Photovoltaic power supply device for an electrically driven bulk carrier

Abstract

The utility model relates to the technical field of ship engineering. Provide a kind of photovoltaic energy supply device for electric gathering and distributing cargo ship, it include: pedestal, horizontal rotating mechanism, angle adjusting mechanism, photovoltaic module and sensing component, the horizontal rotating mechanism is set on the pedestal, the angle adjusting mechanism is set on the horizontal rotating mechanism, the photovoltaic module is set on the angle adjusting mechanism, the sensing component is set on the front of the photovoltaic module, the sensing component is connected with the photovoltaic module;Wherein, the horizontal rotating mechanism is used to adjust the horizontal alignment angle of the angle adjusting mechanism;The angle adjusting mechanism is used to adjust the pitch angle of the photovoltaic module;The sensing component is used to collect environmental data and ship data. Solve the tracking accuracy and stability insufficient, ship space adaptability poor, system integration synergy weak caused by the problem of limited power generation gain and poor reliability of existing ship photovoltaic power supply system.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering technology, and more specifically, to a photovoltaic power supply device for an electric cargo ship. Background Technology

[0002] With increasingly stringent energy conservation and emission reduction requirements in the global shipping industry and the rapid development of new energy technologies, electric ships, especially electric bulk carriers, are becoming an important direction for green shipping development due to their advantages such as zero emissions and low noise. To extend the cruising range of electric ships, reduce dependence on shore power, and lower operating costs, the need for auxiliary power supply using clean and renewable energy sources is becoming increasingly urgent. Solar photovoltaic power generation technology, with its clean and pollution-free characteristics, ease of access, and relatively simple maintenance, is considered one of the ideal choices for auxiliary energy supply for ships.

[0003] While some existing technologies have attempted to install photovoltaic panels on ships, or even use simple single-axis tracking devices, they generally suffer from the following limitations: insufficient tracking accuracy and stability, making it difficult to effectively offset the dual effects of the ship's own motion and changes in the sun's position; structural design failing to fully consider the space constraints of the ship; and low system integration, with the coordination of sensing, driving, and control components needing improvement, resulting in limited overall power generation gain and challenges to reliability. Utility Model Content

[0004] The purpose of this utility model is to provide a photovoltaic power supply device for electric cargo ships, which aims to solve the problems of insufficient tracking accuracy and stability, poor adaptability to ship space, weak system integration and coordination, resulting in limited power generation gain and poor reliability of existing ship photovoltaic power supply systems.

[0005] This utility model is achieved through the following technical solution:

[0006] A photovoltaic power supply device for an electric cargo ship includes: a base, a horizontal rotation mechanism, an angle adjustment mechanism, a photovoltaic module, and a sensing component. The horizontal rotation mechanism is disposed on the base, the angle adjustment mechanism is disposed on the horizontal rotation mechanism, the photovoltaic module is disposed on the angle adjustment mechanism, and the sensing component is disposed on the front of the photovoltaic module and connected to the photovoltaic module.

[0007] The horizontal rotation mechanism is used to adjust the horizontal azimuth angle of the angle adjustment mechanism; the angle adjustment mechanism is used to adjust the pitch angle of the photovoltaic module; and the sensing component is used to collect environmental data and ship data.

[0008] Optionally, the horizontal rotation mechanism includes a first rotation component and a first drive component, the first drive component is connected to the first rotation component, the first drive component is disposed on the base, and the angle adjustment mechanism is disposed on the first rotation component.

[0009] Optionally, the base is provided with a first mounting cavity, and the first rotating component is disposed in the first mounting cavity.

[0010] Optionally, the angle adjustment mechanism includes a rotating base, a second drive assembly, and a second rotation assembly. The rotating base is connected to the horizontal rotation mechanism, the second drive assembly is disposed on the rotating base, the second rotation assembly is connected to the second drive assembly, and the photovoltaic module is connected to the second rotation assembly.

[0011] Optionally, the rotary table is provided with a second mounting cavity, and the second drive assembly is disposed in the second mounting cavity.

[0012] Optionally, the system also includes a support frame connected to the second rotating assembly, with the photovoltaic module mounted on the support frame.

[0013] Optionally, the bracket is provided with a mounting groove corresponding to the photovoltaic module, and the photovoltaic module is detachably connected to the bracket.

[0014] Optionally, there are two second rotating components, which are symmetrically arranged on both sides of the rotating base. The bracket is connected to the two second rotating components, and the axis of symmetry of the bracket coincides with the plane of symmetry of the two second rotating components.

[0015] Optionally, the photovoltaic module is characterized by having a plurality of photovoltaic modules, and the plurality of photovoltaic modules are distributed in an array.

[0016] Optionally, the system further includes a control terminal, which is connected to the horizontal rotation mechanism, the angle adjustment mechanism, the photovoltaic module, and the sensing component. The control terminal receives environmental data collected by the sensing component, generates control commands based on the environmental data, sends the control commands to the horizontal rotation mechanism and / or the angle adjustment mechanism, drives the first driving component and / or the second driving component to adjust the horizontal azimuth and / or pitch angle of the photovoltaic module, monitors the power generation status of the photovoltaic module, and coordinates the operation of several photovoltaic modules.

[0017] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0018] By installing sensing components on the front of the photovoltaic modules, changes in the sun's position and the ship's own motion attitude can be accurately sensed in real time. Combined with the coordinated linkage of the horizontal rotation mechanism and the angle adjustment mechanism, a dual-axis tracking and adjustment system is formed. Compared with the simple single-axis tracking devices in existing technologies, this design can effectively offset the orientation deviations caused by changes in roll, pitch, and course during the ship's navigation, achieving dynamic and accurate tracking of sunlight and significantly improving the light energy capture efficiency of the photovoltaic modules.

[0019] Addressing the challenges of limited deck space and complex equipment layout on ships, this device employs a modular integrated design. The structural layout of the base and horizontal rotation mechanism fully considers the space constraints of the ship's superstructure. The integrated design of the photovoltaic modules and sensing components avoids the pipeline redundancy problems of traditional distributed installations, enabling the entire device to flexibly adapt to the deck layouts of electric cargo ships of different tonnages. It is particularly suitable for installation in open areas such as above the cargo hold area of ​​cargo ships, maximizing the arrangement of photovoltaic modules within limited space without affecting normal ship operations and personnel passage.

[0020] The sensing components, along with the horizontal rotation mechanism and angle adjustment mechanism, form a closed-loop control system. By collecting solar irradiance, incident angle, and ship motion parameters in real time, and processing them through intelligent algorithms, the system automatically adjusts the azimuth and pitch angles of the photovoltaic modules, achieving coordinated control throughout the entire process of "sensing-computation-execution." Compared to the independent operation of sensing, actuation, and control components in existing technologies, this device significantly improves system integration, reduces signal delays and control deviations between modules, and effectively reduces the risk of equipment failure caused by harsh environments such as ship vibration and wave impact. Simultaneously, the modular design facilitates later maintenance and component replacement. Combined with the self-cleaning coating technology of the photovoltaic modules, this further enhances the long-term operational reliability of the entire power supply device and reduces maintenance costs during ship operation.

[0021] Through efficient photovoltaic power supply systems, electric bulk carriers can reduce their dependence on shore power, extend their cruising range, and reduce the frequency of diesel generator use, thereby achieving a significant reduction in ship operating costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic power supply device for an electric cargo ship according to an embodiment of the present utility model.

[0023] Figure 2 This is a schematic front view of the photovoltaic power supply device for an electric cargo ship according to an embodiment of the present utility model.

[0024] Figure 3 This is a right-side structural schematic diagram of a photovoltaic power supply device for an electric cargo ship according to an embodiment of the present utility model.

[0025] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0026] Icons: 1-Base, 2-First rotating component, 3-Rotator, 4-First driving component, 5-Second driving component, 6-Second rotating component, 7-Bracket, 8-Photovoltaic component, 9-Sensing component. Detailed Implementation

[0027] The following is a detailed description of the embodiments, in conjunction with the accompanying drawings.

[0028] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 A photovoltaic power supply device for an electric cargo ship includes: a base 1, a horizontal rotation mechanism, an angle adjustment mechanism, a photovoltaic module 8, and a sensing component 9. The horizontal rotation mechanism is mounted on the base 1, the angle adjustment mechanism is mounted on the horizontal rotation mechanism, the photovoltaic module 8 is mounted on the angle adjustment mechanism, and the sensing component 9 is mounted on the front of the photovoltaic module and connected to the photovoltaic module 8. The horizontal rotation mechanism is used to adjust the horizontal azimuth angle of the angle adjustment mechanism; the angle adjustment mechanism is used to adjust the pitch angle of the photovoltaic module 8; and the sensing component 9 is used to collect environmental data and ship data.

[0029] In some embodiments, the base 1 can be made of corrosion-resistant stainless steel or aluminum alloy frame, with the bottom fixed to the ship's deck by bolts. Reinforcing ribs are installed inside the frame to enhance its resistance to impact and vibration, adapting to the turbulent environment during ship navigation. The base 1 can adopt a modular design, reserving installation interfaces for horizontal rotation mechanisms (such as bearing seats, guide rails, etc.), and integrating cable trays to house the control and power lines of the sensing components and drive mechanisms, preventing exposed cables from affecting ship operational safety.

[0030] The horizontal rotation mechanism can employ a combination of a servo motor and a worm gear reducer. The motor is equipped with an absolute encoder to achieve precise angle feedback (accuracy ≤ 0.1°). The worm gear drive has a self-locking characteristic, preventing the mechanism from rotating on its own when the ship is rocking. The horizontal rotation mechanism receives commands from the controller and adjusts the horizontal azimuth angle in real time based on the solar azimuth angle and the ship's heading data, ensuring that the photovoltaic modules always face the direction of the main sunlight.

[0031] The angle adjustment mechanism can be driven by an electric push rod or a hydraulic cylinder. The push rod stroke is designed according to the size of the photovoltaic module (e.g., pitch angle adjustment range of -15° to 60°). It is equipped with a tension sensor to monitor the push rod load in real time to avoid overload damage. Combined with the ship attitude data (e.g., roll angle and pitch angle) collected by the sensor component 9, the controller algorithm dynamically compensates for the pitch angle deviation caused by the ship's rolling motion, ensuring that the photovoltaic module is always perpendicular to the sunlight.

[0032] The photovoltaic module 8 can employ segmented flexible photovoltaic panels (such as cadmium telluride thin-film batteries). Each photovoltaic panel is connected to an angle adjustment mechanism via a hinge, allowing for independent, small-range angle adjustments to accommodate localized deformation of the ship or minor structural bending caused by wind and waves. The surface of the photovoltaic panel is covered with high-transmittance, impact-resistant glass, and the edges are sealed with silicone to prevent water intrusion. A temperature sensor is installed on the back, activating a wind-cooling system (integrated inside the angle adjustment bracket) when the temperature exceeds a threshold. The photovoltaic panels are connected in parallel via quick-connect waterproof connectors, with the output end connected to the ship's DC bus. An MPPT (maximum power point tracking) controller is also integrated to improve energy conversion efficiency.

[0033] Sensing component 9 includes a solar tracking sensor, a ship attitude sensor, and an environmental sensor. The solar tracking sensor can employ a four-quadrant photodiode array, mounted on the edge of the photovoltaic module, to detect the deviation of the solar incidence angle in real time. The ship attitude sensor integrates a MEMS gyroscope and accelerometer, installed inside the base, to monitor the ship's roll, pitch, and heading angle data in real time. The environmental sensors include a illuminance meter, an anemometer, and a thermometer, used to determine weather conditions (such as automatically adjusting the photovoltaic module to a safe angle in strong winds). Sensor data is transmitted to a central controller (industrial-grade PLC or embedded microcontroller) via a CAN bus. The controller fuses multi-source data using a Kalman filter algorithm to generate horizontal rotation and angle adjustment commands. A dual-loop PID control (position loop + velocity loop) is employed, with independent closed-loop control for the horizontal rotation mechanism and the angle adjustment mechanism. Combined with a feedforward compensation algorithm, the solar trajectory and ship sway trends are predicted to improve the tracking response speed.

[0034] In some embodiments, the horizontal rotation mechanism includes a first rotation component 2 and a first drive component 4. The first drive component 4 is connected to the first rotation component 2 and is mounted on a base 1. An angle adjustment mechanism is mounted on the first rotation component 2. The first rotation component 2 can be a platform or shaft structure capable of rotating around a vertical axis (perpendicular to the ship's deck). The first rotation component 2 can be directly mounted on the base 1 (e.g., via a large thrust bearing or slewing bearing), constituting the moving part of the entire horizontal rotation mechanism. The first drive component 4 (specifically, the output end of its reducer, such as a worm shaft) is connected to the first rotation component 2 (such as a worm gear ring or gear at the bottom of the turntable) via a coupling, gear, or direct meshing, thereby accurately transmitting and converting the rotational motion of the motor into the horizontal rotational motion of the rotation component. The angle adjustment mechanism is located on the upper surface of the first rotation component 2 (rotating platform). This means that when the first drive component 4 drives the first rotation component 2 to rotate horizontally, the entire angle adjustment mechanism mounted on it and the photovoltaic module 8 will rotate synchronously, achieving adjustment of the horizontal azimuth angle.

[0035] In some embodiments, a first mounting cavity is provided within the base 1, and a first rotating component 2 is disposed within the first mounting cavity. The base 1 is made of corrosion-resistant stainless steel or aluminum alloy frame (mentioned in the background art), and the first mounting cavity (preferably cylindrical, to accommodate the circular motion trajectory of horizontal rotation) is machined inside the frame through processes such as cutting and casting. The inner wall of the cavity is provided with mounting interfaces such as annular steps and threaded holes, and reinforcing ribs are integrated at the bottom (to enhance impact resistance), and a sealing groove is reserved at the top edge (optionally equipped with a dustproof and waterproof sealing ring). If the first rotating component 2 is a slewing bearing (such as a single-row four-point contact ball slewing bearing), its fixed seat ring is fastened to the annular step on the inner wall of the cavity with bolts, the rotating seat ring extends upward, and the top surface is connected to the bottom bracket of the angle adjustment mechanism through a flange or bolts; if the first rotating component 2 is a combination of "worm gear ring + thrust bearing", the lower ring of the thrust bearing is fixed to the bottom of the cavity, the upper ring is connected to the turntable, the bottom of the turntable is machined with a worm gear ring, which meshes with the worm of the first drive component 4 (servo motor + worm), and the top surface of the turntable is connected to the angle adjustment mechanism. The height of the cavity matches the thickness of the rotating component to ensure that the rotating component is completely contained within it, and the connection surface between the top and the angle adjustment mechanism is flat; the side of the base 1 has a reserved cable hole that passes through the internally integrated cable trough to accommodate the power cable and signal cable of the first drive component.

[0036] In some embodiments, the angle adjustment mechanism includes a rotating base 3, a second drive assembly 5, and a second rotating assembly 6. The rotating base 3 is connected to the horizontal rotating mechanism, the second drive assembly 5 is mounted on the rotating base 3, the second rotating assembly 6 is connected to the second drive assembly 5, and the photovoltaic module 8 is connected to the second rotating assembly 6. The rotating base 3 can be cast or welded from a lightweight high-strength alloy (such as 6061-T6 aluminum alloy), and its bottom is bolted to the first rotating assembly 2 (such as a rotating platform) of the horizontal rotating mechanism via a flange. The second drive assembly 5 can be a servo electric push rod (or a compact hydraulic cylinder) with an IP67 protection rating. The push rod stroke is precisely calculated according to the pitch angle range (-15° to 60°) of the photovoltaic module 8 (e.g., a stroke of 300mm). The push rod has a built-in absolute encoder (accuracy ±0.05°) to provide real-time feedback on the push rod's extension and retraction position; an integrated tension sensor (range 0-5kN) monitors the load force on the push rod and triggers emergency stop protection in case of overload; the motor driver supports CAN bus communication and receives pitch angle commands. The second rotating component 6 can adopt a four-bar linkage or a crank-slider mechanism to convert the linear motion of the push rod into the rotational motion of the photovoltaic module 8.

[0037] In some embodiments, a second mounting cavity is provided within the transducer 3, and the second drive assembly 5 is disposed within the second mounting cavity. By integrating the second mounting cavity inside the transducer 3, the second drive assembly 5 is completely embedded into the transducer body, saving deck space compared to traditional external drive structures, which is particularly suitable for the compact layout of cargo stacking areas on the decks of electric cargo ships. By completely accommodating the electric push rod inside the transducer, the mounting plane of the photovoltaic module 8 can be closer to the ship's deck, lowering the overall center of gravity and improving ship stability.

[0038] In some embodiments, a bracket 7 is also included, which is connected to the second rotating component 6, and the photovoltaic module 8 is mounted on the bracket 7. The bracket 7 provides an independent installation interface for segmented flexible photovoltaic panels (such as cadmium telluride thin-film batteries). Each photovoltaic panel is connected to the bracket via a hinge and can be independently adjusted within a small range. This design can effectively adapt to local deformations (such as slight deck bending) or structural vibrations caused by wind and waves during ship navigation, avoiding stress concentration or mechanical damage caused by ship rolling in traditional integral photovoltaic panels, thus improving module durability. The bracket 7 is linked with the second rotating component 6 (such as a four-bar linkage mechanism), and combined with the electric push rod / hydraulic cylinder drive of the angle adjustment mechanism, it can dynamically adjust the pitch angle of the photovoltaic module according to the ship attitude sensor (roll angle, pitch angle) data, offsetting the influence of ship rolling on the light-gathering angle, ensuring that the photovoltaic panel is always perpendicular to the sunlight, and improving power generation efficiency.

[0039] In some embodiments, the bracket 7 is provided with mounting slots corresponding to the photovoltaic modules 8, and the photovoltaic modules 8 are detachably connected to the bracket 7. Standardized mounting slots and detachable connections (such as quick-connect interfaces, bolt fixing, etc.) allow for independent removal and replacement of individual photovoltaic panels without affecting other components, significantly shortening maintenance time and reducing downtime losses. The mounting slots can integrate concealed cable trays to house the quick-connect waterproof connectors and power cords of the photovoltaic panels, avoiding the risk of tangling or scratching caused by exposed cables, complying with marine safety regulations, and improving system neatness and corrosion resistance (e.g., stainless steel cable trays with a sealed design).

[0040] In some embodiments, there are two second rotating components 6, symmetrically arranged on both sides of the rotating base 3. A bracket 7 is connected to the two second rotating components 6, and the axis of symmetry of the bracket 7 coincides with the plane of symmetry of the two second rotating components 6. During navigation, ships experience complex movements such as rolling and pitching due to wind and waves. The symmetrically arranged second rotating components 6 can form a bidirectional force couple balance through synchronous drive (such as electric push rods or hydraulic cylinders), avoiding structural imbalance or deformation caused by unilateral force. For example, when the ship rolls to the left, the rotating components on both sides can dynamically adjust the push rod stroke to synchronously compensate for pitch angle deviation, maintain the stability of the photovoltaic module's attitude, and reduce tracking errors caused by ship swaying. The symmetrical structure evenly distributes the weight of the photovoltaic module and external forces such as wind loads to both sides of the rotating base 3, reducing the load pressure on individual drive components, avoiding the "single-point overload" risk that may occur in traditional single-drive structures, extending the service life of mechanical components (such as push rods and bearings), improving the system's resistance to shock and vibration, and adapting to the ship's turbulent environment.

[0041] In some embodiments, there are multiple photovoltaic modules 8, distributed in an array. Through array-based layout (such as row-and-column arrangement), photovoltaic modules can be densely arranged within the limited space of a ship's deck, significantly increasing the total light-receiving area and directly improving the overall power generation of the system. Compared to a single large-area photovoltaic panel, the array distribution can flexibly adapt to the deck contour (such as the top of the cabin, side platforms, etc.), filling irregular spaces and avoiding the "space waste" problem of traditional monolithic designs. Each photovoltaic module in the array achieves independent or collaborative control (such as group tracking) through a horizontal rotation mechanism and an angle adjustment mechanism. For example, when the ship rolls, the modules on both sides of the array can dynamically adjust their pitch angle through symmetrical second rotating components 6, forming "complementary compensation" to ensure that each module is as perpendicular to the sunlight as possible, reducing the overall power generation attenuation caused by changes in ship attitude.

[0042] In some embodiments, a control terminal is also included, which is connected to the horizontal rotation mechanism, the angle adjustment mechanism, the photovoltaic module 8, and the sensing component 9. The control terminal receives environmental data collected by the sensing component 9, generates control commands based on the environmental data, sends the control commands to the horizontal rotation mechanism and / or the angle adjustment mechanism, drives the first drive component 4 and / or the second drive component 5 to adjust the horizontal azimuth and / or pitch angle of the photovoltaic module 8, monitors the power generation status of the photovoltaic module 8, and coordinates the operation of several photovoltaic modules 8. The control terminal collects multi-dimensional data in real time from the solar tracking sensor (four-quadrant photodiode array), the ship attitude sensor (MEMS gyroscope + accelerometer), and environmental sensors (light intensity, wind speed, temperature) via the CAN bus, and uses a Kalman filter algorithm to remove noise, achieving accurate perception of solar incident angle deviation, ship roll / pitch / heading angles, and environmental risks (such as strong winds). Based on the fused data, the control terminal drives the horizontal rotation mechanism (servo motor + worm gear) and the angle adjustment mechanism (electric push rod / hydraulic cylinder) through a dual closed-loop PID control algorithm (position loop + speed loop), adjusting the horizontal azimuth and pitch angles of the photovoltaic modules in real time. Simultaneously, by combining a feedforward compensation algorithm to predict the solar trajectory and ship sway trends, the mechanism's actions are adjusted in advance, significantly improving the tracking response speed (e.g., angle adjustment lag time reduced to ≤0.5 seconds). This solves the tracking error caused by the inability of traditional single-axis tracking devices to dynamically compensate for ship motion (traditional solutions have an error ≥5°, while this solution has an error ≤1°). When environmental sensors detect strong winds (e.g., wind speed >20m / s) or high temperatures (photovoltaic panel temperature >70℃), the control terminal automatically triggers a safety mode, adjusting the photovoltaic modules to the minimum windward angle (e.g., pitch angle zero) or activating the air-cooling system to avoid mechanical overload or efficiency degradation, improving the system's reliability in complex sea conditions.

Claims

1. A photovoltaic power supply device for an electric cargo ship, characterized in that, include: The base (1), horizontal rotation mechanism, angle adjustment mechanism, photovoltaic module (8) and sensing component (9) are provided. The horizontal rotation mechanism is provided on the base (1), the angle adjustment mechanism is provided on the horizontal rotation mechanism, the photovoltaic module (8) is provided on the angle adjustment mechanism, and the sensing component (9) is provided on the front of the photovoltaic module. The sensing component (9) is connected to the photovoltaic module (8). The horizontal rotation mechanism is used to adjust the horizontal azimuth angle of the angle adjustment mechanism; the angle adjustment mechanism is used to adjust the pitch angle of the photovoltaic module (8); and the sensing component (9) is used to collect environmental data and ship data.

2. The photovoltaic power supply device for electric cargo ships as described in claim 1, characterized in that, The horizontal rotation mechanism includes a first rotation component (2) and a first drive component (4). The first drive component (4) is connected to the first rotation component (2). The first drive component (4) is disposed on the base (1). The angle adjustment mechanism is disposed on the first rotation component (2).

3. The photovoltaic power supply device for electric cargo ships as described in claim 2, characterized in that, The base (1) is provided with a first mounting cavity, and the first rotating component (2) is disposed in the first mounting cavity.

4. The photovoltaic power supply device for electric cargo ships as described in claim 2, characterized in that, The angle adjustment mechanism includes a rotating base (3), a second drive component (5), and a second rotation component (6). The rotating base (3) is connected to the horizontal rotation mechanism. The second drive component (5) is disposed on the rotating base (3). The second rotation component (6) is connected to the second drive component (5). The photovoltaic module (8) is connected to the second rotation component (6).

5. The photovoltaic power supply device for electric cargo ships as described in claim 4, characterized in that, The rotating base (3) is provided with a second mounting cavity, and the second drive assembly (5) is disposed in the second mounting cavity.

6. The photovoltaic power supply device for electric cargo ships as described in claim 5, characterized in that, It also includes a bracket (7), which is connected to the second rotating component (6), and the photovoltaic module (8) is mounted on the bracket (7).

7. The photovoltaic power supply device for electric cargo ships as described in claim 6, characterized in that, The bracket (7) is provided with a mounting groove corresponding to the photovoltaic module (8), and the photovoltaic module (8) is detachably connected to the bracket (7).

8. The photovoltaic power supply device for electric cargo ships as described in claim 6, characterized in that, There are two second rotating components (6), which are symmetrically arranged on both sides of the rotating base (3). The bracket (7) is connected to the two second rotating components (6), and the axis of symmetry of the bracket (7) coincides with the plane of symmetry of the two second rotating components (6).

9. The photovoltaic power supply device for an electric cargo ship as described in any one of claims 1-8, characterized in that, There are several photovoltaic modules (8), and the several photovoltaic modules (8) are arranged in an array.

10. The photovoltaic power supply device for an electric cargo ship as described in any one of claims 4-8, characterized in that, It also includes a control terminal, which is connected to the horizontal rotation mechanism, the angle adjustment mechanism, the photovoltaic module (8), and the sensing component (9). The control terminal is used to receive environmental data collected by the sensing component (9), generate control commands based on the environmental data, send the control commands to the horizontal rotation mechanism and / or the angle adjustment mechanism, drive the first drive component (4) and / or the second drive component (5) to adjust the horizontal azimuth angle and / or pitch angle of the photovoltaic module (8), monitor the power generation status of the photovoltaic module (8), and coordinate the operation of several photovoltaic modules (8).

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