A vehicle control method, system and electronic device

Abstract

This invention provides a vehicle control method, system, and electronic device. The method involves: real-time detection of the actual remaining charge of the vehicle's power battery; when the actual remaining charge is greater than a preset high charge threshold, controlling the power battery to provide power to the vehicle; when the actual remaining charge is less than or equal to the high charge threshold, activating either a dual-power reduction mode or a smart charging mode; in the dual-power reduction mode, adjusting the vehicle's state to a preset state based on the actual remaining charge and the dual-power reduction strategy adopted; in the smart charging mode, adjusting the vehicle's state to a preset state based on the actual remaining charge and the smart charging strategy adopted. This avoids complete reliance on battery power under high charge conditions, thereby optimizing the overall vehicle range and protecting battery lifespan.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a vehicle control method, system, and electronic device. Background Technology

[0002] With the promotion of new energy vehicles, plug-in hybrid electric vehicles (PHEVs) are currently the most common type of new energy vehicle.

[0003] For PHEV vehicles, the current vehicle control strategy prioritizes the use of electric power until the electric range (i.e., EV range) is exhausted, at which point the engine is activated to enter hybrid mode. However, with this vehicle control strategy, high-speed driving under high battery conditions relies entirely on battery power. Frequent high-power discharges can affect battery life and prevent the overall vehicle range from reaching its optimal level. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a vehicle control method, system, and electronic device to solve the problems of current vehicle control strategies affecting battery life and failing to achieve optimal overall vehicle range.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] The first aspect of this invention discloses a vehicle control method, the method comprising:

[0007] Real-time monitoring of the vehicle's actual remaining battery power;

[0008] When the actual remaining power is greater than the preset high power threshold, the power battery is controlled to provide power to the vehicle.

[0009] When the actual remaining power is less than or equal to the high power threshold, activate the dual power reduction mode or the smart charging mode.

[0010] When the dual-power reduction mode is activated, the vehicle status corresponding to the vehicle is adjusted to a preset state based on the actual remaining power and the dual-power reduction strategy adopted by the dual-power reduction mode.

[0011] When the intelligent charging mode is activated, the vehicle status corresponding to the vehicle is adjusted to a preset state based on the actual remaining power and the intelligent charging strategy adopted by the intelligent charging mode.

[0012] Preferably, the oil and electricity reduction strategy adopted in the oil and electricity reduction mode is the first oil and electricity reduction strategy;

[0013] When the dual-power reduction mode is activated, based on the actual remaining battery power and the dual-power reduction strategy adopted by the dual-power reduction mode, the vehicle status is adjusted to a preset state, including:

[0014] When the aforementioned dual reduction in oil and electricity is activated, the first dual reduction strategy includes the following steps:

[0015] If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine is started when the vehicle speed is greater than the vehicle speed threshold.

[0016] Control the vehicle to upshift, and in high-speed direct drive mode, control the engine operating point within a preset range of the engine's economic zone line.

[0017] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

[0018] Preferably, the oil-electricity dual reduction mode adopts the second oil-electricity dual reduction strategy;

[0019] When the dual-power reduction mode is activated, based on the actual remaining battery power and the dual-power reduction strategy adopted by the dual-power reduction mode, the vehicle status is adjusted to a preset state, including:

[0020] When the aforementioned dual reduction in oil and electricity is activated, the second dual reduction strategy includes the following steps:

[0021] If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold.

[0022] Control the vehicle to upshift and dynamically switch between the vehicle's high-speed cycle operating condition pure electric mode and engine direct drive mode;

[0023] When the load demand in the engine direct drive mode is greater than or equal to the load threshold, the engine operating point is controlled at the engine economic zone line.

[0024] When the load demand in the engine direct drive mode is less than the load threshold, the engine operating point is controlled below the engine economic zone line.

[0025] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

[0026] Preferably, the oil and electricity reduction strategy adopted in the oil and electricity reduction mode is the third oil and electricity reduction strategy;

[0027] When the dual-power reduction mode is activated, based on the actual remaining battery power and the dual-power reduction strategy adopted by the dual-power reduction mode, the vehicle status is adjusted to a preset state, including:

[0028] When the aforementioned dual reduction in oil and electricity is activated, the third dual reduction strategy includes the following steps:

[0029] If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold.

[0030] Control the vehicle to upshift and dynamically switch between the vehicle's high-speed cycle operating condition pure electric mode and engine direct drive mode;

[0031] In the engine direct drive mode, the engine operating point is controlled at the engine economic zone line;

[0032] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

[0033] Preferably, when the intelligent charging mode is activated, based on the actual remaining battery power and the intelligent charging strategy adopted by the intelligent charging mode, the vehicle status corresponding to the vehicle is adjusted to a preset state, including:

[0034] When the intelligent charging mode is enabled, the intelligent charging strategy implemented includes the following steps:

[0035] If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold.

[0036] Control the vehicle to shift up;

[0037] In high-speed cycle operating condition pure electric mode, the engine operating point is controlled at the engine economic zone line;

[0038] When the vehicle speed is within a preset speed range, the engine is controlled to run and the power battery is charged until the actual remaining power reaches the preset target remaining power, at which point the oil and electric power reduction mode is activated.

[0039] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

[0040] Preferably, if the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle is adjusted to a preset state according to a preset driving strategy, including:

[0041] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the preset driving strategy to be executed includes the following steps:

[0042] If the actual remaining battery power is less than the lower limit of the remaining battery power range but greater than or equal to the first battery power threshold, the vehicle is controlled to maintain battery power, and the engine power threshold and vehicle speed threshold are reduced based on the difference between the actual remaining battery power and the preset target remaining battery power.

[0043] If the actual remaining power is less than the first power threshold and greater than the second power threshold, the engine is started to generate electricity, and the engine operating point is controlled within a preset range of the engine economic zone line.

[0044] If the actual remaining power is less than or equal to the second power threshold and greater than the third power threshold, the assist power of the power battery is limited;

[0045] If the actual remaining power is less than or equal to the fourth power threshold, the engine is started to force charge the power battery.

[0046] Preferably, the method further includes:

[0047] When the dual-power reduction mode is activated, the reduction process of the actual remaining power is controlled based on the actual remaining power and the preset energy management strategy.

[0048] Preferably, when the dual-mode power reduction is activated, the decrease in the actual remaining power is controlled based on the actual remaining power and a preset energy management strategy, including:

[0049] When the dual-power reduction mode is activated, if the actual remaining power is less than the fifth power threshold, based on the pre-calibrated positive and negative change rates, the preset virtual target remaining power is controlled to perform periodic positive and negative compensation around the actual remaining power to activate the engine start-up and shutdown conditions of the vehicle.

[0050] A second aspect of this invention discloses a vehicle control system, the system comprising:

[0051] The detection unit is used to detect the actual remaining charge of the vehicle's power battery in real time.

[0052] The power supply unit is used to control the power battery to provide power to the vehicle when the actual remaining power is greater than a preset high power threshold.

[0053] The start-up unit is used to activate the dual-power reduction mode or the smart charging mode when the actual remaining power is less than or equal to the high power threshold.

[0054] The first control unit is used to adjust the vehicle status of the vehicle to a preset state based on the actual remaining power and the oil-electricity reduction strategy adopted by the oil-electricity reduction mode when the oil-electricity reduction mode is activated.

[0055] The second control unit is used to adjust the vehicle status to a preset state based on the actual remaining battery power and the intelligent charging strategy adopted by the intelligent charging mode when the intelligent charging mode is activated.

[0056] A third aspect of the present invention discloses an electronic device, characterized in that it includes: a processor and a memory, the processor and the memory being connected via a communication bus; wherein, the processor is used to call and execute a program stored in the memory; the memory is used to store the program, the program being used to implement the vehicle control method disclosed in the first aspect of the present invention.

[0057] Based on the vehicle control method, system, and electronic device provided by the above embodiments of the present invention, the method comprises: real-time detection of the actual remaining charge of the vehicle's power battery; when the actual remaining charge is greater than a preset high charge threshold, controlling the power battery to provide power to the vehicle; when the actual remaining charge is less than or equal to the high charge threshold, activating a dual-battery power reduction mode or a smart charging mode; when the dual-battery power reduction mode is activated, adjusting the vehicle's corresponding state to a preset state based on the actual remaining charge and the dual-battery power reduction strategy adopted by the dual-battery power reduction mode; when the smart charging mode is activated, adjusting the vehicle's corresponding state to a preset state based on the actual remaining charge and the smart charging strategy adopted by the smart charging mode. In this solution, when the actual remaining charge is greater than the high charge threshold, the power battery is preferentially used to provide power to the vehicle; when the actual remaining charge is less than or equal to the high charge threshold, the dual-battery power reduction strategy of the dual-battery power reduction mode or the smart charging strategy of the smart charging mode is used to control the vehicle's driving, avoiding complete reliance on battery drive under high charge conditions. This optimizes the overall vehicle range and protects battery life. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0059] Figure 1 A flowchart of a vehicle control method provided in an embodiment of the present invention;

[0060] Figure 2 This is a line graph illustrating engine start / stop control based on drive torque, provided in an embodiment of the present invention.

[0061] Figure 3 A schematic diagram illustrating an energy management strategy provided in an embodiment of the present invention;

[0062] Figure 4 This is another broken-line diagram of engine start / stop control based on drive torque provided in an embodiment of the present invention;

[0063] Figure 5 This is a schematic diagram illustrating the dynamic switching between starting the engine and starting the EV in intermittent mode, as provided in an embodiment of the present invention.

[0064] Figure 6 A schematic diagram illustrating the power allocation principle provided in an embodiment of the present invention;

[0065] Figure 7 Another schematic diagram of the energy management strategy provided in an embodiment of the present invention;

[0066] Figure 8 This is a structural block diagram of a vehicle control system provided in an embodiment of the present invention. Detailed Implementation

[0067] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0068] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] As can be seen from the background technology, current vehicle control strategies rely entirely on battery power at high speeds under high battery conditions. Frequent high-power discharges will affect battery life and prevent the overall vehicle range from reaching its optimal level.

[0070] Therefore, embodiments of the present invention provide a vehicle control method, system, and electronic device. When the actual remaining battery power is greater than a high battery power threshold, the power battery is controlled to provide power to the vehicle; when the actual remaining battery power is less than or equal to the high battery power threshold, a dual-power reduction strategy (dual-power reduction mode) or a smart charging strategy (smart charging mode) is used to control the vehicle's driving, avoiding complete reliance on battery power under high battery power conditions. This optimizes the overall vehicle range and protects battery lifespan.

[0071] See Figure 1 The diagram illustrates a flowchart of a vehicle control method provided by an embodiment of the present invention, the vehicle control method comprising:

[0072] Step S101: Real-time detection of the actual remaining charge of the vehicle's power battery.

[0073] In the specific implementation of step S101, the remaining power battery (State of Charge, SOC) of the vehicle is detected in real time during the vehicle's operation to obtain the actual remaining power battery (actual SOC).

[0074] Step S102: When the actual remaining power is greater than the preset high power threshold, control the power battery to provide power to the vehicle.

[0075] In the specific implementation of step S102, when the actual remaining battery power is greater than the preset high battery power threshold, it indicates that the charging power is low and is detrimental to the safety of the power battery. At this time, the power battery is controlled to provide power to the vehicle. During vehicle operation, the actual remaining battery power may gradually decrease. When the actual remaining battery power is less than or equal to the high battery power threshold, step S103 is executed.

[0076] For example, when the actual remaining power is greater than 80%, the power battery is controlled to provide power to the vehicle (or in other words, power is used preferentially).

[0077] Step S103: When the actual remaining power is less than or equal to the high power threshold, activate the dual-power reduction mode or the smart charging mode.

[0078] It should be noted that the oil and electricity reduction mode adopts any one of the multiple oil and electricity reduction strategies.

[0079] In the specific implementation of step S103, when the actual remaining power is less than or equal to the high power threshold, the dual power reduction mode or the smart charging mode is activated.

[0080] In some embodiments, when the actual remaining battery power is less than or equal to the high battery power threshold, the dual-power reduction mode or smart charging mode is activated based on the instructions set by the user in advance on the vehicle's human-machine interaction device.

[0081] In other embodiments, when the actual remaining battery power is less than or equal to the high battery power threshold, the smart charging mode is activated based on the instructions set by the user in advance on the vehicle's human-machine interaction device; after the smart charging mode is activated, it is then determined whether to activate (or switch) the dual-power mode based on the actual situation of the vehicle.

[0082] Step S104: When the dual-power mode is activated, the vehicle status is adjusted to the preset state based on the actual remaining power and the dual-power strategy adopted by the dual-power mode.

[0083] It should be noted that vehicle status includes, but is not limited to, the status of the engine and the status of the transmission.

[0084] In some embodiments, the dual-mode power-to-electricity reduction strategy includes a first dual-mode power-to-electricity reduction strategy, a second dual-mode power-to-electricity reduction strategy, and a third dual-mode power-to-electricity reduction strategy. After activating the dual-mode power-to-electricity reduction mode, the way the vehicle state is adjusted (or the way the vehicle is controlled) differs depending on the dual-mode power-to-electricity reduction strategy adopted. The following explains the way the vehicle is controlled under different dual-mode power-to-electricity reduction strategies.

[0085] Explanation of how the vehicle status is adjusted when using the first oil-electric dual-reduction strategy in the dual-mode hybrid system:

[0086] When the dual-battery power reduction mode is activated and the first dual-battery power reduction strategy is adopted, the first dual-battery power reduction strategy includes the following steps: If the actual remaining battery power is within a preset remaining battery power range (e.g., 20%-80%), the engine start-stop control table (also known as the engine start-stop map) is used to control the start-stop status of the vehicle's engine, and the engine is started when the vehicle speed is greater than a speed threshold, for example, when the vehicle speed is greater than 50 kph. The vehicle is controlled to upshift, and in high-speed direct drive mode, the engine operating point is controlled within a preset range of the engine's optimal operating line (OOL); for example, in high-battery direct drive mode, the vehicle is controlled to upshift to second gear, and in high-speed direct drive mode, the engine operating point is controlled near OOL. Since the shift from first to second gear occurs early, the engine speed after upshifting is around 1350 rpm. The above describes the process of adjusting the vehicle's state when the actual remaining battery power is within the preset remaining battery power range.

[0087] If the actual remaining battery power is less than the lower limit of the remaining battery power range (e.g., 20%), the vehicle status will be adjusted to the preset status according to the preset driving strategy.

[0088] It should be noted that the engine start-stop map is pre-calibrated; this engine start-stop map allows for control of the engine's start-stop state based on drive torque (or power); for example, through... Figure 2 The provided line graph diagram illustrating engine start-stop control based on drive torque shows that the engine's start-stop state is controlled based on drive torque. Furthermore... Figure 2 The document also shows the dividing line between EV (Electric Vehicle) mode and HEV (Hybrid Electric Vehicle) mode, where EV mode is also known as pure electric mode.

[0089] Explanation of how the vehicle status is adjusted when the second oil-electric dual-reduction strategy is adopted in the dual-reduction mode:

[0090] When the dual-mode power reduction is activated and the second dual-mode power reduction strategy is employed, the second strategy includes the following steps: If the actual remaining battery power is within a preset remaining battery power range, the engine start-stop control table is used to control the engine's start-stop status, and the engine will not start when the vehicle speed exceeds a speed threshold; for example, the engine will not start when the vehicle speed exceeds 50 kph. The vehicle is controlled to upshift, and the high-speed cycle pure electric mode and engine direct drive mode are dynamically switched. Specifically, the high-speed cycle EV mode and engine direct drive mode can be dynamically switched through calibration. When the load demand in engine direct drive mode is greater than or equal to the load threshold, the engine operating point is controlled at the engine's economic zone line; when the load demand in engine direct drive mode is less than the load threshold, the engine operating point is controlled below the engine's economic zone line, thereby balancing constant speed scenarios and acceleration scenarios. The above describes the process of adjusting the vehicle's state when the actual remaining battery power is within the preset remaining battery power range.

[0091] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status will be adjusted to the preset status according to the preset driving strategy.

[0092] Explanation of how the vehicle status is adjusted when the third oil-electric dual-reduction strategy is adopted in the oil-electric dual-reduction mode:

[0093] When the dual-battery power reduction mode is activated and a third dual-battery power reduction strategy is employed, the third strategy includes the following steps: If the actual remaining battery power is within a preset range, the engine start-stop control is used to control the engine's start-stop status, and the engine will not start when the vehicle speed exceeds a speed threshold. Specifically, the engine start-stop status is controlled based on a 30kW power demand threshold (for example only); the vehicle is controlled to upshift, and the high-speed cycle pure electric mode and engine direct drive mode are dynamically switched; in engine direct drive mode, the engine operating point is controlled within the engine's economic zone. The foregoing describes the process of adjusting the vehicle's state when the actual remaining battery power is within the preset range.

[0094] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status will be adjusted to the preset status according to the preset driving strategy.

[0095] The above explains how to adjust vehicle status under different dual-mode (fuel and electric) power reduction strategies. After activating the dual-mode, the power reduction strategy can be determined based on the actual situation. For example, users can choose a power reduction strategy themselves or use any default strategy. The third power reduction strategy is preferred in the dual-mode.

[0096] Step S105: When the smart charging mode is enabled, adjust the vehicle status to the preset state based on the actual remaining power and the smart charging strategy adopted by the smart charging mode.

[0097] In the specific implementation of step S105, when the intelligent charging mode is activated, the intelligent charging strategy includes the following steps: If the actual remaining battery power is within a preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine is not started when the vehicle speed is greater than the vehicle speed threshold, specifically based on the required power of 30kW (for example only); the vehicle is controlled to shift up; in the high-speed cycle pure electric mode, the engine operating point is controlled at the engine's economic zone line; when the vehicle speed is within a preset speed range (e.g., 70kph to 115kph), the engine is controlled to run and charge the power battery (equivalent to the engine not stopping for slow charging), until the actual remaining battery power reaches the preset target remaining battery power, then the dual-mode of reducing power consumption is activated (or switched to). The target remaining battery power is set by the user, and the target remaining battery power is <80%, and the target remaining battery power is > the actual remaining battery power. The above describes the process of adjusting the vehicle state when the actual remaining battery power is within the preset remaining battery power range.

[0098] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status will be adjusted to the preset status according to the preset driving strategy.

[0099] As can be seen from the above steps S104 and S105, after activating the dual-power mode or the intelligent charging mode, if the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status will be adjusted to the preset state according to the preset driving strategy. The following is an explanation of the preset driving strategy.

[0100] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the driving strategy includes the following steps: If the actual remaining battery power is less than the lower limit of the remaining battery power range but greater than or equal to the first battery power threshold, control the vehicle to maintain battery power (charge sustain, CS). For example, if the actual remaining battery power is less than 20% but greater than or equal to 15%, control the vehicle to maintain battery power. And based on the difference between the actual remaining battery power and the preset target remaining battery power, reduce the engine power threshold and vehicle speed threshold. Specifically, using delta SOC and calibration methods, reduce the engine power threshold and vehicle speed threshold to make the engine start more aggressively.

[0101] Where delta SOC = target remaining power - actual remaining power.

[0102] If the actual remaining power is less than the first power threshold but greater than the second power threshold, the engine is started to generate electricity, and the engine's operating point is controlled within a preset range of the engine's economic zone. For example, if the actual remaining power is less than 15% but greater than 13%, the engine is started to generate electricity, and the engine's operating point is controlled within a preset range of the engine's economic zone, thereby achieving efficient power generation.

[0103] If the actual remaining charge is less than or equal to the second charge threshold and greater than the third charge threshold, the assist power of the power battery is limited; for example, if the actual remaining charge is less than or equal to 13% and greater than 11%, the assist power of the power battery is limited; specifically, the assist power of the power battery is limited through software logic and calibration methods.

[0104] If the actual remaining battery power is less than or equal to the fourth battery power threshold, start the engine to force charge the power battery. For example, if the actual remaining battery power is less than or equal to 10.5%, start the engine to force charge the power battery.

[0105] The above content is a description of the preset driving strategy. Combining the content of steps S104 and S105 above, the following advantages of the dual-mode power reduction and intelligent charging mode can be obtained.

[0106] The advantages of the dual-power mode with the first oil-electric dual-reduction strategy are: the engine actively starts to assist in driving the vehicle at medium and high speeds, which can reduce the power output of the power battery, and the NVH (Noise, Vibration, Harshness) effect is good at high speeds; the overall driving range is longer; at high speeds and constant speeds, the engine does not stop when operating at low load, maintaining the actual remaining power charge and avoiding frequent engine start-stop.

[0107] The advantages of the dual-mode hybrid power reduction strategy (either the second or third strategy) are as follows: at medium to high vehicle speeds, the engine actively starts to assist in driving the vehicle, which can reduce the power output of the battery and provide good NVH performance at high speeds; the overall driving range is longer; and at high speeds, the engine operates in the engine's economic zone, alternating with the EV's shutdown.

[0108] Advantages of intelligent charging mode: Users can set a target remaining battery level; the engine charges at an economical rate when the vehicle speed is above 70kph (this is just an example, equivalent to the lower limit or left boundary of the preset speed range).

[0109] In some embodiments, when the dual-power reduction mode is activated, in order to implement the dual-power reduction strategy adopted by the dual-power reduction mode, it is necessary to introduce a virtual target remaining power (virtual target SOC) to control the reduction process of the actual remaining power.

[0110] Preferably, when the dual-power reduction mode is activated, the decrease in the actual remaining power is controlled based on the actual remaining power and a preset energy management strategy. Specifically, when the dual-power reduction mode is activated, if the actual remaining power is less than a fifth power threshold (e.g., 75%), a preset virtual target remaining power is periodically compensated for positive and negative changes around the actual remaining power based on pre-calibrated positive and negative change rates, thereby activating the vehicle's engine start-up and shutdown conditions.

[0111] To better explain how to control the decrease in actual remaining power, by... Figure 3 The provided diagram illustrates the energy management strategy. Figure 3 It contains 5 steps (referred to as steps 1 to 5).

[0112] Step 1: When the actual SOC is greater than 80% (high battery threshold), ensure EV driving; reset the virtual target SOC to the real target SOC.

[0113] Step 2: When the actual SOC is less than 75%, the virtual target SOC is periodically compensated for positive and negative values ​​around the actual SOC to activate the engine start-up and shutdown conditions of the vehicle.

[0114] In practice, the virtual target SOC is periodically compensated for positive and negative values ​​around the actual SOC based on "+3%" and "-3%". The positive and negative compensation values ​​can be calibrated according to the vehicle power demand table.

[0115] Step 3, the positive and negative rates of change can be calibrated based on the vehicle power demand table.

[0116] Step 4: When the virtual target SOC is close to the actual SOC, reset the virtual target SOC to the actual target SOC.

[0117] Step 5: The maximum value of the virtual target SOC is 80%, and the minimum value of the virtual target SOC is the real target SOC.

[0118] pass Figure 3 The energy management strategy shown can achieve a dual reduction in oil and electricity costs by introducing a virtual target SOC.

[0119] In some embodiments, the actual remaining battery power range varies, and the engine start-stop control table that controls the engine start-stop state also differs; for example... Figure 4 Another line graph diagram based on drive torque control of engine start-stop is provided. When the actual remaining battery power is between 20% and 80% and a dual-power (oil and electric) reduction strategy is adopted, the line graph based on drive torque control of engine start-stop can be found here. Figure 4The line graph corresponding to "dual reduction in oil and electricity consumption" is shown in the image. For a line graph showing engine start / stop control based on drive torque when the actual remaining battery level is between 15% and 20% and battery hold (CS) is in effect, please refer to [reference needed]. Figure 4 The line chart corresponding to "CS" in the middle.

[0120] exist Figure 4 Based on this, in Intermittent Mode, the method of dynamically switching between Engine On and EV start-up is described in [reference needed]. Figure 5 The diagram illustrates the dynamic switching between starting the engine and starting the EV in intermittent mode. Figure 4 Based on this, the power distribution principle of the vehicle is described in [reference needed]. Figure 6 The diagram shows the power allocation principle.

[0121] In some embodiments, after the smart charging mode is activated, a target remaining power (target SOC) is introduced to control the decrease in the actual remaining power. When the smart charging mode is enabled, the decrease in the actual remaining power is controlled based on the actual remaining power and a preset energy management strategy.

[0122] For details, please refer to Figure 7 Another diagram illustrating the provided energy management strategy, Figure 7 This includes energy management strategies for both gasoline and electric power reduction modes and smart charging modes; details of the energy management strategies can be found above. Figure 3 The relevant explanations will not be repeated here.

[0123] The above content is an explanation of how to control the vehicle in both hybrid and electric power reduction modes and intelligent charging mode.

[0124] In the dual-mode of oil and electric power reduction, when the actual SOC is greater than 13% and less than 80%, the vehicle's engine actively starts and intervenes; the engine start timing is determined based on the 30kW line; the engine operates at OOL; when driving at a constant speed, the engine start and stop are alternately enabled based on the actual SOC.

[0125] In smart charging mode, users can set a target SOC on the vehicle's human-machine interface; the engine starts when the vehicle speed is greater than 70kph and charges slowly at OOL; when the vehicle speed is less than 70kph, the engine stops freely based on the 30kW line and does not focus on charging (i.e., smart charging and discharging); when the actual SOC reaches the target SOC, the engine starts and stops alternately to keep the battery level near the target SOC.

[0126] In this embodiment of the invention, when the actual remaining battery power is greater than the high battery power threshold, the power battery is controlled to provide power to the vehicle; when the actual remaining battery power is less than or equal to the high battery power threshold, the vehicle is controlled using either the dual-power reduction strategy of the dual-power reduction mode or the intelligent charging strategy of the intelligent charging mode, avoiding complete reliance on battery power under high battery conditions. This optimizes the overall driving range of the vehicle and protects the battery life.

[0127] Corresponding to the vehicle control method provided in the above embodiments of the present invention, see also... Figure 8 The present invention also provides a structural block diagram of a vehicle control system, which includes: a detection unit 801, a power supply unit 802, a starting unit 803, a first control unit 804, and a second control unit 805;

[0128] The detection unit 801 is used to detect the actual remaining charge of the vehicle's power battery in real time.

[0129] The power supply unit 802 is used to control the power battery to provide power to the vehicle when the actual remaining power is greater than a preset high power threshold.

[0130] The start-up unit 803 is used to activate the dual-power reduction mode or the smart charging mode when the actual remaining power is less than or equal to the high power threshold.

[0131] The first control unit 804 is used to adjust the vehicle status to a preset state based on the actual remaining battery power and the dual-power reduction strategy adopted by the dual-power reduction mode when the dual-power reduction mode is activated.

[0132] The second control unit 805 is used to adjust the vehicle status to a preset state based on the actual remaining power and the intelligent charging strategy adopted by the intelligent charging mode when the intelligent charging mode is activated.

[0133] In this embodiment of the invention, when the actual remaining battery power is greater than the high battery power threshold, the power battery is controlled to provide power to the vehicle; when the actual remaining battery power is less than or equal to the high battery power threshold, the vehicle is controlled using either the dual-power reduction strategy of the dual-power reduction mode or the intelligent charging strategy of the intelligent charging mode, avoiding complete reliance on battery power under high battery conditions. This optimizes the overall driving range of the vehicle and protects the battery life.

[0134] Preferred, combined Figure 8 The content shown indicates that the oil-electric dual-reduction mode employs the first oil-electric dual-reduction strategy; the first control unit 804 is specifically used for:

[0135] When the dual-power mode is activated, the first dual-power strategy includes the following steps: if the actual remaining power is within the preset remaining power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine is started when the vehicle speed is greater than the vehicle speed threshold.

[0136] Control the vehicle to shift up gears, and in high-speed direct drive mode, keep the engine's operating point within the preset range of the engine's economic zone.

[0137] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status will be adjusted to the preset status according to the preset driving strategy.

[0138] Preferred, combined Figure 8 The content shown indicates that the oil-electric dual-reduction mode employs the second oil-electric dual-reduction strategy; the first control unit 804 is specifically used for:

[0139] When the dual-power mode is activated, the second dual-power strategy includes the following steps: if the actual remaining power is within the preset remaining power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold.

[0140] Control the vehicle to upshift and dynamically switch between the vehicle's high-speed cycle pure electric mode and engine direct drive mode.

[0141] When the load demand in engine direct drive mode is greater than or equal to the load threshold, the engine operating point is controlled at the engine economic zone line; when the load demand in engine direct drive mode is less than the load threshold, the engine operating point is controlled below the engine economic zone line.

[0142] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status will be adjusted to the preset status according to the preset driving strategy.

[0143] Preferred, combined Figure 8 The content shown indicates that the oil-electric dual-reduction mode employs the third oil-electric dual-reduction strategy; the first control unit 804 is specifically used for:

[0144] When the dual-power mode is activated, the third dual-power strategy includes the following steps: if the actual remaining power is within the preset remaining power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold.

[0145] Control the vehicle to upshift and dynamically switch between the vehicle's high-speed cycle pure electric mode and engine direct drive mode.

[0146] In engine direct drive mode, the engine operating point is controlled within the engine's economic zone.

[0147] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status will be adjusted to the preset status according to the preset driving strategy.

[0148] Preferred, combined Figure 8 As shown, the second control unit 805 is specifically used to: when the intelligent charging mode is activated, the intelligent charging strategy includes the following steps: if the actual remaining power is within the preset remaining power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine is not started when the vehicle speed is greater than the vehicle speed threshold.

[0149] Control the vehicle to upshift. In high-speed cycle pure electric mode, keep the engine's operating point within the engine's economic zone.

[0150] When the vehicle speed is within the preset speed range, the engine is controlled to run and charge the power battery until the actual remaining power reaches the preset target remaining power, at which point the dual-power mode is activated.

[0151] If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status will be adjusted to the preset status according to the preset driving strategy.

[0152] In some embodiments, the first control unit 804 and the second control unit 805 are specifically used to: if the actual remaining battery power is less than the lower limit of the remaining battery power range, execute a preset driving strategy including the following steps: if the actual remaining battery power is less than the lower limit of the remaining battery power range but greater than or equal to a first battery power threshold, control the vehicle to maintain battery power, and reduce the engine power threshold and vehicle speed threshold based on the difference between the actual remaining battery power and the preset target remaining battery power; if the actual remaining battery power is less than the first battery power threshold but greater than a second battery power threshold, start the engine to generate electricity, and control the engine operating point within a preset range of the engine's economic zone line; if the actual remaining battery power is less than or equal to the second battery power threshold but greater than a third battery power threshold, limit the assist power of the power battery; if the actual remaining battery power is less than or equal to a fourth battery power threshold, start the engine to forcibly charge the power battery.

[0153] Preferred, combined Figure 8 The vehicle control system, as shown, also includes:

[0154] The third control unit is used to control the decrease of the actual remaining power based on the actual remaining power and the preset energy management strategy when the dual-power reduction mode is activated.

[0155] In specific implementation, the third control unit is used to: when the dual-power mode is activated and the actual remaining power is less than the fifth power threshold, control the preset virtual target remaining power to perform periodic positive and negative compensation around the actual remaining power based on the pre-calibrated positive and negative change rates, so as to activate the engine start-up and shutdown conditions of the vehicle.

[0156] Preferably, the present invention also provides an electronic device, including: a processor and a memory, the processor and the memory being connected via a communication bus; wherein, the processor is used to call and execute a program stored in the memory; the memory is used to store the program, the program being used to implement the vehicle control method provided in the above method embodiments.

[0157] In summary, the embodiments of the present invention provide a vehicle control method, system, and electronic device. When the actual remaining battery power is greater than a high battery power threshold, the power battery is controlled to provide power to the vehicle; when the actual remaining battery power is less than or equal to the high battery power threshold, a dual-power reduction strategy (dual-power reduction mode) or a smart charging strategy (smart charging mode) is used to control the vehicle's driving, avoiding complete reliance on battery power under high battery power conditions. This optimizes the overall vehicle range and protects battery lifespan.

[0158] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0159] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0160] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle control method, characterized in that, The method includes: Real-time monitoring of the vehicle's actual remaining battery power; When the actual remaining power is greater than the preset high power threshold, the power battery is controlled to provide power to the vehicle. When the actual remaining power is less than or equal to the high power threshold, activate the dual power reduction mode or the smart charging mode. When the dual-power reduction mode is activated, the vehicle status corresponding to the vehicle is adjusted to a preset state based on the actual remaining power and the dual-power reduction strategy adopted by the dual-power reduction mode. The dual-power reduction mode adopts any one of multiple dual-power reduction strategies. When the intelligent charging mode is enabled, the intelligent charging strategy implemented includes the following steps: If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold. Control the vehicle to shift up; In high-speed cycle operating condition pure electric mode, the engine operating point is controlled at the engine economic zone line; When the vehicle speed is within a preset speed range, the engine is controlled to run and the power battery is charged until the actual remaining power reaches the preset target remaining power, at which point the oil and electric power reduction mode is activated. If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

2. The method according to claim 1, characterized in that, The oil and electricity reduction strategy adopted in the oil and electricity reduction mode is the first oil and electricity reduction strategy. When the dual-power reduction mode is activated, based on the actual remaining battery power and the dual-power reduction strategy adopted by the dual-power reduction mode, the vehicle status is adjusted to a preset state, including: When the aforementioned dual reduction in oil and electricity is activated, the first dual reduction strategy includes the following steps: If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine is started when the vehicle speed is greater than the vehicle speed threshold. Control the vehicle to upshift, and in high-speed direct drive mode, control the engine operating point within a preset range of the engine's economic zone line. If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

3. The method according to claim 1, characterized in that, The oil and electricity reduction strategy adopted in the oil and electricity reduction mode is the second oil and electricity reduction strategy; When the dual-power reduction mode is activated, based on the actual remaining battery power and the dual-power reduction strategy adopted by the dual-power reduction mode, the vehicle status is adjusted to a preset state, including: When the aforementioned dual reduction in oil and electricity is activated, the second dual reduction strategy includes the following steps: If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold. Control the vehicle to upshift and dynamically switch between the vehicle's high-speed cycle operating condition pure electric mode and engine direct drive mode; When the load demand in the engine direct drive mode is greater than or equal to the load threshold, the engine operating point is controlled at the engine economic zone line. When the load demand in the engine direct drive mode is less than the load threshold, the engine operating point is controlled below the engine economic zone line. If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

4. The method according to claim 1, characterized in that, The oil and electricity reduction strategy adopted in the oil and electricity reduction mode is the third oil and electricity reduction strategy. When the dual-power reduction mode is activated, based on the actual remaining battery power and the dual-power reduction strategy adopted by the dual-power reduction mode, the vehicle status is adjusted to a preset state, including: When the aforementioned dual reduction in oil and electricity is activated, the third dual reduction strategy includes the following steps: If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold. Control the vehicle to upshift and dynamically switch between the vehicle's high-speed cycle operating condition pure electric mode and engine direct drive mode; In the engine direct drive mode, the engine operating point is controlled at the engine economic zone line; If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

5. The method according to any one of claims 2-4, characterized in that, If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status is adjusted to a preset state according to a preset driving strategy, including: If the actual remaining battery power is less than the lower limit of the remaining battery power range, the preset driving strategy to be executed includes the following steps: If the actual remaining battery power is less than the lower limit of the remaining battery power range but greater than or equal to the first battery power threshold, the vehicle is controlled to maintain battery power, and the engine power threshold and vehicle speed threshold are reduced based on the difference between the actual remaining battery power and the preset target remaining battery power. If the actual remaining power is less than the first power threshold and greater than the second power threshold, the engine is started to generate electricity, and the engine operating point is controlled within a preset range of the engine economic zone line. If the actual remaining power is less than or equal to the second power threshold and greater than the third power threshold, the assist power of the power battery is limited; If the actual remaining power is less than or equal to the fourth power threshold, the engine is started to force charge the power battery.

6. The method according to claim 1, characterized in that, The method further includes: When the dual-power reduction mode is activated, the reduction process of the actual remaining power is controlled based on the actual remaining power and the preset energy management strategy.

7. The method according to claim 6, characterized in that, When the dual-power reduction mode is activated, the reduction process of the actual remaining power is controlled based on the actual remaining power and a preset energy management strategy, including: When the dual-power reduction mode is activated, if the actual remaining power is less than the fifth power threshold, based on the pre-calibrated positive and negative change rates, the preset virtual target remaining power is controlled to perform periodic positive and negative compensation around the actual remaining power to activate the engine start-up and shutdown conditions of the vehicle.

8. A vehicle control system, characterized in that, The system includes: The detection unit is used to detect the actual remaining charge of the vehicle's power battery in real time. The power supply unit is used to control the power battery to provide power to the vehicle when the actual remaining power is greater than a preset high power threshold. The start-up unit is used to activate the dual-power reduction mode or the smart charging mode when the actual remaining power is less than or equal to the high power threshold. The first control unit is used to adjust the vehicle state corresponding to the vehicle to a preset state based on the actual remaining power and the oil-electricity reduction strategy adopted by the oil-electricity reduction mode when the oil-electricity reduction mode is activated. The oil-electricity reduction mode adopts any one of multiple oil-electricity reduction strategies. The second control unit, when the intelligent charging mode is activated, executes an intelligent charging strategy including the following steps: If the actual remaining battery power is within the preset remaining battery power range, the engine start-stop control table is used to control the start-stop state of the vehicle's engine, and the engine will not start when the vehicle speed is greater than the vehicle speed threshold. Control the vehicle to shift up; In high-speed cycle operating condition pure electric mode, the engine operating point is controlled at the engine economic zone line; When the vehicle speed is within a preset speed range, the engine is controlled to run and the power battery is charged until the actual remaining power reaches the preset target remaining power, at which point the oil and electric power reduction mode is activated. If the actual remaining battery power is less than the lower limit of the remaining battery power range, the vehicle status corresponding to the vehicle will be adjusted to the preset status according to the preset driving strategy.

9. An electronic device, characterized in that, include: A processor and a memory are connected via a communication bus; wherein the processor is used to call and execute a program stored in the memory; The memory is used to store a program for implementing the vehicle control method as described in any one of claims 1-7.

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