Range extender control method, device, equipment, vehicle and storage medium

Abstract

The application discloses a range extender control method, device, equipment, vehicle and storage medium, and belongs to the technical field of vehicle control. The method comprises the following steps: acquiring road condition information on a vehicle driving route; generating a range extender control strategy according to the road condition information; correcting a SOC threshold value of the range extender according to the range extender control strategy; and controlling the range extender to work based on the corrected SOC threshold value. In the application, the range extender works at an optimal power before the vehicle enters a low-speed driving mode, charges a power battery, and keeps the SOC value of the power battery in a high range. When the vehicle enters the low-speed driving mode, the working time of the range extender at low power is reduced, the range extender does not need to generate power at medium and high powers, fuel economy and driving comfort are improved.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, and in particular to a range extender control method, device, equipment, vehicle, and storage medium. Background Technology

[0002] Range-extended electric vehicles (REEVs) charge their batteries when the battery charge is low, thereby increasing the vehicle's range. Current REEV control strategies determine the REEV's operating state based on vehicle speed, battery SOC (State of Charge), and power demand. When the battery SOC is low, and the vehicle needs to operate in low-speed mode for extended periods, the power-following strategy results in prolonged low-power generation by the REEV, leading to poor engine fuel economy. Increasing the REEV's power output to medium-high power, however, results in a high engine load due to low vehicle speed, significant noise, and poor overall NVH (Noise, Vibration, and Harshness), reducing driving comfort. Summary of the Invention

[0003] The main objective of this application is to provide a range extender control method, device, equipment, vehicle, and storage medium, which aims to solve the technical problem that fuel economy and driving comfort cannot be balanced when a vehicle is driven in low-speed mode for a long time.

[0004] To achieve the above objectives, this application provides a range extender control method, comprising the following steps:

[0005] Obtain road condition information along the vehicle's route;

[0006] Based on the road condition information, a range extender control strategy is generated;

[0007] According to the range extender control strategy, the SOC threshold of the range extender is corrected accordingly, and the range extender is controlled to operate based on the corrected SOC threshold.

[0008] Optionally, the road condition information includes the mileage of the road segment corresponding to the first type of road surface and the distance between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface, wherein the first type of road surface includes at least one of steep slope road surface, congested road surface, icy and snowy road surface and bumpy road surface.

[0009] The step of generating a range extender control strategy based on the road condition information includes:

[0010] Based on the mileage of the road segment corresponding to the first type of road surface, the first SOC threshold is corrected to obtain the corrected SOC threshold.

[0011] Based on the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface, the start point and end point of the corrected SOC threshold are determined on the vehicle's driving route.

[0012] A range extender control strategy is generated based on the modified SOC threshold, the starting point of the modified SOC threshold, and the ending point of the modified SOC threshold.

[0013] Optionally, the step of correcting the first SOC threshold based on the mileage of the road segment corresponding to the first type of road surface to obtain the corrected SOC threshold includes:

[0014] The correction factor is determined based on the mileage of the road segment corresponding to the first type of road surface;

[0015] The first SOC threshold is corrected according to the correction factor to obtain the corrected SOC threshold.

[0016] Optionally, the step of correcting the first SOC threshold based on the mileage of the road segment corresponding to the first type of road surface to obtain the corrected SOC threshold further includes:

[0017] If the modified SOC threshold is greater than the preset modified SOC threshold, then the modified SOC threshold is modified a second time to the preset modified SOC threshold.

[0018] Optionally, the step of generating a range extender control strategy based on the modified SOC threshold, the start point of the modified SOC threshold, and the end point of the modified SOC threshold includes:

[0019] When the vehicle reaches the starting point of the corrected SOC threshold, the starting threshold of the range extender is changed from the first SOC threshold to the corrected SOC threshold.

[0020] When the vehicle reaches the end point of the modified SOC threshold, the start threshold for controlling the range extender is changed from the modified SOC threshold to the first SOC threshold.

[0021] Optionally, before the step of obtaining road condition information along the vehicle's route, the method further includes:

[0022] Determine whether there is a type 1 road surface on the vehicle's travel route;

[0023] If there is no Type I road surface on the vehicle's driving route, the operating state of the range extender is controlled based on the preset range extender control strategy.

[0024] If there is a Type I road surface on the vehicle's route, then proceed with the step of obtaining road condition information on the vehicle's route.

[0025] In addition, to achieve the above objectives, this application also provides a range extender control device, comprising:

[0026] The information acquisition module is used to acquire road condition information along the vehicle's driving route;

[0027] The control strategy generation module is used to generate a range extender control strategy based on the road condition information.

[0028] The control module is used to correct the SOC threshold of the range extender according to the range extender control strategy, and control the range extender to operate based on the corrected SOC threshold.

[0029] In addition, to achieve the above objectives, this application also provides a range extender control device, including: a memory, a processor, and a range extender control program stored in the memory and executable on the processor, the range extender control program being configured to implement the steps of the range extender control method as described above.

[0030] In addition, to achieve the above objectives, this application also provides a storage medium storing a range extender control program, which, when executed by a processor, implements the steps of the range extender control method as described above.

[0031] Furthermore, to achieve the above objectives, this application also provides a vehicle including a range extender and a range extender control device as described above:

[0032] The range extender is used to start or not start under the control of the range extender control device.

[0033] This application discloses a range extender control method, apparatus, device, vehicle, and storage medium. Compared with existing technologies where fuel economy and driving comfort cannot be balanced when a vehicle is driving in low-speed mode for extended periods, this application obtains road condition information along the vehicle's route; generates a range extender control strategy based on the road condition information; adjusts the range extender's SOC threshold according to the control strategy; and controls the range extender to operate based on the adjusted SOC threshold. In other words, in this application, before the vehicle enters low-speed mode, the range extender operates at its optimal power to charge the battery, keeping the battery's SOC value within a high range. When the vehicle enters low-speed mode, the range extender's low-power power generation time is reduced, and the range extender does not need to generate power at medium or high power, thus improving both fuel economy and driving comfort. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the range extender control device in the hardware operating environment involved in the embodiments of this application;

[0037] Figure 2 This is a flowchart illustrating the first embodiment of the range extender control method of this application;

[0038] Figure 3 This is a schematic diagram of the functional modules of the first embodiment of the range extender control device of this application.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0041] Reference Figure 1 , Figure 1 This is a schematic diagram of the range extender control device structure in the hardware operating environment involved in the embodiments of this application.

[0042] like Figure 1 As shown, the range extender control device may 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 enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0043] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the range extender control device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0044] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and a range extender control program.

[0045] exist Figure 1 In the range extender 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 control device of this application can be set in the range extender control device, and the range extender control device calls the range extender control program stored in the memory 1005 through the processor 1001 and executes the range extender control method provided in the embodiment of this application.

[0046] This application provides a range extender control method, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the range extender control method of this application.

[0047] In this embodiment, the range extender control method includes:

[0048] Step S10: Obtain road condition information along the vehicle's route;

[0049] Step S20: Generate a range extender control strategy based on the road condition information;

[0050] Step S30: According to the range extender control strategy, the SOC threshold of the range extender is corrected accordingly, and the range extender is controlled to operate based on the corrected SOC threshold.

[0051] Compared to existing technologies where fuel economy and driving comfort cannot be balanced when a vehicle is driving in low-speed mode for extended periods, this embodiment generates a range extender control strategy based on road condition information, adjusts the range extender's SOC threshold accordingly, and controls the range extender to operate based on the adjusted SOC threshold. This ensures that the range extender operates at optimal power to charge the battery before the vehicle enters low-speed driving mode, maintaining the battery's SOC value within a high range. When the vehicle enters low-speed driving mode, this reduces the range extender's low-power power generation time and eliminates the need for medium-to-high power generation, thereby improving both fuel economy and driving comfort.

[0052] The specific steps are as follows:

[0053] Step S10: Obtain road condition information along the vehicle's route.

[0054] It should be noted that, in this embodiment, the road condition information includes the mileage of the road segment corresponding to the first type of road surface and the distance between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface. The first type of road surface includes at least one of steep slope road surface, congested road surface, icy and snowy road surface and bumpy road surface.

[0055] It should be noted that traffic information along the vehicle's route can be obtained directly from navigation websites such as Gaode Maps and Baidu Maps.

[0056] Furthermore, before obtaining road condition information along the vehicle's route, the following steps are also included:

[0057] Determine whether there is a type 1 road surface on the vehicle's travel route;

[0058] If there is no Type I road surface on the vehicle's driving route, the operating state of the range extender is controlled based on the preset range extender control strategy.

[0059] If there is a Type I road surface on the vehicle's route, then proceed with the step of obtaining road condition information on the vehicle's route.

[0060] Step S20: Generate a range extender control strategy based on the road condition information.

[0061] The step of generating a range extender control strategy based on the road condition information specifically includes:

[0062] Step S21: Based on the mileage of the road segment corresponding to the first type of road surface, the first SOC threshold is corrected to obtain the corrected SOC threshold.

[0063] Specifically, based on the mileage of the road segment corresponding to the first type of road surface, the first SOC threshold is corrected to obtain the corrected SOC threshold, including:

[0064] Step S211: Determine the correction factor based on the mileage of the road segment corresponding to the first type of road surface.

[0065] In this embodiment, the correction factor is determined based on the preset mapping relationship between the mileage range of the road segment corresponding to the first type of road surface and the correction factor.

[0066] For example, when the mileage range of the road segment corresponding to the first type of road surface is (0,1], the correction factor for its mapping is 0.2; when the mileage range of the road segment corresponding to the first type of road surface is (1,5], the correction factor for its mapping is 0.4; when the mileage range of the road segment corresponding to the first type of road surface is (5,15], the correction factor for its mapping is 0.6; and when the mileage range of the road segment corresponding to the first type of road surface is (15,+∞), the correction factor for its mapping is 0.8. In other words, when the mileage of the road segment corresponding to the first type of road surface is in the range (0,1], the determined correction factor is 0.2; when the mileage range of the road segment corresponding to the first type of road surface is in the range (1,5], the determined correction factor is 0.4; when the mileage range of the road segment corresponding to the first type of road surface is in the range (5,15], the determined correction factor is 0.6; and when the mileage range of the road segment corresponding to the first type of road surface is (15,+∞), the correction factor for its mapping is 0.8.

[0067] It should be noted that the preset mapping relationship between the mileage range of the road segment corresponding to the first type of road surface illustrated above and the correction factor is only one of the preset mapping relationships. Other preset mapping relationships can be set according to actual application needs, which will not be elaborated here.

[0068] Step S212: Correct the first SOC threshold according to the correction factor to obtain the corrected SOC threshold.

[0069] In this embodiment, the first SOC threshold is corrected according to the correction factor to obtain the corrected SOC threshold, which can be characterized by the following formula:

[0070] Corrected SOC threshold = first SOC threshold × (1 + f),

[0071] Where f represents the correction factor.

[0072] It should be noted that the first SOC threshold is the starting threshold corresponding to the range extender's activation. That is, the range extender activates when the SOC value of the power battery equals the first SOC threshold. In this embodiment, if the starting threshold corresponding to the range extender's activation is changed from the first SOC threshold to a modified SOC threshold, then when the power battery's SOC value equals the modified SOC threshold, the range extender's operating state can switch between a stopped state and a started state, or between a low-power operating state and a high-power operating state. Since the modified SOC threshold obtained after correcting the first SOC threshold is greater than the first SOC threshold, the power battery's SOC value remains consistently within a higher range when the starting threshold is the modified SOC threshold, compared to the power battery's SOC value when the starting threshold is the first SOC threshold.

[0073] Furthermore, based on the mileage of the road segment corresponding to the first type of road surface, the first SOC threshold is corrected to obtain the corrected SOC threshold, which also includes:

[0074] Step S213: Compare the modified SOC threshold with the preset modified SOC threshold;

[0075] Step S214: If the modified SOC threshold is greater than the preset modified SOC threshold, then the modified SOC threshold is modified a second time to the preset modified SOC threshold;

[0076] Step S215: If the modified SOC threshold is less than or equal to the preset modified SOC threshold, then the modified SOC threshold is not modified a second time.

[0077] In other words, in this embodiment, the corrected SOC threshold is always less than or equal to the preset corrected SOC threshold. This is to prevent the corrected SOC threshold from being too high, which could lead to frequent start-stop cycles of the range extender and affect its lifespan. Preferably, the preset corrected SOC threshold is 80% of the power battery capacity.

[0078] Step S22: Based on the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface, determine the start point and end point of the corrected SOC threshold on the vehicle's driving route.

[0079] Specifically, based on the distance between the vehicle's current position and the starting point of the road segment corresponding to the first type of road surface, the start and end points of the corrected SOC threshold are determined on the vehicle's travel route, including:

[0080] Step S221: Determine whether the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface is less than or equal to a first preset distance value;

[0081] Step S222: If the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface is less than or equal to the first preset distance value, then the current position of the vehicle on the vehicle's driving route is the starting point of the corrected SOC threshold.

[0082] Step S223: If the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface is greater than a first preset distance value, then determine the starting point of the corrected SOC threshold on the vehicle's driving route, wherein the distance between the starting point of the corrected SOC threshold and the starting point of the road segment corresponding to the first type of road surface is equal to the first preset distance value, and the starting point of the corrected SOC threshold is located between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface.

[0083] Step S224: Based on the current vehicle location, the starting point of the corrected SOC threshold, the corrected SOC threshold, the first SOC threshold, and the current SOC value of the power battery, determine the vehicle location when the SOC value of the power battery reaches the preset threshold;

[0084] Step S225: Determine whether the vehicle's location is between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches its full value.

[0085] Step S226: If the SOC value of the power battery reaches a preset threshold and the vehicle's location is not between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface, then on the vehicle's driving route, determine the end point of the corrected SOC threshold, wherein the distance between the end point of the corrected SOC threshold and the starting point of the road segment corresponding to the first type of road surface is equal to the second preset distance value, and the end point of the corrected SOC threshold is located between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface.

[0086] Step S227: If the vehicle's current location is between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches the preset threshold, then determine whether the distance between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches the preset threshold is greater than a second preset distance value.

[0087] Step S228: If the distance between the vehicle's location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches the preset threshold is greater than the second preset distance value, then the vehicle's location when the SOC value of the power battery reaches the preset threshold is the starting point for correcting the SOC threshold on the vehicle's driving route.

[0088] Step S229: If the distance between the vehicle's location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches a preset threshold is less than or equal to a second preset distance value, then on the vehicle's driving route, determine the end point of the corrected SOC threshold, wherein the distance between the end point of the corrected SOC threshold and the starting point of the road segment corresponding to the first type of road surface is equal to the second preset distance value.

[0089] In this embodiment, the starting point for correcting the SOC threshold is located between the vehicle's current position and the starting point of the road segment corresponding to the first type of road surface, and the distance between the starting point for correcting the SOC threshold and the starting point of the road segment corresponding to the first type of road surface is less than or equal to a first preset distance value. It should be noted that controlling the distance between the starting point for correcting the SOC threshold and the starting point of the road segment corresponding to the first type of road surface to be less than or equal to the first preset distance value prevents the corrected SOC threshold from being used as the starting threshold for the range extender too early, which would increase the number of start-stop cycles of the range extender and affect its service life.

[0090] In this embodiment, the end point of the corrected SOC threshold is located between the vehicle's current position and the starting point of the road segment corresponding to the first type of road surface, and the distance between the end point of the corrected SOC threshold and the starting point of the road segment corresponding to the first type of road surface is less than or equal to a second preset distance value. It should be noted that setting the end point of the corrected SOC threshold between the vehicle's current position and the starting point of the road segment corresponding to the first type of road surface means that the range extender's start threshold is restored to the first SOC threshold as soon as the vehicle enters the road segment of the first type of road surface. Since a higher start threshold for the range extender results in more start-stop cycles, restoring the range extender's start threshold to the first SOC threshold as soon as the vehicle enters the road segment of the first type of road surface reduces the number of start-stop cycles of the range extender when the vehicle is traveling on the road segment of the first type of road surface, reduces the low-power power generation time of the range extender, and improves the generator's fuel economy.

[0091] The step of determining the vehicle's location when the SOC value of the power battery reaches a preset threshold, based on the vehicle's current location, the starting point of the corrected SOC threshold, the corrected SOC threshold, the first SOC threshold, and the current SOC value of the power battery, includes:

[0092] Step A1: Based on the vehicle's current position, the first SOC threshold, the starting point of the corrected SOC threshold, and the current SOC value of the power battery, determine the first power battery SOC value, wherein the first power battery SOC value is the SOC value of the power battery when the vehicle reaches the starting point of the corrected SOC threshold, and the current power battery SOC value is the SOC value of the power battery when the vehicle is at its current position.

[0093] Specifically, based on the vehicle's current location, the first SOC threshold, the starting point of the corrected SOC threshold, and the current SOC value of the power battery, the first power battery SOC value is determined, including:

[0094] The distance between the current position of the vehicle and the starting point of the corrected SOC threshold is determined and denoted as the first distance;

[0095] The first distance, the first SOC threshold, and the current SOC value of the power battery are input into the SOC value prediction model to calculate the first SOC value of the power battery.

[0096] The training methods for the SOC value prediction model include:

[0097] A sample dataset is established, which includes multiple sets of data. Each set of data includes a first distance, a first SOC threshold, a current power battery SOC value, and a first power battery SOC value. Each set of data is provided by a vehicle traveling on a road surface other than the first type.

[0098] The sample dataset is divided into a training dataset and a validation dataset;

[0099] The preset base model is trained using the training dataset to obtain a preliminary SOC value prediction model;

[0100] The SOC value prediction model was validated using the validation dataset, and the validation results were obtained.

[0101] Determine whether the verification results meet the preset conditions;

[0102] If the conditions are not met, the parameters of the preset basic model are adjusted based on the verification results, and the process of dividing the sample dataset to obtain the training dataset and the verification dataset is repeated until the verification results meet the preset conditions. The preliminary SOC value prediction model is then used as the SOC value prediction model.

[0103] Specifically, determining whether the verification result meets the preset conditions can be achieved through the following methods:

[0104] The first distance, first SOC threshold, and current SOC value of the power battery in each data set of the validation dataset are input into the preliminary SOC value prediction model. After calculation, the preliminary SOC value prediction model outputs a SOC validation value. This SOC validation value is then compared with the first SOC value of the power battery in its corresponding data set to obtain the difference comparison result. This process is repeated for each data set in the validation dataset. Data sets with difference comparison results greater than a preset difference value are selected, and the number of these data sets is counted. The ratio of the number of these counted data sets to the total number of data sets in the validation dataset is calculated. If this ratio is greater than or equal to a preset percentage, the preliminary SOC value prediction model fails validation; otherwise, it passes validation, and this preliminary SOC value prediction model is adopted as the final SOC value prediction model.

[0105] It should be noted that, in this embodiment, the preset base model can be a convolutional neural network model.

[0106] Step A2: Based on the first power battery SOC value, the starting point of the modified SOC threshold, and the modified SOC threshold, determine the vehicle's location when the power battery SOC value reaches the preset threshold.

[0107] Specifically, based on the first power battery SOC value, the starting point of the corrected SOC threshold, and the corrected SOC threshold, determining the vehicle's location when the power battery's SOC value reaches a preset threshold includes:

[0108] The first power battery SOC value, the corrected SOC threshold, and the preset threshold are input into the distance prediction model to calculate the second distance. The second distance is used to characterize the distance the vehicle travels when the power battery SOC value reaches the preset threshold.

[0109] Based on the second distance and the starting point of the modified SOC threshold, the location of the vehicle when the SOC value of the power battery reaches the preset threshold is determined.

[0110] The training methods for the distance prediction model include:

[0111] A sample dataset is established, which includes multiple sets of data. Each set of data includes a first power battery SOC value, a corrected SOC threshold, a preset threshold, and a second distance. Each set of data is provided by vehicles traveling on roads other than the first type of road.

[0112] The sample dataset is divided into a training dataset and a validation dataset;

[0113] The preset base model is trained using the training dataset to obtain a preliminary distance prediction model;

[0114] The preliminary distance prediction model was validated using the validation dataset to obtain validation results;

[0115] Determine whether the verification results meet the preset conditions;

[0116] If the conditions are not met, the parameters of the preset basic model are adjusted based on the verification results, and the process of dividing the sample dataset to obtain the training dataset and the verification dataset is repeated until the verification results meet the preset conditions, at which point the preliminary distance prediction model is used as the distance prediction model.

[0117] Specifically, determining whether the verification result meets the preset conditions can be achieved through the following methods:

[0118] The first SOC value of the power battery, the corrected SOC threshold, and the preset threshold from each data set in the validation dataset are input into the preliminary distance prediction model. After calculation, the preliminary distance prediction model outputs a distance validation value. This distance validation value is then compared with the second distance in its corresponding data set to obtain the difference comparison result. This process is repeated for each data set in the validation dataset. Data sets whose difference comparison results are greater than a preset difference value are selected, and the number of these data sets is counted. The ratio of the number of these counted data sets to the total number of data sets in the validation dataset is calculated. If this ratio is greater than or equal to a preset percentage, the preliminary distance prediction model fails validation; otherwise, it passes validation, and this preliminary distance prediction model is adopted as the final distance prediction model.

[0119] It should be noted that, in this embodiment, the preset base model can be a convolutional neural network model.

[0120] Step S23: Generate a range extender control strategy based on the modified SOC threshold, the start point of the modified SOC threshold, and the end point of the modified SOC threshold.

[0121] Specifically, based on the modified SOC threshold, the start point of the modified SOC threshold, and the end point of the modified SOC threshold, a range extender control strategy is generated, including:

[0122] Step S231: When the vehicle reaches the starting point of the corrected SOC threshold, the starting threshold of the range extender is changed from the first SOC threshold to the corrected SOC threshold.

[0123] Step S232: When the vehicle reaches the end point of the corrected SOC threshold, the start threshold of the range extender is changed from the corrected SOC threshold to the first SOC threshold.

[0124] In this embodiment, before the vehicle enters the first type of road surface, the control threshold for the range extender needs to be changed from the first SOC threshold to a modified SOC threshold, and then back to the first SOC threshold. This ensures that when the vehicle enters the first type of road surface, the SOC value of the vehicle's power battery is in a higher range, extending the vehicle's driving distance when the power battery's SOC value decreases to the first SOC threshold. This reduces the low-power generation time of the range extender and improves engine fuel economy. Simultaneously, when the power battery's SOC value decreases to the first SOC threshold, low-power generation by the range extender is sufficient to ensure the vehicle completes the journey on the first type of road surface, eliminating the need for medium- or high-power generation and improving driving comfort.

[0125] Step S30: According to the range extender control strategy, the SOC threshold of the range extender is corrected accordingly, and the range extender is controlled to operate based on the corrected SOC threshold.

[0126] Specifically, according to the range extender control strategy, the SOC threshold of the range extender is adjusted accordingly, and the range extender is controlled to operate based on the adjusted SOC threshold, including:

[0127] When the vehicle reaches the starting point of the corrected SOC threshold, the starting threshold of the range extender is changed from the first SOC threshold to the corrected SOC threshold, and the range extender is controlled to operate based on the corrected SOC threshold.

[0128] When the vehicle reaches the end point of the corrected SOC threshold, the start threshold of the range extender is changed from the corrected SOC threshold to the first SOC threshold, and the range extender is controlled to operate based on the first SOC threshold.

[0129] This application also provides a range extender control device, see reference. Figure 3 , Figure 3 This is a schematic diagram of the functional modules of the first embodiment of the range extender control device of this application.

[0130] In this embodiment, the range extender control device includes:

[0131] Information acquisition module 10 is used to acquire road condition information along the vehicle's driving route;

[0132] The control strategy generation module 20 is used to generate a range extender control strategy based on the road condition information.

[0133] The control module 30 is used to correct the SOC threshold of the range extender according to the range extender control strategy, and control the range extender to operate based on the corrected SOC threshold.

[0134] Optionally, the road condition information includes the mileage of the road segment corresponding to the first type of road surface and the distance between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface, wherein the first type of road surface includes at least one of steep slope road surface, congested road surface, icy and snowy road surface and bumpy road surface.

[0135] The control strategy generation module includes:

[0136] The correction unit is used to correct the first SOC threshold based on the mileage of the road segment corresponding to the first type of road surface, so as to obtain the corrected SOC threshold.

[0137] The correction application determination unit is used to determine the start point and end point of the corrected SOC threshold on the vehicle's driving route based on the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface.

[0138] The control strategy generation unit is used to generate a range extender control strategy based on the modified SOC threshold, the start point of the modified SOC threshold, and the end point of the modified SOC threshold.

[0139] Optionally, the correction unit includes:

[0140] The correction factor acquisition subunit is used to determine the correction factor based on the mileage of the road segment corresponding to the first type of road surface.

[0141] The SOC threshold correction subunit is used to correct the first SOC threshold according to the correction factor to obtain the corrected SOC threshold.

[0142] Optionally, the correction unit further includes:

[0143] The secondary correction subunit is used to correct the SOC threshold to the preset SOC threshold if the corrected SOC threshold is greater than the preset corrected SOC threshold.

[0144] Optionally, the control strategy generation unit is used to implement:

[0145] When the vehicle reaches the starting point of the corrected SOC threshold, the starting threshold of the range extender is changed from the first SOC threshold to the corrected SOC threshold.

[0146] When the vehicle reaches the end point of the modified SOC threshold, the start threshold for controlling the range extender is changed from the modified SOC threshold to the first SOC threshold.

[0147] Optionally, the range extender control device further includes a judgment and selection module, which is used to implement:

[0148] Determine whether there is a type 1 road surface on the vehicle's travel route;

[0149] If there is no Type I road surface on the vehicle's driving route, the operating state of the range extender is controlled based on the preset range extender control strategy.

[0150] If there is a Type I road surface on the vehicle's route, then proceed with the step of obtaining road condition information on the vehicle's route.

[0151] Optionally, the correction application determination unit includes:

[0152] The first judgment subunit is used to determine whether the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface is less than or equal to a first preset distance value.

[0153] The starting point determination subunit is used to implement:

[0154] If the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface is less than or equal to the first preset distance value, then the current position of the vehicle on the vehicle's driving route is the starting point of the corrected SOC threshold.

[0155] If the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface is greater than a first preset distance value, then the starting point of the corrected SOC threshold is determined on the vehicle's driving route, wherein the distance between the starting point of the corrected SOC threshold and the starting point of the road segment corresponding to the first type of road surface is equal to the first preset distance value, and the starting point of the corrected SOC threshold is located between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface.

[0156] The vehicle location estimation subunit is used to determine the vehicle's location when the SOC value of the power battery reaches a preset threshold, based on the vehicle's current location, the starting point of the corrected SOC threshold, the corrected SOC threshold, the first SOC threshold, and the current SOC value of the power battery.

[0157] The second judgment subunit is used to determine whether the vehicle's location is between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches the full value.

[0158] The end point determines the sub-unit, used to implement:

[0159] If the SOC value of the power battery reaches a preset threshold and the vehicle's location is not between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface, then the end point of the corrected SOC threshold is determined on the vehicle's driving route. The distance between the end point of the corrected SOC threshold and the starting point of the road segment corresponding to the first type of road surface is equal to the second preset distance value, and the end point of the corrected SOC threshold is located between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface.

[0160] If the vehicle's current location is between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches the preset threshold, then it is determined whether the distance between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches the preset threshold is greater than a second preset distance value.

[0161] If the distance between the vehicle's location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches the preset threshold is greater than the second preset distance value, then the vehicle's location when the SOC value of the power battery reaches the preset threshold is the starting point for correcting the SOC threshold on the vehicle's driving route.

[0162] If the distance between the vehicle's location and the starting point of the road segment corresponding to the first type of road surface when the SOC value of the power battery reaches a preset threshold is less than or equal to a second preset distance value, then the end point of the corrected SOC threshold is determined on the vehicle's driving route, wherein the distance between the end point of the corrected SOC threshold and the starting point of the road segment corresponding to the first type of road surface is equal to the second preset distance value.

[0163] The specific implementation of the range extender control device in this application is basically the same as the various embodiments of the range extender control method described above, and will not be repeated here.

[0164] This application also provides a vehicle, which includes a range extender and a range extender control device as described above:

[0165] The range extender is used to start or not start under the control of the range extender control device.

[0166] The specific implementation of the range extender control device in this application is basically the same as the various embodiments of the range extender control method described above, and will not be repeated here.

[0167] This application embodiment also provides a storage medium storing a range extender control program, which, when executed by a processor, implements the steps of the range extender control method described above.

[0168] The specific implementation of the storage medium in this application is basically the same as the embodiments of the range extender control method described above, and will not be repeated here.

[0169] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0170] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0171] 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.

[0172] 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 range extender control method, characterized in that, The range extender control method includes the following steps: Obtain road condition information along the vehicle's route, wherein the road condition information includes the mileage corresponding to a first type of road surface, and the first type of road surface includes at least one of steep slope road surface, congested road surface, icy and snowy road surface, and bumpy road surface; Based on the mileage corresponding to the first type of road surface, a correction factor is determined, wherein the larger the mileage value corresponding to the mileage, the larger the correction factor. Based on the correction factor, the first SOC threshold is corrected to obtain the corrected SOC threshold. The larger the correction factor, the higher the corrected SOC threshold. The first SOC threshold is the start-up threshold corresponding to the start-up of the range extender. The corrected SOC threshold is greater than the first SOC threshold. Based on the modified SOC threshold, a range extender control strategy is generated; According to the range extender control strategy, the SOC threshold of the range extender is corrected accordingly, and the range extender is controlled to operate based on the corrected SOC threshold.

2. The range extender control method as described in claim 1, characterized in that, The road condition information also includes the distance between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface. The step of generating a range extender control strategy based on the corrected SOC threshold includes: Based on the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type of road surface, the start point and end point of the corrected SOC threshold are determined on the vehicle's driving route. A range extender control strategy is generated based on the modified SOC threshold, the starting point of the modified SOC threshold, and the ending point of the modified SOC threshold.

3. The range extender control method as described in claim 1, characterized in that, The road condition information includes the distance between the vehicle's current location and the starting point of the road segment corresponding to the first type of road surface. After the step of correcting the first SOC threshold based on the correction factor to obtain the corrected SOC threshold, the method further includes: If the modified SOC threshold is greater than the preset modified SOC threshold, then the modified SOC threshold is modified a second time to the preset modified SOC threshold.

4. The range extender control method as described in claim 2, characterized in that, The step of generating a range extender control strategy based on the modified SOC threshold, the start point of the modified SOC threshold, and the end point of the modified SOC threshold includes: When the vehicle reaches the starting point of the corrected SOC threshold, the starting threshold of the range extender is changed from the first SOC threshold to the corrected SOC threshold. When the vehicle reaches the end point of the modified SOC threshold, the start threshold for controlling the range extender is changed from the modified SOC threshold to the first SOC threshold.

5. The range extender control method as described in claim 1, characterized in that, Before the step of obtaining road condition information along the vehicle's route, the method further includes: Determine whether there is a type 1 road surface on the vehicle's travel route; If there is no Type I road surface on the vehicle's driving route, the operating state of the range extender is controlled based on the preset range extender control strategy. If there is a Type I road surface on the vehicle's route, then proceed with the step of obtaining road condition information on the vehicle's route.

6. A range extender control device, characterized in that, The range extender control device includes: The information acquisition module is used to acquire road condition information along the vehicle's driving route. The road condition information includes the mileage corresponding to a first type of road surface, which includes at least one of steep slope road surface, congested road surface, icy and snowy road surface, and bumpy road surface. A control strategy generation module is used to determine a correction factor based on the mileage corresponding to the first type of road surface, wherein the larger the mileage value corresponding to the mileage, the larger the correction factor; based on the correction factor, a first SOC threshold is corrected to obtain a corrected SOC threshold, wherein the larger the correction factor, the higher the corrected SOC threshold, the first SOC threshold is the start-up threshold corresponding to the range extender start-up, and the corrected SOC threshold is greater than the first SOC threshold; and based on the corrected SOC threshold, a range extender control strategy is generated. The control module is used to correct the SOC threshold of the range extender according to the range extender control strategy, and control the range extender to operate based on the corrected SOC threshold.

7. A range extender control device, characterized in that, The device includes: a memory, a processor, and a range extender control program stored in the memory and executable on the processor, the range extender control program being configured to implement the steps of the range extender control method as described in any one of claims 1 to 5.

8. A storage medium, characterized in that, The storage medium stores a range extender control program, which, when executed by a processor, implements the steps of the range extender control method as described in any one of claims 1 to 5.

9. A vehicle, characterized in that, The vehicle includes a range extender and the range extender control device as described in claim 6: The range extender is used to start or not start under the control of the range extender control device.

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