Vehicle energy management method, device and vehicle

Abstract

The present invention relates to the field of vehicles and provides a vehicle energy management method, device, and vehicle. The method comprises: when a target vehicle is accelerating or traveling at a constant speed, if the current connection state between the target vehicle and the power grid is connected, determining a first output power of the power battery, a second output power and a third output power of a voltage conversion device, and a target operating point of the engine based on the current output voltage of the power grid, the current state of charge of the power battery, and the current required driving power of the target vehicle; controlling the motor system to provide a first driving power based on the first output power, the second output power, and a preset operating model of each motor in the motor system; controlling the engine to provide a second driving power based on the target operating point; and controlling the charging of the power battery based on the third output power. The present invention can effectively meet environmental protection and energy conservation requirements while ensuring efficient operation of the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a vehicle energy management method, device and vehicle. Background Art

[0002] With the continuous increase in global energy demand, the gradual depletion of petrochemical resources, and the continuous upgrading of environmental protection requirements, people's requirements for environmentally friendly and energy-saving vehicles are becoming increasingly stringent. Hybrid vehicles can use both engines and power batteries as power sources, thereby improving fuel efficiency and reducing emissions. Compared with traditional gasoline or diesel vehicles, they are more environmentally friendly and energy-efficient, and have therefore experienced rapid development.

[0003] However, in hybrid vehicles, power batteries still have problems such as long charging time, large demand for battery replacement sites, rapid battery degradation, and short driving range at low temperatures. At the same time, it is difficult to ensure the working efficiency of the motor and engine, making it difficult to effectively meet environmental protection and energy-saving requirements while ensuring efficient operation of the vehicle. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a vehicle energy management method, device and vehicle.

[0005] The present invention provides a vehicle energy management method, comprising:

[0006] When the target vehicle is accelerating or traveling at a constant speed, if the current connection state between the target vehicle and the wire network is connected, obtaining the current output voltage of the wire network, the current state of charge of the power battery of the target vehicle, and the current required driving power of the target vehicle;

[0007] Determining, based on the current output voltage, the current state of charge, and the current required driving power, a first output power of the power battery, a second output power and a third output power of the voltage conversion device of the target vehicle, and a target operating point of the engine of the target vehicle; wherein the voltage conversion device is used to perform voltage conversion on the electrical energy output by the power grid;

[0008] Based on the first output power, the second output power, and the preset working model of each motor in the motor system of the target vehicle, the motor system is controlled to provide a first driving power, the engine is controlled to provide a second driving power based on the target operating point of the engine, and the power battery is controlled to be charged based on the third output power; wherein, the motor system includes multiple motors.

[0009] According to the vehicle energy management method provided by the present invention, the determining, based on the current output voltage, the current state of charge, and the current required driving power, of the first output power of the power battery, the second output power and the third output power of the voltage conversion device of the target vehicle, and the target operating point of the engine of the target vehicle includes:

[0010] determining a current output power limit of the voltage conversion device based on the current output voltage;

[0011] Based on the current state of charge, the comparison result of the current output voltage and the preset voltage threshold, and the comparison result of the current required driving power and the current output power limit, the first output power, the second output power, the third output power and the target operating point of the engine are determined.

[0012] According to the vehicle energy management method provided by the present invention, determining the first output power, the second output power, the third output power, and the target operating point of the engine based on the current state of charge, a comparison result of the current output voltage and a preset voltage threshold, and a comparison result of the current required driving power and the current output power limit includes:

[0013] If the currently required driving power is less than or equal to the currently output power limit, the operating point corresponding to the engine shutdown state is used as the target operating point of the engine, and the first output power, the second output power, and the third output power are determined based on the currently charged state and the currently required driving power;

[0014] If the current required driving power is greater than the current output power limit, the first output power, the second output power, the third output power and the target operating point of the engine are determined based on the current state of charge and the comparison result of the current output voltage with the preset voltage threshold.

[0015] According to the vehicle energy management method provided by the present invention, determining the first output power, the second output power, and the third output power based on the current state of charge and the current required driving power includes:

[0016] If the current state of charge is greater than a first preset state of charge limit, setting the third output power to 0, determining the first output power based on the output power limit of the power battery, and determining the second output power based on the difference between the current required driving power and the first output power, until the current state of charge reaches the second preset state of charge limit;

[0017] If the current state of charge is less than or equal to the second preset state of charge limit, the first output power is set to 0, and the second output power is determined based on the current required driving power, and the third output power is determined based on the difference between the current output power limit and the current required driving power, until the current state of charge reaches the first preset state of charge limit; wherein the second preset state of charge limit is less than the first preset state of charge limit.

[0018] According to the vehicle energy management method provided by the present invention, determining the first output power, the second output power, the third output power, and the target operating point of the engine based on the current state of charge and the comparison result of the current output voltage with the preset voltage threshold includes:

[0019] If the current output voltage is greater than the preset voltage threshold, based on the current state of charge, the first output power, the second output power, the third output power, and the target operating point of the engine are determined in a motor drive priority mode;

[0020] If the current output voltage is less than or equal to the preset voltage threshold, the preset operating point is used as the target operating point of the engine, and the first output power, the second output power and the third output power are determined based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point.

[0021] According to the vehicle energy management method provided by the present invention, the first output power, the second output power, the third output power, and the target operating point of the engine are determined based on the current state of charge using a motor drive priority mode, including:

[0022] If the current state of charge is greater than a third preset state of charge limit, setting the third output power to 0, and determining the first output power, the second output power, and the target operating point of the engine based on the current required driving power;

[0023] If the current state of charge is less than or equal to the third preset state of charge limit, the first output power is set to 0, and the second output power, the third output power and the target operating point of the engine are determined based on the comparison result of the current state of charge and the second preset state of charge limit; wherein the second preset state of charge limit is less than the third preset state of charge limit.

[0024] According to the vehicle energy management method provided by the present invention, determining the first output power, the second output power, and the third output power based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point includes:

[0025] If the current state of charge is greater than a second preset state of charge limit, setting the third output power to 0, and determining the first output power and the second output power based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point;

[0026] If the current state of charge is less than or equal to the second preset state of charge limit, the first output power is set to 0, and the second output power and the third output power are determined based on the current output power limit and the difference between the current required driving power and the power corresponding to the preset operating point.

[0027] According to the vehicle energy management method provided by the present invention, controlling the motor system to provide the first driving power based on the first output power, the second output power, and a preset operating model of each motor in the motor system of the target vehicle includes:

[0028] Determining a target operating range for each motor and a power range corresponding to the target operating range based on a preset operating efficiency range and a preset operating model for each motor; wherein the preset operating model is used to characterize the corresponding relationship between the operating point, operating efficiency, and power of the corresponding motor;

[0029] Determining a target motor among the multiple motors and an output power corresponding to the target motor based on the first output power, the second output power, and a power interval corresponding to a target operating range of each of the motors;

[0030] A target operating point of the target motor is determined based on the output power corresponding to the target motor.

[0031] The present invention also provides a vehicle energy management device, comprising:

[0032] A first processing module is configured to obtain, when the target vehicle is accelerating or traveling at a constant speed, a current output voltage of the wire network, a current state of charge of a power battery of the target vehicle, and a current required driving power of the target vehicle if the current connection state between the target vehicle and the wire network is connected;

[0033] a second processing module, configured to determine, based on the current output voltage, the current state of charge, and the current required driving power, a first output power of the power battery, a second output power and a third output power of the voltage conversion device of the target vehicle, and a target operating point of the engine of the target vehicle; wherein the voltage conversion device is configured to perform voltage conversion on the electrical energy output by the power grid;

[0034] a third processing module, configured to control the motor system to provide a first driving power based on the first output power, the second output power, and a preset operating model of each motor in the motor system of the target vehicle, control the engine to provide a second driving power based on a target operating point of the engine, and control charging of the power battery based on the third output power; wherein the motor system includes multiple motors.

[0035] The present invention also provides a vehicle, which adopts any one of the vehicle energy management methods described above, or includes the vehicle energy management device described above.

[0036] The vehicle energy management method, device and vehicle provided by the present invention obtain the current output voltage of the network, the current charge state of the power battery of the target vehicle, and the current required driving power of the target vehicle when the current connection state between the target vehicle and the network is connected and the target vehicle is in the process of accelerating or driving at a constant speed, and determine the first output power of the power battery, the second output power and the third output power of the voltage conversion device, and the target operating point of the engine of the target vehicle based on the current output voltage, the current charge state and the current required driving power, so as to control the motor system of the target vehicle to provide the first driving power based on the first output power, the second output power and the preset working model of each motor in the motor system of the target vehicle, control the engine to provide the second driving power based on the target operating point of the engine, and control the charging of the power battery based on the third output power, so as to effectively meet the requirements of environmental protection and energy saving while ensuring the efficient operation of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a flow chart of the vehicle energy management method provided by the present invention;

[0039] Figure 2It is a structural schematic diagram of the vehicle energy management device provided by the present invention;

[0040] Figure 3 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0042] The following combination Figure 1 The vehicle energy management method of the present invention is described. The vehicle energy management method of the present invention is executed by an electronic device such as a control device or the hardware and / or software therein. The control device can be an existing control device in the vehicle, such as a vehicle controller, or a newly added control device. Figure 1 As shown, the vehicle energy management method according to the embodiment of the present invention includes at least the following steps:

[0043] S101. When a target vehicle is accelerating or traveling at a constant speed, if the current connection state between the target vehicle and the wired network is connected, obtaining a current output voltage of the wired network, a current state of charge of a power battery of the target vehicle, and a current required driving power of the target vehicle;

[0044] S102: Determine, based on the current output voltage, the current state of charge, and the current required driving power, a first output power of the power battery, a second output power and a third output power of a voltage conversion device of the target vehicle, and a target operating point of an engine of the target vehicle; wherein the voltage conversion device is configured to perform voltage conversion on electrical energy output by the power grid;

[0045] S103. Based on the first output power, the second output power, and a preset working model of each motor in the motor system of the target vehicle, control the motor system to provide a first driving power; based on the target working point of the engine, control the engine to provide a second driving power; and, based on the third output power, control charging of the power battery; wherein the motor system includes multiple motors.

[0046] In this embodiment, the target vehicle is the vehicle currently undergoing energy management. When the network is connected to the target vehicle, the network can provide the target vehicle with electrical energy. The current connection status between the target vehicle and the network is the connection status between the target vehicle and the network at the current moment, which can include connection and disconnection. The current output voltage of the network is the output voltage of the network at the current moment, which can change in real time. For example, it can change according to the number of vehicles running in the network, and it can also change according to the output capacity of the network. The current state of charge of the power battery is the state of charge of the power battery at the current moment.

[0047] When it is detected that the target vehicle is accelerating or traveling at a constant speed, the current connection status of the target vehicle and the network can be obtained in real time. If the current connection status of the target vehicle and the network is connected, the current output voltage of the network and the current charge state of the target vehicle's power battery can be obtained. At the same time, the current required driving power of the target vehicle can be obtained in real time according to the driver's driving intention. For example, the current required driving power of the target vehicle can be obtained according to the inclination angle of the accelerator pedal, the gear setting, etc.

[0048] The target vehicle's voltage conversion device can be a bidirectional voltage conversion device capable of stepping up and down voltages, as well as bidirectional power output. One end of the voltage conversion device can be connected to the power grid via a power receiving device, and the other end can be connected to the target vehicle's power management device. When the target vehicle is currently connected to the power grid, the voltage conversion device converts the power output from the power grid and outputs it to the power management device. This effectively reduces the risk of the target vehicle malfunctioning due to insufficient energy during operation. Furthermore, the voltage conversion device effectively ensures the stability of the power provided to the power management device by the power grid, providing voltage clamping protection for the target vehicle's electrical equipment. Furthermore, the device is compatible with power grids with multiple voltage platforms and wide voltage fluctuations. The voltage conversion device can also be an isolated voltage conversion device to ensure electrical isolation between the power grid's high voltage and the power battery's high voltage, further enhancing electrical safety.

[0049] The power management device can also be connected to the power battery, motor controller and high-voltage electrical equipment (such as motor inverter, electric air conditioner, electric defrost, etc.). The electric energy output by the voltage conversion and / or the electric energy output by the power battery can be used to power the motor system and high-voltage electrical equipment of the target vehicle through the power management device. At the same time, the electric energy output by the voltage conversion device can also be used to charge the power battery through the power management device. Therefore, when the target vehicle is connected to the power network, the risk of the target vehicle being unable to operate normally due to insufficient energy during operation can be effectively reduced.

[0050] The target vehicle's motor system can include multiple motors, each of which can be a low-torque, high-speed motor. Each motor can have its own corresponding motor controller, or multiple motors can have one all-in-one motor controller. As an optional implementation, the motor system can include two motors. By replacing high-torque motors with multiple motors, the motor system's output torque and output power are wider, effectively meeting the vehicle's different operating conditions and further ensuring efficient vehicle operation.

[0051] The engine is used to convert the energy provided by the fuel into mechanical energy, so as to provide driving power for the target vehicle with the mechanical energy provided by the engine. For example, the engine can be a fuel engine, LNG (Liquefied Natural Gas, liquefied natural gas) engine, CNG (Compressed Natural Gas, compressed natural gas) engine, hydrogen engine, methanol engine etc. It is understandable that the generator of the target vehicle can also be driven to work by the mechanical energy provided by the engine, so as to charge the power battery with electric energy. The engine and multiple motors can all be connected to the power coupling box of the target vehicle, so as to couple the first driving power provided by the power coupling box to the motor system and the second driving power provided by the engine, and then drive the target vehicle to run.

[0052] In actual applications, when the target vehicle is accelerating or traveling at a constant speed, if the current connection status between the target vehicle and the power grid is connected, the first output power of the power battery, the second output power of the voltage conversion device, the third output power of the voltage conversion device, and the target operating point of the engine can be determined based on the current output voltage, the current state of charge, and the current required driving power. This allows the timing of the power battery and engine intervention to be adjusted in real time according to the current output voltage of the power grid, the current state of charge of the power battery, and the current required driving power of the target vehicle, and the power mode to be selected as needed. This ensures that the target vehicle operates efficiently while effectively meeting environmental protection and energy-saving requirements, and also increases the cruising range of the target vehicle. At the same time, through a variety of different driving modes, it can be applied to different working conditions, with higher vehicle operating efficiency and a wider range of applicable scenarios.

[0053] The first output power of the power battery and the second output power of the voltage conversion device are used to provide electrical energy to the motor system, thereby providing a first driving power to the target vehicle through the motor system. The third output power of the voltage conversion device is used to charge the power battery. The target operating point of the engine can include the target speed and target torque of the engine, so that the engine operating point can be adjusted according to the current output voltage of the power grid, the current state of charge of the power battery, and the current required driving power of the target vehicle. When the engine is engaged, it can effectively ensure that the engine operates in the high-efficiency zone, thereby effectively meeting environmental protection and energy-saving requirements.

[0054] For example, the current output power limit of the voltage conversion device can be determined based on the current output voltage, and the first output power of the power battery, the second output power of the voltage conversion device, the third output power of the voltage conversion device and the target operating point of the engine can be determined according to the current state of charge, the comparison result of the current output voltage and the preset voltage threshold, and the comparison result of the current required driving power and the current output power limit.

[0055] After determining the first output power, the second output power, the third output power, and the target operating point of the engine, the motor system of the target vehicle can be controlled to provide the first driving power based on the first output power, the second output power, and the preset operating model of each motor in the motor system, wherein the preset operating model is used to characterize the corresponding relationship between the operating point, operating efficiency, and power of the corresponding motor. For example, based on the preset operating efficiency range and the preset operating model of each motor, the target operating range and the power range corresponding to the target operating range can be determined for each motor; based on the first output power, the second output power, and the power range corresponding to the target operating range of each motor, a target motor among the multiple motors and the output power corresponding to the target motor are determined; and then based on the output power corresponding to the target motor, the target operating point of the target motor is determined to control some or all of the motors to provide the first driving power. This allows the output characteristics of each motor to be utilized to intelligently distribute the power output of each motor, effectively ensuring that the target motors operate in their respective high-efficiency zones while meeting the efficient operation of the target vehicle, thereby effectively meeting environmental protection and energy conservation requirements.

[0056] In addition, when the target vehicle is accelerating or traveling at a constant speed, if the current connection status between the target vehicle and the network is disconnected, the first driving power of the motor system and / or the second driving power of the engine can be determined based on one or more of the current vehicle speed, the current charge state of the power battery, and the current required driving power. The first driving power is provided by the power battery to ensure the normal operation of the target vehicle while meeting the requirements of environmental protection and energy saving to the greatest extent. For example, when the current state of charge is greater than a third preset state of charge limit, if the current vehicle speed is less than or equal to the first preset vehicle speed, the first driving power may be determined based on the current required driving power, and the second driving power may be set to 0; if the current vehicle speed is greater than the first preset vehicle speed and less than or equal to the second preset vehicle speed, the second driving power may be determined based on the current required driving power, and the first driving power may be set to 0; if the current vehicle speed is greater than the second preset vehicle speed, the first driving power and the second driving power may be determined based on the current required driving power, for example, the ratio of the first driving power to the second driving power may be determined based on the current state of charge, and the first driving power and the second driving power may be determined based on the current required driving power and the ratio of the first driving power to the second driving power; if the current state of charge is less than or equal to the third preset state of charge limit, the second driving power may be determined based on the current required driving power, and the first driving power may be set to 0. The first preset vehicle speed is less than the second preset vehicle speed.

[0057] It is understood that if the current state of charge is less than the second preset state of charge limit, the engine can also be controlled to simultaneously provide the second driving power and charging power to the target vehicle until the current state of charge of the power battery reaches the first preset state of charge limit, so as to adapt to different operating conditions. The second preset state of charge limit is less than the third preset state of charge limit, and the third preset state of charge limit is less than the first preset state of charge limit. For example, the first preset state of charge limit can be used to represent the upper limit of the power battery's charging, the second preset state of charge limit can be used to represent the lower limit of the power battery's usable range, and the third preset state of charge limit can be used to represent the lower limit of the power battery's condition for providing driving power.

[0058] As an optional embodiment, when the target vehicle is decelerating and / or traveling downhill, the power management device may also capture braking energy. Based on the current connection status between the target vehicle and the power grid and the current state of charge of the power battery, the power management device may be controlled to feed braking energy back to the voltage conversion device and / or the power battery. For example, if the current state of charge is less than a first preset state of charge limit, the power management device may be controlled to feed braking energy back to the power battery. That is, when the current state of charge is less than or equal to the first preset state of charge limit, braking energy is fed back to the power battery regardless of whether the current connection status is connected or disconnected. If the current state of charge is greater than the first preset state of charge limit and the current connection status is connected, the power management device may be controlled to feed braking energy back to the voltage conversion device. The voltage conversion device may convert the braking energy allocated by the power management device into voltage and feed it back to the power grid to ensure the effective reception of the braking energy by the power grid. This achieves multi-path feedback of braking energy, ensuring the reliability of electric braking while achieving efficient recovery of braking energy.

[0059] Additionally, if the current state of charge is less than a first preset state of charge limit and the current connection state is connected, a braking energy regenerative ratio between the power battery and the voltage conversion device may be determined based on the current state of charge, and the power management device may be controlled to regenerate braking energy to the power battery and the voltage conversion device based on the braking energy regenerative ratio. For example, the braking energy regenerative ratio corresponding to the current state of charge may be determined based on a preset correspondence between the state of charge and the braking energy regenerative ratio.

[0060] It can be understood that the power management device can also be connected to a preset energy consumption device, which can be a braking resistor or a retarder arranged at the rear end of the gearbox. It can also control the power management device to transmit braking energy to the preset energy consumption device when the current state of charge is greater than the first preset state of charge limit and the current connection state is disconnected, or when the braking energy feedback path of the power management device fails, so as to consume the braking energy through the preset energy consumption device, thereby further ensuring the continuous effectiveness of the electric braking force during the operation of the target vehicle.

[0061] As another optional embodiment, when the target vehicle is stationary, the third output power of the voltage conversion device or the charging power to be provided by the engine can also be determined based on the current connection status of the target vehicle and the power grid and the current state of charge of the power battery. For example, when the current connection status is connected, if the current state of charge of the power battery is less than a third preset state of charge limit, the third output power of the voltage conversion device can be determined based on the current output power limit of the voltage conversion device. When the current connection status is disconnected, if the current state of charge of the power battery is less than the third preset state of charge limit, the power connection status of the target vehicle's onboard charging device is obtained. If the power connection status is connected, the onboard charging device is controlled to provide charging power to the target vehicle. If both the current connection status and the power connection status are disconnected, and the current state of charge of the power battery is less than the second preset state of charge limit, the preset charging power of the power battery can be used as the charging power to be provided by the engine, that is, the engine is forced to start to charge the power battery, thereby effectively preventing the power battery from affecting the normal operation of the target vehicle.

[0062] This embodiment obtains the current output voltage of the power network, the current state of charge of the power battery of the target vehicle, and the current required driving power of the target vehicle when the current connection state between the target vehicle and the power network is connected and the target vehicle is in the process of accelerating or traveling at a constant speed, and determines the first output power of the power battery, the second output power and the third output power of the voltage conversion device, and the target operating point of the engine of the target vehicle based on the current output voltage, the current state of charge and the current required driving power, so as to control the motor system of the target vehicle to provide the first driving power based on the first output power, the second output power and the preset operating model of each motor in the motor system of the target vehicle, control the engine to provide the second driving power based on the target operating point of the engine, and control the charging of the power battery based on the third output power, so as to effectively meet the requirements of environmental protection and energy saving while ensuring the efficient operation of the vehicle.

[0063] In an exemplary embodiment, determining the first output power of the power battery, the second and third output powers of the voltage conversion device of the target vehicle, and the target operating point of the engine of the target vehicle based on the current output voltage, the current state of charge, and the current required driving power includes:

[0064] determining a current output power limit of the voltage conversion device based on the current output voltage;

[0065] Based on the current state of charge, the comparison result of the current output voltage and the preset voltage threshold, and the comparison result of the current required driving power and the current output power limit, the first output power, the second output power, the third output power and the target operating point of the engine are determined.

[0066] In this embodiment, the current output power limit of the voltage conversion device can be determined based on the current output voltage. For example, the current output power limit of the voltage conversion device can be determined based on the correspondence between the output voltage and the output power limit and the current output voltage. The current output power limit of the voltage conversion device can also be determined based on the comparison result of the current output voltage and the preset voltage threshold. For example, if the current output voltage is greater than the preset voltage threshold, the first power value is used as the current output power limit of the voltage conversion device; if the current output voltage is less than or equal to the preset voltage threshold, the second power value is used as the current output power limit of the voltage conversion device.

[0067] Among them, the preset voltage threshold is used to characterize the output capacity of the line network. When the current output voltage is greater than the preset voltage threshold, it indicates that the line network can output power normally. If the current output voltage is less than or equal to the preset voltage threshold, it indicates that the line network is outputting power at a reduced capacity.

[0068] After determining the current output power limit of the voltage conversion device, the first output power of the power battery, the second and third output powers of the voltage conversion device, and the target operating point of the engine can be determined based on the current state of charge, the comparison result of the current output voltage with the preset voltage threshold, and the comparison result of the current required driving power with the current output power limit. For example, when the current required driving power is less than or equal to the current output power limit, the engine can be controlled to shut down. For example, the operating point corresponding to the engine shutdown state is used as the target operating point of the engine, and the first, second, and third output powers are determined based on the current state of charge and the current required driving power. When the current required driving power is greater than the current output power limit, the first output power, the second output power, the third output power and the target operating point of the engine are further determined based on the current state of charge and the comparison result of the current output voltage and the preset voltage threshold. Therefore, the intervention timing of the power battery and the engine can be adjusted in real time according to the current output voltage of the line network, the current state of charge of the power battery and the current required driving power of the target vehicle, the power mode can be selected as needed, and the working efficiency of the engine can be effectively guaranteed after the engine intervenes, thereby effectively meeting the environmental protection and energy-saving requirements while ensuring the efficient operation of the target vehicle, and improving the cruising range of the target vehicle.

[0069] In an exemplary embodiment, determining the first output power, the second output power, the third output power, and the target operating point of the engine based on the current state of charge, a comparison result of the current output voltage and a preset voltage threshold, and a comparison result of the current required driving power and the current output power limit includes:

[0070] If the currently required driving power is less than or equal to the currently output power limit, the operating point corresponding to the engine shutdown state is used as the target operating point of the engine, and the first output power, the second output power, and the third output power are determined based on the currently charged state and the currently required driving power;

[0071] If the current required driving power is greater than the current output power limit, the first output power, the second output power, the third output power and the target operating point of the engine are determined based on the current state of charge and the comparison result of the current output voltage with the preset voltage threshold.

[0072] In this embodiment, when the current required driving power is less than or equal to the current output power limit, the operating point corresponding to the engine shutdown state can be used as the target operating point of the engine, that is, the engine is controlled to be in the shutdown state and does not intervene in the driving of the target vehicle, the second driving power is 0, and the motor system independently provides driving power for the target vehicle. At this time, the first output power, the second output power, and the third output power can be determined based on the current state of charge and the current required driving power. For example, the first output power can be 0, and the second output power and the third output power can be greater than 0, so that the voltage conversion device can simultaneously provide electrical energy to the motor system and charging power to the power battery. Alternatively, the first output power and the third output power can be both 0, and the second output power can be greater than 0, so that the voltage conversion device can independently provide electrical energy to the motor system. Alternatively, the first output power can be greater than 0, and the second output power and the third output power can be both 0, so that the power battery can independently provide electrical energy to the motor system. Alternatively, the third output power can be 0, and the first output power and the second output power can be both greater than 0, so that the power battery and the voltage conversion device can jointly provide electrical energy to the motor system.

[0073] When the current required driving power is greater than the current output power limit, the first output power, the second output power, the third output power, and the target operating point of the engine can be determined based on the current state of charge and the comparison result of the current output voltage with the preset voltage threshold. For example, when the current output voltage is greater than the preset voltage threshold, the first output power, the second output power, the third output power, and the target operating point of the engine can be determined based on the current state of charge using the motor drive priority mode; when the current output voltage is less than or equal to the preset voltage threshold, the first output power, the second output power, the third output power, and the target operating point of the engine can be determined based on the current state of charge using the engine drive priority mode. This allows the timing of intervention of the power battery and the engine to be adjusted in real time according to the operating conditions of the target vehicle, and the power mode to be selected as needed. This ensures that the efficient operation of the target vehicle is ensured while effectively meeting environmental protection and energy-saving requirements and improving the cruising range of the target vehicle.

[0074] In an exemplary embodiment, determining the first output power, the second output power, and the third output power based on the current state of charge and the current required driving power includes:

[0075] If the current state of charge is greater than a first preset state of charge limit, setting the third output power to 0, determining the first output power based on the output power limit of the power battery, and determining the second output power based on the difference between the current required driving power and the first output power, until the current state of charge reaches the second preset state of charge limit;

[0076] If the current state of charge is less than or equal to the second preset state of charge limit, the first output power is set to 0, and the second output power is determined based on the current required driving power, and the third output power is determined based on the difference between the current output power limit and the current required driving power, until the current state of charge reaches the first preset state of charge limit; wherein the second preset state of charge limit is less than the first preset state of charge limit.

[0077] In this embodiment, when the current required driving power is less than or equal to the current output power limit, the motor system independently provides driving power to the target vehicle. When the current state of charge (SOC) exceeds a first preset SOC limit, the third output power can be set to zero, eliminating the need to charge the power battery. Simultaneously, the first output power can be determined based on the power battery's output power limit, prioritizing the power battery to provide electrical energy to the motor system. This allows for braking energy regenerative feedback from the power battery, thereby improving the reliability of electric braking. After determining the first output power, a second output power can be determined based on the difference between the current required driving power and the first output power. This allows the voltage conversion device to supplement the remaining power, ensuring efficient operation of the target vehicle. Furthermore, the power output ratio corresponding to the current SOC can be determined based on the current SOC and a preset correspondence between the SOC and the power output ratio. The first and second output powers can then be determined based on the power output ratio corresponding to the current SOC and the current required driving power. Among them, when the current required driving power is less than or equal to the current output power limit, the output of the power battery can be continuously controlled based on the first output power, and the output of the voltage conversion device can be controlled based on the second output power until the current state of charge reaches the second preset state of charge limit.

[0078] When the current state of charge is less than or equal to the second preset state of charge limit, the first output power can be set to 0 to control the power battery to stop operating. Simultaneously, the second output power is determined based on the current required driving power. For example, the current required driving power can be directly used as the second output power, and the third output power is determined based on the difference between the current output power limit of the voltage conversion device and the second output power. This allows the voltage conversion device to independently provide power to the motor system while simultaneously charging the power battery using the remaining capacity of the voltage conversion device. When the current required driving power is less than or equal to the current output power limit, the output of the voltage conversion device can be continuously controlled based on the second and third output powers until the current state of charge reaches the first preset state of charge limit.

[0079] It can be understood that when the current state of charge is less than or equal to the first preset state of charge limit and greater than the second preset state of charge limit, the first output power and the third output power can both be set to 0, and the second output power can be determined based on the current output power limit of the voltage conversion device to independently provide electrical energy to the motor system through the voltage conversion device.

[0080] In an exemplary embodiment, determining the first output power, the second output power, the third output power, and the target operating point of the engine based on the current state of charge and a comparison result of the current output voltage with the preset voltage threshold includes:

[0081] If the current output voltage is greater than the preset voltage threshold, based on the current state of charge, the first output power, the second output power, the third output power, and the target operating point of the engine are determined in a motor drive priority mode;

[0082] If the current output voltage is less than or equal to the preset voltage threshold, the preset operating point is used as the target operating point of the engine, and the first output power, the second output power and the third output power are determined based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point.

[0083] In this embodiment, when the current required driving power exceeds the current output power limit, and if the current output voltage of the power grid is greater than a preset voltage threshold, the motor drive priority mode can be used to determine the first, second, and third output powers, as well as the target engine operating point, based on the current state of charge. For example, if the power battery meets the power output conditions based on the current state of charge, the motor system can be used to drive the target vehicle. If the power battery does not meet the power output conditions, the engine can be controlled to intervene, and the target vehicle can be driven by both the engine and the motor system. When the target vehicle is driven jointly by the engine and the motor system, the target operating point of the engine can be determined based on the current state of charge, and the remaining power can be supplemented by the voltage conversion device, or the remaining power can be supplemented and the charging power can be provided by the voltage conversion device at the same time; when it is determined based on the current state of charge that the power battery meets the charging conditions, the target operating point of the engine can be determined based on the current state of charge, and the remaining power can be supplemented and the charging power can be provided at the same time through the voltage conversion device; when it is determined based on the current state of charge that the power battery does not meet the charging conditions, the voltage conversion device can be controlled to provide a second output power based on the current output power limit, and the target operating point of the engine can be determined based on the difference between the current required driving power and the second output power, so as to effectively meet the environmental protection and energy saving requirements while ensuring the efficient operation of the target vehicle.

[0084] If the current output voltage of the network is less than or equal to the preset voltage threshold, the first output power, the second output power, the third output power and the target operating point of the engine can be determined based on the current state of charge using the engine drive priority mode. For example, the preset operating point can be used as the target operating point of the engine so that the engine operates in a high-efficiency zone, and the first output power, the second output power and the third output power are determined based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point. That is, the insufficient part of the engine driving power can be supplemented by the motor system, thereby effectively improving the engine's operating efficiency while ensuring the efficient operation of the target vehicle, further meeting environmental protection and energy-saving requirements.

[0085] The preset operating point may be a first preset operating point. For example, based on a preset operating curve of the engine, when a first preset power range of the engine is satisfied, the operating point at which the engine fuel consumption rate is lowest is used as the first preset operating point. The preset operating curve of the engine may be used to characterize the correspondence between the operating point, fuel consumption rate, and power. The operating point may include engine speed and engine speed torque, so that the power corresponding to the preset operating point may be determined based on the preset operating curve of the engine. For example, the preset operating curve of the engine may be an external characteristic curve of the engine.

[0086] In an exemplary embodiment, determining the first output power, the second output power, the third output power, and the target operating point of the engine based on the current state of charge in a motor drive priority mode includes:

[0087] If the current state of charge is greater than a third preset state of charge limit, setting the third output power to 0, and determining the first output power, the second output power, and the target operating point of the engine based on the current required driving power;

[0088] If the current state of charge is less than or equal to the third preset state of charge limit, the first output power is set to 0, and the second output power, the third output power and the target operating point of the engine are determined based on the comparison result of the current state of charge and the second preset state of charge limit; wherein the second preset state of charge limit is less than the third preset state of charge limit.

[0089] In this embodiment, when the current state of charge is greater than the third preset state of charge limit, it indicates that the power battery meets the power output conditions and does not need to be charged. The third output power can be set to 0. Simultaneously, the first output power and the second output power are determined based on the current required driving power. For example, the current output power limit can be used as the second output power, and the first output power is determined based on the difference between the current required driving power and the second output power. When the difference between the current required driving power and the second output power is greater than the power battery's output power limit, the power battery's output power limit can be used as the first output power. When the difference between the current required driving power and the second output power is less than or equal to the power battery's output power limit, the difference between the current required driving power and the second output power can be used as the first output power. Furthermore, the target operating point of the engine can be determined based on the difference between the current required driving power and the electric drive power, where the electric drive power is the sum of the first output power and the second output power. For example, when the difference between the current required driving power and the electric driving power is greater than the preset power value, the target operating point can be determined based on the difference between the current required driving power and the electric driving power and the preset operating curve of the engine; when the difference between the current required driving power and the electric driving power is less than or equal to the preset power value, the target vehicle can be controlled to operate at reduced power, thereby effectively meeting the requirements of environmental protection and energy saving while ensuring the efficient operation of the vehicle.

[0090] When the current state of charge is less than or equal to the third preset state of charge limit, it indicates that the power battery does not meet the power output conditions. The first output power can be set to 0, and the second output power, third output power and target operating point of the engine are determined based on the comparison result of the current state of charge and the second preset state of charge limit to control the engine intervention and drive the target vehicle jointly by the engine and the motor system.

[0091] For example, when the current required driving power is greater than the current output power limit, if the current state of charge is greater than the second preset state of charge limit, indicating that the power battery does not meet charging conditions, the third output power can be set to 0. At the same time, the second preset operating point can be used as the target operating point of the engine to enable the engine to operate in the high-efficiency range. At the same time, the second output power is determined based on the difference between the current required driving power and the power corresponding to the second preset operating point. The power corresponding to the second preset operating point is less than the current output power limit of the voltage conversion device, so that the voltage conversion device can supplement the remaining required power. This can effectively improve the operating efficiency of the engine while ensuring the efficient operation of the target vehicle, and meet environmental protection and energy conservation requirements.

[0092] When the current demanded driving power is greater than the current output power limit, if the current state of charge is less than or equal to the second preset state of charge limit, indicating that the power battery meets the charging conditions, the third preset operating point can be used as the target operating point of the engine to enable the engine to operate in the high-efficiency zone. Simultaneously, the second and third output powers are determined based on the current demanded driving power, the power corresponding to the third preset operating point, and the current output power limit. For example, the second output power can be determined based on the difference between the current demanded driving power and the power corresponding to the third preset operating point, and the third output power can be determined based on the difference between the current output power limit and the second output power. This effectively improves the operating efficiency of the engine while ensuring the efficient operation of the target vehicle, further satisfying environmental protection and energy conservation requirements.

[0093] Among them, the second preset operating point can be determined by: based on the preset operating curve of the engine, when the second preset power range of the engine is met, the operating point with the lowest engine fuel consumption rate is used as the second preset operating point. At the same time, the power corresponding to the second preset operating point can be determined based on the preset operating curve of the engine.

[0094] The third preset operating point can be determined by: based on the preset operating curve of the engine, when the third preset power range of the engine is met, the operating point with the lowest fuel consumption rate of the engine is used as the third preset operating point. At the same time, the power corresponding to the third preset operating point can be determined based on the preset operating curve of the engine.

[0095] It should be noted that the power corresponding to the first preset power range is greater than the powers corresponding to the third preset power range, and the power corresponding to the third preset power range is greater than or equal to the powers corresponding to the second preset power range. At the same time, the power corresponding to the first preset operating point is greater than the power corresponding to the third preset operating point, and the power corresponding to the third preset operating point is greater than or equal to the power corresponding to the second preset operating point.

[0096] In an exemplary embodiment, determining the first output power, the second output power, and the third output power based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point includes:

[0097] If the current state of charge is greater than a second preset state of charge limit, setting the third output power to 0, and determining the first output power and the second output power based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point;

[0098] If the current state of charge is less than or equal to the second preset state of charge limit, the first output power is set to 0, and the second output power and the third output power are determined based on the current output power limit and the difference between the current required driving power and the power corresponding to the preset operating point.

[0099] In this embodiment, when the current required driving power is greater than the current output power limit, if the current state of charge is greater than the second preset state of charge limit, indicating that the power battery does not meet the charging conditions, the third output power can be set to 0, and the first output power and the second output power can be determined based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point. The difference between the current required driving power and the power corresponding to the preset operating point can be used as the electric driving power.

[0100] For example, if the current state of charge is greater than a first preset state of charge, a first output power is determined based on the power battery's output power limit, and a second output power is determined based on the difference between the electric drive power and the first output power. This prioritizes electric drive power from the power battery, and the voltage conversion device supplements the shortfall. This allows for braking energy feedback from the power battery, improving the reliability of electric braking. If the current state of charge is less than or equal to the first preset state of charge limit and greater than the second preset state of charge limit, the first output power can be set to 0, disabling the power battery. The second output power is then determined based on the electric drive power, allowing the voltage conversion device to independently provide electric drive power. This ensures efficient operation of the target vehicle while fully utilizing the power provided by the power grid, thereby increasing the target vehicle's range.

[0101] When the current required driving power is greater than the current output power limit, if the current state of charge is less than or equal to the second preset state of charge limit, it indicates that the power battery meets the charging conditions. The first output power can be set to 0, the power battery is not working, and the second output power and third output power are determined based on the current output power limit and the electric driving power.

[0102] For example, the second output power can be determined based on the electric drive power, and the third output power can be determined based on the difference between the current output power limit and the second output power. This ensures that the target vehicle can operate efficiently while fully utilizing the electric energy provided by the line network, thereby improving the cruising range of the target vehicle.

[0103] In an exemplary embodiment, controlling the motor system to provide the first driving power based on the first output power, the second output power, and a preset operating model of each motor in the motor system of the target vehicle includes:

[0104] Determining a target operating range for each motor and a power range corresponding to the target operating range based on a preset operating efficiency range and a preset operating model for each motor; wherein the preset operating model is used to characterize the corresponding relationship between the operating point, operating efficiency, and power of the corresponding motor;

[0105] Determining a target motor among the multiple motors and an output power corresponding to the target motor based on the first output power, the second output power, and a power interval corresponding to a target operating range of each of the motors;

[0106] A target operating point of the target motor is determined based on the output power corresponding to the target motor.

[0107] In this embodiment, for any motor among the multiple motors of the motor system, there is a corresponding preset working model, which is used to characterize the corresponding relationship between the working point, working efficiency and power of the corresponding motor.

[0108] The preset operating efficiency range is used to represent the range of acceptable operating efficiency. The preset operating efficiency ranges corresponding to different motors can be the same or different. For any of the multiple motors, the target operating area of ​​the motor and the power range corresponding to the target operating area of ​​the motor can be determined based on the preset operating efficiency range and the preset operating model of the motor. The target operating area may include multiple operating points where the motor meets the preset operating efficiency range, each operating point being determined by the corresponding motor speed and motor torque.

[0109] After determining the power interval corresponding to the target operating range of each motor, a target motor among the multiple motors can be determined based on the first output power, the second output power, and the power interval corresponding to the target operating range of each motor. For example, the sum of the first output power and the second output power can be matched with each power interval in the power interval set, and the motor corresponding to the successfully matched power interval is used as the target motor. The number of target motors can be one or more. If the number of target motors is one, the sum of the first output power and the second output power can be used as the output power corresponding to the target motor; if the number of target motors is multiple, the output power of each target motor can be allocated based on the sum of the first output power and the second output power and the power interval corresponding to the target operating range of each target motor, so that the difference between the sum of the output power of each target motor and the sum of the first output power and the second output power meets a preset threshold, and the output power of each target motor meets the power interval corresponding to its target operating range. Among them, the power interval set can include the power interval corresponding to the target operating range of each motor, and the power interval obtained by summing the power intervals corresponding to the target operating ranges of some or all motors.

[0110] In addition, when the first output power and the second output power are both greater than 0, the first output power and the second output power can also be matched with each power interval in the power interval set respectively to obtain the first target motor corresponding to the first output power and the second target motor corresponding to the second output power, so as to provide electric energy to the first target motor through the first output power, and to provide electric energy to the second motor through the second output power. Among them, the number of the first target motor and the second target motor can be one or more. When the number of the first target motor and the second target motor is one, the output power corresponding to the first target motor is the first output power, and the output power corresponding to the second target motor is the second output power. When the number of the first target motor is multiple, the output power of each first target motor can be allocated based on the first output power and the power interval corresponding to the target working area of ​​each first target motor, so that the difference between the sum of the output power of each first target motor and the first output power meets the preset threshold, and the output power of each first target motor meets the power interval corresponding to its target working area. When there are multiple second target motors, the output power of each second target motor can be allocated based on the second output power and the power range corresponding to the target working area of ​​each second target motor, so that the difference between the sum of the output power of each second target motor and the second output power meets the preset threshold, and the output power of each second target motor meets the power range corresponding to its target working area.

[0111] For any target motor, a target operating point of the target motor can be determined based on the output power corresponding to the target motor. For example, the output power corresponding to the target motor can be matched based on a preset operating model of the target motor to obtain the target operating point of the target motor, and then the target motor can be controlled to operate according to the target operating point of the target motor to provide a first driving power through the output power of each target motor. Therefore, during the operation of the motor system, the output characteristics of each motor can be utilized to intelligently distribute the power output of each motor, effectively ensuring the working efficiency of the motor system while meeting the efficient operation of the target vehicle, and thus effectively meeting environmental protection and energy saving requirements.

[0112] The vehicle energy management device provided by the present invention is described below. The vehicle energy management device described below and the vehicle energy management method described above can be referred to in correspondence with each other. Figure 2 As shown, the vehicle energy management device of the present invention includes at least:

[0113] The first processing module 201 is configured to obtain, when the target vehicle is accelerating or traveling at a constant speed, a current output voltage of the wire network, a current state of charge of a power battery of the target vehicle, and a current required driving power of the target vehicle if the current connection state between the target vehicle and the wire network is connected;

[0114] A second processing module 202 is configured to determine, based on the current output voltage, the current state of charge, and the current required driving power, a first output power of the power battery, a second output power and a third output power of a voltage conversion device of the target vehicle, and a target operating point of the engine of the target vehicle; wherein the voltage conversion device is configured to perform voltage conversion on the electrical energy output by the power grid;

[0115] The third processing module 203 is used to control the motor system to provide a first driving power based on the first output power, the second output power, and a preset working model of each motor in the motor system of the target vehicle, control the engine to provide a second driving power based on the target operating point of the engine, and control the charging of the power battery based on the third output power; wherein, the motor system includes multiple motors.

[0116] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0117] determining a current output power limit of the voltage conversion device based on the current output voltage;

[0118] Based on the current state of charge, the comparison result of the current output voltage and the preset voltage threshold, and the comparison result of the current required driving power and the current output power limit, the first output power, the second output power, the third output power and the target operating point of the engine are determined.

[0119] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0120] If the currently required driving power is less than or equal to the currently output power limit, the operating point corresponding to the engine shutdown state is used as the target operating point of the engine, and the first output power, the second output power, and the third output power are determined based on the currently charged state and the currently required driving power;

[0121] If the current required driving power is greater than the current output power limit, the first output power, the second output power, the third output power and the target operating point of the engine are determined based on the current state of charge and the comparison result of the current output voltage with the preset voltage threshold.

[0122] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0123] If the current state of charge is greater than a first preset state of charge limit, setting the third output power to 0, determining the first output power based on the output power limit of the power battery, and determining the second output power based on the difference between the current required driving power and the first output power, until the current state of charge reaches the second preset state of charge limit;

[0124] If the current state of charge is less than or equal to the second preset state of charge limit, the first output power is set to 0, and the second output power is determined based on the current required driving power, and the third output power is determined based on the difference between the current output power limit and the current required driving power, until the current state of charge reaches the first preset state of charge limit; wherein the second preset state of charge limit is less than the first preset state of charge limit.

[0125] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0126] If the current output voltage is greater than the preset voltage threshold, based on the current state of charge, the first output power, the second output power, the third output power, and the target operating point of the engine are determined in a motor drive priority mode;

[0127] If the current output voltage is less than or equal to the preset voltage threshold, the preset operating point is used as the target operating point of the engine, and the first output power, the second output power and the third output power are determined based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point.

[0128] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0129] If the current state of charge is greater than a third preset state of charge limit, setting the third output power to 0, and determining the first output power, the second output power, and the target operating point of the engine based on the current required driving power;

[0130] If the current state of charge is less than or equal to the third preset state of charge limit, the first output power is set to 0, and the second output power, the third output power and the target operating point of the engine are determined based on the comparison result of the current state of charge and the second preset state of charge limit; wherein the second preset state of charge limit is less than the third preset state of charge limit.

[0131] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0132] If the current state of charge is greater than a second preset state of charge limit, setting the third output power to 0, and determining the first output power and the second output power based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point;

[0133] If the current state of charge is less than or equal to the second preset state of charge limit, the first output power is set to 0, and the second output power and the third output power are determined based on the current output power limit and the difference between the current required driving power and the power corresponding to the preset operating point.

[0134] In an exemplary embodiment, the third processing module 203 is specifically configured to:

[0135] Determining a target operating range for each motor and a power range corresponding to the target operating range based on a preset operating efficiency range and a preset operating model for each motor; wherein the preset operating model is used to characterize the corresponding relationship between the operating point, operating efficiency, and power of the corresponding motor;

[0136] Determining a target motor among the multiple motors and an output power corresponding to the target motor based on the first output power, the second output power, and a power interval corresponding to a target operating range of each of the motors;

[0137] A target operating point of the target motor is determined based on the output power corresponding to the target motor.

[0138] The present invention also provides a vehicle, which adopts the vehicle energy management method as described in any of the above embodiments, or includes the vehicle energy management device as described in any of the above embodiments.

[0139] In this embodiment, the vehicle is a hybrid vehicle such as a hybrid passenger car, a hybrid commercial vehicle, or the like.

[0140] Figure 3 An example of a physical structure diagram of an electronic device is shown below. Figure 3 As shown, the electronic device may include: a processor 301, a communications interface 302, a memory 303, and a communication bus 304, wherein the processor 301, the communications interface 302, and the memory 303 communicate with each other via the communication bus 304. The processor 301 may call the logic instructions in the memory 303 to execute the vehicle energy management method, which includes:

[0141] When the target vehicle is accelerating or traveling at a constant speed, if the current connection state between the target vehicle and the wire network is connected, obtaining the current output voltage of the wire network, the current state of charge of the power battery of the target vehicle, and the current required driving power of the target vehicle;

[0142] Determining, based on the current output voltage, the current state of charge, and the current required driving power, a first output power of the power battery, a second output power and a third output power of the voltage conversion device of the target vehicle, and a target operating point of the engine of the target vehicle; wherein the voltage conversion device is used to perform voltage conversion on the electrical energy output by the power grid;

[0143] Based on the first output power, the second output power, and the preset working model of each motor in the motor system of the target vehicle, the motor system is controlled to provide a first driving power, the engine is controlled to provide a second driving power based on the target operating point of the engine, and the power battery is controlled to be charged based on the third output power; wherein, the motor system includes multiple motors.

[0144] In addition, the logic instructions in the above-mentioned memory 303 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0145] In another aspect, the present invention further provides a computer program product, comprising a computer program stored on a non-transitory computer-readable storage medium, wherein the computer program comprises program instructions. When the program instructions are executed by a computer, the computer is capable of performing the vehicle energy management method provided by the above methods, the method comprising:

[0146] When the target vehicle is accelerating or traveling at a constant speed, if the current connection state between the target vehicle and the wire network is connected, obtaining the current output voltage of the wire network, the current state of charge of the power battery of the target vehicle, and the current required driving power of the target vehicle;

[0147] Determining, based on the current output voltage, the current state of charge, and the current required driving power, a first output power of the power battery, a second output power and a third output power of the voltage conversion device of the target vehicle, and a target operating point of the engine of the target vehicle; wherein the voltage conversion device is used to perform voltage conversion on the electrical energy output by the power grid;

[0148] Based on the first output power, the second output power, and the preset working model of each motor in the motor system of the target vehicle, the motor system is controlled to provide a first driving power, the engine is controlled to provide a second driving power based on the target operating point of the engine, and the power battery is controlled to be charged based on the third output power; wherein, the motor system includes multiple motors.

[0149] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the computer program is implemented to perform the vehicle energy management method provided above, the method comprising:

[0150] When the target vehicle is accelerating or traveling at a constant speed, if the current connection state between the target vehicle and the wire network is connected, obtaining the current output voltage of the wire network, the current state of charge of the power battery of the target vehicle, and the current required driving power of the target vehicle;

[0151] Determining, based on the current output voltage, the current state of charge, and the current required driving power, a first output power of the power battery, a second output power and a third output power of the voltage conversion device of the target vehicle, and a target operating point of the engine of the target vehicle; wherein the voltage conversion device is used to perform voltage conversion on the electrical energy output by the power grid;

[0152] Based on the first output power, the second output power, and the preset working model of each motor in the motor system of the target vehicle, the motor system is controlled to provide a first driving power, the engine is controlled to provide a second driving power based on the target operating point of the engine, and the power battery is controlled to be charged based on the third output power; wherein, the motor system includes multiple motors.

[0153] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0154] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A vehicle energy management method, characterized in that: include: When the target vehicle is accelerating or traveling at a constant speed, if the current connection state between the target vehicle and the wire network is connected, obtaining the current output voltage of the wire network, the current state of charge of the power battery of the target vehicle, and the current required driving power of the target vehicle; determining a current output power limit of the voltage conversion device based on the current output voltage; If the current required driving power is less than or equal to the current output power limit, taking the operating point corresponding to the engine shutdown state as the target operating point of the engine, and determining a first output power, a second output power, and a third output power based on the current state of charge and the current required driving power; If the current required driving power is greater than the current output power limit, the first output power, the second output power, the third output power, and the target operating point of the engine are determined based on the current state of charge and a comparison result of the current output voltage with a preset voltage threshold; wherein the voltage conversion device is used to perform voltage conversion on the electrical energy output by the power grid; Based on the first output power, the second output power, and the preset working model of each motor in the motor system of the target vehicle, the motor system is controlled to provide a first driving power, the engine is controlled to provide a second driving power based on the target operating point of the engine, and the power battery is controlled to be charged based on the third output power; wherein, the motor system includes multiple motors.

2. The vehicle energy management method according to claim 1, characterized in that: The determining the first output power, the second output power, and the third output power based on the current state of charge and the current required driving power includes: If the current state of charge is greater than a first preset state of charge limit, setting the third output power to 0, determining the first output power based on the output power limit of the power battery, and determining the second output power based on the difference between the current required driving power and the first output power, until the current state of charge reaches the second preset state of charge limit; If the current state of charge is less than or equal to the second preset state of charge limit, the first output power is set to 0, and the second output power is determined based on the current required driving power, and the third output power is determined based on the difference between the current output power limit and the current required driving power, until the current state of charge reaches the first preset state of charge limit; wherein the second preset state of charge limit is less than the first preset state of charge limit.

3. The vehicle energy management method according to claim 1, characterized in that: The determining, based on the current state of charge and a comparison result of the current output voltage with the preset voltage threshold, the first output power, the second output power, the third output power, and the target operating point of the engine includes: If the current output voltage is greater than the preset voltage threshold, based on the current state of charge, the first output power, the second output power, the third output power, and the target operating point of the engine are determined in a motor drive priority mode; If the current output voltage is less than or equal to the preset voltage threshold, the preset operating point is used as the target operating point of the engine, and the first output power, the second output power and the third output power are determined based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point.

4. The vehicle energy management method according to claim 3, characterized in that: The determining, based on the current state of charge, the first output power, the second output power, the third output power, and the target operating point of the engine in a motor drive priority mode includes: If the current state of charge is greater than a third preset state of charge limit, setting the third output power to 0, and determining the first output power, the second output power, and the target operating point of the engine based on the current required driving power; If the current state of charge is less than or equal to the third preset state of charge limit, the first output power is set to 0, and the second output power, the third output power and the target operating point of the engine are determined based on the comparison result of the current state of charge and the second preset state of charge limit; wherein the second preset state of charge limit is less than the third preset state of charge limit.

5. The vehicle energy management method according to claim 3, characterized in that: The determining the first output power, the second output power, and the third output power based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point includes: If the current state of charge is greater than a second preset state of charge limit, setting the third output power to 0, and determining the first output power and the second output power based on the current state of charge and the difference between the current required driving power and the power corresponding to the preset operating point; If the current state of charge is less than or equal to the second preset state of charge limit, the first output power is set to 0, and the second output power and the third output power are determined based on the current output power limit and the difference between the current required driving power and the power corresponding to the preset operating point.

6. The vehicle energy management method according to any one of claims 1 to 5, characterized in that: The controlling the motor system to provide a first driving power based on the first output power, the second output power, and a preset operating model of each motor in the motor system of the target vehicle includes: Determining a target operating range for each motor and a power range corresponding to the target operating range based on a preset operating efficiency range and a preset operating model for each motor; wherein the preset operating model is used to characterize the corresponding relationship between the operating point, operating efficiency, and power of the corresponding motor; Determining a target motor among the multiple motors and an output power corresponding to the target motor based on the first output power, the second output power, and a power interval corresponding to a target operating range of each of the motors; A target operating point of the target motor is determined based on the output power corresponding to the target motor.

7. A vehicle energy management device, characterized in that: include: A first processing module is configured to obtain, when the target vehicle is accelerating or traveling at a constant speed, a current output voltage of the wire network, a current state of charge of a power battery of the target vehicle, and a current required driving power of the target vehicle if the current connection state between the target vehicle and the wire network is connected; A second processing module is configured to determine a current output power limit of the voltage conversion device based on the current output voltage; If the current required driving power is less than or equal to the current output power limit, taking the operating point corresponding to the engine shutdown state as the target operating point of the engine, and determining a first output power, a second output power, and a third output power based on the current state of charge and the current required driving power; If the current required driving power is greater than the current output power limit, the first output power, the second output power, the third output power, and the target operating point of the engine are determined based on the current state of charge and a comparison result of the current output voltage with a preset voltage threshold; wherein the voltage conversion device is used to perform voltage conversion on the electrical energy output by the power grid; a third processing module, configured to control the motor system to provide a first driving power based on the first output power, the second output power, and a preset operating model of each motor in the motor system of the target vehicle, control the engine to provide a second driving power based on a target operating point of the engine, and control charging of the power battery based on the third output power; wherein the motor system includes multiple motors.

8. A vehicle, characterized in that: The vehicle adopts the vehicle energy management method according to any one of claims 1 to 6, or includes the vehicle energy management device according to claim 7.

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