Portable power supply device based on solar charger

Abstract

The invention provides a portable power supply device based on a solar charger. The power supply device comprises a photovoltaic assembly, an energy storage assembly and a moving assembly. The photovoltaic module is composed of a plurality of photovoltaic panels, a frame, a linear actuator and a pitch angle adjusting mechanism, and the frame is driven by the linear actuator to achieve expansion and contraction of the photovoltaic module. The pitch angle adjusting mechanism comprises a telescopic arm and is used for adjusting the receiving angle of the photovoltaic panel and improving the solar energy capturing efficiency. The energy storage assembly comprises a battery and an electric energy conversion circuit and is used for storing energy collected by the photovoltaic panel. The moving assembly is composed of a driving controller, a tracking controller and a moving chassis and is responsible for bearing and pushing the whole device to move or rotate. Through cooperative work of the sensor and the controller, the movable chassis can adjust power assisting output according to the ground gradient, the weight and the battery electric quantity, and the experience of a user when the power supply device is moved is optimized.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric devices, and in particular, relates to a portable electric power supply device based on a solar charger. Background Art

[0002] As the demand for portable power supply for mobile devices and outdoor activities increases, traditional power supply methods face many challenges, especially in remote areas or outdoor environments where it is difficult to obtain a stable grid power supply. Existing portable power devices usually rely on battery energy storage, which has limited endurance and cannot achieve long-term continuous power supply. To solve this problem, solar charging technology has gradually become an ideal solution, but existing solar portable devices often lack flexibility in deploying photovoltaic panels and tracking the angle of the sun, and cannot fully utilize solar energy resources. In addition, the existing mobile chassis design fails to effectively combine the user's push and pull actions and terrain conditions to optimize the power assist, resulting in inconvenient operation.

[0003] According to the relevant public technologies, the technical solution with publication number CN114683899A proposes a modular mobile energy storage and charging device with integrated photovoltaic storage and charging, which integrates the car with the photovoltaic power generation system and the energy storage system to achieve a highly mobile photovoltaic storage and charging solution; the technical solution with publication number KR101381592B1 proposes a mobile energy storage system integrated in a container, which realizes a large-capacity and highly mobile energy storage solution by arranging multiple battery modules in the container; the technical solution of US20140375272A1 proposes a mobile energy storage device, which can be adapted to electric vehicles and can be disassembled from the electric vehicles and used as a separate energy storage and power supply device.

[0004] The above technical solutions all propose several devices that can realize mobile energy storage and energy supply. However, more technical solutions are still needed to meet the needs of smaller and more flexible energy storage forms, as well as mobile devices that can be charged at any time.

[0005] The foregoing discussion of the background art is intended only to facilitate an understanding of the present invention. This discussion does not acknowledge or admit that any of the material referred to is part of the common general knowledge. Summary of the invention

[0006] The purpose of the present invention is to provide a portable power supply device based on a solar charger; the power supply device includes a photovoltaic component, an energy storage component and a mobile component; the photovoltaic component is composed of a plurality of photovoltaic panels, a frame, a linear actuator and a pitch angle adjustment mechanism, and the frame is driven by the linear actuator to realize the expansion and contraction of the photovoltaic component. The pitch angle adjustment mechanism includes a telescopic arm for adjusting the receiving angle of the photovoltaic panel to improve the efficiency of solar energy capture. The energy storage component includes a battery and an electric energy conversion circuit for storing energy collected by the photovoltaic panel. The mobile component is composed of a drive controller, a tracking controller, and a mobile chassis, which is responsible for carrying and driving the entire device to move or rotate. Through the coordinated work of sensors and controllers, the mobile chassis can adjust the auxiliary power output according to the ground slope, weight and battery power, thereby optimizing the user experience when using the mobile power supply device.

[0007] The present invention adopts the following technical solution: a portable power supply device based on a solar charger, the power supply device comprising: a photovoltaic component, an energy storage component and a mobile component; The photovoltaic assembly includes a plurality of photovoltaic panels, a plurality of frames, a plurality of linear actuators, a pitch angle adjustment mechanism, and related circuits for photovoltaic panel power transmission and for linear actuator power transmission; The energy storage component is installed inside the mobile component and includes an electric converter, a battery, and an input / output circuit; The mobile component includes a mobile chassis, a drive controller and a tracking controller; the mobile component is used to carry the photovoltaic component and the energy storage component, and provide power to drive the power supply device to move or rotate as a whole; Wherein, the plurality of support frames are used to frame and fix the corresponding photovoltaic panels; the support frames are driven by the plurality of linear actuators to implement transformation, so as to realize the overall expansion and contraction deformation of the photovoltaic assembly; the photovoltaic receiving surface is formed by the receiving surface of one or more photovoltaic panels exposed to the outside; The pitch angle adjustment mechanism includes a telescopic arm and a driving mechanism; the movable end of the telescopic arm is installed at the bottom of the photovoltaic module, and the fixed end of the telescopic arm is fixed to the mobile chassis, and the normal angle of the photovoltaic receiving surface is changed by changing the relative angle of the joint of the telescopic arm; and after the photovoltaic module shrinks and deforms, the photovoltaic module is lowered by the telescopic arm so that the photovoltaic module is covered on the surface of the mobile chassis as a whole; Preferably, the multiple frames in the photovoltaic assembly include a main frame, which is arranged in the center, and sub-frames are arranged above, below, on the left and on the right, respectively, and each of the sub-frames is connected to the main frame through a slide rail mechanism; the multiple photovoltaic panels are respectively mounted on the main frame and the four sub-frames; In addition, triangular frames are respectively arranged on the left and right sub-frames; each of the triangular frames is connected to the left and right sub-frames through a folding mechanism; each of the triangular frames is installed with a photovoltaic panel of a corresponding shape; Through the above arrangement, the sub-frames located above, below, left and right of the main frame slide and are stored inside the main frame through the slide rail mechanism, and completely cover the main frame in a stacked state; Preferably, the upper and lower edges of the main frame are provided with slide rails corresponding to the sub-frames on the left and right sides respectively; the left and right edges of the main frame are provided with slide rails corresponding to the sub-frames on the upper and lower ends respectively; Furthermore, each sub-frame is provided with at least one linear actuator to drive the sub-frame to slide along the slide rail provided thereon, so as to drive the sub-frame to expand and contract relative to the main frame; Preferably, the tracking controller includes a three-axis gyroscope sensor and a positioning sensor; the three-axis gyroscope sensor is arranged on the back of the main frame, and measures the pitch angle of the photovoltaic receiving surface with the pitch angle of the main frame; the positioning sensor is used to determine the global longitude and latitude of the power supply device; The tracking controller calculates the solar elevation angle and the solar azimuth angle according to the acquired pitch angle data of the photovoltaic receiving surface and the current global longitude and latitude data; and controls the telescopic arm to adjust the pitch angle of the photovoltaic receiving surface by an automatic program; Furthermore, the tracking controller is coupled to the driving controller circuit; the driving controller cooperates with the tracking controller to control the mobile chassis to rotate in an automatic program to change the horizontal orientation of the photovoltaic receiving surface; Preferably, the mobile chassis includes at least one driving motor and a power sensor; the driving motor outputs power to drive the mobile chassis to move and / or rotate; the power sensor detects the user's push and pull action on the power supply device, and the driving controller controls the output power of the driving motor according to the user's push and pull direction, so as to intervene and assist the user in pushing and pulling actions; Preferably, an indicator light is provided on the surface of the power supply device for indicating to the user to adjust the directionality of the power supply device.

[0008] The beneficial effects achieved by the present invention are: The power supply device of the technical solution combines multiple photovoltaic panels with an adjustable pitch angle adjustment mechanism. The photovoltaic panels can automatically adjust their angles according to the position of the sun, always maintaining the best incident angle, thereby improving the efficiency of capturing solar energy. The linear actuator drives the expansion and contraction of the photovoltaic components, so the device not only has flexible adaptability, but also reduces the occupied space when not in use. The mobile component of the power supply device of this technical solution integrates sensors, drive motors and auxiliary power control algorithms, and can intelligently adjust the auxiliary power output of the chassis according to factors such as ground slope, total weight of the equipment, and battery power. In this way, users no longer need to exert excessive force when pushing and pulling the equipment, and can easily move even on complex terrain, enhancing the portability and operating experience of the equipment; The energy storage component of the power supply device of this technical solution includes batteries, power converters and input / output circuits, and has effective power storage and management functions. Through the power management system, the energy storage component can monitor the battery power in real time and adjust the power output according to the remaining power; this not only extends the endurance of the device, but also ensures stable power supply for external devices to meet the needs of long-term outdoor use; The software and hardware parts of the power supply device of the present technical solution adopt a modular design. The various working modules and components of the hardware part of the system, as well as the instructions, parameters, and algorithms of the software part can be conveniently replaced and / or upgraded later, thereby reducing the construction cost and maintenance cost of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0010] Description of the accompanying drawings: 10-mobile chassis; 20-assembly; 22-main frame; 24a-upper sub-frame; 24b-lower sub-frame; 26a-left sub-frame; 26b-right sub-frame; 28a-left triangular frame; 28b-right triangular frame; 40-mobile chassis; 44-drive controller; 46-tracking controller; 500-computing architecture; 502-bus; 504-processor; 506-main memory; 508-read-only memory; 510-storage device; 512-display; 514-input device; 516-cursor control device; 518-network device; Figure 1 is a schematic diagram of a power supply device according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the expansion steps of the assembly described in the embodiment of the present invention; Figure 3 and Figure 4 is a schematic diagram of a solar model in an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the mobile chassis in the present invention; Figure 6 FIG. 1 is a schematic diagram of the architecture of a computer system used in an embodiment of the present invention. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with its 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. For those skilled in the art, after reviewing the following detailed description, other systems, methods and / or features of the present embodiment will become apparent. It is intended that all such additional systems, methods, features and advantages are included in this specification. Included within the scope of the present invention and protected by the appended claims. Additional features of the disclosed embodiments are described in the following detailed description, and these features will be apparent from the following detailed description.

[0012] The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right" and the like indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation. The invention is constructed and operated in a specific orientation, so the terms describing the positional relationship in the drawings are only used for exemplary description and cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0013] Embodiment 1: Exemplarily, a portable power supply device based on a solar charger is proposed, the power supply device comprising: a photovoltaic component, an energy storage component and a mobile component; The photovoltaic assembly includes a plurality of photovoltaic panels, a plurality of frames, a plurality of linear actuators, a pitch angle adjustment mechanism, and related circuits for photovoltaic panel power transmission and for linear actuator power transmission; The energy storage component is installed inside the mobile component and includes an electric converter, a battery, and an input / output circuit; The mobile component includes a mobile chassis, a drive controller and a tracking controller; the mobile component is used to carry the photovoltaic component and the energy storage component, and provide power to drive the power supply device to move or rotate as a whole; Wherein, the plurality of support frames are used to frame and fix the corresponding photovoltaic panels; the support frames are driven by the plurality of linear actuators to implement transformation, so as to realize the overall expansion and contraction deformation of the photovoltaic assembly; the photovoltaic receiving surface is formed by the receiving surface of one or more photovoltaic panels exposed to the outside; The pitch angle adjustment mechanism includes a telescopic arm and a driving mechanism; the movable end of the telescopic arm is installed at the bottom of the photovoltaic module, and the fixed end of the telescopic arm is fixed to the mobile chassis, and the normal angle of the photovoltaic receiving surface is changed by changing the relative angle of the joint of the telescopic arm; and after the photovoltaic module shrinks and deforms, the photovoltaic module is lowered by the telescopic arm so that the photovoltaic module is covered on the surface of the mobile chassis as a whole; Preferably, the multiple frames in the photovoltaic assembly include a main frame, which is arranged in the center, and sub-frames are arranged above, below, on the left and on the right, respectively, and each of the sub-frames is connected to the main frame through a slide rail mechanism; the multiple photovoltaic panels are respectively mounted on the main frame and the four sub-frames; In addition, triangular frames are respectively arranged on the left and right sub-frames; each of the triangular frames is connected to the left and right sub-frames through a folding mechanism; each of the triangular frames is installed with a photovoltaic panel of a corresponding shape; Through the above arrangement, the sub-frames located above, below, left and right of the main frame slide and are stored inside the main frame through the slide rail mechanism, and completely cover the main frame in a stacked state; Preferably, the upper and lower edges of the main frame are provided with slide rails corresponding to the sub-frames on the left and right sides respectively; the left and right edges of the main frame are provided with slide rails corresponding to the sub-frames on the upper and lower ends respectively; Furthermore, each sub-frame is provided with at least one linear actuator to drive the sub-frame to slide along the slide rail provided thereon, so as to drive the sub-frame to expand and contract relative to the main frame; Preferably, the tracking controller includes a three-axis gyroscope sensor and a positioning sensor; the three-axis gyroscope sensor is arranged on the back of the main frame, and measures the pitch angle of the photovoltaic receiving surface with the pitch angle of the main frame; the positioning sensor is used to determine the global longitude and latitude of the power supply device; The tracking controller calculates the solar elevation angle and the solar azimuth angle according to the acquired pitch angle data of the photovoltaic receiving surface and the current global longitude and latitude data; and controls the telescopic arm to adjust the pitch angle of the photovoltaic receiving surface by an automatic program; Furthermore, the tracking controller is coupled to the driving controller circuit; the driving controller cooperates with the tracking controller to control the mobile chassis to rotate in an automatic program to change the horizontal orientation of the photovoltaic receiving surface; Preferably, the mobile chassis includes at least one driving motor and a power sensor; the driving motor outputs power to drive the mobile chassis to move and / or rotate; the power sensor detects the user's push and pull action on the power supply device, and the driving controller controls the output power of the driving motor according to the user's push and pull direction, so as to intervene and assist the user in pushing and pulling actions; Preferably, an indicator light is provided on the surface of the power supply device to indicate to the user the operation of adjusting the directionality of the power supply device; As attached Figure 1 As shown, an embodiment of the power supply device is exemplarily shown; It shows a combination 20 formed by combining a plurality of photovoltaic panels through a frame and a mobile chassis 10; As attached Figure 1 As shown in the figure, the assembly 20 includes a main frame 22, an upper sub-frame 24a and a lower sub-frame 24b located above the main frame 22, and a left sub-frame 26a and a right sub-frame 26b located on the left and right sides of the main frame 22; and further, two left triangular frames 28a and two right triangular frames 28b are respectively arranged on the left sub-frame 26a and the right sub-frame 26b; Furthermore, each sub-frame is equipped with a linear actuator for driving and controlling its movement relative to the main frame; Figure 2 The figure shows the changes of the assembly 20 during the unfolding process; when the assembly 20 is in a contracted state, multiple linear actuators drive each sub-frame to unfold smoothly from the main frame along the slide rail; when the sub-frame is fully unfolded, a complete photovoltaic receiving surface is formed; wherein, the left sub-frame 26a and the right sub-frame 26b are respectively provided with triangular frames, and the triangular frames are connected to the left and right sub-frames through a folding mechanism; when unfolding, the triangular frames are also controlled by the linear actuator to unfold, thereby increasing the overall light receiving area of ​​the photovoltaic assembly; When the assembly 20 needs to be changed from the expanded state to the contracted state, the multiple linear actuators operate in reverse, and each sub-frame is driven by the linear actuator to contract along the slide rail toward the center of the main frame, and finally covers the main frame in a stacked manner; in the contracted state, the assembly body 20 can be kept compact and stored, reducing the overall occupied space, and can serve as the top covering structure of the mobile chassis 10 to protect the back of the assembly body 20 and multiple components inside the mobile chassis 10; Preferably, the plurality of linear actuators are provided with electrical energy required for operation by the energy storage assembly; In photovoltaic power generation systems, the incident angle of sunlight on photovoltaic panels is crucial, because the incident angle of the sun directly determines the amount of solar radiation received by the photovoltaic panel, thereby affecting its output power and power generation efficiency; the more parallel the incident angle of the sun is to the plane of the photovoltaic panel, the greater the effective solar radiation received by the photovoltaic panel, and the higher the power generation efficiency; therefore, tracking the position of the sun and dynamically adjusting the angle of the photovoltaic panel can significantly improve the power generation efficiency, especially when the position of the sun is constantly changing; Based on the technical principle of photovoltaic panels, the radiation power received by photovoltaic panels has a sinusoidal relationship with the incident angle, which can be expressed by the following formula: P = P0 × cos(θ); In the above formula, P is the solar radiation power actually received by the photovoltaic panel, P0 is the vertical incident power of the solar radiation, that is, the power when the incident angle is 0 degrees; θ is the incident angle of sunlight relative to the surface of the photovoltaic panel; when the incident angle θ is 0°, that is, when the sunlight shines vertically on the photovoltaic panel, the radiation power received by the photovoltaic panel is the maximum value; as the sun moves, the angle θ gradually changes), the value of cos(θ) decreases, causing the radiation power received by the photovoltaic panel to gradually decrease, and finally reaching the power generation dead zone, the photovoltaic panel fails to generate any power; Due to the rotation and revolution of the earth, the position of the sun (azimuth and altitude) changes continuously throughout the day, and the angle of incidence also changes accordingly. Especially in areas with significant seasonal changes, the solar altitude is low in winter and the angle of incidence is large, resulting in a significant reduction in the amount of solar radiation received by the photovoltaic panels. Without solar tracking, the photovoltaic panels can only receive part of the radiation energy, and the efficiency is greatly reduced. Further, as attached Figure 3 and attached Figure 4 , which is used to illustrate the angular relationship between the normal direction of the photovoltaic receiving surface and the sun; First, define the sun angle model; establish a three-axis coordinate system on the ground; the x-axis and y-axis are the two orthogonal axes in the horizontal direction, and the h-axis is the vertical axis perpendicular to the horizontal plane; the sun position is defined by two angles, namely the sun elevation angle θ s and the solar azimuth η s ; Elevation angle θ s The angle based on the ground represents the vertical angle from the horizon to the position of the sun in the sky; the greater the sun elevation angle, the higher the sun position; when the elevation angle θ s When the elevation angle is 0 degrees, the sun is on the horizon, and when the elevation angle is 90 degrees, the sun is directly above the observation origin; In addition, the azimuth angle η s Taking the north direction as the reference and measuring clockwise from the north direction, it indicates the angle of the horizontal projection of the sun on the horizon relative to the north; for example, the sun's azimuth in the east direction is 90 degrees, in the south direction it is 180 degrees, and in the west direction it is 270 degrees; Furthermore, the declination angle δ and the time angle ω are introduced for calculation; wherein the calculation method of the declination angle δ is: ; In the above formula, n is the day of the date. When January 1 is set, n=1, and so on. The above formula introduces the time and date (year, month, day, hour, minute and second) and the value of the longitude (φ) of the geographical location indicator to calculate the elevation angle θ of the sun. s and azimuth η s , the sun vector is calculated by the following formula; ; ; ; Among them, θ z The zenith angle is the angle between the sun and the direction perpendicular to the ground, ranging from 0° to 90°. When the sun is directly above, the zenith angle is 0°; when the sun is on the horizon, the zenith angle is 90°. Through the above calculations, the power supply device can instantly calculate the position and angle of the sun based on the known geographical location and the time, and use this as a control to adjust the angle orientation of the photovoltaic receiving surface of the photovoltaic assembly and the orientation orientation of the mobile chassis; As attached Figure 4 As shown, in a preferred embodiment, the mobile assembly includes a mobile chassis 40, a drive controller 44 and a tracking controller 46; the mobile assembly 40 is used to carry the photovoltaic assembly and the energy storage assembly, and provide power to drive the power supply device to perform overall displacement or rotation; The mobile chassis 40 includes a driving mechanism 42 and a housing; the driving mechanism 42 is fixedly installed inside the housing; and the housing is also used to load and protect the photovoltaic components and energy storage components; The driving mechanism 42 is communicatively connected to the driving controller, and the power management module is electrically connected to the energy storage component; The driving mechanism may include two or more driving motors as drivers; preferably, the mobile chassis includes left and right wheel groups, and the left and right wheel groups are respectively controlled by independent driving motors; each motor adjusts its output power through a driving controller, and the driver realizes the steering and movement of the chassis by controlling the speed difference between the left and right wheel groups; the above settings allow the mobile chassis to perform precise linear motion and rotational motion, and adapt to the friction and slope conditions of different ground surfaces; optionally, the mobile chassis may adopt a wheeled structure or a crawler structure to ensure that the equipment maintains stable movement on various terrains; the driving controller can make real-time adjustments based on the motor feedback signal to ensure that the motor output matches the current load and terrain conditions; Preferably, the drive controller can be managed by a central processing unit (CPU), and dynamically adjust the movement state of the chassis by receiving data provided by multiple sensors arranged on the tracking controller; preferably, the sensor includes an integrated three-axis gyroscope, an accelerometer and a force sensor; the three-axis gyroscope is used to monitor the tilt and rotation angle of the device during movement to ensure that the chassis remains stable under different terrain conditions; the accelerometer detects the acceleration change of the chassis to correct the inertial effect during starting or braking; the force sensor is used to sense the push and pull force applied by the user, so as to judge the user's operation intention; the drive controller adjusts the motor output power according to the sensor data and the real-time position and speed information of the chassis to realize the power assist function; when the user pushes or pulls the device, the system appropriately adjusts the output of the motor according to the size of the thrust or pull force to ensure that the device can assist the user to move smoothly; Preferably, the drive controller includes running a movement algorithm to combine the position sensor and the slope sensor to calculate the movement path of the chassis on different terrains; the slope sensor provides real-time feedback of the current ground slope angle, and the system adjusts the motor output according to the slope to ensure that the device provides sufficient power when going uphill, and reduces the output to prevent sliding when going downhill; the positioning sensor provides the global position data of the device, combined with the preset path planning algorithm, to control the chassis to move or rotate along the specified route; the movement algorithm can also adjust the movement speed of the chassis according to the terrain conditions to ensure stable operation in complex environments; Preferably, the power management module is integrated inside the chassis and electrically connected to the energy storage component; the power management module is configured to provide a stable power supply to the drive mechanism, the drive controller and the sensor module; preferably, the power management module is responsible for detecting the battery status and protecting the battery to avoid battery loss caused by excessive discharge; preferably, the power management module also automatically adjusts the movement mode of the chassis to adapt to the battery status by calculating the remaining capacity of the battery; According to actual measurements, the power supply device adopts dual-axis adjustment function and is compared with the fixed working conditions. For the same day, if the incident angle is kept at 0° dynamically and the solar radiation is 1000W / m² for the same photovoltaic receiving area: (1) The received power of a fixed-angle photovoltaic panel (assuming an incident angle of 45°) is approximately 707 W / m²; (2) When the photovoltaic module with dual-axis adjustment function disclosed in the present invention is used, the received power can reach more than 950W / m², and the power generation efficiency is improved by about 34%.

[0014] Embodiment 2: This embodiment should be understood to include at least all the features of any of the above embodiments, and further improve upon them; In a preferred embodiment, the mobile chassis provides a user with an assistive force for moving the power supply device; When the user starts to push or pull the device, the sensor module (such as an accelerometer or a force sensor) will monitor the force applied by the user in real time; the sensor is responsible for sensing the user's pushing or pulling force and sending this information to the drive controller; the drive controller will determine whether the user's current force is sufficient based on the preset logic. If it detects that the user's pushing or pulling force is insufficient, the controller will send a signal to start the drive motor and start to intervene to provide auxiliary power for the mobile chassis; at this time, the drive motor is connected to the wheels or track system of the chassis to transmit the auxiliary power to the ground, so that the user can easily move the entire device with less force when pushing or pulling the device; When the user stops pushing or pulling or detects that the force applied by the user is sufficient to maintain movement, the controller will turn off the drive motor and put the power assist function into standby mode; this working mode ensures that the power assist system is activated only when needed, thus avoiding unnecessary energy consumption; Preferably, the power-assist system includes two working modes, namely, automatic power-assist mode and manual power-assist mode; in automatic power-assist mode, the power-assist system will automatically adjust the power-assist strength according to the detection of the sensor, and the user only needs to apply a slight thrust to complete most of the movement work; in manual power-assist mode, the user can manually start or stop the power-assist system through a control interface such as a button or a mobile application, and autonomously control the start and stop of the power-assist; In a preferred embodiment, the target total output torque T of one or more driving motors configured to drive the mobile chassis is calculated by the following calculation formula: ; In the above formula, P max E is the rated maximum output power of one or more drive motors; bett is the output stage coefficient based on electricity; E bett is a piecewise function, and a preferred method for obtaining its value is: ; σ is the weight influence coefficient, which is used to adjust the contribution of weight to the power output and is set by relevant technicians or users; W total is the total weight of the current power supply device; W max is the maximum weight of the power supply device; S is the slope influence coefficient, which reflects the influence of uphill or downhill on the assist force and can be set by relevant technical personnel; θ slope is the current ground slope angle, which can be measured by a gyro sensor separately arranged in the mobile chassis 10; γ dir is the angle between the slope and the moving direction; R is the radius of the tire configured for the mobile chassis; By reasonably setting the output timing and output value of the auxiliary power, it can help the user to move the power supply device without having to configure an overly powerful mobile power system for the power supply device, thereby effectively simplifying the configuration of the power supply device and reducing its production cost; Through the solar tracking system, the photovoltaic panel can automatically adjust its angle so that it maintains a smaller incident angle with the sunlight, thereby receiving as much radiation energy as possible; in the above embodiment, the telescopic arm and the mobile chassis of the photovoltaic module realize dual-axis adjustment functions around the vertical axis and the horizontal axis, so that the photovoltaic receiving surface always remains at an optimal incident angle state.

[0015] Embodiment 3: This embodiment should be understood to include at least all the features of any of the above embodiments, and further improve upon them; For example, as shown in the attached Figure 5 As shown, an implementation of the computer system 500 used by the drive controller is described; the computer system 500 can be used to identify and determine the data storage, calculation and result output process of each working module in the system; Illustratively, computer system 500 includes a bus 502 or other communication mechanism for communicating information, one or more processors 504 coupled to bus 502 for processing information; processor 504 may be, for example, one or more general-purpose microprocessors; The computer system 500 also includes a main memory 506, such as a random access memory (RAM), a cache, and / or other dynamic storage device, coupled to the bus 502 for storing information and instructions to be executed by the processor 504; the main memory 506 may also be used to store temporary variables or other intermediate information during the execution of instructions to be executed by the processor 504; these instructions, when stored in a storage medium accessible to the processor 504, present the computer system 500 as a special-purpose machine customized to perform the operations specified in the instructions; The computer system 500 may also include a read-only memory (ROM) 508 or other static storage device coupled to the bus 502 for storing static information and instructions for the processor 504; a storage device 510 such as a disk, an optical disk, or a USB drive (flash drive) will be coupled to the bus 502 for storing information and instructions; And further, coupled to the bus 502 may also include a display 122 for displaying various information, data, media, etc., an input device 514 for allowing a user of the computer system 500 to control, manipulate, and / or interact with the computer system 500; A preferred way to interact with the management system may be through a cursor control device 516, such as a computer mouse or similar control / navigation mechanism; Furthermore, the computer system 500 may also include a network device 518 coupled to the bus 502; wherein the network device 518 may include, for example, a wired network card, a wireless network card, a switching chip, a router, a switch, and other components; In general, the terms "engine", "component", "system", "database", etc., as used herein, may refer to logic embodied in hardware or firmware, or to a collection of software instructions, possibly with entry and exit points, written in a programming language such as Java, C, or C++; software components may be compiled and linked into executable programs, installed in a dynamic link library, or may be written in an interpreted programming language (e.g., BASIC, Perl, or Python); it should be understood that software components may be callable from other components or from themselves, and / or may be called in response to detected events or interrupts; Software components configured to execute on a computing device may be provided on a computer-readable medium, such as a compact disc, digital video disc, flash drive, diskette, or any other tangible medium, or as a digital download (and may be initially stored) in a compressed or installable format that requires installation, decompression, or decryption prior to execution); such software code may be stored in part or in whole on a memory device of the executing computing device for execution by the computing device; software instructions may be embedded in firmware, such as an EPROM; it is also understood that hardware components may be composed of connected logic units (such as gates and flip-flops), and / or may be composed of programmable units (such as programmable gate arrays or processors); Computer system 500 includes the techniques described herein that may be implemented using custom hardwired logic, one or more ASICs or FPGAs, firmware, and / or program logic that, in combination with the computer system, renders computer system 500 a special-purpose computing device; According to one or more embodiments, the techniques herein may be performed by computer system 500 in response to processor 504 executing one or more sequences of one or more instructions contained in main memory 506; such instructions may be read into main memory 506 from another storage medium, such as storage device 510; execution of the sequences of instructions contained in main memory 506 causes processor 504 to perform the process steps described herein; in alternative embodiments, hard-wired circuitry may be used in place of or in combination with software instructions; As used herein, the term "non-transitory media" and similar terms refer to any media that store data and / or instructions that cause a machine to operate in a specific manner; such non-transitory media may include non-volatile media and / or volatile media; non-volatile media include, for example, optical or magnetic disks, such as storage device 510; volatile media include dynamic memory, such as main memory 506; Among them, common forms of non-transitory media include, for example, floppy disks, diskettes, hard disks, solid-state drives, magnetic tapes or any other magnetic data storage medium, CD-ROMs, any other optical data storage medium, any physical medium having a pattern of holes, RAM, PROM and EPROM, FLASH-EPROM, NVRAM, any other memory chip or cartridge, and network versions thereof; Non-transient media are distinct from transmission media but may be used in conjunction with transmission media; transmission media participate in the transmission of information between non-transient media; for example, transmission media include coaxial cables, copper wires, and optical fibers, including the wires that make up bus 502; transmission media may also take the form of sound waves or light waves, such as radio waves and infrared data communications.

[0016] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems and devices discussed above are examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from the order described, and / or various components may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configurations may be combined in a similar manner. In addition, the elements therein may be updated as the technology develops, i.e., many elements are examples and do not limit the scope of the present disclosure or claims.

[0017] Specific details are given in the specification to provide a thorough understanding of the exemplary configurations including implementations. However, the configurations may be practiced without these specific details. For example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary details to avoid obscuring the configurations. This description provides only example configurations and does not limit the scope, applicability, or configurations of the claims. On the contrary, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.

[0018] In summary, it is intended that the above detailed description is considered to be illustrative rather than restrictive, and it should be understood that the above embodiments should be understood to be only used to illustrate the present invention and not to limit the scope of protection of the present invention. After reading the contents of the present invention, the technician can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. A portable power supply device based on a solar charger, characterized in that: The power supply device comprises: a photovoltaic component, an energy storage component and a mobile component; The photovoltaic assembly includes a plurality of photovoltaic panels, a plurality of frames, a plurality of linear actuators, a pitch angle adjustment mechanism, and related circuits for photovoltaic panel power transmission and for linear actuator power transmission; The energy storage component is installed inside the mobile component and includes an electric converter, a battery, and an input / output circuit; The mobile component includes a mobile chassis, a drive controller and a tracking controller; the mobile component is used to carry the photovoltaic component and the energy storage component, and provide power to drive the power supply device to move or rotate as a whole; Wherein, the plurality of support frames are used to frame and fix the corresponding photovoltaic panels; the support frames are driven by the plurality of linear actuators to implement transformation, so as to realize the overall expansion and contraction deformation of the photovoltaic assembly; the photovoltaic receiving surface is formed by the receiving surface of one or more photovoltaic panels exposed to the outside; The pitch angle adjustment mechanism includes a telescopic arm and a driving mechanism; the movable end of the telescopic arm is installed at the bottom of the photovoltaic component, and the fixed end of the telescopic arm is fixed to the mobile chassis, and the normal angle of the photovoltaic receiving surface is changed by changing the relative angle of the joint of the telescopic arm; and after the photovoltaic component shrinks and deforms, the photovoltaic component is lowered by the telescopic arm so that the photovoltaic component as a whole covers the surface of the mobile chassis.

2. The power supply device according to claim 1, characterized in that: The multiple frames in the photovoltaic assembly include a main frame, which is arranged in the center, and sub-frames are arranged above, below, on the left and on the right, respectively, and each of the sub-frames is connected to the main frame through a slide rail mechanism; the multiple photovoltaic panels are respectively installed on the main frame and the four sub-frames; In addition, triangular frames are respectively arranged on the left and right sub-frames; each of the triangular frames is connected to the left and right sub-frames through a folding mechanism; each of the triangular frames is installed with a photovoltaic panel of a corresponding shape; Through the above arrangement, the sub-frames located on the upper, lower, left and right sides of the main frame slide and are received inside the main frame through the slide rail mechanism, and completely cover the main frame in a stacked state.

3. The power supply device according to claim 2, characterized in that: The upper and lower edges of the main frame are respectively provided with slide rails corresponding to the sub-frames on the left and right sides; the left and right edges of the main frame are respectively provided with slide rails corresponding to the sub-frames on the upper and lower ends; Furthermore, at least one linear actuator is configured for each sub-frame to drive the sub-frame to slide along the slide rail configured thereon, so as to drive the sub-frame to expand and contract relative to the main frame.

4. The power supply device according to claim 3, characterized in that: The tracking controller includes a three-axis gyro sensor and a positioning sensor; the three-axis gyro sensor is arranged on the back of the main frame, and measures the pitch angle of the photovoltaic receiving surface with the pitch angle of the main frame; the positioning sensor is used to determine the global longitude and latitude of the power supply device; The tracking controller calculates the solar elevation angle and the solar azimuth angle according to the acquired pitch angle data of the photovoltaic receiving surface and the current global longitude and latitude data; and controls the telescopic arm to adjust the pitch angle of the photovoltaic receiving surface by an automatic program; And, the tracking controller is coupled to the driving controller circuit; The driving controller cooperates with the tracking controller to control the mobile chassis to rotate through an automatic program to change the horizontal orientation of the photovoltaic receiving surface.

5. The power supply device according to claim 4, characterized in that: The mobile chassis includes at least one drive motor and a sensor; the drive motor outputs power to drive the mobile chassis to move and / or rotate; the sensor detects the user's push and pull actions on the power supply device, and the drive controller controls the drive motor to output an auxiliary force of a specified torque according to the user's push and pull direction, so as to intervene and assist the user in pushing and pulling actions.

6. The power supply device according to claim 5, characterized in that: The mobile chassis includes calculating the output torque of the drive motor based on the remaining power of the power supply device, the total weight of the power supply device, the slope of the current position, and the relationship between the travel direction and the slope.

7. The power supply device according to claim 6, characterized in that: An indicator light is provided on the surface of the power supply device for indicating to the user the operation of adjusting the directionality of the power supply device.

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