Marine modular hybrid power system capable of intelligently switching multiple modes

Abstract

The invention is suitable for the field of ship power, and provides a multi-mode intelligent switching ship modular hybrid power system which comprises a gasoline engine, a hybrid power box, a flexible coupler, a stern machine, a power battery, a PDU, a low-voltage battery, an intercooler, a torsion damper, an oil tank and a controller. The gasoline engine is connected with the hybrid power box through the torsional damper, the hybrid power box is connected with the stern machine through the flexible coupler, and a propeller is arranged on the stern machine. According to the invention, based on a core transmission structure of gasoline engine-torsional shock absorber-hybrid power box, the vibration isolation effect of the front buffer and the rear buffer is matched, so that the vibration transmission during the operation of the gasoline engine can be greatly weakened; meanwhile, the gasoline engine is completely closed in a pure electric driving mode, tail gas peculiar smell and engine noise are thoroughly eliminated, the ship comfort is remarkably improved, and the defects that traditional diesel oil / gasoline power is large in noise vibration and has oil smoke are effectively overcome.

Description

Technical Field

[0001] This invention belongs to the field of marine propulsion, and particularly relates to a modular hybrid power system for ships that can intelligently switch between multiple modes. Background Technology

[0002] The mainstream power solutions for existing small boats and yachts are diesel internal combustion engines or gasoline external engines, which generate a lot of noise and strong vibration during operation, and the exhaust gas has a noticeable odor. They cannot meet users' comfort requirements for "low noise, no vibration, and no oil smoke" for boats, especially affecting the user experience of recreational boats. While emerging pure electric propulsion systems can solve the comfort and environmental problems of traditional power, they are limited by the capacity of the power battery and the coverage of charging facilities, resulting in serious range anxiety and failing to meet the needs of ships for long-distance voyages or use in waters without charging facilities, thus limiting their practicality. Existing ship propulsion systems mostly adopt a distributed installation design, with components such as gasoline engines, drive units, and energy storage devices scattered throughout the ship's cabin. The connecting pipes and lines between these components are complex, which not only increases the difficulty and time required for installation but also makes it difficult to locate faults during subsequent maintenance. Furthermore, these systems are not adaptable to the cabin space of different types of small ships, resulting in poor compatibility. With the continuous delineation of "zero emission zones" and "low emission zones" in coastal, inland river and lake areas, traditional diesel / gasoline-powered ships are restricted from operation due to excessive emissions, while pure electric ships are difficult to fully replace due to insufficient range. Existing power solutions cannot meet both environmental policy requirements and actual navigation needs, resulting in limited operating range of ships. Therefore, a modular marine hybrid power system capable of intelligent switching between multiple modes is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a marine modular hybrid power system with multi-mode intelligent switching to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A modular hybrid power system for marine applications, capable of intelligent switching between multiple modes, includes a gasoline engine, a hybrid gearbox, a flexible coupling, a stern engine, a power battery, a power distribution unit (PDU), a low-voltage battery, an intercooler, a torsional damper, a fuel tank, and a controller. The gasoline engine is connected to the hybrid gearbox via the torsional damper, and the hybrid gearbox is connected to the stern engine via the flexible coupling. The stern engine is equipped with a propeller. The power battery is electrically connected to the hybrid gearbox and the PDU via a DC bus, and the PDU's output terminal is electrically connected to the hybrid gearbox. The fuel tank is connected to the gasoline engine via an oil pipe, and the power battery is connected to a radiator via a water pipe. The controller is connected to the gasoline engine, the hybrid gearbox, the PDU, and the power battery via signals, and can control the system to switch between multiple modes according to operating condition commands and energy status. The gasoline engine is installed in the hull via a front and aft buffer, and all components are integrated to form a modular power module unit. The torsional damper can buffer the power transmission vibration between the gasoline engine and the hybrid gearbox. The front and rear dampers further isolate the vibration transmission from the gasoline engine to the cabin, significantly reducing the overall vibration of the ship. The modular integrated design integrates the scattered components into a unified module, reducing the messy layout of pipelines and lines, reducing the difficulty of installation. At the same time, the standardized interface allows the module to be quickly adapted to different ships, solving the problems of scattered installation and poor adaptability of traditional systems.

[0005] A further technical solution is that the hybrid gearbox has a built-in generator, drive motor and clutch; the output shaft of the gasoline engine is connected to the hybrid gearbox, the hybrid gearbox can convert the mechanical energy of the gasoline engine into electrical energy and store it in the power battery, or drive the stern engine through the drive motor, and the hybrid gearbox obtains electrical energy from the power battery through the PDU to achieve pure electric drive; The integrated design of the hybrid gearbox realizes the dual functions of "mechanical energy to electrical energy conversion" and "power drive", eliminating the need for an additional independent generator and simplifying the system structure; the clutch can flexibly switch the transmission path of the gasoline engine power, providing core hardware support for multi-mode drive and improving the flexibility of system power output.

[0006] A further technical solution also includes a hybrid gearbox controller; the hybrid gearbox controller is connected to the controller via a cable, and can receive control signals from the controller to regulate the power generation status of the generator in the hybrid gearbox, the power output status of the drive motor, and the engagement / disengagement status of the clutch; The hybrid gearbox controller, as a dedicated control unit, can share the control pressure of the controller, improve the control accuracy of the internal components of the hybrid gearbox, avoid control delays caused by excessive load on the controller, ensure the smoothness of multi-mode switching, and improve the stability of ship handling.

[0007] A further technical solution includes a mode selection module, an energy management module, and a control execution module. The mode selection module receives user input commands for pure electric, pure gasoline, range-extended, and hybrid modes. The energy management module monitors the state of charge (SOC) of the power battery and the ship's instantaneous power demand in real time. The control execution module outputs control signals to the gasoline engine, the PDU, and the clutch in the hybrid gearbox based on the mode commands, SOC, and power demand. The modular design of the controller clarifies the "command reception - status monitoring - execution control" process, preventing the entire system from being paralyzed due to a single module failure and improving system reliability. The real-time monitoring function of the energy management module can dynamically capture changes in the ship's operating status, providing accurate data support for mode switching and avoiding energy waste or insufficient power.

[0008] A further technical solution is that the predetermined control strategy of the control execution module includes: when the SOC is higher than a first threshold and the power demand is lower than the lower limit of the fuel economy range of the gasoline engine, the pure electric drive mode is activated and the gasoline engine is turned off; when the SOC is lower than a second threshold and the power demand is higher than a set value, the hybrid drive mode is activated and the gasoline engine is started, which, together with the power battery, supplies power to the drive motor; when the SOC is lower than a third threshold and the power demand is lower than a set value, the charging mode is activated and the gasoline engine is started, driving the generator to charge the power battery and supply power to the ship; This control strategy can achieve "on-demand energy supply" based on energy status and power demand. The pure electric mode meets the environmental requirements of the zero-emission zone, the hybrid mode ensures high power demand, and the charging mode solves range anxiety. At the same time, it ensures that the gasoline engine always operates in the economic fuel consumption range as much as possible, reducing fuel consumption and taking into account environmental protection, power and economy.

[0009] A further technical solution is that the gasoline engine, the hybrid gearbox, the PDU, and the stern engine are integrated to form a compact power module unit; the external dimensions of the module unit can be adapted and adjusted according to the cabin space of different ships, and the connection interfaces of each component are standardized, which facilitates installation and maintenance; The compact modular design saves cabin space and is suitable for the limited installation area of ​​small vessels; the standardized interfaces eliminate the need to debug and connect each component individually during installation, shortening installation time; and maintenance can be carried out by quickly disassembling and repairing the entire module or parts of the module, reducing maintenance costs.

[0010] Further technical solutions also include a wet exhaust system; the input end of the wet exhaust system is connected to the exhaust port of the gasoline engine through an exhaust pipe, and the output end extends to the waters outside the ship, which can cool and reduce the noise of the exhaust gas discharged from the gasoline engine. The wet exhaust system can reduce the temperature of the gasoline engine exhaust gas, avoiding thermal damage to the cabin components caused by the high-temperature exhaust gas. At the same time, it can further reduce exhaust noise. Combined with the quietness of the pure electric mode, it can comprehensively improve the noise control effect of the ship and optimize the passenger experience.

[0011] Applying this hybrid power system to various small vessels can address the specific power challenges faced by different vessels, such as the comfort requirements of recreational boats, the quietness and range requirements of fishing boats, and the environmental protection and economic requirements of sightseeing boats. This expands the application scenarios of the system and enhances the market competitiveness of the vessel products.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention, based on the core transmission structure of "gasoline engine-torsional damper-hybrid gearbox", combined with the vibration isolation effect of the front and rear buffers, can significantly reduce the vibration transmission of the gasoline engine during operation; at the same time, in pure electric drive mode, the gasoline engine is completely shut off, completely eliminating exhaust odor and engine noise, significantly improving the comfort of the ship, and effectively solving the defects of traditional diesel / gasoline power with large noise and vibration and oil fumes. This invention, relying on the intelligent control strategy and multi-mode drive design of the controller, allows the system to flexibly switch operating modes according to actual scenarios: pure electric mode meets the environmental protection requirements of "zero emission zone"; range-extended mode solves the pure electric range anxiety through "gasoline engine power generation + pure electric drive"; hybrid mode provides maximum power output; and pure gasoline mode ensures basic navigation when the battery is low. At the same time, the gasoline engine prioritizes operation in the economic fuel consumption range to reduce fuel consumption, taking into account environmental protection, range, and economy, and solving the problem that existing power solutions cannot balance multiple needs. This invention adopts a modular integrated design of "gasoline engine-hybrid box-PDU-stern engine". The connection relationship of each component is fixed and the interface is standardized. During installation, there is no need to adjust the scattered components one by one, which shortens the installation time. During maintenance, faulty components within the module can be quickly located, improving maintenance efficiency. At the same time, the module size can be adapted to the cabin space of different vessels such as recreational boats and fishing boats, which has strong adaptability and solves the problems of low integration, difficult installation and maintenance, and poor adaptability of existing power systems.

[0013] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the wet exhaust system of the present invention; Figure 3 This is a schematic diagram of the torsional damper of the present invention.

[0015] In the diagram: 1. Controller; 2. Intercooler; 3. Gasoline engine; 4. Hybrid gearbox controller; 5. Torsional damper; 6. Hybrid gearbox; 7. Flexible coupling; 8. Stern engine; 9. Power battery; 10. Radiator; 11. Front shock absorber; 12. Rear shock absorber; 13. PDU; 14. Fuel tank; 15. Wet exhaust system; 16. Low-voltage battery; 17. DC bus. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0017] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0018] Example 1 like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment of the invention provides a modular hybrid power system for marine vessels capable of intelligent switching between multiple modes, including a gasoline engine 3, a hybrid gearbox 6 (with built-in generator, drive motor, and clutch), a flexible coupling 7, a stern engine 8 (including a propeller), a power battery 9, a PDU 13, a low-voltage battery 16, an intercooler 2, a torsional damper 5, a fuel tank 14, a controller 1, a hybrid gearbox controller 4, and a wet exhaust system 15. The gasoline engine 3 is connected to the hybrid gearbox 6 via the torsional damper 5, the hybrid gearbox 6 is connected to the stern engine 8 via the flexible coupling 7, the power battery 9 is electrically connected to the hybrid gearbox 6 and the PDU 13 via a DC bus 17, the fuel tank 14 is connected to the gasoline engine 3 via an oil pipe, and the controller 1 is signal-connected to the gasoline engine 3, the hybrid gearbox 6, the PDU 13, and the power battery 9. The gasoline engine 3 is installed in the cabin via a front buffer 11 and a rear buffer 12. All components are integrated to form a modular power module unit, which is installed in the mid-level cabin of a small to medium-sized luxury yacht.

[0019] In this embodiment, when the system is in pure electric mode, the energy management module of controller 1 monitors in real time that the state of charge (SOC) of the power battery 9 is higher than the first threshold and the power demand of the ship is lower than the lower limit of the economic fuel consumption range of the gasoline engine 3. The control execution module of controller 1 outputs a signal: shuts down the gasoline engine 3 and cuts off the fuel supply from the fuel tank 14 to the gasoline engine 3; at the same time, it controls PDU 13 to conduct the circuit between the power battery 9 and the drive motor in the hybrid box 6, and the power battery 9 supplies power to the drive motor through the DC bus 17; after the drive motor starts, it drives the transmission structure in the hybrid box 6 to rotate, and then drives the stern engine 8 and propeller to rotate through the flexible coupling 7, so as to realize the pure electric navigation of the yacht; at this time, the clutch in the hybrid box 6 is in the disengaged state, the gasoline engine 3 is completely disconnected from the transmission structure, and the yacht has no engine noise or vibration and no exhaust odor when running, which meets the needs of leisure cruise in zero-emission areas such as ports and lakes.

[0020] In this embodiment, when the system is in hybrid mode, the controller 1 detects that the ship needs to sail at high speed (power demand is higher than the maximum output power of the gasoline engine 3), and the SOC of the power battery 9 is higher than the second threshold. The control execution module starts the gasoline engine 3, controls the fuel tank 14 to supply fuel to the gasoline engine 3, and the intercooler 2 starts simultaneously to cool the intake air of the gasoline engine 3 to improve combustion efficiency. At the same time, the clutch in the hybrid box 6 is engaged, and the power of the gasoline engine 3 is transmitted to the hybrid box 6 after being buffered by the torsional damper 5. The PDU13 connects the circuit of the power battery 9 and the drive motor, and the drive motor outputs power. The two meet in the hybrid box 6 and drive the stern engine 8 together through the flexible coupling 7, so that the yacht obtains maximum power output to meet the needs of high-speed sailing or strong water flow.

[0021] In this embodiment, when the system is in range-extended mode, if the controller 1 detects that the SOC of the power battery 9 is lower than the third threshold and the ship needs to navigate in the zero-emission zone (power demand is lower than the set value), the control execution module starts the gasoline engine 3 and controls it to operate in the economic fuel consumption range; the clutch in the hybrid box 6 disengages, and the gasoline engine 3 drives the generator in the hybrid box 6 to generate electricity; the electrical energy generated by the generator is transmitted to the PDU 13 through the DC bus 17, and the PDU 13 divides the electrical energy into two paths: one path supplies the drive motor to drive the stern engine 8 to ensure the yacht's pure electric navigation; the other path charges the power battery 9, and the charging current is dynamically adjusted by the PDU 13 according to the SOC of the power battery 9 to avoid overcharging; at the same time, the wet exhaust system 15 cools and reduces the noise of the exhaust gas discharged from the gasoline engine 3, preventing high-temperature exhaust gas from damaging the cabin components and reducing exhaust noise. With the modular design, more space can be reserved in the yacht cabin for luxury decoration, improving the overall quality of the yacht.

[0022] Example 2 differs from Example 1 in that: for small fishing boats (with limited cabin space), the modular power module unit integrating the gasoline engine 3, hybrid box 6, PDU13, and stern engine 8 is optimized in size to fit the limited cabin space of fishing boats; the power battery 9 uses a compact lithium battery pack, installed at the bottom of the cabin to save space; the control strategy of the controller 1 is optimized: in range-extending mode, the output power of the gasoline engine 3 is limited to the economic fuel consumption range, improving the charging efficiency of the generator in the hybrid box 6; at the same time, a rubber damping pad is added between the stern engine 8 and the flexible coupling 7 to further reduce vibration transmission.

[0023] This invention provides a marine modular hybrid power system with multi-mode intelligent switching. The gasoline engine 3 is connected to the hybrid box 6 through the torsional damper 5. The hybrid box 6 is connected to the stern engine 8 through the flexible coupling 7 and the rubber damping pad. The power battery 9 is installed at the bottom of the hull. After optimization, the controller 1 can improve the charging efficiency in the range-extending mode.

[0024] In this embodiment, when the angler casts the line in wild waters, the system switches to pure electric mode. Controller 1 shuts down the gasoline engine 3, and the drive motor in the hybrid gearbox 6 drives the stern engine 8 via a flexible coupling 7 and rubber damping pads. The rubber damping pads further reduce the minute vibrations transmitted from the drive motor to the stern engine 8, resulting in extremely low noise and vibration during fishing, preventing the fish from being startled and solving the problem of high noise and strong vibration in traditional gasoline fishing boats affecting fishing performance. When a long-distance relocation to the fishing spot is required and the power battery 9SOC is insufficient, the range extender mode is activated, and the gasoline engine 3 operates on economical fuel... The system operates within a limited range, resulting in low fuel consumption. Simultaneously, the generator within the hybrid gearbox 6 boasts improved charging efficiency, rapidly replenishing the power battery 9 and ensuring a switch back to pure electric mode upon reaching a new fishing spot. The compact design of the modular power module unit eliminates the need for significant modifications to the fishing boat's cabin. Installation simply requires fixing the module to its pre-set position and connecting pipes and wiring via standardized interfaces, shortening installation time. Maintenance is facilitated by directly inspecting internal components through the side access door of the module, eliminating the need to disassemble the entire module, thus enhancing maintenance convenience and reducing the operating and maintenance costs of the fishing boat.

[0025] Working principle and usage process of this invention: System initialization phase: After the ship starts, controller 1 automatically triggers the system self-test process: controller 1 sends detection signals to components such as gasoline engine 3, hybrid box 6, PDU13, and power battery 9 via cables, and receives status feedback from each component (such as whether the fuel line of gasoline engine 3 is unobstructed, whether the clutch in hybrid box 6 is normal, and whether power battery 9 has a fault); if all components report normal feedback, the energy management module of controller 1 starts, collects the state of charge (SOC) of power battery 9 in real time, and collects the navigation commands set by the user through the ship control system (such as "pure electric mode" and "intelligent mode"). If the user does not set commands, the system defaults to "intelligent mode"; low-voltage battery 16 supplies power to control system components such as controller 1 and hybrid box controller 4 to ensure normal control function; intercooler 2 and radiator 10 start pre-operation to prepare for the subsequent operation of power components; Mode determination and execution phase: Based on the three-dimensional data of "mode command + SOC + power demand", the control execution module of controller 1 executes the corresponding mode according to the predetermined control strategy. Pure electric drive mode: When the conditions of "user selects pure electric mode" or "SOC is higher than the first threshold and the instantaneous power demand is lower than the fuel consumption limit of gasoline engine 3" are met, the control execution module outputs the following signals: ① Gasoline engine 3 is turned off, and the fuel supply from fuel tank 14 to gasoline engine 3 is cut off; ② The PDU13 is controlled to connect the circuit between the power battery 9 and the drive motor in the hybrid box 6, and the power battery 9 supplies power to the drive motor through DC bus 17; ③ The drive motor starts, driving the transmission structure in the hybrid box 6 to rotate, and driving the stern engine 8 and propeller to rotate through the flexible coupling 7, realizing pure electric navigation; at this time, the clutch in the hybrid box 6 is in the disengaged state, and the gasoline engine 3 is disconnected from the transmission structure; Pure gasoline drive mode: When the conditions of "user selects pure gasoline mode" or "in intelligent mode, SOC is lower than the second threshold and the instantaneous power demand is equal to the output power of gasoline engine 3" are met, the control execution module outputs the following signals: ① Start gasoline engine 3, control fuel tank 14 to supply fuel to gasoline engine 3, and intercooler 2 to cool the intake air of gasoline engine 3; ② Control the clutch in the hybrid box 6 to engage, and the power of gasoline engine 3 is transmitted to hybrid box 6 through torsional damper 5, and then drives engine 8 through flexible coupling 7; ③ Control PDU13 to disconnect the circuit between power battery 9 and drive motor, drive motor does not work, all power of gasoline engine 3 is used for driving, and no charging is performed; wet exhaust system 15 is started to cool and reduce noise of exhaust gas from gasoline engine 3; Range-extended drive mode: When the conditions of "user selects range-extended mode" or "in intelligent mode, SOC is below the third threshold and the immediate power demand is below the set value and zero-emission navigation is required" are met, the control execution module outputs the following signals: ① Starts the gasoline engine 3 and controls it to operate in the economic fuel consumption range; ② Controls the clutch in the hybrid box 6 to disengage, and the gasoline engine 3 drives the generator in the hybrid box 6 to generate electricity; ③ The electrical energy generated by the generator is transmitted to the PDU13 through the DC bus 17. The PDU13 divides the electrical energy into two paths: one path supplies the drive motor to drive the stern engine 8 to achieve pure electric navigation; the other path charges the power battery 9, and the charging current is dynamically adjusted by the PDU13 according to the SOC of the power battery 9; at this time, the power of the drive motor comes entirely from the generator, and the power battery 9 only receives charging. Hybrid drive mode: When the conditions of "user selects hybrid mode" or "SOC is higher than the second threshold and instantaneous power demand is higher than the maximum output power of gasoline engine 3" are met, the control execution module outputs the following signals: ① Start gasoline engine 3, control the clutch to engage, and the power of gasoline engine 3 is transmitted to hybrid gearbox 6 through torsional damper 5; ② Control PDU13 to connect the circuit between power battery 9 and drive motor, power battery 9 supplies power to drive motor, and drive motor outputs power; ③ The power of gasoline engine 3 and the power of drive motor are combined in hybrid gearbox 6 and jointly drive stern engine 8 through flexible coupling 7 to achieve maximum power output; at this time, the total output power of the system = output power of gasoline engine 3 + output power of drive motor, which meets the needs of ship acceleration, strong water flow resistance and other scenarios; Dynamic Adjustment and Mode Switching Phase: During navigation, the energy management module updates the SOC of the power battery 9 and the ship's real-time power demand data in real time. The control execution module dynamically adjusts the mode according to the data changes: If in pure electric mode, "SOC is still higher than the first threshold but power demand is higher than the lower limit of economic fuel consumption", controller 1 automatically switches to hybrid mode, starts gasoline engine 3, and drives the ship together with the drive motor to avoid insufficient power; if in range-extended mode, "SOC is higher than the third threshold and power demand is lower than the set value", controller 1 automatically switches to pure electric mode, shuts down gasoline engine 3, and reduces fuel consumption; if in hybrid mode, "power demand is lower than the maximum output power of gasoline engine 3 and SOC is high", controller 1 automatically shuts down the drive motor and switches to pure gasoline mode, so that gasoline engine 3 operates in the economic fuel consumption range and avoids energy waste. System Stop and Charging Phase: After the ship docks, the user sends a "stop command" through the control system. Controller 1 performs the following operations: ① Controls the drive motor to stop working, cutting off the circuit between the power battery 9 and PDU 13; ② If the gasoline engine 3 is running, controls it to stop running, cutting off the fuel supply to the fuel tank 14; ③ Controls the clutch in the hybrid box 6 to disengage, avoiding rigid connection between components; ④ The energy management module detects the SOC of the power battery 9. If the SOC is lower than the first threshold, controller 1 prompts the user whether to enable "charging mode". If the user confirms, the gasoline engine 3 is started to drive the generator to charge the power battery 9 until the SOC reaches the first threshold and then automatically stops; ⑤ After all components stop working, controller 1 saves the operation data (such as the running time of each mode, fuel consumption, and SOC changes) for subsequent maintenance and analysis.

[0026] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular marine hybrid power system with multi-mode intelligent switching, comprising a gasoline engine (3), a hybrid gearbox (6), a flexible coupling (7), a stern engine (8), a power battery (9), a PDU (13), a low-voltage battery (16), an intercooler (2), a torsional damper (5), a fuel tank (14), and a controller (1), characterized in that: The gasoline engine (3) is connected to the hybrid box (6) through the torsional damper (5), and the hybrid box (6) is connected to the stern engine (8) through the flexible coupling (7). The stern engine (8) is equipped with a propeller. The power battery (9) is electrically connected to the hybrid box (6) and the PDU (13) through the DC bus (17). The output end of the PDU (13) is electrically connected to the hybrid box (6). The fuel tank (14) is connected to the gasoline engine (3) through the fuel pipe. The power battery (9) is connected to the radiator (10) through the water pipe. The controller (1) is connected to the gasoline engine (3), the hybrid box (6), the PDU (13), and the power battery (9) through the signal. It can switch between multiple modes according to the working condition command and energy status control system. The gasoline engine (3) is installed in the cabin through the front buffer (11) and the rear buffer (12). The components are integrated to form a modular power module unit.

2. The marine modular hybrid power system with multi-mode intelligent switching as described in claim 1, characterized in that: The hybrid box (6) has a built-in generator, drive motor and clutch; the output shaft of the gasoline engine (3) is connected to the hybrid box (6), the hybrid box (6) can convert the mechanical energy of the gasoline engine (3) into electrical energy and store it in the power battery (9), or drive the stern engine (8) through the drive motor, and the hybrid box (6) obtains the electrical energy of the power battery (9) through the PDU (13) to achieve pure electric drive.

3. The marine modular hybrid power system with multi-mode intelligent switching as described in claim 1, characterized in that: It also includes a hybrid box controller (4); the hybrid box controller (4) is connected to the controller (1) via a cable, and can receive the control signal from the controller (1) to regulate the power generation status of the generator in the hybrid box (6), the power output status of the drive motor and the engagement / disengagement status of the clutch.

4. The marine modular hybrid power system with multi-mode intelligent switching as described in claim 1, characterized in that: The controller (1) includes a mode selection module, an energy management module and a control execution module; the mode selection module is used to receive user input of pure electric, pure oil, range-extended, hybrid and other mode commands; the energy management module is used to monitor the state of charge (SOC) of the power battery (9) and the ship's instantaneous power demand in real time; the control execution module outputs control signals to the gasoline engine (3), the PDU (13) and the clutch in the hybrid box (6) based on the mode command, SOC and power demand.

5. The marine modular hybrid power system with multi-mode intelligent switching as described in claim 1, characterized in that: The predetermined control strategy of the control execution module includes: when the SOC is higher than the first threshold and the power demand is lower than the lower limit of the economic fuel consumption range of the gasoline engine (3), the pure electric drive mode is activated and the gasoline engine (3) is turned off; when the SOC is lower than the second threshold and the power demand is higher than the set value, the hybrid drive mode is activated and the gasoline engine (3) is started, which together with the power battery (9) supplies power to the drive motor; when the SOC is lower than the third threshold and the power demand is lower than the set value, the charging mode is activated and the gasoline engine (3) is started, which drives the generator to charge the power battery (9) and supply power to the ship.

6. The marine modular hybrid power system with multi-mode intelligent switching according to claim 1, characterized in that: The gasoline engine (3), the hybrid box (6), the PDU (13) and the stern engine (8) are integrated to form a compact power module unit; the external dimensions of the module unit can be adapted and adjusted according to the cabin space of different ships, and the connection interfaces of each component are standardized, which facilitates installation and maintenance.

7. The marine modular hybrid power system with multi-mode intelligent switching according to claim 1, characterized in that: It also includes a wet exhaust system (15); the input end of the wet exhaust system (15) is connected to the exhaust port of the gasoline engine (3) through an exhaust pipe, and the output end extends to the waters outside the ship, which can cool and reduce the noise of the exhaust gas discharged by the gasoline engine (3).

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