit 2 to rotate synchronously around its own axis. The mounting groove 12 forms a closed protection for the chain gears and chain 5, extending the service life of the transmission mechanism.

[0054] In some specific embodiments, reference is made to Figure 2 and Figure 4Both ends of the CPV module unit 2 are provided with sealed bearings 6. The sealed bearings 6 are mounted on the mounting protrusions 224 at the corresponding ends, and the outer ring of the sealed bearing 6 is fixed to the inner wall of the mounting hole 11 of the component frame 1. The sealed bearings 6 are deep groove ball sealed bearings, which can improve the rotational smoothness of the CPV module unit 2 and enhance the sealing and protection performance.

[0055] In some specific embodiments, reference is made to Figure 2 and Figure 4 Within one of the CPV module units 2, each of the chip batteries 24 is electrically connected via a cable 25 laid on the bottom panel 222. The cable 25 is led out from the CPV module unit 2 through a wiring port opened in the side panel 223 of the CPV module unit 2.

[0056] In this embodiment, within a CPV module unit 2, each chip battery 24 is connected in series or parallel via cables 25 laid on the bottom panel 222 to achieve power collection among the chip batteries 24 within the same CPV module unit 2. The specific connection method can be flexibly designed according to the voltage and current requirements of the components. In some embodiments, the cables 25 can be pre-embedded in the bottom panel 222, and the chip batteries 24 are glued or soldered to the corresponding wiring contacts on the cables 25 using conductive adhesive. The cables 25 are led out through wiring ports, and sealing rings can be installed inside the wiring ports to achieve sealing protection.

[0057] In some specific embodiments, adjacent CPV module units 2 are electrically connected via cables 25. The connection method can be selected as series or parallel depending on the output voltage and current requirements of the module, to achieve power collection and output of the entire concentrated photovoltaic module, and to connect to an external controller for solar position tracking and feedback.

[0058] In some specific embodiments, a preset gap is provided between the bottom panel 222 of the unit frame of each CPV module unit 2 and the component frame 1. The size of the preset gap is adapted to the maximum swing amount during the rotation of the CPV module unit, thereby avoiding contact interference between the bottom panel 222 of the unit frame 22 and the component frame 1 during the rotation of the CPV module unit 2. The specific value of the preset gap is determined comprehensively based on actual product parameters such as the cross-sectional dimensions of the CPV module unit 2 and the structural dimensions of the component frame 1.

[0059] In a specific example, the outer contour of the component frame 1 is 85cm × 85cm × 15cm. The component frame 1 contains 16 CPV module units 2, and each CPV module unit 2 has 16 CPV sub-modules 21, that is, a total of 256 CPV sub-modules 21 arranged in an array of 16 rows and 16 columns. The 16 CPV sub-modules 21 in each CPV module unit 2 are connected in series, and the 16 CPV module units 2 are connected in parallel. The total lead after coupling is connected to an external controller to realize solar position tracking. The spacing between adjacent CPV module units 2 is 5.2cm. Each CPV module unit 2 is 83.2cm long and 5cm wide. Each Fresnel lens 23 is a 5cm×5cm square structure with a focal length of 3.5-4cm, a transmittance of ≥92%, and a working wavelength range of 300-1100nm. The chip battery 24 uses a 2.5mm×2.5mm triple-junction germanium-based gallium arsenide (GaAs / Ge) solar cell chip with an open-circuit voltage of ≥2.5V, a short-circuit current density of ≥14mA / cm², and a photoelectric conversion efficiency of ≥38% under 500x concentration conditions. The two ends of the CPV module unit 2 are connected to the component frame 1 through deep groove ball bearings. The outer ring of the bearing integrates a chain gear to achieve 360° rotation. The two ends of 16 CPV module units 2 are connected by chains, and the rotation angle of 16 CPV module units 2 can be controlled simultaneously by a single motor.

[0060] Reference Figures 7-9 The embodiments of this application also provide a rooftop concentrating photovoltaic device, including a base 200, a horizontal angle adjustment device 300 and the aforementioned concentrating photovoltaic module 100. The concentrating photovoltaic module 100 is mounted on the base 200 via the horizontal angle adjustment device 300, and the horizontal angle adjustment device 300 drives the concentrating photovoltaic module 100 to rotate in the horizontal direction.

[0061] The rooftop concentrated photovoltaic (PV) device provided in this application embodiment has a base 200 for supporting the PV module 100. The base 200 has mounting holes at its bottom and is fixedly installed on the roof structure using expansion bolts or similar means. A horizontal angle adjustment device 300 is used to adjust the horizontal angle of the PV module 100. The horizontal angle adjustment device 300 includes a horizontal rotation drive motor 301, a rotation transmission mechanism 302, and an angle sensor (not shown in the figure). The horizontal rotation drive motor 301 drives the rotation transmission mechanism 302 to rotate horizontally, thereby synchronously adjusting the horizontal angle of the PV module 100 connected to it.

[0062] During operation, the external controller synchronously sends control commands to the drive mechanism 4 of the concentrating photovoltaic module 100 and the horizontal rotation drive motor 301 of the horizontal angle adjustment device 300 according to the real-time changes in the solar azimuth angle. Each CPV module unit 2 inside the concentrating photovoltaic module 100 rotates around its own axis to adapt to the changes in the solar altitude angle. The horizontal rotation drive motor 301 of the horizontal angle adjustment device 300 drives the rotation transmission mechanism 302 to operate, driving the concentrating photovoltaic module 100 to rotate 360° in the horizontal direction to adapt to the changes in the solar azimuth angle. The two work together to achieve all-round light tracking, ensuring that the Fresnel lens 23 of each CPV sub-module 21 is always facing the sunlight, and the chip battery 24 continuously receives the focused strong light, maximizing the photoelectric conversion efficiency.

[0063] The rooftop concentrating photovoltaic device of this application solves the problems of traditional crystalline silicon modules being unable to track light and having low power generation efficiency when installed flat. It also overcomes the shortcomings of traditional CPV tracking devices, such as high height and poor roof adaptability. It can achieve high-efficiency power generation in a small roof space and is suitable for application scenarios on the roofs of civil buildings.

[0064] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A concentrated photovoltaic module, characterized in that, It includes component frames, several CPV module units, several rotation mechanisms, and drive mechanisms; The CPV module unit is strip-shaped, and several CPV module units are arranged in parallel at intervals along the x-axis and installed in the area enclosed by the component frame; one end of each CPV module unit is connected to a corresponding rotating mechanism, and the driving mechanism is connected to each rotating mechanism to drive each rotating mechanism to rotate, and each rotating mechanism drives the corresponding connected CPV module unit to rotate around the axis of the corresponding CPV module unit itself.

2. The concentrated photovoltaic module as described in claim 1, characterized in that, Each of the CPV module units includes several CPV sub-modules; within one of the CPV module units, several of the CPV sub-modules are arranged along the y-axis direction perpendicular to the x-axis.

3. The concentrating photovoltaic module as described in claim 2, characterized in that, Each CPV module unit includes a unit frame, several Fresnel lenses, and several chip batteries. The unit frame includes a top cover, a bottom panel, two side panels, and two sealing panels. The top cover has several mounting positions along the y-axis, and the Fresnel lenses are correspondingly mounted in each of the mounting positions. The chip batteries are disposed at positions on the bottom panel that correspond one-to-one with the mounting positions. The two side panels are respectively disposed on both sides of the unit frame along the y-axis, and the two sealing panels are respectively disposed on both sides of the unit frame along the x-axis. The Fresnel lenses and the corresponding chip batteries form a CPV sub-module.

4. The concentrating photovoltaic module as described in claim 3, characterized in that, The side panel of the unit frame is provided with a mounting protrusion on the outer wall. The component frame is provided with mounting holes corresponding to the positions of each CPV module unit. The mounting protrusion and the corresponding mounting hole are fitted together to assemble the CPV module unit in the area enclosed by the component frame.

5. The concentrated photovoltaic module as described in claim 4, characterized in that, The component frame has at least one side along the y-axis with a mounting groove extending along the x-axis. One end of the mounting protrusion of each CPV module unit extends into the mounting groove. The rotating mechanism is a chain gear, which is fixedly mounted on the protruding end of the mounting protrusion. The chain gears corresponding to each CPV module unit are connected by chain meshing. The driving mechanism is located outside the mounting groove and is connected to at least one of the chain gears.

6. The concentrated photovoltaic module as described in claim 4, characterized in that, Both ends of the CPV module unit are provided with sealed bearings. The sealed bearings are installed on the mounting protrusions at the corresponding ends, and the outer ring of the sealed bearings is fixed to the inner wall of the mounting hole of the component frame.

7. The concentrating photovoltaic module as described in claim 3, characterized in that, Within one of the CPV module units, each of the chip batteries is electrically connected via cables laid on the bottom panel, and the cables are led out from the CPV module unit through wiring ports opened on the side panel of the CPV module unit.

8. The concentrated photovoltaic module as described in claim 7, characterized in that, Adjacent CPV module units are electrically connected via cables.

9. The concentrating photovoltaic module as described in claim 3, characterized in that, A preset gap is left between the bottom panel of the unit frame of each CPV module unit and the component frame, and the size of the preset gap is adapted to the maximum swing amount during the rotation of the CPV module unit.

10. A rooftop concentrating photovoltaic device, characterized in that, The device includes a base, a horizontal angle adjustment device, and a concentrating photovoltaic module as described in any one of claims 1-9, wherein the concentrating photovoltaic module is mounted on the base via the horizontal angle adjustment device, and the horizontal angle adjustment device drives the concentrating photovoltaic module to rotate in the horizontal direction.

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