WO2014156656A1

WO2014156656A1 - Electric vehicle and parking assist system for electric vehicle

Info

Publication number: WO2014156656A1
Application number: PCT/JP2014/056521
Authority: WO
Inventors: 木下　拓哉; 研吾毎川
Original assignee: 日産自動車株式会社
Priority date: 2013-03-29
Filing date: 2014-03-12
Publication date: 2014-10-02
Also published as: JP5987972B2; JPWO2014156656A1

Abstract

This electric vehicle is equipped with: a search coil (36) positioned so as to cover the surface of the vehicle coil (35) which faces the road surface; a voltage detection control unit (37) for detecting the voltage generated by the search coil (36); a vehicle-side control unit (39) for detecting the relative position of the vehicle coil (35) in relation to a ground coil (14), on the basis of the voltage detected by the voltage detection control unit (37); and a display unit (42) for displaying the position information detected by the vehicle-side control unit (39).

Description

Electric vehicle and electric vehicle parking support system

The present invention relates to an electric vehicle and a parking assistance system for an electric vehicle, and more particularly, to a technique for assisting parking so that a vehicle coil is in a predetermined position with respect to a ground coil.

As electric vehicles become widespread, non-contact charging devices that charge power to batteries of electric vehicles without connecting power supply devices and electric vehicles using plugs or the like have been proposed. In such a non-contact charging device, it is necessary to park the electric vehicle at an appropriate position when charging the battery. That is, the non-contact charging device needs to perform power transmission in a state where the ground coil provided on the road surface of the parking space and the vehicle coil provided on the bottom surface of the electric vehicle face each other. Therefore, if a positional deviation occurs between the coils, the power transmission efficiency is lowered, and thus the accuracy of the parking position is required.

Therefore, Patent Document 1 discloses that a camera is mounted under the floor of the vehicle, an image captured by the camera is displayed on a monitor in the vehicle, and the driver performs alignment while looking at the image. Has been.

JP 2011-182608 A

However, since the conventional example disclosed in Patent Document 1 described above is configured to support parking by an image of a camera installed under the floor of the vehicle, there is a problem that accurate positioning is not easy.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an electric machine capable of assisting in an operation of easily parking the vehicle at a desired position. The object is to provide a parking support system for automobiles and electric cars.

In order to achieve the above object, an electric vehicle according to an aspect of the present invention includes a search coil provided so as to cover a surface of the vehicle coil facing the road surface, and excitation power supplied to the ground coil. Has a voltage detector for detecting a voltage generated in the search coil. Further, the electric vehicle displays a position detection unit that detects a relative position of the vehicle coil with respect to the ground coil based on the voltage detected by the voltage detection unit, and a display that displays the position information detected by the position detection unit. A part.

FIG. 1 is a block diagram showing the configuration of the parking assistance system according to the first embodiment of the present invention. FIG. 2 is an explanatory diagram showing a positional relationship between the ground coil and the vehicle coil used in the parking assist system according to the first embodiment of the present invention. FIG. 3 is an explanatory diagram showing a detailed configuration of a search coil used in the parking assistance system according to the first embodiment of the present invention. FIG. 4 is a block diagram showing a detailed configuration of the voltage detection control unit in the parking assistance system according to the first embodiment of the present invention. FIG. 5 is an explanatory diagram showing a positional relationship between the ground coil and the vehicle coil in the parking assistance system according to the first embodiment of the present invention. FIG. 6 is an explanatory diagram showing a voltage generation region generated according to the positional relationship between the ground coil and the vehicle coil in the parking assistance system according to the first embodiment of the present invention. FIG. 7 is a diagram illustrating a display example of the vehicle unit icon and the ground coil unit icon in the parking support system according to the first embodiment of the present invention. FIG. 8 is an explanatory diagram showing a positional relationship between the voltage generation region and the ground coil in the parking assistance system according to the first embodiment of the present invention. FIG. 9 is a flowchart showing a processing procedure of a parking support operation by the parking support system according to the first embodiment of the present invention. FIG. 10 is a block diagram showing a configuration of a parking assistance system according to the second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Description of First Embodiment]
FIG. 1 is a block diagram showing the configuration of the parking assistance system according to the first embodiment of the present invention. As shown in FIG. 1, the parking assist system 100 includes a vehicle-side device 101 mounted on an electric vehicle (hereinafter referred to as “vehicle”) and a power supply device 102 that is installed on the ground side and supplies power to the vehicle. It is configured. And the parking assistance system 100 assists the parking operation by the driver so that the vehicle stops at a desired position in the parking space. That is, when the battery mounted on the vehicle is charged using the non-contact charging device, if the vehicle parking position is deviated, the power transmission efficiency is lowered. Prevent misalignment.

A power supply apparatus 102 shown in FIG. 1 desires a DC power supply 11 that rectifies AC power output from a commercial power supply 10 (for example, 100 V, 50 Hz) to obtain DC power, and DC power output from the DC power supply 11. Between the inverter 12 (electric power supply unit, electric power supply means) for converting the AC power into the frequency of the power, the ground coil 14 for power transmission provided on the road surface of the parking space where the vehicle is parked, and the ground coil 14 And a resonance capacitor 13 that resonates power. The power supply apparatus 102 also inputs a voltage / current / temperature sensor 16 that detects the voltage, current, and temperature of the DC power supply 11 and the inverter 12, the ground side control unit 15, and an operation signal to the ground side control unit 15. An operation switch 18 and a wireless LAN 17 that performs near field communication between the vehicle side device 101 are provided. Furthermore, the power supply apparatus 102 includes a display unit 22 that displays various types of information including positional information of the vehicle coil 35 with respect to the ground coil 14.

The ground side control unit 15 comprehensively controls the power supply apparatus 102. In particular, various controls including operations of the inverter 12 and the DC power supply 11 are performed. Specifically, when transmitting power to the vehicle-side device 101, the ground-side control unit 15 supplies power supply AC power output from the inverter 12 to the ground coil 14, and The coil 14 is excited. Further, when performing a support operation for the vehicle to park at a predetermined position in the parking space, a lower excitation power is supplied to the ground coil 14 than when the power for feeding described above is transmitted, and the ground The coil 14 is in a weakly excited state.

On the other hand, the vehicle-side device 101 receives the electric power receiving vehicle coil 35 provided on the bottom surface of the vehicle, the resonance capacitor 34 that resonates electric power between the vehicle coil 35, and the vehicle coil 35. A rectifier circuit 33 that rectifies AC power and converts it into DC power, a battery 31 that charges DC power, and a relay box 32 that switches between charging and discharging of the battery 31 are provided.

Furthermore, the vehicle-side device 101 is generated in a search coil 36 disposed so as to cover the lower surface of the vehicle coil 35 (the surface facing the ground coil 14 and the road surface) and each sensor coil (described later) of the search coil 36. A voltage detection control unit 37 (voltage detection unit, voltage detection means) for detecting a voltage to be detected, a voltage / current / temperature sensor 38 for detecting the output voltage, output current, and temperature of the battery 31, and a vehicle side control unit 39 , A wireless LAN 41 that performs near field communication with the power supply apparatus 102, and a display unit 42 (display unit) that displays various types of information.

Further, the vehicle side device 101 includes an operation switch 44 for inputting an operation signal to the vehicle side control unit 39. Furthermore, the vehicle side control part 39 is connected to the vehicle network 40 which performs data communication between vehicle equipment, such as ECU.

The vehicle-side control unit 39 controls the vehicle-side device 101 as a whole. In particular, based on a detection signal from the voltage detection control unit 37, a relative position between the ground coil 14 and the vehicle coil 35 is obtained using a method described later, and an image showing the relative position is generated to display the display unit. The control to display on 42 is performed. That is, the vehicle-side control unit 39 functions as a position detection unit (position detection unit) that detects the relative position of the vehicle coil 35 with respect to the ground coil 14 based on the voltage detected by the voltage detection control unit 37. It has.

Here, each of the

control units

15 and 39 can be configured as an integrated computer including a central processing unit (CPU) and storage means such as a RAM, a ROM, and a hard disk.

When the battery 31 is charged with electric power, the vehicle driver moves the vehicle and parks it in a predetermined parking space so that the ground coil 14 and the vehicle coil 35 face each other. In this state, electric power is transmitted from the ground coil 14, this electric power is received by the vehicle coil 35, and the received AC power is converted into direct current to charge the battery 31. By doing so, it is possible to charge the battery 31 in a non-contact manner without performing connection using a plug or the like between the vehicle-side device 101 and the power supply device 102.

FIG. 2 is an explanatory diagram schematically showing a positional relationship when the ground coil 14 and the vehicle coil 35 face each other. As shown in FIG. 2, when the vehicle is stopped at a predetermined position in the parking space, the ground coil 14 installed on the road surface of the parking space and the vehicle coil 35 installed on the bottom surface of the vehicle are opposed to each other. Become. And if the electric power for electric power feeding is supplied to the ground coil 14, this electric power will be transmitted to the coil 35 for vehicles, and the battery 31 shown in FIG. 1 can be charged.

A search coil 36 is provided on the lower surface of the vehicle coil 35 (the surface facing the road surface and the ground coil 14) so as to cover the entire vehicle coil 35. As shown in FIG. 3, the search coil 36 includes a plurality of sensor coils 36 </ b> L arranged in a plane (in the figure, 54 of 9 × 6 are shown as an example). A voltage detection control unit 37 is provided on the side of each sensor coil 36L.

FIG. 4 is a block diagram showing a detailed configuration of the voltage detection control unit 37. As shown in the figure, the voltage detection control unit 37 is connected to each sensor coil 36L (indicated as channels 1, 2,... N in FIG. 4), and measures the voltage generated in each sensor coil 36L. . That is, at the time of parking assistance, since low excitation power is supplied to the ground coil 14 as described later, the ground coil 14 is in a weak excitation state. Thereby, the magnetic flux from the ground coil 14 passes through the sensor coil 36L, a voltage is generated in the sensor coil 36L, and the voltage detection control unit 37 detects this voltage.

The voltage detection control unit 37 sequentially switches and outputs voltage signals detected by the sensor coils 36L, a differential amplification unit 52 that amplifies the voltage signal output from the multiplexer 51, and the differential amplification unit. A rectifier 53 that rectifies the voltage signal output from 52, a filter 54 that removes an AC component, and a CPU 55 that performs A / D conversion of the voltage signal are provided. The CPU 55 has a function of transmitting a channel designation signal to the multiplexer 51. Accordingly, the voltage signal detected by each sensor coil 36L is digitized and transmitted to the vehicle side control unit 39 shown in FIG.

Next, the operation of the parking support system 100 according to the present embodiment configured as described above will be described. First, the positional relationship of the vehicle coil 35 with respect to the ground coil 14 and the voltage generated in the search coil 36 will be described with reference to the explanatory diagrams shown in FIGS. FIG. 5 is an explanatory view showing the positional relationship between the ground coil 14 and the vehicle coil 35, and FIG. 6 is an explanatory view showing a high voltage region (voltage generation region) of the search coil 36 in each situation shown in FIG. It is.

As described above, when parking support is started, the ground coil 14 is in a weakly excited state, so that magnetic flux is generated from the ground coil 14. As shown in FIG. 5A, when the vehicle coil 35 approaches the ground coil 14, a voltage is detected in the region q1 at the upper end of the search coil 36, as shown in FIG. The That is, since the magnetic flux output from the ground coil 14 passes through the region at the upper end of the search coil 36, a voltage is generated in the sensor coil 36L in this region.

Further, as shown in FIG. 5B, when a part of the vehicle coil 35 comes to a position facing the ground coil 14, as shown in FIG. The region q2 is detected as a region having a high voltage. Furthermore, as shown in FIG. 5 (c), when the entire vehicle coil 35 is overlapped with the ground coil 14, as shown in FIG. 6 (c), an almost entire region of the search coil 36 is obtained. q3 is detected as a high voltage region. Therefore, based on the voltage distribution detected by the voltage detection control unit 37, as shown in FIGS. 6 (a) to 6 (c), a high voltage region (a voltage of a predetermined level or higher is included in the entire search coil region). If the display area 42 is displayed on the display unit 42, the vehicle driver can recognize the current positional relationship between the ground coil 14 and the vehicle coil 35. That is, parking assistance can be performed. For example, as shown in FIG. 6A, when the high voltage region q1 is generated at the upper end portion in the search coil 36, the driver recognizes that the vehicle needs to be moved further forward. Can be made. Note that the same image as the image displayed on the display unit 42 can be displayed on the display unit 22 on the power supply apparatus 102 side.

As another display method, based on the relative positional relationship between the ground coil 14 and the vehicle coil 35, a vehicle unit icon (a symbol image indicating the position of the vehicle coil) and a ground coil unit icon (a position of the ground coil) are displayed. It is also possible to display on the display unit 42 a symbol image showing FIG. 7 is an explanatory diagram illustrating a display example of a vehicle unit icon and a ground unit icon. As illustrated, the vehicle unit icon includes a vehicle icon 63 and a vehicle coil 35, and the ground coil unit icon includes a power supply icon 61, two

partition line icons

62 a and 62 b, and the ground coil 14.

FIG. 7A shows a positional relationship when the vehicle is approaching a predetermined position of the parking space, and FIG. 7B shows a positional relationship immediately before the vehicle reaches the predetermined position. And by displaying each icon on the screen in this way, the positional relationship between the ground coil 14 and the vehicle coil 35 can be displayed on the display unit 42 in a manner that makes it easier to recognize.

Here, as shown in FIG. 7, in order to display the positional relationship between the ground coil 14 and the vehicle coil 35, it is necessary to obtain the angle formed between the vehicle and the parking space. Hereinafter, an angle calculation method will be described with reference to an explanatory diagram shown in FIG.

The angle formed between the vehicle and the parking space can be obtained based on the shape of the voltage generation region generated in the search coil 36. In this calculation, a position at the center of the voltage generation region is detected and used as a reference position. Hereinafter, the relationship between the voltage generation region and the vehicle position will be described with reference to the explanatory diagram shown in FIG.

The voltage generation region is detected in an elliptical shape within the region of the search coil 36, for example, as indicated by reference numeral P11 in FIG. Then, as shown in FIG. 8A, the horizontal axis is set in the horizontal direction of the elliptical shape (in this case, a straight line x1). And when the voltage value in the direction of the straight line x1 is shown, as shown in FIG.8 (b), a voltage value becomes a peak in the center part. Similarly, the voltage value in the vertical direction has a peak at the center. Therefore, the center of the elliptical voltage generation region P11 shown in FIG. 8A can be set as the reference position Q1. Therefore, if the icon of the ground coil 14 (see FIG. 7) is generated around the reference position Q1, and further the icon of the vehicle coil 35 (see FIG. 7) is generated around the center point Q2 of the search coil 36. The relative positional relationship between the ground coil 14 and the vehicle coil 35 can be shown.

Also, the angle of the vehicle coil 35 with respect to the ground coil 14 can be recognized according to the direction of the straight line x1 and the horizontal axis x2 of the search coil 36. That is, the angle of the vehicle with respect to the parking space can be recognized. In the example shown in FIG. 8A, since the straight line x1 and the horizontal axis x2 are substantially parallel, the vehicle approaches the parking space straightly (the central axis of the parking space and the central axis of the vehicle are parallel). Is recognized.

And by employ | adopting said method, since the relative position and relative direction of a vehicle unit icon and a ground coil unit icon can be determined, it is to (a), (b) in FIG. As shown, each icon can be displayed on the screen.

Next, a specific parking assistance procedure by the parking assistance system 100 according to the present embodiment will be described with reference to a flowchart shown in FIG. This process is executed by the vehicle side control unit 39 and the ground side control unit 15 shown in FIG.

First, in step S11, when it is confirmed that the vehicle has approached the parking space, the ground-side control unit 15 supplies power for weak excitation to the ground coil 14 to place the ground coil 14 in a weakly excited state. This operation is manually performed by an operator who manages the power supply apparatus 102 when it is confirmed that the vehicle has approached. Alternatively, it is possible to detect that the vehicle has approached the parking space by short-range communication using the

wireless LANs

17 and 41 and automatically supply power to the ground coil 14.

Next, in step S12, the vehicle-side control unit 39 measures the voltage distribution in the search coil 36 based on the voltage signal of each sensor coil 36L detected by the voltage detection control unit 37.

In step S13, the vehicle control unit 39 detects a region (voltage generation region) in which the voltage detected by the voltage detection control unit 37 is higher than a preset threshold voltage. That is, as shown in FIG. 6 described above, a region where a high voltage is detected (region q1 in the example of FIG. 6A) is detected.

In step S14, the vehicle-side control unit 39 estimates the vehicle position based on the shape of the voltage generation region. In this process, as shown in FIG. 8 described above, the position of the center of the voltage generation region and the direction with respect to the ground coil 14 are detected, and the position of the vehicle is estimated.

In step S15, the vehicle-side control unit 39, based on the position of the vehicle estimated in step S14, the power icon 61, the two

partition line icons

62a and 62b, the ground coil 14 icon shown in FIG. A vehicle icon 63 and an icon of the vehicle coil 35 are generated and displayed on the display unit 42 shown in FIG. That is, the relative positional relationship between the ground coil 14 and the vehicle coil 35 can be estimated by the process of step S14. In the process of step S14, the angle of the parking space and the vehicle can be estimated based on the angle between the straight line x1 and the horizontal axis x2 shown in FIG. Therefore, each icon described above can be generated, whereby each icon can be displayed on the screen of the display unit 42. At this time, the same image as the display unit 42 may be displayed on the display unit 22 of the power supply apparatus 102.

Thereafter, in step S16, when the vehicle stops at a predetermined position in the parking space, the vehicle-side control unit 39 displays an image indicating that the parking is completed on the display unit 42. That is, when the reference position Q1 and the center point Q2 of the search coil 36 coincide with each other, or when approaching within a short distance, the vehicle is moved to a predetermined position in the parking space (the ground coil 14 and the vehicle coil 35). And the image indicating the completion of parking is displayed on the display unit 42.

In step S17, the vehicle-side control unit 39 determines whether the ignition of the vehicle is on. If it is on (YES in step S17), the process returns to step S12. If it is off (NO in step S17), this process ends.

When the vehicle approaches the parking space in this way, the vehicle icon 63 indicating the position of the vehicle and the

icons

61, 62a, 62b indicating the predetermined position of the parking space are displayed on the display unit 42 provided in the vehicle. Therefore, the operation of parking the vehicle at a predetermined position can be supported.

As described above in detail, in the parking support system 100 according to the present embodiment, the search coil 36 is provided on the lower surface side of the vehicle coil 35, and when performing the parking support, the ground coil 14 is in a weakly excited state. Generate magnetic flux. Based on the voltage generated in each sensor coil 36L included in the search coil 36, the positional relationship between the search coil 36 and the ground coil 14 can be estimated, and further the positional relationship between the vehicle and the parking space can be estimated. Then, by displaying this positional relationship on the display unit 42 provided in the vehicle, the driver can recognize the relative positional relationship between the vehicle position and a predetermined position in the parking space.

Therefore, the vehicle driver can easily park the vehicle at a predetermined position in the parking space by looking at the image displayed on the display unit 42. As a result, the ground coil 14 and the vehicle coil 35 can be reliably aligned, so that contactless charging can be performed with high efficiency. Furthermore, it becomes possible to assist the driver to easily perform an operation of parking the electric vehicle at a desired position.

Further, the search coil 36 is constituted by a plurality of sensor coils 36L, and the positional relationship with the ground coil 14 is detected based on the voltage detected by each sensor coil 36L, so that highly accurate position detection is possible. .

Further, as shown in FIG. 6, since the images of the voltage generation regions q1 to q3 are superimposed on the image of the search coil 36 and displayed on the display unit 42, the ground coil 14 and the vehicle The positional relationship of the coil 35 can be presented in an easily recognizable manner. Thereby, parking can be assisted so that the operation of stopping the vehicle in the predetermined parking space can be easily performed.

Moreover, since the vehicle unit icon and the ground coil unit icon are displayed on the screen on the display unit 42 as shown in FIG. 7, it is possible to present the positional relationship between the current vehicle position and the parking space in an easier-to-recognize manner. it can. Thereby, it becomes possible to contribute to smooth parking operation.
[Description of Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 10 is a block diagram showing a configuration of a parking assistance system according to the second embodiment of the present invention. As shown in FIG. 10, the parking support system 100a according to the second embodiment is substantially the same as the parking support system 100 shown in FIG. 1 described above, so only the differences will be described. The vehicle side device 101a shown in FIG. 10 does not include a search coil and a voltage detection control unit. Further, an excitation control unit 45 (excitation unit, excitation unit) for supplying weak excitation power to the vehicle coil 35 is provided.

On the other hand, the power feeding apparatus 102a includes a search coil 19 and a voltage detection control unit 20 provided so as to cover the upper surface side of the ground coil 14. The search coil 19 includes a plurality of sensor coils in the same manner as the search coil 36 shown in FIG. Further, the voltage detection control unit 20 has the same configuration as the voltage detection control unit 37 shown in FIG. 4, acquires the voltage detected by each sensor coil, and outputs this voltage signal to the ground shown in FIG. 10. To the side control unit 15.

In the parking assistance system 100a according to the second embodiment, when the vehicle is stopped at a predetermined position in the parking space, the vehicle coil 35 is excited by the control of the excitation control unit 45, and the search coil 19 is provided. The voltage generated in each sensor coil is detected. The detected voltage data is transmitted to the vehicle side apparatus 101a through communication between the wireless LAN 17 and the wireless LAN 41. And the vehicle side control part 39 acquires this voltage data, and based on this voltage data, the positional relationship of the ground coil 14 and the vehicle coil 35 using the method similar to 1st Embodiment mentioned above, and Calculate the direction. After that, as shown in FIG. 6 described above, an image in which the image of the voltage generation region is superimposed on the image of the search coil 19 is generated, and this image is displayed on the display unit 42. Alternatively, as shown in FIG. 7, the vehicle unit icon and the ground coil unit icon are displayed on the display unit 42 based on the relative positional relationship. That is, the vehicle side control unit 39 functions as a voltage data acquisition unit (voltage data acquisition unit) that acquires voltage data of a voltage generated in the search coil 19 due to the magnetic flux output from the vehicle coil 35. Prepare.

Thus, as in the first embodiment described above, the driver can easily perform an operation of stopping the vehicle at a predetermined position in the parking space while looking at the image displayed on the display unit 42. Note that the same image may be displayed on the display unit 22 of the power supply apparatus 102a.

Thus, in the parking assistance system 100a according to the second embodiment, the search coil 19 is provided on the upper surface side of the ground coil 14, and when performing the parking assistance, the vehicle coil 35 is set in a weakly excited state to generate magnetic flux. generate. Based on the voltage generated in each sensor coil included in the search coil 19, the positional relationship between the search coil 19 and the vehicle coil 35 can be estimated, and further the positional relationship between the vehicle and the parking space can be estimated. . Then, by displaying this positional relationship on the display unit 42 provided in the vehicle, the driver can recognize the relative positional relationship between the vehicle position and a predetermined position in the parking space.

Therefore, the vehicle driver can easily park the vehicle at a predetermined position in the parking space by looking at the image displayed on the display unit 42. As a result, since the ground coil 14 and the vehicle coil 35 can be reliably aligned, non-contact charging can be performed with high efficiency.

Further, the search coil 19 is composed of a plurality of sensor coils, and the positional relationship between the ground coil 14 and the vehicle coil 35 is detected based on the voltage detected by each sensor coil. Is possible.

Further, as shown in FIG. 6, the positional relationship between the ground coil 14 and the vehicle coil 35 is recognized by superimposing the image of the voltage generation region on the image of the search coil 19 and displaying it on the display unit 42. It can be presented to the driver in an easy manner, and assistance can be provided so that an operation of stopping the vehicle in a predetermined parking space can be easily performed.

Also, as shown in FIG. 7, the vehicle unit icon and the ground coil unit icon are displayed on the display unit 42, thereby presenting the positional relationship between the current vehicle position and the parking space in an easier-to-recognize manner. Therefore, it is possible to contribute to a smooth parking operation.

As mentioned above, although the electric vehicle of this invention and the parking assistance system of the electric vehicle were demonstrated based on embodiment of illustration, this invention is not limited to this, The structure of each part is arbitrary which has the same function. It can be replaced with a configuration one. For example, in the first embodiment, the number of sensor coils 36L provided in the search coil 36 is 54, but the present invention is not limited to this.

This application claims priority based on Japanese Patent Application No. 2013-072711 filed on March 29, 2013, the contents of which are incorporated into the description of the present invention by reference.

According to the electric vehicle and the electric vehicle parking assistance system according to one aspect of the present invention, it is possible to assist so that an operation of parking the electric vehicle in a predetermined parking space of the power feeding device can be easily performed. Therefore, the electric vehicle and the electric vehicle parking assistance system according to one embodiment of the present invention are industrially applicable.

DESCRIPTION OF SYMBOLS 10 Commercial power supply 11 DC power supply 12 Inverter 13 Resonance capacitor 14 Ground coil 15 Ground side control part 16 Voltage / current / temperature sensor 17 Wireless LAN
DESCRIPTION OF SYMBOLS 18 Operation switch 19 Search coil 20 Voltage detection control part 22 Display part 31 Battery 32 Relay box 33 Rectifier circuit 34 Resonance capacitor 35 Coil for vehicles 36 Search coil 36L Sensor coil 37 Voltage detection control part 38 Voltage / current / temperature sensor 39 Vehicle side Control unit 40 Vehicle network 41 Wireless LAN
42 Display Unit 44 Operation Switch 45 Excitation Control Unit 51 Multiplexer 52 Differential Amplifier 53 Rectifier 54 Filter 55 CPU
61

Power icon

62a, 62b Partition line icon 63

Vehicle icon

100, 100a

Parking support system

101, 101a

Vehicle side device

102, 102a Power supply device

Claims

Electricity having a function that a coil for vehicles is installed on the bottom surface of the vehicle, power for electric power transmitted from a ground coil installed on a road surface of a parking space is received by the coil for vehicles, and the battery is charged with the received power In cars,
A search coil provided to cover a surface facing the road surface of the vehicle coil;
A voltage detection unit for detecting a voltage generated in the search coil when excitation power lower than the power for feeding is supplied to the ground coil;
A position detection unit that detects a relative position of the vehicle coil with respect to the ground coil based on the voltage detected by the voltage detection unit;
A display unit for displaying position information detected by the position detection unit;
An electric vehicle comprising:
The search coil includes a plurality of sensor coils arranged in a plane,
The voltage detection unit detects a voltage generated in each of the sensor coils when excitation power is supplied to the ground coil.
The position detection unit outputs, as the position information, a voltage generation region in which a voltage of a predetermined level or higher is generated in the entire region of the search coil based on the voltage detected by the voltage detection unit. The electric vehicle according to claim 1.
3. The electric vehicle according to claim 2, wherein the display unit displays an image in which an image showing the voltage generation region is superimposed on an image showing the search coil.
The position detection unit obtains a relative position of the vehicle coil with respect to the ground coil based on the voltage generation region;
3. The electricity according to claim 2, wherein the display unit displays a symbol image indicating the position of the ground coil and a symbol image indicating the position of the vehicle coil based on the relative position. Car.
Electricity having a function that a coil for vehicles is installed on the bottom surface of the vehicle, power for electric power transmitted from a ground coil installed on a road surface of a parking space is received by the coil for vehicles, and the battery is charged with the received power In cars,
An excitation unit for supplying electric power to the vehicle coil to excite the vehicle coil;
A voltage data acquisition unit that acquires voltage data of a voltage generated by a search coil provided to cover the upper surface side of the ground coil due to the magnetic flux output from the vehicle coil excited by the excitation unit When,
A position detection unit that detects a relative position of the vehicle coil with respect to the ground coil based on the voltage data acquired by the voltage data acquisition unit;
A display unit for displaying position information detected by the position detection unit;
An electric vehicle comprising:
The position detection unit obtains a voltage generation region in which a voltage of a predetermined level or more is generated among the entire region of the search coil based on the voltage data acquired by the voltage data acquisition unit,
The electric vehicle according to claim 5, wherein the display unit displays an image obtained by superimposing an image indicating the voltage generation region on an image indicating the search coil.
The position detection unit obtains a voltage generation region in which a voltage of a predetermined level or more is generated from the entire region of the search coil based on the voltage data acquired by the voltage data acquisition unit, and the voltage generation Based on the area, determine the relative position of the vehicle coil with respect to the ground coil,
6. The electricity according to claim 5, wherein the display unit displays a symbol image indicating the position of the ground coil and a symbol image indicating the position of the vehicle coil based on the relative position. Car.
Supports parking of the electric vehicle so that the power receiving vehicle coil provided on the bottom surface of the electric vehicle has a desired positional relationship with the ground coil for power transmission provided on the road surface of the parking space. In the parking support system to
When supplying electric power to the electric vehicle, electric power is supplied to the ground coil, and at the time of parking assistance of the electric vehicle, electric power is supplied to the ground coil to supply excitation power lower than the electric power for power supply. And
A search coil provided to cover a surface facing the road surface of the vehicle coil;
A voltage detection unit for detecting a voltage generated in the search coil when excitation power is supplied to the ground coil;
A position detection unit that detects a relative position of the vehicle coil with respect to the ground coil based on the voltage detected by the voltage detection unit;
A display unit that is provided in the electric vehicle and displays the position information detected by the position detection unit;
An electric vehicle parking assistance system comprising:
The search coil includes a plurality of sensor coils arranged in a plane,
The voltage detection unit detects a voltage generated in each of the sensor coils when excitation power is supplied to the ground coil.
The position detection unit outputs, as the position information, a voltage generation region in which a voltage of a predetermined level or higher is generated in the entire region of the search coil based on the voltage detected by the voltage detection unit. The electric vehicle parking assistance system according to claim 8,
10. The electric vehicle parking assistance system according to claim 9, wherein the display unit displays an image in which an image showing the voltage generation region is superimposed on an image showing the search coil.
The position detection unit obtains a relative position of the vehicle coil with respect to the ground coil based on the voltage generation region;
10. The electricity according to claim 9, wherein the display unit displays a symbol image indicating the position of the ground coil and a symbol image indicating the position of the vehicle coil based on the relative position. Car parking support system.
Supports parking of the electric vehicle so that the power receiving vehicle coil provided on the bottom surface of the electric vehicle has a desired positional relationship with the ground coil for power transmission provided on the road surface of the parking space. In the parking assistance system
An excitation unit for supplying electric power to the vehicle coil to excite the vehicle coil;
A search coil provided to cover the upper surface side of the ground coil;
A voltage detection unit for detecting a voltage generated in the search coil due to a magnetic flux output from the vehicle coil excited by the excitation unit;
A position detection unit that detects a relative position of the vehicle coil with respect to the ground coil based on the voltage detected by the voltage detection unit;
A display unit that is provided in the electric vehicle and displays position information detected by the position detection unit;
An electric vehicle parking assistance system comprising:
The search coil includes a plurality of sensor coils arranged in a plane,
The voltage detection unit detects a voltage generated in each sensor coil when the vehicle coil is excited,
The position detection unit outputs, as the position information, a voltage generation region in which a voltage of a predetermined level or higher is generated in the entire region of the search coil based on the voltage detected by the voltage detection unit. The parking assistance system for an electric vehicle according to claim 12,
14. The electric vehicle parking assistance system according to claim 13, wherein the display unit displays an image in which an image showing the voltage generation region is superimposed on an image showing the search coil.
The position detection unit obtains a relative position of the vehicle coil with respect to the ground coil based on the voltage generation region;
The electricity according to claim 13, wherein the display unit displays a symbol image indicating the position of the ground coil and a symbol image indicating the position of the vehicle coil based on the relative position. Car parking support system.
Electricity having a function that a coil for vehicles is installed on the bottom surface of the vehicle, power for electric power transmitted from a ground coil installed on a road surface of a parking space is received by the coil for vehicles, and the battery is charged with the received power In cars,
A search coil provided to cover a surface facing the road surface of the vehicle coil;
Voltage detecting means for detecting a voltage generated in the search coil when excitation power lower than the power for feeding is supplied to the ground coil;
Position detecting means for detecting a relative position of the vehicle coil with respect to the ground coil based on the voltage detected by the voltage detecting means;
Display means for displaying position information detected by the position detection means;
An electric vehicle comprising:
Electricity having a function that a coil for vehicles is installed on the bottom surface of the vehicle, power for electric power transmitted from a ground coil installed on a road surface of a parking space is received by the coil for vehicles, and the battery is charged with the received power In cars,
Excitation means for supplying power to the vehicle coil to excite the vehicle coil;
Voltage data acquisition means for acquiring voltage data of a voltage generated by a search coil provided to cover the upper surface side of the ground coil due to the magnetic flux output from the vehicle coil excited by the excitation means When,
Position detecting means for detecting a relative position of the vehicle coil with respect to the ground coil based on the voltage data acquired by the voltage data acquiring means;
Display means for displaying position information detected by the position detection means;
An electric vehicle comprising:
Supports parking of the electric vehicle so that the power receiving vehicle coil provided on the bottom surface of the electric vehicle has a desired positional relationship with the ground coil for power transmission provided on the road surface of the parking space. In the parking assistance system
When supplying electric power to the electric vehicle, electric power is supplied to the ground coil, and at the time of parking assistance of the electric vehicle, electric power is supplied to the ground coil to supply excitation power lower than the electric power for power supply. Means,
A search coil provided to cover a surface facing the road surface of the vehicle coil;
Voltage detecting means for detecting a voltage generated in the search coil when excitation power is supplied to the ground coil;
Position detecting means for detecting a relative position of the vehicle coil with respect to the ground coil based on the voltage detected by the voltage detecting means;
Display means provided on the electric vehicle and displaying the position information detected by the position detection means on a screen;
An electric vehicle parking assistance system comprising:
Supports parking of the electric vehicle so that the power receiving vehicle coil provided on the bottom surface of the electric vehicle has a desired positional relationship with the ground coil for power transmission provided on the road surface of the parking space. In the parking assistance system
Excitation means for supplying power to the vehicle coil to excite the vehicle coil;
A search coil provided to cover the upper surface side of the ground coil;
Voltage detection means for detecting a voltage generated in the search coil due to magnetic flux output from the vehicle coil excited by the excitation means;
Position detecting means for detecting a relative position of the vehicle coil with respect to the ground coil based on the voltage detected by the voltage detecting means;
Display means provided in the electric vehicle and displaying position information detected by the position detection means;
An electric vehicle parking assistance system comprising: