A range-extended hybrid motorboat system and control method

Abstract

This invention discloses a range-extended hybrid motorboat system and control method, belonging to the field of new energy engineering technology. The system includes: a human-machine interface unit for receiving operation commands and displaying system status; a system control unit for receiving user commands and feedback information and issuing control commands to corresponding units; a high- and low-voltage unit for storing, converting, and distributing electrical energy; and a power integration unit for providing fuel power for the range-extended mode, including an engine, engine controller, electronically controlled ISG motor, electronically controlled drive motor, cooling device, fuel tank, and liquid level sensor. This invention adopts a range-extended hybrid mode that uses fuel to generate electricity and the motor for drive. When the battery is low, it continuously charges the battery or directly powers the electronically controlled drive motor. Energy can be quickly replenished by refueling, effectively solving the problems of short range and inconvenient charging of pure electric motorboats. It combines the advantages of low noise and zero emissions of pure electric drive with the long range of fuel power.

Description

Technical Field

[0001] This invention relates to the field of new energy engineering technology, specifically a range-extended hybrid motorboat system and control method. Background Technology

[0002] Inland rivers or lakes generally use gasoline-powered motorboats for water recreation projects. These gasoline-powered motorboats are expensive to use, and the exhaust fumes can easily cause water acidification when they come into contact with fresh water, which is detrimental to water resources and environmental protection. In addition, the engine noise will cause noise pollution.

[0003] As the automotive and motorcycle industries gradually shift towards new energy vehicles and motorcycles represented by electrification, electric motorboats have advantages over gasoline-powered motorcycles in terms of energy saving, emission reduction, low noise, and low vibration. Compared with gasoline-powered motorboats, electric motorboats avoid environmental pollution caused by exhaust emissions, engine noise, and fuel costs. However, due to limited space, electric motorboats have smaller battery capacities, resulting in a shorter driving range.

[0004] Due to current technological barriers in power batteries, insufficient range is the biggest problem for pure electric vehicles and motorboats. To solve the range problem of electric motorcycles, range-extended electric vehicles and motorboats have become a key research direction before breakthroughs in battery technology. These vehicles can use other energy sources (gasoline) to replenish power when battery energy is insufficient or depleted. However, range-extended electric motorboats are currently in their infancy. Therefore, it is necessary to design a complete control system for range-extended electric motorboats to improve their reliability, safety, and range.

[0005] Based on this, a range-extended hybrid motorboat system and control method are provided, which can eliminate the drawbacks of existing technical solutions. Summary of the Invention

[0006] The purpose of this invention is to provide a range-extended hybrid motorboat system and control method to solve the problems of short range and inconvenient charging of electric motorcycles in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A range-extended hybrid motorboat system, comprising:

[0009] The human-computer interaction unit is used to receive user operation commands and display system status and operation. The human-computer interaction unit includes several function buttons and a human-computer interaction touch screen.

[0010] The system control unit, including the system controller, is used to receive user commands from the human-machine interaction unit and status information fed back by each unit, and after analyzing the status information, to issue control commands to the corresponding unit.

[0011] The high and low voltage unit is responsible for the storage, conversion and distribution of electrical energy. The high and low voltage unit includes a high voltage battery pack, a storage battery, a PDU high voltage distribution box and a step-down DC-DC converter.

[0012] The power integration unit is used to provide fuel power for the range-extending mode. The power integration unit includes an engine, an engine controller, an electronically controlled ISG motor, an electronically controlled drive motor, a cooling device, a fuel tank, and a liquid level sensor. The liquid level sensor is located inside the fuel tank. The engine and the electronically controlled ISG motor are integrated to form a range extender.

[0013] The engine controller is electrically connected to the engine and is used to control the normal operation of the engine. The drive shaft of the electronically controlled ISG motor is connected to the flywheel of the engine via a spline to realize the start and stop of the engine and assist its rotation and power generation. The PDU high-voltage distribution box is integrated with the high-voltage components and is connected to the electronically controlled ISG motor and the high-voltage battery pack respectively through the DC high-voltage connector bundles interconnected at both ends of the PDU high-voltage distribution box, and is used to control the energy of the electronically controlled ISG motor and the high-voltage battery pack to drive the load output power.

[0014] The system controller communicates with the electronically controlled ISG motor, the electronically controlled drive motor, the engine controller, the high-voltage battery pack, and the human-machine interface touch screen via a CAN bus. The system controller is also connected to the function buttons and the liquid level sensor via hardwired I / O ports.

[0015] Preferably, the function buttons include a wake-up KL15 button, a high-voltage button, and a start button. The wake-up KL15 button is used to wake up the system controller and automatically detect the low voltage. The high-voltage button is used to request the range-extended hybrid motorboat system to automatically detect the high voltage after the low voltage is successfully applied. The start button is used to request the range extender to start after the range-extended hybrid motorboat system has applied the high voltage and to generate electricity at idle speed with low power to meet the power demand of the stationary load.

[0016] Preferably, the high-voltage battery pack has a built-in heating film and uses direct cooling with air conditioning refrigerant. When the temperature of the high-voltage battery pack is detected to be low, the heating film is turned on to heat the high-voltage battery pack. When the temperature of the high-voltage battery pack is detected to be high, the air conditioning refrigerant is used to dissipate heat from the high-voltage battery pack.

[0017] Preferably, the cooling device includes an integrated water-cooled radiator, water pipes and a water pump. The integrated water-cooled radiator is used to exchange heat between the engine coolant and the water flow under the motorboat, and works with the mechanical water pump on the engine (41) to cool the engine (41) itself. The water pump is used to deliver the water flow under the boat to the side of the electronically controlled ISG motor (43) and the electronically controlled drive motor (44) for cooling, so as to ensure the normal operating temperature of the range extender when generating power.

[0018] Preferably, the human-computer interaction touchscreen includes:

[0019] The system parameter module is used to display the dynamic parameter values ​​and component status of the range-extended hybrid motorboat system in real time;

[0020] The user settings module is used to adapt to the usage and configuration needs of different customers;

[0021] The fault handling module is used to quickly identify faults and issue alarms, while recording fault data and fault codes.

[0022] The factory commissioning module is used to perform work tasks directly through the visual interface of the human-machine interaction touch screen during the factory commissioning and off-line configuration of the range-extended electric motorboat system.

[0023] Preferably, the motorboat is equipped with a jet propulsion device. The system controller controls the range-extended hybrid motorboat system to provide power to the jet propulsion device of the motorboat based on the functional requirements of the throttle pedal. The system controller is electrically connected to the throttle pedal and is used to receive the user's acceleration command.

[0024] A control method for a range-extended hybrid motorboat system specifically includes the following steps:

[0025] Step S1: Press the wake-up KL15 button to request low voltage and obtain the working parameters of the range-extended hybrid motorboat system after wake-up;

[0026] Step S2: The range-extended hybrid motorboat system monitors the battery voltage, as well as the fault status of the range-extended hybrid motorboat system components and the CAN communication status.

[0027] Step S3: When it is determined that the battery voltage is normal, the range-extended hybrid motorboat system is working normally and there are no faults in the system components, the range-extended hybrid motorboat system enters a low-voltage state and presses the high-voltage button to request high voltage.

[0028] Step S4: The range-extended hybrid motorboat system monitors the high-voltage interlock, the fault status and condition of system components, and the bus voltage of each high-voltage component during the pre-charging of the high-voltage battery pack.

[0029] Step S5: When it is determined that the high voltage state of the range-extended hybrid motorboat system is normal and the high voltage is normally connected, the range-extended hybrid motorboat system enters the high voltage state and makes the corresponding high voltage components work, and presses the start button to request the range extender to start.

[0030] Step S6: The range-extended hybrid motorboat system monitors the fuel tank level, the fault status and condition of system components, and the lifting and ignition status of the electronically controlled ISG motor.

[0031] Step S7: When it is determined that the range extender of the range-extended hybrid motorboat system is in normal condition and has started normally, the range-extended hybrid motorboat system enters the series power generation state, presses the throttle pedal, and requests the speed control of the electric drive motor according to the throttle pedal opening and responds to the corresponding speed request.

[0032] Preferably, step S3 further includes:

[0033] If it is not confirmed that the battery voltage is normal, the range-extended hybrid motorboat system is working normally, and the system components are fault-free, the range-extended hybrid motorboat system will indicate overvoltage, undervoltage, or system component failure.

[0034] Preferably, step S5 further includes:

[0035] If it is not confirmed that the high voltage status of the range-extended hybrid motorboat system is normal and that it is operating normally at high voltage, the range-extended hybrid motorboat system will indicate a high voltage component status detection error, pre-charge detection failure, or a high voltage prohibition fault status for the range-extended hybrid motorboat system.

[0036] Preferably, step S7 further includes:

[0037] If it is not confirmed that the range extender of the range-extended hybrid motorboat system is in normal condition and has started normally, the range-extended hybrid motorboat system will indicate a start-up failure or a start-prohibited fault status.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] This invention employs a range-extended hybrid mode that combines fuel-powered electricity generation and electric motor drive. When the battery is low, it continuously charges the high-voltage battery pack or directly powers the electronically controlled drive motor. Energy can be quickly replenished by refueling, effectively solving the problems of short range and inconvenient charging for pure electric motorboats. It combines the advantages of low noise and zero emissions from pure electric drive with the long range of fuel-powered motorboats. It also features thermal management, multi-level safety detection, and convenient human-machine interaction, making it suitable for various water recreation and work scenarios. It has good market application prospects and saves charging time and battery pack costs compared to pure electric energy systems. It meets the short-term high-power electricity demand of motorboat equipment. At the same time, by acquiring the DC high-voltage bus voltage and current of the high-voltage battery pack or the real-time power demand of the load, it can realize the function of the high-voltage battery pack and range extender working together to supply power, reducing response time. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the range-extended hybrid motorboat system of the present invention.

[0041] Figure 2 This is a schematic diagram of the structure of each unit of the range-extended hybrid motorboat system of the present invention.

[0042] Figure 3 This is a schematic diagram of the human-machine interface touchscreen of the range-extended hybrid motorboat system of the present invention.

[0043] Figure 4 This is a communication diagram of the range-extended hybrid motorboat system of the present invention.

[0044] Figure 5 This is a schematic diagram illustrating the interaction between the various units of the range-extended hybrid motorboat system of the present invention.

[0045] Figure 6 This is a schematic diagram of the steps of the control method of the present invention.

[0046] Figure reference numerals: Human-machine interaction unit 10, function button 11, human-machine interaction touch screen 12, system parameter module 121, user setting module 122, fault handling module 123, factory debugging module 124, system control unit 20, system controller 21, high and low voltage unit 30, high voltage battery pack 31, storage battery 32, PDU high voltage distribution box 33, step-down DC-DC converter 34, power integration unit 40, engine 41, engine controller 42, electronically controlled ISG motor 43, electronically controlled drive motor 44, cooling device 45, fuel tank 46, liquid level sensor 47. Detailed Implementation

[0047] 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.

[0048] Example 1

[0049] In this embodiment, as Figures 1-5 As shown, a range-extended hybrid jet ski system includes a jet ski equipped with a power-output injection drive device. A system controller 21, electrically connected to the throttle pedal, receives acceleration commands from the user and controls the range-extended hybrid jet ski system to power the jet ski's injection drive device. Through the injection drive device, a large amount of water from the bottom of the jet ski is propelled by an impeller and sprayed through a steering guide pipe, providing forward propulsion to the jet ski and meeting the driver's power requirements. Range-extended hybrid technology is a power mode that uses fuel to generate electricity and an electric motor for drive, unlike traditional direct-drive fuel systems and pure electric systems. In this system, the engine 41 does not directly drive the jet ski; it only charges the high-voltage battery pack 31 or directly powers the electronically controlled drive motor 44. This system combines the low noise and zero-emission advantages of pure electric power with the long range of fuel-powered vehicles. (The system includes...)

[0050] Human-computer interaction unit 10 is used to receive user operation commands and display system status and operation status. Human-computer interaction unit 10 includes several function buttons 11 and human-computer interaction touch screen 12.

[0051] The system control unit 20 includes a system controller 21, which can be abbreviated as VCU. It is used to receive user commands from the human-machine interaction unit 10 and status information fed back by each unit, and after analyzing the status information, it sends control commands to the corresponding unit.

[0052] The high-low voltage unit 30 is responsible for the storage, conversion and distribution of electrical energy. The high-low voltage unit 30 includes a high-voltage battery pack 31, a storage battery 32, a PDU high-voltage distribution box 33 and a step-down DC-DC converter 34. The high-voltage battery pack 31 has a built-in high-voltage battery pack management system (BMS) and temperature sensor. The high-voltage battery pack 31 uses a 2kW power type high-voltage battery pack, which has the characteristics of small size, light weight and high charging and discharging rate. The dynamic response and load requirements of the system can be met by short-term high-power charging and discharging of the high-voltage battery pack 31. The storage battery 32 provides stable low-voltage power to the low-voltage equipment (such as some sensors and control devices) of the range-extended hybrid motorboat system. The PDU high-voltage distribution box 33 is used to distribute high-voltage power and determine the direction of high-voltage current. The step-down DC-DC converter 34 is a step-down DC-DC converter used to convert high-voltage power into low-voltage power to power low-voltage components such as the storage battery 32.

[0053] The power integration unit 40 is used to provide fuel power for the range-extending mode. The power integration unit 40 includes an engine 41, an engine controller 42, an electronically controlled ISG motor 43, an electronically controlled drive motor 44, a cooling device 45, a fuel tank 46, and a liquid level sensor 47. The engine controller 42 can be abbreviated as ECM. The electronically controlled ISG motor 43 can drive the engine 41 to run when it starts or generate electricity when it is running. The electronically controlled ISG motor 43 is both a motor and an electronic controller, replacing the starter motor that is traditionally built into the engine. The electronically controlled drive motor 44 can directly provide driving force for the motorboat. The liquid level sensor 47 is located inside the fuel tank 46 to monitor fuel quantity information so that fuel can be added on-site in a timely manner to prevent the range extender from shutting down due to low fuel due to fuel depletion. The engine 41 and the electronically controlled ISG motor 43 are integrated to form the range extender.

[0054] The engine controller 42 is electrically connected to the engine 41 and is used to control the normal operation of the engine 41. The drive shaft of the electronically controlled ISG motor 43 is connected to the flywheel of the engine 41 via a spline to realize the start and stop of the engine 41 and assist its rotation and power generation. The PDU high-voltage distribution box 33 is integrated with the high-voltage components and is connected to the electronically controlled ISG motor 43 and the high-voltage battery pack 31 respectively through the DC high-voltage connector bundles interconnected at both ends of the PDU high-voltage distribution box 33. This is used to control the energy of the electronically controlled ISG motor 43 and the high-voltage battery pack 31 to drive the load output power.

[0055] The system controller 21 communicates with the electric ISG motor 43, the electric drive motor 44, the engine controller 42, the high-voltage battery pack 31, and the human-machine interface touch screen 12 via the CAN bus. The system controller 21 is also connected to the function button 11 and the liquid level sensor 47 via hard wires on the IO port.

[0056] Specifically, such as Figure 4As shown, each component interacts with the system controller 21 via a CAN bus to achieve coordinated control between the range-extended hybrid motorboat systems. The human-machine interface touchscreen 12 displays system status such as battery level and power mode, and can receive user commands. The high-voltage battery pack 31 has a built-in high-voltage battery pack management system (BMS) to monitor the status of the high-voltage battery pack 31, such as voltage, current, temperature, and SOC (State of Charge), and transmits the data to the system controller 21 to ensure battery safety and efficient utilization. The electronically controlled ISG motor 43 has dual functions of "starting the engine" and "generating electricity." During startup, the system controller 21 commands the engine 41 to run. After the engine 41 is running, the electronically controlled ISG motor 43 can be driven by the engine 41 to generate electricity, replenishing the high-voltage battery pack 31 or directly powering the electronically controlled drive motor 44. The engine controller 42 (ECM) controls the operation of the engine 41, such as speed, ignition, and fuel injection, and can receive commands from the system controller 21 to adjust the operating status of the engine 41. The air conditioning compressor controller (AC_C) is... Figure 5 The control device for the air conditioning compressor is used to control the operation of the air conditioning compressor, regulate the internal temperature of the motorboat, and receive start / stop and power commands from the system controller 21. The electric drive motor controller (MCU) is used to control the operation of the electric drive motor 44 and convert the power demand of the system controller 21 into drive commands for the electric drive motor 44.

[0057] Specifically, such as Figure 4 As shown, the CAN bus includes: 500K P-CAN (power CAN bus) and 500K RE-CAN (engine CAN bus). The 500K P-CAN (power CAN bus) is used to connect the human-machine interface touch screen 12, the electric drive motor 44, the high-voltage battery pack 31 and the system controller 21. It can transmit data information such as battery status, air conditioning requirements and motor commands. The 500K RE-CAN (engine CAN bus) is used to connect the system controller 21, the engine controller 42 (ECM) and the electric ISG motor 43. It is used to transmit the control commands of the engine 41 and the working status of the electric ISG motor 43.

[0058] Among them, such as Figure 5 As shown, the function button 11 includes a wake-up KL15 button, a high voltage button, and a start button. The wake-up KL15 button is used to wake up the system controller 21 and automatically detect the low voltage. The high voltage button is used to request the range-extended hybrid motorboat system to automatically detect the high voltage after the low voltage is successfully applied. The start button is used to request the range extender to start after the range-extended hybrid motorboat system is connected to the high voltage and to generate electricity at idle speed with low power to meet the power demand of the local load.

[0059] Furthermore, the high-voltage battery pack 31 incorporates a built-in heating film and employs a direct cooling method using air conditioning refrigerant. The high-voltage battery pack 31 integrates refrigerant channels for efficient heat exchange with the battery cells. This direct cooling, also known as direct refrigerant cooling, works by allowing the refrigerant from the air conditioning system to flow directly through the evaporator or cooling plate inside the high-voltage battery pack 31, exchanging heat directly with the battery cells or through a heat-conducting medium, thereby removing heat. When the temperature of the high-voltage battery pack 31 is detected to be low, the heating film is activated to heat the high-voltage battery pack 31. The heating film is a positive temperature coefficient heater; it generates heat when energized, providing high-temperature heating. The high-voltage battery pack 31 is heated to prevent the battery capacity from decreasing and the charging and discharging efficiency from decreasing due to low temperature. When the high-voltage battery pack 31 returns to the normal range, the heating film stops working. When the temperature of the high-voltage battery pack 31 is detected to be high, the high-voltage battery pack 31 is cooled by air conditioning refrigerant. The system will start the air conditioning compressor. The refrigerant will evaporate and absorb heat during the circulation process. The low-temperature refrigerant flows directly through the evaporator pipe embedded in the high-voltage battery pack 31. The heat is generated through the contact between the battery cell and the shell and cooling plate, and is finally transferred to the internal refrigerant pipe. It is quickly carried away by the flowing refrigerant to achieve the heat dissipation effect, which is the existing technology.

[0060] Among them, such as Figure 5 As shown, the cooling device 45 includes an integrated water-cooled radiator, water pipes, and a water pump (integrated into the spray pump assembly, using the spray pump propulsion method to guide water flow from the bottom of the boat into the boat for heat dissipation). The integrated water-cooled heat exchanger simultaneously dissipates heat from the engine 41, the electronically controlled ISG motor 43, and the high-voltage battery pack 31, ensuring that the engine 41, motor, and other components operate within a reasonable temperature range. The integrated water-cooled radiator is used to exchange heat between the engine coolant and the water flow from the bottom of the motorboat. The cooled coolant, together with the mechanical water pump on the engine 41, dissipates heat from the engine 41 itself. The water pump is used to deliver water flow from the bottom of the boat to the side of the electronically controlled ISG motor 43 and the electronically controlled drive motor 44 for heat dissipation, ensuring the normal operating temperature of the range extender when generating power.

[0061] Among them, such as Figure 3 As shown, the human-computer interaction touchscreen 12 includes:

[0062] System parameter module 121 is used to display the dynamic parameter values ​​and component status of the range-extended hybrid motorboat system in real time;

[0063] User settings module 122 is used to adapt to the usage configuration needs of different customers;

[0064] The fault handling module 123 is used to quickly identify faults and issue alarms, while recording fault data and fault codes.

[0065] The factory debugging module 124 is used to perform work tasks directly through the visual interface of the human-machine interaction touch screen 12 during the factory debugging and off-line configuration of the range-extended electric motorboat system.

[0066] Specifically, such as Figure 5 As shown in the diagram, the blue line represents the antifreeze line, the red line represents the high-voltage power supply line, the magenta line represents the low-voltage power supply line, the dashed line represents the control circuit, and the yellow line represents the fuel line. According to... Figure 5 It can be seen that the four units in this invention cooperate with each other, so that the range-extended hybrid motorboat can achieve low energy consumption and low emission driving in pure electric mode, and can also break through the pure electric range limit in range-extended mode with the help of engine 41 and electronically controlled ISG motor 43. Through the regulation of system control unit 20 and the convenient operation of human-machine interaction unit 10, the system can be guaranteed to operate efficiently, safely and humanely.

[0067] Specifically, the system includes two operating modes: Pure Electric Mode: The system controller 21 controls the PDU high-voltage power distribution box 33, and the high-voltage battery pack 31 supplies power to the electric drive motor 44 to drive the motorboat. This mode is suitable for areas with sufficient battery power, short-term low-speed and smooth driving, and areas with requirements for noise and emissions. Range Extender Mode: The system controller 21 uses the range extender to generate electricity. The generated electricity and the electricity output from the high-voltage battery pack 31 are coordinated through the PDU high-voltage power distribution box 33. The electricity is given priority to be used directly to power the electric drive motor 44, and the excess is used to charge the high-voltage battery pack 31. This mode is suitable for scenarios with low battery power and the need for long-term high-power operation. The system controller 21 will switch between pure electric mode and range extender mode according to information such as battery power, throttle pedal opening, and driving mode selection for easy operation.

[0068] Example 2

[0069] Among them, such as Figure 6 As shown, a control method for a range-extended hybrid motorboat system specifically includes the following steps:

[0070] Step S1: Press the wake-up KL15 button to request low voltage and obtain the working parameters of the range-extended hybrid motorboat system after wake-up;

[0071] Step S2: The range-extended hybrid motorboat system monitors the voltage value of the battery 32, as well as the fault status of the components of the range-extended hybrid motorboat system and the CAN communication status.

[0072] Step S3: When it is confirmed that the battery 32 voltage is normal, the range-extended hybrid motorboat system is working normally and there are no faults in the system components, the range-extended hybrid motorboat system enters the low-voltage state and presses the high-voltage button to request high voltage.

[0073] Furthermore, if it is not confirmed that the battery 32 voltage is normal, the range-extended hybrid motorboat system is working normally and there are no faults in the system components, the range-extended hybrid motorboat system will indicate overvoltage, undervoltage or system component failure status.

[0074] Specifically, steps S1 to S3 are the low-voltage wake-up stage. The wake-up KL15 button is a button on the side of the human-machine interaction touch screen 12. When the user presses the wake-up KL15 button, the system controller 21 is powered on and woken up. At the same time, a low-voltage self-test operation is triggered, which can detect the voltage value of the battery 32, the CAN bus communication status, the status of the function button 11, etc. If the voltage value of the battery 32 is within the normal range, there is no communication fault on the CAN bus, and the function button 11 is not stuck, the human-machine interaction touch screen 12 will display "low-voltage standby".

[0075] Step S4: The range-extended hybrid motorboat system monitors the high-voltage interlock, the fault status and condition of system components, and the bus voltage of each high-voltage component during the pre-charging of the high-voltage battery pack 31.

[0076] Specifically, the high-voltage interlock is a safety protection mechanism. By setting an interlock circuit in the connection line of the high-voltage component, the connection status of the high-voltage harness and connector is monitored in real time. If the high-voltage connector is loose or the harness is damaged, the interlock circuit is disconnected, and the system controller 21 immediately triggers the high-voltage power-off protection to prevent the user from being electrocuted or the component from being damaged.

[0077] Step S5: When it is confirmed that the high voltage status of the range-extended hybrid motorboat system is normal and the high voltage is being connected normally, the range-extended hybrid motorboat system enters the high voltage state and makes the corresponding high voltage components work. Press the start button to request the range extender to start.

[0078] Furthermore, if it is not confirmed that the high voltage status of the range-extended hybrid motorboat system is normal and that it is normally connected to the high voltage, the range-extended hybrid motorboat system will indicate a high voltage component status detection error, pre-charge detection failure, or a high voltage prohibition fault status for the range-extended hybrid motorboat system.

[0079] Specifically, steps S4 to S5 are the high-voltage power-on stage. The high-voltage button is a button on one side of the human-machine interaction touch screen 12. When the user presses the high-voltage button, the system controller 21 triggers the high-voltage self-test operation, which can detect the high-voltage interlock, battery voltage, pre-charge circuit, etc. If the high-voltage interlock circuit is closed without loosening, the voltage is within the rated range, and the pre-charge circuit is normal, the system controller 21 controls the PDU high-voltage distribution box 33, and the human-machine interaction touch screen 12 displays "high-voltage discharge".

[0080] Step S6: The range-extended hybrid motorboat system monitors the internal liquid level of the fuel tank 46, the fault status and condition of system components, and the lifting status of the electronically controlled ISG motor 43 and the ignition status of the engine 41.

[0081] Step S7: When it is determined that the range extender of the range-extended hybrid motorboat system is in normal condition and starts normally, the range-extended hybrid motorboat system enters the series power generation state, presses the throttle pedal, and requests the speed control of the electric drive motor 44 according to the throttle pedal opening and responds to the corresponding speed request.

[0082] Furthermore, if it is not confirmed that the range extender of the range-extended hybrid motorboat system is in normal condition and starts normally, the range-extended hybrid motorboat system will display a start failure or start-prohibited fault status.

[0083] Specifically, steps S6-S7 are the range extender start-up stage. The start button is a button on the side of the human-machine interface touch screen 12. When the user presses the start button, the system controller 21 sends a start command to the engine controller 42. At the same time, it controls the electronically controlled ISG motor 43 to drive the flywheel of the engine 41 to rotate, so that the engine 41 is successfully ignited. The electronically controlled ISG motor 43 switches to power generation mode. The system can detect the fuel level, engine 41 water temperature, and motor temperature. If the above parameters are all within the normal range, the human-machine interface touch screen 12 displays "Range Extender Power Generation". The series power generation state refers to the working mode in which the engine 41 drives the electronically controlled ISG motor 43 to generate electricity after the range extender is started. The generated electrical energy is directly or distributed through the PDU high-voltage distribution box 33 to drive the electronically controlled drive motor 44. It can also charge the high-voltage battery pack 31.

[0084] Specifically, the control method has a multi-level safety detection mechanism from low-voltage wake-up, high-voltage power-on to range extender startup, including voltage monitoring, high-voltage interlock, fault diagnosis, pre-charge detection, etc. If the conditions are not met, the range-extended hybrid motorboat system will report an error and prohibit operation, effectively preventing misoperation.

[0085] In summary, this invention adopts a range-extended hybrid solution that uses fuel-powered electricity generation and electric motor drive. When the high-voltage battery pack 31 is low on power, the range extender can continuously charge the battery or directly power the electronically controlled drive motor 44. Users can quickly replenish energy by refueling, fundamentally solving the problems of short range and inconvenient charging of pure electric motorboats. This system has the advantages of zero emissions and low vibration of pure electric drive, as well as the advantages of long range and rapid energy replenishment of fuel power. It is suitable for areas with short-term high environmental protection and quiet operation requirements, as well as application scenarios that require long-term, high-power operation.

[0086] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A range-extended hybrid motorboat system, characterized in that, include: The system control unit, including the system controller, is used to receive user commands from the human-machine interaction unit and status information fed back by each unit, and after analyzing the status information, to issue control commands to the corresponding unit. The high and low voltage unit is responsible for the storage, conversion and distribution of electrical energy. The high and low voltage unit includes a high voltage battery pack, a storage battery, a PDU high voltage distribution box and a step-down DC-DC converter. The power integration unit is used to provide fuel power for the range-extending mode. The power integration unit includes an engine, an engine controller, an electronically controlled ISG motor, an electronically controlled drive motor, a cooling device, a fuel tank, and a liquid level sensor. The liquid level sensor is located inside the fuel tank. The engine and the electronically controlled ISG motor are integrated to form a range extender. The cooling device includes an integrated water-cooled radiator, water pipes, and a water pump. The integrated water-cooled radiator is used to exchange heat between the engine coolant and the water flow under the motorboat, and works with the mechanical water pump on the engine to cool the engine itself. The water pump is used to deliver the water flow under the boat to the side of the electronically controlled ISG motor and the electronically controlled drive motor for cooling, ensuring the normal operating temperature of the range extender when generating power at high power. The human-machine interface unit is used to receive user operation commands and display system status and operation. The human-machine interface unit includes several function buttons and a human-machine interface touch screen. The function buttons include a wake-up KL15 button, a high voltage button, and a start button. The wake-up KL15 button is used to wake up the system controller and automatically detect the low voltage. The high voltage button is used to request the range-extended hybrid motorboat system to automatically detect the high voltage after the low voltage is successfully applied. The start button is used to request the range extender to start after the range-extended hybrid motorboat system has applied the high voltage and to generate electricity at idle speed with low power to meet the power demand of the stationary load. The engine controller is electrically connected to the engine and is used to control the normal operation of the engine. The drive shaft of the electronically controlled ISG motor is connected to the flywheel of the engine via a spline to realize the start and stop of the engine and assist its rotation and power generation. The PDU high-voltage distribution box is integrated with the high-voltage components and is connected to the electronically controlled ISG motor and the high-voltage battery pack respectively through the DC high-voltage connector bundles interconnected at both ends of the PDU high-voltage distribution box, and is used to control the energy of the electronically controlled ISG motor and the high-voltage battery pack to drive the load output power. The system controller communicates with the electric ISG motor, electric drive motor, engine controller, high-voltage battery pack, and human-machine interface touch screen via CAN bus. The system controller is also connected to function buttons and liquid level sensor via I / O port hardwire. The human-computer interaction touch screen includes: The system parameter module is used to display the dynamic parameter values ​​and component status of the range-extended hybrid motorboat system in real time; The user settings module is used to adapt to the usage and configuration needs of different customers; The fault handling module is used to quickly identify faults and issue alarms, while recording fault data and fault codes. The factory commissioning module is used to perform work tasks directly through the visual interface of the human-machine interaction touch screen during the factory commissioning and off-line configuration of the range-extended hybrid motorboat system.

2. The range-extended hybrid motorboat system according to claim 1, characterized in that, The high-voltage battery pack has a built-in heating film and uses direct cooling with air conditioning refrigerant. When the temperature of the high-voltage battery pack is detected to be low, the heating film is turned on to heat the high-voltage battery pack. When the temperature of the high-voltage battery pack is detected to be high, the air conditioning refrigerant is used to dissipate heat from the high-voltage battery pack.

3. The range-extended hybrid motorboat system according to claim 1, characterized in that, The motorboat is equipped with a jet propulsion device. The system controller controls the range-extended hybrid motorboat system to provide power to the jet propulsion device based on the functional requirements of the throttle pedal. The system controller is electrically connected to the throttle pedal and is used to receive the user's acceleration command.

4. A control method for a range-extended hybrid motorboat system according to any one of claims 1-3, characterized in that, Specifically, the following steps are included: Step S1: Press the wake-up KL15 button to request low voltage and obtain the working parameters of the range-extended hybrid motorboat system after wake-up; Step S2: The range-extended hybrid motorboat system monitors the battery voltage, as well as the fault status of the range-extended hybrid motorboat system components and the CAN communication status. Step S3: When it is determined that the battery voltage is normal, the range-extended hybrid motorboat system is working normally and there are no faults in the system components, the range-extended hybrid motorboat system enters a low-voltage state and presses the high-voltage button to request high voltage. Step S4: The range-extended hybrid motorboat system monitors the high-voltage interlock, the fault status and condition of system components, and the bus voltage of each high-voltage component during the pre-charging of the high-voltage battery pack. Step S5: When it is determined that the high voltage state of the range-extended hybrid motorboat system is normal and the high voltage is normally connected, the range-extended hybrid motorboat system enters the high voltage state and makes the corresponding high voltage components work, and presses the start button to request the range extender to start. Step S6: The range-extended hybrid motorboat system monitors the fuel tank level, the fault status and condition of system components, and the lifting and ignition status of the electronically controlled ISG motor. Step S7: When it is determined that the range extender of the range-extended hybrid motorboat system is in normal condition and has started normally, the range-extended hybrid motorboat system enters the series power generation state, presses the throttle pedal, and requests the speed control of the electric drive motor according to the throttle pedal opening and responds to the corresponding speed request.

5. The control method for the range-extended hybrid motorboat system according to claim 4, characterized in that, Step S3 further includes: If it is not confirmed that the battery voltage is normal, the range-extended hybrid motorboat system is working normally, and the system components are fault-free, the range-extended hybrid motorboat system will indicate overvoltage, undervoltage, or system component failure.

6. The control method for the range-extended hybrid motorboat system according to claim 4, characterized in that, Step S5 further includes: If it is not confirmed that the high voltage status of the range-extended hybrid motorboat system is normal and that it is operating normally at high voltage, the range-extended hybrid motorboat system will indicate a high voltage component status detection error, pre-charge detection failure, or a high voltage prohibition fault status for the range-extended hybrid motorboat system.

7. The control method for the range-extended hybrid motorboat system according to claim 4, characterized in that, Step S7 further includes: If it is not confirmed that the range extender of the range-extended hybrid motorboat system is in normal condition and has started normally, the range-extended hybrid motorboat system will indicate a start-up failure or a start-prohibited fault status.

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