CN112060941B - Electric automobile direct-current power supply rescue method - Google Patents

Electric automobile direct-current power supply rescue method Download PDF

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CN112060941B
CN112060941B CN202010984440.0A CN202010984440A CN112060941B CN 112060941 B CN112060941 B CN 112060941B CN 202010984440 A CN202010984440 A CN 202010984440A CN 112060941 B CN112060941 B CN 112060941B
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vehicle
power supply
electric
power
demand
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CN112060941A (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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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS 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
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12—Remote 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 rescue method for the on-road power supply of an electric vehicle, which relates to the technical field of electric vehicles, and adopts the technical scheme that a power-on-demand vehicle 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: this scheme has made rational planning to the supply and demand trolley-bus request and the response that current electric automobile developments were charged, through this scheme, can be better serve the information transmission of electric automobile when the dynamic charging request, and the rational distribution response of power supply car selectivity, can not lead to the power supply car to cause self electric quantity not enough because charge to the storage battery car.

Description

Electric vehicle 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 amount is the first place 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 the problem, a patent "a vehicle-to-vehicle dynamic charging system" with application number 201822036813.2 discloses a system for realizing vehicle-to-vehicle charging without stopping a vehicle. Patent application No. 201610223041.6 discloses a car-to-car charger a car-to-car charging technology for solving the technical problem of poor system universality of mutual charging between electric vehicles in the prior art. 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 requiring terminal and the server is opened, and the electric vehicle requiring terminal continuously sends a request message to the server;
s2, after receiving the request message of the electric vehicle requiring terminal, the server performs preliminary judgment according to the information corresponding to the electric vehicle requiring terminal, searches the activated power supply vehicle terminal according to the judgment result, and searches a power supply vehicle terminal group according with the judgment result;
s3, the server sends the information of the electric vehicles needing to be driven to each power supply vehicle terminal in the power supply vehicle terminal group retrieved in the S2 in a message mode;
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 power demand vehicle requirement 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 are driven for communication with the vehicle according to the contact information. 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 demand comprises the total mass of the electric vehicle demand, the current residual capacity of the electric vehicle demand, the windward area, the air resistance coefficient, the unit mileage power consumption, the battery capacity, the rated voltage of a battery pack, 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.
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 a smart car, and the driver may be a passenger when the vehicle is not driven, in consideration of the possibility of popularization of unmanned driving.
Preferably, 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 circle 1 A supply vehicle terminal within kilometers;
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 center 2 And (4) power supply vehicle terminals in 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 as to whether the power supply vehicle meets the power demand vehicle in S4 includes a determination as to 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 steps:
Figure BDA0002688734130000031
wherein E is s1 The unit of the residual electric quantity of the electric vehicle is kWh; e s2 The unit of the residual electric quantity of the power supply vehicle is kWh; e B1 The required electric quantity for the electric vehicle to reach the destination is kWh; e B2 The unit of the electric quantity required by the power supply vehicle to reach the destination is kWh;
m 1 the unit is kg for the total mass of the electric vehicle; m is 2 The unit is kg for the total mass of the power supply train; g is the acceleration of gravity; f is a rolling resistance coefficient; c D Is the air resistance coefficient; a. The 1 Is the windward area of the electric car, and the unit is m 2 ；A 2 Is the windward area of the power supply train and has the unit of m 2 ；u min1 Minimum average vehicle speed, u, required by the user of the electric vehicle min2 To supply forThe lowest average speed required by the tram user; 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; eta T1 The total efficiency of the transmission system of the electric vehicle is required; eta T2 The total efficiency of a transmission system of the power supply vehicle is improved; eta MC1 Driving the motor and the controller efficiency for the electric vehicle; eta MC2 To power the vehicle drive motor and its controller efficiency; eta D1 The average discharge efficiency of the power battery of the electric vehicle is obtained; eta D2 Average discharge efficiency of power batteries of the power supply vehicle; s is 1 The number of the whole journey of the electric vehicle is km; s is 2 The unit is km for the whole mileage of the power supply vehicle.
Preferably, in the step S4, it is determined whether the power supply vehicle meets the demand of the power supply vehicle, including 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: p is e Outputting power for a power supply vehicle, wherein the unit is kW; m is 1 The total mass (kg) of the electric vehicle is required; m is 2 The unit is kg for the total mass of the power supply train; g is gravity acceleration; f is a rolling resistance coefficient; c D Is the air resistance coefficient; a. The 1 Is the windward area of the electric car, and the unit is m 2 ；A 2 Is the windward area of the power supply vehicle and has the unit of m 2 (ii) a u is the driving speed for estimation, and the unit is km/h; eta T1 The total efficiency of the transmission system of the electric vehicle is calculated; eta T2 The 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: p is e2 The unit of the output power of the power supply vehicle is kW; eta C For efficiency of charging, P ec The input power of the battery of the electric vehicle is needed; e s1 The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is S T ；E T The electric quantity required by the two vehicles running in the same mileage is completed.
Preferably, the vehicle information requiring electric vehicle 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 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 BDA0002688734130000052
in the formula: e B1 The unit of the electric quantity required by the electric vehicle to complete the whole process is kWh; e B2 The unit of the required electric quantity for completing the whole process is kWh; e s1 The unit of the residual electric quantity of the electric vehicle is kWh; e s2 The unit of the surplus electric quantity of the power supply vehicle is kWh;
e 1 the unit of mileage and power consumption of the electric vehicle is kWh/km; e.g. of the type 2 The 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: p e2 Outputting power for a power supply vehicle, wherein the unit is kW; eta C For charging efficiency, P ec The input power of the battery of the electric vehicle is needed; e s1 The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is S T ；E T The 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 meets the demand vehicle requirement further includes determining whether an output voltage of the power supply vehicle meets an input voltage value requirement of the demand vehicle.
Preferably, the step S4 of determining whether the power supply vehicle satisfies the demand for power supply vehicle further includes determining whether a driver of the power supply vehicle agrees to a reward for the demand for power supply vehicle.
Preferably, in the step S6, after the selected power supply vehicle terminal receives the contact information in the step S5, 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.
Through 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 transmission for the vehicle with insufficient electric quantity, so that the electric vehicle has wider applicability in power supply along the road.
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 limit the invention.
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 electric vehicle requiring terminal, the server performs preliminary judgment according to the information corresponding to the electric vehicle requiring terminal, searches the power supply vehicle terminal in the activated state according to the judgment result, and searches a power supply vehicle terminal group according with the judgment result;
s3, the server sends the information of the electric vehicles needing to be driven to each power supply vehicle terminal in the power supply vehicle terminal group retrieved in the S2 in a message mode;
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 power demand vehicle requirement 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 contact information is sent to the power supply vehicle terminal through the server;
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 drive the vehicle according to the contact information, and the vehicle is in electrical and communication connection with the vehicle. 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, a request message of a power-demand vehicle terminal comprises a destination, a driving route, the lowest average vehicle speed required by the power-demand vehicle, a reward and power-demand 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 battery capacity, the rated voltage of a battery pack, 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.
The reward comprises charging according to unit degrees 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.
Parameters such as destination, driving route, passenger quality, reward, charging and power supply requirements, charging electric quantity requirements and the like 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 judging the retrieval range of the power supply vehicle terminal in the S2 comprises the following steps of judging the position range of the power supply vehicle terminal:
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 circle 1 A 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 searched 2 And (5) providing power supply vehicle terminals within kilometer range.
In S4, after the power supply vehicle terminal receives the information sent by the server in S3, whether the power supply vehicle meets the requirement of the power demand vehicle is judged, and the judgment on the driving route is included:
s411, after the power supply vehicle terminal receives a 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, the power supply vehicle terminal judges whether the subsequent travel of the power supply vehicle is in the travel route of the power demand vehicle according to the current position of the power supply vehicle and the travel route formed by the destination, and estimates the mileage of the same travel road section of the two vehicles as the judgment reference of the travel route.
And S4, judging whether the power supply vehicle meets the power demand vehicle requirement, wherein the judgment on whether the power supply vehicle can provide enough electric quantity for the power demand vehicle comprises the following steps:
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 is s1 For the residual electricity of the electric vehicleThe bit is kWh; e s2 The unit of the surplus electric quantity of the power supply vehicle is kWh; e B1 The required electric quantity for the electric vehicle to reach the destination is kWh; e B2 The unit of the electric quantity required by the power supply vehicle to reach the destination is kWh;
m 1 the unit is kg for the total mass of the electric vehicle; m is a unit of 2 The unit is kg for the total mass of the power supply train; g is gravity acceleration; f is a rolling resistance coefficient; c D Is the air resistance coefficient; a. The 1 Is the windward area of the electric car, and the unit is m 2 ；A 2 Is the windward area of the power supply train and has the unit of m 2 ；u min1 Minimum average speed, u, required by the user of the electric vehicle min2 The minimum average vehicle 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; eta T1 The total efficiency of the transmission system of the electric vehicle is calculated; eta T2 The total efficiency of a transmission system of the power supply vehicle is improved; eta MC1 Driving the motor and the controller efficiency for the electric vehicle; eta MC2 To power the vehicle drive motor and its controller efficiency; eta D1 The average discharge efficiency of the power battery of the electric vehicle is obtained; eta D2 Average discharge efficiency of power batteries of the power supply vehicle is obtained; s 1 The unit of the mileage is km; s 2 The unit of the distance is km.
S4, judging whether the power supply vehicle meets the demand of the power-demand vehicle or not, wherein the judgment is carried out on whether the power of the power supply vehicle can meet the demand or not;
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 that the power supply driving and the charging are needed, if the driving route part of the electric demand vehicle is overlapped with the driving route of the electric supply vehicle, and after the electric demand vehicle and the electric supply vehicle finish the same driving, 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 drive at the overlapped stage of the driving routes, and also needs to charge a battery of the electric demand vehicle, 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: p e The unit of the output power of the power supply vehicle is kW; m is 1 The total mass (kg) of the electric vehicle is required; m is a unit of 2 The unit is kg for the total mass of the power supply train; g is the acceleration of gravity; f is a rolling resistance coefficient; c D Is the air resistance coefficient; a. The 1 Is the windward area of the electric car, and the unit is m 2 ；A 2 Is the windward area of the power supply vehicle and has the unit of m 2 (ii) a u is the driving speed for estimation, and the unit is km/h; eta T1 The total efficiency of the transmission system of the electric vehicle is calculated; eta T2 The 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: p is e2 Outputting power for a power supply vehicle, wherein the unit is kW; eta C For efficiency of charging, P ec The input power of the battery of the electric vehicle is needed; e s1 The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is S T ；E T The electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
And S4, judging whether the power supply vehicle meets the requirement of the power demand vehicle or not, and judging whether the output voltage of the power supply vehicle meets the requirement of the input voltage value of the power demand vehicle or not.
And S4, judging whether the power supply vehicle meets the demand of the power demand vehicle or not, and judging whether a driver of the power supply vehicle agrees to the reward of the power demand vehicle or not.
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;
querying 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: e B1 The unit of the required electric quantity is kWh for the electric vehicle to complete the whole process; e B2 The unit of the required electric quantity for completing the whole process is kWh; e s1 The unit of the residual electric quantity of the electric vehicle is kWh; e s2 The unit of the residual electric quantity of the power supply vehicle is kWh;
e 1 the unit of mileage and power consumption of the electric vehicle is kWh/km; e.g. of the type 2 Is the unit mileage power consumption of the power supply vehicle, and the unit iskWh/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 meets,
Figure BDA0002688734130000112
in the formula: p e2 The unit of the output power of the power supply vehicle is kW; eta C For charging efficiency, P ec The input power of the battery of the electric vehicle is needed; e s1 The unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same-run road section is S T ；E T The 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 (10)

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 requiring terminal and the server is opened, and the electric vehicle requiring terminal continuously sends a request message to the server;
s2, after receiving the request message of the electric vehicle requiring terminal, the server performs preliminary judgment according to the information corresponding to the electric vehicle requiring terminal, searches the activated power supply vehicle terminal according to the judgment result, and searches 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 in the S2 in a message mode;
s4, after receiving the information sent by the server in the S3, the power supply vehicle terminal judges whether the demand of the power supply vehicle is met, and feeds back the demand 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;
s6, after the selected power supply vehicle terminal receives the contact information in the S5, the power-on vehicle and the power supply vehicle are driven to be in electric and communication connection with the vehicle according to the contact information;
wherein, the step S4 of determining whether the power supply vehicle meets the demand of the power demand vehicle includes determining whether the power supply vehicle can provide enough electric quantity for the 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 135595DEST_PATH_IMAGE001
wherein,
Figure 383037DEST_PATH_IMAGE002
the unit of the residual electric quantity of the electric vehicle is kWh;
Figure 453761DEST_PATH_IMAGE003
the unit of the residual electric quantity of the power supply vehicle is kWh;
Figure 694118DEST_PATH_IMAGE004
the required electric quantity for the electric vehicle to reach the destination is kWh;
Figure 471581DEST_PATH_IMAGE005
the unit of the electric quantity required by the power supply vehicle to reach the destination is kWh;
Figure 139192DEST_PATH_IMAGE006
the unit is kg for the total mass of the electric vehicle;
Figure 369316DEST_PATH_IMAGE007
the unit is kg for the total mass of the power supply train;gis the acceleration of gravity;fis the rolling resistance coefficient;
Figure 416294DEST_PATH_IMAGE008
is the air resistance coefficient;
Figure 48264DEST_PATH_IMAGE009
the frontal area of the electric car is given by
Figure 886776DEST_PATH_IMAGE010
；
Figure 869775DEST_PATH_IMAGE011
Is the windward area of the power supply vehicle and has the unit of
Figure 451935DEST_PATH_IMAGE010
；
Figure 938411DEST_PATH_IMAGE012
The lowest average speed required by the user of the electric vehicle,
Figure 213404DEST_PATH_IMAGE013
the minimum average speed required by a user of the power supply vehicle;
Figure 418120DEST_PATH_IMAGE014
for estimating the speed of the vehicle to be used when the amount of electricity required to reach the destination is measured in km/h, optionally
Figure 806901DEST_PATH_IMAGE014
The larger value of the minimum average vehicle speed required by the two vehicles;
Figure 147883DEST_PATH_IMAGE015
for-vehicle transmission systemThe overall efficiency;
Figure 593777DEST_PATH_IMAGE016
the total efficiency of a transmission system of the power supply vehicle is improved;
Figure 285789DEST_PATH_IMAGE017
driving the motor and the controller efficiency for the electric vehicle;
Figure 209752DEST_PATH_IMAGE018
to power the vehicle drive motor and its controller efficiency;
Figure 670820DEST_PATH_IMAGE019
the average discharge efficiency of the power battery of the electric vehicle is obtained;
Figure 287615DEST_PATH_IMAGE020
average discharge efficiency of power batteries of the power supply vehicle;
Figure 201345DEST_PATH_IMAGE021
the number of the whole journey of the electric vehicle is km;
Figure 931928DEST_PATH_IMAGE022
the unit of the distance is km.
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 comprises 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 comprises the following steps of determining the position range of the power supply vehicle terminal:
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 circle 1 A supply vehicle terminal within kilometers;
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 searched 2 And (4) power supply vehicle terminals in kilometer range.
4. The electric vehicle on-road power supply rescue method according to claim 3, wherein in S4, after the power supply vehicle terminal receives the information sent by the server in S3, whether the power supply vehicle meets the demand of the power supply vehicle is determined, 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 3, 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 as the power-demand vehicle, and does not need to charge the storage battery;
if the part of the travel route of the power demand vehicle is contained in the travel route of the power supply vehicle, and when the residual electric quantity of the power demand vehicle is enough to travel to the destination of the power demand vehicle after the power demand vehicle and the power supply vehicle finish traveling together, the power supply vehicle only provides the power required by the power demand vehicle for traveling at the same speed as 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.
6. The rescue method for electric vehicle direct-current power supply according to claim 5, characterized in that the first power supply vehicle power judgment condition is that the output power of the power supply vehicle is satisfied,
Figure 513082DEST_PATH_IMAGE023
in the formula:
Figure 35199DEST_PATH_IMAGE024
the unit of the output power of the power supply vehicle is kW;
Figure 701804DEST_PATH_IMAGE006
the total mass (kg) of the electric vehicle is required;
Figure 967569DEST_PATH_IMAGE007
the unit is kg for the total mass of the power supply train;gis the acceleration of gravity;fis the rolling resistance coefficient;
Figure 403229DEST_PATH_IMAGE008
is the air resistance coefficient;
Figure 96248DEST_PATH_IMAGE009
the frontal area of the electric car is given by
Figure 250148DEST_PATH_IMAGE010
；
Figure 334253DEST_PATH_IMAGE011
Is the windward area of the power supply vehicle and has the unit of
Figure 624420DEST_PATH_IMAGE010
；uThe unit is km/h for estimating the driving speed;
Figure 753919DEST_PATH_IMAGE015
the total efficiency of the transmission system of the electric vehicle is calculated;
Figure 129536DEST_PATH_IMAGE016
the total efficiency of the transmission system of the power supply vehicle is improved.
7. The rescue method according to claim 5, characterized in that the second determination method for determining the power of the power supply vehicle is to determine that the output power of the power supply vehicle is satisfied,
Figure 737104DEST_PATH_IMAGE025
in the formula:
Figure 147357DEST_PATH_IMAGE026
outputting power for a power supply vehicle, wherein the unit is kW;
Figure 182178DEST_PATH_IMAGE027
in order to achieve a high charging efficiency,
Figure 45092DEST_PATH_IMAGE028
the input power of the battery of the electric vehicle is needed;
Figure 459280DEST_PATH_IMAGE002
the unit of the residual electric quantity of the electric vehicle is kWh; the mileage of the same road section is
Figure 724039DEST_PATH_IMAGE029
；
Figure 195341DEST_PATH_IMAGE030
The electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
8. The electric vehicle on-road power supply rescue method according to claim 5, wherein the vehicle-needed 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 545551DEST_PATH_IMAGE031
in the formula:
Figure 494921DEST_PATH_IMAGE004
for vehicles requiring electricityThe unit of the required electric quantity for completing the whole process is kWh;
Figure 614187DEST_PATH_IMAGE005
the unit of the required electric quantity for completing the whole process is kWh;
Figure 256389DEST_PATH_IMAGE002
the unit of the residual electric quantity of the electric vehicle is kWh;
Figure 93895DEST_PATH_IMAGE003
the unit of the surplus electric quantity of the power supply vehicle is kWh;
Figure 849886DEST_PATH_IMAGE032
the unit is the unit mileage power consumption of the electric vehicle, and the unit is kWh/km;
Figure 823659DEST_PATH_IMAGE033
the unit of mileage and power consumption of the power supply vehicle 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 636763DEST_PATH_IMAGE034
in the formula:
Figure 961565DEST_PATH_IMAGE026
the unit of the output power of the power supply vehicle is kW;
Figure 252738DEST_PATH_IMAGE027
in order to achieve a high charging efficiency,
Figure 346596DEST_PATH_IMAGE028
the input power of the battery of the electric vehicle is needed;
Figure 330601DEST_PATH_IMAGE002
the unit of the residual electric quantity of the electric vehicle is kWh; mileage of the same road section is
Figure 877120DEST_PATH_IMAGE029
；
Figure 240493DEST_PATH_IMAGE030
The electric quantity required for the electric vehicle to run the mileage of two vehicles is achieved.
9. The rescue method for electric vehicle on-road power supply according to any one of claims 1-8, wherein determining whether the power supply vehicle meets the requirement of the power demand vehicle in S4 further comprises determining whether the output voltage of the power supply vehicle meets the requirement of the input voltage value of the power demand vehicle.
10. The electric vehicle on-road power supply rescue method according to any one of claims 1-8, wherein after the selected power supply vehicle terminal of S6 receives the contact information in 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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