A vehicle control method, device, vehicle controller and vehicle

Abstract

The application provides a vehicle control method and device, a whole vehicle controller and a vehicle, and belongs to the technical field of automobiles. The method comprises the following steps: when the high-voltage system of the vehicle is started, the speed of the vehicle and the power battery capacity are acquired; and when the power battery capacity and the speed of the vehicle both meet preset conditions, the vehicle is controlled to shut down the high-voltage system, and the vehicle is prohibited from starting the high-voltage system again. According to the above method, when the power battery capacity and the speed of the vehicle both meet preset conditions, the vehicle is not only controlled to shut down the high-voltage system, but also prohibited from starting the high-voltage system again, so that the high-voltage system is prevented from being started repeatedly, the power battery capacity is prevented from being consumed repeatedly, and the power battery is prevented from being discharged.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to a vehicle control method, device, vehicle controller, and vehicle. Background Technology

[0002] A PHEV (Plug-in Hybrid Electric Vehicle) is a vehicle equipped with a fuel tank and a battery. During the transportation of a PHEV, the fuel level in its tank and the charge of its battery are typically kept at low levels to prevent safety accidents such as fires caused by fuel leaks or battery thermal runaway.

[0003] However, in transit areas such as ports and warehouses, due to loading, unloading, and storage needs, transport personnel need to drive the PHEVs being transported for short distances. During this process, the PHEV is started, and its high-voltage system is activated accordingly. The power battery supplies power to the high-voltage system. At the same time, because the fuel level in the fuel tank is low, the engine cannot charge the power battery with fuel, causing the already limited power of the power battery to be consumed, and it may eventually fall into a state of depletion.

[0004] Therefore, how to control vehicles under high pressure has become an urgent problem to be solved in the industry. Summary of the Invention

[0005] This application provides a vehicle control method, device, vehicle controller, and vehicle, which can prevent the power battery from running out of power. The technical solution is as follows: On the one hand, a vehicle control method is provided, the method including; When the vehicle's high-voltage system is activated, the vehicle speed and the charge of the power battery are obtained. If both the battery level and vehicle speed meet the preset conditions, control the vehicle to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system.

[0006] In some embodiments, when the vehicle's high-voltage system is activated, acquiring the vehicle speed and the charge level of the power battery includes: When the vehicle's high-voltage system is activated and the vehicle's drive motor is enabled, the vehicle speed and the charge level of the power battery are obtained.

[0007] In some embodiments, if both the battery level and vehicle speed meet preset conditions, the vehicle is controlled to shut down the high-voltage system and prevented from restarting the high-voltage system, including: If the battery level is less than or equal to the first battery level threshold and the vehicle speed is less than the preset vehicle speed threshold, the vehicle will shut down the high-voltage system and be prohibited from restarting the high-voltage system.

[0008] In some embodiments, after controlling the vehicle to shut down the high-voltage system and preventing the vehicle from restarting the high-voltage system if both the battery level and vehicle speed meet preset conditions, the method further includes: If the vehicle is in drive or reverse gear, switch the gear to neutral.

[0009] In some embodiments, after controlling the vehicle to shut down the high-voltage system and preventing the vehicle from restarting the high-voltage system if both the battery level and vehicle speed meet preset conditions, the method further includes: In response to the vehicle's low-voltage power-on operation, the vehicle's dashboard is illuminated; Based on the dashboard output prompts, the prompts are used to indicate that the high-voltage system is prohibited from starting.

[0010] In some embodiments, after controlling the vehicle to shut down the high-voltage system and preventing the vehicle from restarting the high-voltage system if both the battery level and vehicle speed meet preset conditions, the method further includes: If the fuel level in the vehicle's fuel tank exceeds the first fuel level threshold, or the battery level exceeds the second battery level threshold, the ban on the high-voltage system will be lifted.

[0011] In some embodiments, before lifting the ban on the high-voltage system if the fuel level in the vehicle's fuel tank is greater than a first fuel level threshold, or the electrical charge is greater than a second electrical charge threshold, the method further includes: Obtain the ambient temperature; The second electrical charge threshold and the first fuel quantity threshold corresponding to the fuel quantity in the vehicle's fuel tank are determined based on the ambient temperature.

[0012] On the other hand, a vehicle control device is provided, the device comprising: The data acquisition unit is configured to acquire the vehicle speed and the power battery charge when the vehicle's high-voltage system is activated. The vehicle control unit is configured to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system if both the battery level and vehicle speed meet preset conditions.

[0013] In some embodiments, the data acquisition unit is configured to acquire the vehicle speed and the charge level of the power battery when the vehicle's high-voltage system is started and the vehicle's drive motor is enabled.

[0014] In some embodiments, the vehicle control unit is configured to control the vehicle to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system if the battery level is less than or equal to a first battery level threshold and the vehicle speed is less than a preset vehicle speed threshold.

[0015] In some embodiments, the device further includes a gear shifting unit configured to control the gear shift to neutral if the vehicle is in a forward or reverse gear.

[0016] In some embodiments, the device further includes: an instrument panel illumination unit configured to illuminate the vehicle's instrument panel in response to a low-voltage power-on operation of the vehicle; The information prompt unit is configured to output prompt information based on the instrument panel, and the prompt information is used to indicate that the high-voltage system is prohibited from starting.

[0017] In some embodiments, the apparatus further includes a prohibition release unit configured to release the prohibition on the high-voltage system if the fuel level in the fuel tank inside the vehicle is greater than a first fuel level threshold or the electrical charge is greater than a second electrical charge threshold.

[0018] In some embodiments, the apparatus further includes: a temperature acquisition unit configured to acquire ambient temperature; The threshold determination unit is configured to determine a second electrical charge threshold and a first fuel quantity threshold corresponding to the fuel quantity in the vehicle's fuel tank based on the ambient temperature.

[0019] On the other hand, a vehicle controller is provided, which includes a main control module, a processor and a memory. The memory is used to store at least one computer program, which is loaded and executed by the processor to implement the vehicle control method in the embodiments of this application.

[0020] On the other hand, a vehicle is provided, which includes a vehicle controller for executing the vehicle control method in the embodiments of this application.

[0021] On the other hand, a computer-readable storage medium is provided for storing at least one computer program, which is loaded and executed by a processor to implement the vehicle control method in the embodiments of this application.

[0022] On the other hand, a computer program product is provided, including a computer program that is executed by a processor to implement the vehicle control method in the embodiments of this application.

[0023] This application provides a vehicle control method that, when both the battery level and vehicle speed meet preset conditions, not only controls the vehicle to shut down the high-voltage system, but also prohibits the vehicle from restarting the high-voltage system. This fundamentally avoids the situation where the high-voltage system is repeatedly started, thereby repeatedly consuming the power battery's charge and preventing the power battery from running out of power. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the implementation environment of a vehicle control method according to an embodiment of this application; Figure 2 This is a flowchart of a vehicle control method provided according to an embodiment of this application; Figure 3 This is a flowchart of a vehicle control method provided according to an embodiment of this application; Figure 4 This is a flowchart of a vehicle control method provided according to an embodiment of this application; Figure 5 This is a block diagram of a vehicle control device according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a vehicle controller provided according to an embodiment of this application. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0027] In this application, the terms "first", "second", etc. are used to distinguish identical or similar items with essentially the same function. It should be understood that there is no logical or temporal dependency between "first", "second", and "nth", nor is there any limitation on the quantity or execution order.

[0028] In this application, the term "at least one" means one or more, and "multiple" means two or more.

[0029] It should be noted that the information, data (including but not limited to the amount of fuel in the fuel tank, the charge of the power battery, vehicle speed, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0030] Figure 1 This is a schematic diagram illustrating the implementation environment of a vehicle control method according to an embodiment of this application. See also... Figure 1 The implementation environment is in vehicle 101, which is equipped with fuel tank 1011, power battery 1012, engine 1013 and high voltage system 1014.

[0031] Vehicle 101 is a PHEV (Plug and Drive Electric Vehicle) with both fuel-powered and battery-powered driving modes. The fuel tank 1011 is a container in vehicle 101 used to store fuel. In fuel-powered mode, the fuel tank 1011 provides fuel to the engine 1013 to drive the vehicle or to charge the power battery 1012. The power battery 1012 is a device in vehicle 101 used to store electrical energy. In battery-powered mode, the power battery 1012 provides electrical energy to the high-voltage system 1014, enabling the high-voltage system 1014 to power the drive motor, thereby driving the vehicle. The high-voltage system 1014 mainly consists of high-voltage relays and high-voltage electrical loads, transmitting electrical energy from the power battery 1012 to the drive motor and other high-voltage electrical loads via the high-voltage relays.

[0032] Figure 2 This is a flowchart of a vehicle control method provided according to an embodiment of this application. The method is executed by the vehicle's overall controller. Figure 2 As shown, the vehicle control method includes the following steps: S201: When the vehicle's high-voltage system is activated, it acquires the vehicle's speed and the charge level of the power battery.

[0033] In this embodiment, when the vehicle's high-voltage system is activated, the vehicle speed and the charge level of the power battery are acquired. The vehicle is a PHEV (Public-Purpose Electric Vehicle). The high-voltage system refers to the general term for the electrical systems in the vehicle whose operating voltage is higher than the human body's safe voltage (60V), mainly composed of high-voltage relays, high-voltage distribution units, and high-voltage electrical loads. When the high-voltage system is activated, the high-voltage relays close, and the high-voltage electricity output from the power battery is delivered to high-voltage electrical loads such as the drive motor and electric air conditioning compressor through the high-voltage distribution unit, enabling the vehicle to drive, cool, or heat. The power battery is a device in the vehicle used to store electrical energy. The vehicle is equipped with a BMS (Battery Management System) to acquire the voltage, current, temperature, and charge level of the power battery in real time. When the high-voltage system is activated, the power battery provides electrical energy to the high-voltage system, enabling the high-voltage system to power the drive motor, thereby driving the vehicle.

[0034] It should be noted that the prerequisite for this embodiment is that the fuel level in the fuel tank is less than or equal to a second fuel level threshold. The fuel tank is a container in a vehicle used to store fuel, usually made of metal or high-strength plastic. The fuel in the fuel tank is delivered to the engine through fuel lines to provide fuel for engine starting and operation, to drive the vehicle or charge the power battery. The fuel tank is equipped with a level sensor to obtain the fuel level. When the fuel level is less than or equal to the second fuel level threshold, the engine cannot start or run normally, and therefore cannot drive the vehicle or charge the power battery. At this time, if the high-voltage system starts, the power battery needs to consume its own power to supply power to the high-voltage system. When the fuel level is greater than the second fuel level threshold, the engine can start and run normally. Even if the high-voltage system consumes power, the engine can still charge the power battery, preventing the power battery from being depleted. The second fuel level threshold is set based on whether the engine can start. When the fuel level is below a certain critical value, the engine cannot start or run normally, and this critical value can be determined as the second fuel level threshold.

[0035] Therefore, when the fuel level in the fuel tank is less than or equal to the second fuel level threshold, the activation of the vehicle's high-voltage system is determined when the high-voltage relay is detected to be closed; that is, the power battery begins to consume electricity to supply power to the high-voltage system. The battery charge level is obtained through the BMS to determine if there is a risk of battery depletion; the vehicle speed is obtained through wheel speed sensors installed at the wheels to determine if the vehicle can safely shut down the high-voltage system.

[0036] S202, if the battery level and vehicle speed both meet the preset conditions, control the vehicle to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system.

[0037] In this embodiment, the battery level and vehicle speed are determined to meet corresponding preset conditions. If both conditions are met, the vehicle's high-voltage system is shut down, and restarting the system is prohibited. The preset condition for battery level is that the battery level is less than or equal to a first battery level threshold. This threshold can be set based on whether the battery can continuously and stably supply power to the high-voltage system. When the battery level is less than or equal to this threshold, the BMS typically limits or directly prohibits the battery from outputting large currents. However, if the high-voltage system continues to operate, the battery will still output small currents, eventually leading to over-discharge and battery depletion. The preset condition for vehicle speed is that the vehicle speed is less than a preset speed threshold. This threshold is set based on whether the vehicle is in a safe and controllable low-speed state. During normal vehicle operation, suddenly shutting down the high-voltage system would cause the drive motor to lose power, and safety assistance functions such as electric steering and electric braking would be restricted, posing a serious safety hazard. Therefore, by setting a preset speed threshold, the high-voltage system is only allowed to be shut down when the vehicle is stationary or at extremely low speeds.

[0038] When both the battery level and vehicle speed meet the corresponding preset conditions, the vehicle controller determines that the vehicle is currently in a low-speed or stationary state due to insufficient battery power, which meets the safety shutdown conditions of the high-voltage system. It then generates a high-voltage shutdown command and sends it to the BMS (Battery Management System) to disconnect the high-voltage relay, thereby cutting off the power supply circuit from the battery to the high-voltage load and shutting down the high-voltage system. Simultaneously, the vehicle controller generates a high-voltage prohibition flag to prevent the high-voltage system from restarting, thus avoiding repeated starts that would continuously drain the battery.

[0039] It should be noted that after the high-voltage system is shut down and its start is prohibited, a prompt message can be displayed on the vehicle's dashboard to inform the driver that the high-voltage system is prohibited from starting and the power battery needs to be charged.

[0040] This application provides a vehicle control method that, when both the battery level and vehicle speed meet preset conditions, not only controls the vehicle to shut down the high-voltage system, but also prohibits the vehicle from restarting the high-voltage system. This fundamentally avoids the situation where the high-voltage system is repeatedly started, thereby repeatedly consuming the power battery's charge and preventing the power battery from running out of power.

[0041] The above embodiments describe controlling the vehicle to shut down the high-voltage system and preventing the vehicle from restarting the high-voltage system when both the battery level and vehicle speed meet preset conditions. Based on this, Figure 3 This is a flowchart of another vehicle control method provided according to an embodiment of this application. The method describes how, when the high-voltage system is started and the drive motor is enabled, if the high-voltage system is shut down, the vehicle's gear position still needs to be controlled. This method is executed by the vehicle's overall controller. Figure 3 As shown, the vehicle control method includes the following steps: S301 acquires the vehicle speed and battery charge when the vehicle's high-voltage system is activated and the vehicle's drive motor is enabled.

[0042] In this embodiment, when the high-voltage system is activated and the drive motor is enabled, the vehicle speed and the charge level of the power battery are acquired. The activation of the high-voltage system provides power to the drive motor, but the drive motor may not necessarily be operational; that is, the drive motor may or may not be enabled.

[0043] The drive motor is enabled when the vehicle's high-voltage system is started, the vehicle is in forward or reverse gear, and the vehicle's brake pedal is released. The vehicle controller sends a motor enable command to the motor controller, allowing the drive motor to receive electrical energy from the high-voltage system and output drive torque, thus enabling the vehicle to drive.

[0044] The drive gear (D) is for forward movement. When the transmission is in drive, the drive motor transmits power to the wheels, propelling the vehicle forward. The reverse gear (R) is for backward movement. When the transmission is in reverse, the drive motor changes the direction of power output through the reverse gear set, causing the wheels to rotate in the opposite direction, thus reversing the vehicle. The brake pedal is in the released state, meaning it is not depressed by the driver. In this state, the vehicle can move automatically or coast. The motor controller is an electronic control unit that controls the operation of the drive motor. After receiving and successfully executing the motor enable command from the vehicle controller, the motor controller sends an enable status signal back to the vehicle controller. The vehicle controller determines whether the drive motor is enabled by detecting this signal. Therefore, when the vehicle controller detects that the high-voltage relay is closed and the enable status signal from the motor controller indicates that the drive motor is enabled, it determines that the vehicle's high-voltage system is activated and the drive motor is enabled.

[0045] S302: If both the battery level and vehicle speed meet the preset conditions, control the vehicle to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system.

[0046] Please refer to step S202 for the specific process, which will not be repeated here.

[0047] S303: If the vehicle is in drive or reverse gear, switch the gear to neutral.

[0048] In this embodiment, after the vehicle's high-voltage system is shut down, the vehicle controller obtains the vehicle's current gear position. If the vehicle's gear is a forward or reverse gear, the controller switches the gear to neutral. Neutral (N gear) is the vehicle's power interruption gear. When the vehicle's transmission is in neutral, the power transmission route between the gear set inside the transmission and the wheels is cut off, and the vehicle cannot move, but can be safely towed or pulled.

[0049] Since the drive motor is enabled only when the high-voltage system is running, the vehicle is in drive or reverse, and the brake pedal is released, when the high-voltage system is shut off, the drive motor cannot output drive torque. However, the brake pedal remains released. If the vehicle is still in drive or reverse, power is transmitted between the wheels and the transmission, and the gears in the transmission are engaged. If the vehicle is towed at this time, the wheels will cause the transmission gears to rotate at high speed. However, because the drive motor is not running, the transmission oil pump cannot work, and the internal parts cannot be adequately lubricated and cooled, causing transmission damage. To prevent transmission damage and ensure vehicle safety, the gear should be shifted to neutral to cut off the power transmission path between the transmission and the wheels, while ensuring that the wheels can rotate freely, allowing the vehicle to be safely towed or pulled.

[0050] In some embodiments, after shifting the gear to neutral, the vehicle controller can output a prompt message "The current gear has been automatically shifted to N gear" through the instrument panel to inform the driver of the gear change.

[0051] This application provides a vehicle control method that, when both battery power and vehicle speed meet preset conditions, not only shuts down the high-voltage system but also prevents the vehicle from restarting the high-voltage system. This fundamentally avoids the repeated starting of the high-voltage system, which would repeatedly consume the power battery's charge and prevent the power battery from running out of power. Even when the drive motor is enabled, if the high-voltage system is shut down, the vehicle may still be in a forward or reverse gear, with power transmission between the wheels and the transmission. Forcibly dragging or pulling the vehicle could damage the transmission. To prevent transmission damage and ensure vehicle safety, the gear is shifted to neutral to cut off the power transmission path between the transmission and the wheels, while ensuring the wheels can rotate freely. This allows the vehicle to be safely dragged or pulled after the high-voltage system is shut down, rather than remaining stationary and affecting subsequent operations.

[0052] The above embodiments describe the need to shift the vehicle's gear to neutral after shutting down the high-voltage system when it is activated and the drive motor is enabled. Based on this, Figure 4 This is a flowchart of another vehicle control method provided according to an embodiment of this application. The method describes how to notify the driver that the high-voltage system is prohibited from starting after its activation is prohibited, and what the unlocking conditions are for lifting the high-voltage system's prohibition. This method is executed by the vehicle's overall controller. Figure 4 As shown, the vehicle control method includes the following steps: S401 acquires the vehicle speed and battery charge when the vehicle's high-voltage system is activated.

[0053] Please refer to step S201 for the specific process, which will not be repeated here.

[0054] S402, if the battery level is less than or equal to the first battery level threshold and the vehicle speed is less than the preset vehicle speed threshold, control the vehicle to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system.

[0055] In this embodiment, after obtaining the battery level and vehicle speed, the battery level is compared with a first battery level threshold, and the vehicle speed is compared with a preset vehicle speed threshold. If the battery level is less than or equal to the first battery level threshold, and the vehicle speed is less than the preset vehicle speed threshold, the vehicle is controlled to shut down the high-voltage system and is prohibited from restarting the high-voltage system. It should be noted that the vehicle controller generates a high-voltage prohibition flag to prevent the vehicle from restarting the high-voltage system. This high-voltage prohibition flag is stored in non-volatile memory and will not be reset due to a power outage.

[0056] In some embodiments, if at least one of the battery charge and vehicle speed does not meet the corresponding preset conditions, the vehicle does not need to shut down the high-voltage system. If the battery charge is greater than a first battery charge threshold, it is determined that the power battery still has sufficient charge reserve, and the high-voltage system can continue to operate. If the vehicle speed is greater than or equal to a preset vehicle speed threshold, it is determined that the vehicle is in motion. Forcibly shutting down the high-voltage system would result in a power interruption, posing a safety hazard. Therefore, a prompt message can be output to remind the driver to reduce the vehicle speed, thus providing the conditions for shutting down the high-voltage system and preventing the power battery from running out of power.

[0057] S403 illuminates the vehicle's dashboard in response to a low-voltage power-on operation.

[0058] In this embodiment, when the high-voltage system is prohibited from starting, if the driver starts the vehicle, the vehicle will perform a low-voltage power-on operation, and the vehicle's dashboard will still be illuminated. The low-voltage power-on operation refers to the process of waking up the vehicle's low-voltage system and starting to supply power. The low-voltage system's electrical energy comes from the vehicle's low-voltage battery. When the driver presses the start button or unlocks the door with the key, it confirms that the driver has started the vehicle. The vehicle controller is then awakened and controls the low-voltage relays in the low-voltage system to close, allowing the low-voltage battery to supply power to low-voltage electrical equipment such as the dashboard, central control screen, vehicle control system, and BMS. At this time, the vehicle's dashboard illuminates, displaying basic vehicle status information, such as the current time and total mileage. However, after detecting the high-voltage prohibition sign, the vehicle controller will not send a high-voltage power-on command to the BMS; the high-voltage system will not start, and the vehicle cannot be driven.

[0059] S404, based on the instrument panel output prompt information, the prompt information is used to indicate that the high-voltage system is prohibited from starting.

[0060] In this embodiment, after detecting a high-voltage prohibition sign, the vehicle controller outputs a prompt message based on the instrument panel to remind the driver that the high-voltage system is prohibited from starting. For example, the prompt message could be "Battery too low, high-voltage system prohibited," which not only reminds the driver that the high-voltage system is prohibited from starting but also prompts the driver to charge the power battery.

[0061] S405, acquire ambient temperature, and determine a second electric charge threshold and a first fuel quantity threshold corresponding to the fuel quantity in the vehicle's fuel tank based on the ambient temperature.

[0062] In this embodiment, after the vehicle is powered on at low voltage, the vehicle controller obtains the ambient temperature of the vehicle's environment in real time through a temperature sensor. Based on the ambient temperature, it determines a second energy threshold and a first fuel level threshold corresponding to the fuel level in the vehicle's fuel tank. Since the power battery has two sources of power—external power supply and engine charging—and engine charging requires fuel, this embodiment sets the fuel level exceeding the first fuel level threshold and the energy level exceeding the second energy threshold as unlocking conditions for lifting the high-voltage system's restrictions. When the vehicle meets at least one of these conditions, the high-voltage system's restrictions are lifted.

[0063] Since the volatility and fluidity of fuel vary at different temperatures, fuel fluidity deteriorates at low temperatures and fuel evaporation accelerates at high temperatures. In addition, the available power and discharge efficiency of the power battery decrease as the ambient temperature decreases. Therefore, in this embodiment, the first fuel quantity threshold and the second power quantity threshold are determined based on the ambient temperature.

[0064] For example, in a normal temperature environment of 10°C to 35°C, the first fuel quantity threshold can be set to 10% of the total fuel tank volume, and the second energy threshold can be set to 30% of the rated energy of the power battery; in a high temperature environment above 35°C, the fuel evaporates more and the battery heat dissipation pressure increases, so the first fuel quantity threshold can be set to 15% of the total fuel tank volume, and the second energy threshold can be set to 25% of the rated energy of the power battery; in a low temperature environment below 10°C, the fuel flow becomes worse and the available energy of the battery decreases, so the first fuel quantity threshold can be set to 15% of the total fuel tank volume, and the second energy threshold can be set to 35% of the rated energy of the power battery.

[0065] S406: If the fuel level in the vehicle's fuel tank is greater than the first fuel level threshold, or the electrical charge is greater than the second electrical charge threshold, the ban on the high-voltage system is lifted.

[0066] In this embodiment, if the fuel level in the fuel tank exceeds a first fuel level threshold, or the battery charge exceeds a second charge threshold, the prohibition on the high-voltage system is lifted. When the vehicle is in a low-voltage power-on state, the vehicle controller continuously monitors the fuel level in the fuel tank and the battery charge. It compares the fuel level with a first fuel level threshold corresponding to the ambient temperature and the battery charge with a second charge threshold corresponding to the ambient temperature. When it detects that the fuel level exceeds the first fuel level threshold or the battery charge exceeds the second charge threshold, it determines that the vehicle can safely start the high-voltage system. That is, the engine can charge the battery with fuel to support the operation of the high-voltage system, or the battery charge itself can support the operation of the high-voltage system. Therefore, the high-voltage prohibition flag stored in the non-volatile memory is reset to an invalid state, and the prohibition on the high-voltage system is lifted.

[0067] This application provides a vehicle control method that, when both the battery level and vehicle speed meet preset conditions, not only shuts down the high-voltage system but also prevents the vehicle from restarting the high-voltage system. This fundamentally avoids the repeated starting of the high-voltage system, which would repeatedly deplete the power battery and prevent battery depletion. By incorporating ambient temperature into the high-voltage system's unlocking logic, it avoids misjudgments caused by fixed fuel or battery level thresholds at extreme temperatures, preventing the high-voltage system from operating normally after unlocking. Dynamic adjustment of the thresholds ensures the accuracy of the unlocking conditions, thereby guaranteeing the high-voltage system's normal startup and operation without causing battery depletion.

[0068] Figure 5 This is a block diagram of a vehicle control device according to an embodiment of this application. The device is used to perform the steps of the vehicle control method described above, see below. Figure 5 The device includes: The data acquisition unit 501 is configured to acquire the vehicle speed and the power battery charge when the vehicle's high-voltage system is started. The vehicle control unit 502 is configured to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system if both the battery level and vehicle speed meet preset conditions.

[0069] In some embodiments, the data acquisition unit 501 is configured to acquire the vehicle speed and the power battery charge when the vehicle's high-voltage system is started and the vehicle's drive motor is enabled.

[0070] In some embodiments, the vehicle control unit 502 is configured to control the vehicle to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system if the battery level is less than or equal to a first battery level threshold and the vehicle speed is less than a preset vehicle speed threshold.

[0071] In some embodiments, the device further includes a gear shifting unit configured to control the gear shift to neutral if the vehicle is in a forward or reverse gear.

[0072] In some embodiments, the device further includes: an instrument panel illumination unit configured to illuminate the vehicle's instrument panel in response to a low-voltage power-on operation of the vehicle; The information prompt unit is configured to output prompt information based on the instrument panel, and the prompt information is used to indicate that the high-voltage system is prohibited from starting.

[0073] In some embodiments, the apparatus further includes a prohibition release unit configured to release the prohibition on the high-voltage system if the fuel level in the fuel tank inside the vehicle is greater than a first fuel level threshold or the electrical charge is greater than a second electrical charge threshold.

[0074] In some embodiments, the apparatus further includes: a temperature acquisition unit configured to acquire ambient temperature; The threshold determination unit is configured to determine a second electrical charge threshold and a first fuel quantity threshold corresponding to the fuel quantity in the vehicle's fuel tank based on the ambient temperature.

[0075] This application provides a vehicle control device that not only controls the vehicle to shut down its high-voltage system but also prevents the vehicle from restarting the high-voltage system, fundamentally avoiding the high-voltage system's drain of the power battery and preventing battery depletion. When the drive motor is enabled, if the high-voltage system is shut down, the vehicle may still be in drive or reverse gear, with power transmission between the wheels and the transmission, preventing the vehicle from being towed or pulled. To ensure vehicle safety, the gear is shifted to neutral to cut off the power transmission path between the transmission and the wheels, while ensuring the wheels can rotate freely, allowing the vehicle to be towed or pulled. By incorporating ambient temperature into the high-voltage system's unlocking logic, misjudgments caused by fixed fuel or battery level thresholds at extreme temperatures are avoided, preventing the high-voltage system from malfunctioning even after unlocking. Dynamic adjustment of the thresholds ensures the accuracy of the unlocking conditions, thereby guaranteeing the high-voltage system's normal startup and operation without causing battery depletion.

[0076] It should be noted that the vehicle control device provided in the above embodiments is only illustrated by the division of the above functional modules when running the application program. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the vehicle control device and the vehicle control method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0077] Figure 6 This is a schematic diagram of the structure of a vehicle controller provided according to an embodiment of this application.

[0078] Typically, the vehicle controller 600 includes: a main control module 601, a CAN interface 602, a hard-wired input interface 603, and a hard-wired output interface 604. The main control module 601 is connected to the CAN interface 602, the hard-wired input interface 603, and the hard-wired output interface 604, respectively.

[0079] The main control module 601 typically includes a processor and memory. The processor may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor can be implemented using at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the vehicle's screen. In some embodiments, the processor may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning. The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, a non-transitory computer-readable storage medium in the memory is used to store at least one computer program, which is executed by a processor to implement the vehicle control method provided in the method embodiments of this application.

[0080] The CAN interface 602 may include a powertrain CAN interface, a motor CAN interface, and a diagnostic CAN interface. The powertrain CAN interface is used to communicate with the vehicle's powertrain module, the motor CAN interface is used to communicate with the vehicle's motor controller, and the diagnostic CAN interface is used to communicate with diagnostic equipment.

[0081] The hard-wired input interface 603 is used to receive hard-wired control signals. The hard-wired output interface 604 is used to send control commands to the vehicle's electronic control components, causing them to perform corresponding actions. These electronic control components include a power management system, a motor controller, an on-board charger, and a body control system.

[0082] The main control module 601 can communicate with the vehicle's powertrain module, motor controller, and diagnostic equipment via the CAN interface 602, and generate control commands based on the hard-wired control signals received by the hard-wired input interface 603, so as to send the control commands to the vehicle's electronic control components via the hard-wired output interface 604.

[0083] Those skilled in the art will understand that Figure 6 The structure shown does not constitute a limitation on the vehicle controller 600, and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0084] This application also provides a computer-readable storage medium storing at least one computer program, which is loaded and executed by a processor of an electronic device to implement the operations performed by the electronic device in the vehicle control method of the above embodiments. For example, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, a floppy disk, or an optical data storage device, etc.

[0085] This application also provides a computer program product, including a computer program loaded and executed by a processor to implement the vehicle control method as described in the above embodiments.

[0086] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware, or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0087] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vehicle control method, characterized in that, The method includes: When the vehicle's high-voltage system is activated, the vehicle speed and the power battery charge are obtained. If both the battery level and the vehicle speed meet preset conditions, the vehicle is controlled to shut down the high-voltage system and is prohibited from restarting the high-voltage system.

2. The method according to claim 1, characterized in that, When the vehicle's high-voltage system is activated, acquiring the vehicle's speed and the power battery's charge includes: When the vehicle's high-voltage system is activated and the vehicle's drive motor is enabled, the vehicle's speed and the power battery charge are acquired.

3. The method according to claim 1, characterized in that, If both the battery level and the vehicle speed meet preset conditions, the system controls the vehicle to shut down the high-voltage system and prevents the vehicle from restarting the high-voltage system, including: If the battery level is less than or equal to a first battery level threshold and the vehicle speed is less than a preset vehicle speed threshold, the vehicle is controlled to shut down the high-voltage system and the vehicle is prohibited from restarting the high-voltage system.

4. The method according to claim 2, characterized in that, After controlling the vehicle to shut down the high-voltage system and preventing the vehicle from restarting the high-voltage system if both the battery level and the vehicle speed meet preset conditions, the method further includes: If the vehicle is in a forward or reverse gear, control the gear to switch to neutral.

5. The method according to claim 1, characterized in that, After controlling the vehicle to shut down the high-voltage system and preventing the vehicle from restarting the high-voltage system if both the battery level and the vehicle speed meet preset conditions, the method further includes: In response to a low-voltage power-on operation of the vehicle, the vehicle's dashboard is illuminated; Based on the prompt information output by the instrument panel, the prompt information is used to indicate that the high-voltage system is prohibited from starting.

6. The method according to claim 5, characterized in that, The method further includes: If the fuel level in the vehicle's fuel tank is greater than a first fuel level threshold, or the electrical charge is greater than a second electrical charge threshold, the ban on the high-voltage system is lifted.

7. The method according to claim 6, characterized in that, Before lifting the ban on the high-voltage system if the fuel level in the vehicle's fuel tank is greater than a first fuel level threshold, or the electrical charge is greater than a second electrical charge threshold, the method further includes: Obtain the ambient temperature; The second power threshold and the first fuel level threshold corresponding to the fuel level in the vehicle's fuel tank are determined based on the ambient temperature.

8. A vehicle control device, characterized in that, The device includes: The data acquisition unit is configured to acquire the vehicle speed and the power battery charge when the vehicle's high-voltage system is activated. The vehicle control unit is configured to control the vehicle to shut down the high-voltage system and prevent the vehicle from restarting the high-voltage system if both the battery level and the vehicle speed meet preset conditions.

9. A vehicle controller, characterized in that, The vehicle controller includes a main control module, which includes a processor and a memory. The memory is used to store at least one computer program, which is loaded by the processor and executed according to any one of claims 1 to 7.

10. A vehicle, characterized in that, The vehicle includes a vehicle controller, which is used to load and execute the vehicle control method according to any one of claims 1 to 7.

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