Range extender power control method and device and storage medium thereof

Abstract

The application discloses a range extender power control method and device and a storage medium thereof, and belongs to the technical field of range extender electric vehicles. The range extender power control method comprises the following steps: in a driving state of a vehicle, a first working condition parameter of the vehicle is dynamically acquired; the first working condition parameter comprises one or more of a first accelerator operating parameter, a first vehicle-mounted electrical appliance operating power, a first vehicle speed parameter, a first battery power parameter and a first driving motor power; whether a preset vehicle speed power limiting mode is triggered is judged according to the first working condition parameter; and if the vehicle speed power limiting mode is triggered, the maximum power of a range extender of the vehicle is limited according to a mode type of the vehicle speed power limiting mode. The application solves the technical problem of poor NVH performance in the working process of a conventional range extender.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range extended electric vehicles, and particularly relates to a range extender power control method, device and storage medium thereof. BACKGROUND

[0002] Pure electric vehicles have the advantages of energy saving and environmental protection, but the limited driving range, insufficient charging facilities and slow charging speed are still not accepted by many consumers. In order to solve the range anxiety of consumers and not rely on charging facilities, range extended electric vehicles have been rapidly developed in recent years, and have been recognized by more and more people in terms of technology and market.

[0003] In the use process of the range extended electric vehicle, the range extender power is decoupled from the vehicle speed to realize that the range extender runs in the high efficiency area in most driving conditions. Therefore, under the condition of medium and low vehicle speed, the range extender will frequently work at high power or even rated power due to the need to respond to the bus torque request. However, under the condition of medium and low vehicle speed, the range extender working at high power will produce a large noise, so that the NVH (Noise Vibration Harshness) performance of the vehicle is poor, which affects the comfort of driving.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0005] The main purpose of the present application is to provide a range extender power control method, device and storage medium, which aims to solve the technical problem of poor NVH performance in the working process of the conventional range extender.

[0006] In order to achieve the above purpose, the present application provides a range extender power control method, device and storage medium, wherein the range extender power control method comprises:

[0007] In the driving state of the vehicle, the first working condition parameter of the vehicle is dynamically acquired; the first working condition parameter comprises one or more of the first throttle operating parameter, the first vehicle-mounted electrical appliance operating power, the first vehicle speed parameter, the first battery power parameter and the first driving motor power;

[0008] According to the first working condition parameter, it is judged whether the preset vehicle speed power limiting mode is triggered;

[0009] If the vehicle speed power limiting mode is triggered, the maximum power of the range extender of the vehicle is limited according to the mode type of the vehicle speed power limiting mode.

[0010] Optionally, the step of limiting the maximum power of the range extender of the vehicle according to the mode type of the vehicle speed power limiting mode comprises:

[0011] in response to the mode type of the vehicle speed power limiting mode being a low speed power limiting mode, limiting the range extender maximum power of the vehicle to a first proportion of the rated maximum power;

[0012] in response to the mode type of the vehicle speed power limiting mode being a medium speed power limiting mode, limiting the range extender maximum power of the vehicle to a second proportion of the rated maximum power; the second proportion being greater than the first proportion.

[0013] Optionally, the mode type of the vehicle speed power limiting mode includes a low speed power limiting mode, and the step of determining whether to trigger the preset vehicle speed power limiting mode according to the first working condition parameter includes:

[0014] determining whether the first working condition parameter meets a mode triggering criterion of the low speed power limiting mode, wherein the mode triggering criterion of the low speed power limiting mode includes that the first accelerator operating parameter is less than or equal to a preset low speed triggering accelerator threshold for a time period, is greater than or equal to a preset low speed triggering accelerator time period threshold, and the first vehicle speed parameter is greater than or equal to a preset low speed triggering speed threshold for a time period, is greater than or equal to a preset low speed triggering speed time period threshold, and the first vehicle-mounted electrical appliance operating power is less than or equal to a preset low speed triggering electrical appliance demand power threshold;

[0015] if the first working condition parameter meets the mode triggering criterion of the low speed power limiting mode, determining to trigger the low speed power limiting mode;

[0016] if the first working condition parameter does not meet the mode triggering criterion of the low speed power limiting mode, determining not to trigger the low speed power limiting mode.

[0017] Optionally, the mode type of the vehicle speed power limiting mode includes a medium speed power limiting mode, and the step of determining whether to trigger the preset vehicle speed power limiting mode according to the first working condition parameter further includes:

[0018] determining whether the first working condition parameter meets a mode triggering criterion of the medium speed power limiting mode, wherein the mode triggering criterion of the low speed power limiting mode includes that the first accelerator operating parameter is less than or equal to a preset medium speed triggering accelerator threshold for a time period, is greater than or equal to a preset medium speed triggering accelerator time period threshold, and the first vehicle speed parameter is less than or equal to a preset medium speed triggering speed threshold for a time period, is greater than or equal to a preset medium speed triggering speed time period threshold, and the first vehicle-mounted electrical appliance operating power is less than or equal to a preset medium speed triggering electrical appliance demand power threshold, and the first battery power parameter is greater than or equal to a preset medium speed triggering power threshold, and the first driving motor power is less than or equal to a preset medium speed triggering motor power threshold for a time period, is greater than or equal to a preset medium speed triggering motor power time period threshold;

[0019] if the first operating condition parameter meets the mode triggering criterion of the medium-speed limited power mode, it is determined that the medium-speed limited power mode is triggered;

[0020] if the first operating condition parameter does not meet the mode triggering criterion of the medium-speed limited power mode, it is determined that the medium-speed limited power mode is not triggered;

[0021] wherein the preset medium-speed triggering throttle time threshold is greater than the preset low-speed triggering throttle time threshold, the preset medium-speed triggering speed threshold is greater than the preset low-speed triggering speed threshold, the preset medium-speed triggering speed time threshold is greater than the preset low-speed triggering speed time threshold, and the preset medium-speed triggering electrical appliance demand power threshold is greater than the preset low-speed triggering electrical appliance demand power threshold.

[0022] Optionally, after the step of limiting the maximum power of the range extender of the vehicle, the method further comprises:

[0023] dynamically obtaining a second operating condition parameter of the vehicle; the second operating condition parameter is an operating condition parameter after the vehicle triggers the vehicle speed limited power mode, and comprises one or more of a second throttle operating parameter, a second vehicle-mounted electrical appliance operating power, a second vehicle speed parameter, a second battery power parameter, and a second driving motor power;

[0024] determining whether to exit the vehicle speed limited power mode according to the second operating condition parameter;

[0025] if the vehicle speed limited power mode is exited, the limitation on the maximum power of the range extender of the vehicle is removed.

[0026] Optionally, the step of determining whether to exit the vehicle speed limited power mode according to the second operating condition parameter comprises:

[0027] if the mode type of the vehicle speed limited power mode is a low-speed limited power mode, it is determined whether the second operating condition parameter meets the mode exit criterion of the low-speed limited power mode, wherein the mode exit criterion of the low-speed limited power mode comprises that the second vehicle speed parameter is greater than or equal to a preset low-speed exit speed threshold for a time greater than a preset low-speed exit speed time threshold, or the second vehicle-mounted electrical appliance operating power is greater than a preset low-speed exit electrical appliance demand power threshold, or the second battery power parameter is less than a preset low-speed exit power threshold, and the second throttle operating parameter is greater than a preset low-speed exit throttle threshold for a time greater than a preset low-speed exit throttle time threshold;

[0028] if the second operating condition parameter meets the mode exit criterion of the low-speed limited power mode, it is determined that the low-speed limited power mode is exited;

[0029] if the second operating condition parameter does not meet the mode exit criterion of the low-speed limited power mode, it is determined that the low-speed limited power mode is maintained.

[0030] wherein the preset low-speed exit speed threshold is greater than the preset low-speed trigger speed threshold, the preset low-speed exit speed duration threshold is greater than the preset low-speed trigger speed duration threshold, the preset low-speed exit electric appliance demand power threshold is greater than the preset low-speed trigger demand power, and the preset low-speed trigger throttle threshold is less than the preset low-speed exit throttle threshold.

[0031] Optionally, the step of determining whether to exit the vehicle speed power limiting mode according to the second working condition parameter further comprises:

[0032] if the mode type of the vehicle speed power limiting mode is a medium-speed power limiting mode, determining whether the second working condition parameter meets the mode exit standard of the medium-speed power limiting mode, wherein the mode exit standard of the medium-speed power limiting mode comprises: the second throttle operating parameter being greater than or equal to a preset medium-speed exit throttle threshold for a duration greater than or equal to a preset medium-speed exit throttle duration threshold, or the second vehicle speed parameter being greater than or equal to a preset medium-speed exit speed threshold for a duration greater than or equal to a preset medium-speed exit speed duration threshold, or the second vehicle-mounted electric appliance operating power being greater than a preset medium-speed exit electric appliance demand power threshold, or the second battery power parameter being less than a preset medium-speed exit battery power threshold, or the second driving motor power being greater than or equal to a preset medium-speed exit motor power threshold for a duration greater than or equal to a preset medium-speed exit motor power duration threshold.

[0033] if the second working condition parameter meets the mode exit standard of the medium-speed power limiting mode, determining to exit the medium-speed power limiting mode.

[0034] if the second working condition parameter does not meet the mode exit standard of the medium-speed power limiting mode, determining to maintain the medium-speed power limiting mode.

[0035] wherein the preset medium-speed exit throttle threshold is greater than the preset medium-speed trigger throttle threshold, the preset medium-speed exit throttle duration threshold is less than the preset medium-speed trigger throttle duration threshold, the preset medium-speed exit speed threshold is greater than the preset medium-speed trigger speed threshold, the preset medium-speed exit speed duration threshold is greater than the preset medium-speed trigger speed duration threshold, the preset medium-speed exit electric appliance demand power threshold is greater than the preset medium-speed trigger electric appliance demand power threshold, the preset medium-speed exit battery power threshold is less than the preset low-speed exit battery power threshold, the preset medium-speed exit motor power threshold is greater than the preset medium-speed trigger motor power threshold, and the preset medium-speed exit motor power duration threshold is greater than the preset medium-speed trigger motor power duration threshold.

[0036] Optionally, after the step of determining whether to trigger the preset vehicle speed power limiting mode according to the first working condition parameter, the method further comprises:

[0037] If the vehicle speed limit power mode is not triggered, the vehicle's range extender maximum power is kept as the rated maximum power.

[0038] The application also provides a range extender power control device, comprising a memory, a processor, and a range extender power control program stored in the memory and executable on the processor, the range extender power control program being configured to implement the steps of the range extender power control method.

[0039] The application also provides a storage medium, which is a computer readable storage medium, and the range extender power control program is stored on the computer readable storage medium and executed by a processor to implement the steps of the range extender power control method.

[0040] The application discloses a range extender power control method, device and storage medium. In the embodiment, when the vehicle is in a driving state, a first working condition parameter of the vehicle is dynamically obtained, wherein the first working condition parameter comprises one or more of a first accelerator operating parameter, a first vehicle-mounted electrical appliance operating power, a first vehicle speed parameter, a first battery power parameter and a first driving motor power. Then, whether a preset vehicle speed limit power mode is triggered is determined according to the first working condition parameter. Then, if the vehicle speed limit power mode is triggered, the maximum power of the range extender of the vehicle is limited according to the mode type of the vehicle speed limit power mode. The driving speed and power demand of the vehicle are determined according to the obtained working condition parameter in the driving process of the vehicle, and the priority of the NHV performance of the vehicle in a medium-low speed state is higher than that of the power performance. The maximum power of the range extender of the vehicle in a medium-low speed state and with a medium-low power demand is limited through the setting of the vehicle speed limit power mode, so as to avoid the large amplitude and high frequency switching of the range extender power or working point under unnecessary working condition parameters. The range extender is in a steady state working condition under a medium-low speed working condition, the overall fuel consumption of the range extender is reduced, and the maximum power of the range extender of the vehicle in a medium-low speed state is limited, so as to improve the NHV performance of the vehicle and further provide a better driving experience for the user. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 A structural schematic diagram of a range extender power control device related to a hardware running environment of an embodiment scheme of the application;

[0042] Figure 2 A flowchart of a range extender power control method related to an embodiment scheme of the application;

[0043] Figure 3 A detailed flowchart of step S20 of an embodiment; Figure 2

[0044] ​Figure 4 For Figure 2 The detailed flow chart of an embodiment of step S30;

[0045] Figure 5 The flow chart of a complete embodiment of the power control method of the range extender involved in the embodiment of the present application.

[0046] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0047] It should be understood that the specific embodiments described herein merely serve to explain the present application and are not intended to limit the present application.

[0048] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description and should not be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" throughout the text includes three schemes, for example, A and / or B includes A technical scheme, B technical scheme, and A and B simultaneously meet the technical scheme; in addition, the technical schemes of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical schemes appears contradictory or unachievable, it should be considered that the combination of technical schemes does not exist, nor within the scope of protection claimed by the present application.

[0049] Referring to Figure 1 , Figure 1 The hardware running environment of the range extender power control device structure schematic diagram involved in the embodiment of the present application.

[0050] As Figure 1As shown, the range extender power control device can include a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to realize the connection and communication between the components. The user interface 1003 can include a display, an input unit such as a keyboard, and can also include a standard wired interface, a wireless interface. The network interface 1004 can optionally include a standard wired interface, a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 1005 can be a high-speed random access memory (RAM) memory, or a stable non-volatile memory (NVM) such as a disk memory. The memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0051] Those skilled in the art can understand that Figure 1 The structure shown in the figure does not constitute a limitation on the range extender power control device, and can include more or fewer components than the figure, or combine certain components, or different component arrangements.

[0052] As Figure 1 As shown, the memory 1005 as a storage medium can include an operating system, a data storage module, a network communication module, a user interface module, and a range extender power control program.

[0053] In Figure 1 In the range extender power control device shown, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the range extender power control device of the present application can be arranged in the range extender power control device, and the range extender power control device calls the range extender power control program stored in the memory 1005 through the processor 1001, and performs the following operations:

[0054] In the driving state of the vehicle, the first working condition parameter of the vehicle is dynamically acquired; the first working condition parameter includes one or more of the first throttle operating parameter, the first vehicle-mounted electrical appliance operating power, the first vehicle speed parameter, the first battery power parameter, and the first drive motor power;

[0055] According to the first working condition parameter, it is judged whether the preset vehicle speed limit power mode is triggered;

[0056] If the vehicle speed limited power mode is triggered, the maximum power of the range extender of the vehicle is limited according to the mode type of the vehicle speed limited power mode.

[0057] Further, the operation of limiting the maximum power of the range extender of the vehicle according to the mode type of the vehicle speed limited power mode comprises:

[0058] In response to the mode type of the vehicle speed limited power mode being a low speed limited power mode, limiting the maximum power of the range extender of the vehicle to a first proportion of the rated maximum power;

[0059] In response to the mode type of the vehicle speed limited power mode being a medium speed limited power mode, limiting the maximum power of the range extender of the vehicle to a second proportion of the rated maximum power; the second proportion is greater than the first proportion.

[0060] Further, the mode type of the vehicle speed limited power mode comprises a low speed limited power mode, and the operation of determining whether to trigger the preset vehicle speed limited power mode according to the first working condition parameter comprises:

[0061] Determining whether the first working condition parameter meets a mode triggering criterion of the low speed limited power mode, wherein the mode triggering criterion of the low speed limited power mode comprises: a time length during which the first accelerator operating parameter is less than or equal to a preset low speed triggering accelerator threshold, is greater than or equal to a preset low speed triggering accelerator time length threshold, and the first vehicle speed parameter is greater than or equal to a preset low speed triggering speed threshold, is greater than or equal to a preset low speed triggering speed time length threshold, and the first vehicle-mounted electrical appliance operating power is less than or equal to a preset low speed triggering electrical appliance demand power threshold;

[0062] If the first working condition parameter meets the mode triggering criterion of the low speed limited power mode, it is determined that the low speed limited power mode is triggered.

[0063] If the first working condition parameter does not meet the mode triggering criterion of the low speed limited power mode, it is determined that the low speed limited power mode is not triggered.

[0064] Further, the mode type of the vehicle speed limited power mode comprises a medium speed limited power mode, and the operation of determining whether to trigger the preset vehicle speed limited power mode according to the first working condition parameter further comprises:

[0065] determining whether the first working condition parameter meets the mode triggering criterion of the medium-speed limited power mode, wherein the mode triggering criterion of the low-speed limited power mode comprises: the first accelerator operation parameter being less than or equal to a preset medium-speed triggering accelerator threshold for a time period, being greater than or equal to a preset medium-speed triggering accelerator time period threshold, the first vehicle speed parameter being less than or equal to a preset medium-speed triggering speed threshold for a time period, being greater than or equal to a preset medium-speed triggering speed time period threshold, the first vehicle-mounted electrical appliance operation power being less than or equal to a preset medium-speed triggering electrical appliance demand power threshold, the first battery power parameter being greater than or equal to a preset medium-speed triggering power threshold, and the first driving motor power being less than or equal to a preset medium-speed triggering motor power threshold for a time period, being greater than or equal to a preset medium-speed triggering motor power time period threshold;

[0066] if the first working condition parameter meets the mode triggering criterion of the medium-speed limited power mode, determining to trigger the medium-speed limited power mode;

[0067] if the first working condition parameter does not meet the mode triggering criterion of the medium-speed limited power mode, determining not to trigger the medium-speed limited power mode;

[0068] wherein the preset medium-speed triggering accelerator time period threshold is greater than the preset low-speed triggering accelerator time period threshold, the preset medium-speed triggering speed threshold is greater than the preset low-speed triggering speed threshold, the preset medium-speed triggering speed time period threshold is greater than the preset low-speed triggering speed time period threshold, and the preset medium-speed triggering electrical appliance demand power threshold is greater than the preset low-speed triggering electrical appliance demand power threshold.

[0069] Further, the processor 1001 can invoke a range extender power control program stored in the memory 1005 and further perform the following operations:

[0070] After the operation of limiting the maximum power of the range extender of the vehicle, further comprising:

[0071] dynamically acquiring a second working condition parameter of the vehicle; the second working condition parameter is a working condition parameter after the vehicle triggers the vehicle speed limited power mode, and comprises one or more of a second accelerator operation parameter, a second vehicle-mounted electrical appliance operation power, a second vehicle speed parameter, a second battery power parameter, and a second driving motor power;

[0072] determining whether to exit the vehicle speed limited power mode according to the second working condition parameter;

[0073] if the vehicle speed limited power mode is exited, the limitation on the maximum power of the range extender of the vehicle is removed.

[0074] Further, the operation of determining whether to exit the vehicle speed limited power mode according to the second working condition parameter comprises:

[0075] if the mode type of the vehicle speed limiting power mode is a low speed limiting power mode, determining whether the second working condition parameter satisfies a mode exit criterion of the low speed limiting power mode, wherein the mode exit criterion of the low speed limiting power mode comprises: a time length during which the second vehicle speed parameter is greater than or equal to a preset low speed exit speed threshold, is greater than a preset low speed exit speed time length threshold, or a second vehicle-mounted electrical appliance operating power is greater than a preset low speed exit electrical appliance demand power threshold, or the second battery power parameter is less than a preset low speed exit power threshold, and a time length during which the second accelerator operating parameter is greater than a preset low speed exit accelerator threshold, is greater than a preset low speed exit accelerator time length threshold;

[0076] if the second working condition parameter satisfies the mode exit criterion of the low speed limiting power mode, determining to exit the low speed limiting power mode;

[0077] if the second working condition parameter does not satisfy the mode exit criterion of the low speed limiting power mode, determining to maintain the low speed limiting power mode;

[0078] wherein the preset low speed exit speed threshold is greater than a preset low speed trigger speed threshold, the preset low speed exit speed time length threshold is greater than a preset low speed trigger speed time length threshold, the preset low speed exit electrical appliance demand power threshold is greater than a preset low speed trigger demand power, and the preset low speed trigger accelerator threshold is less than the preset low speed exit accelerator threshold.

[0079] Further, the operation of determining whether to exit the vehicle speed limiting power mode according to the second working condition parameter further comprises:

[0080] if the mode type of the vehicle speed limiting power mode is a medium speed limiting power mode, determining whether the second working condition parameter satisfies a mode exit criterion of the medium speed limiting power mode, wherein the mode exit criterion of the medium speed limiting power mode comprises: a time length during which the second accelerator operating parameter is greater than or equal to a preset medium speed exit accelerator threshold, is greater than or equal to a preset medium speed exit accelerator time length threshold, or a time length during which the second vehicle speed parameter is greater than or equal to a preset medium speed exit speed threshold, is greater than or equal to a preset medium speed exit speed time length threshold, or a second vehicle-mounted electrical appliance operating power is greater than a preset medium speed exit electrical appliance demand power threshold, or the second battery power parameter is less than a preset medium speed exit power threshold, or a time length during which the second driving motor power is greater than or equal to a preset medium speed exit motor power threshold, is greater than or equal to a preset medium speed exit motor power time length threshold;

[0081] if the second working condition parameter satisfies the mode exit criterion of the medium speed limiting power mode, determining to exit the medium speed limiting power mode;

[0082] if the second working condition parameter does not satisfy the mode exit criterion of the medium speed limiting power mode, determining to maintain the medium speed limiting power mode;

[0083] wherein the preset medium-speed exit accelerator threshold is greater than the preset medium-speed trigger accelerator threshold, the preset medium-speed exit accelerator duration threshold is less than the preset medium-speed trigger accelerator duration threshold, the preset medium-speed exit speed threshold is greater than the preset medium-speed trigger speed threshold, the preset medium-speed exit speed duration threshold is greater than the preset medium-speed trigger speed duration threshold, the preset medium-speed exit electrical appliance demand power threshold is greater than the preset medium-speed trigger electrical appliance demand power threshold, the preset medium-speed exit electrical quantity threshold is less than the preset low-speed exit electrical quantity threshold, the preset medium-speed exit motor power threshold is greater than the preset medium-speed trigger motor power threshold, and the preset medium-speed exit motor power duration threshold is greater than the preset medium-speed trigger motor power duration threshold.

[0084] Further, the processor 1001 can invoke the range extender power control program stored in the memory 1005 and further perform the following operations:

[0085] After the operation of determining whether to trigger the preset vehicle speed limited power mode according to the first working condition parameter, the method further comprises:

[0086] If the vehicle speed limited power mode is not triggered, the maximum power of the range extender of the vehicle is kept as the rated maximum power.

[0087] Based on the above structure, various embodiments of the range extender power control method are proposed.

[0088] Reference Figure 2 , Figure 2 The flowchart of the first embodiment of the range extender power control method of the present application is shown.

[0089] In this embodiment, the execution subject of the range extender power control method can be a range extender power control device, which can be a vehicle control unit (VCU) of a vehicle. In this embodiment, the execution subject is not limited, and the description of each embodiment by the execution subject is omitted for convenience of description. In this embodiment, the range extender power control method comprises:

[0090] In step S10, the first working condition parameter of the vehicle is dynamically acquired when the vehicle is in a driving state. The first working condition parameter comprises one or more of the first accelerator operating parameter, the first vehicle-mounted electrical appliance operating power, the first vehicle speed parameter, the first battery power parameter, and the first driving motor power.

[0091] In the driving state of the vehicle, the first working condition parameter collected and transmitted by each device management system of the vehicle is dynamically acquired. The first working condition parameter is the working condition parameter before the vehicle triggers the vehicle speed limited power mode, and can comprise one or more of the first accelerator operating parameter, the first vehicle-mounted electrical appliance operating power, the first vehicle speed parameter, the first battery power parameter, and the first driving motor power.

[0092] The throttle operating parameters can be the throttle opening and the duration of the throttle opening; the vehicle electrical operating parameters can be the total power demand of each vehicle electrical appliance; the first vehicle speed parameter can be the vehicle speed (driving speed) and the duration of the vehicle speed; the first battery charge parameter can be the remaining charge (SOC) of the vehicle's power battery; and the first drive motor power can be the power demand of the vehicle's drive motor.

[0093] The time interval for dynamically acquiring operating parameters can be determined according to the actual situation. This embodiment does not impose any restrictions on this. For example, if the time interval for dynamically acquiring operating parameters is small enough, the vehicle's operating parameters can be acquired in real time to obtain vehicle operating data for determining vehicle mode triggering conditions more promptly and enhance the real-time performance of range extender power control.

[0094] The device management system is the control system corresponding to each power unit, actuator, transmission unit, control unit, etc. in the vehicle. The device management system dynamically collects the operating parameters and status parameters of the corresponding devices and sends them to the vehicle controller. For example, the device management system includes: engine management system (EMS), battery management system (BMS), drive motor controller (MCU), etc., but this embodiment does not limit it.

[0095] Step S20: Based on the first operating condition parameters, determine whether the preset vehicle speed power limiting mode is triggered;

[0096] The acquired first operating condition parameters of the vehicle are analyzed, and the vehicle speed power limiting mode is triggered based on whether the first operating condition parameters meet the trigger criteria corresponding to the vehicle speed power limiting mode. The vehicle speed power limiting mode can be a low-to-medium speed power limiting mode, which limits the maximum power of the range extender for vehicles operating at low to medium speeds with low power demand. This avoids large and frequent switching of the range extender's power or operating point under unnecessary operating conditions (moderate power demand). This allows the range extender to operate in a steady state at low to medium speeds, reducing the range extender's overall fuel consumption and improving the vehicle's NHV performance, thus providing users with a better driving experience.

[0097] The mode triggering criterion corresponding to the vehicle speed limited power mode refers to the starting and effective criterion of the vehicle speed limited power mode. If the first working condition parameter is a necessary working condition parameter, that is, the vehicle is at a high speed, or has a large power demand, the vehicle speed limited power mode is not triggered, so that the range extender can provide sufficient power for the vehicle. If the first working condition parameter is a non-necessary working condition parameter, that is, the vehicle is at a low speed, and the power demand of the vehicle is low, the vehicle speed limited power mode is triggered, so as to avoid large amplitude and high frequency switching of the power or working point of the range extender of the vehicle, and make the range extender in a steady state working condition. The vehicle speed limited power mode can include a low speed limited power mode and a medium speed limited power mode.

[0098] It should be understood that the determination of the speed parameter (traveling speed) of the vehicle as low speed, medium speed or high speed can be determined by the speed threshold value provided in the embodiments of the present application, and the determination of the power demand of the vehicle as low or high can be determined by the power increase condition and / or the threshold value corresponding to each working condition parameter provided in the embodiments of the present application.

[0099] In step S30, if the vehicle speed limited power mode is triggered, the maximum power of the range extender of the vehicle is limited according to the mode type of the vehicle speed limited power mode.

[0100] If the vehicle speed limited power mode is triggered, it indicates that the vehicle is in a non-necessary working condition parameter, that is, the mode triggering criterion corresponding to the vehicle speed limited power mode is met. In order to avoid large amplitude and high frequency switching of the power or working point of the range extender of the vehicle in the non-necessary working condition parameter, the maximum power of the range extender of the vehicle is limited according to the vehicle speed limited power mode.

[0101] The vehicle speed limited power mode can include a plurality of different mode types, and different mode types correspond to different degrees of limitation of the maximum power of the range extender.

[0102] The limitation method of the maximum power of the range extender in the vehicle speed limited power mode can be that the maximum power of the range extender is set to a specific proportion of the rated power of the range extender, or the maximum power of the range extender is set to a specific power value, which is not limited in the embodiments.

[0103] The maximum power of the range extender refers to the maximum power output that the range extender can achieve.

[0104] In the embodiment, the driving speed and power demand of the vehicle are judged according to the acquired working condition parameters in the driving process of the vehicle, the priority of the NHV performance of the vehicle at a medium or low speed is higher than the priority of the power performance, the vehicle at a medium or low speed and with a medium or low power demand is limited by the maximum power of the range extender through the setting of the speed limited power mode, so as to avoid the large amplitude and high frequency switching of the power or working point of the range extender under unnecessary working condition parameters; the range extender is kept in a steady state under a medium or low speed condition, the comprehensive fuel consumption of the range extender is reduced, and the maximum power of the range extender under a medium or low speed is limited, so as to improve the NHV performance of the vehicle and further provide a better driving experience for the user.

[0105] In an implementable embodiment, after the step of judging whether the preset speed limited power mode is triggered according to the first working condition parameter in step S20, the method further comprises:

[0106] In step S40, if the speed limited power mode is not triggered, the maximum power of the range extender of the vehicle is kept as the rated maximum power.

[0107] In the embodiment, if the speed limited power mode is not triggered, it indicates that the vehicle is in a necessary working condition parameter, the speed of the vehicle is fast or the power demand is large, that is, the speed limited power mode does not meet the mode triggering standard, so the maximum power of the range extender of the vehicle is kept as the rated power, so that the range extender can provide sufficient power for the vehicle.

[0108] In an implementable embodiment, the step of limiting the maximum power of the range extender of the vehicle according to the mode type of the speed limited power mode in step S30 comprises:

[0109] In step S31, in response to the mode type of the speed limited power mode being a low speed limited power mode, the maximum power of the range extender of the vehicle is limited to a first proportion of the rated maximum power.

[0110] If the mode type of the speed limited power mode triggered by the vehicle is a low speed limited power mode, it indicates that the driving speed of the vehicle is slow and the power demand is low, so the maximum power of the range extender of the vehicle is limited to a first proportion of the rated maximum power according to the preset power limiting scheme in the low speed limited power mode; the first proportion can be a percentage of the rated power of the range extender, for example, 30% of the rated power of the range extender, or a specific power value, for example, 18kw.

[0111] In step S32, in response to the mode type of the speed limited power mode being a medium speed limited power mode, the maximum power of the range extender of the vehicle is limited to a second proportion of the rated maximum power; the second proportion is greater than the first proportion.

[0112] If the mode type of the vehicle triggered speed limit power mode is the medium speed limit power mode, indicating that the running speed of the vehicle is medium and the power demand is medium, then according to the preset power limitation scheme in the medium speed limit power mode, the maximum power of the range extender of the vehicle is limited to a second proportion of the rated maximum power; wherein the second proportion can be a percentage of the rated power of the range extender, for example, 60% of the rated power of the range extender, or a specific power value, for example, 36kw.

[0113] It should be understood that the overall power demand of the vehicle on the range extender in the low speed limit power mode is less than the power demand in the medium speed limit power mode, and therefore the first proportion is less than the second proportion, and the second proportion is less than the rated power of the range extender of the vehicle.

[0114] In this embodiment, by classifying the mode type of the speed limit power mode, specifically classifying into low speed limit power mode and medium speed limit power mode, the maximum power of the range extender under different working condition parameters of the vehicle is optimally limited; under the premise of ensuring that the range extender can provide sufficient power for the vehicle, the maximum power of the range extender is limited in stages to avoid large and high-frequency switching of the range extender power or operating point under unnecessary working condition parameters of the vehicle; the range extender is in a steady state working condition under medium and low vehicle speed working conditions, the overall fuel consumption of the range extender is reduced, and by reducing the maximum power value of the range extender under medium and low vehicle speed, the NHV performance of the vehicle is improved, further providing better driving experience for the user.

[0115] Further, based on the first embodiment, the second embodiment of the range extender power control method of the present application is proposed, referring to Figure 3 In this embodiment, step S20 comprises:

[0116] Step S21, determining whether the first working condition parameter meets the mode triggering standard of the low speed limit power mode, wherein the mode triggering standard of the low speed limit power mode comprises: the first accelerator operating parameter being less than or equal to a preset low speed triggering accelerator threshold for a time period, being greater than or equal to a preset low speed triggering accelerator time period threshold, and the first vehicle speed parameter being greater than or equal to a preset low speed triggering speed threshold for a time period, being greater than or equal to a preset low speed triggering speed time period threshold, and the first vehicle-mounted electrical appliance operating power being less than or equal to a preset low speed triggering electrical appliance demand power threshold;

[0117] The mode type of the speed limit power mode comprises a low speed limit power mode.

[0118] determining whether the first working condition parameter meets a mode triggering criterion of a low-speed limited power mode; wherein the mode triggering criterion of the low-speed limited power mode comprises: a time length during which the first accelerator operating parameter is less than or equal to a low-speed triggering accelerator threshold, a time length during which the first accelerator operating parameter is greater than or equal to a low-speed triggering accelerator time length threshold, a time length during which the first vehicle speed parameter is less than or equal to a low-speed triggering speed threshold, a time length during which the first vehicle speed parameter is greater than or equal to a low-speed triggering speed time length threshold, and a time length during which the first vehicle-mounted electrical appliance operating power is less than or equal to a low-speed triggering electrical appliance demand power threshold.

[0119] The accelerator operating parameter can comprise an accelerator opening degree and a time length during which the accelerator opening degree is maintained, which can represent a driving power demand of the driver or an acceleration demand of the driver, and the greater the accelerator opening degree, the greater the degree of the driver's demand for the increase of the driving speed; the low-speed triggering accelerator threshold is an accelerator opening degree threshold for determining whether the low-speed limited power mode is started; if the first accelerator operating parameter is less than or equal to the low-speed triggering accelerator threshold, it indicates that the degree of the driver's demand for the increase of the driving speed is low at this time, and then the low-speed limited power mode can be triggered; the low-speed triggering accelerator time length threshold is a time length threshold for determining whether the accelerator opening degree is stable, if the time length of the accelerator opening degree is greater than or equal to the low-speed triggering accelerator time length threshold, it indicates that the accelerator opening degree is stable, and the low-speed limited power mode can be triggered according to the accelerator opening degree; if the time length of the accelerator opening degree is less than the low-speed triggering accelerator time length threshold, it indicates that the accelerator opening degree is unstable, and the accelerator opening degree may change due to the driver's misstep, so as to avoid misjudgment, the accelerator opening degree cannot be used for judgment.

[0120] The vehicle speed parameter can comprise a vehicle speed, i.e., a driving speed of the vehicle, and a time length during which the vehicle speed is maintained, and the vehicle speed can be used to directly determine whether the vehicle speed limited power mode is triggered and which type of mode is triggered; the low-speed triggering speed threshold is a vehicle speed threshold for determining whether the low-speed limited power mode is started; if the first vehicle speed parameter is less than or equal to the low-speed triggering speed threshold, it indicates that the driving speed of the vehicle is low at this time, and the driving power demand of the vehicle is low accordingly, and then the low-speed limited power mode can be triggered; the low-speed triggering speed time length threshold is a time length threshold for determining whether the vehicle speed is stable, if the time length of the vehicle speed is greater than or equal to the low-speed triggering speed time length threshold, it indicates that the vehicle speed is stable, and the low-speed limited power mode can be triggered according to the vehicle speed.

[0121] The vehicle electrical appliance running power is the total demand power of vehicle electrical appliances, for example, the total demand power of vehicle electrical appliances such as air conditioners, fans, refrigerators and the like, which can represent the non-driving power demand of the vehicle; the low-speed trigger electrical appliance demand power threshold is a vehicle electrical appliance demand power threshold for determining whether the low-speed limited power mode is started, if the first vehicle electrical appliance running power is less than or equal to the low-speed trigger electrical appliance demand power threshold, it indicates that the demand power of the vehicle electrical appliances of the vehicle is low at this time, and then the low-speed limited power mode can be triggered; if the first vehicle electrical appliance running power is greater than the low-speed trigger vehicle electrical appliance running power threshold, it indicates that the demand power of the vehicle electrical appliances of the vehicle is high at this time, for example, a refrigerated truck may need a large power for the normal operation of the refrigeration box due to the setting of the refrigeration box, and then the low-speed limited power mode is not triggered.

[0122] It should be understood that the mode trigger standard of the low-speed limited power mode has high requirements, only when all the mode trigger conditions are met, that is, the vehicle driving speed is low, the driver's demand for improving the driving speed is low, and the non-driving power demand of the vehicle is low, the vehicle can enter the low-speed limited power mode, so as to avoid the false triggering of the low-speed limited power mode and affect the normal driving of the vehicle.

[0123] For example, the low-speed trigger throttle threshold is 20%, the low-speed trigger throttle time threshold is 2s, the low-speed trigger speed threshold is 6km / h, the low-speed trigger speed time threshold is 1s, and the low-speed trigger electrical appliance demand power threshold is 3kw; that is, the mode trigger standard of the low-speed limited power mode is: the first throttle running parameter ≤ 20%, and the first throttle running parameter time ≥ 2s, and the first speed parameter ≤ 6km / h, and the first speed parameter time ≥ 1s, and the first vehicle electrical appliance running power ≤ 3kw; if the first working condition parameter does not meet any of the above conditions, it is determined that the low-speed limited power mode is not triggered.

[0124] Step S22, if the first working condition parameter meets the mode trigger standard of the low-speed limited power mode, it is determined that the low-speed limited power mode is triggered;

[0125] If the first working condition parameter meets the mode trigger standard of the low-speed limited power mode, it indicates that the first working condition parameter of the vehicle is that the vehicle driving speed is low, the driver's demand for improving the driving speed is low, and the non-driving power demand of the vehicle is low, and then it is determined that the low-speed limited power mode is triggered.

[0126] Step S23, if the first working condition parameter does not meet the mode trigger standard of the low-speed limited power mode, it is determined that the low-speed limited power mode is not triggered.

[0127] If the first working condition parameter does not meet the mode triggering standard of the low-speed limited power mode, it indicates that the first working condition parameter of the vehicle is that the vehicle driving speed is medium-high, the driver's promotion demand degree for the driving speed is medium-high, and / or the non-driving power demand degree of the vehicle is medium-high. In order to avoid entering the low-speed limited power mode and causing an impact on the normal driving of the vehicle, it is determined that the low-speed limited power mode is not triggered.

[0128] In the embodiment, by setting the mode triggering standard of the low-speed limited power mode, accurate judgment of whether to trigger the low-speed limited power mode is realized. By the comprehensive consideration of the driving speed (driving power demand) of the vehicle, the non-driving power demand and the acceleration demand of the driver in the mode triggering standard of the low-speed limited power mode, accurate judgment of whether to trigger the low-speed limited power mode is realized. Only when all the standards are met, the low-speed limited power mode can be triggered, so as to avoid false triggering of the low-speed limited power mode, ensure the normal driving of the vehicle, and further improve the driving experience.

[0129] In an implementable embodiment, step S20, the step of judging whether to trigger the preset vehicle speed limited power mode according to the first working condition parameter, further includes:

[0130] Step S24, judging whether the first working condition parameter meets the mode triggering standard of the medium-speed limited power mode, wherein the mode triggering standard of the low-speed limited power mode includes: the first accelerator operating parameter is less than or equal to the preset medium-speed triggering accelerator threshold for a time length, is greater than or equal to the preset medium-speed triggering accelerator time length threshold, the first vehicle speed parameter is less than or equal to the preset medium-speed triggering speed threshold for a time length, is greater than or equal to the preset medium-speed triggering speed time length threshold, the first vehicle-mounted electrical appliance operating power is less than or equal to the preset medium-speed triggering electrical appliance demand power threshold, the first battery power parameter is greater than or equal to the preset medium-speed triggering power threshold, and the first driving motor power is less than or equal to the preset medium-speed triggering motor power threshold for a time length, is greater than or equal to the preset medium-speed triggering motor power time length threshold.

[0131] The mode type of the vehicle speed limited power mode includes a medium-speed limited power mode.

[0132] determining whether the first working condition parameter meets the mode triggering criterion of the medium-speed limited power mode, wherein the mode triggering criterion of the medium-speed limited power mode comprises: a time length that the first accelerator operating parameter is less than or equal to the medium-speed triggering accelerator threshold, a time length that the first accelerator operating parameter is greater than or equal to the medium-speed triggering accelerator time length threshold, and a time length that the first vehicle speed parameter is less than or equal to the medium-speed triggering speed threshold, a time length that the first vehicle speed parameter is greater than or equal to the medium-speed triggering speed time length threshold, a time length that the first vehicle-mounted electrical appliance operating power is less than or equal to the medium-speed triggering electrical appliance demand power threshold, a time length that the first battery power parameter is greater than or equal to the medium-speed triggering power threshold, and a time length that the first driving motor power is less than or equal to the medium-speed triggering motor power threshold, a time length that the first driving motor power is greater than or equal to the medium-speed triggering motor power time length threshold.

[0133] The medium-speed triggering accelerator threshold is an accelerator threshold for determining whether the medium-speed limited power mode is started. If the first accelerator operating parameter is less than or equal to the medium-speed triggering accelerator threshold, it indicates that the driver's demand for increasing the driving speed is low at this time, and the medium-speed limited power mode can be triggered. The medium-speed triggering accelerator time length threshold is a time length threshold for determining whether the accelerator opening degree is stable. If the time length of the accelerator operating parameter is greater than or equal to the medium-speed triggering accelerator time length threshold, it indicates that the accelerator opening degree is stable, and the accelerator opening degree can be used to determine whether the medium-speed limited power mode is triggered. If the time length of the accelerator operating parameter is less than the medium-speed triggering accelerator time length threshold, it indicates that the accelerator opening degree is unstable, and the accelerator operating parameter cannot be used for determination. It should be understood that, in the medium-speed limited power mode, the driving power demand and the non-driving power demand of the vehicle are moderate, and therefore, in the case that the driving power demand and the non-driving power demand of the vehicle are moderate, the driver's power demand cannot be too high to avoid the vehicle being unable to provide sufficient electrical energy, and therefore, the medium-speed triggering accelerator threshold and the low-speed triggering accelerator threshold can be equal, both of which indicate that the driver's demand for increasing the driving speed is low. Since the medium-speed triggering accelerator threshold and the low-speed triggering accelerator threshold can be equal, but the comprehensive power demand of the vehicle in the medium-speed limited power mode is higher than that in the low-speed limited power mode, a more stable accelerator opening degree is required, and therefore, the medium-speed triggering accelerator time length threshold is greater than the low-speed triggering accelerator time length threshold.

[0134] The medium-speed triggering speed threshold is a vehicle speed threshold for determining whether the medium-speed limited power mode is started. If the first vehicle speed parameter is less than or equal to the medium-speed triggering speed threshold, it indicates that the driving speed of the vehicle is medium-low, and the driving power demand of the vehicle is medium-low, and the medium-speed limited power mode can be triggered. The medium-speed triggering speed duration threshold is a duration threshold for determining whether the vehicle speed is stable. If the duration of the vehicle speed is greater than or equal to the medium-speed triggering speed duration threshold, it indicates that the vehicle speed is stable, and the medium-speed limited power mode can be triggered by the vehicle speed. It should be understood that the medium-speed limited power triggering mode corresponds to the vehicle in the medium-speed driving state, and therefore the medium-speed triggering speed threshold is greater than the low-speed triggering speed threshold. Correspondingly, the comprehensive power demand of the vehicle in the medium-speed limited power mode is higher than that in the low-speed limited power mode, and therefore a more stable vehicle speed is required, and therefore the medium-speed triggering speed duration threshold is greater than the low-speed triggering speed duration threshold.

[0135] The medium-speed triggering electrical appliance demand power threshold is a vehicle electrical appliance demand power threshold for determining whether the medium-speed limited power mode is started. If the first vehicle electrical appliance operating power is less than or equal to the medium-speed triggering electrical appliance demand power threshold, it indicates that the demand power of the vehicle electrical appliance of the vehicle is medium-low, and the medium-speed limited power mode can be triggered. If the first vehicle electrical appliance operating power is greater than the medium-speed triggering electrical appliance demand power threshold, it indicates that the demand power of the vehicle electrical appliance of the vehicle is high, and the medium-speed limited power mode is not triggered. It should be understood that the comprehensive power demand of the vehicle in the medium-speed limited power mode is higher than that in the low-speed limited power mode, and therefore the medium-speed triggering electrical appliance demand power threshold is greater than the low-speed triggering electrical appliance demand power threshold.

[0136] The battery power parameter can be the remaining power (SOC) of the battery, that is, the remaining available power of the power battery of the vehicle, which can represent the power supply capacity of the power battery of the vehicle. The medium-speed triggering power threshold is a power battery remaining power threshold for determining whether the medium-speed limited power mode is started. If the first battery power parameter is greater than or equal to the medium-speed triggering power threshold, it indicates that the remaining available power of the power battery of the vehicle is relatively large, and can supply power for vehicle operation, and the medium-speed limited power mode can be triggered. If the first battery power parameter is less than the medium-speed triggering power threshold, the remaining available power of the power battery of the vehicle is relatively low, and it can be difficult to supply power for vehicle operation, and the medium-speed limited power mode is not triggered.

[0137] The driving motor power is the demand power of the driving motor of the vehicle, which can represent the demand of the driving power of the vehicle. The medium-speed trigger motor power threshold is a driving motor demand power threshold for determining whether the medium-speed limited power mode is started. If the first driving motor power is less than or equal to the preset medium-speed trigger motor power threshold, it indicates that the demand power of the driving motor of the vehicle is low at this time, and the medium-speed limited power mode can be triggered. The medium-speed trigger motor power time threshold is a time threshold for determining whether the driving motor demand power is stable. If the driving motor power time is greater than or equal to the medium-speed trigger motor power time threshold, it indicates that the driving motor demand power is stable, and the driving motor power can be used to determine whether the medium-speed limited power mode is triggered. It should be understood that if the vehicle meets the mode trigger standard of the low-speed limited power mode, the comprehensive power demand of the vehicle is low, and therefore the remaining battery capacity and the driving motor power can not be considered.

[0138] It should be understood that the mode trigger standard of the medium-speed limited power mode has a higher requirement. Only when all the mode trigger standards are met, i.e., the vehicle speed is medium-low, the driver's demand for speed improvement is medium, and the non-driving power demand of the vehicle is medium, the vehicle can enter the medium-speed limited power mode, so as to avoid the false triggering of the medium-speed limited power mode and affect the normal driving of the vehicle.

[0139] For example, the medium-speed trigger throttle threshold is 20%, the medium-speed trigger throttle time threshold is 8s, the medium-speed trigger speed threshold is 55km / h, the medium-speed trigger speed time threshold is 8s, the medium-speed trigger electrical demand power threshold is 5kw, the medium-speed trigger battery capacity threshold is 20%, the medium-speed trigger motor power threshold is 25kw, and the medium-speed trigger motor power time threshold is 8s. That is, the mode trigger standard of the medium-speed limited power mode is: the first throttle operating parameter is less than or equal to 20%, the first throttle operating parameter time is greater than or equal to 8s, the first vehicle speed parameter is less than or equal to 55km / h, the first vehicle speed parameter time is greater than or equal to 8s, the first vehicle electrical operating power is less than or equal to 5kw, the first battery capacity parameter is greater than or equal to 20%, the first driving motor power is less than or equal to 25kw, and the first driving motor time is greater than or equal to 8s. If the first working condition parameter does not meet any of the above conditions, it is determined that the medium-speed limited power mode is not triggered.

[0140] In step S25, if the first working condition parameter meets the mode trigger standard of the medium-speed limited power mode, it is determined that the medium-speed limited power mode is triggered.

[0141] If the first working condition parameter meets the mode trigger standard of the medium-speed limited power mode, it indicates that the first working condition parameter of the vehicle is that the vehicle speed is medium-low, the driver's demand for speed improvement is medium-low, the non-driving power demand of the vehicle is medium-low, and the driving power demand of the vehicle is medium-low, and it is determined that the medium-speed limited power mode is triggered.

[0142] Step S26, if the first working condition parameter does not satisfy the mode triggering standard of the medium-speed limited power mode, it is determined that the medium-speed limited power mode is not triggered.

[0143] If the first working condition parameter does not satisfy the mode triggering standard of the medium-speed limited power mode, it indicates that the first working condition parameter of the vehicle is that the vehicle driving speed is relatively high, the driver's demand for the driving speed is relatively high, the non-driving power demand of the vehicle is relatively high, and / or the driving power demand of the vehicle is relatively high. In order to avoid entering the medium-speed limited power mode and causing an impact on the normal driving of the vehicle, it is determined that the medium-speed limited power mode is not triggered.

[0144] In the embodiment, by setting the mode triggering standard of the medium-speed limited power mode, accurate determination of whether to trigger the medium-speed limited power mode is realized. By the mode triggering standard of the medium-speed limited power mode, the driving speed of the vehicle, the non-driving power demand, the driving power demand, and the acceleration demand of the driver are comprehensively considered, and accurate determination of whether to trigger the medium-speed limited power mode is realized. Only when all the standards are satisfied, the medium-speed limited power mode can be triggered, so as to avoid false triggering of the medium-speed limited power mode, ensure the normal driving of the vehicle, and further improve the driving experience.

[0145] Further, based on the first and / or second embodiments, the third embodiment of the power control method of the range extender is proposed, which is described with reference to Figure 4 In the embodiment, after step S30, the following steps are further included:

[0146] Step A10, dynamically acquiring a second working condition parameter of the vehicle; the second working condition parameter is a working condition parameter of the vehicle after triggering the vehicle speed limited power mode, and includes one or more of a second accelerator operating parameter, a second vehicle-mounted electrical appliance operating power, a second vehicle speed parameter, a second battery power parameter, and a second driving motor power;

[0147] After the vehicle triggers the vehicle speed limited power mode, the working condition parameters collected and transmitted by the device management systems of the vehicle are continuously acquired, i.e., the second working condition parameters. The second working condition parameters can include one or more of the second accelerator operating parameter, the second vehicle-mounted electrical appliance operating power, the second vehicle speed parameter, the second battery power parameter, and the second driving motor power.

[0148] The first working condition parameter and the second working condition parameter are only used to distinguish the acquisition time. The first working condition parameter is a working condition parameter acquired before triggering the vehicle speed limited power mode, and the second working condition parameter is a working condition parameter acquired after triggering the vehicle speed limited power mode. The acquisition time and the acquisition content of the two can be consistent, which is not limited in the embodiment.

[0149] Step A20, determining whether to exit the vehicle speed limited power mode according to the second working condition parameter;

[0150] After triggering the vehicle speed limited power mode, the second working condition parameter obtained dynamically is used to determine whether there is a high driving power demand, a non-driving power demand or a driver speed-up demand of the vehicle, and then determine whether to exit the vehicle speed limited power mode, so as to avoid affecting the normal driving of the vehicle.

[0151] Step A30, exiting the vehicle speed limited power mode, and then releasing the limit on the maximum power of the range extender of the vehicle.

[0152] If it is identified that there is a high driving power demand, a non-driving power demand or a driver speed-up demand of the vehicle, it is determined to exit the vehicle speed limited power mode, and then the power limit on the range extender of the vehicle is released, the maximum power of the range extender of the vehicle is set to the rated power of the range extender, and the maximum power supply level of the range extender is restored to provide sufficient electric energy for the vehicle.

[0153] In the embodiment, the second working condition parameter of the vehicle is obtained dynamically to realize real-time monitoring of the driving state of the vehicle after triggering the vehicle speed limited power mode, so as to determine whether to exit the preset vehicle speed limited power mode. If it is monitored that the second working condition parameter has a high driving power demand, a non-driving power demand or a driver speed-up demand, the preset vehicle speed limited power mode is exited, and the maximum power of the range extender of the vehicle is set to the rated power of the range extender of the vehicle to restore the maximum power supply level of the range extender and provide sufficient electric energy for the vehicle, so as to avoid the triggering of the vehicle speed limited power mode affecting the normal driving of the vehicle and improve the driving experience.

[0154] In an implementable embodiment, step A20 includes:

[0155] Step A21, if the mode type of the vehicle speed limited power mode is a low-speed limited power mode, it is determined whether the second working condition parameter meets the mode exit standard of the low-speed limited power mode, wherein the mode exit standard of the low-speed limited power mode includes: the second vehicle speed parameter being greater than or equal to a preset low-speed exit speed threshold for a time period, being greater than a preset low-speed exit speed time threshold, or the second vehicle-mounted electrical appliance operating power being greater than a preset low-speed exit electrical appliance demand power threshold, or the second battery power parameter being less than a preset low-speed exit power threshold, and the second accelerator operating parameter being greater than a preset low-speed exit accelerator threshold for a time period, being greater than a preset low-speed exit accelerator time threshold.

[0156] If the vehicle response speed limit power mode is the low-speed limit power mode, it is determined whether the second working condition parameter meets the mode exit criterion of the low-speed limit power mode. The mode exit criterion of the low-speed limit power mode includes that the second vehicle speed parameter is greater than or equal to a preset low-speed exit speed threshold for a time length, is greater than a preset low-speed exit speed time length threshold, or the second electric appliance operating power is greater than a preset low-speed exit electric appliance demand power threshold, or the second battery power parameter is less than a preset low-speed exit power threshold, and the second accelerator operating parameter is greater than a preset low-speed exit accelerator threshold for a time length, is greater than a preset low-speed exit accelerator time length threshold.

[0157] The low-speed exit accelerator threshold is an accelerator threshold for determining whether the low-speed limit power mode is exited. If the second accelerator operating parameter is greater than or equal to the low-speed exit accelerator threshold, it indicates that the driver's demand for speed increase is high at this time, and the low-speed limit power mode can be exited to avoid affecting the normal driving of the vehicle due to the opening of the low-speed limit power mode. The low-speed exit accelerator time length threshold is a time length threshold for determining whether the accelerator operating parameter is stable. If the time length of the accelerator operating parameter is greater than or equal to the low-speed exit accelerator time length threshold, it indicates that the accelerator operating parameter is stable, and the low-speed limit power mode can be exited by determining whether the low-speed limit power mode is exited through the accelerator operating parameter. It should be understood that if the low-speed trigger accelerator threshold and the low-speed exit accelerator threshold are the same value, less than or equal to the threshold, the mode is triggered, and greater than the threshold, the mode is exited, so that there is no blank area in the threshold, which makes the speed limit power mode (low-speed limit power mode) easy to exit. Therefore, in order to improve the practicability of the speed limit power mode (low-speed limit power mode), the low-speed trigger accelerator threshold is less than the low-speed exit accelerator threshold, and the low-speed trigger accelerator time length threshold and the low-speed exit accelerator time length threshold can be equal.

[0158] The low-speed exit speed threshold is a vehicle speed threshold for determining whether the low-speed limit power mode is exited. If the second vehicle speed parameter is greater than or equal to the low-speed exit speed threshold, it indicates that the driving speed of the vehicle is high at this time, and the driving power demand of the vehicle is high accordingly, and the low-speed limit power mode can be exited. The low-speed exit speed time length threshold is a time length threshold for determining whether the vehicle speed is stable. If the time length of the vehicle speed is greater than the low-speed exit speed time length threshold, it indicates that the vehicle speed is stable, and the low-speed limit power mode can be exited by determining whether the low-speed limit power mode is exited through the vehicle speed. It should be understood that the power demand of the vehicle when the low-speed limit power mode is exited will be higher than the demand power when the low-speed limit power mode is triggered. Therefore, the low-speed exit speed threshold is greater than the low-speed trigger speed threshold, and the low-speed exit speed time length threshold is greater than the low-speed trigger speed time length threshold.

[0159] The low-speed exit electric appliance demand power threshold is a vehicle-mounted electric appliance demand power threshold for judging whether the low-speed limited power mode is exited. If the second vehicle-mounted electric appliance operating power is greater than the low-speed exit electric appliance demand power threshold, it indicates that the demand power of the vehicle-mounted electric appliances of the vehicle is high at this time, for example, a refrigerated truck may need a large power for the normal operation of the refrigeration box due to the setting of the refrigeration box, and then the low-speed limited power mode can be exited. It should be understood that the power demand when the vehicle exits the low-speed limited power mode will be higher than the demand power when the low-speed limited power mode is triggered, and therefore the low-speed exit electric appliance demand power threshold is greater than the low-speed trigger demand power.

[0160] The low-speed exit electric quantity threshold is a power battery remaining electric quantity threshold for judging whether the low-speed limited power mode is exited. If the second battery electric quantity parameter is less than the low-speed exit electric quantity threshold, it indicates that the remaining available electric quantity of the power battery of the vehicle is low at this time, which may be difficult to supply power for the operation of the vehicle, and then the low-speed limited power mode is exited. It should be understood that the driving motor power is not considered when the low-speed limited power mode is exited. Because increasing the vehicle speed will inevitably cause the accelerator to be stepped on for a short time, and then the driving motor power is increased, therefore the accelerator operating parameter and the driving motor power have the same effect when judging whether to exit the low-speed limited power mode, and can not be considered.

[0161] Step A22, if the second working condition parameter meets the mode exit standard of the low-speed limited power mode, it is determined to exit the low-speed limited power mode;

[0162] If the second working condition parameter meets the mode exit standard of the low-speed limited power mode, it indicates that the second working condition parameter of the vehicle is that the driver's demand for increasing the speed is medium or high, and the vehicle speed is medium or high, or the non-traveling power demand of the vehicle is medium or high, or the available electric quantity of the power battery of the vehicle is low, and then it is determined to exit the low-speed limited power mode.

[0163] Step A23, if the second working condition parameter does not meet the mode exit standard of the low-speed limited power mode, it is determined to maintain the low-speed limited power mode;

[0164] If the second working condition parameter does not meet the mode exit standard of the low-speed limited power mode, it indicates that the second working condition parameter of the vehicle is that the vehicle speed is low, the driver's demand for increasing the speed is low, the traveling power demand of the vehicle is low, or the non-traveling power demand of the vehicle is low, and then it is determined to maintain the low-speed limited power mode.

[0165] For example, the low-speed exit throttle threshold is 25%, the low-speed exit throttle duration threshold is 2s, the low-speed exit speed threshold is 8km / h, the low-speed exit speed duration threshold is 3s, the low-speed exit electric appliance demand power threshold is 4kw, and the low-speed exit electric quantity threshold is 20%. That is, the mode exit standard of the low-speed limited power mode is: the second throttle operating parameter > 25%, and the second throttle operating parameter duration > 2s; and one or more of the following is met: the second vehicle speed parameter ≥ 8km / h, and the second vehicle speed parameter duration > 3s, the second vehicle-mounted electric appliance operating power > 4kw, or the second battery electric quantity parameter < 10%. It is determined to exit the low-speed limited power mode.

[0166] In the embodiment, by setting the mode exit standard of the low-speed limited power mode, accurate judgment of whether to exit the low-speed limited power mode is realized. Through the mode exit standard of the low-speed limited power mode, the driving speed of the vehicle, the driving power demand, the non-driving power demand, the acceleration demand of the driver, and the remaining electric quantity of the power battery are comprehensively considered, the accuracy of the judgment of whether to exit the low-speed limited power mode is improved, the vehicle can be timely powered when the range extender needs to provide large electric energy, the normal driving of the vehicle is ensured, and the driving experience is improved.

[0167] In an implementable embodiment, step A20, judging whether to exit the preset vehicle speed limited power mode according to the second working condition parameter, further includes:

[0168] Step A24, if the mode type of the vehicle speed limited power mode is a medium-speed limited power mode, judging whether the second working condition parameter meets the mode exit standard of the medium-speed limited power mode, wherein the mode exit standard of the medium-speed limited power mode includes: the duration that the second throttle operating parameter is greater than or equal to a preset medium-speed exit throttle threshold, is greater than or equal to a preset medium-speed exit throttle duration threshold, or the duration that the second vehicle speed parameter is greater than or equal to a preset medium-speed exit speed threshold, is greater than or equal to a preset medium-speed exit speed duration threshold, or the second vehicle-mounted electric appliance operating power is greater than a preset medium-speed exit electric appliance demand power threshold, or the second battery electric quantity parameter is less than a preset medium-speed exit electric quantity threshold, or the duration that the second driving motor power is greater than or equal to a preset medium-speed exit motor power threshold, is greater than or equal to a preset medium-speed exit motor power duration threshold;

[0169] If the vehicle response speed limit power mode is the medium speed limit power mode, it is judged whether the second working condition parameter meets the mode exit criterion of the medium speed limit power mode, wherein the mode exit criterion of the medium speed limit power mode includes: the time length that the second accelerator operating parameter is greater than or equal to the preset medium speed exit accelerator threshold, the time length that is greater than or equal to the preset medium speed exit accelerator time length threshold, or the time length that the second vehicle speed parameter is greater than or equal to the preset medium speed exit speed threshold, the time length that is greater than or equal to the preset medium speed exit speed time length threshold, or the second vehicle-mounted electrical appliance operating power is greater than the preset medium speed exit electrical appliance demand power threshold, or the second battery power parameter is less than the preset medium speed exit power threshold, or the time length that the second driving motor power is greater than or equal to the preset medium speed exit motor power threshold, the time length that is greater than or equal to the preset medium speed exit motor power time length threshold.

[0170] The medium speed exit accelerator threshold is an accelerator threshold for judging whether the medium speed limit power mode exits, and if the second accelerator operating parameter is greater than or equal to the medium speed exit accelerator threshold, it indicates that the driver's demand for speed improvement at this time is very high, and in order to avoid the influence on normal driving of the vehicle due to the opening of the medium speed limit power mode, the medium speed limit power mode can be exited. The medium speed exit accelerator time length threshold is a time length threshold for judging whether the accelerator opening degree is stable, and if the time length of the accelerator opening degree is greater than or equal to the medium speed exit accelerator time length threshold, it indicates that the accelerator opening degree is stable, and whether the medium speed limit power mode is exited can be judged by the accelerator opening degree. It should be understood that if the medium speed trigger accelerator threshold and the medium speed exit accelerator threshold are the same value, less than or equal to the threshold, the mode is triggered, and greater than the threshold, the mode is exited, so that there is no blank area in the threshold, which makes the speed limit power mode (medium speed limit power mode) easy to exit. Therefore, in order to improve the practicability of the speed limit power mode (medium speed limit power mode), the medium speed trigger accelerator threshold is less than the medium speed exit accelerator threshold, and because the vehicle usually reaches a high driving speed, the pursuit is fast speed-up, so the medium speed exit accelerator time length threshold can be less than the medium speed trigger accelerator time length threshold.

[0171] The medium speed exit speed threshold is a vehicle speed threshold for judging whether the medium speed limit power mode exits, and if the second vehicle speed parameter is greater than or equal to the medium speed exit speed threshold, it indicates that the driving speed of the vehicle at this time is very high, and the driving power demand of the vehicle is high accordingly, and the medium speed limit power mode can be exited. The medium speed exit speed time length threshold is a time length threshold for judging whether the vehicle speed is stable, and if the time length of the vehicle speed is greater than the medium speed exit speed time length threshold, it indicates that the vehicle speed is stable, and whether the medium speed limit power mode is exited can be judged by the vehicle speed. It should be understood that the power demand of the vehicle when the medium speed limit power mode is exited will be higher than the demand power when the medium speed limit power mode is triggered, and therefore the medium speed exit speed threshold is greater than the medium speed trigger speed threshold, and the medium speed exit speed time length threshold is greater than the medium speed trigger speed time length threshold.

[0172] The medium-speed exit electric appliance demand power threshold is a vehicle-mounted electric appliance demand power threshold for judging whether the medium-speed limited power mode is exited. If the second vehicle-mounted electric appliance operating power is greater than the medium-speed exit electric appliance demand power threshold, it indicates that the demand power of the vehicle-mounted electric appliance at this time is very high, and the medium-speed limited power mode can be exited. It should be understood that the power demand of the vehicle when the medium-speed limited power mode is exited will be higher than the demand power when the medium-speed limited power mode is triggered, and therefore the medium-speed exit electric appliance demand power threshold is greater than the medium-speed trigger electric appliance demand power threshold.

[0173] The medium-speed exit electric quantity threshold is a power battery remaining electric quantity threshold for judging whether the medium-speed limited power mode is exited. If the second battery electric quantity parameter is less than the medium-speed exit electric quantity threshold, it indicates that the remaining available electric quantity of the power battery of the vehicle at this time is low, and it can be difficult to supply power for vehicle operation, and the medium-speed limited power mode is exited. It should be understood that the power demand of the vehicle when the medium-speed limited power mode is exited will be higher than the demand power when the medium-speed limited power mode is triggered, and therefore the medium-speed exit electric quantity threshold is less than the low-speed exit electric quantity threshold.

[0174] The medium-speed exit motor power threshold is a driving motor demand power threshold for judging whether the medium-speed limited power mode is started. If the second driving motor power is greater than or equal to the preset medium-speed exit motor power threshold, it indicates that the demand power of the driving motor of the vehicle at this time is very high, and the medium-speed limited power mode can be exited. The medium-speed exit motor power time length threshold is a time length threshold for judging whether the driving motor demand power is stable. If the time length of the driving motor power is greater than or equal to the medium-speed exit motor power time length threshold, it indicates that the driving motor demand power is stable, and whether the medium-speed limited power mode is exited can be judged by the driving motor power. The medium-speed exit motor power threshold is greater than the medium-speed trigger motor power threshold, and the medium-speed exit motor power time length threshold is greater than the medium-speed trigger motor power time length threshold.

[0175] In step A25, if the second working condition parameter meets the mode exit standard of the medium-speed limited power mode, it is determined to exit the medium-speed limited power mode.

[0176] If the second working condition parameter meets the mode exit standard of the medium-speed limited power mode, it indicates that the second working condition parameter of the vehicle is a high demand for the driving speed of the driver, or the vehicle driving speed is high, or the non-driving power demand of the vehicle is high, or the available electric quantity of the power battery of the vehicle is low, and it is determined to exit the medium-speed limited power mode.

[0177] In step A26, if the second working condition parameter does not meet the mode exit standard of the medium-speed limited power mode, it is determined to maintain the medium-speed limited power mode.

[0178] If the second working condition parameter does not meet the mode exit standard of the medium-speed limited power mode, it indicates that the second working condition parameter of the vehicle has not reached a very high power demand, and it is determined to maintain the medium-speed limited power mode.

[0179] For example, the medium-speed exit throttle threshold is 70%, the medium-speed exit throttle duration threshold is 5s, the medium-speed exit speed threshold is 60km / h, the medium-speed exit speed duration threshold is 15s, the medium-speed exit electric appliance demand power threshold is 6kw, the medium-speed exit electric quantity threshold is 18%, the medium-speed exit motor power threshold is 30kw, and the medium-speed exit motor power duration threshold is 15s. That is, the mode exit standard of the medium-speed limited power mode is that one or more of the following conditions are met: the second throttle operating parameter is greater than or equal to 70%, and the second throttle operating parameter duration is greater than or equal to 5s; the second vehicle speed parameter is greater than or equal to 60km / h, and the second vehicle speed parameter duration is greater than or equal to 15s; the second on-board electric appliance operating power is greater than 6kw; the second battery electric quantity parameter is less than 18%; the second driving motor power is greater than or equal to 30kw, and the second driving motor power duration is greater than or equal to 15s. Then it is determined to exit the medium-speed limited power mode.

[0180] It should be understood that the mode triggering standard of the low-speed limited power mode and the mode exit standard of the low-speed limited power mode, and the mode triggering standard of the medium-speed limited power mode and the mode exit standard of the medium-speed limited power mode mentioned in the embodiments of the present application can be understood as uplink and downlink, that is, only after triggering the low-speed limited power mode or the medium-speed limited power mode, the mode exit standard of the corresponding low-speed limited power mode and the mode exit standard of the medium-speed limited power mode can take effect.

[0181] In the embodiment, by setting the mode exit standard of the medium-speed limited power mode, accurate judgment of whether to exit the medium-speed limited power mode is realized. Through the mode exit standard of the medium-speed limited power mode, the driving speed of the vehicle, the driving power demand, the non-driving power demand, the acceleration demand of the driver, and the remaining electric quantity of the power battery are comprehensively considered, the accuracy of the judgment of whether to exit the medium-speed limited power mode is improved, the vehicle can be timely powered when the range extender needs to provide large electric energy, the normal driving of the vehicle is ensured, and the driving experience is improved.

[0182] Further, based on the first, second and / or third embodiments described above, a more complete embodiment of the range extender power control method of the present application is proposed, which is described with reference to Figure 5 :

[0183] Before triggering the vehicle speed limit power mode, the maximum power of the range extender of the vehicle is 100% of the rated power; the execution subject is the VCU; the first working condition parameters of the vehicle are dynamically acquired, wherein the first working condition parameters include: the accelerator opening degree, the accelerator opening degree time length, the running power of the vehicle-mounted electrical appliances (the total power demand of the vehicle-mounted electrical appliances), the vehicle speed, the vehicle speed time length, the battery power parameter (SOC), the driving motor power and the driving motor power time length; the vehicle speed limit power mode includes: a low-speed limit power mode (low-speed limit power strategy) and a medium-speed limit power mode (medium-speed limit power strategy), wherein the judgment standard of the low-speed limit power mode is to meet all of the following conditions: the accelerator opening degree ≤ 20% and the time duration ≥ 2s; the demand power of the vehicle-mounted electrical appliances ≤ 3kw; the vehicle speed ≤ 6km / h and the time duration ≥ 1s; if the conditions are met, it is determined that the low-speed limit power mode of the range extender takes effect, i.e. is triggered, and the maximum power of the range extender is set to 30% of the rated power. The judgment standard of the medium-speed limit power mode is to meet all of the following conditions: the SOC ≥ 20%; the demand power of the vehicle-mounted electrical appliances ≤ 5kw; the accelerator opening degree ≤ 20% and the time duration ≥ 8s; the vehicle speed ≤ 55km / h and the time duration ≥ 8s; the driving motor power ≤ 25kw and the time duration ≥ 8s; if the conditions are met, it is determined that the medium-speed limit power mode of the range extender takes effect, i.e. is triggered, and the maximum power of the range extender is set to 60% of the rated power.

[0184] If the low-speed limit power mode of the range extender takes effect, the standard for judging that the low-speed limit power mode is invalid (exits) is: the vehicle speed ≥ 8km / h and the time duration > 3s, or the demand power of the vehicle-mounted electrical appliances > 4kw, or the SOC < 10%; and the accelerator > 25% and the time duration > 2s are met; if the conditions are met, it is determined that the low-speed limit power mode is invalid, and the maximum power of the range extender is restored to 100% of the rated power. If the medium-speed limit power mode of the range extender takes effect, the standard for judging that the medium-speed limit power mode is invalid (exits) is to meet any one or more of the following conditions: the vehicle speed ≥ 60km / h and the time duration ≥ 15s; the demand power of the vehicle-mounted electrical appliances > 6kw; the accelerator ≥ 70% and the time duration ≥ 5s; the SOC < 18%; the driving motor power ≥ 30kw and the time duration ≥ 15s; if the conditions are met, it is determined that the medium-speed limit power mode is invalid, and the maximum power of the range extender is restored to 100% of the rated power.

[0185] It should be noted that in this document, the terms "comprising", "containing", or any other similar term are intended to encompass non-exclusive inclusions, such that a process, method, article, or system that comprises a list of elements does not necessarily include only those elements, but can include other elements not expressly listed or inherent to such process, method, article, or system. Without more limitations, the element defined by the statement "comprising a range extender power control" does not exclude the existence of another identical element in the process, method, article, or system that includes the element.

[0186] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0187] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method of power control for a range extender, the method comprising: The range extender power control method comprises the following steps: In the vehicle driving state, the first working condition parameters of the vehicle are dynamically acquired; the first working condition parameters comprise multiple items of the first throttle operating parameter, the first vehicle-mounted electrical appliance operating power, the first vehicle speed parameter, the first battery power parameter and the first driving motor power; According to the first working condition parameters, it is judged whether the preset vehicle speed limited power mode is triggered; If the vehicle speed limited power mode is triggered, the mode type of the vehicle speed limited power mode is the low speed limited power mode, the maximum power of the range extender of the vehicle is limited to the first proportion of the rated maximum power; The mode type of the vehicle speed limited power mode is the medium speed limited power mode, and the maximum power of the range extender of the vehicle is limited to the second proportion of the rated maximum power; the second proportion is greater than the first proportion; The step of judging whether the preset vehicle speed limited power mode is triggered according to the first working condition parameters comprises: It is judged whether the first working condition parameters meet the mode triggering standard of the low speed limited power mode, wherein the mode triggering standard of the low speed limited power mode comprises that the first throttle operating parameter is less than or equal to the preset low speed triggering throttle threshold for a time period, is greater than or equal to the preset low speed triggering throttle time period threshold, the first vehicle speed parameter is greater than or equal to the preset low speed triggering speed threshold for a time period, is greater than or equal to the preset low speed triggering speed time period threshold, and the first vehicle-mounted electrical appliance operating power is less than or equal to the preset low speed triggering electrical appliance demand power threshold; If the first working condition parameters meet the mode triggering standard of the low speed limited power mode, it is determined that the low speed limited power mode is triggered; If the first working condition parameters do not meet the mode triggering standard of the low speed limited power mode, it is determined that the low speed limited power mode is not triggered.

2. The range extender power control method of claim 1, wherein, The mode type of the vehicle speed limited power mode comprises the medium speed limited power mode, and the step of judging whether the preset vehicle speed limited power mode is triggered according to the first working condition parameters further comprises: It is judged whether the first working condition parameters meet the mode triggering standard of the medium speed limited power mode, wherein the mode triggering standard of the medium speed limited power mode comprises that the first throttle operating parameter is less than or equal to the preset medium speed triggering throttle threshold for a time period, is greater than or equal to the preset medium speed triggering throttle time period threshold, the first vehicle speed parameter is less than or equal to the preset medium speed triggering speed threshold for a time period, is greater than or equal to the preset medium speed triggering speed time period threshold, the first vehicle-mounted electrical appliance operating power is less than or equal to the preset medium speed triggering electrical appliance demand power threshold, the first battery power parameter is greater than or equal to the preset medium speed triggering power threshold, and the first driving motor power is less than or equal to the preset medium speed triggering motor power threshold for a time period, is greater than or equal to the preset medium speed triggering motor power time period threshold; If the first working condition parameters meet the mode triggering standard of the medium speed limited power mode, it is determined that the medium speed limited power mode is triggered; If the first working condition parameters do not meet the mode triggering standard of the medium speed limited power mode, it is determined that the medium speed limited power mode is not triggered. The preset medium-speed trigger throttle time threshold is greater than the preset low-speed trigger throttle time threshold, the preset medium-speed trigger speed threshold is greater than the preset low-speed trigger speed threshold, the preset medium-speed trigger speed time threshold is greater than the preset low-speed trigger speed time threshold, and the preset medium-speed trigger electrical appliance demand power threshold is greater than the preset low-speed trigger electrical appliance demand power threshold.

3. The range extender power control method of claim 1 or 2, characterized by, After the step of triggering the vehicle speed limited power mode, the method further comprises: dynamically obtaining a second working condition parameter of the vehicle; the second working condition parameter is a working condition parameter after the vehicle triggers the vehicle speed limited power mode, and comprises one or more of a second throttle operating parameter, a second vehicle-mounted electrical appliance operating power, a second vehicle speed parameter, a second battery power parameter, and a second driving motor power; determining whether to exit the vehicle speed limited power mode according to the second working condition parameter; if the vehicle speed limited power mode is exited, the limitation on the range extender maximum power of the vehicle is removed.

4. The range extender power control method of claim 3, wherein, The step of determining whether to exit the vehicle speed limited power mode according to the second working condition parameter comprises: if the mode type in response to the vehicle speed limited power mode is a low-speed limited power mode, it is determined whether the second working condition parameter meets a mode exit standard of the low-speed limited power mode, wherein the mode exit standard of the low-speed limited power mode comprises: the second vehicle speed parameter being greater than or equal to a preset low-speed exit speed threshold for a time greater than a preset low-speed exit speed time threshold, or the second vehicle-mounted electrical appliance operating power being greater than a preset low-speed exit electrical appliance demand power threshold, or the second battery power parameter being less than a preset low-speed exit power threshold, and the second throttle operating parameter being greater than a preset low-speed exit throttle threshold for a time greater than a preset low-speed exit throttle time threshold; if the second working condition parameter meets the mode exit standard of the low-speed limited power mode, it is determined to exit the low-speed limited power mode; if the second working condition parameter does not meet the mode exit standard of the low-speed limited power mode, it is determined to maintain the low-speed limited power mode; The preset low-speed exit speed threshold is greater than the preset low-speed trigger speed threshold, the preset low-speed exit speed time threshold is greater than the preset low-speed trigger speed time threshold, the preset low-speed exit electrical appliance demand power threshold is greater than the preset low-speed trigger demand power, and the preset low-speed trigger throttle threshold is less than the preset low-speed exit throttle threshold.

5. The range extender power control method of claim 3, wherein, The step of determining whether to exit the vehicle speed limited power mode according to the second working condition parameter further comprises: if the mode type of the vehicle speed limit power mode is a medium speed limit power mode, determining whether the second working condition parameter satisfies a mode exit criterion of the medium speed limit power mode, wherein the mode exit criterion of the medium speed limit power mode comprises: a time length during which the second accelerator operation parameter is greater than or equal to a preset medium speed exit accelerator threshold value, greater than or equal to a preset medium speed exit accelerator time length threshold value, or a time length during which the second vehicle speed parameter is greater than or equal to a preset medium speed exit speed threshold value, greater than or equal to a preset medium speed exit speed time length threshold value, or the second vehicle-mounted electrical appliance operation power is greater than a preset medium speed exit electrical appliance demand power threshold value, or the second battery power parameter is less than a preset medium speed exit power threshold value, or a time length during which the second driving motor power is greater than or equal to a preset medium speed exit motor power threshold value, greater than or equal to a preset medium speed exit motor power time length threshold value; if the second working condition parameter satisfies the mode exit criterion of the medium speed limit power mode, determining to exit the medium speed limit power mode; if the second working condition parameter does not satisfy the mode exit criterion of the medium speed limit power mode, determining to maintain the medium speed limit power mode; wherein the preset medium speed exit accelerator threshold value is greater than the preset medium speed trigger accelerator threshold value, the preset medium speed exit accelerator time length threshold value is less than the preset medium speed trigger accelerator time length threshold value, the preset medium speed exit speed threshold value is greater than the preset medium speed trigger speed threshold value, the preset medium speed exit speed time length threshold value is greater than the preset medium speed trigger speed time length threshold value, the preset medium speed exit electrical appliance demand power threshold value is greater than the preset medium speed trigger electrical appliance demand power threshold value, the preset medium speed exit power threshold value is less than the preset low speed exit power threshold value, the preset medium speed exit motor power threshold value is greater than the preset medium speed trigger motor power threshold value, and the preset medium speed exit motor power time length threshold value is greater than the preset medium speed trigger motor power time length threshold value.

6. The range extender power control method of claim 1, wherein, after the step of determining whether to trigger the preset vehicle speed limit power mode according to the first working condition parameter, further comprising: if the vehicle speed limit power mode is not triggered, maintaining the maximum power of the range extender of the vehicle as the rated maximum power.

7. A range extender power control device, comprising: The device comprises a memory, a processor, and a range extender power control program stored on the memory and executable on the processor, and the range extender power control program is configured to implement the steps of the range extender power control method according to any one of claims 1 to 6.

8. A storage medium, characterized by The storage medium has a range extender power control program stored thereon, and the range extender power control program, when executed by a processor, implements the steps of the range extender power control method according to any one of claims 1 to 6.

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