CN111186339A - Vehicle control method and system and vehicle - Google Patents

Vehicle control method and system and vehicle Download PDF

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Publication number
CN111186339A
CN111186339A CN201811355572.6A CN201811355572A CN111186339A CN 111186339 A CN111186339 A CN 111186339A CN 201811355572 A CN201811355572 A CN 201811355572A CN 111186339 A CN111186339 A CN 111186339A
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Prior art keywords
vehicle
speed
power
discharge power
peak discharge
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CN201811355572.6A
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CN111186339B (en
Inventor
王言子
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Beijing Treasure Car Co Ltd
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Beijing Treasure Car Co Ltd
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Priority to CN201811355572.6A priority Critical patent/CN111186339B/en
Priority to PCT/CN2019/071821 priority patent/WO2020098147A1/en
Publication of CN111186339A publication Critical patent/CN111186339A/en
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Publication of CN111186339B publication Critical patent/CN111186339B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/12—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2260/00—Operating Modes
    • B60L2260/40—Control modes
    • B60L2260/50—Control modes by future state prediction
    • B60L2260/54—Energy consumption estimation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The disclosure relates to a vehicle control method, a system and a vehicle, wherein the method comprises the following steps: acquiring running information and battery information of a vehicle, wherein the running information comprises a preset speed threshold value, a maximum running speed and a target running path of the vehicle, and the battery information comprises residual electric quantity and peak discharge power of a battery pack of the vehicle; determining the power consumption of the vehicle according to the target running path, the maximum running speed and the peak discharge power; and when the power consumption of the vehicle is at least larger than the residual power, adjusting the maximum running speed and/or the peak discharge power according to the preset speed threshold. According to the technical scheme provided by the disclosure, when the residual electric quantity of the battery pack of the vehicle cannot enable the vehicle to reach the destination, the discharging power of the battery pack can be improved by adjusting the maximum driving speed of the vehicle and/or the peak discharging power of the battery pack, so that the electric power consumption of the vehicle is reduced, and the vehicle can reach the destination.

Description

Vehicle control method and system and vehicle
Technical Field
The present disclosure relates to the field of vehicle technologies, and in particular, to a vehicle control method, system, and vehicle.
Background
The driving range of the vehicle is always one of the concerns of the user, and some vehicles with limited battery pack capacity may be forced to stop due to insufficient remaining power during driving, so that the driver cannot reach the destination. Therefore, it is important to reduce the power consumption of the battery pack to enable the vehicle to reach the destination when the capacity of the battery pack is limited.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a vehicle control method, system and vehicle.
In order to achieve the above object, the present disclosure provides a vehicle control method including:
acquiring running information and battery information of a vehicle, wherein the running information comprises a preset speed threshold value, a maximum running speed and a target running path of the vehicle, and the battery information comprises residual electric quantity and peak discharge power of a battery pack of the vehicle;
determining the power consumption of the vehicle according to the target running path, the maximum running speed and the peak discharge power;
and when the power consumption of the vehicle is at least larger than the residual power, adjusting the maximum running speed and/or the peak discharge power according to the preset speed threshold.
Optionally, the adjusting the maximum driving speed according to the preset speed threshold includes:
calculating a candidate maximum driving speed according to the maximum driving speed and a preset speed variation;
if the candidate maximum driving speed is larger than or equal to the preset speed threshold value, determining the power consumption of the vehicle according to the target driving path, the candidate maximum driving speed and the peak discharge power;
and if the power consumption of the vehicle is less than or equal to the residual power, taking the candidate maximum driving speed as a new maximum driving speed.
Optionally, the adjusting the maximum driving speed according to the preset speed threshold further includes:
and if the power consumption of the vehicle is greater than the residual power, taking the candidate maximum driving speed as a new maximum driving speed, and executing the step of calculating the candidate maximum driving speed according to the maximum driving speed and a preset speed variation to determine the power consumption of the vehicle according to the target driving path, the candidate maximum driving speed and the peak discharge power again until the power consumption of the vehicle is less than or equal to the residual power.
Optionally, the method further comprises:
if the candidate maximum driving speed is smaller than the preset speed threshold, executing the following operations:
acquiring road condition information in front of the vehicle and determining a new target driving path according to the road condition information; and/or
And acquiring charging pile information in a preset area of the vehicle, and outputting prompt information according to the charging pile information.
Optionally, the adjusting the peak discharge power according to the preset speed threshold includes:
calculating candidate peak discharge power according to the peak discharge power and a preset discharge power variation;
determining a new maximum driving speed corresponding to the candidate peak discharge power according to a preset corresponding relation between the peak discharge power and the maximum driving speed of the vehicle;
if the new maximum driving speed is larger than or equal to the preset speed threshold value, determining the power consumption of the vehicle according to the target driving path, the new maximum driving speed and the candidate peak discharge power;
and if the power consumption of the vehicle is less than or equal to the residual power, taking the candidate peak discharge power as a new peak discharge power.
Optionally, the adjusting the peak discharge power according to the preset speed threshold further includes:
and if the power consumption of the vehicle is greater than the residual power, taking the candidate peak discharge power as a new peak discharge power, and executing the step of calculating the candidate peak discharge power according to the peak discharge power and a preset discharge power variation to determine the power consumption of the vehicle according to the target running path, the new maximum running speed and the candidate peak discharge power again until the power consumption of the vehicle is less than or equal to the residual power.
Optionally, the adjusting the maximum driving speed and/or the peak discharge power according to the preset speed threshold includes:
if the target driving path comprises a high-speed road section and a non-high-speed road section, acquiring the lowest speed limit value of the high-speed road section;
on the non-high-speed road section, adjusting the maximum driving speed and/or the peak discharge power according to the preset speed threshold;
and in the high-speed road section, taking the lowest speed limit value as a new preset speed threshold value, and adjusting the maximum driving speed and/or the peak discharge power according to the new preset speed threshold value.
Optionally, the adjusting the maximum driving speed and/or the peak discharge power according to the preset speed threshold when at least the power consumption amount of the vehicle is greater than the remaining power amount includes:
when the power consumption of the vehicle is greater than the residual power, outputting prompt information for indicating adjustment of the maximum driving speed and/or the peak discharge power;
adjusting the maximum driving speed and/or the peak discharge power upon receiving a request instruction for instructing adjustment of the maximum driving speed and/or the peak discharge power.
The present disclosure also provides a vehicle control system, comprising:
the navigation module is used for acquiring the running information of a vehicle, and the running information comprises a preset speed threshold value, a maximum running speed and a target running path of the vehicle;
the power supply management module is used for acquiring battery information of the vehicle, wherein the battery information comprises the residual electric quantity and the peak discharge power of a battery pack of the vehicle;
the vehicle control unit is respectively connected with the navigation module and the power management module and is used for determining the power consumption of the vehicle according to the target running path, the maximum running speed and the peak discharge power; and when the power consumption of the vehicle is at least larger than the residual power, adjusting the maximum running speed of the vehicle and/or the peak discharge power according to the preset speed threshold.
Optionally, the vehicle control unit is configured to:
calculating a candidate maximum driving speed according to the maximum driving speed and a preset speed variation;
determining the power consumption of the vehicle according to the target driving path, the candidate maximum driving speed and the peak discharge power when the candidate maximum driving speed is greater than or equal to the preset speed threshold;
and when the power consumption of the vehicle is less than or equal to the residual power, taking the candidate maximum driving speed as a new maximum driving speed.
Optionally, the vehicle control unit is further configured to:
and when the power consumption of the vehicle is greater than the residual power, taking the candidate maximum driving speed as a new maximum driving speed, and executing the step of calculating the candidate maximum driving speed according to the maximum driving speed and a preset speed variation to determine the power consumption of the vehicle according to the target driving path, the candidate maximum driving speed and the peak discharge power again until the power consumption of the vehicle is less than or equal to the residual power.
Optionally, the system further comprises:
the human-computer interaction module is connected with the vehicle control unit and used for acquiring road condition information in front of the vehicle and determining a new target driving path according to the road condition information when the candidate maximum driving speed is smaller than the preset speed threshold; and/or
And acquiring charging pile information in a preset area of the vehicle, and outputting prompt information according to the charging pile information.
Optionally, the vehicle control unit is configured to:
calculating candidate peak discharge power according to the peak discharge power and a preset discharge power variation;
determining a new maximum driving speed corresponding to the candidate peak discharge power according to a preset corresponding relation between the peak discharge power and the maximum driving speed of the vehicle;
determining the power consumption of the vehicle according to the target driving path, the new maximum driving speed and the candidate peak discharge power when the new maximum driving speed is greater than or equal to the preset speed threshold;
and when the power consumption of the vehicle is less than or equal to the residual power, taking the candidate peak discharge power as a new peak discharge power.
Optionally, the vehicle control unit is further configured to:
and when the power consumption of the vehicle is larger than the residual power, taking the candidate peak discharge power as a new peak discharge power, and executing the step of calculating the candidate peak discharge power according to the peak discharge power and a preset discharge power variation until the power consumption of the vehicle is determined according to the target running path, the new maximum running speed and the candidate peak discharge power again until the power consumption of the vehicle is smaller than or equal to the residual power.
Optionally, the vehicle control unit is configured to:
when the target driving path comprises a high-speed road section and a non-high-speed road section, acquiring the lowest speed limit value of the high-speed road section;
on the non-high-speed road section, adjusting the maximum driving speed and/or the peak discharge power according to the preset speed threshold;
and in the high-speed road section, taking the lowest speed limit value as a new preset speed threshold value, and adjusting the maximum driving speed and/or the peak discharge power according to the new preset speed threshold value.
Optionally, the vehicle control unit is configured to:
when the power consumption of the vehicle is greater than the residual power, sending a control signal to the human-computer interaction module;
the human-computer interaction module is used for:
outputting prompt information for instructing to adjust the maximum driving speed and/or the peak discharge power in response to the control signal;
when a request instruction for instructing adjustment of the maximum running speed and/or the peak discharge power is received, transmitting instruction information to the vehicle control unit;
the vehicle control unit is further configured to:
adjusting the maximum driving speed and/or the peak discharge power in response to the indication information.
The present disclosure also provides a vehicle including the vehicle control system provided by the present disclosure.
By adopting the technical scheme, the following technical effects can be at least achieved:
and determining the power consumption of the vehicle according to the acquired target running path, the maximum running speed and the peak discharge power, and adjusting the maximum running speed and/or the peak discharge power when the power consumption of the vehicle is at least larger than the residual power, so that the discharge efficiency of a vehicle battery pack can be improved, the power consumption of the vehicle is reduced, and the vehicle can reach a destination.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a vehicle control method according to an exemplary embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating a vehicle control method according to another exemplary embodiment of the present disclosure;
FIG. 3 is a flow chart illustrating a vehicle control method according to another exemplary embodiment of the present disclosure;
FIG. 4 is a flow chart illustrating a vehicle control method according to another exemplary embodiment of the present disclosure;
FIG. 5 is a block diagram illustrating a vehicle control system according to an exemplary embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
FIG. 1 shows a flow chart of a vehicle control method according to an exemplary embodiment of the present disclosure, as shown in FIG. 1, the method comprising the steps of:
in step S101, driving information of the vehicle including a preset speed threshold value, a maximum driving speed, and a target driving path of the vehicle and battery information including a remaining amount of a battery pack of the vehicle and a peak discharge power are acquired.
In one embodiment, the target travel path of the vehicle may be obtained by a navigation module of the vehicle. Specifically, the current position of the vehicle can be acquired through a GPS positioning unit in the navigation module, an online map preset in the navigation module is inquired according to the current position of the vehicle and an input destination, road condition information between the current position and the destination can be acquired, at least one driving path is planned according to the road condition information, the at least one driving path is displayed for a driver, the driver selects and inputs the selected driving path according to the at least one driving path, and the target driving mileage of the vehicle can be determined according to the driving path.
In addition, the vehicle control method according to the embodiment of the disclosure may be applied before the vehicle is started, and may also be applied during the running of the vehicle. In the former case, the maximum traveling speed of the vehicle may be set in advance, for example, a default value at the time of shipment of the vehicle, or a numerical value set by the driver as needed; in the latter case, the maximum driving speed obtained may be, for example, the maximum driving speed reached by the vehicle during the period from the departure time to the current time.
It should be noted that the preset speed threshold may be a default value or a value set by the driver as needed. In addition, the minimum driving speed requirement of the vehicle on certain road sections can be considered, and the minimum driving speed requirement can be determined according to the target driving path. For example, the target driving path includes a high speed section, and if the speed limit of the high speed section is 90km/h, the preset speed threshold value can be set to 90 km/h.
The battery information of the vehicle may be acquired by a power management module of the vehicle, specifically, the battery management module may acquire information of SOC (State of Charge), SOH (Section of Health), temperature, and the like of the battery pack, and may calculate the remaining power of the battery pack corresponding to the currently acquired information of SOC, SOH, temperature, and the like through a preset corresponding relationship between the information and the remaining power.
The peak discharge power of the battery pack may be a default value at the time of shipment of the vehicle, or may be a value set as needed, for example, the peak discharge power may be set to 90 kW.
If the vehicle control method is applied to the driving process of the vehicle, the obtained peak discharge power may be, for example, the peak discharge power reached by the battery pack of the vehicle during the period from the departure time to the current time.
In step S102, the power consumption amount of the vehicle is determined based on the target travel path, the maximum travel speed, and the peak discharge power.
In one embodiment, a target mileage of the vehicle may be determined according to the target travel path, and power consumption amounts corresponding to the target mileage, the maximum travel speed, and the peak discharge power may be determined according to a preset correspondence relationship between the mileage, the travel speed, the discharge power of the battery pack, and the power consumption amount of the vehicle.
In another embodiment, the power consumption of the vehicle may be first estimated by the SOC of the battery pack. Because the SOH of the battery pack and the temperature of the battery pack can influence the power consumption of the battery pack, the power consumption can be corrected according to the SOH and the temperature of the battery pack, and the residual power of the battery pack of the vehicle can be influenced due to the fact that the road condition of the running of the vehicle has influence on the discharging power of the battery pack, so that the power consumption of the vehicle can be further corrected according to the road condition of the running path selected by a driver, and the accurate power consumption of the vehicle can be finally obtained.
When the acquired power consumption amount is less than or equal to the remaining power amount, the vehicle may be considered to be able to reach the destination; if the acquired power consumption amount is larger than the remaining power amount, the vehicle may be considered to be unable to reach the destination, and in this case, step S103 is executed.
In step S103, when at least the power consumption of the vehicle is greater than the remaining power, the maximum driving speed and/or the peak discharge power are adjusted according to a preset speed threshold.
The higher the traveling speed of the vehicle, the greater the driving power required for the vehicle, the lower the discharge efficiency of the battery pack, and the greater the amount of power consumption of the vehicle. In addition, the vehicle may cause a large power discharge of the battery pack when the vehicle is rapidly accelerated, thereby reducing the discharge efficiency of the battery pack and also increasing the power consumption of the vehicle. Therefore, by adjusting the maximum traveling speed of the vehicle and/or the peak discharge power of the battery pack, the discharge efficiency of the battery pack of the vehicle can be improved, the power consumption of the vehicle can be reduced, and the vehicle can reach the destination. However, considering that the maximum traveling speed of the vehicle affects the driving safety and comfort of the vehicle, the adjustment of the peak discharge power of the battery pack affects the maximum traveling speed of the vehicle, and thus, the preset speed threshold value needs to be considered when the maximum traveling speed and/or the peak discharge power of the vehicle are adjusted.
In step S103, only the maximum traveling speed of the vehicle may be adjusted, only the peak discharge power of the battery pack may be adjusted, or both may be adjusted. Next, three embodiments will be described in detail.
The first implementation mode comprises the following steps: the maximum travel speed of the vehicle is adjusted only according to a preset speed threshold.
In this embodiment, as shown in fig. 2, the step S103 includes the steps of:
in step S311, a candidate maximum traveling speed is calculated from the maximum traveling speed of the vehicle and a preset speed variation amount.
Alternatively, a difference between the maximum traveling speed and a preset speed variation amount may be determined as the candidate maximum traveling speed.
It should be noted that the preset speed variation may be a default value when the vehicle leaves the factory, or may be a numerical value set by the driver as needed. Specifically, the preset speed variation may be set according to the performance and road condition information of different vehicles, for example, the preset speed variation may be set to 20 km/h. When the maximum traveling speed is 120km/h, the candidate maximum traveling speed is 100km/h at this time.
In step S312, it is determined whether the candidate maximum traveling speed is greater than or equal to a preset speed threshold.
If the candidate maximum driving speed is greater than or equal to the preset speed threshold, it may be determined that the candidate maximum speed of the vehicle does not affect the driving experience and driving safety of the vehicle, step S313 may be executed; otherwise, it may be considered that the driving experience and the driving safety of the vehicle are affected by the vehicle running at the candidate maximum speed, step S104 is executed.
In step S313, the power consumption amount of the vehicle is determined according to the target running path, the candidate maximum running speed, and the peak discharge power.
After the candidate maximum travel speed is determined, the vehicle cannot be guaranteed to reach the destination while traveling at the candidate maximum travel speed, and therefore the power consumption of the vehicle in this case also needs to be calculated.
It should be noted that, in this step, the specific process of determining the power consumption amount of the vehicle according to the target travel path, the candidate maximum travel speed, and the peak discharge power is similar to the specific process of step S102, please refer to the description of step S102, and the details are not repeated here for reducing redundancy.
In step S314, it is determined whether the power consumption amount of the vehicle is less than or equal to the remaining power amount.
If the power consumption of the vehicle is less than or equal to the remaining power, step S315 may be executed; otherwise, step S316 is performed.
In step S315, the candidate maximum traveling speed is set as a new maximum traveling speed.
If the power consumption amount of the vehicle is less than or equal to the remaining power amount at this time, it is considered that the vehicle can reach the destination while traveling at the candidate maximum traveling speed, and therefore, the candidate maximum traveling speed can be set as a new maximum traveling speed, and the vehicle can be controlled to travel at a speed not exceeding the new maximum traveling speed.
In step S316, the candidate maximum travel speed is set as a new maximum travel speed, and steps S311 to S314 are executed again until the power consumption amount of the vehicle is less than or equal to the remaining power amount.
If the calculated power consumption amount is still greater than the remaining power amount, it may be determined that the vehicle cannot reach the destination, and therefore, it is necessary to continue to decrease the maximum driving speed of the vehicle, i.e., step S311 to step S314 are performed again until the power consumption amount of the vehicle is less than or equal to the remaining power amount, at which time it may be determined that the vehicle can reach the destination.
For example, the candidate maximum traveling speed is 100km/h, which is greater than the preset speed threshold value of 50km/h, at which time the candidate maximum traveling speed of 100km/h is set as a new maximum traveling speed, and steps S311 to S314 are performed again until the power consumption amount of the vehicle is less than or equal to the remaining power amount, at which time the resulting candidate maximum traveling speed is 80km/h, and thus the new maximum traveling speed of the vehicle may be set to 80 km/h.
The values are described in terms of the maximum travel speed of the vehicle, which can be used to control the vehicle. Specifically, it is possible to control the vehicle to travel in response to an operation instruction of the driver and acquire the travel speed of the vehicle in real time during the travel of the vehicle, and control the vehicle to travel at the maximum travel speed when the travel speed of the vehicle is greater than or equal to the maximum travel speed.
Therefore, the driving power required by the vehicle can be reduced by limiting the maximum driving speed of the vehicle, the discharging efficiency of the battery pack is improved, the power consumption of the vehicle is reduced, and the driving range of the vehicle is prolonged.
The second embodiment: the peak discharge power of the battery pack is adjusted only according to a preset speed threshold.
In this embodiment, as shown in fig. 3, step S103 includes the steps of:
in step S321, a candidate peak discharge power is calculated from the peak discharge power and a preset discharge power variation.
Alternatively, a difference between the peak discharge power and a preset discharge power variation may be determined as the candidate peak discharge power.
It should be noted that the preset discharge power variation may be a default value at the time of vehicle shipment or may be a numerical value set by the driver as needed. Specifically, the preset peak variation may be set according to the performance and road condition information of different vehicles, for example, the preset discharge power variation may be set to 15 kW. When the peak discharge power is 90kW, the candidate peak discharge power at this time is 75 kW.
In step S322, a new maximum traveling speed corresponding to the candidate peak discharge power is determined based on a preset correspondence relationship between the peak discharge power and the vehicle traveling speed.
In step S323, it is determined whether the new maximum travel speed is greater than or equal to a preset speed threshold.
If the new maximum driving speed is greater than or equal to the preset speed threshold, it can be considered that the driving experience and the driving safety of the vehicle are not affected by the vehicle driving with the candidate peak discharge power, step S324 can be executed; otherwise, step S104 is executed.
In step S324, the power consumption amount of the vehicle is determined based on the target running path, the new maximum running speed, and the candidate peak discharge power.
After the candidate peak discharge power is determined, the target degree of the vehicle traveling at the candidate peak discharge power cannot be guaranteed, and therefore, the power consumption amount of the vehicle in this case also needs to be calculated.
It should be noted that, in this step, the specific process of determining the driving range of the vehicle according to the target driving path, the new maximum driving speed and the candidate peak discharge power is similar to the specific process of step S102, please refer to the description of step S102, and details are not repeated here in order to reduce redundancy.
In step S325, it is determined whether the power consumption amount of the vehicle is less than or equal to the remaining power amount.
If the power consumption of the vehicle is less than or equal to the remaining power, step S326 may be executed; otherwise, step S237 is executed.
In step S326, the candidate peak discharge power is set as a new peak discharge power.
If the power consumption amount of the vehicle is equal to or less than the remaining power amount at this time, it is considered that the vehicle can travel at the candidate peak discharge power at this time and can reach the destination, and therefore, the candidate peak discharge power can be set as a new peak discharge power, and the battery pack of the vehicle can be controlled to discharge at the new peak discharge power.
In step S327, the candidate peak discharge power is set as a new peak discharge power, and steps S321 to S325 are executed again until the power consumption amount of the vehicle is less than or equal to the remaining power amount.
If the calculated power consumption is still greater than the remaining power, it is determined that the vehicle cannot reach the destination, and therefore, it is necessary to continue to decrease the peak discharge power of the battery pack, that is, to use the candidate peak discharge power as a new peak discharge power, and to perform steps S321 to S325 again until the power consumption of the vehicle is less than or equal to the remaining power, at which time it is determined that the vehicle can reach the destination.
For example, the driving range is 70km, which is less than the target driving range by 90km, at which time 75kW of the candidate peak discharge power is set as a new maximum peak discharge power, and steps S321 to S325 are performed again until the power consumption amount of the vehicle is less than or equal to the remaining power amount, at which time the resulting candidate peak discharge power is 60kW, so that the new discharge power of the battery pack may be set to 60 kW.
It is noted that, after the peak discharge power of the battery pack is determined, the battery pack of the vehicle may be controlled based on the peak discharge power. Specifically, the vehicle may be controlled to run in response to an operation instruction of the driver and the discharge power of the battery pack may be acquired in real time during the running of the vehicle, and the battery pack may be controlled to discharge at the peak discharge power when the discharge power of the battery pack is greater than or equal to the peak discharge power.
Therefore, the problem of high-power discharge of the battery pack caused by rapid acceleration of the vehicle can be solved by limiting the peak discharge power of the battery pack, so that the discharge efficiency of the battery pack is improved, and the power consumption of the vehicle is reduced, so that the vehicle can reach a destination.
The third embodiment is as follows: the maximum traveling speed of the vehicle and the peak discharge power of the battery pack are adjusted at the same time.
In this embodiment, as shown in fig. 4, the step S103 includes the steps of:
in step S331, a candidate peak discharge power is calculated based on the peak discharge power and a preset discharge power variation.
In step S332, a new maximum traveling speed corresponding to the candidate peak discharge power is determined based on a preset correspondence relationship between the peak discharge power and the vehicle traveling speed.
In step S333, a candidate maximum travel speed is calculated from the new maximum travel speed and the preset speed variation amount.
Alternatively, a difference between the maximum traveling speed and the preset speed variation may be determined as a candidate maximum traveling speed, and a difference between the peak discharge power and the preset discharge power variation may be determined as a candidate peak discharge power.
For example, if the maximum driving speed is 120km/h and the preset speed variation is 20km/h, the candidate maximum driving speed is 100 km/h; if the peak discharge power is 90kW and the preset discharge power variation is 15kW, the candidate peak discharge power is 75 kW.
In step S334, it is determined whether the candidate maximum travel speed is greater than or equal to a preset speed threshold.
If the candidate maximum driving speed is greater than or equal to the preset speed threshold, executing step S335; otherwise, step S104 is executed.
In step S335, the power consumption amount of the vehicle is determined according to the target running path, the candidate maximum running speed, and the candidate peak discharge power.
In this step, the specific process of determining the power consumption amount of the vehicle according to the target travel path, the candidate maximum travel speed, and the candidate peak discharge power is similar to the specific process of step S102, please refer to the description of step S102, and details are not repeated here in order to reduce redundancy.
In step S336, it is determined whether the power consumption of the vehicle is less than or equal to the remaining power.
If the power consumption of the vehicle is less than or equal to the remaining power, executing step S337; otherwise, step S338 is performed.
In step S337, the candidate maximum traveling speed is set as a new maximum traveling speed, and the candidate peak discharge power is set as a new peak discharge power.
In step S338, the candidate maximum travel speed is set as a new maximum travel speed, and the candidate peak discharge power is set as a new peak discharge power, and steps S331 to S336 are executed again until the power consumption amount of the vehicle is less than or equal to the remaining power amount.
For example, the candidate maximum driving speed is 100km/h, which is greater than the preset speed by 50km/h, at which time, the candidate maximum driving speed of 100km/h is set as a new maximum driving speed, and steps S331 to S336 are performed again until the vehicle mileage is greater than or equal to the target mileage, at which time, the candidate maximum driving speed is 60km/h, the candidate peak discharge power is 50kW, and thus the new maximum driving speed of the vehicle may be set to 60km/h, and the new discharge power of the battery pack may be set to 50 kW.
It is worth mentioning that after determining the maximum traveling speed of the vehicle and the peak discharge power of the battery pack, the vehicle may be controlled based on the maximum traveling speed and the peak discharge power. Specifically, it is possible to control the vehicle to travel in response to an operation instruction of the driver and acquire a travel speed of the vehicle and a discharge power of the battery pack in real time during the travel of the vehicle, control the vehicle to travel at the maximum travel speed when the travel speed of the vehicle is greater than or equal to the maximum travel speed, and control the battery pack to discharge at the peak discharge power when the discharge power of the battery pack is greater than or equal to the peak discharge power.
In this way, the driving power required by the vehicle can be reduced by limiting the maximum driving speed of the vehicle, the problem of high-power discharge of the battery pack caused by rapid acceleration of the vehicle can be avoided by limiting the peak discharge power of the battery pack, the discharge efficiency of the battery pack can be improved, and the power consumption of the vehicle can be reduced, so that the vehicle can reach the destination.
With respect to the above embodiment, in the process of setting the maximum driving speed of the vehicle, after each calculation of the candidate maximum driving speed according to the maximum driving speed and the preset speed variation, if the candidate maximum driving speed is less than or equal to the preset speed threshold, the maximum driving speed cannot be further reduced, and accordingly, as shown in fig. 2 to 4, the method further includes:
if the candidate maximum driving speed is less than the preset speed threshold, executing step S104, namely acquiring road condition information in front of the vehicle and determining a new target driving path according to the road condition information; and/or acquiring charging pile information in a preset area of the vehicle, and outputting prompt information according to the charging pile information.
For example, the candidate maximum driving speed of 80km/h enables the vehicle to reach the destination, and the preset speed threshold is 90km/h, at this time, the human-computer interaction module of the vehicle may acquire road condition information in front of the vehicle and determine a new target driving path according to the road condition information, so that the vehicle drives to reach the destination according to the new target driving path. The charging pile information in a preset area of the vehicle (for example, an area with the vehicle as a circle center and a fixed distance as a radius) can be acquired through a human-computer interaction module of the vehicle, and prompt information for indicating charging of the battery pack is output and used for indicating a user to charge the vehicle according to the charging pile information. Wherein, the prompt message can include the position of charging pile, occupation state information and other information.
It is worth mentioning that the form of the prompt message may include, but is not limited to: characters, sound, vibration, and any combination of two or three of them.
In one embodiment of the present disclosure, for the above step S103, if the target driving path includes a highway section and a non-highway section, the lowest speed limit value of the highway section may be acquired. For non-high speed road sections, the maximum driving speed and/or the peak discharge power can be adjusted according to a preset speed threshold; in the high-speed road section, the lowest speed limit value of the high-speed road section can be used as a new preset speed threshold value, and the maximum driving speed and/or the peak discharge power can be adjusted according to the new preset speed threshold value.
It should be noted that, even in the non-high speed road section, the maximum driving speed of the vehicle and/or the peak discharge power of the battery pack may be adjusted only in a part of the non-high speed road section, so that the vehicle can reach the destination to meet the driving demand of the driver.
In another embodiment, for the above step S103, when the power consumption amount of the vehicle is greater than the remaining power amount, a prompt message for instructing to adjust the maximum driving speed and/or the peak discharge power may be output, and when a request instruction for instructing to adjust the maximum driving speed and/or the peak discharge power is received, the maximum driving speed and/or the peak discharge power may be adjusted.
For example, when the power consumption of the vehicle is greater than the remaining power, a prompt message may be output by the human-machine interaction module of the vehicle to enable the driver to determine whether to adjust the maximum driving speed of the vehicle and/or the peak discharge power of the battery pack and wait for receiving an instruction signal of the driver. When the human-machine interaction module receives a request instruction, which is input by a driver and indicates that the maximum driving speed and/or the peak discharge power are/is adjusted, the maximum driving speed and the peak discharge power can be adjusted according to any one of the embodiments described in fig. 2 to 3. By adopting a man-machine interaction mode, the conversation function between the driver and the vehicle is realized.
The present disclosure also provides a vehicle control system, as shown in fig. 5, the vehicle control system 500 includes a navigation module 501, a power management module 502, and a vehicle control unit 503.
The navigation module 501 is configured to obtain driving information of a vehicle, where the driving information includes a preset speed threshold, a maximum driving speed, and a target driving path of the vehicle.
Specifically, the navigation module 501 is provided with a GPS positioning unit therein, acquires the current position of the vehicle by satellite positioning, queries road condition information between the current position of the vehicle and a destination using an online map, and plans at least one driving path according to the road condition information, and a driver can select one of the driving paths as a target driving path.
The maximum traveling speed of the vehicle may be set in advance (for example, a default value at the time of shipment of the vehicle or a numerical value set by the driver as needed), or may be a maximum traveling speed reached by the vehicle during a period from the departure time to the current time, which is acquired by a speed sensor built in the navigation module 501.
It should be noted that the preset speed threshold may be a default value or a value set by the driver as needed. In addition, the minimum driving speed requirement of the vehicle on certain road sections can be considered, and the minimum driving speed requirement can be determined according to the target driving path. For example, the target driving path includes a high speed section, and if the speed limit of the high speed section is 90km/h, the preset speed threshold value can be set to 90 km/h.
The power management module 502 is used to obtain battery information of the vehicle, including the remaining amount of battery and the peak discharge power of the battery pack.
Specifically, the power management module 502 may include a battery sensor, a temperature sensor, and the like, where the battery sensor may acquire SOC (State of Charge) and SOH (State of Health) information of the battery pack, and the temperature sensor may acquire temperature information of the battery pack, and calculate the remaining power of the battery pack corresponding to the currently acquired SOC, SOH, and temperature information through a preset corresponding relationship between the information and the remaining power of the battery pack.
The vehicle control unit 503 is respectively connected with the navigation module 501 and the power management module 502, and is configured to determine the power consumption of the vehicle according to the target driving path, the maximum driving speed, and the peak discharge power; and when the power consumption of the vehicle is at least larger than the residual power, adjusting the maximum running speed and/or the peak discharge power of the vehicle according to a preset speed threshold value.
Specifically, the connection between the vehicle control unit 503 and the navigation module 501 and the power management module 502 may include, but is not limited to, a connection via a vehicle bus (e.g., CAN bus).
In one embodiment, the vehicle controller 503 is configured to calculate a candidate maximum driving speed according to the maximum driving speed and a preset speed variation; when the candidate maximum driving speed is larger than or equal to the preset speed threshold value, determining the power consumption of the vehicle according to the target driving path, the candidate maximum driving speed and the peak discharge power;
when the power consumption amount of the vehicle is less than or equal to the remaining power amount, the candidate maximum travel speed is taken as a new maximum travel speed.
And when the power consumption amount of the vehicle is greater than the remaining capacity, setting the candidate maximum driving speed as a new maximum driving speed, and performing the step of calculating the candidate maximum driving speed according to the maximum driving speed and the preset speed variation to determine the power consumption amount of the vehicle according to the target driving path, the candidate maximum driving speed and the peak discharge power again until the power consumption amount of the vehicle is less than or equal to the remaining capacity.
In one embodiment, the vehicle controller 503 is configured to calculate a candidate peak discharge power according to the peak discharge power and a preset discharge power variation; determining a new maximum driving speed corresponding to the candidate peak discharge power according to a preset corresponding relation between the peak discharge power and the maximum driving speed of the vehicle; when the new maximum driving speed is larger than or equal to a preset speed threshold value, determining the power consumption of the vehicle according to the target driving path, the new maximum driving speed and the candidate peak discharge power;
and when the power consumption of the vehicle is less than or equal to the residual power, taking the candidate peak discharge power as a new peak discharge power.
And when the power consumption of the vehicle is greater than the residual capacity, taking the candidate peak discharge power as a new peak discharge power, and executing the step of calculating the candidate peak discharge power according to the peak discharge power and the preset discharge power variation until the power consumption of the vehicle is determined according to the target running path, the new maximum running speed and the candidate peak discharge power again until the power consumption of the vehicle is less than or equal to the residual capacity.
In one embodiment, the vehicle control unit 503 is configured to obtain a lowest speed limit value of the highway section when the target driving path includes the highway section and the non-highway section; on a non-high speed road section, adjusting the maximum driving speed and/or the peak discharge power according to a preset speed threshold; and in the high-speed road section, taking the lowest speed limit value as a new preset speed threshold value, and adjusting the maximum driving speed and/or the peak discharge power according to the new preset speed threshold value.
In another embodiment, the vehicle control system 500 further includes a human-computer interaction module 504, where the human-computer interaction module 504 is connected to the vehicle controller 503, and when the power consumption of the vehicle is greater than the remaining power, the vehicle controller 503 sends a control signal to the human-computer interaction module 504;
the human-computer interaction module 504 is used for responding to the control signal and outputting prompt information for indicating adjustment of the maximum driving speed and/or the peak discharge power; upon receiving a request instruction for instructing adjustment of the maximum traveling speed and/or the peak discharge power, instruction information is transmitted to the vehicle control unit 503.
Vehicle control unit 503 is also configured to adjust the maximum travel speed and/or peak discharge power in response to the indication.
Illustratively, when the power consumption amount of the vehicle is greater than the remaining power amount, the controller 503 transmits a control signal to the human-machine interaction module 504, and the human-machine interaction module 504 outputs prompt information in response to the control signal transmitted by the controller 503, so that the driver determines whether to adjust the maximum driving speed of the vehicle and/or the peak discharge power of the battery pack. The human-machine interaction module 504 transmits instruction information to the vehicle controller 503 when receiving a request instruction for instructing adjustment of the maximum driving speed and/or the peak discharge power, which is input by a driver. The vehicle control unit 503 adjusts the maximum driving speed and/or the peak discharge power in response to the indication information sent by the human-computer interaction module 504. The human-computer interaction module 504 may be connected to the vehicle control unit 503 through a CAN bus, and the form of the indication information may include, but is not limited to: characters, sound, vibration, any combination of two or three of them, and the like.
With regard to the system in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
By adopting the vehicle control system, when the residual electric quantity of the vehicle battery pack cannot make the vehicle reach the destination, the maximum driving speed of the vehicle and/or the peak discharge power of the battery pack are/is adjusted, so that the discharge efficiency of the battery pack can be improved, the power consumption of the vehicle is reduced, and the vehicle can reach the destination.
The present disclosure further provides a vehicle including the vehicle control system according to any one of the above embodiments, which is not described herein again.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A vehicle control method characterized by comprising:
acquiring running information and battery information of a vehicle, wherein the running information comprises a preset speed threshold value, a maximum running speed and a target running path of the vehicle, and the battery information comprises residual electric quantity and peak discharge power of a battery pack of the vehicle;
determining the power consumption of the vehicle according to the target running path, the maximum running speed and the peak discharge power;
and when the power consumption of the vehicle is at least larger than the residual power, adjusting the maximum running speed and/or the peak discharge power according to the preset speed threshold.
2. The method of claim 1, wherein said adjusting said maximum travel speed according to said preset speed threshold comprises:
calculating a candidate maximum driving speed according to the maximum driving speed and a preset speed variation;
if the candidate maximum driving speed is larger than or equal to the preset speed threshold value, determining the power consumption of the vehicle according to the target driving path, the candidate maximum driving speed and the peak discharge power;
and if the power consumption of the vehicle is less than or equal to the residual power, taking the candidate maximum driving speed as a new maximum driving speed.
3. The method of claim 2, wherein said adjusting said maximum travel speed according to said preset speed threshold further comprises:
and if the power consumption of the vehicle is greater than the residual power, taking the candidate maximum driving speed as a new maximum driving speed, and executing the step of calculating the candidate maximum driving speed according to the maximum driving speed and a preset speed variation to determine the power consumption of the vehicle according to the target driving path, the candidate maximum driving speed and the peak discharge power again until the power consumption of the vehicle is less than or equal to the residual power.
4. The method of claim 2, further comprising:
if the candidate maximum driving speed is smaller than the preset speed threshold, executing the following operations:
acquiring road condition information in front of the vehicle and determining a new target driving path according to the road condition information; and/or
And acquiring charging pile information in a preset area of the vehicle, and outputting prompt information according to the charging pile information.
5. The method of claim 1, wherein said adjusting said peak discharge power according to said preset speed threshold comprises:
calculating candidate peak discharge power according to the peak discharge power and a preset discharge power variation;
determining a new maximum driving speed corresponding to the candidate peak discharge power according to a preset corresponding relation between the peak discharge power and the maximum driving speed of the vehicle;
if the new maximum driving speed is larger than or equal to the preset speed threshold value, determining the power consumption of the vehicle according to the target driving path, the new maximum driving speed and the candidate peak discharge power;
and if the power consumption of the vehicle is less than or equal to the residual power, taking the candidate peak discharge power as a new peak discharge power.
6. The method of claim 5, wherein said adjusting said peak discharge power according to said preset speed threshold further comprises:
and if the power consumption of the vehicle is greater than the residual power, taking the candidate peak discharge power as a new peak discharge power, and executing the step of calculating the candidate peak discharge power according to the peak discharge power and a preset discharge power variation to determine the power consumption of the vehicle according to the target running path, the new maximum running speed and the candidate peak discharge power again until the power consumption of the vehicle is less than or equal to the residual power.
7. The method according to any one of claims 1 to 6, wherein said adjusting said maximum driving speed and/or said peak discharge power according to said preset speed threshold comprises:
if the target driving path comprises a high-speed road section and a non-high-speed road section, acquiring the lowest speed limit value of the high-speed road section;
on the non-high-speed road section, adjusting the maximum driving speed and/or the peak discharge power according to the preset speed threshold;
and in the high-speed road section, taking the lowest speed limit value as a new preset speed threshold value, and adjusting the maximum driving speed and/or the peak discharge power according to the new preset speed threshold value.
8. The method according to any one of claims 1 to 6, wherein the adjusting the maximum driving speed and/or the peak discharge power according to the preset speed threshold when at least the power consumption of the vehicle is greater than the remaining power comprises:
when the power consumption of the vehicle is greater than the residual power, outputting prompt information for indicating adjustment of the maximum driving speed and/or the peak discharge power;
adjusting the maximum driving speed and/or the peak discharge power upon receiving a request instruction for instructing adjustment of the maximum driving speed and/or the peak discharge power.
9. A vehicle control system, characterized by comprising:
the navigation module is used for acquiring the running information of a vehicle, and the running information comprises a preset speed threshold value, a maximum running speed and a target running path of the vehicle;
the power supply management module is used for acquiring battery information of the vehicle, wherein the battery information comprises the residual electric quantity and the peak discharge power of a battery pack of the vehicle;
the vehicle control unit is respectively connected with the navigation module and the power management module and is used for determining the power consumption of the vehicle according to the target running path, the maximum running speed and the peak discharge power; and when the power consumption of the vehicle is at least larger than the residual power, adjusting the maximum running speed of the vehicle and/or the peak discharge power according to the preset speed threshold.
10. A vehicle characterized by comprising the vehicle control system of claim 9.
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