CN114684143B - Electric vehicle and power-limited control method and system thereof - Google Patents
Electric vehicle and power-limited control method and system thereof Download PDFInfo
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- CN114684143B CN114684143B CN202011582738.5A CN202011582738A CN114684143B CN 114684143 B CN114684143 B CN 114684143B CN 202011582738 A CN202011582738 A CN 202011582738A CN 114684143 B CN114684143 B CN 114684143B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
- B60Q1/54—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking for indicating speed outside of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
- B60W40/06—Road conditions
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Abstract
The application discloses an electric vehicle and a power limited control method and a power limited control system thereof, wherein the power limited control method of the electric vehicle comprises the following steps: when the electric vehicle runs on a road with low speed limitation, acquiring the lowest speed limit of the current road, and acquiring gradient information of the current road; obtaining the current maximum discharge power of a power battery, obtaining the current maximum driving power of a motor, and obtaining the current consumption power of a high-voltage accessory of an electric vehicle; calculating the current highest running speed of the electric vehicle according to the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessories; and when the current highest running speed of the electric vehicle is smaller than the lowest speed limit of the current road, controlling the out-vehicle prompting device to send out low-speed running prompting information. According to the electric vehicle power limited control method provided by the embodiment of the application, personal license deduction and fine caused by non-human factors of a driver can be avoided.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to an electric vehicle and a power limiting control method and system thereof.
Background
The motor output power of an electric vehicle is limited by various factors, such as battery power, battery temperature, motor system temperature and some faults of the whole vehicle, which are not resistant and are not human factors.
For example, when the battery power is low, the speed of the vehicle cannot reach a high value because the battery power is limited, if the vehicle runs on an expressway at this time, the expressway is provided with a minimum running speed of 60km/h in some sections, the power of the vehicle is limited at this time, the vehicle speed cannot reach the minimum value of the traffic regulation, and the vehicle cannot be photographed by monitoring facilities such as an electronic eye to carry out penalty and deduction processing, but the vehicle is not an artificial factor of a driver.
However, the traffic regulation facility cannot recognize whether the cause of the vehicle or the human factor causes the driving vehicle not to travel in accordance with the traffic regulation, nor can the driver calculate in real time whether the dynamics of the own vehicle satisfies the vehicle speed minimum value of the traffic regulation.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides the electric vehicle power limited control method, so that the traffic department can acquire the real state of the vehicle conveniently, personal license deduction and fine caused by non-human factors of a driver can be avoided, the traffic department can reasonably process the involved vehicles, convenience and rationality of traffic control can be improved, and time cost is saved.
The present application is directed to a computer readable storage medium embodying the above method, to an electric vehicle implementing the above method, and to an electric vehicle power limited control system.
The electric vehicle power limited control method according to the embodiment of the application comprises the following steps: when the electric vehicle runs on a road with low speed limitation, acquiring the lowest speed limit of the current road, and acquiring gradient information of the current road; obtaining the current maximum discharge power of a power battery, obtaining the current maximum driving power of a motor, and obtaining the current consumption power of a high-voltage accessory of the electric vehicle; calculating a current highest running speed of the electric vehicle according to the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessory; and when the current highest running speed of the electric vehicle is smaller than the lowest speed limit of the current road, controlling the out-vehicle prompting device to send out low-speed running prompting information.
According to the electric vehicle power limited control method, the current highest running speed of the electric vehicle is calculated through gradient information of a current road, the current maximum discharge power of a power battery, the current maximum driving power of a motor and the current consumption power of a high-voltage accessory, and when the current highest running speed of the electric vehicle is smaller than the lowest speed limit of the current road, the off-vehicle prompt device is controlled to send out low-speed running prompt information. Therefore, the traffic department can conveniently acquire the real state of the vehicle, personal license deduction and fine caused by non-human factors of the driver can be avoided, and the traffic department can reasonably process the involved vehicles, so that the convenience and rationality of traffic control can be improved, and the time cost is saved.
In some embodiments, calculating the current highest operating speed of the electric vehicle based on the grade information of the current road, the current maximum discharge power of the power battery, the current maximum drive power of the motor, and the current consumption power of the high voltage accessory includes: calculating available power according to the current maximum discharge power of the power battery and the current consumption power of the high-voltage accessory, and determining actual driving available power according to the available power and the current maximum driving power of the motor; and calculating the current highest running speed of the electric vehicle according to the actual driving available power and the gradient information of the current road.
Specifically, the current highest running speed of the electric vehicle is calculated according to the following formula:
P drive is available ＝[m*g*f*cos(a)+m*g*sin(a)+Cd*A*Vmax*Vmax/21.15]*Vmax，
Wherein P is Drive is available And for the actual driving available power, m is the full load mass value of the electric vehicle, g is 9.8, cd is the air resistance coefficient of the electric vehicle, a is the gradient of the current road, A is the windward area of the electric vehicle, f is the rolling resistance coefficient, and Vmax is the current highest running speed of the electric vehicle.
In some alternative embodiments, determining the actual drive available power from the available power and the current maximum drive power of the motor includes: and performing small value calculation on the available power and the current maximum driving power of the motor to determine the actual driving available power.
In some embodiments, obtaining the lowest speed limit for the current link includes: information interaction is carried out through an ADAS system and a navigation system so as to obtain the lowest speed limit of the current road; or acquiring roadside speed limit traffic sign information through the vehicle-mounted camera to acquire the lowest speed limit of the current road.
In some alternative embodiments, when the off-board prompt device is controlled to send out the low-speed driving prompt information, the current highest running speed of the electric vehicle is also sent to a traffic management platform.
In some alternative embodiments, the off-board warning device is a warning light disposed on the roof of the vehicle.
A computer-readable storage medium according to an embodiment of the present application has stored thereon an electric vehicle power limitation control program that, when executed by a processor, implements the electric vehicle power limitation control method according to any one of the above-described embodiments of the present application.
According to the computer readable storage medium provided by the embodiment of the application, the traffic department can acquire the real state of the vehicle, so that personal license deduction and fine caused by non-human factors of a driver can be avoided, the traffic department can reasonably process the involved vehicles, the convenience and rationality of traffic control can be improved, and the time cost is saved.
The electric vehicle according to the embodiment of the application comprises a memory, a processor and an electric vehicle power limiting control program stored on the memory and capable of running on the processor, wherein the processor realizes the electric vehicle power limiting control method according to any one of the above embodiments of the application when executing the electric vehicle power limiting control program.
According to the electric vehicle provided by the embodiment of the application, the current highest running speed of the electric vehicle is calculated through the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessory, and when the current highest running speed of the electric vehicle is smaller than the lowest speed limit of the current road, the off-vehicle prompt device is controlled to send out low-speed running prompt information. Therefore, the traffic department can conveniently acquire the real state of the vehicle, personal license deduction and fine caused by non-human factors of the driver can be avoided, and the traffic department can reasonably process the involved vehicles, so that the convenience and rationality of traffic control can be improved, and the time cost is saved.
An electric vehicle power limited control system according to an embodiment of the application includes: the battery manager is used for detecting the current maximum discharge power of the power battery; a motor controller for detecting a current maximum driving power of the motor; a body stabilization system controller for detecting gradient information of a current road; the intelligent auxiliary driving system controller is used for acquiring the lowest speed limit of the current road; an off-board prompting device; the vehicle control device comprises a battery manager, a motor controller, a vehicle body stabilizing system controller, an intelligent auxiliary driving system controller and an external vehicle prompting device, wherein the vehicle controller is respectively connected with the battery manager, the motor controller, the vehicle body stabilizing system controller, the intelligent auxiliary driving system controller and the external vehicle prompting device, and is used for acquiring current consumption power of a high-voltage accessory of an electric vehicle when the electric vehicle runs on a road with limited low speed, calculating current highest running speed of the electric vehicle according to gradient information of the current road, current maximum discharge power of a power battery, current maximum driving power of a motor and current consumption power of the high-voltage accessory, and controlling the external vehicle prompting device to send low-speed running prompting information when the current highest running speed of the electric vehicle is smaller than the lowest speed limit of the current road.
According to the electric vehicle power limited control system provided by the embodiment of the application, the current highest running speed of the electric vehicle is calculated through the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessory, and when the current highest running speed of the electric vehicle is smaller than the lowest speed limit of the current road, the off-vehicle prompt device is controlled to send out low-speed running prompt information. Therefore, the traffic department can conveniently acquire the real state of the vehicle, personal license deduction and fine caused by non-human factors of the driver can be avoided, and the traffic department can reasonably process the involved vehicles, so that the convenience and rationality of traffic control can be improved, and the time cost is saved. In addition, the highest vehicle speed capability is calculated by the whole vehicle controller, so that a driver can be prevented from privately lighting the warning lamp, and the machine is smart.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of a method of power limited control of an electric vehicle in an embodiment of the application;
FIG. 2 is a schematic diagram of an electric vehicle and a traffic detection device according to an embodiment of the present application;
fig. 3 is a block diagram illustrating a method for controlling power limitation of an electric vehicle according to an embodiment of the present application.
Reference numerals:
an electric vehicle 1000,
Battery manager 100, motor controller 200, body stabilization system controller 300, intelligent driving support system controller 400, off-board presentation device 500, whole vehicle controller 600, high voltage accessory 700,
Traffic detection device 2000.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
A method of electric vehicle power limited control according to an embodiment of the application is described below with reference to fig. 1-2.
The electric vehicle power limited control method according to the embodiment of the application comprises the following steps:
s11, when the electric vehicle 1000 runs on a road with limited low speed, acquiring the lowest speed limit of the current road, and acquiring gradient information of the current road;
s12, acquiring the current maximum discharge power of the power battery, acquiring the current maximum driving power of the motor and acquiring the current consumption power of the high-voltage accessory of the electric vehicle 1000;
s13, calculating the current highest running speed of the electric vehicle 1000 according to the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessories;
s14, when the current highest running speed of the electric vehicle 1000 is less than the lowest speed limit of the current road, the off-vehicle presentation device 500 is controlled to issue a low-speed running presentation message.
It can be appreciated that the application provides a power-limited control method for an electric vehicle, which mainly solves the problem that the vehicle cannot meet the urban expressway or the minimum running speed required by high speed due to non-human factors, and the penalty is deducted.
For example, the electric vehicle 1000 may intelligently calculate the highest running speed that the vehicle can reach on the low-speed limited road, and when the highest speed value of the vehicle calculated by the vehicle is smaller than the lowest speed limit of the current road, that is, the traffic regulation is not satisfied, the off-board prompt device 500 sends out low-speed running prompt information, which indicates that the current form condition is caused by the driving capability of the vehicle, so that the traffic detection device 2000 such as the traffic electronic eye can use the off-board prompt device 500 to penalize the vehicle, which can avoid embarrassment of violating the traffic regulation caused by non-human factors of the driver, avoid the license deduction and penalty of the driver, and be convenient for the traffic department to obtain the real state of the vehicle, and reasonably process the involved vehicle.
In addition, the off-vehicle prompt device sends out the low-speed driving prompt information when the current highest running speed of the electric vehicle 1000 is smaller than the lowest speed limit of the current road, so that the driver can be prevented from privately lighting the warning lamp, and the traffic control is facilitated.
Therefore, the problem that the speed of the electric vehicle does not meet the requirements of traffic regulations due to non-human factors of the electric vehicle on the market at present is solved; whether the irregular driving behavior of the vehicle is an artificial factor or a vehicle factor is more reasonable and safer.
According to the electric vehicle power limited control method of the embodiment of the application, the current highest running speed of the electric vehicle 1000 is calculated through the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessory, and when the current highest running speed of the electric vehicle 1000 is smaller than the lowest speed limit of the current road, the off-vehicle prompt device 500 is controlled to send out low-speed running prompt information. Therefore, the traffic department can conveniently acquire the real state of the vehicle, personal license deduction and fine caused by non-human factors of the driver can be avoided, and the traffic department can reasonably process the involved vehicles, so that the convenience and rationality of traffic control can be improved, and the time cost is saved.
In some embodiments, calculating the current highest operating speed of the electric vehicle 1000 based on the grade information of the current road, the current maximum discharge power of the power battery, the current maximum drive power of the motor, and the current consumption power of the high voltage accessories includes: calculating available power according to the current maximum discharge power of the power battery and the current consumption power of the high-voltage accessory, and determining actual driving available power according to the available power and the current maximum driving power of the motor; the current highest running speed of the electric vehicle 1000 is calculated based on the actual drive available power and the gradient information of the current road. Therefore, the available power is calculated through the current maximum discharge power of the power battery and the current consumption power of the high-voltage accessory, and the power which can be used for driving the whole vehicle from the battery level can be calculated. The available power of actual driving is determined by the available power and the current maximum driving power of the motor, and the actual power value which can be used for driving the whole vehicle can be determined after the comprehensive battery and the motor system of the whole vehicle are determined. Thereby, the method is used for the treatment of the heart disease. The calculated highest running speed can be more real and accurate.
Specifically, the current highest running speed of the electric vehicle 1000 is calculated according to the following formula:
P drive is available ＝[m*g*f*cos(a)+m*g*sin(a)+Cd*A*Vmax*Vmax/21.15]*Vmax，
Wherein P is Drive is available For actually driving the available power, m is the full-load mass value of the whole electric vehicle 1000, g is 9.8, cd is the air resistance coefficient of the electric vehicle 1000, a is the gradient of the current road, a is the windward area of the electric vehicle 1000, f is the rolling resistance coefficient, and Vmax is the current highest running speed of the electric vehicle 1000. Thus, the highest vehicle speed value that can be achieved by the vehicle in the current state can be obtained.
The wind tunnel test is carried out on the vehicle before mass production, the value of the rolling resistance coefficient can be a numerical value changed according to the vehicle speed, or a fixed value can be taken, and the vehicle can be tested before delivery.
In some alternative embodiments, determining the actual drive available power from the available power and the current maximum drive power of the motor includes: the available power and the current maximum driving power of the motor are subjected to small value calculation to determine the actual driving available power. It will be appreciated that, in some cases, the battery outputs sufficient driving power, and the motor system may also reduce the power output due to overheating of the motor or failure of the motor system itself, so that the power value for driving may be obtained more truly and accurately by performing a small-value calculation on the available power and the current maximum driving power of the motor to determine the actual driving available power.
In some embodiments, obtaining the lowest speed limit for the current link includes: information interaction is carried out through an ADAS system and a navigation system so as to obtain the minimum speed limit of the current road; or acquiring roadside speed limit traffic sign information through the vehicle-mounted camera to acquire the lowest speed limit of the current road. Thus, the minimum speed limit of the current road can be obtained in real time, and a real and reliable minimum vehicle speed requirement value can be obtained.
In some alternative embodiments, the current highest operating speed of the electric vehicle 1000 is also sent to the traffic management platform when the off-board reminder 500 is controlled to send a low-speed travel reminder. Therefore, traffic departments can acquire the real state of the vehicle conveniently, the traffic management platform can record information in real time, and the traffic departments can reasonably process the involved vehicles, so that convenience and rationality of traffic control can be improved, and time cost is saved.
In some alternative embodiments, the off-board cue device 500 is a cue light disposed on the roof of the vehicle. The traffic detection device 2000 is thus used to alert itself that the vehicle speed is not satisfactory due to non-human factors.
Alternatively, the indicator light may be red, awake, of a larger wavelength, of a longer propagation distance, and may be of a form uniformly prescribed by the transportation department, although the indicator light may be yellow or of another color, and the specific form of the indicator light is not limited herein.
A computer-readable storage medium according to an embodiment of the present application has stored thereon an electric vehicle 1000 power-limited control program that, when executed by a processor, implements the electric vehicle power-limited control method according to any one of the above-described embodiments of the present application.
According to the computer readable storage medium provided by the embodiment of the application, the traffic department can acquire the real state of the vehicle, so that personal license deduction and fine caused by non-human factors of a driver can be avoided, the traffic department can reasonably process the involved vehicles, the convenience and rationality of traffic control can be improved, and the time cost is saved.
The electric vehicle 1000 according to the embodiment of the application includes a memory, a processor, and an electric vehicle 1000 power-limited control program stored on the memory and operable on the processor, and when the processor executes the electric vehicle 1000 power-limited control program, the electric vehicle power-limited control method according to any one of the above embodiments of the application is implemented.
According to the electric vehicle 1000 of the embodiment of the application, the current highest running speed of the electric vehicle 1000 is calculated through the gradient information of the current road, the current maximum discharging power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessory, and when the current highest running speed of the electric vehicle 1000 is smaller than the lowest speed limit of the current road, the off-vehicle prompt device 500 is controlled to send out the low-speed running prompt information. Therefore, the traffic department can conveniently acquire the real state of the vehicle, personal license deduction and fine caused by non-human factors of the driver can be avoided, and the traffic department can reasonably process the involved vehicles, so that the convenience and rationality of traffic control can be improved, and the time cost is saved.
An electric vehicle power limited control system according to an embodiment of the application, as shown in fig. 3, includes: battery manager 100, motor controller 200, body stabilization system controller 300, intelligent assisted driving system controller 400, off-vehicle presentation device 500, and vehicle controller 600. The battery manager 100 is used to detect the current maximum discharge power of the power battery, the motor controller 200 is used to detect the current maximum driving power of the motor, and the body stabilization system controller 300 is used to detect gradient information of the current road. The intelligent driving assistance system controller 400 is used to obtain the lowest speed limit of the current road. The whole vehicle controller 600 is respectively connected with the battery manager 100, the motor controller 200, the vehicle body stabilization system controller 300, the intelligent driving support system controller 400 and the vehicle exterior prompting device 500, and the whole vehicle controller 600 is used for acquiring the current consumption power of the high-voltage accessory 700 of the electric vehicle 1000 when the electric vehicle 1000 runs on a road with limited low speed, calculating the current highest running speed of the electric vehicle 1000 according to the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessory 700, and controlling the vehicle exterior prompting device 500 to send out low-speed running prompting information when the current highest running speed of the electric vehicle 1000 is smaller than the lowest speed limit of the current road.
According to the electric vehicle power limited control system of the embodiment of the application, the current highest running speed of the electric vehicle 1000 is calculated through the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessory, and the off-vehicle prompt device 500 is controlled to send out the low-speed running prompt information when the current highest running speed of the electric vehicle 1000 is smaller than the lowest speed limit of the current road. Therefore, the traffic department can conveniently acquire the real state of the vehicle, personal license deduction and fine caused by non-human factors of the driver can be avoided, and the traffic department can reasonably process the involved vehicles, so that the convenience and rationality of traffic control can be improved, and the time cost is saved. In addition, the vehicle controller 600 is utilized to calculate the highest vehicle speed, so that the driver can be prevented from privately lighting the warning light, and the vehicle is smart.
Alternatively, the high-voltage accessory 700 may include a dc converter, an air conditioner compressor, and a PTC heating system, which all consume the electric energy of the battery system, and report the electric energy to the vehicle controller 600 in real time through can signals.
Optionally, the information interaction is performed between the whole vehicle controller 600 and the battery manager 100, the motor controller 200, the vehicle body stabilization system controller 300 and the intelligent auxiliary driving system controller 400 through can lines.
Alternatively, the whole vehicle controller 600 is connected with the external prompt device 500 by a hard wire, and the whole vehicle controller 600 directly controls driving to turn on and off the indicator light.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A method of power limited control of an electric vehicle, comprising:
when the electric vehicle runs on a road with low speed limitation, acquiring the lowest speed limit of the current road, and acquiring gradient information of the current road;
obtaining the current maximum discharge power of a power battery, obtaining the current maximum driving power of a motor, and obtaining the current consumption power of a high-voltage accessory of the electric vehicle;
calculating a current highest running speed of the electric vehicle according to the gradient information of the current road, the current maximum discharge power of the power battery, the current maximum driving power of the motor and the current consumption power of the high-voltage accessory;
and when the current highest running speed of the electric vehicle is smaller than the lowest speed limit of the current road, controlling the out-vehicle prompting device to send out low-speed running prompting information.
2. The electric vehicle power limited control method according to claim 1, characterized in that calculating a current highest running speed of the electric vehicle based on gradient information of the current road, a current maximum discharge power of the power battery, a current maximum drive power of the motor, and a current consumption power of the high-voltage accessory, includes:
calculating available power according to the current maximum discharge power of the power battery and the current consumption power of the high-voltage accessory, and determining actual driving available power according to the available power and the current maximum driving power of the motor;
and calculating the current highest running speed of the electric vehicle according to the actual driving available power and the gradient information of the current road.
3. The electric vehicle power limited control method of claim 2, wherein the current highest operating speed of the electric vehicle is calculated according to the following equation:
P drive is available ＝[m*g*f*cos(a)+m*g*sin(a)+Cd*A*Vmax*Vmax/21.15]*Vmax，
Wherein P is Drive is available And for the actual driving available power, m is the full load mass value of the electric vehicle, g is 9.8, cd is the air resistance coefficient of the electric vehicle, a is the gradient of the current road, A is the windward area of the electric vehicle, f is the rolling resistance coefficient, and Vmax is the current highest running speed of the electric vehicle.
4. The electric vehicle power limited control method of claim 2, wherein determining actual drive available power from the available power and a current maximum drive power of the motor comprises:
and performing small value calculation on the available power and the current maximum driving power of the motor to determine the actual driving available power.
5. The electric vehicle power limited control method according to any one of claims 1 to 4, characterized in that obtaining a lowest speed limit of a current road includes:
information interaction is carried out through an ADAS system and a navigation system so as to obtain the lowest speed limit of the current road; or alternatively
And acquiring roadside speed limit traffic sign information through a vehicle-mounted camera so as to acquire the lowest speed limit of the current road.
6. The electric vehicle power-limited control method according to any one of claims 1 to 4, characterized in that the current highest running speed of the electric vehicle is also transmitted to a traffic management platform when the off-vehicle presentation device is controlled to issue a low-speed running presentation message.
7. The electric vehicle power-limited control method according to any one of claims 1 to 4, characterized in that the off-vehicle warning device is a warning lamp provided on a roof of the vehicle.
8. A computer-readable storage medium, characterized in that an electric vehicle power limitation control program is stored thereon, which when executed by a processor implements the electric vehicle power limitation control method of any of claims 1-7.
9. An electric vehicle comprising a memory, a processor, and an electric vehicle power-limited control program stored on the memory and operable on the processor, wherein the processor, when executing the electric vehicle power-limited control program, implements the electric vehicle power-limited control method of any of claims 1-7.
10. An electric vehicle power limited control system, comprising:
the battery manager is used for detecting the current maximum discharge power of the power battery;
a motor controller for detecting a current maximum driving power of the motor;
a body stabilization system controller for detecting gradient information of a current road;
the intelligent auxiliary driving system controller is used for acquiring the lowest speed limit of the current road;
an off-board prompting device;
the vehicle control device comprises a battery manager, a motor controller, a vehicle body stabilizing system controller, an intelligent auxiliary driving system controller and an external vehicle prompting device, wherein the vehicle controller is respectively connected with the battery manager, the motor controller, the vehicle body stabilizing system controller, the intelligent auxiliary driving system controller and the external vehicle prompting device, and is used for acquiring current consumption power of a high-voltage accessory of an electric vehicle when the electric vehicle runs on a road with limited low speed, calculating current highest running speed of the electric vehicle according to gradient information of the current road, current maximum discharge power of a power battery, current maximum driving power of a motor and current consumption power of the high-voltage accessory, and controlling the external vehicle prompting device to send low-speed running prompting information when the current highest running speed of the electric vehicle is smaller than the lowest speed limit of the current road.
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