MÉTODO E APARELHO DE CONTROLE PARA MODOS OPERACIONAIS DE VEÍCULO ELÉTRICO HÍBRIDO, VEÍCULO ELÉTRICO HÍBRIDO E MEIO

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

1 / 35 METHOD AND CONTROL DEVICE FOR OPERATING MODES OF HYBRID ELECTRIC VEHICLE, HYBRID ELECTRIC VEHICLE AND ENVIRONMENT Technical field

[001] The present application relates to the field of hybrid electric vehicle technologies and specifically to a method and apparatus for controlling operating modes of a hybrid electric vehicle, a hybrid electric vehicle and a means. Background

[002] With the rapid advancement of new energy technologies, user demand for hybrid electric vehicles has been gradually increasing. Hybrid electric vehicles operate primarily in two modes: Electric Vehicle (EV) mode and Hybrid Electric Vehicle (HEV) mode. In EV mode, the vehicle is powered solely by an electric motor or a traction battery, which consumes electricity at a high rate and imposes a specific requirement on the battery's state of charge. In HEV mode, the vehicle is powered jointly by the combustion engine, the electric motor, and the traction battery.

[003] Intelligent switching between EV and HEV modes based on driver demand and vehicle status is extremely significant. Currently, EV and HEV modes are generally switched intelligently based on the vehicle's traction battery charge state and the torque demanded by a driver. However, in conventional control methods, the vehicle switches to HEV mode even when the battery retains sufficient discharge capacity in EV mode. This reflects insufficiently rigorous control logic, resulting in suboptimal energy utilization and a compromised user experience. Summary Petition 870250070038, dated 06 / 08 / 2025, page 20 / 66 2 / 35

[004] In view of this, the present application provides a control method and apparatus for operating modes of a hybrid electric vehicle, a hybrid electric vehicle and a means, to solve the problem that conventional control methods have suboptimal energy utilization and compromised user experience.

[005] According to a first aspect, the present application provides a control method for operating modes of a hybrid electric vehicle. The method includes: When it is detected that a hybrid electric vehicle enters Electric Vehicle mode, acquire a power demand from the hybrid electric vehicle, a discharge power from a traction battery, and a current vehicle speed and current gradient of the hybrid electric vehicle; When it is detected that the power demand is greater than a predefined power threshold, determine a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the power demand and the discharge power; and when it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, switch an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and control a combustion engine in the hybrid electric vehicle to activate.

[006] Thus, when the hybrid electric vehicle is in Electric Vehicle mode, the power demand of the hybrid electric vehicle, the discharge power of the traction battery, and the current vehicle speed and current gradient of the hybrid electric vehicle are acquired to learn a driver's power demand and battery discharge capacity. When it is detected that the power demand is greater than the power threshold Petition 870250070038, dated 06 / 08 / 2025, page 21 / 66 In the 3 / 35 preset, the target power threshold is determined based on the current vehicle speed, current gradient, and the relative magnitude between demanded power and discharge power, to determine if the combustion engine needs to be activated to provide power assistance at the current vehicle speed and current gradient. When it is detected that the demanded power is greater than the target power threshold and the discharge power is less than the target power threshold, the hybrid electric vehicle's operating mode is switched to Hybrid Electric Vehicle mode, and the combustion engine in the hybrid electric vehicle is controlled to activate, to maintain normal vehicle operation, thus preventing a user from perceiving insufficient power because the traction battery's discharge capacity is insufficient in the vehicle's Electric Vehicle mode but the combustion engine fails to activate in time.

[007] In an optional embodiment, the step of determining a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the power demand and the discharge power includes: Calculate an initial power threshold based on the current vehicle speed and current gradient; When it is detected that the power demand is greater than the discharge power and the power demand is greater than the first power threshold, adjust the first power threshold as the target power threshold; and when it is detected that the power demand is greater than the discharge power and both the power demand and the discharge power are less than the first power threshold, calculate a second power threshold based on the current vehicle speed and current gradient, and adjust the second power threshold as the target power threshold. Petition 870250070038, dated 06 / 08 / 2025, page 22 / 66 4 / 35

[008] In this way, the corresponding target power threshold is calculated based on the current vehicle speed and current gradient in combination with the relative magnitude between the power demand and the discharge power, thus facilitating the determination of whether the battery discharge capacity and the driver's power demand can meet the normal operation of the vehicle at the current vehicle speed and current gradient.

[009] In an optional embodiment, after the step of switching from an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and controlling a combustion engine in the hybrid electric vehicle to activate, the method additionally includes: Calculate a discharge power threshold based on the current vehicle speed; Calculate a demand power threshold based on the current vehicle speed; and when it is detected that the discharge power is greater than the discharge power threshold and the demand power is less than the demand power threshold, switch the operating mode of the hybrid electric vehicle from Hybrid Electric Vehicle mode to Electric Vehicle mode and turn off the combustion engine in the hybrid electric vehicle.

[010] In this way, when it is detected that the discharge power is greater than the discharge power threshold and the power demand is less than the power demand threshold, the operating mode of the hybrid electric vehicle is switched from Hybrid Electric Vehicle mode to Electric Vehicle mode, thus improving energy use and achieving superior fuel economy.

[011] In an optional embodiment, the method additionally includes: when it is detected that the discharge power is not greater than the threshold Petition 870250070038, dated 06 / 08 / 2025, page 23 / 66 If the discharge power is 5 / 35 or the power demand is not less than the power demand threshold, maintain the hybrid electric vehicle operating mode in Hybrid Electric Vehicle mode.

[012] In this way, when the discharge power of the traction battery has not yet been recovered, the operating mode of the hybrid electric vehicle is maintained in Hybrid Electric Vehicle mode to ensure normal vehicle operation.

[013] In an optional version, the method additionally includes: When it is detected that the power demand is not greater than the target power threshold and the discharge power is not less than the target power threshold, switch the hybrid electric vehicle's operating mode to Electric Vehicle mode.

[014] In this way, when the battery discharge capacity is sufficient, the operating mode of the hybrid electric vehicle is switched to Electric Vehicle mode, thus improving power utilization.

[015] In an optional version, the method additionally includes: When it is detected that the remaining charge state of the traction battery in the hybrid electric vehicle reaches a first predefined charge state threshold, receive a driver selection input for the hybrid electric vehicle's operating mode; and switch the hybrid electric vehicle's operating mode to Electric Vehicle mode or Hybrid Electric Vehicle mode based on the selection result.

[016] In this way, when the remaining state of charge of the traction battery reaches the first predefined state of charge threshold, the driver is allowed to select the vehicle's operating mode to meet the various user requirements, thereby improving the user experience. Petition 870250070038, dated 06 / 08 / 2025, page 24 / 66 6 / 35

[017] In an optional version, the method additionally includes: When it is detected that the remaining state of charge is greater than a second predefined state of charge threshold, switch the hybrid electric vehicle's operating mode to Electric Vehicle mode; and when it is detected that the remaining state of charge is less than a third predefined state of charge threshold, switch the hybrid electric vehicle's operating mode to Hybrid Electric Vehicle mode, in which the first predefined state of charge threshold is greater than the third predefined state of charge threshold and is less than the second predefined state of charge threshold.

[018] In this way, the operating mode of the hybrid electric vehicle is switched automatically based on the remaining charge state of the traction battery, thus ensuring smooth vehicle operation.

[019] According to a second aspect, the present application provides a control device for operating modes of a hybrid electric vehicle, wherein the device includes: A first processing module, configured to: when it is detected that a hybrid electric vehicle enters Electric Vehicle mode, acquire a power demand from the hybrid electric vehicle, a discharge power from a traction battery, and a current vehicle speed and current gradient of the hybrid electric vehicle; a second processing module, configured to: when it is detected that the power demand is greater than a predefined power threshold, determine a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the power demand and the discharge power; and a third processing module, configured to: when it is Petition 870250070038, dated 06 / 08 / 2025, page 25 / 66 7 / 35 detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, switch an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and control a combustion engine in the hybrid electric vehicle to activate.

[020] In an optional configuration, the second processing module includes: a first processing unit, configured to calculate an initial power threshold based on the current vehicle speed and current gradient; A second processing unit, configured to: when it is detected that the power demand is greater than the discharge power and the power demand is greater than the first power threshold, adjust the first power threshold as the target power threshold; and a third processing unit, configured to: when it is detected that the power demand is greater than the discharge power and both the power demand and the discharge power are less than the first power threshold, calculate a second power threshold based on the current vehicle speed and current gradient, and adjust the second power threshold as the target power threshold.

[021] In an optional configuration, the device additionally includes: 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 demand power threshold based on the current vehicle speed; and a sixth processing module, configured to: when it is detected that the discharge power is greater than the discharge power threshold and the demand power is less than the demand power threshold, Petition 870250070038, dated 06 / 08 / 2025, page 26 / 66 8 / 35 Switch the operating mode of the hybrid electric vehicle from Hybrid Electric Vehicle mode to Electric Vehicle mode and turn off the combustion engine in the hybrid electric vehicle.

[022] In an optional configuration, the device additionally includes: A seventh processing module, configured to: when it is detected that the discharge power is not greater than the discharge power threshold or the power demand is not less than the power demand threshold, maintain the hybrid electric vehicle's operating mode in Hybrid Electric Vehicle mode.

[023] In an optional configuration, the device additionally includes: An eighth processing module, configured to: when it is detected that the power demand is not greater than the target power threshold and the discharge power is not less than the target power threshold, switch the operating mode of the hybrid electric vehicle to Electric Vehicle mode.

[024] In an optional configuration, the device additionally includes: A ninth processing module, configured to: when it is detected that a remaining state of charge of the traction battery in the hybrid electric vehicle reaches a first predefined state of charge threshold, receive a selection input from the driver for the hybrid electric vehicle's operating mode; and a tenth processing module, configured to switch the hybrid electric vehicle's operating mode to Electric Vehicle mode or Hybrid Electric Vehicle mode based on the selection result.

[025] In an optional configuration, the device additionally includes: an eleventh processing module, configured to: when it is detected that the remaining state of charge is greater than a second predefined state of charge threshold, switch the electric vehicle's operating mode. Petition 870250070038, dated 06 / 08 / 2025, page 27 / 66 9 / 35 hybrid for Electric Vehicle mode; and a twelfth processing module, configured to: when it is detected that the remaining state of charge is less than a third predefined state of charge threshold, switch the operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode, in which the first predefined state of charge threshold is greater than the third predefined state of charge threshold and is less than the second predefined state of charge threshold.

[026] According to a third aspect, the present application provides a hybrid electric vehicle, including: 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 performs, when executing the computer instructions, the control method for operating modes of a hybrid electric vehicle in the first aspect above or any corresponding embodiment thereof.

[027] According to a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium has computer instructions stored therein, and the computer instructions are configured to enable a computer to perform the control method for operating modes of a hybrid electric vehicle in the first preceding aspect or any corresponding embodiment thereof.

[028] The beneficial effects of this application are as follows: When the hybrid electric vehicle is in Electric Vehicle mode, the power demand of the hybrid electric vehicle, the discharge power of a traction battery, and the current vehicle speed and current gradient of the hybrid electric vehicle are acquired to learn a power demand of a Petition 870250070038, dated 06 / 08 / 2025, page 28 / 66 10 / 35 driver and battery discharge capacity. When it is detected that the power demand is greater than the preset power threshold, the target power threshold is determined based on the current vehicle speed, current gradient, and the relative magnitude between the power demand and the discharge power, to determine if the combustion engine needs to be activated to provide power assistance at the current vehicle speed and current gradient.When it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, the hybrid electric vehicle's operating mode is switched to Hybrid Electric Vehicle mode, and the combustion engine in the hybrid electric vehicle is controlled to activate, to maintain normal vehicle operation, thus preventing the user from perceiving insufficient power because the traction battery's discharge capacity is insufficient in the vehicle's Electric Vehicle mode but the combustion engine fails to activate in time. When the battery's discharge capacity is recovered and the driver's demand is low, the hybrid electric vehicle's operating mode is switched to Electric Vehicle mode, thus improving energy utilization. Brief Description of the Drawings

[029] To describe the technical solutions in specific embodiments of the present application or the state of the art more clearly, the attached drawings necessary to describe the specific embodiments or the state of the art are briefly presented below. Apparently, the attached drawings in the following description show some embodiments of the present application, and a person with ordinary skill in the art can still derive other drawings from these attached drawings without creative effort.

[030] FIG. 1 is a schematic flowchart of a control method for operating modes of a hybrid electric vehicle according to a Petition 870250070038, dated 06 / 08 / 2025, page 29 / 66 11 / 35 modality of the present request; FIG. 2 is a schematic flowchart of another control method for operating modes of a hybrid electric vehicle according to an embodiment of the present application; FIG. 3 is a schematic flowchart of yet another control method for operating modes of a hybrid electric vehicle according to an embodiment of the present application; FIG. 4 is a schematic flowchart of yet another control method for operating modes of a hybrid electric vehicle according to an embodiment of the present application; FIG. 5 is a structural block diagram of a control device for operating modes of a hybrid electric vehicle according to an embodiment of the present application; and FIG. 6 is a schematic diagram of a hardware structure of a hybrid electric vehicle according to an embodiment of the present application. Detailed Description

[031] To make the objectives, technical solutions and embodiments advantages of the present application clearer, the technical solutions in embodiments of the present application are described clearly and completely below with reference to the attached drawings in embodiments of the present application. It is clear that the embodiments described are only some, and not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on embodiments of the present application, without creative efforts, will be within the scope of protection of the present application.

[032] In accordance with the embodiments of the present application, an embodiment of a control method for operating modes of a hybrid electric vehicle is provided. It is necessary to note that the steps illustrated in Petition 870250070038, dated 06 / 08 / 2025, page 30 / 66 12 / 35 flowcharts of the attached drawings can be implemented in a computer system, such as a set of computer-executable instructions, and although a logical sequence is shown in the flowchart, in some cases the steps shown or described may be performed in a different order than that shown in the present invention.

[033] A control method for operating modes of a hybrid electric vehicle is provided in this embodiment and is applicable to hybrid electric vehicles with operating mode switching. FIG. 1 is a flowchart of a control method for operating modes of a hybrid electric vehicle according to an embodiment of the present application. As shown in FIG. 1, the method includes the following steps.

[034] Step S101. When it is detected that a hybrid electric vehicle enters Electric Vehicle mode, acquire a power demand of the hybrid electric vehicle, a discharge power of a traction battery, and a current vehicle speed and current gradient of the hybrid electric vehicle.

[035] Specifically, after the hybrid electric vehicle enters Electric Vehicle mode, i.e., EV mode, an accelerator pedal position and the vehicle's current speed can be acquired via a hybrid PCU power control unit in the vehicle. The accelerator pedal position is then converted according to a pre-established mapping relationship between an accelerator pedal position and a power demand to determine the power demanded by a driver. It is important to note that the hybrid PCU power control unit communicates with other vehicle sensors or modules via communication interfaces, such as a CAN bus, to monitor the vehicle's operational status in real time, thus achieving information sharing and command transmission. Petition 870250070038, dated 06 / 08 / 2025, page 31 / 66 13 / 35

[036] In some optional modes, the traction battery discharge power can be calculated by monitoring data such as traction battery voltage and current in a real-time discharge process.

[037] In some optional embodiments, the actual ground gradient in a vehicle operating process is determined by installing a gradient sensor in the vehicle.

[038] Step S102. When it is detected that the power demand is greater than a predefined power threshold, determine a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the power demand and the discharge power.

[039] Specifically, when the vehicle is in EV mode and the power demanded by the driver is high and reaches the predefined power threshold, this indicates that the power demanded by the driver may exceed the battery's discharge capacity, and a combustion engine needs to be activated in time for power assistance. However, while the power demanded by the vehicle in EV mode reaches the predefined power threshold, the battery may still have discharge capacity. In this case, it is clearly not necessary to activate the combustion engine for power assistance.

[040] Therefore, the target power threshold needs to be determined by combining the relative magnitude between the power demand and the discharge power and the vehicle's operating status. The power demand and the discharge power are compared to the target power threshold to determine if the combustion engine needs to be activated for power assistance, thus avoiding the case where the vehicle in EV mode is switched to HEV mode when the battery has discharge capacity.

[041] It is important to note that the vehicle power demand acquired in step S101 is determined based on the accelerator pedal position and, Petition 870250070038, dated 06 / 08 / 2025, page 32 / 66 14 / 35 strictly speaking, is the power demanded by the driver, which is still different from the actual power demand required for normal vehicle operation. The current vehicle speed and the current vehicle gradient are important factors that determine the actual vehicle power demand. Simply put, when the vehicle is going faster, it needs to overcome greater air resistance and rolling resistance, and therefore requires higher power to maintain speed. When the vehicle is moving at an angle, the additional gravitational component reduces the vehicle speed. To overcome this force and maintain the vehicle speed, the vehicle requires higher power.Therefore, a more precise target power threshold is determined by combining the current vehicle speed and the current vehicle gradient, so that the determination of whether the combustion engine needs to be activated can be more rigorous, thus improving the accuracy of the determination and avoiding the case of the vehicle in EV mode switching to HEV mode when the battery has discharge capacity, resulting in low vehicle energy utilization.

[042] Step S103. When it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, switch an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and control a combustion engine in the hybrid electric vehicle to activate.

[043] Specifically, EV mode relies primarily on electric power. However, when the vehicle accelerates at high speed, the driver demands higher power for propulsion, among other cases, the traction battery in a low charge state may only provide low power, and the power demanded by the driver may exceed the power the battery can supply. If the motor is not activated in time for the Petition 870250070038, dated 06 / 08 / 2025, page 33 / 66 With 15 / 35 power assistance, the driver will inevitably notice insufficient power, or even sustained high-power discharge from the battery will trigger battery protection to limit discharge power, leading to power interruption.

[044] Therefore, when it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, this indicates that the battery discharge capacity is not sufficient to maintain normal vehicle operation at the current vehicle speed and gradient, nor sufficient to supply the power demanded by the driver. In this case, the vehicle's operating mode needs to be switched to Hybrid Electric Vehicle mode, i.e., HEV mode, and the combustion engine is activated. Meanwhile, the HEV mode is fed back to an infotainment system and an instrument panel for display. After the combustion engine is activated, a corresponding rotational speed and torque are allocated according to the HEV mode to provide drive force to the vehicle.

[045] Specifically, when it is detected that the power demand 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 electric vehicle is switched to Electric Vehicle mode. In this way, when the battery discharge capacity is sufficient, the operating mode of the hybrid electric vehicle is switched to Electric Vehicle mode, thus improving power utilization.

[046] In the control method for operating modes of a hybrid electric vehicle provided in this modality, when the hybrid electric vehicle is in Electric Vehicle mode, the power demanded by the hybrid electric vehicle, the discharge power of a traction battery and the Petition 870250070038, dated 06 / 08 / 2025, page 34 / 66 16 / 35 current vehicle speed and current gradient of the hybrid electric vehicle to learn a driver's power demand and battery discharge capacity. When it is detected that the power demand is greater than the predefined power threshold, the target power threshold is determined based on the current vehicle speed, current gradient, and the relative magnitude between the power demand and the discharge power, to determine if the combustion engine needs to be activated to provide power assistance at the current vehicle speed and current gradient.When it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, the hybrid electric vehicle's operating mode is switched to Hybrid Electric Vehicle mode, and the combustion engine in the hybrid electric vehicle is controlled to activate, to maintain normal vehicle operation, thus preventing the user from perceiving insufficient power because the traction battery's discharge capacity is insufficient in the vehicle's Electric Vehicle mode but the combustion engine fails to activate in time. When the battery's discharge capacity is recovered and the driver's demand is low, the hybrid electric vehicle's operating mode is switched to Electric Vehicle mode, thus improving energy utilization.

[047] A control method for operating modes of a hybrid electric vehicle is provided in this embodiment and is applicable to hybrid electric vehicles with operating mode switching. FIG. 2 is a flowchart of a control method for operating modes of a hybrid electric vehicle according to an embodiment of the present application. As shown in FIG. 2, the method includes the following steps.

[048] Step S201. When it is detected that a hybrid electric vehicle enters Electric Vehicle mode, acquire a power demand from the vehicle. Petition 870250070038, dated 06 / 08 / 2025, page 35 / 66 17 / 35 electric hybrid, a discharge power of a traction battery and a current vehicle speed and current gradient of the electric hybrid vehicle. For details, reference is made to step S101 in the embodiment shown in FIG. 1. The details are not described again in the present invention.

[049] Step S202. When it is detected that the power demand is greater than a predefined power threshold, determine a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the power demand and the discharge power.

[050] Specifically, the previous S202 step includes the following steps.

[051] Stage S2021. Calculate a first power threshold based on current vehicle speed and current gradient.

[052] Specifically, the first power threshold can be calculated through a mapping relationship between the current vehicle speed, the current gradient, and a power threshold. For example, when the power demanded by the driver is not greater than the discharge power, i.e., when the battery discharge capacity can meet the power demanded by the driver, the mapping relationship between the current vehicle speed, the current gradient, and the power threshold is shown in Table 1 below. Table 1 Current vehicle speed (kph) Current gradient magnitude 10 30 50 70 90 110 130 150 170 0 5 15 20 25 30 35 40 45 50 0.1 5 15 20 25 30 35 40 45 50 0.2 5 15 20 25 30 35 40 45 50 0.3 5 15 20 25 30 35 40 45 50 0.4 5 15 20 25 30 35 40 45 50 0.5 5 15 20 25 30 35 40 45 50 0.6 5 15 20 25 30 35 40 45 50 Petition 870250070038, dated 06 / 08 / 2025, page 36 / 66 18 / 35 Current vehicle speed (kph) Current gradient magnitude 10 30 50 70 90 110 130 150 170 0.7 5 15 20 25 30 35 40 45 50 0.8 5 15 20 25 30 35 40 45 50 0.9 5 15 20 25 30 35 40 45 50

[053] Step S2022. When it is detected that the power demand is greater than the discharge power and the power demand is greater than the first power threshold, adjust the first power threshold as a target power threshold.

[054] Specifically, when the driver's power demand is no greater than the discharge power, this indicates that the battery's discharge capacity can meet the driver's power demand. However, the power demand and discharge power still need to be compared to the target power threshold to determine if the battery's discharge capacity and the driver's power demand can meet normal vehicle operation at the current vehicle speed and current gradient. It is important to note that when the driver's power demand is greater than the discharge power and the power demand is greater than the first power threshold, the first power threshold determined in step S2021 is set as the target power threshold.

[055] Step S2023. When it is detected that the power demand is greater than the discharge power and the power demand and discharge power are both less than the first power threshold, calculate a second power threshold based on the current vehicle speed and current gradient, and adjust the second power threshold as the target power threshold.

[056] Specifically, in another case, the power demanded from the driver and the discharge power of the traction battery are both less than Petition 870250070038, dated 06 / 08 / 2025, page 37 / 66 19 / 35 the first power threshold, meaning that neither the power demanded by the driver nor the discharge power of the traction battery can meet the normal operation of the vehicle at the current vehicle speed and gradient, but the power demanded by the driver is greater than the discharge power of the battery. In this case, if the combustion engine is not activated in time, the driver will still perceive insufficient power, which will compromise the user experience.

[057] Therefore, the target power threshold for comparison needs to be adjusted. In this way, when the power demanded by the driver is greater than the battery discharge power, the combustion engine can be activated in time, thus providing the driver with a better driving experience.

[058] For example, when the power demand is greater than the discharge power and both the power demand and the discharge power are less than the first power threshold, the mapping relationship between the current vehicle speed, the current gradient, and the power threshold is shown in Table 2 below: Table 2 Current vehicle speed (kph) Current gradient magnitude 10 30 50 70 90 110 130 150 170 0 5 5 10 15 20 25 30 35 40 0.1 5 5 10 15 20 25 30 35 40 0.2 5 5 10 15 20 25 30 35 40 0.3 5 5 10 15 20 25 30 35 40 0.4 5 5 10 15 20 25 30 35 40 0.5 5 5 10 15 20 25 30 35 40 0.6 5 5 10 15 20 25 30 35 40 0.7 5 5 10 15 20 25 30 35 40 0.8 5 5 10 15 20 25 30 35 40 0.9 5 5 10 15 20 25 30 35 40 Petition 870250070038, dated 06 / 08 / 2025, page 38 / 66 20 / 35

[059] In this way, the corresponding target power threshold is calculated based on the current vehicle speed and current gradient in combination with the relative magnitude between the power demand and the discharge power, thus facilitating the determination of whether the battery discharge capacity and the driver's power demand can meet the normal operation of the vehicle at the current vehicle speed and current gradient and activate the combustion engine in time.

[060] Step S203. When it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, switch an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and control a combustion engine in the hybrid electric vehicle to activate. For details, reference is made to step S103 in the embodiment shown in FIG. 1. The details are not described again in the present invention.

[061] Specifically, after the operating mode of the hybrid electric vehicle is switched to Hybrid Electric Vehicle mode and the combustion engine in the hybrid electric vehicle is activated, step S204 and subsequent steps can continue to be performed.

[062] Step S204. Calculate a discharge power threshold based on the current vehicle speed.

[063] In some optional modes, the discharge power threshold is calculated through the mapping relationship between the current vehicle speed and the discharge power. For example, the mapping relationship between the current vehicle speed and the discharge power is shown in Table 3 below. Table 3 Vehicle speed (kph) 0 20 40 60 80 100 120 140 Petition 870250070038, dated 06 / 08 / 2025, page 39 / 66 21 / 35 I Power (kW) | 25 | 25 | 25 | 30 | 35 | 40 | 45 | 50 |

[064] Step S205. Calculate a demand power threshold based on the current vehicle speed.

[065] In some optional modes, the demanded power threshold is calculated through the mapping relationship between the current vehicle speed and the demanded power. For example, the mapping relationship between the current vehicle speed and the demanded power is shown in Table 4 below. Table 4 Vehicle speed (kph) 0 20 40 60 80 100 120 140 Power (kW) 15 15 15 20 25 30 35 40

[066] Step S206. When it is detected that the discharge power is greater than the discharge power threshold and the power demand is less than the power demand threshold, switch the operating mode of the hybrid electric vehicle from Hybrid Electric Vehicle mode to Electric Vehicle mode and turn off the combustion engine in the hybrid electric vehicle.

[067] Specifically, after the vehicle is switched from Electric Vehicle mode to Hybrid Electric Vehicle mode, i.e., it is switched from EV mode to HEV mode, the discharge power of the traction battery is gradually recovered. In this case, the vehicle can switch back to EV mode to improve energy utilization, thus achieving superior fuel economy. In this way, when it is detected that the discharge power is greater than the discharge power threshold and the power demand is less than the power demand threshold, the operating mode of the hybrid electric vehicle can be switched from HEV mode to EV mode, with the combustion engine being switched off in the hybrid electric vehicle, thus improving energy utilization and achieving superior fuel economy.

[068] Specifically, when it is detected that the discharge power Petition 870250070038, dated 06 / 08 / 2025, page 40 / 66 If 22 / 35 is not greater than the discharge power threshold or the power demand is not less than the power demand threshold, the hybrid electric vehicle operating mode remains in Hybrid Electric Vehicle mode. This way, when the traction battery discharge power is not recovered, the Hybrid Electric Vehicle mode is maintained to ensure normal vehicle operation.

[069] In the control method for operating modes of a hybrid electric vehicle provided in this embodiment, when the hybrid electric vehicle is in Electric Vehicle mode, the power demand of the hybrid electric vehicle, the discharge power of a traction battery, and the current vehicle speed and current gradient of the hybrid electric vehicle are acquired to learn a driver's power demand and the battery's discharge capacity. When it is detected that the power demand is greater than the predefined power threshold, the corresponding target power threshold is calculated based on the current vehicle speed and current gradient in combination with the relative magnitude between the power demand and the discharge power, thus facilitating the determination of whether the battery's discharge capacity and the driver's power demand can meet the normal operation of the vehicle at the current vehicle speed and current gradient.When it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, the operating mode of the hybrid electric vehicle is switched to Hybrid Electric Vehicle mode, and the combustion engine in the hybrid electric vehicle is controlled to activate, to maintain normal vehicle operation, thus preventing the user from perceiving insufficient power because the traction battery discharge capacity is insufficient in the vehicle's Electric Vehicle mode but the combustion engine fails to activate in time. When the battery discharge capacity is recovered and the driver's demand is low, the operating mode... Petition 870250070038, dated 06 / 08 / 2025, page 41 / 66 23 / 35 of the hybrid electric vehicle is switched to Electric Vehicle mode, thus improving energy utilization.

[070] A control method for operating modes of a hybrid electric vehicle is provided in this embodiment and is applicable to hybrid electric vehicles with operating mode switching. FIG. 3 is a flowchart of a control method for operating modes of a hybrid electric vehicle according to an embodiment of the present application. As shown in FIG. 3, the method includes the following steps.

[071] Step S31. When it is detected that a remaining state of charge of a traction battery in a hybrid electric vehicle reaches a first predefined state of charge threshold, receive a driver selection input for the hybrid electric vehicle operating mode.

[072] Specifically, when it is detected that the remaining state of charge of the traction battery in the hybrid electric vehicle reaches the first predefined state of charge threshold, the driver can select EV mode or HEV mode via the infotainment system.

[073] In some optional modes, when it is detected that the remaining state of charge is greater than a second predefined state of charge threshold, the operating mode of the hybrid electric vehicle is switched to Electric Vehicle mode. In this case, the vehicle is controlled to automatically enter EV mode, and the mode is fed back to the infotainment system and instrument panel for display. When it is detected that the remaining state of charge is less than a third predefined state of charge threshold, the operating mode of the hybrid electric vehicle is switched to Hybrid Electric Vehicle mode. In this case, the vehicle automatically exits EV mode, and HEV mode is fed back to the infotainment system and instrument panel for display. Petition 870250070038, dated 06 / 08 / 2025, page 42 / 66 24 / 35

[074] It is important to note that the first preset state of charge threshold is higher than the third preset state of charge threshold and lower than the second preset state of charge threshold. The first preset state of charge threshold, the second preset state of charge threshold, and the third preset state of charge threshold can be adjusted based on factors such as ambient temperature, traction battery temperature, altitude, and gradient magnitude.

[075] In this way, the operating mode of the hybrid electric vehicle is switched automatically based on the remaining charge state of the traction battery, thus ensuring smooth vehicle operation.

[076] Step S32. Switch the operating mode of the hybrid electric vehicle to Electric Vehicle mode or Hybrid Electric Vehicle mode based on the selection result.

[077] In this way, when the remaining state of charge of the traction battery reaches the first predefined state of charge threshold, the driver is allowed to select the vehicle's operating mode to meet the various user requirements, thereby improving the user experience.

[078] Step S301. When it is detected that the hybrid electric vehicle enters Electric Vehicle mode, acquire a demanded power from the hybrid electric vehicle, a discharge power from the traction battery, and a current vehicle speed and current gradient of the hybrid electric vehicle. For details, reference is made to step S201 in the embodiment shown in FIG. 2. The details are not described again in the present invention.

[079] Step S302. When it is detected that the power demand is greater than a predefined power threshold, determine a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the power demand and the discharge power. For Petition 870250070038, dated 06 / 08 / 2025, page 43 / 66 25 / 35 details, reference is made to step S202 in the embodiment shown in FIG. 2. The details are not described again in the present invention.

[080] Step S303. When it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, switch an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and control a combustion engine in the hybrid electric vehicle to activate. For details, reference is made to step S203 in the embodiment shown in FIG. 2. The details are not described again in the present invention.

[081] In the control method for operating modes of a hybrid electric vehicle provided in this embodiment, when the hybrid electric vehicle is in Electric Vehicle mode, the power demand of the hybrid electric vehicle, the discharge power of a traction battery, and the current vehicle speed and current gradient of the hybrid electric vehicle are acquired to learn a driver's power demand and the battery discharge capacity. When it is detected that the power demand is greater than the predefined power threshold, the target power threshold is determined based on the current vehicle speed, the current gradient, and the relative magnitude between the power demand and the discharge power, to determine whether the combustion engine needs to be activated to provide power assistance at the current vehicle speed and current gradient.When it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, the operating mode of the hybrid electric vehicle is switched to Hybrid Electric Vehicle mode, and the combustion engine in the hybrid electric vehicle is controlled to activate, to maintain normal vehicle operation, thus preventing a user from perceiving insufficient power because the traction battery's discharge capacity is insufficient. Petition 870250070038, dated 06 / 08 / 2025, page 44 / 66 26 / 35 in the vehicle's Electric Vehicle mode, but the combustion engine fails to activate in time. When the battery discharge capacity is recovered and the driver's demand is low, the hybrid electric vehicle's operating mode is switched to Electric Vehicle mode, thus improving energy utilization.

[082] In addition, the operating mode of the hybrid electric vehicle is switched automatically based on the remaining charge state of the traction battery, thus ensuring smooth vehicle operation and, when the remaining charge state of the traction battery reaches the first predefined charge state threshold, the driver can select the vehicle's operating mode to meet the various user requirements.

[083] The control method for operating modes of a hybrid electric vehicle in the embodiments of the present application is further described below in combination with a specific application example. As shown in FIG. 4, the specific application example includes the following steps.

[084] Step 1. When the SOC (remaining state of charge) of the traction battery is greater than a second preset state of charge threshold to automatically enter EV mode, automatically enter EV mode and feed that mode back to the infotainment system and instrument panel for display.

[085] Step 2. When the traction battery SOC reaches the first preset state-of-charge threshold to allow the user to select the vehicle's operating mode, the driver can select EV mode or HEV mode via the infotainment system.

[086] Step 3. After the driver selects EV mode, acquire the accelerator pedal position and current vehicle speed from the vehicle via the hybrid PCU power control unit in the vehicle and then convert to Petition 870250070038, dated 06 / 08 / 2025, pages 45 / 66 27 / 35 accelerator pedal position according to the pre-established mapping relationship between accelerator pedal position and power demand to determine the power demanded by the driver and acquire the discharge power of the traction battery. The following two cases are included.

[087] Case 1. When the driver's power demand is high, i.e., greater than the predefined power threshold, the first power threshold is calculated based on the current vehicle speed, the current gradient and the mapping ratio in Table 1 above, and when the power demand is higher and the discharge power is less than the first power threshold, the vehicle is switched to HEV mode, the combustion engine is activated and the HEV mode is returned to the infotainment system and instrument panel for display.

[088] Case 2. When the driver's power demand and the traction battery discharge power are both less than the first power threshold, but the driver's power demand is greater than the battery discharge power, in this case, if the engine is not started in time, the driver perceives insufficient power. Therefore, the second power threshold is calculated based on the current vehicle speed, the current gradient, and the mapping ratio in Table 2 above. When the power demand and the discharge power are less than the second power threshold, the mode is switched to HEV mode, the combustion engine is activated, and the HEV mode is fed back to the infotainment system and instrument panel for display. After the combustion engine is activated, the allocated rotational speed and torque are selected according to the HEV mode to provide a driving force to the vehicle.

[089] Step 4. When the battery discharge power is recovered to the discharge power threshold and the power demanded from the driver is Petition 870250070038, dated 06 / 08 / 2025, pages 46 / 66 If the 28 / 35 is less than the required power threshold and the duration is greater than a set value, switch the vehicle's operating mode from HEV mode to EV mode, turn off the combustion engine, and feed back into EV mode for the infotainment system and instrument panel display.

[090] Step 5. When the traction battery SOC is less than a third preset state of charge threshold to automatically exit EV mode, automatically exit EV mode, switch to HEV mode and feed that mode back to the infotainment system and instrument panel for display.

[091] For the control method for operating modes of a hybrid electric vehicle provided in this application, when the driver selects EV mode, it is possible to achieve intelligent switching between EV mode and HEV mode. In EV mode, when the battery discharge power is insufficient and the motor needs to be activated, the mode is switched to HEV mode. In HEV mode, after the traction battery discharge power is recovered, the vehicle is intelligently switched from HEV mode to EV mode. This application introduces the determination based on battery discharge power and driver power demand to switch between EV mode and HEV mode, thus determining the ideal power and driving performance and fuel economy.

[092] This embodiment further provides a control device for operating modes of a hybrid electric vehicle. The device is configured to implement the previous embodiments and optional embodiments, and the content described is not repeated. As used in the present invention, the term module refers to a combination of software and / or hardware configured to implement a predetermined function. Although the device described in the following embodiments is Petition 870250070038, dated 06 / 08 / 2025, page 47 / 66 29 / 35 preferably implemented in software, implementation via hardware or a combination of software and hardware is also possible and contemplated.

[093] This embodiment provides a control device for operating modes of a hybrid electric vehicle, and as shown in FIG. 5, includes: A first processing module 501, configured to: when it is detected that a hybrid electric vehicle enters Electric Vehicle mode, acquire a power demand from the hybrid electric vehicle, a discharge power from a traction battery, and a current vehicle speed and current gradient of the hybrid electric vehicle; A first 502 processing module, configured to: when it is detected that the power demand is greater than a predefined power threshold, determine a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the power demand and the discharge power; and a third 503 processing module, configured to: when it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, switch an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and control a combustion engine in the hybrid electric vehicle to activate.

[094] In an optional configuration, the second processing module includes: a first processing unit, configured to calculate an initial power threshold based on the current vehicle speed and current gradient; a second processing unit, configured to: when it is detected that the power demand is greater than the discharge power and the Petition 870250070038, dated 06 / 08 / 2025, pages 48 / 66 30 / 35 demanded power is greater than the first power threshold, adjust the first power threshold as the target power threshold; and a third processing unit, configured to: when it is detected that the demanded power is greater than the discharge power and the demanded power and the discharge power are both less than the first power threshold, calculate a second power threshold based on the current vehicle speed and current gradient, and adjust the second power threshold as the target power threshold.

[095] In an optional configuration, the device additionally includes: 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 demand power threshold based on the current vehicle speed; and a sixth processing module, configured to: when it is detected that the discharge power is greater than the discharge power threshold and the demand power is less than the demand power threshold, switch the operating mode of the hybrid electric vehicle from Hybrid Electric Vehicle mode to Electric Vehicle mode and turn off the combustion engine in the hybrid electric vehicle.

[096] In an optional configuration, the device additionally includes: A seventh processing module, configured to: when it is detected that the discharge power is not greater than the discharge power threshold or the power demand is not less than the power demand threshold, maintain the hybrid electric vehicle's operating mode in Hybrid Electric Vehicle mode.

[097] In an optional configuration, the device additionally includes: an eighth processing module, configured for: when it is Petition 870250070038, dated 06 / 08 / 2025, p. 49 / 66 31 / 35 detected that the power demand is not greater than the target power threshold and the discharge power is not less than the target power threshold, switch the hybrid electric vehicle operating mode to Electric Vehicle mode.

[098] In an optional configuration, the device additionally includes: A ninth processing module, configured to: when it is detected that a remaining state of charge of the traction battery in the hybrid electric vehicle reaches a first predefined state of charge threshold, receive a selection input from the driver for the hybrid electric vehicle's operating mode; and a tenth processing module, configured to switch the hybrid electric vehicle's operating mode to Electric Vehicle mode or Hybrid Electric Vehicle mode based on the selection result.

[099] In an optional configuration, the device additionally includes: An eleventh processing module, configured to: when it is detected that the remaining state of charge is greater than a second predefined state of charge threshold, switch the operating mode of the hybrid electric vehicle to Electric Vehicle mode; and a twelfth processing module, configured to: when it is detected that the remaining state of charge is less than a third predefined state of charge threshold, switch the operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode, in which the first predefined state of charge threshold is greater than the third predefined state of charge threshold and is less than the second predefined state of charge threshold.

[100] Additional functional descriptions of each of the above modules and units are identical to the corresponding embodiments described above, and the details will not be described in the present invention. Petition 870250070038, dated 06 / 08 / 2025, pages 50 / 66 32 / 35

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

[102] The embodiments of the present application additionally provide a hybrid electric vehicle, including the previous control apparatus for operating modes of a hybrid electric vehicle shown in FIG. 5.

[103] With reference to FIG. 6. FIG. 6 is a schematic structural diagram of a hybrid electric vehicle according to an embodiment of the present application. As shown in FIG. 6, the hybrid electric vehicle includes one or more processors 10, a memory 20, and interfaces for connecting components, including high- and low-speed interfaces. The components are communicatively connected to each other by different buses and can be installed on a common motherboard or installed in other configurations as needed. The processor executes instructions within the hybrid electric vehicle, including instructions stored in memory to display graphical information to a GUI on an external input / output device (e.g., a display device coupled to the interfaces). In some optional embodiments, multiple processors and / or multiple buses can be employed with multiple memories when necessary.Similarly, multiple devices can be connected, each providing part of the necessary operations (for example, as a server array, a group of blade servers, or a multiprocessor system). A processor 10 is used as an example in FIG. 6.

[104] Processor 10 can be a central processing unit, Petition 870250070038, dated 06 / 08 / 2025, pp. 51 / 66 33 / 35 a network processor or a combination thereof. The processor 10 may include a hardware chip. The aforementioned hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field-programmable gate array, a generic array logic, or any combination thereof.

[105] Memory 20 stores executable instructions by at least one processor 10, enabling at least one processor 10 to perform the methods shown in the modes mentioned above.

[106] Memory 20 may include a program storage area and a data storage area. The program storage area may store an operating system and an application required for at least one function. The data storage area may store data created in accordance with the use of a hybrid electric vehicle and the like. In addition, memory 20 may include high-speed random access memory (RAM) and may additionally include non-transient memory, for example, at least one magnetic disk storage device, flash storage device, or other non-transient solid-state storage device. In some optional embodiments, memory 20 optionally includes memories located remotely relative to the processor 10. These remote memories may be connected to the hybrid electric vehicle via a network.An example of the above network includes, but is not limited to, the internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[107] Memory 20 may include volatile memory, for example, random access memory; memory may additionally include a Petition 870250070038, dated 06 / 08 / 2025, pp. 52 / 66 34 / 35 non-volatile memory, for example, flash memory, a hard disk drive or a solid-state drive; and memory 20 may additionally include a combination of the memory types mentioned above.

[108] The hybrid electric vehicle additionally includes a communication interface 30, configured to enable communication between the hybrid electric vehicle and another communication device or network.

[109] Embodiments of the present application further provide a computer storage medium. The methods according to the embodiments of the present application may be implemented in hardware or firmware, or may be implemented as computer code recorded on a storage medium, or implemented as computer code that can be downloaded via a network, originally stored on a remote storage medium or machine-readable non-transient storage medium and subsequently stored on a local storage medium. Thus, the methods described in the present invention may be processed by such software stored on a storage medium using general-purpose computers, dedicated processors, or programmable / dedicated hardware.The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk drive, or a solid-state drive; optionally, the storage medium may additionally include combinations of the aforementioned memory types. It should be understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code. When accessed and executed by computers, processors, or hardware, the software or computer code implements the methods. Petition 870250070038, dated 06 / 08 / 2025, pages 53 / 66 35 / 35 illustrated in the modalities above.

[110] Although the embodiments of the present application are described together with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and variations fall within the scope defined by the accompanying claims. Petition 870250070038, dated 06 / 08 / 2025, pp. 54 / 66

Claims

1 / 7 CLAIMS 1.A control method for operating modes of a hybrid electric vehicle, characterized in that the method comprises: when it is detected that a hybrid electric vehicle enters Electric Vehicle mode, acquiring a demand power from the hybrid electric vehicle, a discharge power from a traction battery, and a current vehicle speed and current gradient of the hybrid electric vehicle; when it is detected that the demand power is greater than a predefined power threshold, determining a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the demand power and the discharge power; and when it is detected that the demand power is greater than the target power threshold and the discharge power is less than the target power threshold, switching an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and controlling a combustion engine in the hybrid electric vehicle to activate.

2. Method, according to claim 1, characterized in that the step of determining a target power threshold based on the current vehicle speed, the current gradient, and a relative magnitude between the demanded power and the discharge power comprises: calculating a first power threshold based on the current vehicle speed and the current gradient; when it is detected that the demanded power is greater than the discharge power and the demanded power is greater than the first power threshold, adjusting the first power threshold as the target power threshold; and when it is detected that the demanded power is greater than the discharge power and the demanded power and the discharge power are both Petition 870250070038, dated 06 / 08 / 2025, p.60 / 66 2 / 7 less than the first power threshold, calculate a second power threshold based on the current vehicle speed and current gradient, and adjust the second power threshold as the target power threshold.

3. A method according to claim 2, characterized in that, after the step of switching an operating mode of the hybrid electric vehicle to the Hybrid Electric Vehicle mode and controlling a combustion engine in the hybrid electric vehicle to activate, the method further comprises: calculating a discharge power threshold based on the current vehicle speed; calculating a demand power threshold based on the current vehicle speed; and when it is detected that the discharge power is greater than the discharge power threshold and the demand power is less than the demand power threshold, switching the operating mode of the hybrid electric vehicle from the Hybrid Electric Vehicle mode to the Electric Vehicle mode and switching off the combustion engine in the hybrid electric vehicle.

4. 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 power demand is not less than the power demand threshold, maintaining the operating mode of the hybrid electric vehicle in Hybrid Electric Vehicle mode.

5. Method, according to claim 1, characterized in that the method further comprises: when it is detected that the power demand is not greater than the target power threshold and the discharge power is not less than the target power threshold, switching the operating mode of the hybrid electric vehicle to Electric Vehicle mode.

6. A method, according to any one of claims 1 to 5, characterized in that the method further comprises: when it is detected that a remaining state of charge of the traction battery in the hybrid electric vehicle reaches a first predefined state of charge threshold, receiving a selection input from the driver for the operating mode of the hybrid electric vehicle; and switching the operating mode of the hybrid electric vehicle to Electric Vehicle mode or Hybrid Electric Vehicle mode based on the selection result.

7. A method according to claim 6, characterized in that the method further comprises: when it is detected that the remaining state of charge is greater than a second predefined state of charge threshold, switching the operating mode of the hybrid electric vehicle to Electric Vehicle mode; and when it is detected that the remaining state of charge is less than a third predefined state of charge threshold, switching the operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode, wherein the first predefined state of charge threshold is greater than the third predefined state of charge threshold and is less than the second predefined state of charge threshold.

8. Control device for operating modes of a hybrid electric vehicle characterized in that the device comprises: a first processing module, configured to: when it is detected that a hybrid electric vehicle enters Electric Vehicle mode, acquire a power demand from the hybrid electric vehicle, a power of Petition 870250070038, dated 06 / 08 / 2025, page.62 / 66 4 / 7 discharge of a traction battery and a current vehicle speed and current gradient of the hybrid electric vehicle; a second processing module, configured to: when it is detected that the power demand is greater than a predefined power threshold, determine a target power threshold based on the current vehicle speed, the current gradient and a relative magnitude between the power demand and the discharge power; and a third processing module, configured to: when it is detected that the power demand is greater than the target power threshold and the discharge power is less than the target power threshold, switch an operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode and control a combustion engine in the hybrid electric vehicle to activate.

9. Apparatus, according to claim 8, characterized in that the second processing module comprises: a first processing unit, configured to calculate a first power threshold based on the current vehicle speed and current gradient; a second processing unit, configured to: when it is detected that the power demand is greater than the discharge power and the power demand is greater than the first power threshold, adjust the first power threshold as the target power threshold; and a third processing unit, configured to: when it is detected that the power demand is greater than the discharge power and the power demand and the discharge power are both less than the first power threshold, calculate a second power threshold based on the current vehicle speed and current gradient, and adjust the second power threshold as the target power threshold.Petition 870250070038, dated 06 / 08 / 2025, pages 63 / 66 5 / 7.

10. Apparatus, according to claim 9, characterized in that the apparatus 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 demand power threshold based on the current vehicle speed; and a sixth processing module, configured to: when it is detected that the discharge power is greater than the discharge power threshold and the demand power is less than the demand power threshold, switch the operating mode of the hybrid electric vehicle from Hybrid Electric Vehicle mode to Electric Vehicle mode and turn off the combustion engine in the hybrid electric vehicle.

11. Device according to claim 10, characterized in that the device further comprises: a seventh processing module, configured to: when it is detected that the discharge power is not greater than the discharge power threshold or the power demand is not less than the power demand threshold, maintain the operating mode of the hybrid electric vehicle in Hybrid Electric Vehicle mode.

12. Device according to claim 8, characterized in that the device further comprises: an eighth processing module, configured to: when it is detected that the power demand is not greater than the target power threshold and the discharge power is not less than the target power threshold, switch the operating mode of the hybrid electric vehicle to Electric Vehicle mode.

13. Apparatus, according to any one of claims 8 to 12, characterized in that the apparatus further comprises: Petition 870250070038, dated 06 / 08 / 2025, pp. 64 / 66 6 / 7 a ninth processing module, configured to: when it is detected that a remaining state of charge of the traction battery in the hybrid electric vehicle reaches a first predefined state of charge threshold, receive a selection input from the driver for the operating mode of the hybrid electric vehicle; and a tenth processing module, configured to switch the operating mode of the hybrid electric vehicle to Electric Vehicle mode or Hybrid Electric Vehicle mode based on the selection result.

14. Apparatus, according to claim 13, characterized in that the apparatus further comprises: an eleventh processing module, configured to: when it is detected that the remaining state of charge is greater than a second predefined state of charge threshold, switch the operating mode of the hybrid electric vehicle to Electric Vehicle mode; and a twelfth processing module, configured to: when it is detected that the remaining state of charge is less than a third predefined state of charge threshold, switch the operating mode of the hybrid electric vehicle to Hybrid Electric Vehicle mode, in which the first predefined state of charge threshold is greater than the third predefined state of charge threshold and is less than the second predefined state of charge threshold.

15. Hybrid electric vehicle characterized in that it comprises: 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 performs, in executing the computer instructions, the control method for operating modes of a hybrid electric vehicle defined in any one of claims 1 to 7. Petition 870250070038, dated 06 / 08 / 2025, pp. 65 / 66 7 / 7 16. Computer-readable storage medium characterized in that the computer-readable storage medium has computer instructions stored thereon, and the computer instructions are configured to enable a computer to perform the control method for operating modes of a hybrid electric vehicle defined in any one of claims 1 to 7. Petition 870250070038, dated 06 / 08 / 2025, pp. 66 / 66

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