WO2011071344A2

WO2011071344A2 - Method for controlling the charging of segments for an online electric vehicle

Info

Publication number: WO2011071344A2
Application number: PCT/KR2010/008863
Authority: WO
Inventors: 조동호; 정방철; 장우혁; 이종민; 김진규; 김영민; 전현우; 박미현
Original assignee: 한국과학기술원
Priority date: 2009-12-11
Filing date: 2010-12-10
Publication date: 2011-06-16
Also published as: WO2011071344A3

Abstract

The present invention relates to a method for controlling the charging of segments for an online electric vehicle. More particularly, the present invention relates to a method for controlling the charging of segments for an online electric vehicle, which controls an inverter with due consideration for the charging response time of segments so as to reduce the waste of electricity in a system that supplies electricity to the electric vehicle through magnetic induction using a power-supplying device including one or more segments buried under a road surface. According to a preferred embodiment of the present invention, the method for controlling the charging operation of segments for an online electric vehicle comprises the following steps: (a) receiving, from segments, information on the speed and position of the vehicle entering the range of the power-supplying device; and (b) controlling the charging / discharging timing of the current segment from which the vehicle is leaving and the next segment into the range of which the vehicle is to enter, in accordance with the information on the speed and position of the vehicle. The method of the present invention controls the operation timing of segments of the power-supplying device in accordance with the travel speed of the online electric vehicle with due consideration for the charging / discharging response delay characteristics of the segments, thereby improving efficiency and preventing a waste of electricity.

Description

Segment charge control method for online electric vehicle

The present invention relates to a segment charging control method for an electric vehicle, in particular, in a method of supplying power to an electric vehicle in a self-induced manner by a feeder composed of one or more segments buried under the road, considering the charging response time of the segment The present invention relates to a segment charging control method for an on-line electric vehicle that reduces power consumption by controlling an inverter.

Among alternative energy vehicles that are being developed to replace existing vehicles operating on fossil fuels that cause environmental pollution problems, electric vehicles equipped with battery modules are difficult to drive over long distances due to the limitation of battery capacity. There is a drawback to wait for a predetermined time by connecting to the power supply means. In addition, the distance that can be driven on a single charge is limited.

In order to overcome these disadvantages, a technology for increasing the capacity of the battery and increasing the efficiency of the charging system has been developed, but other problems occur that increase efficiency of the vehicle, decrease the efficiency, increase the unit cost, and shorten the battery life.

Accordingly, as an improved form of the aforementioned battery module-mounted electric vehicle, an on-line electric vehicle has been proposed to install a power feeding device under the road and charge the battery in a self-induction manner. Such a self-induction electric vehicle has the advantage of being driven by the charging power of the mounted battery when the power supply is interrupted from the power supply device.

In the initial feeding device, the power supply line was extended along the entire road, and the electric power was supplied to the entire feeding device, but recently, a method of implementing the power supply unit in a segment form, which is a predetermined unit module for feeding, has been proposed.

1 is a diagram schematically illustrating an example of a power feeding method between a current collector of a conventional online electric vehicle and a segment power feeding device embedded in a road to supply electric power to an electric vehicle.

First, the current collector of the conventional on-line electric vehicle is located at the center lower end of the electric vehicle 100 and has a square shape of about 1/3 of the length of the vehicle as shown. In addition, the power feeding device includes one or more power feeding segments 30 for generating a magnetic field as a unit module, and includes a vehicle detection sensor 32 for detecting a vehicle entering a road above the power feeding segment 30, and a power supply from a power source. And a switch 36 for transferring or interrupting the power to the feed segment 30.

According to the above-described configuration, in the conventional electric power feeding method of the online electric vehicle, the switch of the electric power feeding segment 32a is connected by the vehicle detection sensor 32a of the electric power feeding segment 36a which detects the electric vehicle 10 and the magnetic field ( 20) occurs and the electric vehicle 10 is powered. The switch of each of the power feeding segments 36b through which the electric vehicle 10 passes is in an 'ON' state when the electric vehicle 10 enters the corresponding segment, thereby supplying power to the electric vehicle 10 and leaving it. When it is in 'OFF' state, it cuts off power supply.

In this case, since the power supply segment is switched by the vehicle sensor according to the time when the vehicle enters and exits, 'ON' or 'OFF' starts, a response delay time occurs according to hardware characteristics. This response time delay is due to the internal circuit capacitor charge / discharge characteristics of the inverter to supply the power, the internal switch method, the vehicle detection sensor error, and the time required to transmit and receive the inverter ON / OFF control signal. As an example, when the internal switch of the inverter is an electronic switch, it takes several tens of us, but in the case of a mechanical switch, it takes several hundred ms. If the mechanical switch is applied, the time when the power supply segment is 100% at 'ON' operation is about 2 seconds, and when it is 'OFF' operation, it takes about 1 second to complete discharge.

That is, inefficiency due to the charge / discharge response delay time occurs according to the power segment length and the vehicle moving speed. If the power supply segment is 'ON' after entering the vehicle, the efficiency can be reduced because the vehicle can pass through the power supply segment before the power supply voltage reaches 100%. There is a problem that the energy loss occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object thereof is to overcome efficiency degradation and power waste caused by delayed response of charging and discharging segments of an on-line electric vehicle.

In order to achieve the above object, the segment charging control method of an on-line electric vehicle according to a preferred embodiment of the present invention, (a) receiving the speed and location information of the vehicle entering from the segment; And (b) controlling the charge / discharge timing of the segment into which the vehicle is currently advancing and the next segment to be entered in correspondence with the speed and the position information.

The step (b) may include the steps of: (b1) discharging the advancing segment prior to the full entry of the vehicle, according to the discharge response time of the segment; And (b2) charging the segment to be entered next before entering the vehicle, according to the charging response time of the segment.

In order to achieve the above object, the segment charging control method of a plurality of online electric vehicles according to an embodiment of the present invention, (a) of the plurality of vehicles, N (N is a natural number of one or more) according to the entry of the front vehicle Starting to charge the segment; (b) receiving the speed and location information of the rear vehicle from the N-th segment; (c) receiving a discharge request according to advance of the front vehicle from the N-th segment; And (d) determining whether the N-th segment is discharged in response to the speed and position information of the front vehicle and the rear vehicle.

Prior to the step (a), receiving speed and position information of the front vehicle from an N + 1th segment; And charging the N-th segment in response to the speed and the position information.

The step (d) may include: (d1) maintaining the charged state of the N-th segment when it is determined that the rear vehicle enters before the N-th segment starts to discharge and is completely discharged; Or (d2) if it is determined that the rear vehicle enters after the time point at which the Nth segment starts to discharge and is completely discharged, the Nth third

Characterized in that the discharge step.

After the step (d2), according to the charging response time of the N-th segment, further comprising the step of charging the segment to be entered next before entering the rear vehicle.

In order to achieve the above object, according to a preferred embodiment of the present invention, the segment charging control method of an on-line electric vehicle according to a preferred embodiment of the present invention includes (a) defining a front vehicle, which is the first vehicle among the vehicles forming the cluster, as a header vehicle step; (b) initiating charging by the Nth segment (where N is a natural number of 1 or more) as the header vehicle enters; (c) receiving speed and position information of a next vehicle, which is the next vehicle of the header vehicle, among the vehicles in the cluster from an N-1 th segment; (d) receiving a discharge request according to advance of the header vehicle from the N-th segment; And (e) determining whether to discharge the N-th segment in response to the speed and position information of the header vehicle and the next vehicle.

The cluster may be a group of vehicles that are determined according to previously registered information between each vehicle, a vehicle ID, or a moving speed of each vehicle.

Before the step (a), receiving speed and position information of the header vehicle from an N + 1th segment; And the N-th segment corresponding to the speed and location information.

Charging the process.

The step (e) may include: (e1) maintaining the state of charge of the N-th segment when it is determined that the next vehicle is entered before the N-th segment starts to discharge and is fully discharged; Alternatively, (e2) if it is determined that the next vehicle enters after a time point at which the Nth segment starts to discharge and is completely discharged, the Nth segment is discharged.

After the step (e2), the charging response time of the N-th segment, characterized in that it further comprises the step of charging the segment to be entered next before entering the next vehicle.

According to a preferred embodiment of the present invention, by controlling the operation time of the power supply segment according to the moving speed of the online electric vehicle in consideration of the power supply segment charge and discharge response delay characteristics, there is an effect that can improve the efficiency and prevent power consumption .

1 is a view schematically illustrating an example of a power feeding method between a current collector of a conventional online electric vehicle and a segment type power feeding device embedded in a road and supplying power to two electric vehicles.

2 is a view for explaining a segment charging control method and apparatus for an electric vehicle according to a first embodiment of the present invention.

3 is a graph illustrating a relationship between magnitudes of voltages according to time for defining charge and discharge response time in the first embodiment of the present invention.

4 is a view showing a segment filling method according to an embodiment of the present invention.

5 is a view for explaining a segment charging control method and apparatus for an electric vehicle according to a second embodiment of the present invention.

FIG. 6 is a graph showing a relationship between magnitudes of voltages according to time for defining a continuous passage time in a second embodiment of the present invention.

7 is a diagram illustrating a segment filling method according to a second embodiment of the present invention.

8 is a view for explaining a segment charging control method and apparatus for an electric vehicle according to a third embodiment of the present invention.

Hereinafter, a segment charging control method and apparatus for an electric vehicle according to a preferred embodiment of the present invention will be described with reference to the drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. On the basis of the principle that can be defined should be described in the meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

In the present embodiment, the description will be made of a case where one vehicle runs alone (mode 1), a plurality of vehicles run continuously (mode 2), and a plurality of vehicles form a cluster (mode 3). do.

Mode 1: When one vehicle is driving alone

As illustrated, when one electric vehicle 100 is driving on a road where the segment type feeder 300 is embedded at a speed of Vi, the current collector is generated when the switch 360 of the feed segment is connected. Power is supplied by the magnetic field 200.

Here, the electric vehicle 100 includes an information transceiver 120 for transmitting and receiving the power supply segment and the power related information. The information transmitted by the information transceiver 120 includes ID of a power feeding segment transmitted to the vehicle, 'ON / OFF' status information, vehicle ID received from the vehicle, vehicle speed information, and the like. The power supply segment 300 receives the above-described information from the information transceiver 120 and provides the power supply segment to the inverter 400 that controls the power supply, and the inverter 400 responds to the provided information. ) And a switch 'ON' command to the feed segment 362 that is expected to enter later, and also a switch 'OFF' command to the feed segment 367 into which the vehicle is currently advancing.

In the control of the power supply segment, the charge / discharge response time of the segment as well as the aforementioned speed Vi of the vehicle is considered. The charge / discharge response time described above is defined as the voltage 100% attainment time of the segment after the inverter 'ON' command and the voltage 0% fall time at the segment after the 'OFF' command. Figure 3 is a graph of the relationship between the magnitude of the voltage over time defining the charge and discharge response time. Therefore, for the segment where the vehicle is expected to enter the next, the vehicle starts to charge the next segment in advance so that the voltage of the segment can achieve 100% immediately after the vehicle enters.

4 is a diagram illustrating a segment charging method according to a first embodiment of the present invention. As shown in the drawing, a segment {k (k is a natural number of 1 or more)} is a vehicle ID, a moving speed, and a segment from the electric vehicle 100. If the location information is provided (S310), the k-th segment provides the received information to the inverter 400 (S320). Thereafter, the inverter 400 controls to charge the N (N is a natural number of 1 or more) th segment (k + N) in response to the transmitted information (S330).

모드 2 : 복수의 차량이 연속으로 주행하는 경우Mode 2: When a plurality of vehicles are running continuously

As shown in the drawing, when a plurality of

electric vehicles

100i and 100j are traveling on a road in which segment-type feeders are embedded at intervals of d _ij , respectively, at a speed of V _i and V _j , the current collector may switch the feed segment. When connected, it is powered by the magnetic field generated by the

feed segments

334 and 336.

At this time, when two consecutive vehicles pass through the segment, the segment control should be performed in consideration of the vehicle speed and the response time before and after the segment charging and discharging, as well as the distance between the vehicles. In detail, the power supply segment 334, which is in the 'ON' state according to the entry of the front vehicle 100i, enters the segment according to the continuous passage time since the rear vehicle 100j is continuously entered. It is efficient to remain 'ON' even after entry.

This applies equally to the intermediate switches 335. The above-described continuous passage time is defined as the time taken for the continuous rear vehicle to enter the segment after the 'OFF' command to the segment charging the front vehicle when the electric vehicle moves continuously. 6 is a graph illustrating a relationship between the magnitudes of voltages according to time for defining the continuous passage time.

Referring to FIG. 6, the discharge response time t _d , which is a time at which the front vehicle enters 2 and the power supply segment starts to be discharged and is completely discharged, and the charge response that the power supply segment starts charging after the rear vehicle enters after a predetermined time The time t _c and the continuous passage time τ, which is the time of full charge after discharge, are shown. That is, if the continuous passage time (τ) is less than the charge / discharge response time (t _c + t _d ), it means that the rear vehicle enters before the full discharge of the segment. Therefore, the feeding segment is kept in the “ON” state. If the time (τ) is greater than the charge / discharge response time (t _c + t _d ), it means that the rear vehicle enters after the full discharge of the corresponding segment. Therefore, the predetermined time (τ-t _c ) after switching the feed segment to 'OFF' state It is efficient to switch it back to the ON state after the elapsed time.

Therefore, referring back to FIG. 5, the inverter determines 'ON / OFF' of each segment at time t + τ based on the moving speed V _i of the front vehicle passing through each segment at time t and the distance d _ij between the front and rear vehicles. To control. Here, when the moving speed of each vehicle is the constant speed, the following Equation 1 is satisfied.

Equation 1

In addition, when the moving speed of the vehicle is equivalent speed, the following equation (2) is satisfied.

Equation 2

(Where τ> 0)

Therefore, the inverter is then when the τ value is less than t _c + t _d values continue to 'ON' state of the segment and, when the τ value greater than t _c + t _d values control the segment to 'OFF' state When the rear vehicle enters, control the segment to 'ON' again.

That is, when it is determined that the rear vehicle enters before the time when the segment starts to discharge and is fully discharged as the front vehicle enters, the inverter maintains the state of charge of the segment 334, or If it is determined that the rear vehicle enters after a time point at which the segment starts to discharge and is completely discharged, the segment 334 starts to discharge, and according to the charge response time of the segment, the segment into which the rear vehicle advances ( 336 begins to discharge and charges the next segment 335 to enter before entering.

FIG. 7 is a diagram illustrating a segment charging method according to a second embodiment of the present invention. First, the front vehicle 100i enters the N-th segment (S610), and the N-th segment is the rear vehicle 100j. When receiving the speed information (V _j (t)) (S620), the N-th segment reports the entry of the front vehicle (100i) to the inverter 400 (S630), N-1 segment is the speed information (V _j (t) is reported to the inverter 400 (S640). Then, when the vehicle 100i advances, when the N-th segment requests the inverter to discharge (S650), the inverter 400 compares the value of τ with the value of t _c + t _d (S660), τ If the value is smaller than the value of t _c + t _d , the segment is 'ON' (S662). If the value of τ is greater than the value of t _c + t _d , the segment is controlled to the 'OFF' state. When the vehicle enters again, the segment is controlled to the 'ON' state (S664).

모드 3 : 다수의 차량이 군집을 형성하여 주행하는 경우Mode 3: When a large number of vehicles are driving in a cluster

As shown, a plurality of

cars

100i, 100j, 100k forming a cluster travel at a speed of V _i , V _j , and V _k , each of which has a segment-type feeder embedded at intervals d _ij and d _jk , respectively. If so, each vehicle is powered by the magnetic field generated by the

feed segments

434, 436, 438, similar to the embodiments described above.

Here, the clusters formed by the plurality of vehicles may be formed according to pre-registered information between each vehicle, or may be determined as a cluster based on vehicle ID and moving speed information in the central control system connected to the inverter. Can be. In the case of such group-driven electric vehicles, the head vehicle is set as the header of the cluster in the vehicle group, and the feed segment is controlled to be equally applied to all the vehicles based on the header vehicle and the next vehicle following the header vehicle. That is, according to the charge / discharge timing of the segment 434 into which the header vehicle enters and the segment 436 into which the next vehicle enters, the subsequent segments 438 are controlled in the same manner.

Suppose all vehicles in the same cluster have the same speed {V _i (t) = V _j (t) = V _k (t)} and equal distances {d _ij (t) = d _jk (t)} , The constant velocity satisfies Equation 3 below.

Equation 3

In addition, when the moving speed of the vehicle is the equivalent speed, the following equation (4) is satisfied.

Equation 4

(Where τ> 0)

Therefore, the inverter is then when the τ value is less than t _c + t _d values continue to 'ON' state of the segment and, when the τ value greater than t _c + t _d values control the segment to 'OFF' state According to the charging response time of the segment, the next segment to charge before entering the vehicle is charged. The segment charging method according to the third embodiment corresponds to the charging method according to the above-described second embodiment except that the segment charging method is based on the speed of the header vehicle.

As mentioned above, although this invention was demonstrated by the limited Example and drawing, this invention is not limited by this and this invention and the technical thought, and the following by those of ordinary skill in the art to which this invention belongs. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Claims

As a segment charging control method for an online electric vehicle,

(a) receiving speed and position information of a vehicle entering from a segment; and

(b) controlling charging and discharging timings of the segment into which the vehicle is currently advancing and the next segment to be entered according to the speed and location information;

Segment charge control method for an online electric vehicle comprising a.
The method of claim 1,

Step (b) is,

(b1) discharging the segment that is advanced before the vehicle fully advances, according to the discharge response time of the segment; And,

and (b2) charging the segment to be entered next before the vehicle enters according to the charging response time of the segment.
As a segment charging control method for a plurality of online electric vehicles,

(a) starting charging of the N (N is a natural number of 1 or more) segments according to the entry of the preceding vehicle among the plurality of vehicles;

(b) receiving the speed and location information of the rear vehicle from the N-th segment;

(c) receiving a discharge request according to advance of the front vehicle from the N-th segment; And,

(d) determining whether the N-th segment is discharged in response to the speed and location information of the front vehicle and the rear vehicle;

Segment charge control method for an online electric vehicle comprising a.
The method of claim 3, wherein

Before step (a) above,

Receiving speed and location information of the front vehicle from an N + 1th segment; And,

Charging the N-th segment in response to the speed and location information

Segment charging control method for an online electric vehicle comprising a.
The method of claim 3, wherein

Step (d) is,

(d1) maintaining the charged state of the N-th segment if it is determined that the rear vehicle enters before the N-th segment starts to discharge and is fully discharged; or,

(d2) discharging the N-th segment if it is determined that the rear vehicle enters after a point where the N-th segment starts to discharge and is completely discharged;

Segment charge control method for an online electric vehicle, characterized in that.
The method of claim 5,

After the step (d2),

Charging a segment to be entered next before entering the rear vehicle according to the charging response time of the N-th segment;

Segment charge control method for an online electric vehicle further comprising a.
As a segment charging control method for clustered online electric vehicles,

(a) defining, as a header vehicle, the front vehicle that is the most leading vehicle among the vehicles forming the cluster;

(b) initiating charging by the Nth segment (where N is a natural number of 1 or more) as the header vehicle enters;

(c) receiving speed and position information of a next vehicle, which is the next vehicle of the header vehicle, among the vehicles in the cluster from an N-1 th segment;

(d) receiving a discharge request according to advance of the header vehicle from the N-th segment; And,

(e) determining whether the N-th segment is discharged in response to the speed and location information of the header vehicle and the next vehicle;

Segment charge control method for an online electric vehicle comprising a.
The method of claim 7, wherein

The cluster is,

And a group of vehicles determined according to previously registered information, vehicle ID, or moving speed of each vehicle.
The method of claim 7, wherein

Before step (a) above,

Receiving speed and location information of the header vehicle from an N + 1th segment; And,

Charging the N-th segment in response to the speed and location information

Segment charging control method for an online electric vehicle comprising a.
The method of claim 8,

Step (e),

(e1) maintaining the state of charge of the N-th segment when it is determined that the next vehicle enters the time point before the N-th segment starts to discharge and is completely discharged; or,

(e2) if it is determined that the next vehicle enters after a time point at which the Nth segment starts to discharge and is completely discharged, the Nth segment is discharged to the on-line electric vehicle segment charging control method.
The method of claim 10,

After the above step (e2),

Charging a segment to be entered next before the next vehicle is entered according to the charge response time of the N-th segment;

Segment charge control method for an online electric vehicle further comprising a.