CN114889451A

CN114889451A - Range extender control method, device, equipment, vehicle and storage medium

Info

Publication number: CN114889451A
Application number: CN202210683380.8A
Authority: CN
Inventors: 谢双飞; 马在朋; 余才光; 陈勇; 邝华会; 陈点龙; 梁国才
Original assignee: Zhejiang Geely Holding Group Co Ltd; Ningbo Geely Automobile Research and Development Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Ningbo Geely Automobile Research and Development Co Ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-08-12

Abstract

The application discloses a range extender control method, device and equipment, a vehicle and a storage medium, and belongs to the technical field of vehicle control. The method comprises the steps of obtaining road condition information on a vehicle driving route; and generating a range extender control strategy according to the road condition information, correspondingly correcting the SOC threshold of the range extender according to the range extender control strategy, and controlling the range extender to work based on the corrected SOC threshold. In the application, before the vehicle enters the low-gear running mode, the range extender works at the optimal power to charge the power battery, so that the SOC value of the power battery is kept in a higher range.

Description

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

Technical Field

The present disclosure relates to the field of vehicle control technologies, and in particular, to a method, an apparatus, a device, a vehicle, and a storage medium for controlling a range extender.

Background

When the electric quantity of the power battery of the range extender electric automobile is low, the range extender generates electricity to charge the power battery so as to improve the cruising ability of the electric automobile. The current range extender control strategy determines the working state of the range extender according to the vehicle speed, the SOC value (state of charge) of the power battery and the required power. When the SOC value of the power battery is low, when the vehicle needs to run for a long time in a low-speed gear running mode, the range extender generates electricity at low power for a long time according to a power following strategy, the economy of fuel oil of an engine is poor, if the generated power of the range extender is increased, the range extender generates electricity at high power, at the moment, the driving comfort of the vehicle is reduced due to the fact that the vehicle speed is low, the rotating speed load of the engine is large, the noise is obvious, the NVH (noise, vibration and harshness) of the whole vehicle is poor.

Disclosure of Invention

The application mainly aims to provide a range extender control method, device, equipment, vehicle and storage medium, and aims to solve the technical problem that fuel economy and driving comfort cannot be considered when the vehicle runs in a low-gear running mode for a long time.

In order to achieve the above object, the present application provides a range extender control method, including the steps of:

acquiring road condition information on a vehicle driving route;

generating a range extender control strategy according to the road condition information;

and correspondingly correcting the SOC threshold of the range extender according to the range extender control strategy, and controlling the range extender to work based on the corrected SOC threshold.

Optionally, the road condition information includes a mileage of a road segment corresponding to a first type road surface and a distance between a current position of a vehicle and a starting point of the road segment corresponding to the first type road surface, where the first type road surface includes at least one of a steep slope road surface, a congested road surface, an icy and snowy road surface, and a bumpy road surface;

the step of generating the range extender control strategy according to the road condition information comprises the following steps:

correcting the first SOC threshold value according to the mileage of the road section corresponding to the first type of road surface to obtain a corrected SOC threshold value;

determining a starting point and an ending point of the corrected SOC threshold value on a driving route of the vehicle according to the distance between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface;

and generating a range extender control strategy based on the corrected SOC threshold, the starting point of the corrected SOC threshold and the ending point of the corrected SOC threshold.

Optionally, the step of correcting the first SOC threshold value according to the mileage of the road segment corresponding to the first type of road surface to obtain a corrected SOC threshold value includes:

determining a correction factor according to the mileage of the road section corresponding to the first type of road surface;

and correcting the first SOC threshold value according to the correction factor to obtain the corrected SOC threshold value.

Optionally, the step of correcting the first SOC threshold value according to the mileage of the road segment corresponding to the first type of road surface to obtain a corrected SOC threshold value further includes:

and if the corrected SOC threshold value is larger than a preset corrected SOC threshold value, secondarily correcting the corrected SOC threshold value into the preset corrected SOC threshold value.

Optionally, the step of generating a range extender control strategy based on the corrected SOC threshold, the starting point of the corrected SOC threshold, and the ending point of the corrected SOC threshold includes:

when the vehicle runs to the starting point of the corrected SOC threshold value, controlling the starting threshold value of the range extender to be converted from the first SOC threshold value to the corrected SOC threshold value;

when the vehicle runs to the end point of the corrected SOC threshold value, the starting threshold value of the range extender is controlled to be converted from the corrected SOC threshold value to the first SOC threshold value.

Optionally, before the step of obtaining the road condition information on the driving route of the vehicle, the method further includes:

judging whether a first type of road surface exists on a vehicle driving route;

if the first type of road surface does not exist on the vehicle running route, controlling the working state of the range extender based on a preset range extender control strategy;

and if the first type of road surface exists on the vehicle driving route, executing the step of acquiring the road condition information on the vehicle driving route.

In addition, to achieve the above object, the present application also provides a range extender control device, including:

the information acquisition module is used for acquiring road condition information on a vehicle driving route;

the control strategy generating module is used for generating a range extender control strategy according to the road condition information;

and the control module is used for correspondingly correcting the SOC threshold of the range extender according to the range extender control strategy and controlling the range extender to work based on the corrected SOC threshold.

Further, to achieve the above object, the present application also provides a range extender control apparatus including: the system comprises a memory, a processor and a range extender control program stored on the memory and operable on the processor, wherein the range extender control program is configured to implement the steps of the range extender control method.

In addition, to achieve the above object, the present application further provides a storage medium having a range extender control program stored thereon, which when executed by a processor, implements the steps of the range extender control method as described above.

In addition, to achieve the above object, the present application also provides a vehicle including a range extender and the range extender control device as described above:

and the range extender is used for being started or not started under the control of the range extender control device.

Compared with the prior art that when the vehicle runs in a low-gear running mode for a long time, fuel economy and driving comfort cannot be both considered, the method obtains road condition information on a vehicle running route; and generating a range extender control strategy according to the road condition information, correspondingly correcting the 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. That is to say, in this application, before the vehicle enters the low gear mode of travel, the range extender works at the optimum power, charges the power battery, keeps the SOC value of the power battery in a higher range, when the vehicle enters the low gear mode of travel, reduces the working time of low-power generation of the range extender and the range extender does not need to generate power at medium and high power, and improves fuel economy and driving comfort.

Drawings

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

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a range extender control device in a hardware operating environment according to an embodiment of the present application;

FIG. 2 is a schematic flowchart of a first embodiment of a range extender control method according to the present application;

fig. 3 is a functional block diagram of a first embodiment of a range extender control device according to the present application.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

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

Referring to fig. 1, fig. 1 is a schematic structural diagram of a range extender control device in a hardware operating environment according to an embodiment of the present application.

As shown in fig. 1, 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. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.

Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the range extender control device and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.

As shown in fig. 1, the memory 1005, which is a storage medium, may include therein an operating system, a data storage module, a network communication module, a user interface module, and a range extender control program.

In the range extender control device shown in fig. 1, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the range extender control device may be provided 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 by the embodiment of the present application.

An embodiment of the present application provides a method for controlling a range extender, and referring to fig. 2, fig. 2 is a schematic flowchart of a first embodiment of the method for controlling the range extender.

In this embodiment, the range extender control method includes:

step S10, obtaining road condition information on a vehicle driving route;

step S20, generating a range extender control strategy according to the road condition information;

and step S30, correspondingly correcting the 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.

Compared with the prior art, when the vehicle runs in a low-gear running mode for a long time, the fuel economy and the driving comfort cannot be considered at the same time. In the embodiment, according to road condition information, a range extender control strategy is generated, the SOC threshold of the range extender is correspondingly corrected, and the range extender is controlled to work based on the corrected SOC threshold, so that the range extender works at the optimal power before the vehicle enters a low-speed gear running mode, the power battery is charged, the SOC value of the power battery is kept in a higher range, when the vehicle enters the low-speed gear running mode, the low-power generation working time of the range extender is shortened, the range extender does not need to generate electricity at the medium and high power, and meanwhile, the fuel economy and the driving comfort are improved.

The method comprises the following specific steps:

and step S10, obtaining the road condition information on the driving route of the vehicle.

It should be noted that, in this embodiment, the road condition information includes a mileage of a road segment corresponding to the first type road surface and a distance between the current position of the vehicle and a starting point of the road segment corresponding to the first type road surface, where the first type road surface includes at least one of a steep slope road surface, a congested road surface, an ice and snow road surface, and a bumpy road surface.

It should be noted that the road condition information on the driving route of the vehicle can be directly obtained from navigation websites such as a high-grade map and a Baidu map.

Further, before obtaining the road condition information on the driving route of the vehicle, the method further comprises the following steps:

judging whether a first type of road surface exists on a vehicle driving route;

And step S20, generating a range extender control strategy according to the road condition information.

The step of generating the range extender control strategy according to the road condition information specifically comprises the following steps:

and step S21, correcting the first SOC threshold value according to the mileage of the road section corresponding to the first type of road surface to obtain a corrected SOC threshold value.

Specifically, the step of correcting the first SOC threshold value according to the mileage of the road segment corresponding to the first type of road surface to obtain a corrected SOC threshold value includes:

and S211, determining a correction factor according to the mileage of the road section corresponding to the first type of road surface.

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

For example, when the range of the mileage of the road section corresponding to the first type road surface is (0, 1), the correction factor corresponding to the map is 0.2, when the range of the mileage of the road section corresponding to the first type road surface is (1, 5), the correction factor corresponding to the map is 0.4, when the range of the mileage of the road section corresponding to the first type road surface is (5, 15), the correction factor corresponding to the map is 0.6, when the range of the mileage of the road section corresponding to the first type road surface is (15, + ∞), the correction factor corresponding to the map is 0.8, that is, when the mileage of the road section corresponding to the first type road surface is in the (0, 1), the correction factor corresponding to the mileage of the first type road surface is 0.2, when the mileage of the road section corresponding to the first type road surface is in the (1, 5), the correction factor corresponding to the road section corresponding to the first type road surface is in the (5, 15), the determined correction factor is 0.6; when the mileage range of the road section corresponding to the first type road surface is (15, + ∞), the correction factor corresponding to the mapping is 0.8.

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 and the correction factor described above is only one preset mapping relationship, and other preset mapping relationships may also be set according to actual application requirements, which is not described herein again.

And S212, correcting the first SOC threshold value according to the correction factor to obtain the corrected SOC threshold value.

In this embodiment, the first SOC threshold is modified according to the modification factor to obtain the modified SOC threshold, which can be characterized by the following formula:

the corrected SOC threshold value is the first SOC threshold value x (1+ f),

wherein f represents a correction factor.

The first SOC threshold is a start threshold corresponding to the range extender start. Namely, when the SOC value of the power battery is equal to the first SOC threshold value, the range extender is started. In this embodiment, if the start threshold corresponding to the start of the range extender is converted from the first SOC threshold to the corrected SOC threshold, when the SOC value of the power battery is equal to the corrected SOC threshold, the operating state of the range extender may be switched between the stop state and the start state, or may be switched between the low power operating state and the high power operating state. Since the corrected SOC threshold obtained by correcting the first SOC threshold is larger than the first SOC threshold, the SOC value of the power battery is always kept in a higher range when the start threshold of the power battery is the corrected SOC threshold than when the start threshold of the power battery is the first SOC threshold.

Further, the method for correcting the first SOC threshold value according to the mileage of the road section corresponding to the first type road surface to obtain a corrected SOC threshold value further includes:

step S213, comparing the corrected SOC threshold value with a preset corrected SOC threshold value;

step S214, if the corrected SOC threshold value is larger than the preset corrected SOC threshold value, secondarily correcting the corrected SOC threshold value to the preset corrected SOC threshold value;

step S215, if the corrected SOC threshold is less than or equal to a preset corrected SOC threshold, not performing secondary correction on the corrected SOC threshold.

That is, in the present embodiment, the corrected SOC threshold value is always smaller than or equal to the preset corrected SOC threshold value. The method is used for preventing the frequent starting and stopping of the range extender caused by the overhigh SOC threshold value after correction and influencing the service life of the range finder. Preferably, the preset modified SOC threshold is 80% of the power battery capacity.

And step S22, determining a starting point and an ending point of the corrected SOC threshold value on the driving route of the vehicle according to the distance between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface.

Specifically, determining the starting point and the ending point of the corrected SOC threshold value on the vehicle driving route according to the distance between the current position of the vehicle and the starting point of the road segment corresponding to the first type road surface includes:

step S221, judging whether the distance between the current position of the vehicle and the starting point of the road section corresponding to the first type road surface is smaller than or equal to a first preset distance value or not;

step S222, if the distance between the current position of the vehicle and the starting point of the road section corresponding to the first type road surface is smaller than or equal to a first preset distance value, the current position of the vehicle is a starting point of the corrected SOC threshold value on the running route of the vehicle;

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 road surface is greater than a first preset distance value, determining a starting point of the corrected SOC threshold value on the vehicle driving route, where the distance between the starting point of the corrected SOC threshold value and the starting point of the road segment corresponding to the first type road surface is equal to the first preset distance value, and the starting point of the corrected SOC threshold value is located between the current position of the vehicle and the starting point of the road segment corresponding to the first type road surface;

step S224, determining the position of the vehicle when the SOC value of the power battery reaches a preset threshold value based on the current position of the vehicle, the starting point of the corrected SOC threshold value, the first SOC threshold value and the current SOC value of the power battery;

step S225, judging whether the position of the vehicle is located between the current position of the vehicle and the starting point of the road section corresponding to the first type road surface when the SOC value of the power battery reaches the full value;

step S226, if the position of the vehicle is not located between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface when the SOC value of the power battery reaches a preset threshold value, determining an ending point of the corrected SOC threshold value on the vehicle driving route, wherein the distance between the ending point of the corrected SOC threshold value and the starting point of the road section corresponding to the first type of road surface is equal to the second preset distance value, and the ending point of the corrected SOC threshold value is located between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface;

step S227, if the position of the vehicle is located between the current position of the vehicle and the starting point of the road section corresponding to the first type road surface when the SOC value of the power battery reaches a preset threshold value, judging whether the distance between the position of the vehicle and the starting point of the road section corresponding to the first type road surface is larger than a second preset distance value when the SOC value of the power battery reaches the preset threshold value;

step S228, if the distance between the position of the vehicle and the starting point of the road section corresponding to the first type road surface is larger than a second preset distance value when the SOC value of the power battery reaches a preset threshold value, the position of the vehicle is a starting point for correcting the SOC threshold value when the SOC value of the power battery reaches the preset threshold value on the vehicle running route;

step S229, if the distance between the 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 second preset distance value when the SOC value of the power battery reaches the preset threshold value, determining an ending point of the corrected SOC threshold value on the vehicle driving route, where the distance between the ending point of the corrected SOC threshold value and the starting point of the road segment corresponding to the first type of road surface is equal to the second preset distance value.

In this embodiment, the starting point of the corrected SOC threshold value 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, and the distance between the starting point of the corrected SOC threshold value 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. It should be noted that 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 controlled to be smaller than or equal to a first preset distance value, so that the corrected SOC threshold is prevented from being started too early as the starting threshold of the range extender, which increases the number of times of starting and stopping the range extender and affects the service life of the range extender.

In this embodiment, the ending 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, and the distance between the ending 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, when the ending point of the corrected SOC threshold value is set between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface, that is, when the vehicle enters the road section corresponding to the first type of road surface, the start threshold value of the range extender is restored to the first SOC threshold value. The starting threshold of the range extender is larger, the starting and stopping times of the range extender are more, so that the starting threshold of the range extender is recovered to be the first SOC threshold between the sections of the vehicle entering the first type of road surface, the starting and stopping times of the range extender when the vehicle runs in the sections of the first type of road surface are reduced, the low-power generation time of the range extender is shortened, and the fuel economy of the transmitter is improved.

The method comprises the following steps of determining the position of a vehicle when the SOC value of the power battery reaches a preset threshold value based on the current position of the vehicle, the starting point of the corrected SOC threshold value, the first SOC threshold value and the current SOC value of the power battery, wherein the steps comprise:

step A1, determining a first power battery SOC value based on the current position of the vehicle, the first SOC threshold value, the starting point of the corrected SOC threshold value and the current 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 value, and the current power battery SOC value is the SOC value of the power battery when the vehicle is at the current position.

Specifically, the determining the first power battery SOC value based on the current position of the vehicle, the first SOC threshold value, the starting point of the corrected SOC threshold value and the current power battery SOC value comprises the following steps:

determining the distance between the current position of the vehicle and the starting point of the corrected SOC threshold value, and recording the distance as a first distance;

and inputting the first distance, the first SOC threshold value and the current power battery SOC value into an SOC value prediction model, and calculating to obtain a first power battery SOC value.

The training method of the SOC value prediction model comprises the following steps:

establishing a sample data set, wherein the sample data set comprises a plurality of groups of data, each group of data comprises a first distance, a first SOC threshold value, a current power battery SOC value and a first power battery SOC value, and each group of data is provided by a vehicle running on a non-first type road surface;

dividing the sample data set to obtain a training data set and a verification data set;

training a preset basic model by using the training data set to obtain a preliminary SOC value prediction model;

verifying the SOC value prediction model by using the verification data set to obtain a verification result;

determining whether the verification result meets a preset condition;

if not, performing parameter adjustment on the preset basic model based on the verification result, returning to the step of dividing the sample data set to obtain a training data set and a verification data set until the verification result meets a preset condition, and taking the preliminary SOC value prediction model as an SOC value prediction model.

Specifically, determining whether the verification result satisfies the preset condition may be implemented by:

and inputting the first distance, the first SOC threshold value and the current power battery SOC value in each group of data in the verification data set into a preliminary SOC value prediction model, calculating the preliminary SOC value prediction model, outputting an SOC verification value, and comparing the difference value of the SOC verification value with the SOC value of the first power battery in the corresponding group of data to obtain a difference value comparison result. And traversing each group of data in the verification data set and executing the steps. And screening to obtain data groups with difference comparison results larger than a preset difference preset value, and counting the number of the data groups. And calculating the ratio of the counted group number of the data groups to the group number of the total data groups in the verification data set. Judging whether the ratio is larger than or equal to a preset ratio preset value, if so, indicating that the preliminary SOC value prediction model verification fails; otherwise, if not, the preliminary SOC value prediction model is verified to be passed, and the preliminary SOC value prediction model is used as the SOC value prediction model.

It should be noted that, in this embodiment, the preset base model may be a convolutional neural network model.

And A2, determining the position of the vehicle when the SOC value of the power battery reaches a preset threshold value based on the SOC value of the first power battery, the starting point of the corrected SOC threshold value and the corrected SOC threshold value.

Specifically, determining the position of the vehicle when the SOC value of the power battery reaches a preset threshold value based on the first power battery SOC value, the starting point of the corrected SOC threshold value and the corrected SOC threshold value includes:

inputting the SOC value of the first power battery, the corrected SOC threshold value and the preset threshold value into a distance prediction model, and calculating to obtain a second distance, wherein the second distance is used for representing the distance traveled by a vehicle when the SOC value of the power battery reaches the preset threshold value;

and determining the position of the vehicle when the SOC value of the power battery reaches a preset threshold value according to the second distance and the starting point of the corrected SOC threshold value.

The training method of the distance prediction model comprises the following steps:

establishing a sample data set, wherein the sample data set comprises a plurality of groups of data, each group of data comprises a first power battery SOC value, a corrected SOC threshold value, a preset threshold value and a second distance, and each group of data is provided by a vehicle running on a non-first type road surface;

training a preset basic model by using the training data set to obtain a preliminary distance prediction model;

verifying the preliminary distance prediction model by using the verification data set to obtain a verification result;

determining whether the verification result meets a preset condition;

if the distance prediction model does not meet the preset condition, performing parameter adjustment on the preset basic model based on the verification result, returning to the step of dividing the sample data set to obtain a training data set and a verification data set until the verification result meets the preset condition, and taking the preliminary distance prediction model as a distance prediction model.

and inputting the SOC value, the corrected SOC threshold value and the preset threshold value of the first power battery in each group of data in the verification data set into a preliminary distance prediction model, calculating the preliminary distance prediction model, outputting a distance verification value, and comparing the distance verification value with a difference value of a second distance in the corresponding group of data to obtain a difference value comparison result. And traversing each group of data in the verification data set and executing the steps. And screening to obtain data groups with difference comparison results larger than a preset difference preset value, and counting the number of the data groups. And calculating the ratio of the counted group number of the data groups to the group number of the total data groups in the verification data set. Judging whether the ratio is greater than or equal to a preset ratio preset value, if so, indicating that the preliminary distance prediction model verification fails; otherwise, if not, the verification of the preliminary distance prediction model is passed, and the preliminary distance prediction model is used as the distance prediction model.

And step S23, generating a range extender control strategy based on the corrected SOC threshold, the starting point of the corrected SOC threshold and the ending point of the corrected SOC threshold.

Specifically, generating a range extender control strategy based on the corrected SOC threshold, the starting point of the corrected SOC threshold, and the ending point of the corrected SOC threshold comprises:

step S231, when the vehicle runs to the starting point of the corrected SOC threshold value, controlling the starting threshold value of the range extender to be converted from the first SOC threshold value to the corrected SOC threshold value;

and step S232, when the vehicle runs to the end point of the corrected SOC threshold value, controlling the starting threshold value of the range extender to be converted from the corrected SOC threshold value to the first SOC threshold value.

In this embodiment, it is necessary to complete the process of controlling the starting threshold of the range extender to be converted from the first SOC threshold to the corrected SOC threshold before the vehicle enters the road section of the first type of road surface, and then to be converted from the corrected SOC threshold to the first SOC threshold, so as to ensure that when the vehicle enters the road section of the first type of road surface, the SOC value of the vehicle power battery is in a higher range, and the driving distance of the vehicle when the SOC value of the power battery is reduced to the first SOC threshold is extended, thereby reducing the low-power generation time of the range extender and improving the fuel economy of the transmitter. Meanwhile, when the SOC value of the power battery is reduced to the first SOC threshold value, the vehicle can be ensured to finish the running of the road section of the first type of road surface by the low-power generation of the range extender, the medium-high power generation is not needed, and the driving comfort is improved.

According to the range extender control strategy, correspondingly correcting the SOC threshold value of the range extender, and controlling the range extender to work based on the corrected SOC threshold value, wherein the method comprises the following steps:

when the vehicle runs to the starting point of the corrected SOC threshold value, the starting threshold value of the range extender is controlled to be converted from the first SOC threshold value to the corrected SOC threshold value, and the range extender is controlled to work based on the corrected SOC threshold value;

when the vehicle runs to the end point of the corrected SOC threshold value, the starting threshold value of the range extender is controlled to be converted from the corrected SOC threshold value to a first SOC threshold value, and the range extender is controlled to work based on the first SOC threshold value.

The embodiment of the present application further provides a range extender control device, referring to fig. 3, and fig. 3 is a schematic functional module diagram of the first embodiment of the range extender control device of the present application.

In this embodiment, the range extender control device includes:

the information acquisition module 10 is used for acquiring road condition information on a vehicle driving route;

the control strategy generating module 20 is configured to generate a range extender control strategy according to the road condition information;

and the control module 30 is configured to correspondingly 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.

the control strategy generation module comprises:

the correction unit is used for correcting the first SOC threshold value according to the mileage of the road section corresponding to the first type of road surface to obtain a corrected SOC threshold value;

a correction application determination unit for determining a start point and an end point of the corrected SOC threshold value on the vehicle travel route in accordance with a distance between the current position of the vehicle and a start point of a road section corresponding to the first type road surface;

and the control strategy generating unit is used for generating a range extender control strategy based on the corrected SOC threshold, the starting point of the corrected SOC threshold and the ending point of the corrected SOC threshold.

Optionally, the correction unit includes:

the correction factor acquisition subunit is used for determining a correction factor according to the mileage of the road section corresponding to the first type of road surface;

and the SOC threshold correction subunit is used for correcting the first SOC threshold according to the correction factor to obtain the corrected SOC threshold.

Optionally, the correction unit further includes:

and the secondary correction subunit is used for secondarily correcting the corrected SOC threshold value into a preset corrected SOC threshold value if the corrected SOC threshold value is larger than the preset corrected SOC threshold value.

Optionally, the control policy generating unit is configured to implement:

Optionally, the range extender control device further includes a judgment selection module, where the judgment selection module is configured to implement:

judging whether a first type of road surface exists on a vehicle driving route;

Optionally, the correction application determining unit includes:

the first judging subunit is used for judging whether the distance between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface is smaller than or equal to a first preset distance value or not;

a starting point determining subunit for implementing:

if the distance between the current position of the vehicle and the starting point of the road section corresponding to the first type road surface is smaller than or equal to a first preset distance value, the current position of the vehicle is a starting point of the corrected SOC threshold value on the vehicle driving route;

if the distance between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface is larger than a first preset distance value, determining a starting point of the corrected SOC threshold value on the driving route of the vehicle, wherein the distance between the starting point of the corrected SOC threshold value and the starting point of the road section 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 value is positioned between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface;

the vehicle position estimation subunit is used for determining the position of the vehicle when the SOC value of the power battery reaches a preset threshold value based on the current position of the vehicle, the starting point of the corrected SOC threshold value, the first SOC threshold value and the current SOC value of the power battery;

the second judging subunit is used for judging whether the position of the vehicle is located between the current position of the vehicle and the starting point of the road section corresponding to the first type road surface when the SOC value of the power battery reaches the full value;

an end point determining subunit for implementing:

if the position of the vehicle is not located between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface when the SOC value of the power battery reaches a preset threshold value, determining an end point of the corrected SOC threshold value on a vehicle driving route, wherein the distance between the end point of the corrected SOC threshold value and the starting point of the road section corresponding to the first type of road surface is equal to a second preset distance value, and the end point of the corrected SOC threshold value is located between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface;

if the position of the vehicle is located between the current position of the vehicle and the starting point of the road section corresponding to the first type of road surface when the SOC value of the power battery reaches a preset threshold value, judging whether the distance between the position of the vehicle and the starting point of the road section corresponding to the first type of road surface is larger than a second preset distance value when the SOC value of the power battery reaches the preset threshold value;

if the distance between the position of the vehicle and the starting point of the road section corresponding to the first type road surface is larger than a second preset distance value when the SOC value of the power battery reaches a preset threshold value, the position of the vehicle is a starting point of correcting the SOC threshold value when the SOC value of the power battery reaches the preset threshold value on the vehicle running route;

and if the distance between the position of the vehicle and the starting point of the road section corresponding to the first type of road surface is smaller than or equal to a second preset distance value when the SOC value of the power battery reaches a preset threshold value, determining an end point of the corrected SOC threshold value on the vehicle driving route, wherein the distance between the end point of the corrected SOC threshold value and the starting point of the road section corresponding to the first type of road surface is equal to the second preset distance value.

The specific implementation of the range extender control device of the present application is substantially the same as the embodiments of the range extender control method described above, and is not described herein again.

The embodiment of the application further provides a vehicle, the vehicle includes the range extender and the range extender control device as above:

The embodiment of the application also provides a storage medium, wherein a range extender control program is stored on the storage medium, and when being executed by a processor, the range extender control program realizes the steps of the range extender control method.

The specific implementation of the storage medium of the present application is substantially the same as the embodiments of the control method of the range extender, and is not described herein again.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present application may be substantially or partially embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims

1. A range extender control method is characterized by comprising the following steps:

acquiring road condition information on a vehicle driving route;

2. The range extender control method of claim 1, wherein the road condition information comprises a mileage of a road segment corresponding to a first type of road surface and a distance between a current position of a vehicle and a starting point of the road segment corresponding to the first type of road surface, wherein the first type of road surface comprises at least one of a steep road surface, a congested road surface, an icy and snowy road surface and a bumpy road surface;

3. The range extender control method of claim 2, wherein the step of modifying the first SOC threshold value according to the mileage of the road segment corresponding to the first type of road surface to obtain a modified SOC threshold value comprises:

4. The range extender control method of claim 3, wherein the step of modifying the first SOC threshold value according to the mileage of the road segment corresponding to the first type of road surface to obtain a modified SOC threshold value further comprises:

5. The range extender control method of claim 2, wherein the step of generating a range extender control strategy based on the modified SOC threshold value, the start point of the modified SOC threshold value, and the end point of the modified SOC threshold value comprises:

6. The method for controlling a range extender of claim 1, wherein the step of obtaining the traffic information on the driving route of the vehicle further comprises, before the step of obtaining the traffic information on the driving route of the vehicle:

judging whether a first type of road surface exists on a vehicle driving route;

7. A range extender control device, comprising:

8. A range extender control apparatus, characterized in that the apparatus comprises: a memory, a processor, and a range extender control program stored on the memory and executable on the processor, the range extender control program configured to implement the steps of the range extender control method of any of claims 1 to 6.

9. A storage medium having a range extender control program stored thereon, the range extender control program, when executed by a processor, implementing the steps of the range extender control method of any one of claims 1 to 6.

10. A vehicle characterized by comprising a range extender and the range extender control device recited in claim 7: