Range extender power supply control method and device

Abstract

The present application provides a control method and device for power supply of a range extender. The method includes: determining the current driving mode and current road mode of the vehicle; determining the energy consumption ratio corresponding to the current driving mode according to the default energy consumption corresponding to the current driving mode and the default energy consumption of the reference driving mode; determining the battery SOC coefficient corresponding to the current road mode according to the default battery SOC value corresponding to the reference road mode; adjusting the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender according to the energy consumption ratio and the battery SOC coefficient; determining the power retention mode in which the vehicle is currently located, and controlling the start and power supply or stop of the power supply of the range extender based on the power supply control method corresponding to the power retention mode, and the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold. The present application can flexibly set the start SOC threshold of the range extender and the control methods for start and stop, improving the flexibility of vehicle use and the driving performance of the vehicle.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicles, and particularly to a control method and device for power supply of a range extender. Background Art

[0002] A range-extended electric vehicle (REEV) is a vehicle that can be powered by a battery and, when the battery power is low, an additional power is provided or the battery is charged by a range extender with an engine and a generator. When the battery power is sufficient, the vehicle is completely driven by the battery; when the battery power is insufficient, the range extender starts and functions.

[0003] In the prior art, the start of the range extender is usually associated with the driving mode and the remaining battery power of the battery pack. Under a specific driving mode, when the battery power drops to a preset value, the range extender will start generating electricity. Although this method can control the usage scenarios of the range extender to a certain extent, making the vehicle driving mode controlled by the driver and taking into account both power performance and driver experience, there are still some problems.

[0004] First, since the range extender will generate relatively large noise and vibration when the power generation power is large, and at the same time the fuel consumption will also increase, it is necessary to avoid starting high-power power generation when the battery power is low as much as possible. However, the prior art has not effectively controlled this point. Second, the start scenarios of the current range extender are relatively fixed and usually only related to the driving mode and battery power. This method cannot meet the personalized needs of different users for vehicle power performance, driving mode selection, and battery power maintenance preferences. In addition, the prior art usually sets the start SOC threshold of the range extender as a fixed value without considering the actual energy consumption state of the vehicle. This may lead to the range extender starting too late in a high-energy consumption state, and the battery and the range extender cannot jointly drive the vehicle, thus unable to effectively avoid the scenario of the range extender driving the vehicle alone with high power. Summary of the Invention

[0005] In view of this, the embodiments of this application provide a control method and device for power supply of a range extender to solve the problems in the prior art that the range extender is prone to start high-power power generation when the battery power is low, cannot meet personalized needs, and cannot effectively avoid the range extender driving the vehicle alone with high power.

[0006] In the first aspect of the embodiment of the present application, a control method for range extender power supply is provided, including: in response to a user's selection operation of the driving mode and road mode of the vehicle, determining the current driving mode and current road mode of the vehicle; determining the energy consumption ratio corresponding to the current driving mode according to the default energy consumption corresponding to the current driving mode and the default energy consumption of the preset reference driving mode; determining the battery SOC coefficient corresponding to the current road mode according to the default battery SOC value corresponding to the preset reference road mode; adjusting the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender according to the energy consumption ratio and the battery SOC coefficient; determining the power retention mode in which the vehicle is currently located, and controlling the range extender to start power supply or stop power supply based on the range extender power supply control method corresponding to the power retention mode, as well as the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold.

[0007] In the second aspect of the embodiment of the present application, a control device for range extender power supply is provided, including: a mode determination module configured to determine the current driving mode and current road mode of the vehicle in response to a user's selection operation of the driving mode and road mode of the vehicle; an energy consumption ratio determination module configured to determine the energy consumption ratio corresponding to the current driving mode according to the default energy consumption corresponding to the current driving mode and the default energy consumption of the preset reference driving mode; a battery SOC coefficient determination module configured to determine the battery SOC coefficient corresponding to the current road mode according to the default battery SOC value corresponding to the preset reference road mode; an adjustment module configured to adjust the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender according to the energy consumption ratio and the battery SOC coefficient; a control module configured to determine the power retention mode in which the vehicle is currently located, and control the range extender to start power supply or stop power supply based on the range extender power supply control method corresponding to the power retention mode, as well as the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold.

[0008] The above at least one technical solution adopted in the embodiment of the present application can achieve the following beneficial effects:

[0009] By responding to the user's selection operations for the driving mode and road mode of the vehicle, determine the current driving mode and current road mode of the vehicle; determine the energy consumption ratio corresponding to the current driving mode based on the default energy consumption corresponding to the current driving mode and the default energy consumption of the preset reference driving mode; determine the battery SOC coefficient corresponding to the current road mode based on the default battery SOC value corresponding to the preset reference road mode; adjust the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender according to the energy consumption ratio and the battery SOC coefficient; determine the power preservation mode in which the vehicle is currently located, and based on the power supply control method of the range extender corresponding to the power preservation mode, as well as the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold, control the start and power supply or stop of the range extender. This application can avoid the situation where the range extender drives the vehicle alone with high power, thereby ensuring good ride comfort and vehicle economy. This application can flexibly set the start SOC threshold of the range extender and the control method for start and stop, so that the start and working mode of the range extender more meet the needs of users and the actual operating conditions of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 It is a flowchart of the range extender power supply control method provided by the embodiment of the present application;

[0012] Figure 2 It is a structural diagram of the range extender power supply control device provided by the embodiment of the present application;

[0013] Figure 3 It is a structural diagram of the electronic device provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0015] A Range-extended Electric Vehicle (REEV) is a special type of electric vehicle. In addition to having the function of being powered by a battery pack, it is also equipped with a range extender, which consists of an engine and a generator. When the battery pack has sufficient power, the vehicle is fully driven by electricity, meeting the needs of users for intense driving. However, as the battery pack's power is consumed, the battery's discharge power gradually becomes insufficient. At this time, it is necessary to start the range extender to generate electricity to drive the vehicle, and when there is surplus generated electricity, it can also charge the battery pack.

[0016] There is a specific relationship between the overall vehicle energy consumption of the vehicle and the SOC threshold for starting the range extender. When the range extender generates electricity at high power, it will produce relatively large noise and vibration, and at the same time, fuel consumption will also increase. Therefore, in order to ensure riding comfort, vehicle power performance, and at the same time improve vehicle economy, it is necessary to avoid starting the high-power power generation of the range extender when the battery pack has low power. The solution to this problem is to adjust the SOC threshold for starting the range extender according to the overall vehicle energy consumption situation, so that when the overall vehicle energy consumption is high, the battery pack and the range extender can jointly drive the vehicle to avoid the situation where the range extender drives the vehicle alone at high power.

[0017] In the prior art, the starting conditions of the range extender are usually related to the driving mode and the remaining power of the battery pack. Under different driving modes, the vehicle's power performance, energy recovery intensity, and the overall vehicle energy consumption under the same accelerator pedal opening will be different. In some specific driving modes, when the power of the battery pack drops to a specific fixed value, the range extender will start generating electricity. Therefore, the higher the energy consumption of the driving mode, the higher the corresponding SOC threshold for starting the range extender, so that the usage scenarios of the range extender can be controlled, and the driving mode of the vehicle can also be controlled to a certain extent by the driver, while also ensuring the vehicle's power performance and driving experience. However, this method is relatively fixed in the starting scenarios of the range extender and cannot meet the personalized needs of different users for aspects such as vehicle power performance, driving mode selection, and battery pack power retention.

[0018] In view of the problems existing in the prior art, the present application proposes a new control method for the power supply of the range extender. By determining the energy consumption ratio corresponding to the current driving mode according to the default energy consumption corresponding to the current driving mode and the default energy consumption of the preset reference driving mode. In this way, it is possible to adjust the starting threshold of the range extender according to the energy consumption differences of different driving modes, better meeting the energy consumption requirements under different driving modes. By determining the battery SOC coefficient corresponding to the current road mode based on the default battery SOC value corresponding to the reference road mode. This method takes into account the impact of actual road conditions on battery consumption, making the battery more efficient under different road conditions and also more in line with user expectations. Adjust the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the starting of the range extender according to the energy consumption ratio and the battery SOC coefficient. This way can flexibly adjust the starting and stopping of the range extender to achieve the best driving effect and ride comfort. According to the current power preservation mode of the vehicle, based on the power supply control method of the range extender corresponding to the power preservation mode, as well as the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold, control the range extender to start power supply or stop power supply. This method not only enables users to select different power preservation modes according to their own habits and needs, but also ensures the optimized use of the battery and the range extender through reasonable battery SOC threshold ranges and recommended thresholds, achieving the unity of vehicle economy and driving comfort. That is to say, the power supply control method of the range extender in the present application realizes a more personalized and comfortable driving experience by adjusting the SOC threshold for starting the range extender to adapt to different driving modes, road modes and power preservation modes, while ensuring the power performance and economy of the vehicle.

[0019] The following will describe in detail the content of the technical solution of the present application in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a schematic flowchart of the power supply control method of the range extender provided by the embodiment of the present application. Figure 1 The power supply control method of can be executed by the vehicle control unit VCU. As Figure 1 shown, the power supply control method can specifically include:

[0021] S101, in response to the user's selection operation of the driving mode and road mode of the vehicle, determine the current driving mode and the current road mode of the vehicle;

[0022] S102, based on the default energy consumption corresponding to the current driving mode and the default energy consumption of the preset reference driving mode, determine the energy consumption ratio corresponding to the current driving mode;

[0023] S103, based on the default battery SOC value corresponding to the preset reference road mode, determine the battery SOC coefficient corresponding to the current road mode;

[0024] S104. Adjust the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender according to the energy consumption ratio and the battery SOC coefficient.

[0025] S105. Determine the current power retention mode of the vehicle, and based on the power supply control method of the range extender corresponding to the power retention mode, as well as the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold, control the range extender to start power supply or stop power supply.

[0026] A range extender is a device used in a Range-Extended Electric Vehicle (REEV), usually consisting of an internal combustion engine and a generator. Its main goal is to provide electricity rather than directly drive the vehicle. In a range-extended electric vehicle, the battery pack is the main power source. When the battery is fully charged, the discharge power of the battery pack is sufficient to meet the driving needs of the vehicle, including more intense driving situations. However, as the battery charge level drops, the discharge power of the battery pack may not be sufficient to meet the driving needs of the vehicle. At this time, the range extender will start, and the engine drives the generator to generate electricity to provide additional power for the vehicle to continue moving forward. If there is surplus power generation, the range extender can also charge the battery pack for subsequent use.

[0027] The presence of the range extender greatly increases the driving range of the electric vehicle, solves the problem of limited battery power, and at the same time maintains the advantages of low noise and low emissions of the electric vehicle. However, when the power generation power of the range extender is large, more noise and vibration will be generated, and the fuel consumption will also increase. Therefore, it is necessary to carefully control the start and stop of the range extender to maintain good ride comfort, vehicle power performance, and vehicle economy.

[0028] SOC is the abbreviation of State of Charge, which is used to represent the "battery charge state" or "power state", and is an important parameter for describing the power state of the battery pack of an electric vehicle or a range-extended electric vehicle. In an electric vehicle or a range-extended electric vehicle, the SOC value mainly represents the ratio of the current remaining charge of the battery pack to the full charge of the battery pack.

[0029] For example, a battery pack with an SOC value of 100% means the battery pack is fully charged, while a battery pack with an SOC value of 0% means the battery pack is completely discharged. When the SOC value is between these two extreme values, it represents the remaining charge of the battery pack. For example, an SOC value of 50% means the remaining charge of the battery pack is half of its total capacity.

[0030] In a range-extended electric vehicle, the State of Charge (SOC) value is used to determine when to start the range extender and the amount of electric power that the range extender should provide. For example, when the SOC value drops to a set threshold, the range extender starts to provide power, and when the SOC value rises above the set threshold, the range extender stops working.

[0031] In some embodiments, in response to a user's selection operation of the vehicle's driving mode and road mode, the current driving mode and current road mode of the vehicle are determined, including: in response to a user's click operation on the screen of the in-vehicle infotainment system installed in the vehicle cockpit, determining the current driving mode and current road mode selected by the user; wherein, the driving modes of the vehicle include an energy-saving mode, a comfort mode, and a sport mode, and the road modes include an urban mode, a highway mode, and a mountain mode.

[0032] Specifically, an in-vehicle infotainment system (IVI) is installed in the cockpit of the range-extended electric vehicle. The screen of the IVI system is installed in the vehicle cockpit, and the user can operate it through a touch screen. The user can select their preferred driving mode and road mode by clicking on this screen. In practical applications, the selection of the driving mode can include: an energy-saving mode, a comfort mode, and a sport mode. The selection of the road mode can include: an urban mode, a highway mode, and a mountain mode.

[0033] The IVI system provides various information and entertainment services for vehicle occupants, such as functions like navigation, music, television, Internet access, in-vehicle hotspot, voice control, mobile phone integration, etc. The IVI system of new energy vehicles often also includes the display of relevant information such as the battery charge status and the remaining mileage, which can help the driver better understand and manage the vehicle's power status.

[0034] In practical applications, to meet the different driving needs of users, the IVI system provides a user interface for the user to select and set different driving modes, such as energy-saving, comfort, sport, etc. These driving modes have different response strategies for the accelerator pedal and brake pedal, energy recovery strategies, and acceleration performances. These differences will result in different overall vehicle energy consumptions for the same driving behavior of the user in different driving modes. Additionally, the driving mode also reflects the user's driving style to a certain extent. Therefore, for the user to have a better vehicle use experience, the SOC threshold for starting the range extender in high-energy-consuming driving modes is often set relatively high.

[0035] Meanwhile, the user can also select and set different road modes according to the actual road conditions, such as urban, highway, mountain, etc. These road modes also have different acceleration and brake pedal response strategies, as well as different torque distribution strategies and energy recovery strategies. That is, the user can select and set different road modes such as urban, highway, mountain, etc. on the interaction interface of the IVI system. Different road modes also have different acceleration and brake pedal response strategies, as well as different torque distribution strategies and energy recovery strategies. And when the vehicle is driving on different roads, it is greatly affected by road conditions, and the vehicle energy consumption difference is also large. Generally speaking, the relationship of vehicle energy consumption difference under different roads is as follows: energy consumption during mountain driving ≥ energy consumption during highway driving ≥ energy consumption during urban driving.

[0036] It should be noted that in the actual application scenario, the embodiments of the present application are not limited to the user selecting the current driving mode and road mode of the vehicle by clicking and sliding operations on the IVI system screen. The embodiments of the present application can also set the voice control method, that is, by receiving the voice signal sent by the user, parsing the voice signal, obtaining the voice command carried in the voice signal, and determining the driving mode and road mode that the user wants to switch or select according to the voice command. It should be understood that the selection method of the vehicle's current driving mode and current road mode is not limited to the methods provided in the above embodiments, and those skilled in the art can select a suitable method for vehicle control according to the actual vehicle scenario. The above control methods do not constitute a limitation to the technical solution of the present application.

[0037] Furthermore, different driving modes and road modes affect the energy consumption state of the vehicle. For example, at the same acceleration pedal opening, different driving modes will have different torque output characteristics. In addition, factors such as the vehicle usage scenario (such as urban, highway or mountain, etc.), ambient temperature, and the user's driving habits will also affect the energy consumption state of the vehicle. When the vehicle is in a high energy consumption state, if the remaining power of the battery pack is more, then the user's driving experience will be better, and at the same time, the fuel economy will also be better.

[0038] On this basis, the main purpose of the technical solution of the present application is: according to the combination of the driving mode (energy-saving, comfortable, sport) and road mode (urban, highway, mountain) set by the user, these combinations reflect the energy consumption characteristics of the vehicle. At the same time, by obtaining information such as ambient temperature and the number of vehicle occupants (these information reflect the energy consumption state during the subsequent driving of the vehicle to a certain extent), the system can provide the user with a settable range of the extender start threshold. Within this range, the user can freely adjust the extender start threshold they hope for, so as to better control the energy consumption of the electric vehicle, and enable the user to better adjust the SOC threshold for the extender start according to personal preferences and the actual driving environment, so as to improve the driving experience and the energy efficiency of the vehicle.

[0039] In some embodiments, determining the energy consumption ratio corresponding to the current driving mode based on the default energy consumption corresponding to the current driving mode and the default energy consumption of a preset reference driving mode includes: pre-obtaining the default energy consumption of the vehicle corresponding to different driving modes under the working condition test conditions, and calculating the ratio between the default energy consumption of the current driving mode and the default energy consumption of the reference driving mode to obtain the energy consumption ratio, where the reference driving mode is the energy-saving mode.

[0040] Specifically, in the embodiments of the present application, a range-extended electric vehicle is taken as an example. The vehicle has three main driving modes: energy-saving mode, comfort mode, and sport mode. The goals and operating parameters of each driving mode are optimized to adapt to different driving conditions and passenger preferences. Each driving mode has its corresponding default energy consumption, and the default energy consumption is pre-obtained based on specific working condition test conditions.

[0041] Furthermore, for the determination of the energy consumption ratio, the embodiments of the present application take the default energy consumption of the energy-saving mode as the energy consumption reference value. Through the chassis dynamometer test, the energy consumption status of the vehicle under the World Light Vehicle Test Cycle (WLTC) working conditions can be obtained, which are A1 (the default energy consumption in the energy-saving mode), A2 (the default energy consumption in the comfort mode), and A3 (the default energy consumption in the sport mode). Generally, the default energy consumptions of these three driving modes satisfy the following relationship: A1 < A2 < A3, and there is a clear proportional relationship between A1, A2, and A3.

[0042] Therefore, when determining the energy consumption ratio corresponding to the current driving mode, the embodiments of the present application take the energy-saving mode as the reference driving mode, that is, take the default energy consumption A1 in the energy-saving mode as the energy consumption reference value. Then, calculate the ratio between the default energy consumption of other modes and the energy consumption reference value. For example, for the comfort mode, the proportional relationship between its default energy consumption A2 and the energy consumption reference value A1 is A = A2 / A1; for the sport mode, the proportional relationship between its default energy consumption A3 and the energy consumption reference value A1 is B = A3 / A1.

[0043] Through the above calculations, the energy consumption ratio between the default energy consumption of the current driving mode and the default energy consumption (energy consumption reference value) of the reference driving mode is obtained. This energy consumption ratio will be used to adjust and control the basic battery SOC threshold range and the recommended basic battery SOC threshold for starting the range extender, so as to better adapt to the user's driving mode and road mode selection, and improve the power efficiency and usage economy of the vehicle.

[0044] In some embodiments, determining the battery SOC coefficient corresponding to the current road mode based on the default battery SOC value corresponding to the preset reference road mode includes: obtaining the default battery SOC value corresponding to the preset reference road mode, determining the multiple relationship between the default battery SOC value of the current road mode and the default battery SOC value of the reference road mode, and determining the battery SOC coefficient based on the multiple relationship, where the reference road mode is the urban mode.

[0045] Specifically, in the embodiments of the present application, the urban mode is used as the reference road mode, and the default battery SOC value corresponding to this mode is obtained. The default battery SOC value in the urban mode is used as the reference SOC value, that is, the minimum battery power that needs to be maintained in the urban mode. Below, based on the reference SOC value, the relationship between the minimum battery SOC value that the vehicle needs to maintain in other road modes and the reference SOC value will be determined.

[0046] In different road modes, even if the same driving mode and driving behavior are adopted, the possible energy consumption states may be different. Theoretically, the energy consumption during mountain driving is the highest, followed by highway driving, and the energy consumption during urban driving is the lowest. At the same time, the probability and quantity of charging piles in places such as urban areas, highways, and mountains also decrease in turn. Therefore, in order to ensure the driving safety and power performance of the vehicle, the remaining battery power SOC values that the vehicle needs to maintain during urban, highway, and mountain driving should also increase in turn.

[0047] Furthermore, in the embodiments of the present application, by obtaining the multiple relationships between the minimum battery SOC values in the other two modes (i.e., the highway road mode and the mountain road mode) and the reference SOC value (i.e., the minimum battery SOC value in the urban mode), the battery SOC coefficients can be obtained. For example, if the minimum battery SOC value in the highway road mode is C times the reference SOC value, and the minimum battery SOC value in the mountain road mode is D times the reference SOC value, then C and D here respectively represent the battery SOC coefficients corresponding to the highway road mode and the mountain road mode.

[0048] According to the technical solution provided by the embodiments of the present application, by setting the urban mode as the reference road mode and calculating the corresponding battery SOC coefficients according to different road modes, an adaptive battery management strategy is effectively provided for the vehicle under different road conditions, thereby ensuring the power performance and use safety of the vehicle.

[0049] In some embodiments, the method further includes: collecting the external environmental temperature of the vehicle using an environmental temperature sensor, and determining the temperature energy consumption influence coefficient corresponding to the current external environmental temperature of the vehicle according to the mapping relationship between the preset external environmental temperature and the temperature energy consumption influence coefficient.

[0050] Specifically, the SOC threshold for the range extender to start is affected not only by factors such as driving mode and road mode, but also by other external factors (such as external ambient temperature). Since the ambient temperature outside the vehicle affects the battery performance and energy consumption, therefore, in the embodiments of the present application, it is also necessary to consider the impact on the discharge performance and energy consumption of the battery when the external ambient temperature exceeds the optimal charge-discharge temperature range (10 degrees - 30 degrees) of the battery pack.

[0051] Further, in order to determine the impact of the external ambient temperature on the vehicle's overall energy consumption status, an ambient temperature sensor is installed on the vehicle to continuously monitor the external ambient temperature. When the ambient temperature exceeds the optimal charge-discharge temperature range of the battery pack, referring to the battery characteristic data provided by the battery supplier, a temperature energy consumption impact coefficient E is calculated. In practical applications, the temperature energy consumption impact coefficient E is not a fixed value but changes with the ambient temperature. In the embodiments of the present application, a mapping relationship is preset, and this mapping relationship is used to represent the corresponding relationship between the external ambient temperature and the temperature energy consumption impact coefficient, that is, each external ambient temperature corresponds to a temperature energy consumption impact coefficient. Therefore, based on this mapping relationship, it is possible to determine what the corresponding temperature energy consumption impact coefficient is at any given external ambient temperature.

[0052] In one example, the ambient temperature sensor on the range-extended vehicle continuously monitors the external ambient temperature. The optimal charge-discharge temperature range of the battery pack is 10 degrees - 30 degrees. When the temperature exceeds this range, the charge-discharge performance deteriorates. At this time, the battery power of the battery pack drops rapidly, and the discharge power is also insufficient. After the ambient temperature exceeds the optimal charge-discharge temperature range of the battery pack, the temperature energy consumption impact coefficient E is confirmed and adjusted according to the battery characteristics provided by the battery supplier.

[0053] In some embodiments, the method further includes: using a vehicle seat sensor to identify the number of vehicle occupants, and determining the occupant number energy consumption impact coefficient corresponding to the current number of vehicle occupants of the vehicle according to the preset mapping relationship between the number of vehicle occupants and the occupant number energy consumption impact coefficient.

[0054] Specifically, the SOC threshold for the range extender to start is affected not only by factors such as driving mode and road mode, but also by other external factors (such as the number of vehicle occupants). In practical applications, there is a positive relationship between the number of vehicle occupants and the overall mass and energy consumption of the vehicle: that is, the heavier the vehicle mass, the higher its energy consumption usually is. To accurately quantify this impact, the embodiments of the present application introduce a new parameter, namely the occupant number energy consumption impact coefficient F.

[0055] In one example, the present application uses vehicle seat sensors to identify the number of vehicle occupants. When there is no one or only the driver in the vehicle, it is considered that the vehicle energy consumption is not affected by the number of vehicle occupants. In this case, the occupant number energy consumption impact coefficient F can be set to 1. Then, based on the mapping relationship between the number of vehicle occupants and the occupant number energy consumption impact coefficient F preset in the embodiments of the present application, the corresponding occupant number energy consumption impact coefficient F is determined when there are any given number of occupants in the vehicle.

[0056] According to the technical solution provided by the embodiments of the present application, the embodiments of the present application dynamically adjust the SOC threshold for starting the range extender by real-time monitoring of the external environment temperature and the number of vehicle occupants, and combining the corresponding mapping relationship, so as to further adjust according to the above factors (driving mode, road mode, external environment temperature and the number of vehicle occupants), enabling it to adapt to different vehicle modes and external conditions. This can not only ensure that the battery operates within the optimal temperature range, thereby optimizing its performance, but also more accurately predict and manage the vehicle energy consumption, thus optimizing the vehicle fuel economy. At the same time, this also enables the system to more flexibly adapt to various different driving conditions, further enhancing the user's driving experience.

[0057] In some embodiments, adjusting the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender includes: multiplying the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption impact coefficient, the occupant number energy consumption impact coefficient, and the basic battery SOC threshold range to obtain the adjusted basic battery SOC threshold range; multiplying the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption impact coefficient, the occupant number energy consumption impact coefficient, and the basic battery SOC recommended threshold to obtain the adjusted basic battery SOC recommended threshold.

[0058] Specifically, based on all the data and influencing factors calculated above (i.e., the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption impact coefficient, the occupant number energy consumption impact coefficient), a recommended battery SOC threshold is determined for each combination of driving mode and road mode. The user can set their own SOC threshold and power retention mode on the interaction interface of the IVI system, and these settings will be stored when the vehicle is powered off for use when starting the vehicle next time.

[0059] In practical applications, there is no mandatory association between the driving mode and the road mode. Therefore, users can set them separately according to their driving preferences and the actual road conditions, resulting in 9 combination rules for the driving mode and the road mode. Taking the 20%-80% interval as the basic SOC threshold interval that users can set, the recommended SOC thresholds for the range extender to start and the interval range that allows users to freely adjust can be obtained under the 9 combination rules. As shown in Table 1, pairwise combinations of the driving mode and the road mode generate the following 9 SOC threshold intervals that users can set and the recommended SOC thresholds for the range extender to start:

[0060] Table 1 SOC Threshold Intervals and Recommended SOC Thresholds under Different Combination Rules

[0061]

[0062]

[0063] In one example, taking a battery pack with a capacity of 40 kWh as an example, the 20%-80% interval of the remaining battery power of the vehicle battery pack is used as the basic SOC threshold interval that users can set. That is, within the SOC threshold interval of 20%-80%, taking the driving situation in the energy-saving mode and the urban mode as an example, when the number of occupants ≤ 1 and the ambient temperature is between 10°C and 30°C, based on the calculation of the system of the present application, it can be recommended that users set the SOC threshold to 20%. When the battery pack capacity is small, in order to ensure that the battery pack has enough power to support vehicle driving when the range extender starts, the basic recommended SOC threshold can be appropriately increased.

[0064] In practical applications, when users switch the combination of the driving mode and the road mode, the settable interval of the SOC threshold for the range extender to start and the recommended SOC threshold will be recalculated according to the formula in Table 1 above. That is to say, the SOC threshold for the range extender to start will be arbitrarily switched according to different combination methods of the driving mode and the road mode. The SOC threshold for the range extender to start set by the user under each combination will be stored after being set. After the user switches the combination, the SOC setting threshold of the settable SOC threshold interval that the user set under the previous combination will be displayed. If the user does not adjust the recommended SOC threshold under this combination (that is, the user does not manually adjust the SOC threshold for the range extender to start), then, the recommended SOC threshold calculated based on Table 1 will be used as the default recommended value, and the default recommended value will be displayed to the user through the screen.

[0065] In some embodiments, based on the power generation unit power supply control method corresponding to the power retention mode, and the adjusted basic battery SOC threshold range and the recommended basic battery SOC threshold, the start or stop of the power generation unit is controlled, including: when the vehicle enters the forced power retention mode, the power generation unit power supply control method includes that when the actual battery SOC value of the vehicle is less than or equal to the adjusted recommended basic battery SOC threshold, the power generation unit is controlled to start, and the power generation unit is used to supply power to the motor and battery of the vehicle; when the actual battery SOC value is greater than the adjusted recommended basic battery SOC threshold and exceeds the upward adjustment range corresponding to the adjusted recommended basic battery SOC threshold, the power generation unit is controlled to stop supplying power.

[0066] Specifically, by comprehensively applying the power generation unit power supply control method corresponding to the power retention mode, and the adjusted basic battery SOC threshold range and the recommended basic battery SOC threshold in the embodiments of the present application, the start and stop of the power generation unit can be effectively controlled to optimize the energy use of the vehicle.

[0067] When the vehicle enters the forced power retention mode, the power generation unit power supply control method will change. In this mode, if the actual battery SOC value of the vehicle is less than or equal to the adjusted recommended basic battery SOC threshold, the system will start the power generation unit and use the power generation unit to supply power to the motor and battery of the vehicle. This can ensure that the vehicle can obtain sufficient power support when necessary. On the other hand, when the actual battery SOC value is greater than the adjusted recommended basic battery SOC threshold and exceeds the upward adjustment range corresponding to the recommended threshold, the system will control the power generation unit to stop supplying power. This can avoid unnecessary power waste and also help protect the service life of the battery.

[0068] It should be noted that in the forced power retention mode, the primary goal of the power generation unit control method is to maintain the battery SOC value above the set value, that is, in the forced power retention mode, the system will control the SOC value of the battery to always remain above the set value. If the SOC value of the battery drops below the set value, the power generation unit will start; when the SOC value of the battery rises again, exceeds the set start value and reaches a certain value (such as a 5% increase in the set value), the system will control the power generation unit to shut down. Such a control method can effectively protect the battery, extend its service life, while optimizing energy use, improving the overall performance and efficiency of the vehicle while ensuring the power demand of the vehicle.

[0069] In some embodiments, based on the power generation control method of the range extender corresponding to the power preservation mode, as well as the adjusted basic battery SOC threshold range and the recommended basic battery SOC threshold, the start or stop of the range extender for power supply is controlled, including: when the vehicle enters the intelligent power preservation mode, the power generation control method of the range extender includes that when the actual battery SOC value of the vehicle is less than or equal to the adjusted recommended basic battery SOC threshold, the range extender is controlled to start, and the range extender is used to supply power to the vehicle's motor and battery; the power generation power of the range extender is dynamically adjusted according to the actual driving state of the vehicle, so as to control the actual battery SOC value to change within a preset range along the adjusted recommended basic battery SOC threshold; when the actual battery SOC value is greater than the adjusted recommended basic battery SOC threshold and exceeds the upward adjustment range corresponding to the adjusted recommended basic battery SOC threshold, the range extender is controlled to stop supplying power.

[0070] Specifically, in the intelligent power preservation mode, a control method for the range extender that focuses on fuel economy is implemented. When the actual battery SOC value ≤ the set value, the range extender starts, and the power generation power is adjusted based on the driving conditions to achieve the floating of the SOC around the set value. Subsequently, it can be slightly lower than the set value to a certain extent, but it is ensured that the SOC value cannot be lower than the set start value by a certain value (5%, TBC), that is, it cannot decrease by more than 5% based on the set value. When the SOC value rises beyond the set start value by a certain value (5%, TBC), the range extender is controlled to stop.

[0071] In other words, in the intelligent power preservation mode, when the actual battery SOC value of the vehicle is less than or equal to the adjusted recommended basic battery SOC threshold, the system will start the range extender and use the range extender to supply power to the vehicle's motor and battery. In this mode, the main goal of the system is to achieve fuel economy, and the power generation power of the range extender is dynamically adjusted according to the actual driving state of the vehicle, that is, in the intelligent power preservation mode, the system adjusts the power generation power according to the driving conditions to make the battery SOC value float around the set value. In this way, the system can control the actual battery SOC value to change within a preset range along the adjusted recommended basic battery SOC threshold.

[0072] To further ensure that the SOC value of the battery will not be too low, the system will start the range extender when the SOC value drops below the set value. Although the SOC value can drop slightly based on the set value, the system will ensure that the SOC value will not be lower than the set start value by a certain value (such as dropping more than 5%). In this way, the system can achieve the floating of the SOC value within the upper and lower ranges of the set value. On the other hand, when the actual battery SOC value is greater than the adjusted recommended basic battery SOC threshold and exceeds the upward adjustment range corresponding to this recommended threshold, the system will control the range extender to stop supplying power. In this way, when the battery is fully charged, the operation of the range extender can be stopped to avoid unnecessary energy waste.

[0073] It should be noted that the driving mode, road mode, and power retention mode in the embodiments of the present application all have default modes. The default mode of the driving mode is the comfort mode, the default mode of the road mode is the urban area mode, and the default mode of the power retention mode is forced power retention. Users can set the corresponding driving mode, road mode, and power retention mode on the interaction interface, and the set state will be stored when the vehicle is powered off. The state set by the user last time will be displayed when the vehicle is powered on next time.

[0074] When the vehicle is powered on for the first time, the driving mode, road mode, and power retention mode are respectively the default modes, that is, the driving mode is comfort, the road mode is urban area, and the power retention mode is forced power retention. At this time, the adjustable range of the SOC threshold for starting the range extender is 20% - 80%, and the specific starting value is the recommended SOC threshold of 20%. The power retention mode is forced power retention, and users can set the SOC threshold and power retention mode they want within this range.

[0075] According to the technical solution provided by the embodiments of the present application, the technical solution of the present application has the following remarkable advantages and effects:

[0076] First of all, according to the combination of the driving mode and road mode selected by the user, the present application provides an adjustable range of the range extender start threshold for the user. This design enables users to set the most suitable SOC threshold according to their own needs and preferences, greatly improving the flexibility of vehicle use.

[0077] Secondly, the present application also provides a default recommendation method for the SOC threshold for starting the range extender that can reflect the best performance of the vehicle. This method can recommend the optimal range extender start threshold according to the combination of the driving mode and road mode selected by the user. In this way, the driving performance of the vehicle can be effectively improved, and it is also convenient for users to use.

[0078] Thirdly, the SOC threshold set by the user, as well as the driving mode and road mode, will be stored by the system. Therefore, users can quickly adjust and switch the settings according to the actual situation, further improving the convenience and personalization of vehicle use.

[0079] In addition, users can set the power retention mode to achieve precise control of the battery pack power. This mode enables users to better control the remaining power of the battery and meet different driving needs.

[0080] Finally, the technical solution of the present application enables users to set the extender startup threshold by themselves, thereby controlling the remaining power of the battery pack. This method not only facilitates users to use the vehicle according to their own charging conditions and driving habits, but also greatly increases the controllability and fun of the vehicle. This method not only meets the needs of different users, but also fully exploits the characteristics of the range extender vehicle. Therefore, the technical solution of the present application greatly improves the vehicle performance and user experience by providing a flexible extender control method and an accurate battery management strategy, meeting the diverse needs of different users.

[0081] The following is an apparatus embodiment of the present application, which can be used to execute the method embodiment of the present application. For details not disclosed in the apparatus embodiment of the present application, please refer to the method embodiment of the present application.

[0082] Figure 2 is a schematic structural diagram of an extender power supply control device provided by an embodiment of the present application. As Figure 2 shown, the extender power supply control device includes:

[0083] A mode determination module 201, configured to determine the current driving mode and the current road mode of the vehicle in response to a user's selection operation of the driving mode and the road mode of the vehicle;

[0084] An energy consumption ratio determination module 202, configured to determine the energy consumption ratio corresponding to the current driving mode based on the default energy consumption corresponding to the current driving mode and the default energy consumption of a preset reference driving mode;

[0085] A battery SOC coefficient determination module 203, configured to determine the battery SOC coefficient corresponding to the current road mode based on the default battery SOC value corresponding to the preset reference road mode;

[0086] An adjustment module 204, configured to adjust the basic battery SOC threshold interval and the basic battery SOC recommended threshold for controlling the startup of the extender according to the energy consumption ratio and the battery SOC coefficient;

[0087] A control module 205, configured to determine the power preservation mode in which the vehicle is currently located, and control the extender to start power supply or stop power supply based on the extender power supply control method corresponding to the power preservation mode, as well as the adjusted basic battery SOC threshold interval and the basic battery SOC recommended threshold.

[0088] In some embodiments, Figure 2 the mode determination module 201 of determines the current driving mode and the current road mode selected by the user in response to a click operation on the screen of the in-vehicle infotainment system installed in the vehicle cockpit; wherein, the driving modes of the vehicle include an energy-saving mode, a comfort mode, and a sport mode, and the road modes include an urban mode, a highway mode, and a mountain mode.

[0089] In some embodiments, Figure 2 the energy consumption ratio determination module 202 pre-obtains the default energy consumption of the vehicle corresponding to different driving modes under the working condition test conditions, calculates the ratio between the default energy consumption of the current driving mode and the default energy consumption of the reference driving mode, and obtains the energy consumption ratio, where the reference driving mode is the energy-saving mode.

[0090] In some embodiments, Figure 2 the battery SOC coefficient determination module 203 of obtains the default battery SOC value corresponding to the preset reference road mode, determines the multiple relationship between the default battery SOC value of the current road mode and the default battery SOC value of the reference road mode, and determines the battery SOC coefficient according to the multiple relationship, where the reference road mode is the urban area mode.

[0091] In some embodiments, Figure 2 the temperature energy consumption influence coefficient determination module 206 of the vehicle collects the external environment temperature of the vehicle by using an ambient temperature sensor, and determines the temperature energy consumption influence coefficient corresponding to the current external environment temperature of the vehicle according to the mapping relationship between the preset external environment temperature and the temperature energy consumption influence coefficient.

[0092] In some embodiments, Figure 2 the occupant number energy consumption influence coefficient determination module 207 of the vehicle identifies the number of vehicle occupants by using a vehicle seat sensor, and determines the occupant number energy consumption influence coefficient corresponding to the current number of vehicle occupants of the vehicle according to the mapping relationship between the preset number of vehicle occupants and the occupant number energy consumption influence coefficient.

[0093] In some embodiments, Figure 2 the adjustment module 204 multiplies the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption influence coefficient, the occupant number energy consumption influence coefficient, and the basic battery SOC threshold interval to obtain the adjusted basic battery SOC threshold interval; multiplies the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption influence coefficient, the occupant number energy consumption influence coefficient, and the basic battery SOC recommended threshold to obtain the adjusted basic battery SOC recommended threshold.

[0094] In some embodiments, Figure 2 When the vehicle enters the forced power preservation mode, the power supply control method of the range extender of the control module 205 includes that when the actual battery SOC value of the vehicle is less than or equal to the adjusted basic battery SOC recommended threshold, the range extender is controlled to start, and the range extender is used to supply power to the motor and battery of the vehicle; when the actual battery SOC value is greater than the adjusted basic battery SOC recommended threshold and exceeds the upward adjustment interval corresponding to the adjusted basic battery SOC recommended threshold, the range extender is controlled to stop supplying power.

[0095] In some embodiments, Figure 2When the vehicle enters the intelligent power conservation mode, the power supply control method of the range extender of the control module 205 includes: when the actual battery SOC value of the vehicle is less than or equal to the adjusted recommended threshold of the basic battery SOC, controlling the range extender to start and using the range extender to supply power to the motor and battery of the vehicle; dynamically adjusting the power generation power of the range extender according to the actual driving state of the vehicle so as to control the actual battery SOC value to change within a preset range along the adjusted recommended threshold of the basic battery SOC; when the actual battery SOC value is greater than the adjusted recommended threshold of the basic battery SOC and exceeds the upward adjustment range corresponding to the adjusted recommended threshold of the basic battery SOC, controlling the range extender to stop power supply.

[0096] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution is prior or posterior, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0097] Figure 3 is a schematic structural diagram of the electronic device 3 provided by the embodiment of the present application. As Figure 3 shown, the electronic device 3 of this embodiment includes: a processor 301, a memory 302, and a computer program 303 stored in the memory 302 and executable on the processor 301. When the processor 301 executes the computer program 303, the steps in the above-mentioned various method embodiments are implemented. Alternatively, when the processor 301 executes the computer program 303, the functions of each module / unit in the above-mentioned various device embodiments are implemented.

[0098] Exemplarily, the computer program 303 can be divided into one or more modules / units. The one or more modules / units are stored in the memory 302 and executed by the processor 301 to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program 303 in the electronic device 3.

[0099] The electronic device 3 can be a desktop computer, a notebook, a palm computer, a cloud server and other electronic devices. The electronic device 3 can include but is not limited to the processor 301 and the memory 302. Those skilled in the art can understand that Figure 3 is only an example of the electronic device 3, and does not constitute a limitation to the electronic device 3. It can include more or fewer components than shown in the figure, or combine some components, or different components. For example, the electronic device can also include input / output devices, network access devices, buses, etc.

[0100] The processor 301 may be a Central Processing Unit (CPU), or other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0101] The memory 302 may be an internal storage unit of the electronic device 3, for example, the hard disk or memory of the electronic device 3. The memory 302 may also be an external storage device of the electronic device 3, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. equipped on the electronic device 3. Further, the memory 302 may also include both the internal storage unit and the external storage device of the electronic device 3. The memory 302 is used to store computer programs and other programs and data required by the electronic device. The memory 302 may also be used to temporarily store data that has been output or is to be output.

[0102] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiments may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above integrated units may be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0103] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0104] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0105] In the embodiments provided in this application, it should be understood that the disclosed device / computer equipment and method can be implemented in other ways. For example, the device / computer equipment embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. Multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0106] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0107] In addition, the functional units in each embodiment of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0108] When the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-mentioned embodiment methods of this application, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be implemented. The computer program can include computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0109] The above embodiments are only used to illustrate the technical solutions of this application, rather than to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of this application, and should all be included in the protection scope of this application.

Claims

1. A control method for power supply of a range extender, characterized in that, Including: In response to a user's selection operation of the vehicle's driving mode and road mode, determining the current driving mode and current road mode of the vehicle; Based on the default energy consumption corresponding to the current driving mode and the default energy consumption of a preset reference driving mode, determining the energy consumption ratio corresponding to the current driving mode; Based on the default battery SOC value corresponding to a preset reference road mode, determining the battery SOC coefficient corresponding to the current road mode; Based on the energy consumption ratio and the battery SOC coefficient, adjusting the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender; Determining the current power preservation mode of the vehicle, and based on the power supply control method of the range extender corresponding to the power preservation mode, as well as the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold, controlling the start or stop of the power supply of the range extender; Among them, the determining the battery SOC coefficient corresponding to the current road mode based on the default battery SOC value corresponding to a preset reference road mode includes: Obtaining the default battery SOC value corresponding to the preset reference road mode, determining the multiple relationship between the default battery SOC value of the current road mode and the default battery SOC value of the reference road mode, and determining the battery SOC coefficient based on the multiple relationship, where the reference road mode is the urban mode; The method further includes: collecting the external environmental temperature of the vehicle by using an environmental temperature sensor, and determining the temperature energy consumption influence coefficient corresponding to the current external environmental temperature of the vehicle according to the mapping relationship between the preset external environmental temperature and the temperature energy consumption influence coefficient; The method further includes: identifying the number of vehicle occupants by using a vehicle seat sensor, and determining the occupant number energy consumption influence coefficient corresponding to the current number of vehicle occupants of the vehicle according to the mapping relationship between the preset number of vehicle occupants and the occupant number energy consumption influence coefficient; The adjusting the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender includes: Multiplying the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption influence coefficient, the occupant number energy consumption influence coefficient, and the basic battery SOC threshold range to obtain the adjusted basic battery SOC threshold range; Multiplying the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption influence coefficient, the occupant number energy consumption influence coefficient, and the basic battery SOC recommended threshold to obtain the adjusted basic battery SOC recommended threshold.

2. The method according to claim 1, wherein The responding to a user's selection operation of the vehicle's driving mode and road mode and determining the current driving mode and current road mode of the vehicle includes: Responding to a click operation on the screen of the in-vehicle infotainment system installed in the vehicle cockpit by the user, and determining the current driving mode and current road mode selected by the user; Among them, the driving modes of the vehicle include an energy-saving mode, a comfort mode, and a sport mode, and the road modes include an urban mode, a highway mode, and a mountain mode.

3. The method according to claim 1, wherein Determining the energy consumption ratio corresponding to the current driving mode based on the default energy consumption corresponding to the current driving mode and the default energy consumption of a preset reference driving mode includes: Pre-obtaining the default energy consumption of the vehicle corresponding to different driving modes under working condition test conditions, calculating the ratio between the default energy consumption of the current driving mode and the default energy consumption of the reference driving mode to obtain the energy consumption ratio, where the reference driving mode is an energy-saving mode.

4. The method according to claim 1, wherein Based on the range extender power supply control method corresponding to the power preservation mode, and the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold, controlling the range extender to start power supply or stop power supply includes: When the vehicle enters the forced power preservation mode, the range extender power supply control method includes that when the actual battery SOC value of the vehicle is less than or equal to the adjusted basic battery SOC recommended threshold, controlling the range extender to start, and using the range extender to supply power to the motor and battery of the vehicle; When the actual battery SOC value is greater than the adjusted basic battery SOC recommended threshold and exceeds the upward adjustment range corresponding to the adjusted basic battery SOC recommended threshold, controlling the range extender to stop power supply.

5. The method according to claim 1, characterized in that, Based on the range extender power supply control method corresponding to the power preservation mode, and the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold, controlling the range extender to start power supply or stop power supply includes: When the vehicle enters the intelligent power preservation mode, the range extender power supply control method includes that when the actual battery SOC value of the vehicle is less than or equal to the adjusted basic battery SOC recommended threshold, controlling the range extender to start, and using the range extender to supply power to the motor and battery of the vehicle; Dynamically adjusting the power generation power of the range extender according to the actual driving state of the vehicle, so as to control the actual battery SOC value to change within a preset range along the adjusted basic battery SOC recommended threshold; When the actual battery SOC value is greater than the adjusted basic battery SOC recommended threshold and exceeds the upward adjustment range corresponding to the adjusted basic battery SOC recommended threshold, controlling the range extender to stop power supply.

6. A range extender power supply control device, characterized in that Including: A mode determination module configured to determine the current driving mode and the current road mode of the vehicle in response to a user's selection operation of the driving mode and the road mode of the vehicle; An energy consumption ratio determination module configured to determine the energy consumption ratio corresponding to the current driving mode based on the default energy consumption corresponding to the current driving mode and the default energy consumption of a preset reference driving mode; A battery SOC coefficient determination module configured to determine the battery SOC coefficient corresponding to the current road mode based on the default battery SOC value corresponding to a preset reference road mode; An adjustment module configured to adjust the basic battery SOC threshold range and the basic battery SOC recommended threshold for controlling the start of the range extender according to the energy consumption ratio and the battery SOC coefficient. The control module is configured to determine the power retention mode in which the vehicle is currently located, and based on the range extender power supply control method corresponding to the power retention mode, as well as the adjusted basic battery SOC threshold range and the basic battery SOC recommended threshold, control the range extender to start power supply or stop power supply; Among them, the battery SOC coefficient determination module is used to obtain the default battery SOC value corresponding to the preset reference road mode, determine the multiple relationship between the default battery SOC value of the current road mode and the default battery SOC value of the reference road mode, and determine the battery SOC coefficient according to the multiple relationship, where the reference road mode is the urban mode; It further includes a temperature energy consumption influence coefficient determination module, which is used to collect the external environmental temperature of the vehicle by using an environmental temperature sensor, and determine the temperature energy consumption influence coefficient corresponding to the current external environmental temperature of the vehicle according to the mapping relationship between the preset external environmental temperature and the temperature energy consumption influence coefficient; It further includes an occupant number energy consumption influence coefficient determination module, which is used to identify the number of vehicle occupants by using a vehicle seat sensor, and determine the occupant number energy consumption influence coefficient corresponding to the current number of vehicle occupants of the vehicle according to the mapping relationship between the preset number of vehicle occupants and the occupant number energy consumption influence coefficient; The adjustment module is used to multiply the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption influence coefficient, the occupant number energy consumption influence coefficient, and the basic battery SOC threshold range to obtain the adjusted basic battery SOC threshold range; multiply the energy consumption ratio, the battery SOC coefficient, the temperature energy consumption influence coefficient, the occupant number energy consumption influence coefficient, and the basic battery SOC recommended threshold to obtain the adjusted basic battery SOC recommended threshold.

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