CN112060941A - Electric automobile direct-current power supply rescue method - Google Patents

Electric automobile direct-current power supply rescue method Download PDF

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CN112060941A
CN112060941A CN202010984440.0A CN202010984440A CN112060941A CN 112060941 A CN112060941 A CN 112060941A CN 202010984440 A CN202010984440 A CN 202010984440A CN 112060941 A CN112060941 A CN 112060941A
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vehicle
power supply
electric
power
demand
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CN112060941B (en
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刘新磊
王希波
周长峰
衣丰艳
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Shandong Jiaotong University
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Shandong Jiaotong University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/14Plug-in electric vehicles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12Remote or cooperative charging

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a method for rescuing an electric automobile by direct-current power supply, which relates to the technical field of electric automobiles and adopts the technical scheme that an electric automobile terminal sends a request to a server; after receiving the request of the electric vehicle demand terminal, the server searches a power supply vehicle terminal group which accords with the judgment result according to the information corresponding to the electric vehicle demand terminal; the server sends the information of the electric vehicles to each power supply vehicle terminal in the power supply vehicle terminal group; the power supply vehicle terminal judges whether the requirements are met; the power supply vehicle receiving power supply is selected by the power demand vehicle terminal; the electric vehicle and the power supply vehicle are in electric and communication connection with each other after meeting according to the contact information. The invention has the beneficial effects that: the scheme reasonably plans the request and the response of the electric vehicle for supplying and requiring the dynamic charging of the existing electric vehicle, and through the scheme, the electric vehicle can be better served for information transmission when the dynamic charging request is carried out, and the selective reasonable distribution response of the power supply vehicle can not lead to the situation that the power supply vehicle is insufficient in self electric quantity because the power storage vehicle is charged.

Description

Electric automobile direct-current power supply rescue method
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a method for rescuing an electric automobile by forward power supply.
Background
In recent years, the new energy automobile industry in China is rapidly developed, and the new energy automobile output and sale volume is the first in the world. However, for the pure electric vehicle, the endurance mileage problem is still a main factor that restricts the realization of the comprehensive popularization of the pure electric vehicle. To solve this problem, a vehicle-to-vehicle dynamic charging system disclosed in patent application No. 201822036813.2 discloses a system for charging a vehicle without stopping the vehicle. Patent 'a car to car charger' with application number 201610223041.6 discloses a car and car charging technology for solving the technical problem that the system commonality that charges each other among the prior art between electric automobile is poor. Meanwhile, the intelligent automobile can realize the close-distance automatic following running function.
Although the prior art has the implementation mode related to the dynamic behavior of the vehicle to the vehicle, as a practical use, there is no corresponding technical scheme for actively making a rescue request and a rescue response when needed. When the electric vehicle runs, the situation that the vehicle is anchored or cannot reach a destination due to insufficient residual electricity occurs, no charging station or charging pile is available nearby, and even the residual electricity cannot enable the vehicle to run to a nearest charging station, and the like.
Disclosure of Invention
Aiming at the technical problem, the invention provides a method for rescuing an electric automobile by direct-current power supply.
The technical scheme is that the method comprises the following steps:
s1, a data channel between the electric vehicle demand terminal and the server is opened, and the electric vehicle demand terminal continuously sends a request message to the server;
s2, after receiving the request message of the power-on-demand vehicle terminal, the server performs preliminary judgment according to the information corresponding to the power-on-demand vehicle terminal, retrieves the power supply vehicle terminal in the activated state according to the judgment result, and retrieves a power supply vehicle terminal group according with the judgment result;
s3, the server sends the information of the electric vehicles in need to the power supply vehicle terminals in the power supply vehicle terminal group retrieved by the S2 in a message form;
s4, after the power supply vehicle terminal receives the information sent by the server in the S3, the power supply vehicle terminal or the driver judges whether the requirement of the power supply vehicle is met, and feedback is given to the server;
s5, the server sends response information to the power supply vehicle terminal after receiving the feedback information of the power supply vehicle terminal, the power supply vehicle terminal selects the power supply vehicle receiving power supply according to the response information of the server, and the server sends contact information to the power supply vehicle terminal;
and S6, after the selected power supply vehicle terminal receives the contact information in the S5, the power-on vehicle and the power supply vehicle meet according to the contact information, and then the vehicle is electrically connected with the power supply vehicle in a communication mode. The purpose of the communication link here is to communicate data between the two vehicles. Such as CAN bus connection, for information interaction. For example, an accelerator pedal signal, a brake pedal signal, a steering angle, a vehicle speed and the like of the opposite side are obtained, so that the two vehicles can keep the same line at a certain distance.
Preferably, in S1, the request message of the electric vehicle demand terminal includes a destination, a driving route, a minimum average vehicle speed required by the electric vehicle demand, a reward, and electric vehicle demand information;
the information of the electric vehicle comprises the total mass of the electric vehicle, the current residual electric quantity of the electric vehicle, the windward area, the air resistance coefficient, the unit mileage power consumption, the battery capacity, the rated voltage of the battery pack, the power supply and charging requirements, the total efficiency of the transmission system, the efficiency of the driving motor and the controller thereof, the average discharge efficiency of the power battery and the rated power of the vehicle-mounted charger.
Preferably, the reward comprises a charge per degree, or a full charge;
preferably, the power supply and charging requirements include power supply only running or power supply and charging simultaneously;
preferably, the total mass of the electric vehicle is the sum of the vehicle service mass and the total mass of passengers.
Preferably, the parameters of the destination, the driving route, the quality of passengers, the reward, the charging and power supply requirement, the charging capacity requirement and the like in the vehicle information can be set by a driver at an automobile system terminal.
Preferably, the vehicle information may be automatically recognized and set by the smart car, and the driver may be a passenger when the vehicle is unmanned, in consideration of the possibility of popularization of unmanned driving.
Preferably, the method for determining the search range for the power feeding vehicle terminal in S2 includes:
s201, determining whether the current position of the electric vehicle is an expressway or not according to a request message of the electric vehicle terminal;
s202, if the judgment result in the S201 is negative, searching the peripheral radius r of the power-demand vehicle terminal by taking the position of the power-demand vehicle terminal as the center of a circle1A power supply vehicle terminal within a kilometer range;
s203, if the judgment result in the S201 is positive, searching r in front of and behind the road of the power demand vehicle terminal by taking the position of the power demand vehicle terminal as the circle center2And (5) providing power supply vehicle terminals within kilometer range.
Preferably, in S4, after receiving the information sent by the server in S3, the terminal of the power supply vehicle determines whether the power supply vehicle meets the vehicle demand, including determining a driving route:
s411, after the power supply vehicle terminal receives the power demand vehicle request sent by the server, the position and destination information of the power demand vehicle and the subsequent journey of the power demand vehicle are obtained;
and S412, judging whether the subsequent travel of the power supply vehicle is in the travel route of the power demand vehicle or not by the power supply vehicle terminal according to the travel route formed by the current position and the destination of the power supply vehicle, and estimating the mileage of the same travel road section of the two vehicles as the judgment reference of the travel route.
Preferably, the determination of whether the power supply vehicle satisfies the power demand vehicle requirement in S4 includes a determination of whether the power supply vehicle can supply sufficient electric power to the power demand vehicle:
s421, inputting the minimum average speed required by the power supply vehicle by a power supply vehicle terminal user;
s422, the power supply vehicle system terminal estimates whether enough electric quantity is available for two vehicles to reach respective destinations;
the 422 includes the following calculation methods for the electric quantity of the power supply train:
Figure BDA0002688734130000031
wherein E iss1The unit of the residual electric quantity of the electric vehicle is kWh; es2The unit of the surplus electric quantity of the power supply vehicle is kWh; eB1The required electric quantity for the electric vehicle to reach the destination is kWh; eB2The unit of the electric quantity required by the power supply vehicle to reach the destination is kWh;
m1the unit is kg for the total mass of the electric vehicle; m is2The unit is kg for the total mass of the power supply train; g is the acceleration of gravity; f is a rolling resistance coefficient; cDIs the air resistance coefficient; a. the1Is the windward area of the electric car, and the unit is m2;A2Is the windward area of the power supply vehicle and has the unit of m2;umin1Minimum average speed, u, required by the user of the electric vehiclemin2The minimum average speed required by a user of the power supply vehicle; u is the driving speed used when the electric quantity needed by the destination is estimated, the unit is km/h, and u can be selected as a larger value of the lowest average speed required by the two vehicles; etaT1The total efficiency of the transmission system of the electric vehicle is calculated; etaT2The total efficiency of a transmission system of the power supply vehicle is improved; etaMC1Driving the motor and the controller efficiency for the electric vehicle; etaMC2To power the vehicle drive motor and its controller efficiency; etaD1The average discharge efficiency of the power battery of the electric vehicle is obtained; etaD2Average discharge efficiency of power batteries of the power supply vehicle; s1The number of the whole journey of the electric vehicle is km; s2The unit is km for the whole mileage of the power supply vehicle.
Preferably, in S4, determining whether the power supply vehicle meets the demand of the power supply vehicle includes determining whether the power of the power supply vehicle can meet the demand;
the power judgment of the power supply vehicle comprises the following steps:
the first condition is the condition of only supplying power without charging, and comprises that if the driving route of the power-demand vehicle is completely contained in the driving route of the power-supply vehicle, the power-supply vehicle only supplies power required by driving at the same speed with the power-demand vehicle, and the battery cell does not need to be charged;
if the part of the travel route of the power demand vehicle is included in the travel route of the power supply vehicle, when the residual electric quantity of the power demand vehicle is satisfied when the power demand vehicle and the power supply vehicle finish the same travel and travel to the destination of the power demand vehicle, the power supply vehicle only provides the power required by the power demand vehicle for the same-speed travel of the power demand vehicle and does not need to charge a battery of the power demand vehicle;
and the second situation is the situation that charging is needed in addition to power supply running, if the running route part of the electric demand vehicle is overlapped with the running route of the electric supply vehicle, when the electric demand vehicle and the electric supply vehicle finish running together, the residual electric quantity of the electric demand vehicle is not enough to support the electric demand vehicle to reach the destination, the electric supply vehicle needs to provide power for the electric demand vehicle to normally run at the overlapped stage of the running routes, and a battery of the electric demand vehicle also needs to be charged, so that the electric demand vehicle can smoothly reach the destination after the two vehicles are separated.
Preferably, the first power supply vehicle power judgment condition is that the output power of the power supply vehicle is satisfied,
Figure BDA0002688734130000041
in the formula: peThe unit of the output power of the power supply vehicle is kW; m is1The total mass (kg) of the electric vehicle is required; m is2The unit is kg for the total mass of the power supply train; g is the acceleration of gravity; f is a rolling resistance coefficient; cDIs the air resistance coefficient; a. the1Is the windward area of the electric car, and the unit is m2;A2Is the windward area of the power supply vehicle and has the unit of m2(ii) a u is the driving speed for estimation, and the unit is km/h; etaT1The total efficiency of the transmission system of the electric vehicle is calculated; etaT2The total efficiency of the transmission system of the power supply vehicle is improved.
Preferably, the second power supply vehicle power judgment method is that the output power of the power supply vehicle is satisfied,
Figure BDA0002688734130000051
in the formula: pe2The unit of the output power of the power supply vehicle is kW; etaCFor charging efficiency, PecThe input power of the battery of the electric vehicle is needed; es1The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is ST;ETThe electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
Preferably, the electric vehicle-required information includes a current brand and model of an automobile;
inquiring inherent information of the corresponding automobile, such as automobile servicing quality, air resistance coefficient, windward area and other parameters, from a preset database according to the brand and the model of the corresponding automobile through the brand and the model of the automobile;
constructing a unit mileage power consumption value database of big data statistics of vehicles on different road conditions;
estimating the electric quantity according to the unit mileage electric consumption value of the power supply car and the power demand car corresponding to the similar road condition in the unit mileage electric consumption value database;
the method comprises the following steps of obtaining vehicle information of the electric vehicle according to big data statistics through the current automobile brand and model, wherein the estimation method comprises the following steps:
in the formula: eB1The unit of the electric quantity required by the electric vehicle to complete the whole process is kWh; eB2The unit of the required electric quantity for completing the whole process is kWh; es1The unit of the residual electric quantity of the electric vehicle is kWh; es2The unit of the surplus electric quantity of the power supply vehicle is kWh;
e1the unit is the unit mileage power consumption of the electric vehicle, and the unit is kWh/km; e.g. of the type2The unit is the unit mileage and the unit of the power consumption of the power supply vehicle, and the unit is kWh/km.
On the premise of big data statistics, the second judging method of the power supply vehicle power judging condition is that the output power of the power supply vehicle is satisfied,
Figure BDA0002688734130000061
in the formula: pe2The unit of the output power of the power supply vehicle is kW; etaCFor charging efficiency, PecThe input power of the battery of the electric vehicle is needed; es1The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is ST;ETThe electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
Preferably, the step S4 of determining whether the power supply vehicle satisfies the power demand vehicle requirement further includes determining whether an output voltage of the power supply vehicle satisfies an input voltage value requirement of the power demand vehicle.
Preferably, the step S4 includes determining whether the power supply vehicle satisfies the demand vehicle demand, and determining whether the driver of the power supply vehicle agrees to a reward for the demand vehicle.
Preferably, after the selected power supply vehicle terminal receives the contact information in S5 in S6, the server backs up the contact information;
the contact information comprises an appointment place, a license plate number and a contact way.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the scheme reasonably plans the request and the response of the electric vehicle for supplying and requiring the dynamic charging of the existing electric vehicle, and through the scheme, the electric vehicle can be better served for information transmission when the dynamic charging request is carried out, and the selective reasonable distribution response of the power supply vehicle can not lead to the situation that the power supply vehicle is insufficient in self electric quantity because the power storage vehicle is charged.
According to the scheme, the power supply vehicle can be any electric vehicle which runs along the road and is provided with the corresponding intelligent terminal, namely any electric vehicle with sufficient electric quantity on the similar running road can be used as the power supply vehicle to provide electric energy for the vehicle with insufficient electric quantity to be conveyed, so that the electric vehicle can be supplied with power along the road and has wider applicability.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. Of course, the specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example 1
The invention provides a method for rescuing an electric automobile by direct-current power supply, which comprises the following steps of:
s1, a data channel between the electric vehicle demand terminal and the server is opened, and the electric vehicle demand terminal continuously sends a request message to the server;
s2, after receiving the request message of the power-on-demand vehicle terminal, the server performs preliminary judgment according to the information corresponding to the power-on-demand vehicle terminal, retrieves the power supply vehicle terminal in the activated state according to the judgment result, and retrieves a power supply vehicle terminal group according with the judgment result;
s3, the server sends the information of the electric vehicles in need to the power supply vehicle terminals in the power supply vehicle terminal group retrieved by the S2 in a message form;
s4, after the power supply vehicle terminal receives the information sent by the server in the S3, the power supply vehicle terminal or the driver judges whether the requirement of the power supply vehicle is met, and feedback is given to the server;
s5, the server sends response information to the power supply vehicle terminal after receiving the feedback information of the power supply vehicle terminal, the power supply vehicle terminal selects the power supply vehicle receiving power supply according to the response information of the server, and the server sends contact information to the power supply vehicle terminal;
and S6, after the selected power supply vehicle terminal receives the contact information in the S5, the power-on vehicle and the power supply vehicle meet according to the contact information, and then the vehicle is electrically connected with the power supply vehicle in a communication mode. The purpose of the communication link here is to communicate data between the two vehicles. Such as CAN bus connection, for information interaction. For example, an accelerator pedal signal, a brake pedal signal, a steering angle, a vehicle speed and the like of the opposite side are obtained, so that the two vehicles can keep the same line at a certain distance.
In S1, the request message of the electric vehicle demand terminal includes a destination, a driving route, a minimum average vehicle speed required by the electric vehicle demand, a reward, and electric vehicle demand information;
the electric vehicle information comprises the total mass of the electric vehicle, the current residual electric quantity of the electric vehicle, the windward area, the air resistance coefficient, the unit mileage power consumption, the battery capacity, the rated voltage of the battery pack, the power supply and charging requirements, the total efficiency of the transmission system, the efficiency of the driving motor and the controller thereof, the average discharge efficiency of the power battery and the rated power of the vehicle-mounted charger.
The reward comprises charging per unit degree or charging at full price;
the power supply and charging requirements comprise two conditions of only power supply running or simultaneous power supply and charging;
the total mass of the electric vehicle is the sum of the vehicle servicing mass and the total mass of passengers.
The destination, the driving route, the passenger quality, the reward, the charging and power supply requirement, the charging electric quantity requirement and other parameters in the vehicle information can be set by a driver at a vehicle system terminal, and can also be automatically identified and set by an intelligent vehicle.
The method for determining the search range of the power feeding vehicle terminal in S2 includes:
s201, determining whether the current position of the electric vehicle is an expressway or not according to a request message of the electric vehicle terminal;
s202, if the judgment result in the S201 is negative, searching the peripheral radius r of the power-demand vehicle terminal by taking the position of the power-demand vehicle terminal as the center of a circle1A power supply vehicle terminal within a kilometer range;
s203, if the judgment result of S201 is yes, the position of the electricity demand vehicle terminal is used as the circle center, and r, in front of and behind the road, of the electricity demand vehicle terminal is searched2And (5) providing power supply vehicle terminals within kilometer range.
In S4, after receiving the information sent by the server in S3, the power supply vehicle terminal determines whether the power supply vehicle meets the vehicle demand, including determining a driving route:
s411, after the power supply vehicle terminal receives the power demand vehicle request sent by the server, the position and destination information of the power demand vehicle and the subsequent journey of the power demand vehicle are obtained;
and S412, judging whether the subsequent travel of the power supply vehicle is in the travel route of the power demand vehicle or not by the power supply vehicle terminal according to the travel route formed by the current position and the destination of the power supply vehicle, and estimating the mileage of the same travel road section of the two vehicles as the judgment reference of the travel route.
The determination of whether the power supply vehicle satisfies the power demand vehicle demand in S4 includes a determination of whether the power supply vehicle can supply sufficient electric power to the power demand vehicle:
s421, inputting the minimum average speed required by the power supply vehicle by a power supply vehicle terminal user;
s422, the power supply vehicle system terminal estimates whether enough electric quantity is available for two vehicles to reach respective destinations;
the calculation method for the electric quantity of the power supply train in 422 is as follows:
Figure BDA0002688734130000081
wherein E iss1The unit of the residual electric quantity of the electric vehicle is kWh; es2The unit of the surplus electric quantity of the power supply vehicle is kWh; eB1The required electric quantity for the electric vehicle to reach the destination is kWh; eB2The unit of the electric quantity required by the power supply vehicle to reach the destination is kWh;
m1the unit is kg for the total mass of the electric vehicle; m is2The unit is kg for the total mass of the power supply train; g is the acceleration of gravity; f is a rolling resistance coefficient; cDIs the air resistance coefficient; a. the1Is the windward area of the electric car, and the unit is m2;A2Is the windward area of the power supply vehicle and has the unit of m2;umin1Minimum average speed, u, required by the user of the electric vehiclemin2The minimum average speed required by a user of the power supply vehicle; u is the driving speed used when the electric quantity needed by the destination is estimated, the unit is km/h, and u can be selected as a larger value of the lowest average speed required by the two vehicles; etaT1The total efficiency of the transmission system of the electric vehicle is calculated; etaT2The total efficiency of a transmission system of the power supply vehicle is improved; etaMC1Driving the motor and the controller efficiency for the electric vehicle; etaMC2To power the vehicle drive motor and its controller efficiency; etaD1The average discharge efficiency of the power battery of the electric vehicle is obtained; etaD2Average discharge efficiency of power batteries of the power supply vehicle; s1For demanding an electric carMileage is km; s2The unit is km for the whole mileage of the power supply vehicle.
Judging whether the power supply vehicle meets the requirement of the power demand vehicle or not in S4, wherein the judgment on whether the power of the power supply vehicle can meet the requirement or not is carried out;
the power judgment of the power supply vehicle comprises the following steps:
the first condition is the condition of only supplying power without charging, and comprises that if the driving route of the power-demand vehicle is completely contained in the driving route of the power-supply vehicle, the power-supply vehicle only supplies power required by driving at the same speed with the power-demand vehicle, and the battery cell does not need to be charged;
if the part of the travel route of the power demand vehicle is included in the travel route of the power supply vehicle, when the residual electric quantity of the power demand vehicle is satisfied when the power demand vehicle and the power supply vehicle finish the same travel and travel to the destination of the power demand vehicle, the power supply vehicle only provides the power required by the power demand vehicle for the same-speed travel of the power demand vehicle and does not need to charge a battery of the power demand vehicle;
and the second situation is the situation that charging is needed in addition to power supply running, if the running route part of the electric demand vehicle is overlapped with the running route of the electric supply vehicle, when the electric demand vehicle and the electric supply vehicle finish running together, the residual electric quantity of the electric demand vehicle is not enough to support the electric demand vehicle to reach the destination, the electric supply vehicle needs to provide power for the electric demand vehicle to normally run at the overlapped stage of the running routes, and a battery of the electric demand vehicle also needs to be charged, so that the electric demand vehicle can smoothly reach the destination after the two vehicles are separated.
The first power supply vehicle power judgment condition is that the output power of the power supply vehicle is satisfied,
Figure BDA0002688734130000091
in the formula: peThe unit of the output power of the power supply vehicle is kW; m is1The total mass (kg) of the electric vehicle is required; m is2The unit is kg for the total mass of the power supply train; g is the acceleration of gravity; f is a rolling resistance coefficient; cDIs the air resistance coefficient; a. the1Is the windward area of the electric car, and the unit is m2;A2Is the windward area of the power supply vehicle and has the unit of m2(ii) a u is the driving speed for estimation, and the unit is km/h; etaT1The total efficiency of the transmission system of the electric vehicle is calculated; etaT2The total efficiency of the transmission system of the power supply vehicle is improved.
The second judgment method for the power supply vehicle power judgment condition is that the output power of the power supply vehicle is satisfied,
Figure BDA0002688734130000101
in the formula: pe2The unit of the output power of the power supply vehicle is kW; etaCFor charging efficiency, PecThe input power of the battery of the electric vehicle is needed; es1The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is ST;ETThe electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
In S4, it is determined whether the power supply vehicle meets the demand for the power demand vehicle, and it is further determined whether the output voltage of the power supply vehicle meets the demand for the input voltage value of the demand for the power demand vehicle.
In S4, it is determined whether the power supply vehicle satisfies the demand for the electric vehicle, and it is determined whether the driver of the power supply vehicle agrees to a reward for the electric vehicle.
S6, after the selected power supply vehicle terminal receives the contact information in the S5, the server backs up the contact information;
the contact information comprises an appointment place, a license plate number and a contact way.
Example 2
On the basis of embodiment 1, unlike embodiment 1, the electric vehicle-required information includes the current brand and model of the vehicle;
inquiring inherent information of the corresponding automobile, such as automobile servicing quality, air resistance coefficient, windward area and other parameters, from a preset database according to the brand and the model of the corresponding automobile through the brand and the model of the automobile;
constructing a unit mileage power consumption value database of big data statistics of vehicles on different road conditions;
estimating the electric quantity according to unit mileage electric consumption values of the power supply vehicle and the power demand vehicle corresponding to similar road conditions in a unit mileage electric consumption value database;
the method comprises the following steps of obtaining vehicle information of the electric vehicle according to big data statistics through the current automobile brand and model, wherein the estimation method comprises the following steps:
Figure BDA0002688734130000111
in the formula: eB1The unit of the electric quantity required by the electric vehicle to complete the whole process is kWh; eB2The unit of the required electric quantity for completing the whole process is kWh; es1The unit of the residual electric quantity of the electric vehicle is kWh; es2The unit of the surplus electric quantity of the power supply vehicle is kWh;
e1the unit is the unit mileage power consumption of the electric vehicle, and the unit is kWh/km; e.g. of the type2The unit is the unit mileage and the unit of the power consumption of the power supply vehicle, and the unit is kWh/km.
On the premise of big data statistics, the second judgment method of the power supply vehicle power judgment condition is that the output power of the power supply vehicle is satisfied,
Figure BDA0002688734130000112
in the formula: pe2The unit of the output power of the power supply vehicle is kW; etaCFor charging efficiency, PecThe input power of the battery of the electric vehicle is needed; es1The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is ST;ETThe electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (11)

1. A method for rescuing an electric automobile by forward power supply is characterized by comprising the following steps:
s1, a data channel between the electric vehicle demand terminal and the server is opened, and the electric vehicle demand terminal continuously sends a request message to the server;
s2, after receiving the request message of the power-on-demand vehicle terminal, the server performs preliminary judgment according to the information corresponding to the power-on-demand vehicle terminal, retrieves the power supply vehicle terminal in the activated state according to the judgment result, and retrieves a power supply vehicle terminal group according with the judgment result;
s3, the server sends the information of the electric vehicles in need to the power supply vehicle terminals in the power supply vehicle terminal group retrieved by the S2 in a message form;
s4, after receiving the information sent by the server in the S3, the power supply vehicle terminal judges whether the requirement of the power supply vehicle is met, and feeds back the requirement to the server;
s5, the server sends response information to the power supply vehicle terminal after receiving the feedback information of the power supply vehicle terminal, the power supply vehicle terminal selects the power supply vehicle receiving power supply according to the response information of the server, and the server sends contact information to the power supply vehicle terminal;
and S6, after the selected power supply vehicle terminal receives the contact information in the S5, the power-on vehicle and the power supply vehicle meet according to the contact information, and then the vehicle is electrically connected with the power supply vehicle in a communication mode.
2. The electric vehicle on-road power supply rescue method according to claim 1, wherein in S1, the request message of the electric vehicle terminal includes a destination, a driving route, a minimum average vehicle speed required by the electric vehicle, a reward, and electric vehicle information;
the information of the electric vehicle comprises the total mass of the electric vehicle, the current residual electric quantity of the electric vehicle, the windward area, the air resistance coefficient, the unit mileage power consumption, the power supply and charging requirements, the total efficiency of a transmission system, the efficiency of a driving motor and a controller thereof, the average discharge efficiency of a power battery and the rated power of a vehicle-mounted charger.
3. The electric vehicle on-road power supply rescue method according to claim 2, wherein the method for determining the search range of the power supply vehicle terminal in S2 includes:
s201, determining whether the current position of the electric vehicle is an expressway or not according to a request message of the electric vehicle terminal;
s202, if the judgment result in the S201 is negative, searching the peripheral radius r of the power-demand vehicle terminal by taking the position of the power-demand vehicle terminal as the center of a circle1A power supply vehicle terminal within a kilometer range;
s203, if the judgment result in the S201 is positive, searching r in front of and behind the road of the power demand vehicle terminal by taking the position of the power demand vehicle terminal as the circle center2And (5) providing power supply vehicle terminals within kilometer range.
4. The electric vehicle on-road power supply rescue method of claim 3, wherein in the step S4, after the terminal of the power supply vehicle receives the information sent by the server in the step S3, the power supply vehicle determines whether the power supply vehicle meets the demand of the power supply vehicle, and the determination of the driving route comprises:
s411, after the power supply vehicle terminal receives the power demand vehicle request sent by the server, the position and destination information of the power demand vehicle and the subsequent journey of the power demand vehicle are obtained;
and S412, judging whether the subsequent travel of the power supply vehicle is in the travel route of the power demand vehicle or not by the power supply vehicle terminal according to the travel route formed by the current position and the destination of the power supply vehicle, and estimating the mileage of the same travel road section of the two vehicles as the judgment reference of the travel route.
5. The electric vehicle on-road power supply rescue method according to claim 4, wherein the determination of whether the power supply vehicle meets the power demand vehicle requirement in S4 includes a determination of whether the power supply vehicle can provide enough power for the power demand vehicle:
s421, inputting the minimum average speed required by the power supply vehicle by a power supply vehicle terminal user;
s422, the power supply vehicle system terminal estimates whether enough electric quantity is available for two vehicles to reach respective destinations;
the 422 includes the following calculation methods for the electric quantity of the power supply train:
Figure FDA0002688734120000021
wherein E iss1The unit of the residual electric quantity of the electric vehicle is kWh; es2The unit of the surplus electric quantity of the power supply vehicle is kWh; eB1The required electric quantity for the electric vehicle to reach the destination is kWh; eB2The unit of the electric quantity required by the power supply vehicle to reach the destination is kWh;
m1the unit is kg for the total mass of the electric vehicle; m is2The unit is kg for the total mass of the power supply train; g is the acceleration of gravity; f is a rolling resistance coefficient; cDIs the air resistance coefficient; a. the1Is the windward area of the electric car, and the unit is m2;A2Is the windward area of the power supply vehicle and has the unit of m2;umin1Minimum average speed, u, required by the user of the electric vehiclemin2The minimum average speed required by a user of the power supply vehicle; u is the driving speed used when the electric quantity needed by the destination is estimated, the unit is km/h, and u can be selected as a larger value of the lowest average speed required by the two vehicles; etaT1The total efficiency of the transmission system of the electric vehicle is calculated; etaT2The total efficiency of a transmission system of the power supply vehicle is improved; etaMC1Driving the motor and the controller efficiency for the electric vehicle; etaMC2To power the vehicle drive motor and its controller efficiency; etaD1The average discharge efficiency of the power battery of the electric vehicle is obtained; etaD2Average discharge efficiency of power batteries of the power supply vehicle; s1The number of the whole journey of the electric vehicle is km; s2The unit is km for the whole mileage of the power supply vehicle.
6. The electric vehicle on-road power supply rescue method according to claim 5, wherein the step S4 of determining whether the power supply vehicle meets the demand of the power supply vehicle comprises determining whether the power of the power supply vehicle can meet the demand;
the power judgment of the power supply vehicle comprises the following steps:
the first condition is the condition of only supplying power without charging, and comprises that if the driving route of the power-demand vehicle is completely contained in the driving route of the power-supply vehicle, the power-supply vehicle only supplies power required by driving at the same speed with the power-demand vehicle, and the battery cell does not need to be charged;
if the part of the travel route of the power demand vehicle is included in the travel route of the power supply vehicle, when the residual electric quantity of the power demand vehicle is satisfied when the power demand vehicle and the power supply vehicle finish the same travel and travel to the destination of the power demand vehicle, the power supply vehicle only provides the power required by the power demand vehicle for the same-speed travel of the power demand vehicle and does not need to charge a battery of the power demand vehicle;
and the second situation is the situation that charging is needed in addition to power supply running, if the running route part of the electric demand vehicle is overlapped with the running route of the electric supply vehicle, when the electric demand vehicle and the electric supply vehicle finish running together, the residual electric quantity of the electric demand vehicle is not enough to support the electric demand vehicle to reach the destination, the electric supply vehicle needs to provide power for the electric demand vehicle to normally run at the overlapped stage of the running routes, and a battery of the electric demand vehicle also needs to be charged, so that the electric demand vehicle can smoothly reach the destination after the two vehicles are separated.
7. The rescue method of electric vehicle power supply along the road according to claim 6, characterized in that the first power supply vehicle power judgment condition is judged by that the output power of the power supply vehicle is satisfied,
Figure FDA0002688734120000031
in the formula: peThe unit of the output power of the power supply vehicle is kW; m is1The total mass (kg) of the electric vehicle is required; m is2The unit is kg for the total mass of the power supply train; g is the acceleration of gravity; f is a rolling resistance coefficient; cDIs the air resistance coefficient; a. the1Is the windward area of the electric car, and the unit is m2;A2Is the windward area of the power supply vehicle and has the unit of m2(ii) a u is the driving speed for estimation, and the unit is km/h; etaT1The total efficiency of the transmission system of the electric vehicle is calculated; etaT2The total efficiency of the transmission system of the power supply vehicle is improved.
8. The rescue method for electric vehicle direct-current power supply according to claim 7, characterized in that the second power supply vehicle power judgment condition is that the output power of the power supply vehicle is satisfied,
Figure FDA0002688734120000041
in the formula: pe2The unit of the output power of the power supply vehicle is kW; etaCFor charging efficiency, PecThe input power of the battery of the electric vehicle is needed; es1The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is ST;ETThe electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
9. The electric vehicle on-road power supply rescue method according to claim 7, characterized in that the electric vehicle-required information comprises a current vehicle brand and model;
inquiring inherent information of the corresponding automobile, such as automobile servicing quality, air resistance coefficient and windward area parameter, from a preset database according to the brand and the model of the corresponding automobile through the brand and the model of the automobile;
constructing a unit mileage power consumption value database of big data statistics of vehicles on different road conditions;
estimating the electric quantity according to the unit mileage electric consumption value of the power supply car and the power demand car corresponding to the similar road condition in the unit mileage electric consumption value database;
the method comprises the following steps of obtaining vehicle information of the electric vehicle according to big data statistics through the current automobile brand and model, wherein the estimation method comprises the following steps:
Figure FDA0002688734120000042
in the formula: eB1The unit of the electric quantity required by the electric vehicle to complete the whole process is kWh; eB2The unit of the required electric quantity for completing the whole process is kWh; es1The unit of the residual electric quantity of the electric vehicle is kWh; es2The unit of the surplus electric quantity of the power supply vehicle is kWh;
e1the unit is the unit mileage power consumption of the electric vehicle, and the unit is kWh/km; e.g. of the type2The unit is the unit mileage and the unit of the power consumption of the power supply vehicle, and the unit is kWh/km.
On the premise of big data statistics, the second judging method of the power supply vehicle power judging condition is that the output power of the power supply vehicle is satisfied,
Figure FDA0002688734120000051
in the formula: pe2The unit of the output power of the power supply vehicle is kW; etaCFor charging efficiency, PecThe input power of the battery of the electric vehicle is needed; es1The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is ST;ETThe electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
10. The electric vehicle on-road power supply rescue method according to claims 1-9, wherein the step S4 is performed to determine whether the power supply vehicle meets the power demand vehicle requirement, and further comprising determining whether the output voltage of the power supply vehicle meets the input voltage value requirement of the power demand vehicle.
11. The electric vehicle on-road power supply rescue method according to claims 1-10, characterized in that after the selected power supply vehicle terminal of S6 receives the contact information of S5, the server backs up the contact information;
the contact information comprises an appointment place, a license plate number and a contact way.
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