JP2011217452A - Contactless charging system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a noncontact charging system which enables easy and quick charge work.SOLUTION: The noncontact charging system includes transmission apparatus 6, which has a primary coil 5 for supplying power through electromagnetic induction; a receiving apparatus 32, which has a secondary coil 31 that electromagnetically couples with the transmission equipment 6 to receive power; a specifying device 8, which specifies the position of a secondary coil 31 of the receiving apparatus 32; and a driver 7, which shifts the transmitting apparatus 6 to a position specified by the specifying device 8 and positions the primary coil 5, at a position corresponding to the secondary coil 31. The specifying device 8 is equipped with a lock 10, which detects the positions of the tires 11 and 11 of the front wheel of an electric car 2 equipped with the reciving apparatus 32, a center detector 18, which detects the position of the center line in width direction of the car body 2a, and a determiner 19 which specifies the position of the secondary coil 31, based on the positions of the tires 11 and 11 detected by the lock 10 and the position of the center line detected by the center detector 18.

Description

  The present invention relates to a non-contact charging system used for an electric vehicle, for example.

  For example, in an electric vehicle that charges a battery using a non-contact charging system, the vehicle is parked at a predetermined position, and a power feeding unit provided on the ground side and a power receiving unit provided on the vehicle side are opposed to each other. The power feeding unit and the power receiving unit are electromagnetically coupled to charge the battery. Here, the power feeding unit and the power receiving unit are remarkably deteriorated in charging efficiency due to misalignment when facing each other. However, it is difficult for the user to accurately grasp the positions of the power feeding unit and the power receiving unit while driving.

  For this reason, the tire guide that guides the power receiving unit of the electric vehicle to the power supply unit on the ground side and the vehicle stop are used so that when the electric vehicle contacts the vehicle stop, the power supply unit and the power reception unit face each other. A charging system is disclosed (see, for example, Patent Document 1).

JP 2003-61266 A

  However, in the above-described conventional technology, when positioning the electric vehicle using the tire guide, it is necessary to match the tire guide with the tire tread width and the tire width of the electric vehicle. For this reason, when there are a plurality of tread widths of the electric vehicle using the non-contact charging system, it is necessary to check the width of the tire guide and the tire tread width when the tire guide is guided by the tire guide. Moreover, it is necessary to adjust the width | variety of a tire guide according to the tire tread width | variety of the electric vehicle used as needed.

  Furthermore, even in the case of electric vehicles of the same vehicle type, when the wheel offset or the tire width changes due to tire replacement or the like, it is necessary to adjust the width of the tire guide again after measuring the tire tread width. For this reason, when performing a charging operation, there is a problem that it takes time and effort to stop the electric vehicle at a predetermined position so that the power feeding unit and the power receiving unit face each other.

  Therefore, the present invention has been made in view of the above-described circumstances, and provides a non-contact charging system that can easily and quickly perform a charging operation.

  In order to solve the above problem, the invention described in claim 1 is a power transmission device (for example, a primary coil for supplying power by electromagnetic induction (for example, the primary coil 5 in the first embodiment)) (for example, A power receiving device (for example, in the first embodiment) having a power transmitting device 6) in the first embodiment and a secondary coil (for example, the secondary coil 31 in the first embodiment) that electromagnetically couples with the power transmitting device and receives power. A power receiving device 32), a specifying device for specifying the position of the secondary coil of the power receiving device (for example, the specifying device 8 in the first embodiment), and moving the power transmitting device to the position specified by the specifying device, A driving device that aligns the primary coil at a position corresponding to the secondary coil (for example, the driving device 7 in the first embodiment), and the specific device is a vehicle including the power receiving device. A front detector for detecting a predetermined position in the vehicle (for example, the wheel stopper 10 in the first embodiment) and a center detector for detecting the center in the width direction of the vehicle (for example, the center detector 18 in the first embodiment). And a predetermined position (for example, distance X in the first embodiment) detected by the front detection unit, and a center position in the width direction (for example, center line LC1 in the first embodiment) detected by the center detection unit. ) And a determination unit (for example, determination unit 19 in the first embodiment) for specifying the position of the secondary coil (for example, the center P2 in the first embodiment). .

  As described above, since the position of the secondary coil is specified on the basis of the predetermined position in the vehicle and the center position in the width direction of the vehicle regardless of the tire tread width as in the past, the shape and size of the vehicle are There is no need to adjust the contactless charging system each time it changes. In addition, since the position of the secondary coil is specified from a position that does not change depending on the shape and size of the vehicle, that is, a predetermined position in the vehicle and the center position in the width direction of the vehicle, the position of the secondary coil can be specified with high accuracy. it can.

  According to a second aspect of the present invention, the specific device includes a wheel stopper (for example, the wheel stopper 10 in the first embodiment) for stopping the vehicle, and the front detection unit is configured so that the vehicle is attached to the wheel stopper. The predetermined position is detected from the contact position, the center detection unit detects the width direction center position from a range where the vehicle contacts the wheel stopper, and the determination unit detects the secondary position from the vehicle side. Coil position information is acquired, and the position of the secondary coil is specified based on the position information of the secondary coil, the detected predetermined position, and the center position in the width direction.

  By comprising in this way, the predetermined position in the front part of a vehicle and the width | variety of a vehicle can be easily detected using the wheel stopper which stops a vehicle. For example, a pressure sensor can be provided on the wheel stopper, and a predetermined position and a center position in the width direction can be specified based on a detection result from the pressure sensor.

  According to a third aspect of the present invention, the position information of the secondary coil is the distance information in the length direction between the predetermined position and the center position of the secondary coil (for example, the distance X in the first embodiment). ) And distance information in the width direction between the center position in the width direction and the center position of the secondary coil (for example, the distance Y1 in the first embodiment), and the determination unit Based on the distance information and the predetermined position detected by the front detection unit, the position in the length direction of the secondary coil is specified, the distance information in the width direction, and the center detection unit A position in the width direction of the secondary coil is specified based on the detected center position in the width direction.

  By comprising in this way, the position of a secondary coil can be pinpointed more accurately and more rapidly.

  In the invention described in claim 4, the wheel stopper is provided rotatably around a fulcrum part (for example, the hinge part 17 in the first embodiment), and the driving device is provided to extend and retract. In addition, a support column (for example, the arm unit 9 in the first embodiment) capable of supporting the power transmission device is provided on one end side, and the other end side of the support column and the wheel stopper are rotated via the fulcrum unit. It is characterized by being connected freely.

  With this configuration, the wheel stopper rotates around the fulcrum, so when charging, for example, even if the vehicle enters the parking space at an angle, the wheel stopper reliably contacts the left and right tires. Can be made. For this reason, the center in the width direction of the vehicle can be orthogonal to the extending direction of the wheel stopper, and the predetermined position in the front portion of the vehicle and the center position in the width direction of the vehicle can be detected with high accuracy.

  According to a fifth aspect of the present invention, the wheel stopper is provided so as to be rotatable about a fulcrum part (for example, the hinge part 17 in the first embodiment), and the driving device is an extension of the wheel stopper. A strut portion (for example, the arm portion 9 in the first embodiment) that is provided so as to be stretchable along a direction intersecting the direction and can support the power transmission device on one end side is connected to the other end side of the strut portion. The moving part (for example, the moving part 51 in 1st embodiment) which can move the said support | pillar part along the extension direction of the said ring stop is provided.

  With this configuration, it is possible to easily and reliably perform the charging operation, and the ring stopper and the column part can be separated from each other, and the ring stopper and the column part are integrated. Compared with the case where it is, the maintenance etc. of a non-contact charge system can be facilitated.

  According to the invention described in claim 1, since the position of the secondary coil is specified on the basis of the predetermined position in the vehicle and the center position in the width direction of the vehicle regardless of the tire tread width as in the prior art, There is no need to adjust the contactless charging system each time the shape or size of the vehicle changes. In addition, since the position of the secondary coil is specified from a position that does not change depending on the shape and size of the vehicle, that is, a predetermined position in the vehicle and the center position in the width direction of the vehicle, the position of the secondary coil can be specified with high accuracy. it can. For this reason, the charging operation can be performed easily and reliably, and the charging operation can be quickly performed as much as adjustment of the non-contact charging system is not required.

  According to the second aspect of the present invention, it is possible to easily detect the predetermined position and the width of the vehicle at the front portion of the vehicle using the wheel stopper for stopping the vehicle. For example, a pressure sensor can be provided on the wheel stopper, and a predetermined position and a center position in the width direction can be specified based on a detection result from the pressure sensor. For this reason, it becomes possible to pinpoint the position of a secondary coil reliably with a simple structure.

  According to the third aspect of the present invention, the position of the secondary coil can be specified more accurately and more quickly. For this reason, it is possible to provide a non-contact charging system capable of shortening the charging operation with high accuracy.

  According to the invention described in claim 4, since the wheel stopper rotates around the fulcrum portion, when charging, for example, even if the vehicle enters the parking space at an angle, the wheel stopper is attached to the left and right tires. It can be reliably contacted. For this reason, the center in the width direction of the vehicle can be orthogonal to the extending direction of the wheel stopper, and the predetermined position in the front portion of the vehicle and the center position in the width direction of the vehicle can be detected with high accuracy. Therefore, the charging operation can be performed more easily and reliably.

  According to the invention described in claim 5, it is possible to easily and surely perform the charging operation, and it is possible to make the ring stopper and the column part separate from each other. The maintenance of the non-contact charging system and the like can be facilitated as compared with the case where they are integrated.

The schematic block diagram of the non-contact charge system seen from the side surface side of the electric vehicle in 1st embodiment of this invention. It is a schematic block diagram of the non-contact charging system seen from the lower side of the electric vehicle in 2nd embodiment of this invention. The flowchart shown about the position adjustment procedure of the primary coil in 1st embodiment of this invention. It is operation | movement explanatory drawing of the position adjustment of the primary coil in 1st embodiment of this invention, Comprising: (a)-(e) shows the state in each step. It is a schematic block diagram of the non-contact charge system in 2nd embodiment of this invention.

(First embodiment)
(Non-contact charging system)
Next, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic configuration diagram of the non-contact charging system 1 viewed from the side of the electric vehicle 2, and FIG. 2 is a schematic configuration diagram of the non-contact charging system 1 viewed from the lower side of the electric vehicle 2. In the following description, the forward direction of the electric vehicle 2 may be simply expressed as the front, the backward direction of the electric vehicle 2 may be simply the rear, and the width direction of the electric vehicle 2 may be expressed as the left-right direction.
As shown in FIGS. 1 and 2, the non-contact charging system 1 is for charging a battery 20 mounted on an electric vehicle 2 or the like, for example, and is a vehicle mounted inside the electric vehicle 2. A side charging device 3 and a parking facility side charging device 4 provided outside the electric vehicle 2 such as a parking lot are provided.

  The electric vehicle 2 cools a motor unit 23 that houses a power transmission unit such as a motor 21 and a speed reducer 22, an inverter 24 for driving the motor 21, a VCU (converter) 25, an inverter 24, and a VCU 25. An EWP (electric cooling water pump) 26 for circulating the refrigerant, a radiator 27 for cooling the refrigerant, and a downverter (converter) 28 for reducing the voltage output from the drive system and supplying it to the battery 20 And a charger 29 used as a voltage converter when charging the battery 20 using the non-contact charging system 1, and a battery 20 disposed on the entire floor below the vehicle body 2a of the electric vehicle 2. .

(Vehicle charging device)
The vehicle side charging device 3 transmits and receives information between the power receiving device 32 having a secondary coil (power receiving coil) 31 that receives power supplied from the parking facility side charging device 4 and the parking facility side charging device 4. The vehicle side transmission / reception part 33 and the control apparatus 34 which performs various control of the non-contact charge system 1 are provided.
The secondary coil 31 is a planar coil formed in a circular shape in plan view, for example, by winding an insulated single wire spirally on the same plane. The secondary coil 31 can receive electric power supplied from the primary coil 5 when electromagnetically coupled to a primary coil (feeding coil) 5 described later provided in the parking facility side charging device 4. ing.

  The control device 34 stores position information of the secondary coil 31. Specifically, the distance X (see FIG. 4A) between the center P2 of the secondary coil 31 and the front outer periphery of the front tire 11 that is the front of the vehicle body 2a, and the secondary coil 31 A distance Y1 (see FIG. 4A) between the center P2 and the center line LC1 in the width direction of the vehicle body 2a is stored in the control device 34 as position information of the secondary coil 31.

(Parking equipment side charging device)
The parking facility side charging device 4 includes the power transmission device 6 having the primary coil 5 for supplying power to the vehicle side charging device 3, the drive device 7 for moving the primary coil 5, and the positions of the secondary coils 31. A specifying device 8 for specifying and a parking facility side transmitting / receiving unit 14 for transmitting and receiving information with the vehicle side charging device 3 are provided.
The primary coil 5 is a planar coil formed in a circular shape in plan view, for example, by winding an insulated single wire spirally on the same plane. The primary coil 5 is configured to generate a magnetic field when a predetermined high-frequency current is applied.

  The driving device 7 has a support frame 16, and a later-described wheel stopper 10 that constitutes a part of the specific device 8 is supported at the tip of the support frame 16 via a hinge portion 17. Further, an arm portion 9 is provided on the ring stopper 10 via a hinge portion 17 toward the opposite side of the support frame 16, and a power transmission device 6 is provided at the tip of the arm portion 9.

  The arm unit 9 is configured to be extendable and contractable, for example, a telescope, and is driven by the driving device 7. A power transmission device 6 is supported at the tip of the arm portion 9. Further, since the base end of the arm portion 9 is provided on the ring stopper 10 via the hinge portion 17, the arm portion 9 is rotatable around the hinge portion 17. In addition, the arm part 9 is not restricted to the case where it is comprised in the shape of a telescope, What is necessary is just to be comprised so that the power transmission apparatus 6 may be slidably provided along the longitudinal direction of the arm part 9. FIG.

The specifying device 8 specifies the position of the center P2 of the secondary coil 31 of the vehicle side charging device 3 and the center detection unit 18 for calculating the position of the center line LC1 in the width direction of the vehicle body 2a. And a determination unit 19 for this purpose.
The wheel stopper 10 is for restricting the movement of the electric vehicle 2, and is a direction intersecting the traveling direction of the electric vehicle 2 (see arrow M1 in FIG. 4A), that is, the width of the vehicle body 2a. It is formed so as to extend along the direction. Further, the length of the wheel stopper 10 is set sufficiently longer than the width of the vehicle body 2a, and the left and right tires 11, 11 on the front wheel side of the electric vehicle 2 are surely brought into contact with the wheel stopper 10. . The center of the ring stopper 10 in the longitudinal direction is supported by the support frame 16 via the hinge portion 17.

By being supported via the hinge portion 17, the ring stopper 10 is rotatable about the hinge portion 17. As a result, even when the electric vehicle 2 enters obliquely with respect to the wheel stopper 10, the wheel stopper 10 rotates around the hinge portion 17.
For this reason, the wheel stopper 10 and the left and right tires 11, 11 on the front wheel side of the electric vehicle 2 are reliably in contact with each other, and the position of the front wheel side tire 11 which is the front portion of the vehicle body 2a is determined. That is, the wheel stopper 10 has a function as a front detection unit that detects the positions of the left and right tires 11 on the front wheel side by restricting the movement of the electric vehicle 2.

Further, the wheel stopper 10 is provided with a tire detection sensor 12 at a site where the tire 11 contacts. The tire detection sensor 12 is for detecting the position of the tire 11. A plurality of tire detection sensors 12 are provided at positions corresponding to the left and right tires 11 on the front wheel side so as to be compatible with various types of electric vehicles 2. When the left and right tires 11, 11 on the front wheel side come into contact with the wheel stopper 10, the tire detection sensor 12 detects the distance between the left and right tires 11, 11 on the front wheel side, that is, the tire tread width.
As the tire detection sensor 12, various sensors such as a contact sensor such as a limit switch, a photoelectric sensor, or a touch panel can be used.

  The detection result by the tire detection sensor 12 is output as a signal to the center detection unit 8a. The center detector 8a calculates the center position between the tires 11 and 11 from the positions of the left and right tires 11 and 11 on the front wheel side. Then, the center position is set as a center line LC1 in the width direction of the vehicle body 2a, and the position information of the center line LC1 is output to the determination unit 19.

The position information of the secondary coil 31 stored in the control device 34 of the vehicle side charging device 3 is input to the determination unit 19 as a signal via the vehicle side transmission / reception unit 33 and the parking facility side transmission / reception unit 14. Further, the determination unit 19 stores position information of the hinge unit 17, that is, position information of the center line LC <b> 2 (see FIG. 4A) in the longitudinal direction of the ring stopper 10.
The determination unit 19 determines the center P2 of the secondary coil 31 based on the position information of the center line LC2 of the ring stop 10 and the position information of the secondary coil 31 and the position information of the center line LC1 input from the center detection unit 8a. Specify the position of. When the position of the center P2 of the secondary coil 31 is specified by the determination unit 19, the position information of the center P2 is output as a signal to the driving device 7.

  Based on the output signal from the determination unit 19, the drive device 7 aligns the position of the center P <b> 1 (see FIG. 4A) of the primary coil 5 with the center P <b> 2 of the secondary coil 31. Move. That is, the drive device 7 adjusts the position of the primary coil 5 with respect to the secondary coil 31 by extending the arm portion 9 or rotating the hinge portion 17 as a center, and sets the specific position to 1. The next coil 5 is moved.

(Primary coil position adjustment procedure)
More specifically, the position adjustment procedure of the primary coil 5 will be described with reference to FIGS.
FIG. 3 is a flowchart showing a procedure for adjusting the position of the primary coil 5, FIG. 4 is a diagram for explaining the operation of adjusting the position of the primary coil 5, and (a) to (e) show the states at each step. Show.
First, as shown in FIG. 3 and FIG. 4A, for example, the electric vehicle 2 is moved forward into the parking space S where the non-contact charging system 1 is installed, that is, in the direction of the arrow M1 in FIG. Move and store. At this time, the arm portion 9 of the driving device 7 is in a contracted state along a direction orthogonal to the extending direction of the ring stopper 10. That is, the center P1 of the primary coil 5 exists on the center line LC2 of the ring stopper 10.

In this state, when the electric vehicle 2 is stored in the parking space S, either one of the left and right tires 11 on the front wheel side contacts the wheel stopper 10 (see step S101, FIG. 4B).
At this time, the user determines whether or not the electric vehicle 2 straight enters the parking space S (step S102). For example, the user determines whether or not the steering is set at the center (zero steering angle).
If the determination in step S102 is “No”, that is, if the electric vehicle 2 is not in a straight line along the parking space S, the electric vehicle 2 is further advanced. Then, the ring stopper 10 rotates around the hinge portion 17 (see step S103 in FIG. 3, FIG. 4C).

Then, it is determined whether the left and right tires 11, 11 on the front wheel side are in contact with the wheel stopper 10 (step S104).
If the determination in step S104 is "No", that is, if the left and right tires 11, 11 on the front wheel side are not in contact with the wheel stopper 10, the process returns to step S102 again, and the electric vehicle 2 straight enters along the parking space S. Judge whether or not.
On the other hand, if the determination in step S102 is “Yes”, that is, if the electric vehicle 2 is stored straight along the parking space S, the process proceeds to step S104, and the left and right tires 11 on the front wheel side contact the wheel stopper 10. Judge whether or not.

  If the determination in step S104 is “Yes”, that is, if both the left and right tires 11 on the front wheel side are in contact with the wheel stopper 10, the electric vehicle 2 is stopped in this state. Thereby, the positions of the left and right tires 11 on the front wheel side are determined. Then, based on the distance between the left and right tires 11 and 11 detected by the tire detection sensor 12, the position of the center line LC1 in the width direction of the vehicle body 2a is calculated by the center detector 8a (step S105 in FIG. 3). ).

  Here, since both the left and right tires 11 on the front wheel side are in contact with the wheel stopper 10, the extending direction of the wheel stopper 10 is a direction along the width direction of the vehicle body 2a. That is, the center line LC2 of the ring stopper 10 and the center line LC1 in the width direction of the vehicle body 2a are parallel to each other. For this reason, the deviation amount Y2 of the center line LC1 in the width direction of the vehicle body 2a with respect to the center line LC2 of the wheel stopper 10 can be calculated. This deviation amount Y2 is calculated by the determination unit 19 of the specifying device 8 (step S106 in FIG. 3).

Subsequently, the position information of the secondary coil 31 stored in the control device 34 of the vehicle side charging device 3 is transmitted to the determination unit 19 as a signal. That is, the determination unit 19 determines the distance X between the center P2 of the secondary coil 31 and the front outer peripheral portion of the front tire 11 and the center line LC1 of the secondary coil 31 in the width direction of the vehicle body 2a. Is input (see step S107 in FIG. 3, FIG. 4D).
Here, since the left and right tires 11, 11 on the front wheel side are in contact with the wheel stopper 10, the distance X between the center P2 of the secondary coil 31 and the front outer peripheral portion of the tire 11 on the front wheel side is It becomes equal to the distance between the stop 10 and the center P2 of the secondary coil 31.

  Next, a distance X between the center P2 of the secondary coil 31 and the front outer peripheral portion of the tire 11 on the front wheel side, and a distance between the center P2 of the secondary coil 31 and the center line LC1 in the width direction of the vehicle body 2a. A straight line connecting the center of the hinge portion 17 of the ring stopper 10 and the center P2 of the secondary coil 31 based on Y1 and the amount of deviation Y2 of the center line LC1 in the width direction of the vehicle body 2a with respect to the center line LC2 of the ring stopper 10 The length L of T and the angle θ between the straight line T and the center line LC2 of the ring stop 10 are calculated by the determination unit 19 (see FIG. 4 (e)).

More specifically, the determination unit 19
L · sin θ = Y1 + Y2 (1)
L · cos θ = X (2)
Based on these two equations, the length L of the straight line T and the angle θ are calculated (step S108 in FIG. 3).

After calculating the length L and the angle θ of the straight line T from the expressions (1) and (2), the driving device 7 extends the arm portion 9 based on the length L and the angle θ, It rotates around the hinge part 17. Thereby, the center P2 of the secondary coil 31 and the center P1 of the primary coil 5 are matched, and the position adjustment of the primary coil 5 is completed.
When the position adjustment of the primary coil 5 is completed, an induced current is efficiently generated in the secondary coil 31. This induced current is rectified by a downverter 28 and a charger 29 mounted on the electric vehicle 2 and stored in the battery 20.

(effect)
Therefore, according to the first embodiment described above, by providing the parking facility side charging device 4 with the specifying device 8 for specifying the center P2 of the secondary coil 31, the parking device side charging device 4 at a predetermined position in the front portion of the vehicle body 2a. The center P2 of the secondary coil 31 can be specified on the basis of the positions of the left and right tires 11, 11 on the front wheel side and the position of the center line LC1 in the width direction of the vehicle body 2a. For this reason, it is not necessary to adjust the non-contact charging system 1 every time the shape or size of the electric vehicle 2 changes.

  Moreover, since the center P2 of the secondary coil 31 is specified from a position that does not change depending on the shape and size of the electric vehicle 2, that is, the position of the center line LC1 in the width direction of the left and right tires 11, 11 and the vehicle body 2a on the front wheel side. The center P2 of the secondary coil 31 can be specified with high accuracy. For this reason, the charging operation can be performed easily and reliably, and the charging operation can be performed promptly because the non-contact charging system 1 does not need to be adjusted.

  In addition, since the specific device 8 is provided with a wheel stopper 10 and functions as a detection unit that detects the positions of the left and right tires 11 on the front wheel side, the center line LC1 in the width direction of the vehicle body 2a The position can be easily detected. For this reason, it becomes possible to pinpoint the position of the secondary coil 31 reliably with a simple structure.

  Further, the control device 34 informs the position information of the secondary coil 31 as the distance X between the center P2 of the secondary coil 31 and the front outer periphery of the tire 11 on the front wheel side, the center P2 of the secondary coil 31, and the vehicle body. The distance Y1 between the center line LC1 in the width direction 2a is stored. For this reason, based on these distances X and Y1, the position of the secondary coil 31 can be specified more accurately and more quickly. Therefore, it is possible to provide the non-contact charging system 1 that can shorten the charging operation with high accuracy.

  The center of the ring stopper 10 in the longitudinal direction is supported by the support frame 16 via the hinge part 17, and the ring stopper 10 is rotatable about the hinge part 17. For this reason, even if the electric vehicle 2 enters obliquely with respect to the wheel stopper 10, that is, when the electric vehicle 2 enters obliquely with respect to the parking space S, the wheel stopper 10 and the left and right tires 11 on the front wheel side. , 11 can be reliably brought into contact with each other. Therefore, the center line LC2 of the ring stopper 10 and the center line LC1 in the width direction of the vehicle body 2a can be easily made parallel, and the center P2 of the secondary coil 31 can be specified more quickly and reliably. .

(Second embodiment)
(Non-contact charging system)
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the aspect same as 1st embodiment, and description is abbreviate | omitted.
FIG. 5 is a schematic configuration diagram of the non-contact charging system 101 in the second embodiment.
In the second embodiment, the non-contact charging system 101 includes a vehicle-side charging device 3 mounted inside the electric vehicle 2, and a parking facility-side charging device 4 provided outside the electric vehicle 2 such as a parking lot. The vehicle side charging device 3 performs transmission / reception of information between the power receiving device 32 having the secondary coil 31 that receives power supplied from the parking facility side charging device 4 and the parking facility side charging device 4. The vehicle side transmitter / receiver 33 and the control device 34 that performs various controls of the non-contact charging system 1, the parking facility side charging device 4 is for supplying power to the vehicle side charging device 3. Transmission / reception of information with the power transmission device 6 having the primary coil 5, the drive device 7 for moving the primary coil 5, the specifying device 8 for specifying the position of the secondary coil 31, and the vehicle side charging device 3. Parking facilities to do The identification device 8 includes the side transmission / reception unit 14, and the identification device 8 includes the wheel stopper 10, the center detection unit 18 for calculating the position of the center line LC <b> 1 in the width direction of the vehicle body 2 a, Basic features such as having a judgment part 19 for specifying the position of the center P2 of the next coil 31, and the longitudinal center of the ring stopper 10 being supported by the support frame 16 via the hinge part 17 The general configuration is the same as that of the first embodiment described above.

Here, the difference between the second embodiment and the first embodiment is that, in the first embodiment, the base end of the arm portion 9 constituting the drive device 7 is provided on the support frame 16 via the hinge portion 17. On the other hand, in the second embodiment, the base end of the arm portion 9 is provided at the moving portion 51.
The moving part 51 constitutes a part of the driving device 7 and enables the arm part 9 to move along the left-right direction of the vehicle body 2a (up-down direction in FIG. 5). Since the arm portion 9 is configured to be extendable and retractable, by providing the arm portion 9 in the moving portion 51, the power transmission device 6 provided at the tip of the arm portion 9 moves along the front-rear direction of the vehicle body 2a. It is possible to move along the left-right direction.

  The arm portion 9 is provided on the center line LC2 in the longitudinal direction of the ring stopper 10. Accordingly, the length L of the straight line T connecting the center of the hinge portion 17 and the center P2 of the secondary coil 31 calculated by the determination unit 19 of the parking facility side charging device 4, and the center line of the straight line T and the wheel stopper 10 Based on the angle θ with respect to the LC 2 (see FIG. 4E), the driving device 7 extends the arm portion 9, and the moving portion 51 moves the arm portion 9 in the left-right direction to move the primary coil. 5 position adjustment can be performed.

(effect)
Therefore, according to the second embodiment described above, in addition to the same effects as those of the first embodiment described above, the ring stopper 10 and the arm portion 9 can be formed as separate structures. For this reason, compared with the case where the wheel stopper 10 and the arm part 9 are integrated as in the first embodiment described above, the maintenance and the like of the non-contact charging system 101 can be facilitated.

The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention.
For example, the case where the control device 34 is provided in the vehicle-side charging device 3 and the specific device 8 is provided in the parking facility-side charging device 4 has been described. However, it is not restricted to this, The control apparatus 34 may be provided in the parking equipment side charging device 4, and the specific apparatus 8 may be provided in the vehicle side charging device 3. FIG. When the specific device 8 and the control device 34 are arranged together in either the vehicle side charging device 3 or the parking facility side power receiving device 4, the control device 34 may be configured to have the function of the specific device 8. Good.

  In the above-described embodiment, the case where the wheel stopper 10 is provided with the tire detection sensor 12 and the wheel stopper 10 functions as a front detection unit that detects the positions of the left and right tires 11 on the front wheel side is described. did. However, the present invention is not limited to this, and a predetermined position in the front portion of the vehicle body 2a can be detected, and the position of the center line LC1 in the width direction of the vehicle body 2a can be calculated based on the predetermined position. Just do it. For example, a camera capable of recognizing the front portion of the vehicle body 2a is provided separately from the wheel stopper 10, and the position of the center line LC1 may be specified based on data captured by the camera.

DESCRIPTION OF SYMBOLS 1,101 ... Non-contact charging system 2 ... Electric vehicle (vehicle) 2a ... Vehicle body 3 ... Vehicle side charging device 4 ... Parking equipment side charging device 5 ... Primary coil 6 ... Power transmission device 7 ... Drive device 8 ... Specific device 9 ... Arm part (supporting part) 10 ... Wheel stopper (front part detecting part) 17 ... Hinge part (fulcrum part) 18 ... Center detecting part 19 ... Judging part 31 ... Secondary coil 32 ... Power receiving device 51 ... Moving part LC1, LC2 ... Center line P1, P2 ... Center X, Y1 ... Distance Y2 ... Deviation amount

Claims (5)

A power transmission device having a primary coil for supplying power by electromagnetic induction;
A power receiving device having a secondary coil that electromagnetically couples with the power transmitting device to receive power;
A specifying device for specifying the position of the secondary coil of the power receiving device;
A driving device that moves the power transmission device to a position specified by the specifying device and aligns the primary coil at a position corresponding to the secondary coil;
The specific device is:
A front detection unit for detecting a predetermined position in a vehicle including the power receiving device;
A center detector for detecting the center in the width direction of the vehicle;
And a determination unit that specifies a position of the secondary coil based on a predetermined position detected by the front detection unit and a center position in the width direction detected by the center detection unit. And contactless charging system. The specific device includes a wheel stopper for stopping the vehicle,
The front detection unit detects the predetermined position from a position where the vehicle contacts the wheel stop,
The center detection unit detects the center position in the width direction from a range in which the vehicle contacts the wheel stop,
The determination unit acquires position information of the secondary coil from the vehicle side, and based on the position information of the secondary coil, the detected predetermined position, and the center position in the width direction, the secondary coil The contactless charging system according to claim 1, wherein a position of the coil is specified. The position information of the secondary coil includes distance information in the length direction between the predetermined position and the center position of the secondary coil, and between the center position in the width direction and the center position of the secondary coil. And distance information in the width direction,
The determination unit
Based on the distance information in the length direction and the predetermined position detected by the front detection unit, the position in the length direction of the secondary coil is specified,
The position in the width direction of the secondary coil is specified based on the distance information in the width direction and the center position in the width direction detected by the center detection unit. Contact charging system. The wheel stopper is provided so as to be rotatable around a fulcrum part,
The drive device is provided with a strut that is provided to be extendable and capable of supporting the power transmission device on one end side,
4. The non-contact charging system according to claim 2, wherein the other end side of the support column and the wheel stopper are rotatably connected via the fulcrum part. 5. The wheel stopper is provided so as to be rotatable around a fulcrum part,
The driving device includes:
A strut that is provided so as to be stretchable along a direction intersecting with the extending direction of the ring stopper, and can support the power transmission device on one end side,
The other end side of the said support | pillar part is connected, The moving part which can move the said support | pillar part along the extension direction of the said ring stop is provided, The Claim 2 or Claim 3 characterized by the above-mentioned. Non-contact charging system.

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