Portable mobile photovoltaic power generation system based on photovoltaic module

Abstract

The invention relates to the technical field of photovoltaic power generation, and discloses a photovoltaic module-based portable and mobile photovoltaic power generation system, which comprises a lower box body and a sealing cover, the sealing cover and the lower box body are matched for use, a reflective tray is of a disc-shaped structure, and bulges distributed at equal intervals are arranged on the outer edge of the reflective tray; the telescopic cylinder unit comprises supporting frames, the inner diameters of the supporting frames are sequentially reduced, and when the telescopic cylinder unit is stretched, the multiple supporting frames are sequentially connected to form a tower structure; each flexible photovoltaic unit comprises flexible photovoltaic panels, the flexible photovoltaic panels are arranged on the outer wall of the cylindrical supporting frame, the flexible photovoltaic panels are connected through elastic cloth, and the flexible photovoltaic panels are connected end to end through the elastic cloth to form a cylindrical structure. According to the invention, through the operation closed loop of rapid deployment and safe storage, the dielectric property under low angle and scattered light is improved, the wind resistance and vibration resistance of the structure are enhanced, the thermal management efficiency is improved, the reliability of top surface protection compatible with light transmission is improved, and the protection and operation friendliness of an electrical system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic power generation, more particularly, it relates to a portable mobile photovoltaic power generation system based on photovoltaic modules. BACKGROUND

[0002] With the popularity of outdoor power supply, emergency protection and distributed scenarios, portable photovoltaic power generation systems widely adopt folding photovoltaic panels combined with simple supports or "power box-panel" split structures. The panels generally receive light in a single plane, and the inclination and orientation are adjusted manually to obtain a better incident angle. In low solar elevation angle, strong scattering or cloudy environment, the light receiving efficiency is significantly reduced.

[0003] The existing portable photovoltaic power generation mostly adopts rigid component solutions of folding panels or simple supports, which are limited by the layout angle and light receiving surface shape. In outdoor environments with low solar elevation angle and high scattering light proportion, the effective light receiving area is insufficient, and the power generation efficiency is significantly reduced. At the same time, heat dissipation relies on natural convection, and the high temperature rise of the component leads to further efficiency decline.

[0004] In portable scenarios, the deployment and storage process is often complicated, the wind resistance stability and locking reliability of the structure are insufficient, the outdoor protection and electrical interface waterproofness are not good, and the energy management is imperfect (such as no MPPT, poor DC / AC output adaptability), etc. It is difficult to balance lightweight, rapid deployment and high efficiency. SUMMARY

[0005] The present application provides a portable mobile photovoltaic power generation system based on photovoltaic modules, which solves the technical problems in the related art that it cannot be quickly deployed in portable outdoor scenarios, the light receiving efficiency is improved under low angle and scattering light conditions, the component working temperature is reduced and the structure wind resistance stability is maintained, and perfect energy management and protection are realized.

[0006] The present application provides a portable mobile photovoltaic power generation system based on photovoltaic modules, which solves the technical problems in the related art that it cannot be quickly deployed in portable outdoor scenarios, the light receiving efficiency is improved under low angle and scattering light conditions, the component working temperature is reduced and the structure wind resistance stability is maintained, and perfect energy management and protection are realized. The portable box body includes a lower box body and a sealing cover, an L-shaped sliding groove is opened on the side wall of the lower box body, a support spring is arranged at the groove bottom of the L-shaped sliding groove, and the sealing cover is used in cooperation with the lower box body; The light-reflecting tray is a disc-shaped structure, and a plurality of protrusions are arranged at equal intervals on the outer edge and are slidably connected in the L-shaped sliding groove. The upper surface of the light-reflecting tray is provided with a circular ring-shaped reflector; The telescopic cylinder unit includes a plurality of cylindrical support frames, the inner diameters of the plurality of cylindrical support frames are gradually reduced, the plurality of cylindrical support frames are concentrically sleeved, and a ventilation ring is arranged on the top end and the bottom end of the support frame; when the telescopic cylinder unit is stretched, the plurality of cylindrical support frames are connected in sequence, and the plurality of cylindrical support frames are pulled up to form a tower structure; The flexible photovoltaic unit comprises a plurality of flexible photovoltaic panels, the flexible photovoltaic panels are arranged on the outer wall of a cylindrical support frame, the flexible photovoltaic panels are connected by elastic cloth, and the flexible photovoltaic panels are connected in a cylindrical structure by the elastic cloth. The power generation auxiliary unit is arranged on the inner wall of the bottom end of the lower box body and comprises a storage battery pack, a power generation controller and an inverter device, which are connected by a waterproof quick connector.

[0007] Further, the L-shaped sliding groove comprises a vertical channel and a horizontal channel, and the vertical channel and the horizontal channel are connected in series in an L shape.

[0008] Further, a retractable baffle is arranged at the bottom end of the protrusion, the baffle abuts against the protrusion when the protrusion slides in the vertical channel of the L-shaped sliding groove, and the end of the baffle is provided with a reset spring, the baffle is lifted out when the protrusion slides in the horizontal channel of the L-shaped sliding groove, and the baffle blocks the springing of the supporting spring.

[0009] Further, the top of the sealing cover is provided with a high-strength transparent ring, and a magnetic sealing gasket is arranged on the outer side wall of the high-strength transparent ring.

[0010] Further, the sealing cover is arranged above the uppermost support frame, and the sealing cover is used for protecting the flexible photovoltaic unit on the support frame from being vertically upward.

[0011] Further, the inner side wall of the ventilation ring is provided with a magnetic ring, and when the support frame is pulled up, the adjacent support frames form a tower structure through the magnetic rings.

[0012] Further, the magnetic sealing gasket comprises a flexible base body, the flexible base body is embedded with a neodymium-iron-boron magnet to form a continuous magnetic ring, and a velvet pad is arranged on the inner side wall of the flexible base body.

[0013] Further, the flexible photovoltaic panel is packaged by a flexible back plate and a thin layer of EVA, and the single piece of the flexible photovoltaic panel is arc-shaped and adheres to the outer wall of the support frame.

[0014] Further, the flexible photovoltaic unit is fixed by magic tape, the wires of the flexible photovoltaic unit are vertically arranged along the support frame, and a wire slot and a wire pressing part are arranged at the ventilation ring.

[0015] The beneficial effects of the present application are as follows: The present application is a portable mobile photovoltaic power generation system based on photovoltaic modules, which is characterized in that: the photovoltaic module is combined with a flexible cylindrical light-receiving surface to significantly improve the incidence and utilization of low-angle and scattered light; a telescopic cylinder support frame and a magnetic ring are combined to form a stable tower structure; a two-section mechanical lock is used to enhance the overall wind resistance and operation safety, and a transparent magnetic sealing cover at the top end provides vertical protection without blocking light; a ventilation ring is provided to form a "chimney effect" to enhance heat dissipation, reduce component temperature, and optimize power generation efficiency and MPPT tracking. In summary, the system improves the dielectric performance under low-angle and scattered light, enhances the wind resistance and vibration resistance of the structure, improves the heat management efficiency, improves the reliability of the top surface protection and light transmission, and improves the protection and operation friendliness of the electrical system through the rapid deployment and safe storage of the operation closed loop. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of a portable mobile photovoltaic power generation system based on photovoltaic modules according to the present application; Figure 2 is an assembly structure schematic diagram of Figure 1 according to the present application; Figure 3 is an expanded schematic diagram of Figure 1 according to the present application; Figure 4 is a front view of Figure 3 according to the present application; Figure 5 is an A-A cross-sectional structure schematic diagram of Figure 4 according to the present application.

[0017] In the figure: 100, portable box; 110, lower box body; 120, sealing cover; 121, high-strength transparent ring; 122, magnetic sealing gasket; 200, telescopic cylinder unit; 300, flexible photovoltaic unit; 400, L-shaped sliding groove; 500, light-reflecting tray; 510, reflector; 520, protrusion; 530, baffle; 540, support spring; 600, power generation auxiliary unit. DETAILED DESCRIPTION

[0018] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed without departing from the scope of the present specification. Various processes or components can be omitted, substituted, or added according to various examples. In addition, features described with respect to some examples can be combined in other examples.

[0019] As Figures 1-5As shown, a portable photovoltaic power generation system based on photovoltaic modules includes a portable box 100, a reflective tray 500, an extension cylinder unit 200, a flexible photovoltaic unit 300, and a power generation auxiliary unit 600. The portable box 100 is a cylindrical structure, including a lower box body 110 and a sealing cover 120. An L-shaped sliding groove 400 is formed on the side wall of the lower box body 110. The inner edge of the top end of the lower box body 110 is chamfered. The outer edge of the bottom end of the sealing cover 120 is also chamfered. A magnetic sealing gasket 122 is arranged on the chamfered structure of the sealing cover 120 and the lower box body 110. A spring hole is formed in the groove bottom of the L-shaped sliding groove 400. A supporting spring 540 is arranged in the spring hole. The reflective tray 500 is a disc-shaped structure. Equidistant protrusions 520 are arranged on the outer edge of the reflective tray 500. The protrusions 520 are slidingly connected in the L-shaped sliding groove 400. A circular ring-shaped reflector 510 is arranged on the upper surface of the reflective tray 500. A retractable baffle 530 is arranged at the bottom end of the protrusion 520. When the protrusion 520 slides in the vertical channel of the L-shaped sliding groove 400, the baffle 530 abuts against the protrusion 520. The end of the baffle 530 is provided with a reset spring. When the protrusion 520 slides in the horizontal channel of the L-shaped sliding groove 400, the baffle 530 rises and blocks the ejection of the supporting spring 540. The extension cylinder unit 200 includes a plurality of cylindrical support frames. The inner diameters of the plurality of cylindrical support frames decrease in turn. The plurality of cylindrical support frames are concentrically arranged. A ventilation ring is arranged on the top end and the bottom end of each support frame. A magnetic ring is arranged on the inner side wall of the ventilation ring. When the extension cylinder unit 200 is stretched, the plurality of cylindrical support frames are connected in turn. The plurality of cylindrical support frames are pulled up to form a tower structure. The magnetic ring stabilizes the tower structure. A flexible photovoltaic unit 300 is arranged on the outer wall of each cylindrical support frame. The flexible photovoltaic unit 300 includes a plurality of small pieces of flexible photovoltaic panels. The flexible photovoltaic panels are connected by elastic cloth. The flexible photovoltaic panels have an arc-shaped structure. The plurality of small pieces of flexible photovoltaic panels are connected in a tube-shaped structure by the elastic cloth. The power generation auxiliary unit 600 includes, but is not limited to, a battery pack, a power generation controller, and an inverter device. The power generation auxiliary unit 600 can be arranged on the inner wall of the bottom end of the lower box body 110. It should be noted that a high-strength transparent ring 121 is arranged on the top of the sealing cover 120. The high-strength transparent ring 121 allows light to pass through the sealing cover 120 and hit the surface of the flexible photovoltaic unit 300. The sealing cover 120 is arranged above the uppermost support frame. The sealing cover 120 is used for protecting the flexible photovoltaic unit 300 on the support frame from being vertically upward. It should be noted that a brake universal wheel is arranged at the bottom end of the lower box body 110. To ensure the stability and high efficiency of the system in different environments, the structure and electrical cooperation are further refined as follows: The lower box body 110 of the portable box body 100 is preferably made of aluminum alloy deep drawing and anodized to improve corrosion resistance and surface hardness. The sealing cover 120 and the lower box body 110 are connected by a circumferential magnetic sealing pad 122 to achieve quick opening and reliable sealing. The magnetic sealing pad 122 is composed of NBR or silicone base embedded with N35 to N52 neodymium iron boron magnets to form a continuous magnetic ring. The inner side wall of the NBR or silicone base is provided with a velvet pad. The chamfer is used to guide the sealing pad to fit and avoid shear damage.

[0020] The L-shaped chute 400 is evenly arranged in three to four rows along the circumference to balance the positioning accuracy and operation convenience. The support spring 540 at the bottom of the chute is made of stainless steel material. The elastic coefficient is selected to make the reflective tray 500 smoothly lift in the vertical groove and form mechanical self-locking with the baffle 530 in the horizontal groove. The gap between the protrusion 520 and the chute is controlled within 0.1 to 0.3 mm to obtain smooth sliding while suppressing shaking; The main body of the reflective tray 500 can be made of aluminum honeycomb sandwich or magnesium-aluminum alloy pressing structure to balance light weight and rigidity. The upper surface is attached with a high reflectivity silver mirror film or an aluminumized reflective film with a reflectivity of not less than 85%. The equidistant protrusions 520 at the outer edge of the tray are coated with a wear-resistant coating to reduce long-term sliding wear. The retractable baffle 530 at the bottom of the protrusion 520 is driven by an elastic member or a micro slide rail. It is lifted to resist the ejection of the support spring 540 in the horizontal groove position, and it is retracted to avoid interference in the vertical groove position, thereby forming a safe two-section positioning and locking; Each level of the cylindrical support frame of the telescopic cylinder unit 200 adopts a telescope type structure with concentric sleeves. The top and bottom ends of the support frame are connected to the outer circle of the ventilation ring and are provided with a magnetic ring on the inner side. The magnetic ring is composed of segmented magnets and soft magnetic back plates to generate a circumferential adsorption force to stabilize the tower structure after stretching into place. The ventilation ring forms a vertical air duct when the tower is unfolded, which enhances the convection heat dissipation in the cylinder by the chimney effect, and reduces the working temperature of the flexible photovoltaic unit 300. The flexible photovoltaic unit 300 is composed of several small pieces of flexible photovoltaic panels connected by elastic cloth to form a nearly cylindrical light receiving surface. Each small piece can be packaged with a flexible back plate and a thin layer of EVA to improve the bending resistance. The single piece is arc-shaped to fit the outer wall of the support frame. The elastic cloth between the pieces is made of weather-resistant fabric and can be provided with a limiting belt in the longitudinal direction to limit excessive stretching. The flexible photovoltaic unit 300 is fixed with the support frame by magic tape for maintenance and replacement. The wires are vertically wired along the support frame and provided with a wire slot and a wire pressing part at the ventilation ring to prevent swinging and wear; The power generation auxiliary unit 600 contains a power generation controller with maximum power point tracking function in specific implementation to adapt to different light conditions, the input voltage range is preferably 12 to 48V to be compatible with flexible photovoltaic panels in different series and parallel configurations, overcharge and overdischarge protection and temperature protection are provided between the controller and the battery pack, the battery pack can use lithium iron phosphate battery to improve the cycle life, the capacity can be selected in the range of 500 to 2000W according to the scene, the system is provided with a direct current output port for directly supplying power to a direct current load and a portable inverter device for providing standard alternating current output such as 220V, 50Hz, the inverter device has overload and short circuit protection and can work with the controller, all electrical units are connected through waterproof quick connectors, the key connections reach IP54 to IP65 protection level, the cables are fixed in the box by tape and buckle and a maintenance space is reserved, an emergency power-off button is provided outside the box to quickly cut off the load in abnormal conditions; Based on the above photovoltaic power generation system, the complete work flow is described as follows: In the transportation and deployment stage, the operator pushes the portable box 100 to the predetermined position through the universal wheel with brake, releases the brake, adjusts the box posture to make the indicated orientation line point to the local north-south reference, and selects the appropriate position according to the solar elevation angle, opens the sealing cover 120 and checks the integrity of the flexible photovoltaic unit 300 and the wire connection, then holds the outer edge of the reflector tray 500 with both hands to make the protrusion 520 slowly ascend along the vertical slot of the L-shaped sliding groove 400, the supporting spring 540 provides bottom support and avoids instantaneous impact, after the reflector tray 500 reaches the predetermined height, the protrusion 520 is turned into the horizontal slot to make the baffle 530 automatically rise to form a horizontal locking, at this time the reflector 510 is located below or circumferentially of the flexible photovoltaic unit 300 for secondary reflection of incident light to enhance light reception; Then pull up the telescopic cylinder unit 200 to gradually unfold each cylindrical support frame from bottom to top, the magnetic attraction ring at the top and bottom generates an attractive force to fix the adjacent support frame when each level is in place, so that the whole machine forms a stable tower structure, the flexible photovoltaic unit 300 is uniformly stretched on the outer wall of the support frame to form a regular cylindrical light receiving surface, the ventilation ring forms a vertical air duct to improve the heat dissipation and cooling efficiency, the operator repositions the sealing cover 120 above the uppermost support frame and completes the sealing by the magnetic sealing gasket 122 to form the top protection; In the electrical access stage, the operator connects the output lead of the flexible photovoltaic unit 300 to the input terminal of the power generation controller, confirms the polarity and waterproof plug in place, connects the battery pack, and presses the controller start button. The controller enters the initialization and starts the maximum power point tracking. After the light is stable, the DC load is connected to the DC output terminal or the AC power supply is obtained by connecting the inverter device. The system starts charging and power supply and monitors the voltage, current and battery remaining capacity through the controller display screen or mobile terminal. In cloudy or windy environment, the reflective tray 500 cooperates with the flexible cylindrical light receiving surface and the ventilation ring to maintain light receiving and temperature control. The magnetic ring maintains the stability of the structure to resist gusts and vibrations. In the deactivation and storage stage, the operator first closes the AC inverter and DC load in sequence and makes the controller enter standby. Disconnect the photovoltaic input and battery connection. Remove the sealing cover 120 and temporarily place it in a safe position. In the order from top to bottom, release the magnetic attraction at each level and slowly retract the telescopic cylinder unit 200 to make the support frame concentric. The flexible photovoltaic unit 300 is then naturally recovered and attached to the outer wall of the support frame. The convex 520 of the reflective tray 500 is turned from the horizontal slot to the vertical slot, and the baffle 530 is retracted and slowly lowered to the top of the lower box body 110 under the action of the support spring 540. Finally, reset the sealing cover 120 and form a seal through the magnetic sealing gasket 122. After closing the brake, move the box body back to the storage location through the brake universal wheel to complete the storage. In the daily maintenance process, the surface of the flexible photovoltaic unit 300 is cleaned by stretching the telescopic cylinder unit 200 and using the internal velvet pad. The surface of the sealing cover 120 and the reflector 510 is cleaned regularly to reduce dust obstruction and check the wear of the elastic cloth and wiring. If the surface coating of the flexible photovoltaic chip is found to be aged or cracked, it can be replaced and repaired in a detachable and fixed manner. The heat dissipation channel of the controller and inverter device needs to be kept unobstructed. In case of strong wind or heavy rain, the system should be stored in time and the key electrical nodes should be protected from erosion through the protection level. The system forms two-stage positioning and mechanical self-locking through the L-shaped sliding groove 400, support spring 540 and telescopic baffle 530 of the cylindrical portable box body 100, and the equidistant convex 520 of the reflective tray 500 slides with the circular reflector 510. After unfolding, it reflects the incident light twice to compensate for the low angle and scattered light conditions. The telescopic cylinder unit 200 adopts a concentric telescopic support frame. The top and bottom ventilation rings are connected and set with a magnetic ring. After unfolding, the circumferential magnetic force stabilizes the tower-shaped structure, forming a vertical convection channel, using the "chimney effect" to enhance heat dissipation, reduce component temperature rise, and improve power generation efficiency and output stability. The flexible photovoltaic unit 300 is composed of arc-shaped chips and elastic cloth connected end to end in a cylindrical light receiving surface, receiving incident and reflected light in multiple directions, expanding the effective light receiving area, and considering lightness and maintainability. The sealing cover 120 is made of high-strength transparent material and cooperates with the chamfer of the lower box body 110 and the magnetic sealing gasket 122 to provide vertical protection and reduce the adverse effects of rain and dust and impact on the components. The universal wheel with brake improves the convenience and safety of lifting, moving and positioning. The power generation auxiliary unit 600 introduces a controller with maximum power point tracking, a protected battery pack and an inverter device to improve the protection level and reliability of electrical connection through a waterproof quick connector. Through the cooperation of the above structure and workflow, the system can realize rapid deployment, stable light receiving and efficient energy management in outdoor scenes, and balance portability and reliability. The combination of the reflective tray 500 and the flexible cylindrical photovoltaic improves the effective light receiving area under low angle and scattered light conditions. The vertical convection formed by the ventilation ring reduces the temperature of the components to improve the power generation efficiency. The magnetic sealing and two-stage sliding groove locking improve the operation safety and wind resistance stability. The overall scheme is suitable for various scenes such as emergency power supply, field work and home backup. The embodiments of the present application have been described above, but the present application is not limited to the specific embodiments described above. The specific embodiments described above are only illustrative and not limiting. Those skilled in the art can make many forms under the inspiration of the present application, which are all within the protection scope of the present application.

Claims

1. A portable, mobile photovoltaic power generation system based on photovoltaic modules, characterized in that, include: The portable case includes a lower box and a sealing cover. An L-shaped groove is opened on the side wall of the lower box, and a support spring is provided at the bottom of the L-shaped groove. The sealing cover is used in conjunction with the lower box. The reflective tray has a disc-shaped structure with equidistant protrusions on its outer edge. The protrusions are slidably connected in an L-shaped groove. The upper surface of the reflective tray is equipped with a ring-shaped reflector. The telescopic cylinder unit includes several cylindrical support frames, the inner diameter of which decreases sequentially, and the cylindrical support frames are concentrically nested. Each support frame has a ventilation ring at its top and bottom. When the telescopic cylinder unit is stretched, the cylindrical support frames are connected in sequence and pulled up into a tower structure. A flexible photovoltaic unit includes several small flexible photovoltaic panels. The flexible photovoltaic panels are mounted on the outer wall of a cylindrical support frame. The flexible photovoltaic panels are connected to each other by elastic fabric, and the flexible photovoltaic panels are joined end to end by elastic fabric to form a cylindrical structure. The auxiliary power generation unit, located on the inner wall of the bottom of the lower housing, includes a battery pack, a power generation controller, and an inverter, which are connected by a waterproof quick-connect connector.

2. The portable photovoltaic power generation system based on photovoltaic modules according to claim 1, characterized in that, The L-shaped chute includes a vertical channel and a horizontal channel, which are connected end to end to form an L-shape.

3. A portable photovoltaic power generation system based on photovoltaic modules according to claim 2, characterized in that, A retractable baffle is provided at the bottom of the protrusion. When the protrusion slides in the vertical channel of the L-shaped slide groove, the baffle abuts against the inside of the protrusion. A return spring is provided at the end of the baffle. When the protrusion slides in the horizontal channel of the L-shaped slide groove, the baffle rises out and blocks the pop-out of the support spring.

4. A portable photovoltaic power generation system based on photovoltaic modules according to claim 3, characterized in that, The top of the sealing cap is equipped with a high-strength transparent ring, and a magnetic sealing gasket is provided on the outer wall of the high-strength transparent ring.

5. A portable photovoltaic power generation system based on photovoltaic modules according to claim 4, characterized in that, The sealing cap is installed above the topmost support frame and is used to protect the flexible photovoltaic units on the support frame from vertical upward movement.

6. A portable photovoltaic power generation system based on photovoltaic modules according to claim 5, characterized in that, Magnetic rings are provided on the inner wall of the ventilation ring. When the support frame is pulled up, the adjacent support frames form a tower-like structure through the magnetic rings.

7. A portable photovoltaic power generation system based on photovoltaic modules according to claim 1, characterized in that, The magnetic sealing gasket includes a flexible substrate, in which neodymium iron boron magnets are embedded to form a continuous magnetic ring, and a velvet pad is provided on the inner side wall of the flexible substrate.

8. A portable photovoltaic power generation system based on photovoltaic modules according to claim 1, characterized in that, The reflector uses a high-reflectivity silver mirror film or an aluminized reflective film.

9. A portable photovoltaic power generation system based on photovoltaic modules according to claim 1, characterized in that, Flexible photovoltaic panels use a flexible backsheet and thin-layer EVA encapsulation. Each flexible photovoltaic panel is arc-shaped and fits the outer wall of the support frame.

10. A portable photovoltaic power generation system based on photovoltaic modules according to claim 9, characterized in that, The flexible photovoltaic unit is fixed to the support frame with Velcro. The wires of the flexible photovoltaic unit are laid vertically along the support frame, and a wiring trough and wire clamping device are provided at the ventilation ring.

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