JP2013141350A - Contactless feed system and vehicle - Google Patents

Abstract

A non-contact power feeding system and a vehicle capable of using a secondary coil on a vehicle side as a reference for alignment without moving a primary coil on a power transmission side.
SOLUTION: Car stops 211 and 212 configured by recesses for dropping both left and right wheels to park and stop a vehicle 100, and a power transmission coil 11 having a central portion arranged vertically above or vertically below an intermediate portion between the vehicle stops 211 and 212. Are arranged in the parking area 200. In addition, the power receiving coil 31 having a central portion arranged vertically above or vertically below an intermediate portion between the front wheels 111 and 112 is disposed in the vehicle 100. When the vehicle 100 is parked forward by preventing the vehicle 100 from passing by the car stops 211 and 212, the power receiving coil 31 overlaps the power transmitting coil 11 in the vertical direction.
[Selection] Figure 1

Description

  The present invention relates to a non-contact power feeding system that supplies electric power from a primary coil disposed in a parking / stopping zone where the vehicle is parked and stopped to a secondary coil mounted on a lower part of the vehicle, and a vehicle constituting the system. .

  In recent years, HVs (Hybrid Vehicles) and EVs (Electric Vehicles) are rapidly spreading as environmentally friendly and highly fuel-efficient vehicles. Each of these vehicles includes a motor that drives driving wheels and a secondary battery that supplies electric power to the motor. Among HVs, PHVs (Plug-in Hybrid Vehicles) and EVs having an external interface for charging charge the secondary battery from outside the vehicle.

  On the other hand, non-contact charging has recently attracted attention as a method for charging a secondary battery included in a moving body such as a vehicle or a portable terminal without using a charging cable. Among non-contact charging methods, non-radiation type using electromagnetic induction or magnetic resonance and radiation type using electromagnetic waves are the mainstream, especially non-radiation type for mobile objects. Has been.

  When the vehicle is parked and parked in the parking / stopping area and the secondary battery of the vehicle is contactlessly charged, the electric power between the primary coil placed in the parking / stopping area and the secondary coil mounted on the vehicle In order to increase the transmission efficiency, the horizontal alignment of the primary coil and the secondary coil is particularly important.

  On the other hand, in Patent Document 1, for example, in a non-contact power feeding device that feeds power by electromagnetic coupling from a primary coil on a fixed side to a secondary coil on an electric vehicle side, a power feeding state on a primary coil side and a power receiving state on a secondary coil side Based on the above, a technique for moving the position of the primary coil so as to maximize the power supply efficiency is disclosed.

  Moreover, in patent document 2, the primary coil is arrange | positioned in the intermediate position of one set of car stops in the parking lot where the non-contact power supply device is arranged, and the secondary coil is biased behind the intermediate position of the left and right rear wheels. A technique is disclosed in which the center of the secondary coil is positioned above the primary coil when the rear wheel of the vehicle placed in contact with the vehicle stop is stopped.

JP 2006-345588 A JP 2011-97671 A

  However, the technique disclosed in Patent Document 1 requires a moving means for moving the position of the primary coil provided on the fixed side, and there is a problem that the configuration becomes complicated. Moreover, in the technique disclosed in Patent Document 2, since the primary coil arranged on the infrastructure side is used as a reference for alignment, the position of the secondary coil is not uniquely determined in a vehicle equipped with the secondary coil. There was a problem.

  The present invention has been made in view of such circumstances, and an object thereof is to make it possible to use the secondary coil on the vehicle side as a reference for alignment without moving the primary coil on the power transmission side. To provide a non-contact power feeding system and a vehicle.

  A non-contact power feeding system according to the present invention includes a secondary coil mounted on a vehicle, and a primary coil disposed in a parking and stopping area where the vehicle is parked and stopped, and power is supplied from the primary coil to the secondary coil. In the non-contact power supply system to be supplied, the secondary coil is disposed between the left and right front wheels (or rear wheels) in the vehicle, and the front and rear wheels (or rear wheels) pass through the parking and stopping area. The primary coil and the secondary coil overlap in the vertical direction when the vehicle is parked forward (or backward) by the vehicle stop. .

In the present invention, when a vehicle is parked forward (or rearward) by preventing the vehicle from passing by a car stop disposed in the parking / stopping area, it is disposed between the front wheels (or rear wheels) of the vehicle. The secondary coil thus overlapped with the primary coil disposed in the parking and stopping area in the vertical direction.
Thereby, when the vehicle is parked and stopped with the side on which the secondary coil is disposed facing the vehicle stop, the primary coil and the secondary coil are relatively positioned.

  In the non-contact power feeding system according to the present invention, the secondary coil is arranged such that a central portion thereof overlaps with an intermediate portion between the left and right front wheels (or rear wheels) in a vertical direction. .

In the present invention, the central portion of the secondary coil is positioned vertically above or vertically below the middle portion between the left and right front wheels (or rear wheels).
As a result, the horizontal position of the secondary coil serving as a positioning reference is determined simply and clearly based on the positional relationship with the front wheel (or rear wheel), and the positioning accuracy between the primary coil and the secondary coil is increased.

  In the non-contact power feeding system according to the present invention, the primary coil and the secondary coil include a core made of a magnetic material, and a conducting wire is wound around the core, and an axial direction of the winding of the conducting wire is a progression of the vehicle. It is characterized by being in the direction or the vehicle width direction.

In the present invention, a conducting wire is wound around a magnetic core to form a primary coil and a secondary coil, and the winding axis of each coil is directed in the traveling direction or the vehicle width direction of the vehicle.
Thereby, the leakage magnetic flux is reduced as compared with the case without the core, and the magnetic flux density between the vertical gaps is increased. In addition, the vehicle is parked and stopped by matching the direction in which the degree of reduction in the degree of coupling with respect to the horizontal displacement between the primary coil and the secondary coil is small and the direction in which the displacement of the vehicle during parking is large. The degree of coupling between the primary coil and the secondary coil is ensured satisfactorily.

  In the non-contact power feeding system according to the present invention, the vehicle stop is a concave portion into which one or both of the left and right front wheels (or rear wheels) are dropped, and the primary coil has a central portion at the side of the concave portion or the concave portion. It arrange | positions so that it may overlap with the site | part located in the perpendicular direction.

In the present invention, a recess for dropping one or both of the left and right wheels to park the vehicle constitutes a vehicle stop. Then, the primary coil is arranged in the front-rear direction with respect to the recess so that the vehicle-side secondary coil placed between the left and right wheels dropped into the recess overlaps the primary coil on the parking / stopping zone side in the vertical direction. Position. In other words, the central portion of the primary coil is positioned vertically above or vertically below the recess formed between the left and right wheels (or a portion located on the lateral extension line of the recess having a short lateral length).
Thereby, when the vehicle is parked and stopped by the vehicle stop, the front-rear direction shift of the central portion of the primary coil with respect to the central portion of the secondary coil is prevented.

  In the non-contact power feeding system according to the present invention, the vehicle stop is a convex portion that prevents one or both of the left and right front wheels (or rear wheels) from getting over, and the primary coil has a central portion, the convex portion or The vehicle is disposed so as to deviate in the backward (or forward) direction of the vehicle by a distance corresponding to the height of the convex portion from a position that overlaps with a portion located on the side of the convex portion in the vertical direction. And

In the present invention, the convex portion that prevents one or both of the left and right wheels from getting over and parks the vehicle constitutes a vehicle stop. The primary coil is arranged in the front-rear direction with respect to the convex portion so that the secondary coil on the vehicle side disposed between the left and right wheels blocked by the convex portion overlaps with the primary coil on the parking / stopping zone side in the vertical direction. Position to. That is, the height of the convex portion from a position vertically above or vertically below a convex portion formed between the left and right wheels (or a portion located on a lateral extension line of the convex portion having a short lateral length). The central portion of the primary coil is arranged at a position shifted in the direction opposite to the vehicle entry direction by a distance corresponding to
Thereby, when the vehicle is parked and stopped by a vehicle stop, the positional deviation in the front-rear direction of the central portion of the primary coil with respect to the central portion of the secondary coil is prevented.

  In the non-contact power feeding system according to the present invention, in the parking / stopping area, opposing inner side surfaces are formed in a tapered shape whose interval is narrowed in the forward (or reverse) direction of the vehicle, and the front wheel (or A guide portion is provided for guiding the rear wheel) to a position where the vehicle stop is provided.

In the present invention, in order to guide the front wheel (or the rear wheel) to the position where the vehicle stop is disposed, the tapered guide portion whose inner surfaces facing each other are narrowed toward the vehicle entering direction is provided. Provide.
Accordingly, the lateral displacement of the vehicle, that is, the lateral displacement between the primary coil and the secondary coil is reduced until the front wheel (or the rear wheel) of the vehicle entering the parking / stopping area reaches the vehicle stop.

  The vehicle according to the present invention includes a coil to which electric power is supplied from the outside, and the coil has a central portion that overlaps with an intermediate portion between left and right front wheels (or rear wheels) in the vertical direction in the vehicle. It arrange | positions like this.

In the present invention, the central portion of the secondary coil to which electric power is supplied from the outside is positioned vertically above or vertically below the middle portion between the left and right front wheels (or rear wheels).
Accordingly, the horizontal position of the secondary coil serving as a positioning reference is simply and clearly determined by the positional relationship with the front wheel (or the rear wheel), and the positioning accuracy with respect to the primary coil disposed in the parking and stopping area is increased.

According to the present invention, the primary coil disposed in the parking and stopping area and the secondary coil disposed between the left and right front wheels (or the rear wheels) of the vehicle are overlapped in the vertical direction when the vehicle is parked and stopped. Relative positioning is performed.
Therefore, the secondary coil on the vehicle side can be used as a reference for alignment without moving the primary coil on the power transmission side.

A is a perspective side view schematically showing a configuration of a non-contact power feeding system according to Embodiment 1 of the present invention, and B is a perspective plan view thereof. It is a block diagram which shows the structure of a non-contact electric power feeding system. A is a see-through side view schematically showing a configuration of a non-contact power feeding system according to Embodiment 2 of the present invention, and B is a see-through plan view. A is a perspective side view schematically showing a configuration of a non-contact power feeding system according to Embodiment 3 of the present invention, and B is a perspective plan view thereof. It is a top view which shows typically a power transmission coil and a receiving coil. It is a perspective top view which shows typically the structure of the parking / stop area of the non-contact electric power feeding system which concerns on Embodiment 4 of this invention. It is a graph explaining the dimension which concerns on a parking stop area.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
1A is a perspective side view schematically showing the configuration of the non-contact power feeding system according to Embodiment 1 of the present invention, and B is a perspective plan view thereof. In the figure, reference numeral 100 denotes a vehicle, and the vehicle 100 is parked and parked forward in a parking / parking area 200.

  The parking / stopping area 200 has car stops 211 and 212 formed by recesses for dropping the left and right front wheels 111 and 112 from the floor (ground), and a central portion arranged vertically above or vertically below the middle part of the car stops 211 and 212. The power transmission coil 11 is provided. The power transmission coil 11 is wound in a spiral shape in a plane parallel to the floor, and has a substantially circular shape in plan view.

  The vehicle 100 includes a power receiving coil 31 having a central portion arranged vertically above or vertically below an intermediate portion between the left and right front wheels 111 and 112. The power reception coil 31 is coupled to the power transmission coil 11 by electromagnetic induction or magnetic resonance, is wound in a spiral shape in a plane parallel to the bottom of the vehicle 100, and has a substantially circular shape in plan view. .

  When the vehicle 100 enters the parking / stopping area 200 forward, the passage of the front wheels 111 and 112 is blocked by the recesses of the car stops 211 and 212, and the parking / stopping position is determined. In this case, since the power receiving coil 31 and the power transmission coil 11 overlap in the vertical direction and the winding axes coincide with each other, power is efficiently supplied from the power transmission coil 11 to the power receiving coil 31 without contact.

Next, a method for supplying power from the power transmission coil 11 to the power reception coil 31 will be described.
FIG. 2 is a block diagram showing the configuration of the non-contact power feeding system. The power transmission device 1 includes a high-frequency inverter 12 that converts AC power supplied from an AC power supply 2 of AC 100 V or 200 V into high-frequency power and supplies the power to the power transmission coil 11.

  The power transmission device 1 also includes a communication unit 13 that performs wireless communication using Bluetooth (registered trademark) and the like with the communication unit 33 included in the in-vehicle power receiving device 3, and information transmitted and received via the communication unit 13. And a power transmission control unit 14 for giving a high-frequency power generation start command and a stop command to the high-frequency inverter 12.

  The power receiving device 3 includes a rectifier 32 that rectifies the AC power received by the power receiving coil 31 with a diode bridge, and a power reception control unit 34 that exchanges information with the power transmission control unit 14 via the communication unit 33. The power reception control unit 34 is connected to the operation unit 4 and the charger 5 for receiving the start of power reception. The DC power rectified by the rectifier 32 is supplied to the charger 5, and the charger 5 charges the secondary battery 6.

  When a power reception start operation for the operation unit 4 is received by the power reception control unit 34, the power reception control unit 34 transmits vehicle information to the power transmission control unit 14 via the communication units 33 and 13. The power transmission control unit 14 that has received the vehicle information returns a response signal to the power reception control unit 34 and gives a high frequency power generation start command to the high frequency inverter 12. The high frequency power generated by the high frequency inverter 12 is supplied to the power receiving coil 31 through the power transmission coil 11 in a non-contact manner.

  The power reception control unit 34 that has received the response signal described above via the communication unit 33 gives a charging start command to the charger 5. While the charger 5 is charging the secondary battery 6, information (voltage, current, etc.) relating to the power supplied from the rectifier 32 to the charger 5 is transmitted from the charger 5 to the power reception control unit 34 and the communication unit 33, 13 may be provided to the power transmission control unit 14 as needed. Thereby, the magnitude | size of the high frequency electric power supplied to the power transmission coil 11 is controlled appropriately.

  Thereafter, when the secondary battery 6 becomes fully charged, the charger 5 stops charging and notifies the power reception control unit 34 that the fully charged state is reached. In response to this, the power reception control unit 34 transmits information related to the end of charging to the power transmission control unit 14 via the communication units 33 and 13. The power transmission control unit 14 that has received the information related to the end of charging gives a high frequency power generation stop command to the high frequency inverter 12. Thereby, supply of the high frequency electric power to the power transmission coil 11 is stopped.

As described above, according to the first embodiment, when the vehicle is parked forward and stopped by preventing the vehicle from passing by the parking stop disposed in the parking / parking area, the power reception disposed between the front wheels of the vehicle. The coil overlaps with the power transmission coil disposed in the parking / stopping area in the vertical direction.
Thereby, when the vehicle is parked and stopped with the front side on which the power receiving coil is disposed facing the vehicle stop, the relative positioning of the power transmitting coil and the power receiving coil is performed.
Therefore, the secondary coil on the vehicle side can be used as a reference for alignment without moving the primary coil on the power transmission side.

Further, the central portion of the power receiving coil is positioned vertically above or vertically below the intermediate portion between the left and right front wheels.
Accordingly, the horizontal position of the power receiving coil serving as a positioning reference can be determined simply and clearly based on the positional relationship with the front wheels, and the positioning accuracy between the power transmitting coil and the power receiving coil can be increased.

Further, a car stop is formed by a recess for dropping the left and right wheels to park and stop the vehicle, and the central portion of the power transmission coil is positioned vertically above or vertically below the middle portion of both recesses.
Therefore, when the vehicle is parked and stopped by a vehicle stop, it is possible to prevent the front-rear direction shift of the central portion of the power transmission coil with respect to the central portion of the power receiving coil.

  In the first embodiment, the power receiving coil 31 is disposed in the intermediate portion between the front wheels 111 and 112, but may be disposed in the intermediate portion between the rear wheels 121 and 122. In this case, by allowing the vehicle 100 to enter the parking / stopping area 200 in a backward direction, the recesses of the car stops 211 and 212 prevent the rear wheels 122 and 121 from passing, so that the parking / stopping position is determined and the power receiving coil 31 is The power transmission coil 11 overlaps the vertical direction.

  In the first embodiment, a pair of left and right car stops 211 and 212 are arranged in the parking and stopping area 200. However, the present invention is not limited to this, and either one of the car stops 211 or 212 is arranged. Alternatively, the two car stops 211 and 212 may be extended and connected in the lateral direction.

(Embodiment 2)
While the first embodiment is a form in which the car stops 211 and 212 configured by recessed portions for dropping the left and right front wheels 111 and 112 from the floor (ground) are arranged in the parking and stopping area 200, the second embodiment This is a form in which the car stops 221 and 222 formed by convex portions that prevent the left and right front wheels 111 and 112 from getting over are arranged in the parking and stopping area 200.
3A is a perspective side view schematically showing the configuration of the non-contact power feeding system according to Embodiment 2 of the present invention, and B is a perspective plan view thereof.

  The parking / stopping area 200 includes vehicle stops 221 and 222 configured by convex portions that prevent the left and right front wheels 111 and 112 from getting over, and a position vertically above or vertically below an intermediate portion between the vehicle stops 221 and 222. A power transmission coil 11 having a central portion arranged at a position shifted by a distance y corresponding to the height x of the car stops 221 and 222 in the direction opposite to the approach direction is provided.

  The distance y is not only changed according to the height x, but is also changed depending on factors such as the outer diameter of the front wheels 111 and 112 or the rear wheels 121 and 122, and the cross-sectional shapes of the car stops 221 and 222. By appropriately limiting these fluctuation factors, the distance y corresponding to the height x can be calculated.

  Thus, the power transmission coil 11 is arranged at a position shifted from the position of the power transmission coil 11 in the first embodiment by the distance y in the direction opposite to the approach direction of the vehicle 100. Accordingly, when the vehicle 100 enters the parking / stopping area 200 forward, the front wheels 111 and 112 are blocked by the convex portions of the car stops 221 and 222, and the parking / stopping position is determined. 11 and the winding axis coincide with each other in the vertical direction.

  In addition, the same code | symbol is attached | subjected to the location corresponding to Embodiment 1, and the detailed description is abbreviate | omitted.

As described above, according to the second embodiment, the vehicle stop is configured by the convex portion that prevents the left and right wheels from getting over and parks the vehicle, and the height of the convex portion from the middle portion of the both convex portions. The central portion of the power transmission coil is positioned at a position shifted in the direction opposite to the vehicle entry direction by a distance y corresponding to x.
Therefore, when the vehicle is parked and stopped by the vehicle stop, it is possible to prevent the positional deviation in the front-rear direction of the central portion of the power transmission coil with respect to the central portion of the power receiving coil.

(Embodiment 3)
While the first embodiment is a mode in which the winding axes of the power transmission coil 11 and the power reception coil 31 are aligned in the vertical direction, the third embodiment is a configuration of the power transmission coil 11 and the power reception coil 31 including a core made of a magnetic material. In this configuration, the winding axis is directed in the traveling direction of the vehicle 100.
4A is a perspective side view schematically showing a configuration of a non-contact power feeding system according to Embodiment 3 of the present invention, and B is a perspective plan view thereof.

The parking and stopping area 200 includes car stops 211 and 212, and a power transmission coil 11 having a central part arranged vertically above or vertically below the middle part of the car stops 211 and 212. The winding axis of the power transmission coil 11 is directed in the traveling direction (entry direction) of the vehicle 100.
The vehicle 100 includes a power receiving coil 31 having a central portion arranged vertically above or vertically below an intermediate portion between the left and right front wheels 111 and 112. The power receiving coil 31 has a winding axis directed in the traveling direction of the vehicle 100.

Next, the power transmission coil 11 and the power reception coil 31 will be described.
FIG. 5 is a plan view schematically showing the power transmission coil 11 and the power reception coil 31. The power transmission coil 11 and the power reception coil 31 are formed by winding conducting wires 11b and 31b around cores 11a and 31a made of a rectangular flat magnetic material. When the vehicle 100 is parked or stopped, the power receiving coil 31 mounted on the vehicle 100 moves in the direction indicated by the white arrow, so that the power transmitting coil 11 and the power receiving coil 31 overlap in the vertical direction as shown in FIG. . Thereby, among the cores 11a and 31a, the exposed portions in which the conducting wires 11b and 31b are not wound oppose each other in the vertical direction via the air gap.

  By applying the cores 11a and 31a to the power transmission coil 11 and the power reception coil 31, the leakage magnetic flux is reduced and the magnetic flux density in the air gap is increased. When the power transmitting coil 11 and the power receiving coil 31 are appropriately overlapped in the vertical direction, most of the magnetic flux interlinking with the conducting wires 11b and 31b passes through the exposed portions of the cores 11a and 31a facing each other through the air gap. . That is, when the area of the portion overlapping the vertical direction among the exposed portions of the cores 11a and 31a is maximized, the leakage magnetic flux is minimized and the degree of coupling between the power transmission coil 11 and the power reception coil 31 is maximized.

  In the third embodiment, the exposed portions of the cores 11a and 31a form a rectangle whose longitudinal direction is the vehicle width direction as shown in FIG. 5, so that the power transmission coil 11 and the power reception coil 31 are displaced in the direction of the winding axis. The degree of reduction in the degree of coupling between the two coils is smaller when the vehicle is shifted in the vehicle width direction than when it is. As a result, as in the third embodiment, even when the amount of shift in the vehicle width direction of the vehicle 100 is relatively large when the vehicle is parked or stopped, a good degree of coupling between the two coils is ensured.

  In addition, the same code | symbol is attached | subjected to the location corresponding to Embodiment 1, and the detailed description is abbreviate | omitted.

As described above, according to the third embodiment, a conducting wire is wound around a core made of a rectangular flat magnetic body to form a power transmission coil and a power reception coil, and the winding axis of each coil is directed toward the traveling direction of the vehicle. Align.
Accordingly, it is possible to reduce the magnetic flux leakage as compared with the case without the core and to increase the magnetic flux density between the vertical gaps. In addition, the direction in which the degree of decrease in the degree of coupling with respect to the amount of horizontal displacement between the power transmission coil and the power receiving coil is small coincides with the direction in which the amount of positional displacement of the vehicle during parking is large. It is possible to ensure a good degree of coupling between the primary coil and the secondary coil.

  In the third embodiment, the winding axes of the power transmission coil 11 and the power reception coil 31 are directed in the traveling direction of the vehicle 100, but the present invention is not limited to this. For example, depending on the shape of the cores 11a and 31a and the range in which the conductors 11b and 31b are wound around the cores 11a and 31a, the winding is greater than when the power transmission coil 11 and the power reception coil 31 are displaced in the vehicle width direction. In the case of shifting in the direction of the axis, the degree of reduction in the coupling degree between the two coils may be smaller. At this time, by turning the winding shafts of the power transmission coil 11 and the power receiving coil 31 in the vehicle width direction, even when the amount of deviation of the vehicle 100 in the vehicle width direction is relatively large during parking, the primary coil and the secondary coil It becomes possible to ensure a good degree of coupling between the secondary coils.

(Embodiment 4)
While Embodiments 1 and 3 have a relatively large displacement in the vehicle width direction of vehicle 100 when parked and stopped, Embodiment 4 has front wheels 111 and 112 (or rear wheels 121 and 122). In this embodiment, the amount of deviation of the vehicle 100 in the vehicle width direction is reduced by the guide portion that leads to the position where the vehicle stops 211 and 212 are disposed.
FIG. 6 is a perspective plan view schematically showing a configuration of a parking / parking area 200 of the non-contact power feeding system according to Embodiment 4 of the present invention, and FIG. 7 is a diagram for explaining dimensions according to the parking / parking area 200. It is.

  The parking / stopping area 200 has car stops 211 and 212 formed by recesses for dropping the left and right front wheels 111 and 112 from the floor (ground), and a central portion arranged vertically above or vertically below the middle part of the car stops 211 and 212. And the tapered guide portions 231 and 232 for guiding the front wheels 111 and 112 at positions where the vehicle stops 211 and 212 are disposed. Grooves may be provided on the floor of the parking / parking area 200 at appropriate intervals along a direction orthogonal to the direction in which the vehicle 100 travels so that the vehicle 100 can easily slide in the vehicle width direction.

  The guide portions 231 and 232 are formed such that the interval between the inner side surfaces 231 a and 232 a facing each other narrows in the direction in which the vehicle 100 enters. The distance between the guide portions 231 and 232 at the positions of the car stops 211 and 212 is equal to the maximum parking width a occupied by the vehicle 100 having the maximum vehicle width and the maximum tire width c.

  In FIG. 6, the front wheels 111 and 112 of the vehicle 100 having the tread width b and the tire width c are overlaid. In the fourth embodiment, when the front wheels 111 and 112 travel as indicated by the white arrows, the outer surfaces of the front wheels 111 come into contact with the inner surface 231a of the guide portion 231, so that the front wheels 111 and 112 are stopped 211. , 212 are guided to the guide portion 231. The same applies to the case where the vehicle 100 is moved backward and the rear wheels 122 and 121 are guided to the guide portions 231 to the positions of the car stops 211 and 212.

  Next, numerical values and numerical ranges shown in FIG. 7 will be described. In the fourth embodiment, a 3000 cc class ordinary vehicle with a tread width of 1525 mm is assumed from a light vehicle with a tread width b of 1465 mm. When the vehicle 100 is a light vehicle, the tire width c is 135 mm to 165 mm, and when the vehicle 100 is a 3000 cc class ordinary vehicle, the tire width c is 195 mm to 255 mm. Accordingly, the maximum parking width a is 1780 mm, which is the maximum tread width b plus the maximum tire width c.

  Here, the shift width d in the vehicle width direction when the light vehicle and the ordinary vehicle having the tread width b and the tire width c are parked in the parking / parking area 200 shown in FIG. 6 will be considered. The minimum value of the deviation width d is clearly 0 mm. The shift width d is maximized when the front wheel 111 (or front wheel 112) of a light vehicle having a tread width b of 1465 mm and a tire width c of 135 mm is guided to the guide portion 231 (or the guide portion 232) to stop the vehicle 211. This is a case of entering to the position of (or the car stop 212). In this case, the shift width d is reduced to 90 mm (a / 2-b / 2-c / 2 = 1780/21462 / 2-135 / 2) due to the dimensional relationship shown in FIG.

  In addition, the same code | symbol is attached | subjected to the location corresponding to Embodiment 1, and the detailed description is abbreviate | omitted.

As described above, according to the fourth embodiment, in order to guide the front wheel (or rear wheel) to the position where the vehicle stop is disposed, the opposing inner side surfaces are narrowed toward the vehicle approach direction. A tapered guide is provided.
Therefore, it is possible to reduce the lateral displacement of the vehicle, that is, the lateral displacement between the power transmission coil and the power reception coil, until the front wheel (or the rear wheel) of the vehicle entering the parking / stopping area reaches the stop. Become.

  In the fourth embodiment, the guide portions 231 and 232 for guiding the front wheels 111 and 112 (or the rear wheels 122 and 121) to the car stops 211 and 212 are arranged in the parking and stopping area 200. Alternatively, guide portions 231 and 233 for guiding the rear wheel 122) to the car stop 211 may be arranged. In this case, the interval between the guide portions 231 and 233 at the position of the car stop 211 is set to c−max = 255 mm.

  Further, in the first to fourth embodiments, the central portion of the power receiving coil 31 is arranged vertically above or vertically below the middle between the left and right front wheels 111 and 112 (or rear wheels 121 and 122). You may make it arrange | position the receiving coil 31 in the position shifted | deviated to the front or back only a fixed distance from the said center part. In this case, the position of the power transmission coil 11 in the parking / stopping zone 200 is shifted in the same direction by the same distance as the fixed distance.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

100 Vehicle 111, 112 Front wheel 121, 122 Rear wheel 200 Parking stop area 211, 212 Car stop (recess)
221,222 Car stop (convex part)
231, 232, 233 Guide portion 231 a, 232 a Inner side 1 Power transmission device 11 Power transmission coil (primary coil)
11a Core 11b Conductor 3 Power receiving device 31 Power receiving coil (secondary coil)
31a Core 31b Conductor 5 Charger 6 Secondary battery

Claims (7)

A non-contact power feeding system comprising a secondary coil mounted on a vehicle and a primary coil disposed in a parking and stopping area where the vehicle is parked and stopped, and supplying power from the primary coil to the secondary coil,
The secondary coil is disposed between left and right front wheels (or rear wheels) in the vehicle,
In the parking and stopping area, a vehicle stop that prevents passage of the front wheel (or rear wheel) is disposed,
When the vehicle is parked forward (or rearward) by the vehicle stop, the primary coil and the secondary coil overlap in the vertical direction.   2. The contactless power feeding system according to claim 1, wherein the secondary coil is arranged so that a central portion thereof overlaps with an intermediate portion between the left and right front wheels (or rear wheels) in a vertical direction. .   The primary coil and the secondary coil include a core made of a magnetic material, a conductive wire is wound around the core, and an axial direction of the winding of the conductive wire is a traveling direction or a vehicle width direction of the vehicle. The non-contact power feeding system according to claim 1, wherein the non-contact power feeding system is provided. The vehicle stop is a recess for dropping one or both of the left and right front wheels (or rear wheels),
The said primary coil is arrange | positioned so that the center part may overlap with the site | part located in the side of the said recessed part or the said recessed part at a perpendicular direction, The any one of Claim 1 to 3 characterized by the above-mentioned. Contactless power supply system. The vehicle stop is a convex portion that prevents one or both of the left and right front wheels (or rear wheels) from getting over,
The primary coil travels backward (or forwards) by a distance corresponding to the height of the convex portion from a position where the central portion overlaps the convex portion or a portion located on the side of the convex portion in the vertical direction. The non-contact power feeding system according to any one of claims 1 to 3, wherein the non-contact power feeding system is arranged so as to be biased in a direction.   In the parking / parking area, opposing inner surfaces are formed in a taper shape whose interval is narrowed toward the forward (or backward) direction of the vehicle, and the front wheel (or rear wheel) is provided with the vehicle stop. The non-contact electric power feeding system according to claim 1, wherein a guide portion that leads to a different position is provided. A vehicle including a coil to which power is supplied from the outside,
The said coil is arrange | positioned so that the center part may overlap with the intermediate part between the left and right front wheels (or rear wheels) in the said vehicle in the perpendicular direction.

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