阅读说明：本技术 一种充电提示方法、装置及汽车 (Charging prompting method and device and automobile ) 是由 张嵩 杨国亮 周炳峰 安振 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种充电提示方法、装置及汽车,该方法应用于整车控制器VCU,包括：获取电池的剩余电量；在所述电池的剩余电量小于第一电量阈值时,获取车辆的续驶里程；获取车辆当前位置与目标充电桩位置之间的第一距离；所述目标充电桩是与车辆距离最近的充电桩；根据所述车辆的续驶里程和所述第一距离,控制中控娱乐系统EHU进行充电提示。本发明的充电提示方法,能够使用户及时了解车辆当前状态下有效的续驶里程范围内无法充电的风险,避免了因电动汽车不能及时充电,最终电量耗尽趴窝的问题,提升了用户体验。(The invention discloses a charging prompting method, a charging prompting device and an automobile, wherein the method is applied to a VCU (vehicle control unit) and comprises the following steps: acquiring the residual electric quantity of the battery; when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, acquiring the driving range of the vehicle; acquiring a first distance between the current position of the vehicle and the position of the target charging pile; the target charging pile is the charging pile closest to the vehicle; and controlling the central control entertainment system EHU to carry out charging prompt according to the driving range of the vehicle and the first distance. According to the charging prompting method, the user can know the risk that the electric vehicle cannot be charged within the effective driving range in the current state in time, the problem that the electric vehicle cannot be charged in time and finally the electric quantity is exhausted and the user experience is improved.)

1. A charging prompting method is applied to a VCU of a vehicle control unit and comprises the following steps:

acquiring the residual electric quantity of the battery;

when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, acquiring the driving range of the vehicle;

acquiring a first distance between the current position of the vehicle and the position of the target charging pile; the target charging pile is the charging pile closest to the vehicle;

and controlling the central control entertainment system EHU to carry out charging prompt according to the driving range of the vehicle and the first distance.

2. The charge presentation method according to claim 1, wherein the remaining capacity of the battery is detected and fed back in real time by a Battery Management System (BMS).

3. The charge presentation method of claim 1, wherein obtaining the driving range of the vehicle when the remaining capacity of the battery is less than a first capacity threshold comprises:

when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, acquiring the available capacity of the battery, wherein the available capacity is detected and fed back in real time through a Battery Management System (BMS);

and calculating the driving range of the vehicle according to the available capacity of the battery.

4. The charging prompting method of claim 1, wherein obtaining a first distance between a current position of the vehicle and a position of the target charging pile comprises:

sending a first positioning instruction to a central control entertainment system (EHU) so that the EHU can obtain a first distance between the current position of the vehicle and the position of a target charging pile according to the first positioning instruction and feed the first distance back to the VCU, wherein the first distance is obtained by the EHU through controlling a starting navigation system;

receiving the first distance of the EHU feedback.

5. The charging prompting method according to claim 1 or 4, wherein the target charging pile position is a position of a charging pile closest to the current position of the vehicle, which is obtained by the central control entertainment system EHU by searching for charging piles within a preset range from the current position of the vehicle and common charging pile positions;

wherein, stake position includes commonly used charging: the historical charging position of the vehicle recorded by the EHU and the charging pile position set by the user.

6. The charge presentation method according to claim 1 or 3, wherein the driving range of the vehicle includes:

the first driving range of the vehicle in the current mode and the second driving range of the vehicle in the super power-saving mode.

7. The charging prompting method according to claim 6, wherein the controlling a central entertainment system (EHU) to perform charging prompting according to the driving range of the vehicle and the first distance comprises:

when the first driving range is smaller than a first threshold value, sending a first control instruction to a central control entertainment system (EHU) so that the EHU displays first charging prompt information according to the first control instruction;

wherein the first threshold is determined from the first distance;

the first charging prompt message includes at least one of:

a navigation interface marked with the position of the target charging pile;

the quick start soft key of the navigation system is used for controlling the navigation system which is marked with a navigation route from the current position of the vehicle to the position of the target charging pile to be started when a user triggers the quick start soft key of the navigation system;

and the warning information is used for prompting the user that the charging is required to be carried out as soon as possible.

8. The charge presentation method of claim 7, wherein after the EHU displays a first charge presentation message according to the first control instruction, further comprising:

when the second driving range is smaller than a second threshold value, sending a second control instruction to the EHU, so that the EHU displays second charging prompt information according to the second control instruction;

wherein the second threshold is determined from the first distance;

the second charging prompt message includes at least one of:

a navigation interface marked with the position of the target charging pile;

warning information for prompting a user to charge as soon as possible and starting a super power-saving mode;

the quick start soft key of the navigation system is used for controlling the navigation system which is marked with a navigation route from the current position of the vehicle to the position of the target charging pile to be started when a user triggers the quick start soft key of the navigation system;

the quick-start soft key in the super power-saving mode is used for controlling a vehicle to start the super power-saving mode when a user triggers the soft key.

9. A charging prompting device is applied to a VCU (vehicle control unit), and comprises:

the first acquisition module is used for acquiring the residual electric quantity of the battery;

the second acquisition module is used for acquiring the driving range of the vehicle when the residual electric quantity of the battery is smaller than the first electric quantity threshold value;

the third acquisition module is used for acquiring a first distance between the current position of the vehicle and the position of the target charging pile;

the target charging pile is the charging pile closest to the vehicle;

and the control module is used for controlling the central control entertainment system EHU to carry out charging prompt according to the driving range of the vehicle and the first distance.

10. An automobile, characterized in that the automobile comprises a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor implementing the steps of the charge presentation method according to any one of claims 1 to 8 when executing the computer program.

11. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the charge alert method according to any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of automobiles, in particular to a charging prompting method and device and an automobile.

Background

With the improvement of electric automobile technology, more and more people select electric automobiles as travel tools. However, as the charging pile is far from being widely distributed at a gas station, the problem of mileage anxiety is more prominent when a user uses an electric vehicle. Especially when the user drives the electric motor car and goes out, often can lead to electric automobile can not in time charge because the driver can not in time know the risk that can't charge in the effectual continuation of the journey mileage within range under the vehicle current state, and the problem of the nest of lying prone is exhausted to final electric quantity, influences user experience.

Disclosure of Invention

In order to solve the technical problems, the invention provides a charging prompting method, a charging prompting device and an automobile, and solves the problems that an electric automobile cannot be charged in time and finally the electric quantity is exhausted and a groveling is caused because a driver cannot know the risk that the electric automobile cannot be charged in an effective driving range under the current state in time.

According to an aspect of the present invention, there is provided a charging prompt method applied to a Vehicle Control Unit (VCU), including:

acquiring the residual electric quantity of the battery;

when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, acquiring the driving range of the vehicle;

acquiring a first distance between the current position of the vehicle and the position of the target charging pile; the target charging pile is the charging pile closest to the vehicle;

and controlling the central control entertainment system EHU to carry out charging prompt according to the driving range of the vehicle and the first distance.

Optionally, the remaining power of the Battery is detected and fed back in real time by a Battery Management System (BMS).

Optionally, when the remaining power of the battery is less than the first power threshold, obtaining a driving range of the vehicle includes:

when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, acquiring the available capacity of the battery, wherein the available capacity is detected and fed back in real time through a Battery Management System (BMS);

and calculating the driving range of the vehicle according to the available capacity of the battery.

Optionally, obtaining a first distance between the current position of the vehicle and the position of the target charging pile includes:

sending a first positioning instruction to a central control Entertainment system (EHU) so that the EHU obtains a first distance between the current position of a vehicle and the position of a target charging pile according to the first positioning instruction and feeds the first distance back to the VCU, wherein the first distance is obtained by the EHU through controlling a navigation system to be started;

receiving the first distance of the EHU feedback.

Optionally, the target charging pile position is a position of a charging pile closest to the current position of the vehicle, which is obtained by the central control entertainment system EHU by searching charging piles within a preset range away from the current position of the vehicle and common charging pile positions;

wherein, stake position includes commonly used charging: the historical charging position of the vehicle recorded by the EHU and the charging pile position set by the user.

Optionally, the driving range of the vehicle includes:

the first driving range of the vehicle in the current mode and the second driving range of the vehicle in the super power-saving mode.

Optionally, the controlling the central control entertainment system EHU to perform the charging prompt according to the driving range of the vehicle and the first distance includes:

when the first driving range is smaller than a first threshold value, sending a first control instruction to a central control entertainment system (EHU) so that the EHU displays first charging prompt information according to the first control instruction;

wherein the first threshold is determined from the first distance;

the first charging prompt message includes at least one of:

a navigation interface marked with the position of the target charging pile;

the quick start soft key of the navigation system is used for controlling the navigation system which is marked with a navigation route from the current position of the vehicle to the position of the target charging pile to be started when a user triggers the quick start soft key of the navigation system;

and the warning information is used for prompting the user that the charging is required to be carried out as soon as possible.

Optionally, after the EHU displays the first charging prompt message according to the first control instruction, the method further includes:

when the second driving range is smaller than a second threshold value, sending a second control instruction to the EHU, so that the EHU displays second charging prompt information according to the second control instruction;

wherein the second threshold is determined from the first distance;

the second charging prompt message includes at least one of:

a navigation interface marked with the position of the target charging pile;

warning information for prompting a user to charge as soon as possible and starting a super power-saving mode;

the quick start soft key of the navigation system is used for controlling the navigation system which is marked with a navigation route from the current position of the vehicle to the position of the target charging pile to be started when a user triggers the quick start soft key of the navigation system;

the quick-start soft key in the super power-saving mode is used for controlling a vehicle to start the super power-saving mode when a user triggers the soft key.

According to another aspect of the present invention, there is provided a charging prompting device applied to a vehicle control unit VCU, including:

the first acquisition module is used for acquiring the residual electric quantity of the battery;

the second acquisition module is used for acquiring the driving range of the vehicle when the residual electric quantity of the battery is smaller than the first electric quantity threshold value;

the third acquisition module is used for acquiring a first distance between the current position of the vehicle and the position of the target charging pile;

the target charging pile is the charging pile closest to the vehicle;

and the control module is used for controlling the central control entertainment system EHU to carry out charging prompt according to the driving range of the vehicle and the first distance.

According to a further aspect of the present invention, there is provided an automobile comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the charge alert method as described above when executing the computer program.

According to a further aspect of the present invention, a computer-readable storage medium is provided, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the charge alert method as described above.

The embodiment of the invention has the beneficial effects that:

in the scheme, the residual electric quantity of the battery is obtained; when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, acquiring the driving range of the vehicle; acquiring a first distance between the current position of the vehicle and the position of the target charging pile; the target charging pile is the charging pile closest to the vehicle; and controlling the central control entertainment system EHU to carry out charging prompt according to the driving range of the vehicle and the first distance. Can make the user in time know the risk that can't charge under the effectual continuation of the journey within range of vehicle current state, avoid because of electric automobile can not in time charge, the problem of nest is gone prone to final electric quantity exhaustion has promoted user experience.

Drawings

Fig. 1 is a flowchart illustrating a charging prompt method according to an embodiment of the present invention;

fig. 2 shows a second flowchart of a charging prompt method according to an embodiment of the invention;

fig. 3 is a block diagram showing a configuration of a charge presentation device according to an embodiment of the present invention;

fig. 4 is a control architecture diagram illustrating a charging alert method according to an embodiment of the present invention;

fig. 5 shows a third flowchart of a charging prompting method according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

As shown in fig. 1, an embodiment of the present invention provides a charging prompting method applied to a vehicle control unit VCU, including:

and step 11, acquiring the residual capacity of the battery.

Optionally, the remaining capacity of the battery is detected and fed back in real time by a battery management system BMS.

Specifically, the State of charge (SOC) of the power battery is detected in real time by the BMS, the SOC reflects the remaining capacity of the battery, and is numerically defined as a ratio of the remaining capacity to the battery capacity, and is expressed in terms of percentage.

And 12, when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, acquiring the driving range of the vehicle.

In this embodiment, it is preferable that the driving range of the vehicle is acquired when the SOC reflecting the remaining amount of power battery is lower than 30%. Wherein, 30% is a calibratable value, but not limited thereto. The driving range of the vehicle refers to an effective range within which the remaining electric energy can continue to drive.

Specifically, when the remaining capacity of the battery is less than a first capacity threshold, obtaining a driving range of the vehicle includes:

when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, acquiring the available capacity of the battery, wherein the available capacity is detected and fed back in real time through a Battery Management System (BMS);

and calculating the driving range of the vehicle according to the available capacity of the battery.

In this embodiment, calculating the driving range of the vehicle according to the available capacity of the battery includes: and calculating the driving range of the vehicle according to the ratio of the available capacity of the battery to the average capacity used per kilometer.

Step 13, acquiring a first distance between the current position of the vehicle and the position of the target charging pile; the target charging pile is a charging pile closest to the vehicle.

In this embodiment, the first distance is a distance between the current position of the vehicle and an available charging pile (target charging pile) closest to the vehicle, that is, a distance between the vehicle and the closest charging pile.

And step 14, controlling the central control entertainment system EHU to carry out charging prompt according to the driving range of the vehicle and the first distance.

In this embodiment, the risk that charging cannot be performed within the effective driving range is identified in advance by the driving range of the vehicle and the first distance, and the EHU is controlled to perform charging prompt. The user can timely master the charging demand and the loss risk of the vehicle, and the situation that the vehicle cannot be charged in time to cause electric quantity exhaustion and cannot run is avoided. This scheme has ensured user's trip safety, has avoided the user because of failing to in time know the risk that can't charge under the vehicle current state effectual continuation of the journey mileage within range, leads to the problem of vehicle nest of lying prone, has promoted user's driving and has experienced, has strengthened electric automobile's competitiveness, has promoted electric automobile's science and technology and has felt.

As shown in fig. 2, in an alternative embodiment of the present invention, step 13, includes:

step 131, sending a first positioning instruction to an EHU (central control entertainment system) so that the EHU obtains a first distance between the current position of the vehicle and the position of a target charging pile according to the first positioning instruction and feeds the first distance back to the VCU, wherein the first distance is obtained by the EHU through controlling a starting navigation system;

step 132, receiving the first distance fed back by the EHU.

In this embodiment, when the remaining capacity of the battery is less than the first capacity threshold, the VCU sends a first positioning instruction to the EHU, the EHU controls the start of the navigation system according to the first positioning instruction, the EHU searches for available charging piles around the vehicle through the navigation system, calculates a first distance between the current position of the vehicle and the charging pile closest to the vehicle by using the navigation system, and sends the first distance to the VCU.

Specifically, in an optional embodiment of the present invention, the target charging pile position is a position of a charging pile closest to the current position of the vehicle, which is obtained by the central control entertainment system EHU by searching for charging piles within a preset range from the current position of the vehicle and positions of common charging piles;

wherein, stake position includes commonly used charging: the historical charging position of the vehicle recorded by the EHU and the charging pile position set by the user.

As one implementation, the historical charging locations include: when the charging of the same place exceeds the preset times, such as three times, the EHU marks the position as a common charging position; the driver can also set a certain charging pile position as a household/common charging pile position through the central control system.

Further, in an optional embodiment of the present invention, the driving range of the vehicle includes:

the first driving range of the vehicle in the current mode and the second driving range of the vehicle in the super power-saving mode.

As shown in fig. 2, when the driving range of the vehicle includes a first driving range in the current mode of the vehicle and a second driving range in the super power saving mode, step 14 includes:

step 141, when the first driving range is smaller than a first threshold value, sending a first control instruction to a central control entertainment system EHU, so that the EHU displays a first charging prompt message according to the first control instruction;

wherein the first threshold is determined from the first distance;

the first charging prompt message includes at least one of:

a navigation interface marked with the position of the target charging pile;

the quick start soft key of the navigation system is used for controlling the navigation system which is marked with a navigation route from the current position of the vehicle to the position of the target charging pile to be started when a user triggers the quick start soft key of the navigation system;

and the warning information is used for prompting the user that the charging is required to be carried out as soon as possible.

In this embodiment, as the first-stage charging prompt, when the first driving range is smaller than the first threshold, the EHU is controlled to display the first charging prompt information to the user through the control instruction, so as to realize charging prompt for the user. The first threshold value is related to the first distance, and the first distance refers to the distance between the current real-time position of the vehicle and the target charging pile. To ensure that the charging can be performed in time within the driving range of the vehicle, the first threshold value may include: the sum of the first distance and a fixed mileage value. Preferably, the fixed mileage value includes 5 km. That is, the first threshold is equal to the first distance +5 km. 5km is a preferred calibratable value, and is not limited thereto.

The quick opening of the soft key of the navigation system greatly facilitates the operation of a user.

Here, the warning message for prompting the user that charging needs to be performed as soon as possible may include: the characters prompt the driver that the vehicle has the risk of electricity exhaustion and groveling, and the driver should go to the nearest charging pile for charging.

Further, as shown in fig. 2, in an optional embodiment of the present invention, in step 14, after the EHU displays a first charging prompt message according to the first control instruction, the method further includes:

step 142, when the second driving range is smaller than a second threshold value, sending a second control instruction to the EHU, so that the EHU displays a second charging prompt message according to the second control instruction;

wherein the second threshold is determined from the first distance;

the second charging prompt message includes at least one of:

a navigation interface marked with the position of the target charging pile;

warning information for prompting a user to charge as soon as possible and starting a super power-saving mode;

the quick start soft key of the navigation system is used for controlling the navigation system which is marked with a navigation route from the current position of the vehicle to the position of the target charging pile to be started when a user triggers the quick start soft key of the navigation system;

the quick-start soft key in the super power-saving mode is used for controlling a vehicle to start the super power-saving mode when a user triggers the soft key.

In this embodiment, as the second-stage charging prompt, when the second driving range is smaller than the second threshold, the EHU is controlled to display the second charging prompt information to the user through the control instruction, so as to implement charging prompt for the user. The second threshold value is related to the first distance, and the first distance refers to the distance between the current real-time position of the vehicle and the target charging pile. To ensure that the charging can be performed in time within the range of the driving range of the vehicle, the second threshold value may include: the sum of the first distance and a fixed mileage value. Preferably, the fixed mileage value includes 5 km. I.e. the second threshold is equal to the first distance +5 km. 5km is a preferred calibratable value, not limited thereto.

The navigation system can quickly start the soft key and the super power-saving mode to effectively prompt the driver, so that the driver can conveniently operate.

Here, the warning message for prompting the user that the charging needs to be performed as soon as possible and the super power saving mode is turned on may include: the characters prompt that the risk of the driver that the vehicle runs out of electric quantity and bends over the pit is very high, and a super power-saving mode is started immediately and the driver goes to a nearest charging pile for charging; and an alarm tone. The warning information ensures effective prompt for the driver.

Above-mentioned scheme, vehicle control unit VCU is as the master control unit, monitor states such as vehicle SOC and continuation distance of driving, control EHU opens navigation locate function, the continuation distance of driving of contrast vehicle and EHU feedback fill electric pile nearest distance, send the control command that is used for carrying out the two-stage suggestion, indicate the driver in time to charge through EHU, the two-stage suggestion that VCU set up, emergency degree strengthens step by step, effectively discern the risk that can not charge in the available continuation distance scope of driving, make the driver can in time master the risk that can not in time charge in the vehicle effective range, effectively avoided the vehicle to lead to the electric quantity to exhaust because of can not in time charge, influence user driving safety and user's driving experience.

Corresponding to the method embodiment, the embodiment of the invention also provides a charging prompting device. The following describes a charging prompting device provided in an embodiment of the present invention.

As shown in fig. 3, a charging prompt device is shown, which is applied to a vehicle control unit VCU, and the device 300 includes:

a first obtaining module 301, configured to obtain a remaining power of a battery;

a second obtaining module 302, configured to obtain a driving range of the vehicle when a remaining power of the battery is less than a first power threshold;

a third obtaining module 303, configured to obtain a first distance between the current position of the vehicle and the position of the target charging pile; the target charging pile is the charging pile closest to the vehicle;

and the control module 304 is configured to control the central control entertainment system EHU to perform charging prompt according to the driving range of the vehicle and the first distance.

Optionally, the remaining capacity of the battery is detected and fed back in real time by a battery management system BMS.

Optionally, the second obtaining module 302 includes:

the first obtaining submodule is used for obtaining the available capacity of the battery when the residual electric quantity of the battery is smaller than a first electric quantity threshold value, and the available capacity is detected and fed back in real time through a Battery Management System (BMS);

and the second acquisition submodule is used for calculating the driving range of the vehicle according to the available capacity of the battery.

Optionally, the third obtaining module 303 includes:

the third acquisition submodule is used for sending a first positioning instruction to an EHU (central entertainment system) so that the EHU acquires a first distance between the current position of the vehicle and the position of the target charging pile according to the first positioning instruction and feeds the first distance back to the VCU, wherein the first distance is acquired by the EHU through controlling to start a navigation system;

a fourth obtaining submodule, configured to receive the first distance fed back by the EHU.

Optionally, the target charging pile position is a position of a charging pile closest to the current position of the vehicle, which is obtained by the central control entertainment system EHU by searching charging piles within a preset range away from the current position of the vehicle and common charging pile positions;

wherein, stake position includes commonly used charging: the historical charging position of the vehicle recorded by the EHU and the charging pile position set by the user.

Optionally, the driving range of the vehicle includes:

the first driving range of the vehicle in the current mode and the second driving range of the vehicle in the super power-saving mode.

Optionally, the control module 304 includes:

the first control submodule is used for sending a first control instruction to the EHU when the first driving range is smaller than a first threshold value, so that the EHU displays first charging prompt information according to the first control instruction;

wherein the first threshold is determined from the first distance;

the first charging prompt message includes at least one of:

a navigation interface marked with the position of the target charging pile;

the quick start soft key of the navigation system is used for controlling the navigation system which is marked with a navigation route from the current position of the vehicle to the position of the target charging pile to be started when a user triggers the quick start soft key of the navigation system;

and the warning information is used for prompting the user that the charging is required to be carried out as soon as possible.

Optionally, after the EHU displays the first charging prompt message according to the first control instruction, the control module 304 further includes:

the second control submodule is used for sending a second control instruction to the EHU when the second driving range is smaller than a second threshold value so that the EHU displays second charging prompt information according to the second control instruction;

wherein the second threshold is determined from the first distance;

the second charging prompt message includes at least one of:

a navigation interface marked with the position of the target charging pile;

warning information for prompting a user to charge as soon as possible and starting a super power-saving mode;

the quick start soft key of the navigation system is used for controlling the navigation system which is marked with a navigation route from the current position of the vehicle to the position of the target charging pile to be started when a user triggers the quick start soft key of the navigation system;

the quick-start soft key in the super power-saving mode is used for controlling a vehicle to start the super power-saving mode when a user triggers the soft key. Specifically, when the user triggers the soft key, the EHU sends a super power saving mode starting instruction to the VCU, and the VCU controls the vehicle to start the super power saving mode.

The device is a device corresponding to the method embodiment, and all implementation manners in the method embodiment are applicable to the device embodiment, and the same technical effects as the method embodiment can be achieved.

A control architecture of the present invention is described below in conjunction with fig. 4.

In fig. 4, the control architecture mainly includes VCU, BMS, and EHU. The VCU of the whole vehicle is used as a main control unit and receives information such as available capacity and SOC of the BMS, wherein the SOC is used as a judgment condition, the available capacity is used for calculating the driving range of the vehicle, after the VCU of the whole vehicle controls the EHU to start the navigation positioning system, the EHU controls the navigation positioning system to start so as to search for available charging piles around the vehicle, the calculated distance between the vehicle and the nearest available charging pile is sent to the VCU, and then the VCU judges whether the driving range of the vehicle has risks or not and prompts a driver to quickly search for the charging pile and switch the super power saving mode in time.

As an implementation method, under the control architecture shown in fig. 4, a control method of a charging prompt is described with reference to fig. 5.

In fig. 5, the main controllers of the charge presentation function are VCU and EHU, and the auxiliary controller includes BMS.

The battery management system BMS mainly has the functions of monitoring the state of the power battery, transmitting the available capacity and SOC of the power battery in real time and supporting the VCU to calculate the driving range of the vehicle.

As shown in fig. 5, the VCU serves as a main control unit and is responsible for monitoring the state of the entire vehicle, calculating the driving range, and controlling the EHU to operate. The VCU control flow comprises the following steps:

step 51, the VCU detects whether the entire vehicle is Ready: if not, continuing to detect;

if so, step 52 is entered.

Step 52, detecting that the SOC of the power battery is less than or equal to 30%:

if not, continuing monitoring;

if yes, calculating the driving range of the vehicle in the current mode/super power saving mode according to the available capacity of the power battery fed back by the BMS and the state of the whole vehicle, sending a navigation positioning starting command to the EHU, receiving the closest distance between the vehicle and the charging pile sent by the EHU, and entering step 53;

step 53, the VCU detects that "the driving range in the vehicle normal mode is less than or equal to the closest distance +5 km":

if not, continuing to detect;

if yes, the VCU sends the prompt level 1 to the EHU, and then the process goes to step 54;

step 54, the VCU detects that "the driving range in the super power saving mode of the vehicle is less than or equal to the nearest distance +5 km":

if not, continuing to detect;

if yes, the VCU sends the prompt level of 2 to the EHU.

Further, as shown in fig. 5, the EHU is used as a main control unit, and can record a common charging location, and respond to a control instruction of the VCU to control the navigation and positioning system to search for information of the charging pile around the vehicle, and calculate a closest distance. The control flow of the EHU mainly comprises the following steps:

step 55, the EHU detects whether the entire vehicle is Ready:

if not, continuing to detect;

if yes, go to step 56;

step 56, detecting the charging state of the vehicle, positioning and recording the charging position information of the vehicle, and when the charging of the same place exceeds three times, marking the position as a common charging position by the EHU; the driver can also set the current position as a household/common charging position through the central control system, and the operation goes to step 57;

step 57, detecting that the "navigation positioning start command is 1":

if not, continuing to detect;

if so, the EHU starts a navigation positioning system, searches for the charging piles around the vehicle and the marked common charging positions, calculates the nearest distance from the nearest charging position to the vehicle, sends the nearest distance to the VCU, and enters step 58;

step 58, detecting that the prompt level is 1:

if not, go to step 59;

if so, displaying a navigation interface by the central control, marking the position information of the latest charging pile, prompting a driver of the vehicle to have the risk of groveling when the electric quantity is exhausted, charging the latest charging pile by the characters, and displaying a navigation instruction key;

step 59, detecting that the prompt level is 2:

if not, continuing to detect;

if yes, the central control displays a navigation interface, the position information of the latest charging pile is marked, the characters prompt a driver that the risk of the vehicle that the electric quantity of the vehicle is exhausted is very high, the super power-saving mode is immediately started and the driver goes to the nearest charging pile to charge, the EHU displays a navigation starting instruction and starts a soft key of the super power-saving mode, and the EHU sends a suitable alarm sound to warn the driver.

According to the scheme, the VCU of the vehicle controller monitors the electric quantity of the power battery in real time, when the SOC of the residual electric quantity of the power battery is lower than 30% (can be calibrated), the VCU controls the starting of the whole vehicle navigation positioning system, positions the vehicle, searches for available charging piles around the vehicle, and calculates the nearest distance between the vehicle and the nearest available charging pile in real time. Contrast vehicle driving range and EHU feedback under the current mode fill electric pile nearest distance, send two-stage suggestion instruction, in time charge through EHU suggestion driver, VCU sets up the two-stage suggestion: in the first stage, when the driving range of the vehicle in the normal mode is less than or equal to the sum of the shortest distance (first distance) and a fixed range, the VCU prompts a driver to search for the nearest charging pile through central control to charge; and in the second stage, when the driving range in the super power saving mode is less than or equal to the sum of the closest distance (the first distance) and a fixed range, the VCU prompts the driver to start the super power saving mode and is accompanied with warning sound. The emergency degree of the two-stage reminding is strengthened step by step, and the risk that the charging cannot be carried out within the effective driving range is identified in advance.

Further, after receiving a VCU navigation positioning starting instruction, the EHU automatically searches for the charging pile information around the vehicle, including the set and marked common charging pile information, automatically identifies and calculates the charging pile closest to the current position of the vehicle, sends the closest distance to the VCU, and sets a navigation/super power saving mode starting shortcut key; the EHU is used for automatically positioning and recording the vehicle charging position information, when the charging time of the same place exceeds 3 times, the position is automatically marked as a common charging position, and a driver can also set the current position as a household/common charging position through the EHU; the accuracy and comprehensiveness of the navigation positioning system in detecting the nearest charging position are improved, and false alarm is avoided. The navigation positioning system is automatically started after the vehicle meets the conditions, the risk of electricity exhaustion and groveling existing in the current state of the vehicle is calculated, a driver is prompted to search for a charging pile for charging in advance, and driving safety is guaranteed; by setting text information, alarm sound and function starting shortcut keys, the driver is effectively prompted, and the driver is convenient to operate; the scheme utilizes the existing configuration of the vehicle to realize the function, the control method is simple and reliable, the technological sense of the electric vehicle is improved, and the competitiveness of the electric vehicle is enhanced.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.