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: obtaining the current connection status of the target vehicle and the power network, the current state of charge of the target vehicle's power battery, the current speed of the target vehicle, and the current required driving power of the target vehicle while the target vehicle is accelerating or traveling at a constant speed; if the current connection status is connected, based on the current state of charge, current speed, and current required driving power, controlling one or more of the target vehicle's voltage conversion device, power battery, and engine to provide driving power to the target vehicle, or controlling the engine and / or voltage conversion device to provide driving power to the target vehicle and controlling the voltage conversion device to provide charging power to the target vehicle. 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, making it difficult to effectively meet environmental protection and energy-saving requirements while ensuring efficient vehicle operation. 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, obtaining the current connection status between the target vehicle and the network, the current state of charge of the power battery of the target vehicle, the current speed of the target vehicle, and the current required driving power of the target vehicle;

[0007] If the current connection state is connected, based on the current state of charge, the current vehicle speed and the current required driving power, one or more of the voltage conversion device, power battery and engine of the target vehicle are controlled to provide driving power for the target vehicle, or the engine and / or the voltage conversion device are controlled to provide the driving power for the target vehicle and the voltage conversion device is controlled to provide charging power for the target vehicle; wherein the voltage conversion device is used to provide the driving power and / or the charging power after voltage conversion of the electric energy output by the line network.

[0008] According to the vehicle energy management method provided by the present invention, the controlling one or more of the voltage conversion device, the power battery, and the engine of the target vehicle to provide driving power for the target vehicle based on the current state of charge, the current vehicle speed, and the current required driving power includes:

[0009] When it is determined that the power battery does not meet the charging conditions based on the comparison result of the currently required driving power and the output power limit of the voltage conversion device and the current state of charge, one or more of the voltage conversion device, the power battery and the engine are controlled to provide the driving power based on the current state of charge, the current vehicle speed and the currently required driving power.

[0010] According to the vehicle energy management method provided by the present invention, the controlling one or more of the voltage conversion device, the power battery, and the engine to provide the driving power based on the current state of charge, the current vehicle speed, and the current required driving power includes:

[0011] If the current vehicle speed is less than or equal to a first preset vehicle speed, controlling the power battery and / or the voltage conversion device to provide the driving power based on the current state of charge and a comparison result of the current required driving power with the output power limit of the voltage conversion device;

[0012] If the current vehicle speed is greater than the first preset vehicle speed, the engine and / or the voltage conversion device is controlled to provide the driving power based on a comparison result of the current required driving power and the output power limit of the voltage conversion device.

[0013] According to the vehicle energy management method provided by the present invention, controlling the power battery and / or the voltage conversion device to provide the driving power based on the current state of charge and the comparison result of the current required driving power with the output power limit of the voltage conversion device includes:

[0014] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, based on a comparison result of the current state of charge and a first preset state of charge limit, controlling the power battery and / or the voltage conversion device to provide the driving power;

[0015] If the currently required driving power is greater than the output power limit of the voltage conversion device, the voltage conversion device is controlled to provide the driving power based on the output power limit of the voltage conversion device, and the output power of the power battery is controlled 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 first preset state of charge limit.

[0016] According to the vehicle energy management method provided by the present invention, controlling the power battery and / or the voltage conversion device to provide the driving power based on the comparison result of the current state of charge and the first preset state of charge limit value includes:

[0017] If the current state of charge is greater than or equal to the first preset state of charge limit, controlling the power battery to provide the driving power based on the current required driving power or the output power limit of the power battery, and controlling the output power of the voltage conversion device based on a comparison result of the output power limit of the power battery and the current required driving power;

[0018] If the current state of charge is less than the first preset state of charge limit, the voltage conversion device is controlled to provide the driving power.

[0019] According to the vehicle energy management method provided by the present invention, controlling the engine and / or the voltage conversion device to provide the driving power based on a comparison result of the currently required driving power and the output power limit of the voltage conversion device includes:

[0020] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, controlling the voltage conversion device to provide the driving power;

[0021] If the currently required driving power is greater than the output power limit of the voltage conversion device, based on the comparison result between the current vehicle speed and the second preset vehicle speed, the engine is controlled to provide the driving power, or the engine and the voltage conversion device are controlled to provide the driving power; wherein, the second preset vehicle speed is greater than the first preset vehicle speed.

[0022] According to the vehicle energy management method provided by the present invention, the controlling the engine to provide the driving power, or controlling the engine and the voltage conversion device to provide the driving power based on the comparison result between the current vehicle speed and the second preset vehicle speed, includes:

[0023] If the current vehicle speed is less than or equal to the second preset vehicle speed, controlling the voltage conversion device to provide the driving power based on the output power limit of the voltage conversion device, and controlling the engine to provide the driving power based on the difference between the current required driving power and the output power limit of the voltage conversion device;

[0024] If the current vehicle speed is greater than the second preset vehicle speed, the target operating point of the engine is determined based on the preset operating curve of the engine, and the engine is controlled to provide the driving power based on the target operating point, and the output power of the voltage conversion device is controlled based on the comparison result of the current required driving power and the power corresponding to the target operating point.

[0025] According to the vehicle energy management method provided by the present invention, based on the current state of charge, the current vehicle speed, and the current required driving power, controlling the engine and / or the voltage conversion device to provide the driving power for the target vehicle and controlling the voltage conversion device to provide charging power for the target vehicle include:

[0026] Based on the comparison result of the currently required driving power and the output power limit of the voltage conversion device and the current state of charge, when it is determined that the power battery meets the charging conditions, the engine and / or the voltage conversion device are controlled to provide the driving power and the voltage conversion device is controlled to provide the charging power based on the current state of charge and the currently required driving power.

[0027] According to the vehicle energy management method provided by the present invention, the controlling the engine and / or the voltage conversion device to provide the driving power and the controlling the voltage conversion device to provide the charging power based on the current state of charge and the current required driving power includes:

[0028] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, controlling the voltage conversion device to provide the driving power based on the currently required driving power, and controlling the voltage conversion device to provide the charging power based on the difference between the output power limit of the voltage conversion device and the currently required driving power until the current state of charge reaches a first preset state of charge limit;

[0029] If the currently required driving power is greater than the output power limit of the voltage conversion device, the engine is controlled to provide the driving power based on the currently required driving power, and the voltage conversion device is controlled to provide the charging power based on the output power limit of the voltage conversion device until the current state of charge reaches the first preset state of charge limit.

[0030] The present invention also provides a vehicle energy management device, comprising:

[0031] A first processing module is configured to obtain, when the target vehicle is accelerating or traveling at a constant speed, a current connection status between the target vehicle and the wired network, a current state of charge of a power battery of the target vehicle, a current speed of the target vehicle, and a current required driving power of the target vehicle;

[0032] The second processing module is used to control one or more of the voltage conversion device, power battery and engine of the target vehicle to provide driving power for the target vehicle, or to control the engine and / or the voltage conversion device to provide the driving power for the target vehicle and control the voltage conversion device to provide charging power for the target vehicle if the current connection state is connected, based on the current charge state, the current vehicle speed and the current required driving power; wherein, the voltage conversion device is used to provide the driving power and / or the charging power after voltage conversion of the electric energy output by the line network.

[0033] 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.

[0034] The vehicle energy management method, device and vehicle provided by the present invention obtain the current connection status of the target vehicle and the network, the current charge status of the power battery of the target vehicle, the current speed of the target vehicle and the current required driving power of the target vehicle when the target vehicle is accelerating or traveling at a constant speed. When the current connection status of the target vehicle and the network is connected, based on the current charge status, current speed and current required driving power, one or more of the voltage conversion device, power battery and engine of the target vehicle are controlled to provide driving power for the target vehicle, or the engine and / or voltage conversion device are controlled to provide driving power for the target vehicle and the voltage conversion device is controlled to provide charging power for the target vehicle. This can effectively meet the requirements of environmental protection and energy saving while ensuring the efficient operation of the target vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] Figure 1 It is a flow chart of the vehicle energy management method provided by the present invention;

[0037] Figure 2 It is a structural schematic diagram of the vehicle energy management device provided by the present invention;

[0038] Figure 3 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0039] 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.

[0040] 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:

[0041] S101. While a target vehicle is accelerating or traveling at a constant speed, obtaining a current connection status between the target vehicle and the network, a current state of charge of a power battery of the target vehicle, a current speed of the target vehicle, and a current required driving power of the target vehicle;

[0042] S102. If the current connection state is connected, based on the current state of charge, the current vehicle speed and the current required driving power, control one or more of the voltage conversion device, power battery and engine of the target vehicle to provide driving power for the target vehicle, or control the engine and / or the voltage conversion device to provide the driving power for the target vehicle and control the voltage conversion device to provide charging power for the target vehicle; wherein the voltage conversion device is used to provide the driving power and / or the charging power after voltage conversion of the electric energy output by the line network.

[0043] 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 current connection status between the target vehicle and the network, which can include connected and disconnected. The current state of charge of the power battery is the current state of charge of the power battery. The current speed of the target vehicle is the current speed of the target vehicle.

[0044] When detecting that the target vehicle is accelerating or traveling at a constant speed, the current connection status of the target vehicle and the network, the current charge status of the power battery, and the current speed of the target vehicle can be obtained in real time. At the same time, the current required driving power of the target vehicle can be obtained in real time based on the driver's driving intention. For example, the current required driving power of the target vehicle can be obtained based on the inclination angle of the accelerator pedal, the gear setting, etc.

[0045] 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 and the power grid are currently connected, the voltage conversion device can convert the power output from the power grid into a voltage before outputting it to the power management device. This effectively reduces the risk of the target vehicle's inability to operate normally due to insufficient energy during operation. Furthermore, the voltage conversion device effectively ensures the stability of the power provided by the power grid to the power management device, achieving voltage clamping protection for the target vehicle's electrical equipment.

[0046] The power management device can also be connected to the power battery, motor 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 and high-voltage electrical equipment 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 failing to operate normally due to insufficient energy during operation of the target vehicle can be effectively reduced.

[0047] The engine is used to convert the energy provided by the fuel into mechanical energy, thereby providing driving power for the target vehicle through the mechanical energy provided by the engine. For example, the engine can be a fuel engine, an LNG (Liquefied Natural Gas) engine, a CNG (Compressed Natural Gas) engine, a hydrogen engine, a methanol engine, etc. It is understood that the mechanical energy provided by the engine can also be used to drive a generator to provide electrical energy to charge the power battery.

[0048] In actual applications, when the target vehicle is accelerating or traveling at a constant speed, if the current connection status of the target vehicle and the network is connected, one or more of the voltage conversion device, power battery and engine of the target vehicle can be controlled to provide driving power for the target vehicle based on the current state of charge, current vehicle speed and current required driving power, so as to drive the target vehicle to operate normally, or the engine and / or voltage conversion device can be controlled to provide driving power for the target vehicle and the voltage conversion device can be controlled to provide charging power for the target vehicle, so as to drive the target vehicle to operate normally and charge the power battery through the charging power, thereby effectively meeting the requirements of environmental protection and energy saving while ensuring the efficient operation of the target vehicle.

[0049] For example, when the power battery does not meet the charging conditions, one or more of the voltage conversion device, the power battery and the engine can be controlled to provide driving power for the target vehicle based on the current vehicle speed, the current state of charge and the comparison result of the current required driving power with the output power limit of the voltage conversion device; when the power battery meets the charging conditions, the power battery is controlled not to output power, and at the same time, based on the current state of charge and the comparison result of the current required driving power with the output power limit of the voltage conversion device, the engine and / or the voltage conversion device are controlled to provide driving power for the target vehicle and the voltage conversion device is controlled to provide charging power for the target vehicle. Therefore, when the target vehicle is connected to the power network, the driving power of the voltage conversion device, the power battery and the engine are distributed and the power battery is charged by combining multiple different factors. This can ensure the efficient operation of the target vehicle while making full use of the electric energy provided by the power network to provide driving power and / or charging power for the target vehicle, thereby effectively meeting the requirements of environmental protection and energy saving, and at the same time, improving the cruising range of the target vehicle.

[0050] In addition, when the target vehicle is accelerating or traveling at a constant speed, if the current connection state between the target vehicle and the power network is disconnected, the power battery and / or the engine can be controlled to provide driving power to the target vehicle based on one or more of the current vehicle speed, the current state of charge of the power battery, and the current required driving power, so as to meet the requirements of environmental protection and energy saving to the greatest extent while meeting the normal operation of the target vehicle. For example, when the current state of charge is greater than a second preset state of charge limit, if the current vehicle speed is less than or equal to a first preset speed, the power battery can be controlled to provide driving power to the target vehicle based on the current required driving power; if the current vehicle speed is greater than the first preset speed and less than or equal to the second preset speed, the engine can be controlled to provide driving power to the target vehicle based on the current required driving power; if the current vehicle speed is greater than the second preset speed, the power battery and the engine can be controlled to provide driving power together based on the current required driving power; if the current state of charge is less than or equal to the second preset state of charge limit, the engine can be controlled to provide driving power to the target vehicle; wherein the second preset speed is greater than the first preset speed.

[0051] It is understood that if the current SOC is less than the third preset SOC limit, the engine may be controlled to simultaneously provide driving power and charging power to the target vehicle until the current SOC of the power battery reaches the first preset SOC limit, thereby adapting to different operating conditions. The third preset SOC limit is less than the second preset SOC limit, and the second preset SOC limit is less than the first preset SOC limit. For example, the third preset SOC limit may be used to represent the lower limit of the power battery's usable range, the second preset SOC limit may be used to represent the lower limit at which the power battery satisfies the conditions for providing driving power, and the first preset SOC limit may be used to represent the upper limit of the power battery's charging capacity.

[0052] As an optional embodiment, when the target vehicle is decelerating and / or traveling downhill, the power management device may also capture braking energy and, based on the current connection status between the target vehicle and the power grid and the current state of charge of the power battery, control the power management device to feed back braking energy 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 back braking energy to the power battery. That is, when the current state of charge is less than the first preset state of charge limit, braking energy is fed back to the power battery regardless of whether the current connection state is connected or disconnected. If the current state of charge is greater than or equal to the first preset state of charge limit and the current connection state is connected, the power management device may be controlled to feed back braking energy 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, thereby achieving multi-path feedback of braking energy and efficiently recovering braking energy while ensuring the reliability of electric braking.

[0053] 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.

[0054] 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 or equal to 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.

[0055] As another optional embodiment, when the target vehicle is stationary, the voltage conversion device or the engine can be controlled to provide charging power to the target vehicle based on the current connection status between 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 second preset state of charge limit, the target vehicle can be provided with charging power based on the 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 second preset state of charge limit, the power connection status of the target vehicle's on-board charging device is obtained, and if the power connection status is connected, the on-board charging device is controlled to provide charging power to the target vehicle; if the current connection status and the power connection status are both disconnected, and the current state of charge of the power battery is less than a third preset state of charge limit, the engine can be controlled to provide charging power to the target vehicle, that is, the engine is forced to start to charge the power battery, thereby effectively avoiding the impact of power battery power feeding on the normal operation of the target vehicle.

[0056] This embodiment obtains the current connection status of the target vehicle and the network, the current charge status of the power battery of the target vehicle, the current speed of the target vehicle and the current required driving power of the target vehicle when the target vehicle is in the process of accelerating or traveling at a constant speed, and when the current connection status of the target vehicle and the network is connected, based on the current charge status, current speed and current required driving power, controls one or more of the voltage conversion device, power battery and engine of the target vehicle to provide driving power for the target vehicle, or controls the engine and / or voltage conversion device to provide driving power for the target vehicle and controls the voltage conversion device to provide charging power for the target vehicle, thereby ensuring the efficient operation of the target vehicle while effectively meeting the requirements of environmental protection and energy saving.

[0057] In an exemplary embodiment, controlling one or more of a voltage conversion device, a power battery, and an engine of the target vehicle to provide driving power to the target vehicle based on the current state of charge, the current vehicle speed, and the current required driving power includes:

[0058] When it is determined that the power battery does not meet the charging conditions based on the comparison result of the currently required driving power and the output power limit of the voltage conversion device and the current state of charge, one or more of the voltage conversion device, the power battery and the engine are controlled to provide the driving power based on the current state of charge, the current vehicle speed and the currently required driving power.

[0059] In this embodiment, 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 connected, it is possible to determine whether the power battery meets the charging conditions based on the comparison result of the current required driving power and the output power limit of the voltage conversion device, as well as the current charge state of the power battery.

[0060] For example, when the currently required driving power is greater than the output power limit of the voltage conversion device, if the current state of charge is less than the third preset state of charge limit, it is determined that the power battery meets the charging conditions; if the current state of charge is greater than or equal to the third preset state of charge limit, it is determined that the power battery does not meet the charging conditions; when the currently required driving power is less than or equal to the output power limit of the voltage conversion device, if the current state of charge is less than the second preset state of charge limit, it is determined that the power battery meets the charging conditions; if the current state of charge is greater than or equal to the second preset state of charge limit, it is determined that the power battery does not meet the charging conditions; wherein, the third preset state of charge limit can be less than the second preset state of charge limit, so that the charging conditions of the power battery can be changed in real time according to the power demand of the target vehicle, thereby effectively improving the cruising range of the target vehicle while meeting the efficient operation of the target vehicle.

[0061] If the current required driving power is greater than the output power limit of the voltage conversion device, indicating that the power grid alone cannot meet the target vehicle's required driving power, the system can determine that the power battery meets the charging conditions when the current state of charge is less than a third preset state of charge limit, and control the power grid to prioritize providing driving power to the target vehicle to ensure efficient operation of the target vehicle. If the current required driving power is less than or equal to the output power limit of the voltage conversion device, indicating that the power grid alone can meet the target vehicle's required driving power, the system can determine that the power battery meets the charging conditions when the current state of charge is less than a second preset state of charge limit, and control the power grid to use excess power to charge the power battery. This allows the target vehicle's driving needs to be met while charging the power battery, thereby increasing its range.

[0062] If the power battery does not meet the charging conditions, there is no need to provide charging power to the target vehicle. Instead, the voltage conversion device, the power battery, and the engine may be controlled to provide driving power based on the current state of charge, the current vehicle speed, and the current required driving power. For example, the voltage conversion device, the power battery, or the engine may be controlled to provide driving power individually, the power battery and the voltage conversion device may be controlled to provide driving power together, or the engine and the voltage conversion device may be controlled to provide driving power together. As an optional embodiment, when the current vehicle speed is less than or equal to a first preset speed, the power battery and / or the voltage conversion device may be controlled to provide driving power based on the current state of charge and the current required driving power. When the current vehicle speed is greater than the first preset speed, the engine and / or the voltage conversion device may be controlled to provide driving power based on the current required driving power. This ensures efficient operation of the target vehicle while effectively improving the target vehicle's range.

[0063] In an exemplary embodiment, controlling one or more of the voltage conversion device, the power battery, and the engine to provide the driving power based on the current state of charge, the current vehicle speed, and the current required driving power includes:

[0064] If the current vehicle speed is less than or equal to a first preset vehicle speed, controlling the power battery and / or the voltage conversion device to provide the driving power based on the current state of charge and a comparison result of the current required driving power with the output power limit of the voltage conversion device;

[0065] If the current vehicle speed is greater than the first preset vehicle speed, the engine and / or the voltage conversion device is controlled to provide the driving power based on a comparison result of the current required driving power and the output power limit of the voltage conversion device.

[0066] In this embodiment, when the power battery does not meet the charging conditions, one or more of the voltage conversion device, the power battery and the engine can be controlled to provide driving power for the target vehicle based on the current vehicle speed range, the comparison result of the current required driving power and the output power limit of the voltage conversion device and the current state of charge.

[0067] In actual applications, if the current vehicle speed is less than or equal to the first preset vehicle speed, the power battery and / or voltage conversion device can be controlled to provide driving power based on the comparison result of the current required driving power and the output power limit of the voltage conversion device and the current state of charge. That is, when the target vehicle starts or runs at low speed, a pure electric driving mode is adopted, thereby further meeting the requirements of environmental protection and energy saving.

[0068] If the current vehicle speed is greater than the first preset speed, the engine and / or the voltage conversion device can be controlled to provide driving power based on the comparison result of the current required driving power and the output power limit of the voltage conversion device. That is, when the target vehicle is running at high speed, the driving power is provided by the engine and / or the voltage conversion device to ensure the efficient operation of the target vehicle and effectively improve the cruising range of the target vehicle.

[0069] In an exemplary embodiment, controlling the power battery and / or the voltage conversion device to provide the driving power based on the current state of charge and a comparison result of the current required driving power with the output power limit of the voltage conversion device includes:

[0070] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, based on a comparison result of the current state of charge and a first preset state of charge limit, controlling the power battery and / or the voltage conversion device to provide the driving power;

[0071] If the currently required driving power is greater than the output power limit of the voltage conversion device, the voltage conversion device is controlled to provide the driving power based on the output power limit of the voltage conversion device, and the output power of the power battery is controlled 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 first preset state of charge limit.

[0072] In this embodiment, when the current vehicle speed is less than or equal to the first preset vehicle speed, the power battery and / or the voltage conversion device can be controlled to provide driving power based on the comparison result of the current required driving power and the output power limit of the voltage conversion device, or the power battery and / or the voltage conversion device can be controlled to provide driving power based on the comparison result of the current required driving power and the output power limit of the voltage conversion device and the current state of charge.

[0073] In practical applications, if the current required driving power is less than or equal to the output power limit of the voltage conversion device, the power battery and / or the voltage conversion device can be further controlled to provide driving power based on the comparison result of the current state of charge with the first preset state of charge limit. For example, when the current state of charge is greater than or equal to the first preset state of charge limit, the power battery can be prioritized to provide driving power, reserving space for brake energy regenerative braking. If the current state of charge is less than the first preset state of charge limit, the voltage conversion device can be controlled to provide driving power, and the power battery can be disabled to output power, so that the power grid can be prioritized to provide driving power to the target vehicle, thereby improving the target vehicle's range.

[0074] If the current required driving power exceeds the output power limit of the voltage conversion device, the voltage conversion device can be controlled to provide driving power based on the output power limit of the voltage conversion device, thereby prioritizing the use of the power grid to provide driving power to the target vehicle and improving the target vehicle's range. Furthermore, the power battery's output power can be controlled based on a comparison between the power battery's current state of charge and a second preset state of charge limit. For example, if the power battery's current state of charge exceeds the second preset state of charge limit, the power battery can be controlled to provide driving power based on the difference between the current required driving power and the output power limit of the voltage conversion device. If the power battery's current state of charge is less than or equal to the second preset state of charge limit, the power battery can be controlled to cease power output. Simultaneously, the target vehicle can be controlled to operate at reduced power. This ensures the target vehicle's normal operation to the greatest extent possible while meeting environmental and energy-saving requirements during starting or low-speed operation.

[0075] In an exemplary embodiment, controlling the power battery and / or the voltage conversion device to provide the driving power based on a comparison result of the current state of charge with a first preset state of charge limit value includes:

[0076] If the current state of charge is greater than or equal to the first preset state of charge limit, controlling the power battery to provide the driving power based on the current required driving power or the output power limit of the power battery, and controlling the output power of the voltage conversion device based on a comparison result of the output power limit of the power battery and the current required driving power;

[0077] If the current state of charge is less than the first preset state of charge limit, the voltage conversion device is controlled to provide the driving power.

[0078] In this embodiment, when the current required driving power is less than or equal to the output power limit of the voltage conversion device, during the process of controlling the power battery and / or the voltage conversion device to provide driving power based on the comparison result of the current state of charge with the first preset state of charge limit, if the current state of charge is greater than or equal to the first preset state of charge limit, indicating that there is no energy storage space in the power battery, the power battery may be controlled to provide driving power based on the current required driving power or the output power limit of the power battery, thereby prioritizing the power battery in providing driving power, reserving space for brake energy feedback, and further improving the reliability of electric braking. For example, when the current required driving power is less than or equal to the output power limit of the power battery, the power battery is controlled to provide driving power based on the current required driving power, and the output power of the voltage conversion device is zero. When the current required driving power is greater than the output power limit of the power battery, the power battery is controlled to provide driving power based on the output power limit of the power battery, and the voltage conversion device is controlled to provide driving power based on the difference between the current required driving power and the output power limit of the power battery, thereby effectively ensuring the normal operation of the target vehicle.

[0079] If the current state of charge is less than the first preset state of charge limit, it indicates that there is energy storage space in the power battery and the conditions for providing driving power are met. At this time, the voltage conversion device can be controlled to provide driving power. At the same time, the power battery is controlled not to output power, thereby effectively improving the cruising range of the target vehicle while ensuring the normal operation of the target vehicle. The power battery has braking energy feedback space, which further improves the reliability of electric braking.

[0080] In an exemplary embodiment, controlling the engine and / or the voltage conversion device to provide the driving power based on a comparison result of the currently required driving power and an output power limit of the voltage conversion device includes:

[0081] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, controlling the voltage conversion device to provide the driving power;

[0082] If the currently required driving power is greater than the output power limit of the voltage conversion device, based on the comparison result between the current vehicle speed and the second preset vehicle speed, the engine is controlled to provide the driving power, or the engine and the voltage conversion device are controlled to provide the driving power; wherein, the second preset vehicle speed is greater than the first preset vehicle speed.

[0083] In this embodiment, when the power battery does not meet the charging conditions and the current vehicle speed is greater than the first preset vehicle speed, based on the comparison result of the current required driving power and the output power limit of the voltage conversion device, the engine or the voltage conversion device can be controlled to provide driving power alone, or the engine and the voltage conversion device can be controlled to provide driving power together.

[0084] For example, if the currently required driving power is less than or equal to the output power limit of the voltage conversion device, the voltage conversion device can be controlled to provide driving power alone, so as to ensure the efficient operation of the target vehicle while effectively meeting environmental protection and energy-saving requirements and improving the cruising range of the target vehicle.

[0085] If the current required driving power exceeds the output power limit of the voltage conversion device, the current vehicle speed may be further compared with a second preset speed. Based on the comparison result, the engine may be controlled to provide driving power alone, or the engine and the voltage conversion device may be controlled to provide driving power together. For example, when the current vehicle speed is less than or equal to the second preset speed, the voltage conversion device may be prioritized for providing driving power, while when the current vehicle speed is greater than the second preset speed, the engine may be prioritized for providing driving power. This ensures efficient operation of the target vehicle while effectively meeting environmental protection and energy conservation requirements.

[0086] In an exemplary embodiment, the controlling the engine to provide the driving power, or controlling the engine and the voltage conversion device to provide the driving power based on the comparison result between the current vehicle speed and the second preset vehicle speed, includes:

[0087] If the current vehicle speed is less than or equal to the second preset vehicle speed, controlling the voltage conversion device to provide the driving power based on the output power limit of the voltage conversion device, and controlling the engine to provide the driving power based on the difference between the current required driving power and the output power limit of the voltage conversion device;

[0088] If the current vehicle speed is greater than the second preset vehicle speed, the current target operating point of the engine is determined based on the preset operating curve of the engine and the current vehicle speed, and the engine is controlled to provide the driving power based on the current target operating point, and the output power of the voltage conversion device is controlled based on the comparison result of the current required driving power and the power corresponding to the current target operating point.

[0089] In this embodiment, when the currently required driving power is greater than the output power limit of the voltage conversion device, if the current vehicle speed is less than or equal to the second preset vehicle speed, the voltage conversion device can be controlled to provide driving power based on the output power limit of the voltage conversion device. At the same time, the engine can be controlled to provide driving power based on the difference between the currently required driving power and the output power limit of the voltage conversion device, so as to prioritize controlling the voltage conversion device to provide driving power. This can effectively meet environmental protection and energy-saving requirements while ensuring the efficient operation of the target vehicle, and improve the cruising range of the target vehicle.

[0090] If the current vehicle speed is greater than the second preset vehicle speed, the target operating point of the engine can be determined based on the preset operating curve of the engine, and the engine can be controlled to provide driving power based on the target operating point of the engine. At the same time, based on the comparison result of the current required driving power and the power corresponding to the target operating point, the output power of the voltage conversion device is controlled to give priority to controlling the engine to provide driving power. For example, if the current required driving power is greater than the power corresponding to the target operating point, the voltage conversion device is controlled to provide driving power based on the difference between the current required driving power and the power corresponding to the target operating point. If the current required driving power is less than or equal to the power corresponding to the target operating point, the output power of the voltage conversion device is 0, that is, the driving power can be provided by the engine alone, so as to ensure the efficient operation of the target vehicle while making the engine operate in the optimal working mode, thereby effectively improving the working efficiency of the engine.

[0091] The preset operating curve of the engine is used to characterize the corresponding relationship between engine speed, engine torque, engine output power, and engine fuel consumption rate. For example, it can be the engine's external characteristic curve. The target operating point can be the engine speed and engine torque corresponding to the lowest engine fuel consumption rate, and the power corresponding to the target operating point can be the engine output power corresponding to the lowest engine fuel consumption rate. The engine operation can be controlled based on the engine speed and engine torque at the target operating point to provide driving power for the target vehicle. In the engine's external characteristic curve, the engine fuel consumption rate is typically a concave curve that increases with increasing engine speed.

[0092] In an exemplary embodiment, the controlling the engine and / or the voltage conversion device to provide the driving power to the target vehicle and the controlling the voltage conversion device to provide the charging power to the target vehicle based on the current state of charge, the current vehicle speed, and the current required driving power includes:

[0093] Based on the comparison result of the currently required driving power and the output power limit of the voltage conversion device and the current state of charge, when it is determined that the power battery meets the charging conditions, the engine and / or the voltage conversion device are controlled to provide the driving power and the voltage conversion device is controlled to provide the charging power based on the current state of charge and the currently required driving power.

[0094] In this embodiment, it can be determined that the power battery meets the charging conditions when the currently required driving power is greater than the output power limit of the voltage conversion device and the current state of charge is less than the third preset state of charge limit; it can also be determined that the power battery meets the charging conditions when the currently required driving power is less than or equal to the output power limit of the voltage conversion device and the current state of charge is less than the second preset state of charge limit.

[0095] If the power battery meets the charging conditions, it is necessary to provide charging power to the target vehicle while providing driving power to the target vehicle, so as to charge the power battery through the charging power and ensure the cruising range of the target vehicle. At the same time, when the power battery meets the charging conditions, the power battery can be controlled not to output power, and based on the current state of charge and the current required driving power, the engine and / or the voltage conversion device can be controlled to provide driving power and the voltage conversion device can be controlled to provide charging power. For example, the engine can be controlled to provide driving power and the voltage conversion device can be controlled to provide charging power, the voltage conversion device can be controlled to provide driving power and charging power at the same time, and the engine and the voltage conversion device can be controlled to provide driving power together and the voltage conversion device can be controlled to provide charging power, thereby effectively improving the cruising range of the target vehicle while ensuring the efficient operation of the target vehicle.

[0096] In an exemplary embodiment, based on the current state of charge and the current required driving power, controlling the engine and / or the voltage conversion device to provide the driving power and controlling the voltage conversion device to provide the charging power include:

[0097] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, controlling the voltage conversion device to provide the driving power based on the currently required driving power, and controlling the voltage conversion device to provide the charging power based on the difference between the output power limit of the voltage conversion device and the currently required driving power until the current state of charge reaches a first preset state of charge limit;

[0098] If the currently required driving power is greater than the output power limit of the voltage conversion device, the engine is controlled to provide the driving power based on the currently required driving power, and the voltage conversion device is controlled to provide the charging power based on the output power limit of the voltage conversion device until the current state of charge reaches the first preset state of charge limit.

[0099] In this embodiment, when the power battery meets the charging conditions, the engine and / or voltage conversion device can be controlled to provide driving power based on the current state of charge and the comparison result of the current required driving power and the output power limit of the voltage conversion device. At the same time, the voltage conversion device is controlled to provide charging power, so as to effectively improve the cruising range of the target vehicle while ensuring the normal operation of the target vehicle.

[0100] In actual applications, if the currently required driving power is less than or equal to the output power limit of the voltage conversion device, the voltage conversion device can be controlled to provide driving power based on the currently required driving power. At the same time, based on the difference between the output power limit of the voltage conversion device and the currently required driving power, the voltage conversion device is controlled to provide charging power. That is, driving power and charging power are provided simultaneously through the line network to charge the power battery while meeting the driving needs of the target vehicle, thereby maximizing the utilization of the line network energy, thereby effectively meeting environmental protection and energy-saving requirements, and improving the cruising range of the target vehicle.

[0101] If the currently required driving power is greater than the output power limit of the voltage conversion device, the engine can be controlled to provide driving power based on the currently required driving power. At the same time, the voltage conversion device is controlled to provide charging power based on the output power limit of the voltage conversion device. That is, the voltage conversion device is controlled based on the power battery charging priority strategy, thereby maximizing the utilization of the line network energy and effectively improving the cruising range of the target vehicle.

[0102] It can be understood that in the process of controlling the voltage conversion device to provide charging power, the current state of charge of the power battery can also be monitored in real time. If the current state of charge of the power battery reaches a first preset state of charge limit, the voltage conversion device is controlled to stop providing charging power, and based on the current state of charge, current vehicle speed and current required driving power, energy management control of the voltage conversion device, power battery and engine is performed.

[0103] 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:

[0104] The first processing module 201 is configured to obtain, while the target vehicle is accelerating or traveling at a constant speed, the current connection status between the target vehicle and the network, the current state of charge of the power battery of the target vehicle, the current speed of the target vehicle, and the current required driving power of the target vehicle;

[0105] The second processing module 202 is used to control one or more of the voltage conversion device, power battery and engine of the target vehicle to provide driving power for the target vehicle, or to control the engine and / or the voltage conversion device to provide the driving power for the target vehicle and control the voltage conversion device to provide charging power for the target vehicle if the current connection state is connected, based on the current state of charge, the current vehicle speed and the current required driving power; wherein the voltage conversion device is used to provide the driving power and / or the charging power after voltage conversion of the electric energy output by the line network.

[0106] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0107] When it is determined that the power battery does not meet the charging conditions based on the comparison result of the currently required driving power and the output power limit of the voltage conversion device and the current state of charge, one or more of the voltage conversion device, the power battery and the engine are controlled to provide the driving power based on the current state of charge, the current vehicle speed and the currently required driving power.

[0108] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0109] If the current vehicle speed is less than or equal to a first preset vehicle speed, controlling the power battery and / or the voltage conversion device to provide the driving power based on the current state of charge and a comparison result of the current required driving power with the output power limit of the voltage conversion device;

[0110] If the current vehicle speed is greater than the first preset vehicle speed, the engine and / or the voltage conversion device is controlled to provide the driving power based on a comparison result of the current required driving power and the output power limit of the voltage conversion device.

[0111] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0112] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, based on a comparison result of the current state of charge and a first preset state of charge limit, controlling the power battery and / or the voltage conversion device to provide the driving power;

[0113] If the currently required driving power is greater than the output power limit of the voltage conversion device, the voltage conversion device is controlled to provide the driving power based on the output power limit of the voltage conversion device, and the output power of the power battery is controlled 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 first preset state of charge limit.

[0114] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0115] If the current state of charge is greater than or equal to the first preset state of charge limit, controlling the power battery to provide the driving power based on the current required driving power or the output power limit of the power battery, and controlling the output power of the voltage conversion device based on a comparison result of the output power limit of the power battery and the current required driving power;

[0116] If the current state of charge is less than the first preset state of charge limit, the voltage conversion device is controlled to provide the driving power.

[0117] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0118] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, controlling the voltage conversion device to provide the driving power;

[0119] If the currently required driving power is greater than the output power limit of the voltage conversion device, based on the comparison result between the current vehicle speed and the second preset vehicle speed, the engine is controlled to provide the driving power, or the engine and the voltage conversion device are controlled to provide the driving power; wherein, the second preset vehicle speed is greater than the first preset vehicle speed.

[0120] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0121] If the current vehicle speed is less than or equal to the second preset vehicle speed, controlling the voltage conversion device to provide the driving power based on the output power limit of the voltage conversion device, and controlling the engine to provide the driving power based on the difference between the current required driving power and the output power limit of the voltage conversion device;

[0122] If the current vehicle speed is greater than the second preset vehicle speed, the target operating point of the engine is determined based on the preset operating curve of the engine, and the engine is controlled to provide the driving power based on the target operating point, and the output power of the voltage conversion device is controlled based on the comparison result of the current required driving power and the power corresponding to the target operating point.

[0123] In an exemplary embodiment, the second processing module 202 is specifically configured to:

[0124] Based on the comparison result of the currently required driving power and the output power limit of the voltage conversion device and the current state of charge, when it is determined that the power battery meets the charging conditions, the engine and / or the voltage conversion device are controlled to provide the driving power and the voltage conversion device is controlled to provide the charging power based on the current state of charge and the currently required driving power.

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

[0126] If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, controlling the voltage conversion device to provide the driving power based on the currently required driving power, and controlling the voltage conversion device to provide the charging power based on the difference between the output power limit of the voltage conversion device and the currently required driving power until the current state of charge reaches a first preset state of charge limit;

[0127] If the currently required driving power is greater than the output power limit of the voltage conversion device, the engine is controlled to provide the driving power based on the currently required driving power, and the voltage conversion device is controlled to provide the charging power based on the output power limit of the voltage conversion device until the current state of charge reaches the first preset state of charge limit.

[0128] 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.

[0129] In this embodiment, the vehicle is a hybrid vehicle such as a hybrid passenger car, a hybrid commercial vehicle, or the like.

[0130] Figure 3 An example of a physical structure diagram of an electronic device is shown below. Figure 3As shown, the electronic device may include: a processor 301, a communication interface 302, a memory 303, and a communication bus 304, wherein the processor 301, the communication 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 a vehicle energy management method, which includes: when the target vehicle is accelerating or traveling at a constant speed, obtaining the current connection status of the target vehicle and the network, the current state of charge of the power battery of the target vehicle, the current speed of the target vehicle, and the current required driving power of the target vehicle;

[0131] If the current connection state is connected, based on the current state of charge, the current vehicle speed and the current required driving power, one or more of the voltage conversion device, power battery and engine of the target vehicle are controlled to provide driving power for the target vehicle, or the engine and / or the voltage conversion device are controlled to provide the driving power for the target vehicle and the voltage conversion device is controlled to provide charging power for the target vehicle; wherein the voltage conversion device is used to provide the driving power and / or the charging power after voltage conversion of the electric energy output by the line network.

[0132] 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.

[0133] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, and when the program instructions are executed by a computer, the computer is capable of executing the vehicle energy management method provided by the above-mentioned methods, the method comprising: while a target vehicle is accelerating or traveling at a constant speed, obtaining a current connection status between the target vehicle and a wired network, a current state of charge of a power battery of the target vehicle, a current speed of the target vehicle, and a current required driving power of the target vehicle;

[0134] If the current connection state is connected, based on the current state of charge, the current vehicle speed and the current required driving power, one or more of the voltage conversion device, power battery and engine of the target vehicle are controlled to provide driving power for the target vehicle, or the engine and / or the voltage conversion device are controlled to provide the driving power for the target vehicle and the voltage conversion device is controlled to provide charging power for the target vehicle; wherein the voltage conversion device is used to provide the driving power and / or the charging power after voltage conversion of the electric energy output by the line network.

[0135] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the vehicle energy management method provided above, the method comprising: while a target vehicle is accelerating or traveling at a constant speed, obtaining a current connection status between the target vehicle and a power network, a current state of charge of a power battery of the target vehicle, a current speed of the target vehicle, and a current required driving power of the target vehicle;

[0136] If the current connection state is connected, based on the current state of charge, the current vehicle speed and the current required driving power, one or more of the voltage conversion device, power battery and engine of the target vehicle are controlled to provide driving power for the target vehicle, or the engine and / or the voltage conversion device are controlled to provide the driving power for the target vehicle and the voltage conversion device is controlled to provide charging power for the target vehicle; wherein the voltage conversion device is used to provide the driving power and / or the charging power after voltage conversion of the electric energy output by the line network.

[0137] 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.

[0138] 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.

[0139] 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, obtaining the current connection status between the target vehicle and the network, the current state of charge of the power battery of the target vehicle, the current speed of the target vehicle, and the current required driving power of the target vehicle; If the current connection state is connected, based on the current state of charge, the current vehicle speed and the current required driving power, controlling one or more of the voltage conversion device, the power battery and the engine of the target vehicle to provide driving power for the target vehicle, or controlling the engine and / or the voltage conversion device to provide the driving power for the target vehicle and controlling the voltage conversion device to provide charging power for the target vehicle; wherein the voltage conversion device is used to convert the electric energy output by the line network into voltage and then provide the driving power and / or the charging power; The controlling one or more of a voltage conversion device, a power battery, and an engine of the target vehicle to provide driving power for the target vehicle based on the current state of charge, the current vehicle speed, and the current required driving power includes: When it is determined that the power battery does not meet the charging condition based on the comparison result of the current required driving power and the output power limit of the voltage conversion device and the current state of charge, if the current vehicle speed is less than or equal to a first preset vehicle speed, controlling the power battery and / or the voltage conversion device to provide the driving power based on the current state of charge and the comparison result of the current required driving power and the output power limit of the voltage conversion device; If the current vehicle speed is greater than the first preset vehicle speed, the engine and / or the voltage conversion device is controlled to provide the driving power based on a comparison result of the current required driving power and the output power limit of the voltage conversion device.

2. The vehicle energy management method according to claim 1, characterized in that: The controlling the power battery and / or the voltage conversion device to provide the driving power based on the comparison result of the current state of charge and the current required driving power with the output power limit of the voltage conversion device includes: If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, based on a comparison result of the current state of charge and a first preset state of charge limit, controlling the power battery and / or the voltage conversion device to provide the driving power; If the currently required driving power is greater than the output power limit of the voltage conversion device, the voltage conversion device is controlled to provide the driving power based on the output power limit of the voltage conversion device, and the output power of the power battery is controlled 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 first preset state of charge limit.

3. The vehicle energy management method according to claim 2, characterized in that: The controlling the power battery and / or the voltage conversion device to provide the driving power based on the comparison result of the current state of charge and the first preset state of charge limit value includes: If the current state of charge is greater than or equal to the first preset state of charge limit, controlling the power battery to provide the driving power based on the current required driving power or the output power limit of the power battery, and controlling the output power of the voltage conversion device based on a comparison result of the output power limit of the power battery and the current required driving power; If the current state of charge is less than the first preset state of charge limit, the voltage conversion device is controlled to provide the driving power.

4. The vehicle energy management method according to claim 1, characterized in that: The controlling the engine and / or the voltage conversion device to provide the driving power based on the comparison result of the currently required driving power and the output power limit of the voltage conversion device includes: If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, controlling the voltage conversion device to provide the driving power; If the currently required driving power is greater than the output power limit of the voltage conversion device, based on the comparison result between the current vehicle speed and the second preset vehicle speed, the engine is controlled to provide the driving power, or the engine and the voltage conversion device are controlled to provide the driving power; wherein, the second preset vehicle speed is greater than the first preset vehicle speed.

5. The vehicle energy management method according to claim 4, characterized in that: The controlling the engine to provide the driving power, or controlling the engine and the voltage conversion device to provide the driving power based on the comparison result between the current vehicle speed and the second preset vehicle speed, includes: If the current vehicle speed is less than or equal to the second preset vehicle speed, controlling the voltage conversion device to provide the driving power based on the output power limit of the voltage conversion device, and controlling the engine to provide the driving power based on the difference between the current required driving power and the output power limit of the voltage conversion device; If the current vehicle speed is greater than the second preset vehicle speed, the target operating point of the engine is determined based on the preset operating curve of the engine, and the engine is controlled to provide the driving power based on the target operating point, and the output power of the voltage conversion device is controlled based on the comparison result of the current required driving power and the power corresponding to the target operating point.

6. The vehicle energy management method according to any one of claims 1 to 5, characterized in that: The controlling the engine and / or the voltage conversion device to provide the driving power for the target vehicle and controlling the voltage conversion device to provide charging power for the target vehicle based on the current state of charge, the current vehicle speed, and the current required driving power includes: Based on the comparison result of the currently required driving power and the output power limit of the voltage conversion device and the current state of charge, when it is determined that the power battery meets the charging conditions, the engine and / or the voltage conversion device are controlled to provide the driving power and the voltage conversion device is controlled to provide the charging power based on the current state of charge and the currently required driving power.

7. The vehicle energy management method according to claim 6, characterized in that: The controlling the engine and / or the voltage conversion device to provide the driving power and controlling the voltage conversion device to provide the charging power based on the current state of charge and the current required driving power includes: If the currently required driving power is less than or equal to the output power limit of the voltage conversion device, controlling the voltage conversion device to provide the driving power based on the currently required driving power, and controlling the voltage conversion device to provide the charging power based on the difference between the output power limit of the voltage conversion device and the currently required driving power until the current state of charge reaches a first preset state of charge limit; If the currently required driving power is greater than the output power limit of the voltage conversion device, the engine is controlled to provide the driving power based on the currently required driving power, and the voltage conversion device is controlled to provide the charging power based on the output power limit of the voltage conversion device until the current state of charge reaches the first preset state of charge limit.

8. A vehicle energy management device, used to implement the vehicle energy management method according to claim 1, 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 connection status between the target vehicle and the wired network, a current state of charge of a power battery of the target vehicle, a current speed of the target vehicle, and a current required driving power of the target vehicle; The second processing module is used to control one or more of the voltage conversion device, power battery and engine of the target vehicle to provide driving power for the target vehicle, or to control the engine and / or the voltage conversion device to provide the driving power for the target vehicle and control the voltage conversion device to provide charging power for the target vehicle if the current connection state is connected, based on the current charge state, the current vehicle speed and the current required driving power; wherein, the voltage conversion device is used to provide the driving power and / or the charging power after voltage conversion of the electric energy output by the line network.

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

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