Hybrid vehicle working mode control method and apparatus, hybrid vehicle, and medium

Abstract

A hybrid vehicle working mode control method and apparatus, a hybrid vehicle, and a medium. The method comprises: when the hybrid vehicle is in a pure electric mode, obtaining a required power of the hybrid vehicle, a discharge power of a power battery, and a current vehicle speed and a current gradient of the hybrid vehicle; when it is detected that the required power is greater than a preset power threshold, obtaining a target power threshold on the basis of the magnitude relationship between the current vehicle speed, the current gradient, the required power, and the discharge power, so as to determine whether an engine needs to be started to provide assistance; when it is detected that the required power is greater than the target power threshold and the discharge power is less than the target power threshold, switching the working mode of the hybrid vehicle to a hybrid mode, and controlling the engine in the hybrid vehicle to be started, so as to maintain normal operation of the vehicle. Thus, the engine is started in a timely manner when the discharge capacity of the power battery is insufficient in the pure electric mode of the vehicle, thereby improving driving experience of users.

Description

Hybrid vehicle operating mode control method, device, hybrid vehicle and medium Technical Field

[0001] The present application relates to the technical field of hybrid electric vehicles, and in particular to a method and device for controlling an operating mode of a hybrid electric vehicle, a hybrid electric vehicle, and a medium. Background Art

[0002] With the rapid development of new energy technologies, user demand for hybrid vehicles is increasing. Hybrid vehicles (HEVs) operate in two main modes: pure electric (EV) and hybrid electric (HEV). In EV mode, the vehicle is driven entirely by an electric motor or battery, which consumes a lot of electricity and places a high demand on the battery. In HEV mode, the vehicle is driven by a combination of an engine, electric motor, and battery.

[0003] Intelligently switching between EV and HEV modes based on driver needs and vehicle status is crucial. Currently, intelligent switching between EV and HEV modes is often based on the vehicle's battery charge and the driver's requested torque. However, traditional control methods can cause the vehicle to switch to HEV mode even when the battery has enough discharge capacity in EV mode. This lack of rigorous control logic results in low energy efficiency, impacting the user experience.

[0004] Summary of the Invention

[0005] In view of this, the present application provides a hybrid vehicle operating mode control method, device, hybrid vehicle and medium to solve the problem that traditional control methods have low energy utilization and affect user experience.

[0006] In a first aspect, the present application provides a method for controlling a hybrid vehicle operating mode, the method comprising:

[0007] When it is detected that the hybrid vehicle enters the pure electric mode, the required power of the hybrid vehicle, the discharge power of the power battery, and the current speed and current slope of the hybrid vehicle are obtained;

[0008] When it is detected that the required power is greater than the preset power threshold, the target power threshold is obtained based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power;

[0009] When it is detected that the required power is greater than the target power threshold and the discharge power is less than the target power threshold, the operating mode of the hybrid vehicle is switched to the hybrid mode, and the engine on the hybrid vehicle is controlled to start.

[0010] When the hybrid vehicle is in pure electric mode, the system obtains the hybrid vehicle's power demand, the power battery's discharge power, and the hybrid vehicle's current speed and slope, thereby determining the driver's power demand and the battery's discharge capacity. When the power demand is detected to be greater than a preset power threshold, a target power threshold is determined based on the current vehicle speed, slope, and the relationship between the power demand and discharge power. This determines whether the engine should be started to provide power assistance at the current speed and slope. If the power demand is greater than and the discharge power is less than the target power threshold, the hybrid vehicle's operating mode is switched to hybrid mode, and the engine is started to maintain normal vehicle operation. This prevents the engine from failing to start in time due to insufficient power battery discharge capacity in pure electric mode, which could result in a user experiencing a lack of power.

[0011] In an optional embodiment, the target power threshold is obtained based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power, including:

[0012] Calculating a first power threshold based on the current vehicle speed and the current slope;

[0013] When it is detected that the required power is greater than the discharge power, and the required power is greater than the first power threshold, the first power threshold is used as the target power threshold;

[0014] When it is detected that the required power is greater than the discharged power, and both the required power and the discharged power are less than the first power threshold, a second power threshold is calculated based on the current vehicle speed and the current slope, and the second power threshold is used as the target power threshold.

[0015] By combining the relationship between the required power and the discharge power, the corresponding target power threshold is calculated according to the current vehicle speed and the current slope, so as to determine whether the battery's discharge capacity and the driver's requested power can meet the normal operation of the vehicle at the current speed and the current slope.

[0016] In an optional embodiment, after switching the operating mode of the hybrid vehicle to the hybrid mode and starting the engine of the hybrid vehicle, the method further includes:

[0017] Calculate the discharge power threshold based on the current vehicle speed;

[0018] Calculate the required power threshold based on the current vehicle speed;

[0019] When it is detected that the discharge power is greater than the discharge power threshold and the required power is less than the required power threshold, the operating mode of the hybrid vehicle is switched from the hybrid mode to the pure electric mode, and the engine on the hybrid vehicle is controlled to stop.

[0020] Therefore, when it is detected that the discharge power is greater than the discharge power threshold and the required power is less than the required power threshold, the working mode of the hybrid vehicle is switched from the hybrid mode to the pure electric mode, thereby improving energy utilization and achieving good economy.

[0021] In an optional embodiment, the method further includes:

[0022] When the detected discharge power is not greater than the discharge power threshold, or the required power is not less than the required power threshold, the operating mode of the hybrid vehicle is maintained in the hybrid mode.

[0023] Therefore, when the discharge power of the power battery has not yet recovered, the normal operation of the vehicle is ensured by maintaining the operating mode of the hybrid vehicle in the hybrid mode.

[0024] In an optional embodiment, the method further includes:

[0025] When it is detected that the required power is not greater than the target power threshold and the discharge power is not less than the target power threshold, the operating mode of the hybrid vehicle is switched to the pure electric mode.

[0026] Therefore, when the battery's discharge capacity is sufficient, energy utilization can be improved by switching the hybrid vehicle's operating mode to pure electric mode.

[0027] In an optional embodiment, the method further includes:

[0028] When it is detected that the remaining power of the power battery of the hybrid vehicle reaches a first preset power threshold, receiving a selection result of the operating mode of the hybrid vehicle input by the driver;

[0029] Based on the selection result, the operating mode of the hybrid vehicle is switched to pure electric mode or hybrid mode.

[0030] Therefore, when the remaining power of the power battery reaches a first preset power threshold, the driver is allowed to independently select the vehicle's operating mode, thereby meeting the user's diverse needs and improving the user experience.

[0031] In an optional embodiment, the method further includes:

[0032] When it is detected that the remaining power is greater than a second preset power threshold, switching the operating mode of the hybrid vehicle to a pure electric mode;

[0033] When it is detected that the remaining power is less than a third preset power threshold, switching the operating mode of the hybrid vehicle to the hybrid mode;

[0034] The first preset power threshold is greater than the third preset power threshold and less than the second preset power threshold.

[0035] This ensures smooth operation of the vehicle by automatically switching the operating mode of the hybrid vehicle according to the remaining power of the power battery.

[0036] In a second aspect, the present application provides a hybrid vehicle operating mode control device, the device comprising:

[0037] The first processing module is configured to obtain the required power of the hybrid vehicle, the discharge power of the power battery, and the current speed and current slope of the hybrid vehicle when detecting that the hybrid vehicle enters the pure electric mode;

[0038] a second processing module, configured to obtain a target power threshold based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power when it is detected that the required power is greater than the preset power threshold;

[0039] The third processing module is used to switch the operating mode of the hybrid vehicle to the hybrid mode and control the engine on the hybrid vehicle to start when it is detected that the required power is greater than the target power threshold and the discharge power is less than the target power threshold.

[0040] In an optional embodiment, the second processing module includes:

[0041] a first processing unit, configured to calculate a first power threshold based on a current vehicle speed and a current slope;

[0042] a second processing unit, configured to, when detecting that the required power is greater than the discharge power and the required power is greater than the first power threshold, use the first power threshold as the target power threshold;

[0043] The third processing unit is used to calculate a second power threshold based on the current vehicle speed and the current slope, and use the second power threshold as the target power threshold when it is detected that the required power is greater than the discharge power and both the required power and the discharge power are less than the first power threshold.

[0044] In an optional embodiment, the device further comprises:

[0045] a fourth processing module, configured to calculate a discharge power threshold based on a current vehicle speed;

[0046] a fifth processing module, configured to calculate a required power threshold based on a current vehicle speed;

[0047] The sixth processing module is used to switch the operating mode of the hybrid vehicle from the hybrid mode to the pure electric mode and control the engine of the hybrid vehicle to shut down when the detected discharge power is greater than the discharge power threshold and the required power is less than the required power threshold.

[0048] In an optional embodiment, the device further comprises:

[0049] The seventh processing module is configured to maintain the operating mode of the hybrid vehicle in the hybrid mode when the detected discharge power is not greater than the discharge power threshold, or the required power is not less than the required power threshold.

[0050] In an optional embodiment, the device further comprises:

[0051] The eighth processing module is configured to switch the operating mode of the hybrid vehicle to a pure electric mode when it is detected that the required power is not greater than the target power threshold and the discharge power is not less than the target power threshold.

[0052] In an optional embodiment, the device further comprises:

[0053] a ninth processing module, configured to receive a selection result of an operating mode of the hybrid vehicle input by a driver when it is detected that the remaining power of the power battery of the hybrid vehicle reaches a first preset power threshold;

[0054] The tenth processing module is configured to switch the operating mode of the hybrid vehicle to a pure electric mode or a hybrid mode based on the selection result.

[0055] In an optional embodiment, the device further comprises:

[0056] an eleventh processing module, configured to switch the operating mode of the hybrid vehicle to a pure electric mode when detecting that the remaining power is greater than a second preset power threshold;

[0057] a twelfth processing module, configured to switch the operating mode of the hybrid vehicle to the hybrid mode when detecting that the remaining power is less than a third preset power threshold;

[0058] The first preset power threshold is greater than the third preset power threshold and less than the second preset power threshold.

[0059] In a third aspect, the present application provides a hybrid vehicle, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to thereby execute the hybrid vehicle operating mode control method of the first aspect or any corresponding embodiment thereof.

[0060] In a fourth aspect, the present application provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the hybrid vehicle operating mode control method of the first aspect or any corresponding embodiment thereof.

[0061] The beneficial effects of this application are:

[0062] When a hybrid vehicle is in pure electric mode, the hybrid vehicle's power demand, the power discharged by the power battery, and the current speed and slope of the hybrid vehicle are acquired to determine the driver's power demand and the battery's discharge capacity. When the power demand is detected to be greater than a preset power threshold, a target power threshold is determined based on the current vehicle speed, current slope, and the relationship between the power demand and discharge power. This determines whether the engine should be started to provide power assistance at the current speed and slope. If the power demand is greater than and the discharge power is less than the target power threshold, the hybrid vehicle's operating mode is switched to hybrid mode, and the engine is controlled to start, maintaining normal vehicle operation. This prevents the engine from starting in time due to insufficient power battery discharge capacity in pure electric mode, which could result in a user experiencing a lack of power. When the battery discharge capacity recovers and the driver's demand is lower, the hybrid vehicle's operating mode is switched to pure electric mode, improving energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0064] FIG1 is a flow chart of a method for controlling a hybrid vehicle operating mode according to an embodiment of the present application;

[0065] FIG2 is a flow chart of another hybrid vehicle operating mode control method according to an embodiment of the present application;

[0066] FIG3 is a flow chart of another hybrid vehicle operating mode control method according to an embodiment of the present application;

[0067] FIG4 is a flow chart of another hybrid vehicle operating mode control method according to an embodiment of the present application;

[0068] FIG5 is a structural block diagram of a hybrid vehicle operating mode control device according to an embodiment of the present application;

[0069] FIG6 is a schematic diagram of the hardware structure of a hybrid vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0070] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0071] According to an embodiment of the present application, an embodiment of a hybrid vehicle operating mode control method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0072] In this embodiment, a hybrid vehicle operating mode control method is provided, which can be used for a hybrid vehicle that switches operating modes, such as a hybrid electric vehicle. FIG1 is a flow chart of the hybrid vehicle operating mode control method according to an embodiment of the present application. As shown in FIG1 , the flow chart includes the following steps:

[0073] Step S101 : When it is detected that the hybrid vehicle enters the pure electric mode, the required power of the hybrid vehicle, the discharge power of the power battery, and the current speed and current slope of the hybrid vehicle are obtained.

[0074] Specifically, after a hybrid vehicle enters pure electric mode (EV mode), the vehicle's hybrid control unit (PCU) can obtain the vehicle's accelerator pedal position and current speed. Based on a pre-established mapping between accelerator pedal position and power demand, the accelerator pedal position is converted to the driver's power demand. It should be noted that the PCU communicates with other vehicle sensors or modules via communication interfaces such as the CAN bus, enabling real-time monitoring of the vehicle's operating status and enabling information sharing and command transmission.

[0075] In some optional implementations, the discharge power of the power battery can be calculated by real-time monitoring of data such as voltage and current of the power battery during the discharge process.

[0076] In some optional embodiments, a slope sensor is installed on the vehicle to obtain the current slope of the ground on which the vehicle is located during operation.

[0077] Step S102 : When it is detected that the required power is greater than the preset power threshold, a target power threshold is obtained based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power.

[0078] Specifically, when the vehicle is in EV mode and the driver's power demand reaches a preset power threshold, this means the requested power may exceed the battery's discharge capacity, necessitating prompt engine startup for assist. However, there are also situations where the vehicle's power demand in EV mode reaches the preset power threshold, but the battery still has discharge capacity. In this case, there is clearly no need to start the engine for assist.

[0079] Therefore, it is necessary to combine the relationship between the required power and the discharge power as well as the operating status of the vehicle to obtain the target power threshold. By comparing the required power and the discharge power with the target power threshold, it is determined whether the engine needs to be started for power assistance to prevent the situation where the battery has the discharge capacity in EV mode but the vehicle switches to HEV mode.

[0080] It should be noted that the vehicle power demand obtained in step S101 is based on the accelerator pedal position. Strictly speaking, it represents the driver's power demand, which differs from the actual power demand required for normal vehicle operation. The vehicle's current speed and slope are both important factors in determining its actual power demand. Simply put, the faster the vehicle's speed, the greater the air and rolling resistance it must overcome, requiring more power to maintain speed. When driving on a slope, the additional force of gravity decelerates the vehicle, requiring more power to overcome this force and maintain speed. Therefore, by combining the vehicle's current speed and slope to determine a more accurate target power threshold, the decision to start the engine can be more rigorous and accurate, preventing the vehicle from switching to HEV mode when the battery is already discharged while in EV mode, resulting in poor energy efficiency.

[0081] Step S103 : when it is detected that the required power is greater than the target power threshold and the discharge power is less than the target power threshold, the operation mode of the hybrid vehicle is switched to the hybrid mode, and the engine of the hybrid vehicle is controlled to start.

[0082] Specifically, the EV mode mainly uses electricity, but in situations such as when the vehicle is driving at high speed and the throttle is increased, or the driver requests high-power driving, the power that the power battery can provide is low when the power is low. When the power requested by the driver exceeds the power that the battery can provide, if the engine assist is not started in time, it will inevitably cause insufficient power for the driver, and even the battery will continue to discharge at a high power, triggering the battery protection to limit the discharge power, thereby causing power interruption.

[0083] Therefore, when the required power is greater than the target power threshold and the discharged power is less than the target power threshold, the battery's discharge capacity is insufficient to maintain normal operation at the current vehicle speed and slope, nor is it sufficient to provide the driver's required power. At this point, the vehicle's operating mode must be switched to hybrid electric vehicle (HEV) mode, and the generator started. Simultaneously, the HEV mode is fed back to the vehicle computer and instrument panel for display. After the engine is started, the corresponding speed and torque are allocated according to HEV mode to provide driving force for the vehicle.

[0084] Specifically, when it is detected that the required power is not greater than the target power threshold and the discharge power is not less than the target power threshold, the hybrid vehicle's operating mode is switched to pure electric mode. This improves energy efficiency by switching the hybrid vehicle's operating mode to pure electric mode when the battery's discharge capacity is sufficient.

[0085] The hybrid vehicle operating mode control method provided in this embodiment obtains the hybrid vehicle's power demand, the power discharge power of the power battery, and the current vehicle speed and slope when the hybrid vehicle is in pure electric mode. This determines the driver's power demand and the battery's discharge capacity. When the power demand is detected to be greater than a preset power threshold, a target power threshold is determined based on the current vehicle speed, slope, and the relationship between the power demand and discharge power. This determines whether the engine should be started to provide power assistance at the current speed and slope. When the power demand is greater than and the discharge power is less than the target power threshold, the hybrid vehicle's operating mode is switched to hybrid mode, and the engine is controlled to start, maintaining normal vehicle operation. This prevents the engine from being started in time due to insufficient power battery discharge capacity in pure electric mode, which could result in a user experiencing a lack of power. When the battery discharge capacity recovers and the driver's demand is reduced, the hybrid vehicle's operating mode is switched to pure electric mode, improving energy efficiency.

[0086] In this embodiment, a hybrid vehicle operating mode control method is provided, which can be used for a hybrid vehicle that switches operating modes, such as a hybrid electric vehicle. FIG2 is a flow chart of the hybrid vehicle operating mode control method according to an embodiment of the present application. As shown in FIG2 , the flow chart includes the following steps:

[0087] In step S201, when it is detected that the hybrid vehicle has entered the pure electric mode, the required power of the hybrid vehicle, the discharge power of the power battery, and the current speed and current slope of the hybrid vehicle are obtained. For details, please refer to step S101 of the embodiment shown in FIG1 , which will not be repeated here.

[0088] Step S202 : When it is detected that the required power is greater than the preset power threshold, a target power threshold is obtained based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power.

[0089] Specifically, the above step S202 includes:

[0090] Step S2021: Calculate a first power threshold based on the current vehicle speed and the current slope.

[0091] Specifically, the first power threshold can be calculated based on the mapping relationship between the current vehicle speed, the current slope, and the power threshold. For example, when the driver's required power is not greater than the discharge power, that is, when the battery's discharge capacity can meet the driver's requested power, the mapping relationship between the current vehicle speed, the current slope, and the power threshold is shown in Table 1 below:

[0092] Table 1

[0093] Step S2022: When it is detected that the required power is greater than the discharge power and the required power is greater than the first power threshold, the first power threshold is used as the target power threshold.

[0094] Specifically, when the driver's requested power is not greater than the discharge power, the battery's discharge capacity can meet the driver's requested power. However, the requested power, the discharge power, and the target power threshold must still be compared to determine whether the battery's discharge capacity and the driver's requested power can meet normal vehicle operation at the current speed and slope. It should be noted that when the driver's requested power is greater than the discharge power, and the requested power is greater than the first power threshold, the first power threshold obtained in step S2021 is used as the target power threshold.

[0095] Step S2023: When it is detected that the required power is greater than the discharge power, and both the required power and the discharge power are less than the first power threshold, a second power threshold is calculated based on the current vehicle speed and the current slope, and the second power threshold is used as the target power threshold.

[0096] Specifically, another situation may arise in which the driver's required power and the power battery discharge power are both less than the first power threshold, that is, the driver's required power and the power battery discharge power cannot meet the normal operation of the vehicle at the current speed and current slope, but the driver's required power is greater than the battery discharge power. At this time, if the engine is not started in time, the driver will still feel insufficient power, which will cause the user experience to decline.

[0097] Therefore, the target power threshold for comparison needs to be adjusted so that when the power required by the driver is greater than the battery discharge power, the engine can be started in time, giving the driver a better driving experience.

[0098] For example, when the required power is greater than the discharged power, and both the required power and the discharged power are less than the first power threshold, the mapping relationship between the current vehicle speed, the current slope, and the power threshold is shown in Table 2 below:

[0099] Table 2

[0100] Therefore, by combining the relationship between the required power and the discharge power, the corresponding target power threshold is calculated according to the current vehicle speed and the current slope, so as to judge whether the battery's discharge capacity and the driver's requested power can meet the normal operation of the vehicle at the current speed and the current slope, thereby timely starting the engine.

[0101] In step S203, when it is detected that the required power is greater than the target power threshold and the discharged power is less than the target power threshold, the hybrid vehicle's operating mode is switched to hybrid mode, and the engine of the hybrid vehicle is started. For details, please refer to step S103 of the embodiment shown in FIG1 , and will not be repeated here.

[0102] Specifically, after the operating mode of the hybrid vehicle is switched to the hybrid mode and the engine of the hybrid vehicle is started, step S204 and subsequent steps may be continued.

[0103] Step S204: Calculate the discharge power threshold based on the current vehicle speed.

[0104] In some optional implementations, the discharge power threshold is calculated by mapping the current vehicle speed to the discharge power. For example, the mapping between the current vehicle speed and the discharge power is shown in Table 3 below:

[0105] Table 3

[0106] Step S205: Calculate the required power threshold based on the current vehicle speed.

[0107] In some optional implementations, the required power threshold is calculated by mapping the current vehicle speed to the required power. For example, the mapping between the current vehicle speed and the required power is shown in Table 4 below:

[0108] Table 4

[0109] Step S206 , when it is detected that the discharge power is greater than the discharge power threshold and the required power is less than the required power threshold, the operating mode of the hybrid vehicle is switched from the hybrid mode to the pure electric mode, and the engine of the hybrid vehicle is controlled to stop.

[0110] Specifically, after the vehicle switches from pure electric mode to hybrid mode, that is, from EV mode to HEV mode, the power battery's discharge power gradually recovers, at which point the vehicle can be switched back to EV mode to improve energy utilization and achieve better economy. Consequently, when it is detected that the discharge power is greater than a discharge power threshold and the demand power is less than a demand power threshold, the hybrid vehicle's operating mode is switched from HEV mode to EV mode, and the engine on the hybrid vehicle is shut down, thereby improving energy utilization and achieving better economy.

[0111] Specifically, when the detected discharge power is not greater than the discharge power threshold, or the required power is not less than the required power threshold, the hybrid vehicle's operating mode is maintained in hybrid mode. This ensures normal vehicle operation by maintaining hybrid mode even when the power battery's discharge power has not recovered.

[0112] The hybrid vehicle operating mode control method provided in this embodiment obtains the hybrid vehicle's required power, the power battery's discharge power, and the hybrid vehicle's current speed and slope when the hybrid vehicle is in pure electric mode. This determines the driver's power demand and the battery's discharge capacity. When the required power is detected to be greater than a preset power threshold, the method calculates a target power threshold based on the current vehicle speed and slope, combining the relationship between the required and discharged power. This determines whether the battery's discharge capacity and the driver's requested power can meet normal vehicle operation at the current speed and slope. When the required power is detected to be greater than and the discharged power is less than the target power threshold, the hybrid vehicle's operating mode is switched to hybrid mode, and the engine is started to maintain normal vehicle operation. This prevents the engine from starting in time due to insufficient power battery discharge capacity in pure electric mode, which could cause a user to experience a lack of power. When the battery's discharge capacity recovers and the driver's demand is reduced, the hybrid vehicle's operating mode is switched to pure electric mode, improving energy efficiency.

[0113] In this embodiment, a hybrid vehicle operating mode control method is provided, which can be used for a hybrid vehicle that switches operating modes, such as a hybrid electric vehicle. FIG3 is a flow chart of the hybrid vehicle operating mode control method according to an embodiment of the present application. As shown in FIG3 , the flow chart includes the following steps:

[0114] Step S31 : When it is detected that the remaining power of the power battery of the hybrid vehicle reaches a first preset power threshold, a selection result of the operating mode of the hybrid vehicle input by the driver is received.

[0115] Specifically, when it is detected that the remaining power of the power battery of the hybrid vehicle reaches a first preset power threshold, the driver can select EV mode or HEV mode through the vehicle computer.

[0116] In some optional embodiments, when it is detected that the remaining power is greater than a second preset power threshold, the operating mode of the hybrid vehicle is switched to a pure electric mode, at which time the vehicle is controlled to automatically enter the EV mode, and this mode is fed back to the vehicle computer and the instrument for display; when it is detected that the remaining power is less than a third preset power threshold, the operating mode of the hybrid vehicle is switched to a hybrid mode, at which time the EV mode is automatically exited, and the HEV mode is fed back to the vehicle computer and the instrument for display.

[0117] It should be noted that the first preset power threshold is greater than the third preset power threshold and less than the second preset power threshold. The first preset power threshold, the second preset power threshold, and the third preset power threshold can all be set based on factors such as ambient temperature, power battery temperature, altitude, and slope.

[0118] This ensures smooth operation of the vehicle by automatically switching the operating mode of the hybrid vehicle according to the remaining power of the power battery.

[0119] Step S32: switching the operating mode of the hybrid vehicle to a pure electric mode or a hybrid mode based on the selection result.

[0120] Therefore, when the remaining power of the power battery reaches a first preset power threshold, the driver is allowed to independently select the vehicle's operating mode, thereby meeting the user's diverse needs and improving the user experience.

[0121] In step S301, when it is detected that the hybrid vehicle has entered the pure electric mode, the required power of the hybrid vehicle, the discharge power of the power battery, and the current speed and current slope of the hybrid vehicle are obtained. For details, please refer to step S201 of the embodiment shown in FIG2 , which will not be repeated here.

[0122] In step S302, when it is detected that the required power is greater than the preset power threshold, a target power threshold is obtained based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power. For details, please refer to step S202 of the embodiment shown in FIG2 , which will not be repeated here.

[0123] In step S303, when it is detected that the required power is greater than the target power threshold and the discharged power is less than the target power threshold, the hybrid vehicle's operating mode is switched to hybrid mode, and the engine of the hybrid vehicle is started. For details, please refer to step S203 of the embodiment shown in FIG. 2 , and will not be repeated here.

[0124] The hybrid vehicle operating mode control method provided in this embodiment obtains the hybrid vehicle's power demand, the power discharge power of the power battery, and the current vehicle speed and slope when the hybrid vehicle is in pure electric mode. This determines the driver's power demand and the battery's discharge capacity. When the power demand is detected to be greater than a preset power threshold, a target power threshold is determined based on the current vehicle speed, slope, and the relationship between the power demand and discharge power. This determines whether the engine should be started to provide power assistance at the current speed and slope. When the power demand is greater than and the discharge power is less than the target power threshold, the hybrid vehicle's operating mode is switched to hybrid mode, and the engine is controlled to start, maintaining normal vehicle operation. This prevents the engine from being started in time due to insufficient power battery discharge capacity in pure electric mode, which could result in a user experiencing a lack of power. When the battery discharge capacity recovers and the driver's demand is reduced, the hybrid vehicle's operating mode is switched to pure electric mode, improving energy efficiency.

[0125] In addition, the hybrid vehicle's operating mode is automatically switched according to the remaining power of the power battery to ensure smooth operation of the vehicle. When the remaining power of the power battery reaches a first preset power threshold, the driver is allowed to independently select the vehicle's operating mode to meet the user's diverse needs.

[0126] The hybrid vehicle operating mode control method of the embodiment of the present application is further described below with reference to a specific application example. As shown in FIG4 , the specific application example includes the following steps:

[0127] Step 1: When the SOC (remaining power) of the power battery is greater than the second preset power threshold for automatically entering the EV mode, the vehicle automatically enters the EV mode and feeds this mode back to the vehicle computer and instrument for display.

[0128] Step 2: When the SOC of the power battery reaches a first preset power threshold that allows the user to independently select the vehicle operating mode, the driver can select EV mode or HEV mode through the vehicle computer.

[0129] Step 3: When the driver selects EV mode, the vehicle's hybrid control unit (PCU) obtains the vehicle's accelerator pedal opening and current speed. Based on the pre-established mapping relationship between accelerator pedal opening and required power, the accelerator pedal opening is converted to obtain the driver's required power and the power battery's discharge power. This is divided into the following two scenarios:

[0130] Scenario 1: When the driver's power demand is large, that is, greater than the preset power threshold, the first power threshold is calculated based on the current vehicle speed, current slope, and the mapping relationship in Table 1 above. When the demanded power is greater than and the discharge power is less than the first power threshold, the vehicle switches to HEV mode, starts the engine, and feeds the HEV mode back to the vehicle computer and instrument panel for display.

[0131] Scenario 2: The driver's power demand and the battery's discharge power are both less than the first power threshold, but greater than the battery's discharge power. If the engine isn't started promptly, the driver will experience a sense of insufficient power. Therefore, a second power threshold is calculated based on the current vehicle speed, current slope, and the mapping relationship in Table 2. When both the demanded power and the discharged power are less than the second power threshold, the vehicle switches to HEV mode, starts the engine, and displays the HEV mode on the vehicle's computer and instrument panel. After the engine starts, the speed and torque allocated according to HEV mode are used to provide driving force.

[0132] Step 4: When the battery discharge power returns to the discharge power threshold and the driver's required power is less than the required power threshold, and the duration is greater than the set value, the vehicle's operating mode is switched from HEV to EV mode, the engine is controlled to stop, and the EV mode is fed back to the vehicle computer and instrument for display.

[0133] Step 5: When the SOC of the power battery is less than the third preset power threshold for automatically exiting the EV mode, the vehicle automatically exits the EV mode, switches to the HEV mode, and feeds back this mode to the vehicle computer and instrument for display.

[0134] The hybrid vehicle operating mode control method provided in this application enables intelligent switching between EV and HEV modes when the driver selects EV mode. When the battery discharge power in EV mode is insufficient and the engine needs to be started, the mode is switched to HEV mode. Once the power battery discharge power recovers after entering HEV mode, the HEV mode is intelligently switched back to EV mode. This application incorporates the judgment of battery discharge power and driver power demand during EV and HEV mode switching, achieving excellent dynamic driving performance and economy.

[0135] This embodiment also provides a hybrid vehicle operating mode control device for implementing the aforementioned embodiments and optional implementations. Details already described will not be repeated. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation using hardware, or a combination of software and hardware, is also possible and contemplated.

[0136] This embodiment provides a hybrid vehicle operating mode control device, as shown in FIG5 , including:

[0137] The first processing module 501 is configured to obtain the required power of the hybrid vehicle, the discharge power of the power battery, and the current speed and current slope of the hybrid vehicle when detecting that the hybrid vehicle enters the pure electric mode;

[0138] The second processing module 502 is configured to obtain a target power threshold based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power when it is detected that the required power is greater than the preset power threshold;

[0139] The third processing module 503 is configured to switch the operating mode of the hybrid vehicle to the hybrid mode and control the engine of the hybrid vehicle to start when it is detected that the required power is greater than the target power threshold and the discharge power is less than the target power threshold.

[0140] In an optional embodiment, the second processing module includes:

[0141] a first processing unit, configured to calculate a first power threshold based on a current vehicle speed and a current slope;

[0142] a second processing unit, configured to, when detecting that the required power is greater than the discharge power and the required power is greater than the first power threshold, use the first power threshold as the target power threshold;

[0143] The third processing unit is used to calculate a second power threshold based on the current vehicle speed and the current slope, and use the second power threshold as the target power threshold when it is detected that the required power is greater than the discharge power and both the required power and the discharge power are less than the first power threshold.

[0144] In an optional embodiment, the device further comprises:

[0145] a fourth processing module, configured to calculate a discharge power threshold based on a current vehicle speed;

[0146] a fifth processing module, configured to calculate a required power threshold based on a current vehicle speed;

[0147] The sixth processing module is used to switch the operating mode of the hybrid vehicle from the hybrid mode to the pure electric mode and control the engine of the hybrid vehicle to shut down when the detected discharge power is greater than the discharge power threshold and the required power is less than the required power threshold.

[0148] In an optional embodiment, the device further comprises:

[0149] The seventh processing module is configured to maintain the operating mode of the hybrid vehicle in the hybrid mode when the detected discharge power is not greater than the discharge power threshold, or the required power is not less than the required power threshold.

[0150] In an optional embodiment, the device further comprises:

[0151] The eighth processing module is configured to switch the operating mode of the hybrid vehicle to a pure electric mode when it is detected that the required power is not greater than the target power threshold and the discharge power is not less than the target power threshold.

[0152] In an optional embodiment, the device further comprises:

[0153] a ninth processing module, configured to receive a selection result of an operating mode of the hybrid vehicle input by a driver when it is detected that the remaining power of the power battery of the hybrid vehicle reaches a first preset power threshold;

[0154] The tenth processing module is configured to switch the operating mode of the hybrid vehicle to a pure electric mode or a hybrid mode based on the selection result.

[0155] In an optional embodiment, the device further comprises:

[0156] an eleventh processing module, configured to switch the operating mode of the hybrid vehicle to a pure electric mode when detecting that the remaining power is greater than a second preset power threshold;

[0157] a twelfth processing module, configured to switch the operating mode of the hybrid vehicle to the hybrid mode when detecting that the remaining power is less than a third preset power threshold;

[0158] The first preset power threshold is greater than the third preset power threshold and less than the second preset power threshold.

[0159] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0160] The hybrid vehicle operating mode control device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0161] An embodiment of the present application further provides a hybrid vehicle having the hybrid vehicle operating mode control device shown in FIG. 5 .

[0162] Please refer to Figure 6, which is a schematic diagram of the structure of a hybrid vehicle provided by an optional embodiment of the present application. As shown in Figure 6, the hybrid vehicle includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed within the hybrid vehicle, including instructions stored in or on the memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used with multiple memories and multiple memories. Similarly, multiple devices can be connected, each device providing some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 6 takes a processor 10 as an example.

[0163] The processor 10 may be a central processing unit (CPU), a network processor (NPU), or a combination thereof. The processor 10 may also include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device (PLD) may be a complex programmable logic device (CPLD), a field programmable gate array (FPGA), a general purpose array logic (GAL), or any combination thereof.

[0164] The memory 20 stores instructions that can be executed by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0165] The memory 20 may include a program storage area and a data storage area. The program storage area may store an operating system and applications required for at least one function; the data storage area may store data generated based on the use of the hybrid vehicle. Furthermore, the memory 20 may include high-speed random access memory (RAM) and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some optional embodiments, the memory 20 may optionally include memory located remotely from the processor 10. Such remote memory may be connected to the hybrid vehicle via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network (LAN), a mobile communication network, and combinations thereof.

[0166] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0167] The hybrid vehicle further includes a communication interface 30 for the hybrid vehicle to communicate with other devices or a communication network.

[0168] The embodiments of the present application also provide a computer-readable storage medium. The above-mentioned method according to the embodiment of the present application can be implemented in hardware, firmware, or implemented as a computer code that can be recorded in a storage medium, or implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and downloaded through a network and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state drive, etc.; optionally, the storage medium can also include a combination of the above-mentioned types of memory. It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor or hardware, the method shown in the above embodiment is implemented.

[0169] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A hybrid vehicle operating mode control method, characterized in that: The method comprises: When it is detected that the hybrid vehicle enters the pure electric mode, obtaining the required power of the hybrid vehicle, the discharge power of the power battery, and the current speed and current slope of the hybrid vehicle; When it is detected that the required power is greater than a preset power threshold, a target power threshold is obtained based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power; When it is detected that the required power is greater than the target power threshold and the discharge power is less than the target power threshold, the operating mode of the hybrid vehicle is switched to a hybrid mode, and the engine of the hybrid vehicle is controlled to start.

2. The method according to claim 1, characterized in that The obtaining of the target power threshold based on the current vehicle speed, the current slope, and the relationship between the required power and the discharge power includes: Calculating a first power threshold based on the current vehicle speed and the current slope; When it is detected that the required power is greater than the discharge power, and the required power is greater than the first power threshold, using the first power threshold as the target power threshold; When it is detected that the required power is greater than the discharge power, and both the required power and the discharge power are less than the first power threshold, a second power threshold is calculated based on the current vehicle speed and the current slope, and the second power threshold is used as the target power threshold.

3. The method according to claim 2, characterized in that After switching the operating mode of the hybrid vehicle to the hybrid mode and starting the engine of the hybrid vehicle, the method further includes: Calculating a discharge power threshold based on the current vehicle speed; Calculating a required power threshold based on the current vehicle speed; When it is detected that the discharge power is greater than the discharge power threshold and the required power is less than the required power threshold, the operating mode of the hybrid vehicle is switched from the hybrid mode to the pure electric mode, and the engine of the hybrid vehicle is controlled to stop.

4. The method according to claim 3, characterized in that The method further comprises: When it is detected that the discharge power is not greater than the discharge power threshold, or the required power is not less than the required power threshold, the operating mode of the hybrid vehicle is maintained at the hybrid mode.

5. The method according to claim 1, wherein The method further comprises: When it is detected that the required power is not greater than the target power threshold and the discharge power is not less than the target power threshold, the operating mode of the hybrid vehicle is switched to a pure electric mode.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: When it is detected that the remaining power of the power battery of the hybrid vehicle reaches a first preset power threshold, receiving a selection result of the operating mode of the hybrid vehicle input by the driver; The operating mode of the hybrid vehicle is switched to a pure electric mode or a hybrid mode based on the selection result.

7. The method according to claim 6, characterized in that The method further comprises: When it is detected that the remaining power is greater than a second preset power threshold, switching the operating mode of the hybrid vehicle to a pure electric mode; When it is detected that the remaining power is less than a third preset power threshold, switching the operating mode of the hybrid vehicle to a hybrid mode; The first preset power threshold is greater than the third preset power threshold and less than the second preset power threshold.

8. A hybrid vehicle operating mode control device, characterized in that: The device comprises: a first processing module, configured to obtain, when detecting that the hybrid vehicle enters a pure electric mode, the required power of the hybrid vehicle, the discharge power of the power battery, and the current speed and current slope of the hybrid vehicle; a second processing module, configured to, when detecting that the required power is greater than a preset power threshold, obtain a target power threshold based on the current vehicle speed, the current slope, and a magnitude relationship between the required power and the discharge power; The third processing module is configured to switch the operating mode of the hybrid vehicle to a hybrid mode and control the engine of the hybrid vehicle to start when it is detected that the required power is greater than the target power threshold and the discharge power is less than the target power threshold.

9. The device according to claim 8, characterized in that The second processing module includes: a first processing unit, configured to calculate a first power threshold based on the current vehicle speed and the current slope; a second processing unit, configured to, when detecting that the required power is greater than the discharge power and the required power is greater than the first power threshold, use the first power threshold as a target power threshold; The third processing unit is used to calculate a second power threshold based on the current vehicle speed and the current slope, and use the second power threshold as the target power threshold when it is detected that the required power is greater than the discharge power and both the required power and the discharge power are less than the first power threshold.

10. The device according to claim 9, characterized in that The device further comprises: a fourth processing module, configured to calculate a discharge power threshold based on the current vehicle speed; a fifth processing module, configured to calculate a required power threshold based on the current vehicle speed; The sixth processing module is used to switch the operating mode of the hybrid vehicle from the hybrid mode to the pure electric mode and control the engine of the hybrid vehicle to stop when it is detected that the discharge power is greater than the discharge power threshold and the required power is less than the required power threshold.

11. The device according to claim 10, characterized in that The device further comprises: The seventh processing module is configured to maintain the operating mode of the hybrid vehicle in the hybrid mode when detecting that the discharge power is not greater than the discharge power threshold, or the required power is not less than the required power threshold.

12. The device according to claim 8, characterized in that The device further comprises: An eighth processing module is configured to switch the operating mode of the hybrid vehicle to a pure electric mode when it is detected that the required power is not greater than the target power threshold and the discharge power is not less than the target power threshold.

13. The device according to any one of claims 8 to 12, characterized in that The device further comprises: The ninth processing module is configured to, when detecting that the remaining power of the power battery of the hybrid vehicle reaches a first preset power threshold, receiving a selection result of an operating mode of the hybrid vehicle input by a driver; A tenth processing module is configured to switch the operating mode of the hybrid vehicle to a pure electric mode or a hybrid mode based on the selection result.

14. The device according to claim 13, characterized in that The device further comprises: an eleventh processing module, configured to switch the operating mode of the hybrid vehicle to a pure electric mode when detecting that the remaining power is greater than a second preset power threshold; a twelfth processing module, configured to switch the operating mode of the hybrid vehicle to a hybrid mode when detecting that the remaining power is less than a third preset power threshold; The first preset power threshold is greater than the third preset power threshold and less than the second preset power threshold.

15. A hybrid vehicle, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the hybrid vehicle operating mode control method according to any one of claims 1 to 7 by executing the computer instructions.

16. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the hybrid vehicle operating mode control method according to any one of claims 1 to 7.

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