KR20190057471A - Method for providing charging route of electric car - Google Patents

Abstract

The present invention relates to a method for providing an optimum charging route of an electric vehicle and, more specifically, to a method for guiding an optimum charging route which is to the charging station located on the final destination by the minimum charging completion time and a travelling route using the remaining battery capacity of the electric vehicle, and can charge a battery while reducing the waiting time at a charging station in consideration of availability of the charging station located near the electric vehicle requiring charging and the charging waiting time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a method of providing an optimal charging path for an electric vehicle, and more particularly, to a charging method for charging an electric vehicle, which reduces the waiting time at a charging station in consideration of availability of a charging station located near an electric vehicle And a method for guiding an optimal charging path to a charging station located on a final destination with a minimum charging completion time and a traveling path as the remaining battery amount of the electric vehicle.

The global automobile market paradigm is changing from an internal combustion engine to an eco-friendly car including an electric car as global warming and resource depletion strengthen regulation of the automobile sector to suppress greenhouse gas emission.

An electric vehicle has been developed and used as one of such eco-friendly cars. Generally, an electric vehicle mounts a battery as a driving power source, and travels by driving the motor using the battery as a power source.

When the electric vehicle is running or regenerative braking, the electric power is generated by the motor to charge the battery. However, since the battery discharges more than the charged amount during driving, the battery must be charged after a certain distance and time.

With the commercialization of electric vehicles, a plug-in type in which a battery is directly charged in a limited space such as a home or a laboratory has been introduced. However, in a situation such as long-distance driving, a charging station is inevitable.

Although the infrastructure of charging stations for charging electric vehicles is not yet fully established, in the future, charging stations for electric vehicles will have to be built in many places such as gas stations.

Taking this into consideration, currently electric vehicles are being applied to a system that guides the location of charging stations in the vicinity when a battery is required to be charged.

Hereinafter, a conventional charging station guidance method for charging a battery of an electric vehicle will be described with reference to FIG.

In the conventional charging station guiding method, when the charging state (SOC) of the battery is monitored and the charging is required, all charging stations within a specific radius are displayed by comparing the existing charging station location with the current location, A unidirectional guidance algorithm that guides the user to a nearby charging station is applied.

First, a battery management system (BMS: Battery Management System) 1 for managing the charging, discharging and charging states of a battery mounted on an electric vehicle monitors the state of charge of the battery and generates a vehicle control unit (VCU) ).

Subsequently, when the monitoring signal of the battery management system 1 is received in the vehicle control unit 3 and it is judged that the remaining capacity of the battery is insufficient to charge the battery, the display means 5 including navigation, AVN (audio + video + navigation integrated) To display the charging station location information.

Therefore, by detecting the charging station position information in the navigation of the display means 5 and displaying the detected charging station position information, the driver is guided to the nearby charging station position.

When the high voltage battery mounted on the electric vehicle falls below a certain state of charge (SOC), the charging facility within a specific radius from the current position is displayed on the display screen in the vehicle in cooperation with the navigation when the driver requests it , The driver can be guided to the nearest charging station.

However, due to the fact that the charging station infrastructure for electric vehicles is not properly constructed, the number of charging stations is limited, and the time required for one charging period is long (30 seconds for fast charging and 6 hours or more for fast charging) Therefore, when the vehicles are driven at the same time at a specific charging station, a very uncomfortable situation may occur that requires a long waiting time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a charging method and a charging method for charging a charging station, And to provide a method for guiding an optimized charging path.

It is a further object of the present invention to provide an electric vehicle in which the electric vehicle is charged with the minimum amount of battery remaining in consideration of the remaining battery amount of the electric vehicle, the final destination, and the charging completion time according to the charging method (DC car demo, DC combo, AC3 phase) And a method of guiding an optimum charging path to a charging station located on a final destination with a time and a moving route.

In order to accomplish the object of the present invention, there is provided an optimum charging path guiding method for an electric vehicle, comprising: receiving charging request information including a current position, a remaining battery amount, and a final destination from an electric vehicle; The method comprising the steps of: searching the charging station information and the road information at a time point; determining a candidate charging station to which the electric vehicle can be moved based on the remaining battery amount and the charging station information; Calculating the total travel distance from the current location of the candidate charging station to the final destination, calculating the travel time from the candidate charging station to the final destination, the waiting time of the candidate charging station, And the total distance traveled by the candidate charging stations, Based on the steps and, the evaluation value for calculating a candidate station-specific evaluation values on the basis of the time of determining the recommended charging station candidate stations, and is characterized in that it comprises the step of providing information about the recommended charging station.

Preferably, the evaluation value C is calculated by the following equation (1)

[Equation 1]

Here, S _total represents the total travel distance of the electric vehicle, T _total represents the charge completion time, and λ and γ are the weights assigned to the total travel distance and the charge completion time, respectively.

Preferably, the method of providing an optimal charging path of an electric vehicle according to the present invention includes the steps of: receiving a reservation request message from an electric vehicle; receiving a reservation request message based on a travel time from a current location of the electric vehicle to a recommended charging station; Calculating an expected arrival time at which the electric vehicle reaches the recommended charging station and allocating to the electric vehicle any one of a plurality of chargers disposed at the charging station at the estimated arrival time, And transmitting the reservation completion message to the electric vehicle.

The charging path guiding method of an electric vehicle according to the present invention is a method of guiding the charging path of an electric vehicle, considering the availability of a charging station located near an electric car requiring charging and the charging waiting time, thereby reducing the waiting time at the charging station, Thereby guiding the optimized charging path of the vehicle.

Meanwhile, the charging path guiding method of an electric vehicle according to the present invention takes into account all of the remaining battery amount of the electric vehicle, the final destination, and the charging completion time according to the charging method (DC car demo, DC combo, AC3 phase) It is possible to guide the minimum charge completion time and the optimum charge path to the charging station located on the final destination with the travel path as the remaining battery amount.

Further, according to the present invention, the charging route guidance method for an electric vehicle can reserve a charging station in consideration of a moving time from the current position of the electric vehicle to the recommended charging station, so that the user can charge the battery of the electric vehicle without waiting a long waiting time can do.

1 is a view for explaining an example of a conventional electric vehicle charging path guide device.
2 is a view for explaining an electric vehicle charging route guidance system according to the present invention.
3 is a functional block diagram illustrating a route guidance server according to an embodiment of the present invention.
4 is a flowchart illustrating a charging path guidance method for an electric vehicle according to an embodiment of the present invention.

It is noted that the technical terms used in the present invention are used only to describe specific embodiments and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be construed in a sense generally understood by a person having ordinary skill in the art to which the present invention belongs, unless otherwise defined in the present invention, Should not be construed to mean, or be interpreted in an excessively reduced sense. In addition, when a technical term used in the present invention is an erroneous technical term that does not accurately express the concept of the present invention, it should be understood that technical terms can be understood by those skilled in the art.

Furthermore, the singular expressions used in the present invention include plural expressions unless the context clearly dictates otherwise. In the present invention, terms such as " comprising " or " comprising " and the like should not be construed as encompassing various elements or various steps of the invention, Or may further include additional components or steps.

It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

2 is a view for explaining an electric vehicle charging route guidance system according to the present invention.

2, a route guidance server 100, an electric vehicle 10, and a plurality of electric vehicle charging stations 50 are connected to the network 30. Here, the network 30 transmits and receives data between the route guidance server 100 and the electric vehicle 10, transmits and receives data between the charging station 50 and the route guidance server 100, Various types of wired or wireless networks capable of transmitting and receiving data between the base stations 50 can be used.

Here, the electric vehicle 10 includes a battery that uses electricity as a power source and provides electric energy to store and store electric energy. When the electric vehicle wants to charge the battery based on the remaining charge of the battery, (100) to request information about the optimal charging path.

When the charging route information is requested from the electric vehicle 10, the route guidance server 100 transmits information about the current position of the electric vehicle 10, the remaining charge amount of the battery, the road situation information, In real time. Using this information, the route guidance server 100 determines whether or not a candidate charging station that can move to the remaining battery charge amount of the electric vehicle through the charging station and the final destination among the candidate charging stations, Is determined as a recommended charging station, and provides information on the recommended charging station determined to the electric vehicle (10).

According to the field to which the present invention is applied, data can be transmitted and received to and from the route guidance server 100 through the interface provided in the electric vehicle 10. However, when a user terminal such as a smart phone, a PDA, Receives information on the remaining battery charge of the electric vehicle 10 via the local area network from the vehicle, and transmits information on the current location and the final destination of the electric vehicle to the route guidance server 100. [

On the other hand, when receiving the reservation request message from the electric vehicle 10, the route guidance server 100 considers the estimated arrival time at which the electric vehicle 10 reaches the recommended charging station, Assigns one charger to the electric vehicle, and transmits a reservation completion message including the assigned charger identifier to the electric vehicle 10.

3 is a functional block diagram illustrating a route guidance server according to an embodiment of the present invention.

3, when the charging request message including the current location, the remaining charge of the battery, and the final destination is received from the electric vehicle through the transmission / reception unit 110, the charging station management unit 150 transmits a charging request message The mobile station management unit 170 requests the current charging station information of the surrounding charging station from the surrounding charging station and receives the information about the moving time and the moving distance from the current location of the electric car to the surrounding charging station and the final destination (Not shown) to the road situation information providing server (not shown).

The recommended charging station determination unit 130 calculates the moving distance to the surrounding charging station based on the current position of the electric vehicle and moves to the remaining battery charging amount of the electric vehicle among the peripheral charging stations based on the calculated travel distance and remaining battery charging information of the battery Determine possible candidate stations.

On the other hand, the recommended charging station determining unit 130 calculates the total moving distance from the current position of the electric vehicle to the final destination through the candidate charging station on the basis of the moving distance from the candidate charging station to the final destination, And determines a recommended charging station among a plurality of candidate charging stations.

The recommended charging station determination unit 130 provides information on the determined recommended charging station to the electric vehicle through the transmission / reception unit 110. The reservation unit 180 receives the reservation request message of the recommended charging station from the electric vehicle through the transmission / , One charger among the plurality of chargers is allocated in consideration of the usage status information of the plurality of chargers disposed in the recommended charging station, the expected usage time, and the estimated arrival time of the electric vehicle. Information on the assigned charger, the electric vehicle identifier or the user identifier, and the estimated time of use for the assigned charger, and the like are stored and managed in the charging station management DB.

On the other hand, the reservation unit 180 controls transmission to the electric vehicle through the transmission / reception unit 110 of the reservation completion message including the identifier of the recommended charger.

4 is a flowchart illustrating a charging path guidance method for an electric vehicle according to an embodiment of the present invention.

 Referring to FIG. 4, it is determined whether a charge request message is received from the electric vehicle (S110).

When the charging request message is received, the charging station information and the road information of the surrounding charging station are searched based on the reception time of the charging request message, and information about the charging station information and the road information is received (S120). Preferably, the charging station information includes information on whether or not the charger is in use, an expected time of use, and the like, and the road information includes a current position of the electric vehicle, a moving distance to the nearby charging station, It can receive from the server.

A candidate charging station that can be moved to the remaining battery charge of the electric vehicle among peripheral charging stations is determined (S130) based on the current position of the electric vehicle, the moving distance to the surrounding charging station, and the remaining battery charging amount of the electric vehicle.

A total travel distance from the present location of the electric vehicle to the final destination via the candidate charging station is calculated based on the current location of the electric car, the travel distance to the candidate charging station, and the travel distance from the candidate charging station to the final destination (S150) The charging completion time is calculated from the moving time from the current position of the car to the candidate charging station, the travel time from the candidate charging station to the final destination, the waiting time of the candidate charging station, and the charging time according to the type of the electric vehicle (S160).

An evaluation value is calculated for each candidate charging station based on the calculated total travel distance and the total charging completion time (S170), and the evaluation value of the candidate charging station is calculated as shown in the following equation (1).

Preferably, the evaluation value C is calculated by the following equation (1)

[Equation 1]

Here, S _total denotes the total travel distance of the electric vehicle, T _total denotes the charge completion time, and λ and γ are the weights assigned to the total travel distance and the charge completion time, respectively. The basic weight values of λ and γ can be set to 0.5 by considering the total travel distance and the charge completion time at the same ratio. However, when a route that minimizes the total travel distance is requested, λ = 1 and γ = When a path that minimizes only the required time is requested, λ = 0 and γ = 1 can be set. According to the field to which the present invention is applied, λ and γ can be set differently, which is within the scope of the present invention.

The charging station having the lowest evaluation value is determined as the recommended charging station based on the evaluation value for each candidate charging station, and information on the determined recommended charging station is provided to the electric vehicle (S190).

The above-described embodiments of the present invention can be embodied in a general-purpose digital computer that can be embodied as a program that can be executed by a computer and operates the program using a computer-readable recording medium.

The computer-readable recording medium may be a magnetic storage medium (e.g., ROM, floppy disk, hard disk, etc.), an optical reading medium (e.g. CD ROM, Lt; / RTI > transmission).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Electric vehicle 30: Network
50: charging station 100: route guidance server
110: Transmitting / receiving unit 130: Recommended charging station determination unit
150: charging station management unit 170:
180: Reservation unit 190: Charging station management DB

Claims (3)

A method for guiding an optimized charging path of an electric vehicle in a charging path guide server,
Receiving charge request information from the electric vehicle, the charge request information including a current location, a remaining battery amount, and a final destination;
Searching charging station information and road information at the time of receiving the charging request information;
Determining a candidate charging station to which the electric vehicle can be moved based on the remaining battery amount and charging station information;
Calculating a total travel distance from a current location of the electric vehicle to the final destination via the candidate charging station based on the travel distance from the candidate charging station to the final destination;
Calculating a charge completion time from a travel time from the current position of the electric vehicle to the candidate charging station, a travel time from the candidate charging station to the final destination, a waiting time of the candidate charging station, and a charging time according to the type of the electric vehicle ;
Calculating an evaluation value for each of the candidate charging stations based on the total travel distance and the charging completion time for each candidate charging station; And
Determining a recommended charging station among the candidate charging stations based on the evaluation value, and providing information on the recommended charging station. 2. The method according to claim 1, wherein the evaluation value (C) is calculated by the following equation (1)
[Equation 1]

Here, S _total denotes the total travel distance of the electric vehicle, T _total denotes the charge completion time, and? And? Are weights assigned to the total travel distance and the charge completion time, respectively. Route guidance method. The method as claimed in claim 2, wherein the optimum charging path guiding method of the electric vehicle
Receiving a reservation request message from the electric vehicle;
And calculating an estimated arrival time at which the electric vehicle reaches the recommended charging station based on the travel time from the current position of the electric vehicle to the recommended charging station when the reservation request message is received, Allocating any one of a plurality of chargers to the electric vehicle;
Further comprising the step of transmitting a reservation completion message including the charger identifier assigned to the electric vehicle to the electric vehicle.

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