JP2015082849A - Feeding coil unit and non-contact power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding coil unit capable of preventing positional deviation between a feeding coil and a power receiving coil without damaging tires while simplifying design or a laying method, and a non-contact power supply device with such a feeding coil unit.SOLUTION: A feeding coil unit 10 includes a feeding coil 11 for supplying power to a power receiving coil 21 that is mounted on a vehicle 2, without contact and is installed at a parking place 3 of the vehicle 2. The feeding coil unit 10 supports the feeding coil 11 and also includes a guide part 12 for guiding the feeding coil 11 to a position opposing the power receiving coil 21 when the vehicle approaches the parking place 3. The guide part 12 is freely movable at least in a vehicle width direction of the vehicle 2 in the case where the vehicle 2 is parked at the parking place 3. A width of the guide part 12 in the vehicle width direction is widened from a rear side in a direction of travel of the vehicle to a front side in the direction of travel in the case of approach. A maximum width of the guide part 12 is narrower than a tire interval in the vehicle width direction of the vehicle 2.

Description

  The present invention has a power supply coil that supplies power to a power receiving coil mounted on a vehicle in a contactless manner, and is provided with a power supply coil unit that is installed at a parking place of the vehicle, and a non-contact power supply device including such a power supply coil unit It is about.

  In recent years, a non-contact power supply device that supplies power to, for example, an electric vehicle battery without mechanical contact such as a cable has been developed and put into practical use. This non-contact power feeding device includes a power receiving coil mounted on a vehicle and a power feeding coil that powers the power receiving coil in a non-contact manner.

  FIG. 8 is a schematic diagram showing a conventional non-contact power feeding apparatus. In the non-contact power feeding device 5 shown in FIG. 8, the vehicle 6 is parked in the parking place 7, and the power supply coil 51 and the power receiving coil 52 are opposed to each other with a gap therebetween, and the inverter 54 is connected from the power source 53. AC power is supplied to the power supply coil 51 through the power supply. Then. The AC power is fed from the feeding coil 51 to the receiving coil 52 in a non-contact manner due to electromagnetic induction between the coils and magnetic field resonance. The AC power supplied to the power receiving coil 52 is supplied to the secondary battery 61 via the charging circuit 55 and charged. From the secondary battery 61, AC power is supplied via an inverter 65 to a motor 64 as a drive source together with the engine 63.

  Here, depending on the parking position of the vehicle 6, a positional deviation occurs between the power feeding coil 51 and the power receiving coil 52. For the longitudinal direction of the vehicle, for example, it is possible to avoid the positional deviation relatively easily by using facilities usually provided in a parking place such as a car stop. Often some kind of ingenuity is required. FIG. 9 is a diagram illustrating a positional relationship between the power feeding coil and the power receiving coil illustrated in FIG. 8 in the vehicle width direction. FIG. 8A shows a state in which no positional deviation occurs in the vehicle width direction between the power feeding coil 51 and the power receiving coil 52, and FIG. 8B shows the power feeding coil 51, the power receiving coil 52, and the like. A state in which a positional deviation occurs in the vehicle width direction is shown. When the misalignment occurs, the transmission distance D between the power feeding coil 51 and the power receiving coil 52 changes as shown in FIG. 9, and this causes a change between the power feeding coil 51 and the power receiving coil 52. Impedance and transmission coefficient change. Then, problems such as an increase in the leakage magnetic field, a decrease in power supply efficiency, and heat generation in the power supply coil 51 occur between the power supply coil 51 and the power reception coil 52. If the non-contact power supply device 5 is designed in consideration of these problems as a design margin in advance, the design work becomes very difficult. For this reason, in such a non-contact power feeding device 5, it is important to take measures against positional deviation in the vehicle width direction between the power feeding coil 51 and the power receiving coil 52. Conventionally, it is proposed that the parking place 7 is provided with a guide for guiding the vehicle 6 to a position without a deviation in which the positional deviation in the vehicle width direction between the power feeding coil 51 and the power receiving coil 52 is within an allowable range as follows. Has been.

  FIG. 10 is a diagram illustrating an example of a guide for guiding the vehicle to a position without deviation. In the example of FIG. 10, the following guide 54 is attached to the power supply coil 51 fixed to the parking place 7 to configure a power supply coil unit 55 (see, for example, Patent Document 1). The feeding coil unit 55 is fixed to the ground of the parking place 7. The guide 54 has a shape in which the width increases from the rear in the approach direction of the vehicle 6 to the front in the approach direction when entering the parking place 7. When the vehicle 6 enters the parking place 7, the guide 54 enters between the left and right tires 66 and abuts against the tires 66 from the inside while guiding the vehicle 6 to a position without displacement.

  FIG. 11 is a diagram illustrating another example of a guide for guiding a vehicle to a position without displacement. In FIG. 11, contrary to FIG. 10, the upper side in the figure is the forward direction of the vehicle 6 when entering the parking place 7, and the lower side in the figure is the backward direction of the vehicle 6. In the example of FIG. 11, the power receiving coil 52 ′ is provided at the rear end of the vehicle 6, and the power feeding coil 51 ′ is provided at a position facing the power receiving coil 52 ′ at the rear end. And the following guides 71 are attached to the parking place 7 (for example, refer patent document 2). The guide 71 includes two arms 711 fixed to the ground of the parking place 7, and the width of each arm 711 is widened from the rear of the vehicle 6 in the approach direction to the front of the approach direction. When the vehicle 6 enters the parking place 7, the guide 71 enters between the left and right tires 66 and abuts against the tires 66 from the inside while guiding the vehicle 6 to a position without displacement.

JP-A-9-172743 JP 2013-110955 A

  However, in order to prevent the above-described conventional misalignment, the vehicle can be guided, and the guide or the power supply coil unit with the guide must be laid in a parking place so strong that the vehicle does not break even if it comes into contact with the tire 6. There was a problem that their design and laying method was difficult. Further, there is a problem that such a strong guide may damage the tire.

  Therefore, the present invention provides a power supply coil unit that is simple in design and laying method and can suppress positional deviation between the power supply coil and the power reception coil without damaging the tire, and a non-contact power supply device including such a power supply coil unit. The purpose is to provide.

  In order to solve the above-described problem, a power supply coil unit according to claim 1 includes a power supply coil that supplies power to a power receiving coil mounted on a vehicle in a contactless manner, and is installed in a parking place of the vehicle. And a guide part that supports the power supply coil and guides the power supply coil to a position facing the power receiving coil when the vehicle enters the parking place, and the guide part is at least in the parking place. The vehicle is movable in the vehicle width direction when the vehicle is parked, and the width in the vehicle width direction is widened from the rear in the traveling direction to the front in the traveling direction of the vehicle when entering, and the maximum width is The tire is narrower than the tire interval in the vehicle width direction of the vehicle.

  According to a second aspect of the present invention, in the power supply coil unit according to the first aspect, the guide portion has a substantially V shape having two arms, and the two power supply coils are the two power supply coils. It is arrange | positioned at the connection part of this arm.

  According to a third aspect of the present invention, in the power feeding coil unit according to the first or second aspect, the guide portion has an inclined surface inclined toward the inner side of the guide portion toward the upper side at the outer edge thereof. It is formed.

  The power supply coil unit according to claim 4 is the power supply coil unit according to any one of claims 1 to 3, wherein the guide portion includes a wheel, and the guide portion is at least the above by the wheel. It is characterized by being movable in the vehicle width direction.

  The feeding coil unit according to claim 5 is the feeding coil unit according to any one of claims 1 to 4, wherein the guide portion is provided by a guide rail provided in the parking place and extending in the vehicle width direction. , And is slidably supported in the vehicle width direction.

  In order to solve the above-mentioned problem, the non-contact power feeding device according to claim 6 includes a power receiving coil mounted on a vehicle and a power feeding coil that supplies power to the power receiving coil in a non-contact manner. The power feeding coil unit according to any one of claims 1 to 6, wherein the power feeding coil unit is installed.

  According to the power supply coil unit described in claim 1, the width of the vehicle width direction is widened from the rear of the vehicle in the traveling direction to the front of the traveling direction, and the maximum width is narrower than the tire interval in the vehicle width direction. When the vehicle enters the parking place, the power feeding coil is guided by the unit to a position facing the power receiving coil. The guide part comes into contact with the tire when the vehicle enters, and the impact at the time of contact with the tire is absorbed by the movement of the guide part. For this reason, the guide portion does not need to be made as strong as the guides 54 and 71 shown in FIG. 10 and FIG. 11 fixed to the parking place. As a result, compared with these guides 54 and 71, the design and laying method of this guide part becomes simple. Further, since the guide portion is not as strong as the guides 54 and 71, the guide portion can guide the power feeding coil without damaging the tire. Thus, according to the power supply coil unit described in claim 1, the design and laying method are simple, and positional deviation in the vehicle width direction between the power supply coil and the power reception coil can be suppressed without damaging the tire.

  According to the power supply coil unit described in claim 2, the two arms are brought into contact with the tire to guide the power supply coil. For this reason, the arm has a certain degree of flexibility, and when it comes into contact with the tire, the arm can be pushed and deformed by the tire to further improve the shock absorption in combination with the movement of the feeding coil. Can be made.

  According to the power supply coil unit described in claim 3, the contact area between the tire when the vehicle enters and the outer edge of the guide portion that comes into contact with the tire is widened by the inclined surface. As a result, the movement of the guide portion when pushed by the tire becomes smooth. In addition, such a large contact area suppresses the riding of the tire on the guide portion.

  According to the power supply coil unit described in claim 4, the movement of the guide unit is smoother than the case where, for example, the bottom surface of the guide unit is in direct contact with the ground of the parking place. .

  According to the power supply coil unit described in claim 5, the guide rail and the power supply coil are guided by the guide rail in the vehicle width direction while restricting the movement in the front-rear direction perpendicular to the vehicle width direction. be able to.

  According to the non-contact power feeding device described in claim 6, since the power feeding coil unit is the power feeding coil unit according to any one of claims 1 to 5, the design and laying method are simple. The positional deviation in the vehicle width direction between the power feeding coil and the power receiving coil can be suppressed without damaging the tire.

It is a schematic diagram which shows the non-contact electric power feeder provided with the electric power feeding coil unit concerning embodiment of this invention. FIG. 2 is an enlarged view of the feeding coil unit shown in FIG. 1. It is an expanded sectional view along the AA line in a figure of the right arm among the two arms shown by FIG. It is a figure which shows the positional relationship of a feeding coil and a receiving coil in the initial stage of approach to the parking place of a vehicle. It is a figure which shows the positional relationship of a power feeding coil and a receiving coil in the step into which the vehicle approached until the tire contact | abutted to the vehicle stop. It is a figure which shows a mode that the movement to the front of a guide part is controlled using a vehicle stop. It is a figure which shows a mode that the movement to the front of a guide part is controlled using a guide rail. It is a schematic diagram which shows the conventional non-contact electric power feeder. It is a figure which shows the positional relationship about the vehicle width direction of the feed coil and receiving coil which are shown by FIG. It is a figure which shows an example of the guide which guides a vehicle to a position without a gap. It is a figure which shows another example of the guide which guides a vehicle to a position without deviation.

  A non-contact power feeding apparatus according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a schematic diagram illustrating a non-contact power feeding device including a power feeding coil unit according to an embodiment of the present invention. The non-contact power feeding device 1 shown in FIG. 1 includes a power receiving coil 21 mounted on a vehicle 2 and a power feeding coil unit 10 installed in a parking place 3. The feeding coil unit 10 includes a feeding coil 11 and a guide unit 12. The power supply coil 11 supplies power to the power receiving coil 52 in a non-contact manner by electromagnetic induction between the coils and magnetic field resonance. The guide unit 12 supports the power feeding coil 11 and guides the power feeding coil 11 to a position facing the power receiving coil 21 when the vehicle 2 enters the parking place 3. The guide 12 is movable in the vehicle width direction of the vehicle 2 when the vehicle 2 is parked at the parking place 3. The non-contact power feeding device 1 includes a power source and an inverter that are embedded in the parking place 3 and supplies AC power to the power feeding coil 11. These configurations are, for example, the conventional ones described with reference to FIG. 8. This is the same as the non-contact power supply device 5. For this reason, illustration is abbreviate | omitted in FIG. 1 and FIGS. 2-7 mentioned later, and the description about these structures is omitted below.

  FIG. 2 is an enlarged view of the feeding coil unit shown in FIG. In the present embodiment, the power supply coil 11 provided in the power supply coil unit 10 is not fixed to the parking place 3 shown in FIG. 1, and as described above, in the vehicle width direction of the vehicle 2 during parking. It is supported by a movable guide part 12. The guide portion 12 has a substantially V shape having two arms 121, and the power feeding coil 11 is disposed at a connection portion between the two arms 121. The width of the guide portion 12 in the vehicle width direction B2 of the vehicle 2 at the time of parking increases from the rear in the traveling direction of the vehicle 2 when approaching the traveling direction indicated by the arrow S to the parking place 3 toward the front in the traveling direction. It has a shape. The maximum width W1 is narrower than the interval W2 between the tires 22 in the vehicle width direction of the vehicle 2.

  FIG. 3 is an enlarged cross-sectional view of the right arm of the two arms shown in FIG. 2 along the line AA in the drawing. As shown in FIG. 3, a wheel 122 is attached to the arm 121 so that a part of the arm 121 protrudes from the lower surface. A plurality of wheels 122 are arranged at predetermined intervals in the direction in which the arm 121 extends. The wheel 122 has an axle substantially parallel to the front-rear direction B <b> 1 of the parking place 3. Thereby, the guide part 12 is movable in said vehicle width direction B2. On the other hand, since the axle of the wheel 122 is substantially parallel to the front-rear direction B1, the guide portion 12 is difficult to move in the front-rear direction B1. As shown in FIGS. 1 and 2, the parking place 3 is provided with two vehicle stops 31 on which the two tires 22 on the rear side of the vehicle 2 abut. The guide portion 12 is placed at the parking place 3 with the tips of the two arms 121 in contact with the vehicle stops 31. Thereby, this guide part 121 is further restricted from moving back in the front-rear direction B1. As shown in FIG. 3, the guide portion 12 has an inclined surface 123 formed on the outer edge thereof that is inclined inward toward the guide portion 12 as it goes upward.

  Next, how the power feeding coil 11 is guided to a position corresponding to the power receiving coil 21 by the guide 12 when the vehicle 2 enters the parking place 3 will be described with reference to FIGS. 4 and 5. FIG. 4 is a diagram showing a positional relationship between the power feeding coil and the power receiving coil at the initial stage of entering the parking place of the vehicle. FIG. 5 is a diagram showing power feeding when the vehicle enters until the tire comes into contact with the vehicle stop. It is a figure which shows the positional relationship of a coil and a receiving coil. In the example of FIGS. 4 and 5, the vehicle 2 enters the parking place 3 with a shift to the left. 4 and 5, only the tire 22 and the power receiving coil 21 are shown for the vehicle 2 so that the power feeding coil unit 10 hidden under the vehicle 2 during parking can be easily seen.

  In this example, the right arm 121 of the two arms 121 of the guide unit 12 comes into contact with the right tire 22 of the rear tires 22 of the vehicle 2 that has entered the parking place 3 from the inside. Then, as the vehicle 2 enters, the right arm 121 is pushed by the tire 22, so that the guide portion 12, and thus the feeding coil 11, moves to the left as indicated by the arrow B3 in FIG. Moving. By this movement, the power feeding coil 11 is directed to a position facing the power receiving coil 21 of the vehicle 2.

  Thus, according to the power feeding coil unit 10 and the non-contact power feeding device 1 of the present embodiment, when the vehicle 2 enters the parking place 3, the power feeding coil 11 is moved by the guide portion 12 that is movable in the vehicle width direction B2. Then, it is guided to a position facing the power receiving coil 21. The guide portion 12 abuts on the tire 22 when the vehicle 2 enters, but the impact at the time of abutment on the tire 22 is absorbed by the movement of the guide portion 12. For this reason, the guide part 12 does not need to be made as strong as the guides 54 and 71 shown in FIG. 10 and FIG. 11 fixed to the parking place. As a result, compared with these guides 54 and 71, the design and laying method of the guide portion 12 are simpler. Furthermore, since the guide part 12 does not need to be as strong as the guides 54 and 71, the guide part 12 can guide the power feeding coil 11 without damaging the tire 22. Thus, according to the power feeding coil unit 10 and the non-contact power feeding device 1 of the present embodiment, the position in the vehicle width direction B2 between the power feeding coil 11 and the power receiving coil 21 is simple and can be designed and installed without damaging the tire 22. Misalignment can be suppressed.

  Further, according to the power supply coil unit 10 and the non-contact power supply device 1 of the present embodiment, the two arms 121 are in contact with the tire 22 to guide the power supply coil 11. In this embodiment, the arm 121 is made of resin and has a certain degree of flexibility. As a result, the arm 121 is pushed and deformed by the tire 22 when contacting the tire 22, so that the impact is further absorbed in combination with the movement of the feeding coil 11.

  Further, in the power supply coil unit 10 and the non-contact power supply device 1 according to the present embodiment, as illustrated in FIG. 3, the inclination is inclined toward the inner side of the guide portion 12 toward the outer edge of the guide portion 12. A surface 123 is formed. The inclined surface 123 widens the contact area between the tire 22 when the vehicle 2 enters and the outer edge of the guide portion 12 that contacts the tire 22. As a result, the movement of the guide portion 12 when the tire 22 is pushed with this wide contact area becomes smooth. Moreover, the riding of the tire 22 on the guide part 12 is suppressed by such a large contact area.

  Further, according to the power supply coil unit 10 and the non-contact power supply device 1 of the present embodiment, for example, the bottom surface of the guide unit 12 is grounded at the parking place 3 by the plurality of wheels 122 attached to the lower surface of the arm 121 of the guide unit 12. Compared to the case where the guide unit 12 is in direct contact, the movement of the guide unit 12 becomes smoother.

  In this embodiment, regarding the positional deviation of the guide portion 12 in the front-rear direction B1 at the parking place 3, basically, the axle of the wheel 122 is assumed to be along the front-rear direction B1, and the front-rear direction B1. Is suppressed by making it difficult to move. And especially the movement of the guide part 12 to back is controlled by making the front-end | tip of the two arms 121 contact | abut to the vehicle stop 31 provided in the parking place 3. FIG.

  Here, the forward movement of the guide portion 12 may also be regulated using a car stopper as follows. FIG. 6 is a diagram illustrating a state in which the forward movement of the guide unit is restricted by using a car stop. In the example of FIG. 6, the vehicle stopper 32 is arranged so that the apex portion of the guide portion 12 having a substantially V shape contacts. The length of the vehicle stop 32 in the vehicle width direction B2 is shorter than the interval of the tire 22 in the vehicle width direction B2 so as not to prevent the vehicle 2 from entering. By this vehicle stop 32, the guide unit 12 is also restricted from moving forward in the front-rear direction B1.

  Moreover, you may regulate the movement to the front of the guide part 12 using the following guide rails. FIG. 7 is a diagram illustrating a state in which the forward movement of the guide unit is regulated using the guide rail. In the example of FIG. 7, two guide rails 33 extending under the apex portion of the guide portion 12 along the vehicle width direction B <b> 2 are embedded in the parking place 3. These guide rails 33 are formed with grooves extending in the vehicle width direction B <b> 2, and the lower surface of the apex portion of the guide portion 12 protrudes toward the ground and fits into the grooves of each guide rail 33 (not shown). Protrusions are provided. As a result, the guide portion 12 is supported so as to be slidable in the vehicle width direction B2, and the movement in both the front and rear directions is restricted in the front and rear direction B1. According to the guide rail 33, the guide portion 12, and hence the power feeding coil 11, can be guided in the vehicle width direction B <b> 2 while restricting movement in the front-rear direction B <b> 1.

  The above-described embodiment is merely a representative form of the present invention, and the present invention is not limited to this embodiment. That is, various modifications can be made without departing from the scope of the present invention.

  For example, in this embodiment, the guide part 12 which has the substantially V shape which has the two arms 121 is illustrated as an example of the guide part said to this invention. However, the guide portion referred to in the present invention is not limited to this, and if the width in the vehicle width direction of the vehicle at the time of parking is widened from the rear in the traveling direction of the vehicle at the time of entry to the front in the traveling direction, for example, It may be a triangle or a trapezoid.

DESCRIPTION OF SYMBOLS 1 Non-contact electric power feeder 2 Vehicle 3 Parking place 10 Power supply coil unit 11 Power supply coil 12 Guide part 21 Power receiving coil 22 Tire 31, 32 Car stop 33 Guide rail 121 Arm 122 Wheel 123 Inclined surface

Claims (6)

In a power supply coil unit that has a power supply coil that supplies power to a power reception coil mounted on a vehicle in a contactless manner, and is installed at a parking place of the vehicle,
A guide unit that supports the power feeding coil and guides the power feeding coil to a position facing the power receiving coil when the vehicle enters the parking place;
The guide part is movable at least in the vehicle width direction of the vehicle when the vehicle is parked at the parking place, and the vehicle width direction of the vehicle from the rear in the traveling direction to the front in the traveling direction at the time of entry. A feeding coil unit having a wide width and a maximum width smaller than a tire interval in the vehicle width direction of the vehicle. The guide portion has a substantially V shape having two arms,
The feeding coil unit according to claim 1, wherein the feeding coil is disposed at a connection portion between the two arms.   The feeding coil unit according to claim 1 or 2, wherein an inclined surface that is inclined toward the inside of the guide portion as it goes upward is formed on an outer edge of the guide portion.   The power supply according to any one of claims 1 to 3, wherein the guide part includes a wheel, and the guide part is movable at least in the vehicle width direction by the wheel. Coil unit.   The said guide part is supported at the said parking place by the guide rail extended in the said vehicle width direction so that a slide movement is possible in this vehicle width direction, The any one of Claim 1 to 4 characterized by the above-mentioned. The feeding coil unit described in 1. A power receiving coil mounted on the vehicle;
The power supply coil unit according to any one of claims 1 to 5, wherein the power supply coil includes a power supply coil that supplies power to the power reception coil in a non-contact manner, and is installed at a parking place of the vehicle.
A non-contact power feeding device comprising:

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