JP2013126351A - Non-contact power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact power supply device which has high versatility and high power transmission efficiency.SOLUTION: A non-contact power supply device 1 comprises: a power supply region R1 which supplies power by coming into contact with a power receiving region R2 of a vehicle 9; a buffer part 2; and a power supply part 3 which is arranged on the buffer part 2 so as to face the power receiving region R2 and has a conductive portion 30 containing an elastomer and a conductive material. The power supply region R1 is deformed along the shape of the power receiving region R2 by deformation of the buffer part 2 and the power supply part 3.

Description

  The present invention relates to a non-contact power feeding device such as a capacitance type or an electromagnetic induction type.

  Among contactless power supply devices, there is a capacitance-type contactless power supply device in which a capacitor is formed between a power supply side electrode and a power reception side electrode and power is supplied by electrostatic capacitance (for example, Patent Documents). 1). In addition, there is an electromagnetic induction type non-contact power supply device that supplies electric power using electromagnetic induction between a coil on a power feeding side and a coil on a power receiving side (see, for example, Patent Documents 2 to 4).

  The non-contact power feeding device is disposed on a road surface of a parking lot, for example. A power feeding region is arranged on the upper surface of the non-contact power feeding device. On the other hand, a power receiving area is disposed on the lower surface of the vehicle.

JP 2009-89520 A JP-A-9-213378 JP 2009-95072 A JP 2011-151351 A

  As an example, in the case of an electromagnetic induction type non-contact power feeding device, the power feeding area is brought into contact with the power receiving area when power is supplied. The power supply side coil and the power reception side coil are electromagnetically coupled to supply power to the vehicle battery (secondary battery).

  Here, if the coil on the power feeding side and the coil on the power receiving side are separated from each other, the power transmission efficiency is significantly reduced. For this reason, it is necessary to bring the power feeding area and the power receiving area into close contact with each other. Therefore, both the power feeding area and the power receiving area need to be flat surfaces. Thus, the power feeding area and the power receiving area can be brought into close contact with each other.

  However, it is difficult to secure a large flat surface on the lower surface of the vehicle from the viewpoint of measures against air resistance and stepping stones. For this reason, it is difficult to bring the power feeding region and the power receiving region into close contact with each other. Here, it is conceivable to form the power feeding region and the power receiving region symmetrically. For example, it is also conceivable that the power feeding area of the non-contact power feeding device has a convex shape and the power receiving area of the vehicle has a concave shape that is symmetrical to the convex shape. However, in this case, when power is supplied to a vehicle in which the shape of the power receiving area is not concave, the power transmission efficiency is significantly reduced. That is, it lacks versatility.

  In this regard, Patent Document 4 discloses an electromagnetic induction type non-contact power supply device including a flexible power supply side core and a power reception side core. The power supply side core and the power reception side core are each made of a soft magnetic material. The soft magnetic material is formed by dispersing a soft magnetic material in at least one of rubber and resin. According to the non-contact power feeding device described in the same document, even if the flat surface at the upper end of the power feeding side core and the flat surface at the lower end of the power receiving side core are not parallel to each other, the power feeding side core and the power receiving side core are deformed. By doing so, the power feeding side core and the power receiving side core can be brought into surface contact.

  However, in the case of the non-contact power feeding device of Patent Document 4, the conductive portion (power feeding side coil, power receiving side coil) itself is not deformed. For this reason, the power feeding side coil and the power receiving side coil are easily separated from each other. Therefore, the power transmission efficiency tends to decrease.

  The non-contact power feeding device of the present invention has been completed in view of the above problems. An object of this invention is to provide the non-contact electric power feeder with high versatility and high power transmission efficiency.

  (1) In order to solve the above-described problem, a contactless power supply device according to the present invention is a contactless power supply device including a power supply region that supplies power by contacting a power receiving region of a vehicle. And a power feeding part that is disposed opposite to the power receiving area and has a conductive part including an elastomer and a conductive material, and the power feeding area is formed by deforming the buffer part and the power feeding part. The power receiving area is deformed following the shape of the power receiving area.

  Here, in the form in which the power feeding unit is “arranged opposite to the power receiving area”, when the power feeding area is arranged on the surface of the power feeding part, the form in which the power feeding part and the power receiving area are directly facing each other. included. In addition, when the power feeding region is arranged on the surface of the separate member, a form in which the power feeding unit and the power receiving region face each other indirectly through the separate member is included.

  According to the contactless power feeding device of the present invention, the conductive portion (for example, an electrode, a coil, etc.) of the power feeding portion contains an elastomer. For this reason, the power feeding unit is flexible. Therefore, when the power feeding area and the power receiving area are in contact with each other, the buffer section and the power feeding section are deformed, so that the power feeding area can be deformed following the shape of the power receiving area.

  According to the non-contact power feeding device of the present invention, the contact area of the interface between the power feeding region and the power receiving region can be widened. For this reason, power transmission efficiency becomes high. Further, the power feeding area can be elastically contacted with the power receiving area by the urging force of the flexible buffer part and the power feeding part. For this reason, the power feeding area can be brought into close contact with the power receiving area when power is supplied.

  Moreover, according to the non-contact power feeding device of the present invention, the power feeding area can be freely deformed following the shape of the power receiving area. For this reason, the freedom degree of design of the shape of a receiving area becomes high. Moreover, high power transmission efficiency can be ensured regardless of the vehicle type. That is, the versatility with respect to a vehicle type becomes high.

  (1-1) Preferably, in the configuration of (1) above, the power feeding region is arranged closer to the power receiving region among the surface of the buffer portion and the surface of the power feeding portion. Good. According to this configuration, the power supply region closer to the power reception region can be set according to the positional relationship between the buffer portion surface and the power supply portion surface.

  (2) Preferably, in the configuration of (1) above, the buffer portion is a gas-filled airbag portion. Hereinafter, a direction in which the power receiving region and the power feeding region overlap is defined as an “overlapping direction”, and a direction orthogonal to the overlapping direction is defined as an “orthogonal direction”. Compared to liquid, gas is highly compressible. For this reason, according to this structure, even if it is a case where the wall part by the side of the electric power reception area | region of an airbag part deform | transforms, the influence which the said deformation | transformation has on the other wall part of an airbag part is small. Therefore, the airbag portion is not easily deformed in the orthogonal direction.

  In addition, according to the present configuration, even if the relative positional relationship between the vehicle and the non-contact power feeding device is shifted after the power feeding region and the power receiving region are in contact with each other, the power feeding region and the power receiving region are not easily displaced. . The reason is that the position shift can be absorbed by the inclination of the wall portion in the orthogonal direction of the airbag portion. Thus, according to this configuration, the power feeding region and the power receiving region are unlikely to be in sliding contact.

  (3) Preferably, in the configuration of (1) or (2), the conductive portion is a coil or an electrode. In this configuration, the contactless power supply device of the present invention is embodied as an electromagnetic induction type or electrostatic capacitance type contactless power supply device.

  According to this configuration, at the time of power supply, the power supply side coil and the power reception side coil are not easily separated. In addition, at the time of power supply, the electrode on the power feeding side and the electrode on the power receiving side are not easily separated.

  (4) Preferably, in any one of the configurations (1) to (3), a drive unit that can connect and disconnect the power feeding region with respect to the power receiving region is better. According to this configuration, the power feeding area can be moved relative to the power receiving area. In addition, the elastic contact force of the power feeding area with respect to the power receiving area can be adjusted.

  (5) Preferably, in the configuration of the above (4), the direction in which the power receiving region and the power feeding region overlap is defined as the overlapping direction, and the direction orthogonal to the overlapping direction is defined as the orthogonal direction, and the driving unit receives human power. And a link mechanism unit connected to the input unit and reciprocating in the overlapping direction.

  According to this configuration, the power feeding area can be moved manually. For this reason, a non-contact electric power feeder can be easily installed compared with the case where an electric power feeding area | region is moved with electric power. Therefore, the non-contact power feeding device can be easily used even in a general home. In addition, since the power feeding area is moved manually, the manufacturing cost of the contactless power feeding device can be reduced. Further, the structure of the non-contact power feeding device can be simplified. Further, according to this configuration, the power feeding area can be reciprocated in the overlapping direction. For this reason, compared with the case where an orthogonal direction component is contained in the track | orbit of an electric power feeding area | region, an electric power feeding area | region and an electric power receiving area | region are hard to slide.

  (6) Preferably, in any one of the configurations (1) to (5), a configuration is provided that includes a positioning unit that determines the position of the vehicle so that the power feeding region and the power receiving region abut when power is supplied. Better to do. According to this configuration, it is possible to easily align the power feeding area and the power receiving area.

  ADVANTAGE OF THE INVENTION According to this invention, a non-contact electric power feeder with high versatility and high power transmission efficiency can be provided.

It is an arrangement plan of the non-contact electric power feeder of a first embodiment. It is an enlarged view in the frame II of FIG. It is a perspective view of the part above the drive part of the non-contact electric power feeder. It is a block diagram of the non-contact power feeding device. It is a left view in the contact state of the non-contact electric power feeder. FIG. 6 is an enlarged view in a frame VI of FIG. 5. FIG. 3 is an enlarged view of the vicinity of the airbag unit when the relative positional relationship between the vehicle and the contactless power supply device of the contactless power supply device is shifted. It is a left view of the part above the drive part of the non-contact electric power feeder of 2nd embodiment. It is a left view (sectional drawing) of the airbag part of the non-contact electric power feeder of 3rd embodiment. It is a left view (sectional drawing) of the buffer part of the non-contact electric power feeder of 4th embodiment. It is a perspective view of the part above the drive part of the non-contact electric power feeder of 5th embodiment.

  Hereinafter, embodiments of the contactless power feeding device of the present invention will be described.

<First embodiment>
[Arrangement of contactless power supply device]
First, the arrangement of the contactless power supply device of this embodiment will be described. In the embodiments described below, the vertical direction corresponds to the “overlapping direction” of the present invention. Further, the horizontal direction, the front-rear direction, and the left-right direction correspond to the “orthogonal direction” of the present invention.

  FIG. 1 shows a layout diagram of the contactless power supply device of the present embodiment. As shown in FIG. 1, the non-contact electric power feeder 1 of this embodiment is arrange | positioned in the parking space of a general household. A front wheel 91 of the vehicle 9 rides on the contactless power supply device 1. In this state, the battery (secondary battery) of the vehicle 9 is charged.

[Mechanical configuration of contactless power supply]
Next, the mechanical configuration of the contactless power supply device of this embodiment will be described. FIG. 2 shows an enlarged view in the frame II of FIG. As illustrated in FIGS. 1 and 2, the contactless power supply device 1 includes an airbag unit 2, a power supply unit 3, a drive unit 4, a base 5, and a power supply region R <b> 1.

  The base 5 is made of rubber and has a plate shape. The base 5 is placed in the parking space. A pair of left and right positioning portions 50 are recessed in the front portion of the upper surface of the base 5. The front wheel 91 of the vehicle is accommodated in the positioning unit 50. That is, the vehicle 9 is positioned by the positioning unit 50.

  In FIG. 3, the perspective view of the part above the drive part of the non-contact electric power feeder of this embodiment is shown. As shown in FIGS. 1 to 3, the drive unit 4 includes an input unit 40 and a link mechanism unit 41. The link mechanism portion 41 includes a first wall portion 410, a second wall portion 411, five first arms 412, and five second arms 413.

  The first wall portion 410 is made of metal and has a rectangular plate shape. The first wall portion 410 is disposed on the upper surface of the base 5. Five support portions 410 a are arranged on the upper surface of the first wall portion 410. The five support portions 410 a are disposed at the four corners and the center of the first wall portion 410.

  The second wall portion 411 is made of metal and has a rectangular plate shape. The second wall portion 411 is disposed immediately above the first wall portion 410. Each of the first wall portion 410 and the second wall portion 411 extends in the horizontal direction. The first wall portion 410 and the second wall portion 411 are parallel to each other. Five support portions 411 a are disposed on the lower surface of the second wall portion 411. The five support portions 411 a are disposed at the four corners and the center of the second wall portion 411. The five support portions 410a and the five support portions 411a face each other in the vertical direction.

  The first arm 412 is made of metal and has a beam shape. The lower end of the first arm 412 is swingably attached to the support portion 410 a of the first wall portion 410. The second arm 413 is made of metal and has a beam shape. The upper end of the second arm 413 is swingably attached to the support part 411a of the second wall part 411. The upper end of the first arm 412 and the lower end of the second arm 413 are connected to each other so as to be swingable.

  The input unit 40 includes a lever 400 and a shaft 401. The shaft 401 is made of metal and has a round bar shape. The shaft 401 extends in the left-right direction. The right end of the shaft 401 is fixed to the lower end of the central first arm 412 in the central support portion 410 a of the first wall portion 410. The lever 400 is made of metal and has a beam shape. The lever 400 extends in the vertical direction. The lower end of the lever 400 is fixed to the left end of the shaft 401. A grip 400 a protrudes from the upper end of the lever 400.

  As shown by a dotted line in FIG. 2, when the operator holds the grip 400 a and swings the lever 400 downward, the central first arm 412 swings upward via the shaft 401. Here, the moving direction of the second wall portion 411 is limited to the vertical direction by the first arm 412 and the second arm 413 at the four corners. For this reason, the 2nd wall part 411 moves upwards. The movement amount of the second wall portion 411 can be adjusted by the swing amount of the lever 400. When the lever 400 is swung in the reverse direction (upward), the second wall portion 411 moves downward.

  The airbag portion 2 is made of silicone rubber and has a bag shape (cuboid box shape). The airbag part 2 is disposed on the upper surface of the second wall part 411. The air bag portion 2 is filled with air at a predetermined air pressure.

  In FIG. 4, the block diagram of the non-contact electric power feeder of this embodiment is shown. As shown in FIGS. 1 to 4, the power feeding unit 3 includes a pair of front and rear electrodes 30, an AC power supply 31, and a cover film 32. The electrode 30 includes amine-crosslinked acrylic rubber and silver particles. Amine-crosslinked acrylic rubber is included in the concept of “elastomer” of the present invention. Silver particles are included in the concept of the “conductive material” of the present invention. The silver particle content is 38 vol% when the volume of the electrode 30 is 100 vol%. The electrode 30 has a rectangular film shape. The pair of front and rear electrodes 30 are disposed on the upper surface of the wall portion above the airbag portion 2.

  The cover film 32 is made of silicone rubber and has a rectangular film shape. The cover film 32 covers the upper surfaces of the upper and lower walls of the pair of front and rear electrodes 30 and the airbag part 2 from above. The power feeding region R <b> 1 is set on the upper surface of the cover film 32. The positional relationship between the power receiving region R2 and the cover film 32 (that is, the power feeding unit 3) is included in the present invention in which the power feeding unit is “disposed facing the power receiving region”. When viewed from above or below, the power feeding region R1 includes a pair of front and rear electrodes 30.

  An under cover 92 of the vehicle 9 is disposed above the cover film 32. The under cover 92 has a corrugated shape. A pair of front and rear electrodes 902 are disposed on the upper surface of the under cover 92. The power receiving region R <b> 2 is set on the lower surface of the under cover 92. When viewed from above or below, the power receiving region R2 includes a pair of front and rear electrodes 902. As shown in FIG. 1, in a state where the front wheel 91 is accommodated in the positioning unit 50, the power receiving region R2 and the power feeding region R1 face each other in the vertical direction. In addition, the electrode 902 and the electrode 30 face each other in the vertical direction.

[Electric configuration of contactless power supply device]
Next, the electrical configuration of the contactless power supply device of this embodiment will be described. As shown in FIG. 4, the power receiving device 90 of the vehicle 9 includes a bridge rectifier circuit 900, a battery (secondary battery) 901, the pair of front and rear electrodes 902 described above, and the power receiving region R2 described above. .

  The bridge rectifier circuit 900 is a so-called full-wave rectifier circuit. The bridge rectifier circuit 900 includes four diodes 900a. The pair of front and rear electrodes 902 and the battery 901 are electrically connected via the bridge rectifier circuit 900. For this reason, the voltage application direction to the battery 901 is constant even when the polarity of the pair of front and rear electrodes 30 is reversed during power supply described later.

  An under cover 92 and a cover film 32 are interposed from the upper side to the lower side between the electrode 902 and the electrode 30 facing in the vertical direction. At the time of power supply to be described later, a dielectric layer is formed between the electrode 902 and the electrode 30 by the under cover 92 and the cover film 32.

[Motion when switching the contactless power supply device from the separated state to the contact state]
Next, the movement at the time of switching from the separated state to the contact state of the contactless power supply device of the present embodiment will be described. In FIG. 5, the left view in the contact state of the non-contact electric power feeder of this embodiment is shown. FIG. 5 corresponds to FIG. 2 (separated state).

  First, as shown in FIG. 1, the driver gets on the base 5 with the vehicle 9. Then, the front wheel 91 is put into the positioning unit 50. This state is the separated state shown in FIG. Next, as shown in FIGS. 2 and 5, the driver moves the second wall portion 411 upward by gripping the grip 400a and swinging the lever 400 downward.

  FIG. 6 shows an enlarged view in the frame VI of FIG. In addition, what is shown with a dashed-dotted line in FIG. 6 is the shape of the wall part above the airbag part 2, the pair of front and rear electrodes 30, and the cover film 32 in the separated state of FIG. As shown in FIG. 6, in the contact state, the upper wall portion of the airbag portion 2, the pair of front and rear electrodes 30, and the cover film 32 follow the shape of the lower surface (outer surface) of the undercover 92 to corrugate Is deformed. For this reason, the power feeding region R1 and the power receiving region R2 are in surface contact with each other. As indicated by arrows in FIG. 6, an urging force due to air compression of the airbag portion 2 and an urging force due to movement of the second wall portion 411 are applied to the interface between the power feeding region R1 and the power receiving region R2 from below. ing. For this reason, the power feeding region R1 and the power receiving region R2 are in close contact with each other.

[Movement when supplying power to a non-contact power supply device]
Next, the movement at the time of power supply of the contactless power supply device of the present embodiment will be described. As shown in FIG. 4, when the AC power supply 31 is turned on, the voltage application direction between the front electrode 30 and the electrode 902 (capacitor) and between the rear electrode 30 and the electrode 902 (capacitor) is periodic. Invert. The electric charge charged in each capacitor is supplied to the battery 901 via the bridge rectifier circuit 900. In this way, the battery 901 is charged. After charging the battery 901, the second wall 411, that is, the power feeding region R1 is moved downward by swinging the lever 400 upward.

  FIG. 7 shows an enlarged view of the vicinity of the airbag unit when the relative positional relationship between the vehicle and the non-contact power supply device of the non-contact power supply device of the present embodiment is shifted. FIG. 7 corresponds to FIG. As indicated by arrows in FIG. 7, when the second wall portion 411 is displaced forward (orthogonal direction), the front and rear walls of the airbag portion 2 are inclined so as to absorb the displacement. For this reason, the power feeding region R1 remains in close contact with the power receiving region R2. Thus, the power feeding region R1 and the power receiving region R2 are difficult to slide.

[Function and effect]
Next, the effect of the contactless power supply device 1 of the present embodiment will be described. According to the contactless power supply device 1 of the present embodiment, the electrode 30 includes an elastomer and a conductive material. The cover film 32 is made of an elastomer. The airbag portion 2 is made of an elastomer. The airbag portion 2 is filled with air. For this reason, the electric power feeding part 3 and the airbag part 2 are flexible. Therefore, as shown in FIG. 6, when the power feeding region R1 and the power receiving region R2 come into contact with each other, the power feeding unit 3 and the airbag unit 2 are deformed so that the power feeding region R1 follows the outer surface shape of the power receiving region R2. Can be deformed.

  According to the contactless power feeding device 1 of the present embodiment, the contact area of the interface between the power feeding region R1 and the power receiving region R2 can be increased. For this reason, power transmission efficiency becomes high. Further, the power feeding region R1 can be elastically contacted with the power receiving region R2 by the urging force of the flexible power feeding unit 3 and the airbag unit 2. For this reason, at the time of electric power supply, electric power feeding area | region R1 can be closely_contact | adhered to electric power receiving area | region R2. Therefore, at the time of power supply, the power supply side electrode 30 and the power reception side electrode 902 are not easily separated.

  Further, according to the contactless power supply device 1 of the present embodiment, the power supply region R1 can be freely deformed following the outer surface shape of the power receiving region R2. For this reason, the freedom degree of design of the outer surface shape of power receiving area | region R2 becomes high. Moreover, high power transmission efficiency can be ensured regardless of the vehicle type. That is, the versatility with respect to a vehicle type becomes high.

  Moreover, according to the non-contact electric power feeder 1 of this embodiment, the airbag part 2 is filled with air. Compared to liquid, gas is highly compressible. For this reason, even when the upper wall portion of the airbag portion 2 is deformed, the influence of the deformation on the lower wall portion and the horizontal wall portion of the airbag portion 2 is small. Therefore, the airbag portion 2 is not easily deformed in the horizontal direction.

  Further, according to the contactless power supply device 1 of the present embodiment, as shown in FIG. 7, after the power feeding region R1 and the power receiving region R2 once contact each other, the relative position between the vehicle 9 and the contactless power feeding device 1 is determined. Even when the relationship is shifted in the horizontal direction, the power feeding region R1 and the power receiving region R2 are not easily displaced. For this reason, it is difficult for the power feeding region R1 and the power receiving region R2 to be in sliding contact.

  Further, according to the contactless power supply device 1 of the present embodiment, the drive unit 4 is arranged. For this reason, as shown in FIG. 2 (separated state) and FIG. 5 (contact state), the power feeding region R1 can be moved with respect to the power receiving region R2. In addition, the elastic contact force of the power feeding region R1 with respect to the power receiving region R2 can be adjusted. Further, as indicated by a dotted line in FIG. 2, the height of the power feeding region R1 can be adjusted according to the height of the power receiving region R2. For this reason, regardless of the vehicle type (regardless of the height of the power receiving area R2 of the vehicle 9), the power feeding area R1 can be reliably brought into elastic contact with the power receiving area R2.

  In addition, according to the contactless power supply device 1 of the present embodiment, the power supply region R1 can be moved manually through the drive unit 4. For this reason, the non-contact electric power feeder 1 can be installed easily and easily, for example also in parking spaces, parking lots, etc. of a general household, an apartment, a store, etc. Further, since the power feeding region R1 is moved by human power, the manufacturing cost of the contactless power feeding device 1 can be reduced. Moreover, the structure of the non-contact power feeding device 1 can be simplified. Moreover, according to the link mechanism part 41, electric power feeding area | region R1 can be reciprocated to an up-down direction. For this reason, compared with the case where the horizontal direction component is included in the trajectory of the power feeding region R1 (for example, when the power feeding region R1 swings), the power feeding region R1 and the power receiving region R2 are less likely to slide. Further, according to the link mechanism 41, the second wall 411 can be kept parallel to the first wall 410 regardless of the vertical position of the second wall 411. Moreover, the non-contact electric power feeder 1 of this embodiment is provided with the positioning part 50, as shown in FIG. For this reason, it is possible to easily align the power feeding region R1 and the power receiving region R2 without using a sensor or the like.

<Second embodiment>
The difference between the contactless power supply device of the present embodiment and the contactless power supply device of the first embodiment is that a buffer member is disposed on the central second arm. Here, only differences will be described.

  In FIG. 8, the left view of the part above the drive part of the non-contact electric power feeder of this embodiment is shown. In addition, about the site | part corresponding to FIG. 2, it shows with the same code | symbol. As shown in FIG. 8, the second arm 413 at the center includes a concave member 413a and a convex member 413b. The upward convex portion of the convex member 413b is accommodated in the downward concave portion of the concave member 413a so as to be able to reciprocate. In addition, a stopper (not shown) is disposed between the convex portion and the concave portion in order to prevent the convex portion from completely falling out of the concave portion. A coil spring 413c is interposed between the concave member 413a and the convex member 413b.

  The contactless power supply device according to the present embodiment and the contactless power supply device according to the first embodiment have the same functions and effects with respect to parts having the same configuration. Further, according to the contactless power feeding device of the present embodiment, when switching from the separated state shown in FIG. 2 to the contact state shown in FIG. 5, the impact applied to the power feeding region R1 and the power receiving region R2 is applied to the coil. It can be relaxed by the spring 413c. In addition, the power supply region R1 can be in close contact with the power receiving region R2 when power is supplied.

<Third embodiment>
The difference between the contactless power supply device of the present embodiment and the contactless power supply device of the first embodiment is that an electrode and a cover film are arranged on the lower surface of the wall portion above the airbag portion. . Here, only differences will be described.

  In FIG. 9, the left view (sectional drawing) of the airbag part of the non-contact electric power feeder of this embodiment is shown. In addition, about the site | part corresponding to FIG. 6, it shows with the same code | symbol. As shown in FIG. 9, a pair of front and rear electrodes 30 and a cover film 32 are disposed on the lower surface of the wall portion above the airbag portion 2. The cover film 32 covers the pair of front and rear electrodes 30 from below. On the upper surface of the wall portion above the airbag portion 2, a power feeding region R1 is set.

  A wall portion above the airbag portion 2 is interposed between the power receiving region R2 and the power feeding portion 3. The positional relationship between the power receiving region R2 and the power feeding unit 3 is included in a form in which the power feeding unit is “disposed facing the power receiving region” in the present invention.

  During power supply, a dielectric layer is formed between the electrode 902 (see FIG. 6) and the electrode 30 by the under cover 92 (see FIG. 6) and the wall portion above the airbag portion 2.

  The contactless power supply device according to the present embodiment and the contactless power supply device according to the first embodiment have the same functions and effects with respect to parts having the same configuration. Further, according to the contactless power supply device of the present embodiment, the pair of front and rear electrodes 30 and the cover film 32 are accommodated inside the airbag portion 2. For this reason, the pair of front and rear electrodes 30 can be protected from the external environment.

<Fourth embodiment>
The difference between the contactless power supply device of this embodiment and the contactless power supply device of the first embodiment is that a cushioning portion made of urethane foam is arranged instead of the airbag portion. Here, only differences will be described.

  In FIG. 10, the left view (sectional drawing) of the buffer part of the non-contact electric power feeder of this embodiment is shown. In addition, about the site | part corresponding to FIG. 6, it shows with the same code | symbol. As shown in FIG. 10, the buffer part 20 is made of urethane foam. A pair of front and rear electrodes 30 and a cover film 32 are disposed on the upper surface of the buffer portion 20. On the upper surface of the cover film 32, a power feeding region R1 is set.

  The contactless power supply device according to the present embodiment and the contactless power supply device according to the first embodiment have the same functions and effects with respect to parts having the same configuration. Further, according to the contactless power supply device of the present embodiment, the structure of the buffer portion 20 is simplified.

<Fifth embodiment>
The difference between the contactless power supply device of the present embodiment and the contactless power supply device of the first embodiment is that a coil is disposed instead of an electrode. Here, only differences will be described. In FIG. 11, the perspective view of the part above the drive part of the non-contact electric power feeder of this embodiment is shown. In addition, about the site | part corresponding to FIG. 3, it shows with the same code | symbol. As shown in FIG. 11, the coil 33 includes amine-crosslinked acrylic rubber and silver particles. The silver particle content is 38 vol% when the volume of the electrode 30 is 100 vol%. The coil 33 has a spiral shape and a thin film shape. The coil 33 is disposed on the upper surface of the airbag unit 2. The cover film 32 covers the coil 33 from above. On the upper surface of the cover film 32, a power feeding region R1 is set. As shown by a thin line in FIG. 11, a coil 903 is disposed in the power receiving region R2 of the vehicle. The coil 33 and the coil 903 are opposed to each other in the vertical direction.

  The contactless power supply device according to the present embodiment and the contactless power supply device according to the first embodiment have the same functions and effects with respect to parts having the same configuration. Further, according to the contactless power supply device of the present embodiment, power can be supplied to the battery by using electromagnetic induction between the power supply side coil 33 and the power reception side coil 903.

<Others>
The embodiment of the contactless power supply device of the present invention has been described above. However, the embodiment is not particularly limited to the above embodiment. Various modifications and improvements that can be made by those skilled in the art are also possible.

  The kind of gas with which the airbag part 2 is filled is not particularly limited. Nitrogen, a noble gas, etc. may be sufficient. Moreover, piping (a pipe, a tube, a hose, etc.) may be connected to the airbag part 2 so that gas can enter and exit. If it carries out like this, the internal pressure of the airbag part 2 can be adjusted. Further, a pressure gauge may be set in the airbag portion 2. In this way, the separated state shown in FIG. 2 and the contact state shown in FIG. 5 can be detected by pressure change. Further, a liquid (water, oil, etc.) may be put into the airbag part 2. In addition, the airbag part 2 itself expands and contracts in the vertical direction (for example, a bellows shape is given to the horizontal wall part of the airbag part 2. In addition, a pipe is connected to the airbag part 2 to allow gas to enter and exit. Thus, the separated state shown in FIG. 2 and the contact state shown in FIG. 5 may be switched. In this way, the drive unit 4 becomes unnecessary. Moreover, the structure of the drive part 4 is not specifically limited. A cam mechanism, a fluid cylinder, a robot, or the like may be used.

  Moreover, the lower surface shape and inclination of the under cover 92 of the vehicle 9 are not particularly limited. There may be irregularities such as fins and holes. Moreover, a plane, a curved surface, etc. may be sufficient. Further, the position of the power receiving region R2 in the vehicle 9 is not particularly limited. It may be a front bumper lower surface, a rear bumper lower surface, a body side surface, a body upper surface, or the like.

  Moreover, the arrangement | positioning method of the electrode 30 and the coil 33 with respect to the airbag part 2 is not specifically limited. The electrode 30 and the coil 33 produced separately from the airbag unit 2 may be attached to the airbag unit 2. Further, the electrode 30 and the coil 33 may be sandwiched between the airbag portion 2 and the cover film 32 and laminated.

  Alternatively, the electrode 30 and the coil 33 may be formed by printing paint (for example, screen printing, inkjet printing, flexographic printing, gravure printing, pad printing, lithography, etc.) on the airbag unit 2. Alternatively, the electrode 30 and the coil 33 may be formed by applying a paint to the airbag portion 2 (for example, a dipping method, a spray method, a bar coating method, or the like).

  Further, the number, arrangement area, and shape of the electrodes 30 and the coils 33 are not particularly limited. Further, the arrangement number, arrangement area, and shape of the electrodes 30 may not match the arrangement number, arrangement area, and shape of the electrodes 902. Similarly, the arrangement number, arrangement area, and shape of the coil 33 may not match the arrangement number, arrangement area, and shape of the coil 903. For example, when the arrangement number of the electrodes 30 is larger than the arrangement number of the electrodes 902 (when the arrangement area of the electrodes 30 is made larger than the arrangement area of the electrodes 902), the electrodes 30 and the electrodes 902 are opposed in the vertical direction in a wide range. Can be made. For this reason, precise alignment between the contactless power supply device 1 and the vehicle 9 is not necessary.

  The shape and area of the power feeding region R1 and the power receiving region R2 are not particularly limited. It is sufficient that at least the electrode 30 and the coil 33 are disposed in the power supply region R1 when viewed from above or below. It is sufficient that at least the electrode 902 and the coil 903 are disposed in the power receiving region R2 when viewed from above or below.

  The material of the airbag part 2 and the cover film 32 is not specifically limited. Resins and elastomers may be used alone or in combination. The elastomer may contain additives such as a plasticizer, a processing aid, a crosslinking agent, a crosslinking accelerator, a crosslinking aid, an antiaging agent, a softening agent, and a coloring agent.

  As an elastomer suitable for the airbag portion 2 and the cover film 32, acrylic rubber, ethylene-propylene copolymer rubber, natural rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer are used from the viewpoint of elasticity at room temperature. Polymerized rubber, epichlorohydrin rubber, chlorosulfonated polyethylene, chlorinated polyethylene, urethane rubber, fluorine rubber, chloroprene rubber, cross-linked rubber such as isobutylene isoprene rubber, and styrene, olefin, vinyl chloride, polyester, polyurethane, Examples thereof include thermoplastic elastomers such as polyamide.

  Suitable resins for the airbag portion 2 and the cover film 32 include polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), modified polyester resins (urethane modified polyester resins, epoxy modified polyester resins, acrylic modified polyester resins). Etc.), polyether urethane resin, polycarbonate urethane resin, vinyl chloride-vinyl acetate copolymer, phenol resin, acrylic resin, polyamideimide resin, polyamide resin, nitrocellulose, modified celluloses (cellulose, acetate, butyrate (CAB), Cellulose acetate, propionate (CAP), etc.).

  Moreover, the material of the buffer part 20 is not specifically limited. Any resin foam or elastomer foam may be used. For example, polyurethane foam, polystyrene foam, polyolefin foam, phenol foam, silicone foam, polyimide foam, hydrosilyl crosslinked ethylene-propylene-diene terpolymer (EPDM) foam , Polyester foam, polyimide foam and the like.

  Further, when metal particles are used as the conductive material of the electrode 30 and the coil 33, the elastomer does not include any of sulfur, sulfur compounds, and organic peroxides from the viewpoint of suppressing oxidation and sulfurization of the metal particles. It is preferable. In this case, as the elastomer, it is preferable to use one or more selected from sulfur, a sulfur compound, a crosslinked rubber crosslinked without using an organic peroxide, and a thermoplastic elastomer.

  The former crosslinked rubber may be any rubber that is crosslinked without using a sulfur-containing vulcanizing agent, vulcanization accelerator, or peroxide-based crosslinking agent. Examples of such a crosslinked rubber include EPDM, amine-crosslinked acrylic rubber, isocyanate-crosslinked urethane rubber, and isocyanate-crosslinked liquid butadiene rubber. Examples of the latter thermoplastic elastomer include polyester-based thermoplastic elastomer (TPEE), polyurethane-based thermoplastic elastomer (TPU), polyolefin-based thermoplastic elastomer (TPO), polyamide-based thermoplastic elastomer, styrene-based block copolymer-based thermoplastic elastomer ( SIS, SBS, etc.).

  The elastomer of the electrode 30 and the coil 33 is not particularly limited. What is necessary is just to select suitably from the said elastomer enumerated as an elastomer suitable for the airbag part 2 and the cover film 32. FIG. Moreover, the kind of electrically conductive material is not specifically limited. One or more metal powders such as gold, copper, nickel, rhodium, palladium, chromium, titanium, platinum, iron, and alloys thereof can be used. Carbon materials such as carbon black, carbon nanotubes, and graphite may be used. Moreover, you may use the covering particle | grains which coat | covered the surface of particle | grains other than a metal with the metal. In this case, the specific gravity of the conductive material can be reduced as compared with the case where the conductive material is made of only metal. Therefore, when it is made into a paint, sedimentation of the conductive material is suppressed and dispersibility is improved. Also, by processing the particles, various shapes of conductive materials can be easily manufactured. In addition, the cost of the conductive material can be reduced. As the metal to be coated, metal materials such as silver listed above may be used. Further, as particles other than metal, carbon materials such as carbon black, metal oxides such as calcium carbonate, titanium dioxide, aluminum oxide, and barium titanate, inorganic substances such as silica, resins such as acrylic and urethane, and the like may be used. .

  What is necessary is just to determine suitably content of a electrically conductive material so that electroconductivity and a softness | flexibility can be made compatible. For example, from the viewpoint of ensuring conductivity, the content of the conductive material is preferably 10 vol% or more when the volume of the electrode 30 and the coil 33 is 100 vol%. It is more preferable that it is 15 vol% or more. On the other hand, when the content of the conductive material increases, the flexibility decreases. For this reason, it is preferable that content of an electrically conductive material is 40 vol% or less when the volume of the electrode 30 and the coil 33 is 100 vol%. It is more preferable that it is 25 vol% or less.

1: contactless power supply device, 2: air bag unit, 3: power supply unit, 4: drive unit, 5: base, 9: vehicle.
20: buffer part, 30: electrode, 31: AC power supply, 32: cover film, 33: coil, 40: input part, 41: link mechanism part, 50: positioning part, 90: power receiving device, 91: front wheel, 92: undercover.
400: lever, 400a: grip, 401: shaft, 410: first wall, 410a: support, 411: second wall, 411a: support, 412: first arm, 413: second arm, 413a: Recess material, 413b: convex member, 900: bridge rectifier circuit, 900a: diode, 901: battery, 902: electrode, 903: coil.
R1: Power feeding area, R2: Power receiving area.

Claims (6)

A non-contact power feeding device including a power feeding region that supplies power by contacting a power receiving region of a vehicle,
A buffer,
A power feeding unit that is disposed in the buffer unit and is opposed to the power receiving region, and having a conductive unit including an elastomer and a conductive material;
With
The contactless power feeding device according to claim 1, wherein the power feeding region is deformed following the shape of the power receiving region when the buffer portion and the power feeding portion are deformed.   The contactless power supply device according to claim 1, wherein the buffer portion is a gas-filled airbag portion.   The contactless power supply device according to claim 1, wherein the conductive portion is a coil or an electrode.   The non-contact power feeding device according to claim 1, further comprising a drive unit that can connect and disconnect the power feeding region with respect to the power receiving region. A direction in which the power receiving region and the power feeding region overlap is defined as an overlapping direction, and a direction orthogonal to the overlapping direction is defined as an orthogonal direction.
The non-contact power feeding device according to claim 4, wherein the driving unit includes an input unit to which human power is input and a link mechanism unit that is connected to the input unit and reciprocates the power feeding region in the overlapping direction.   The non-contact power feeding device according to any one of claims 1 to 5, further comprising a positioning unit that determines a position of the vehicle so that the power feeding region and the power receiving region are in contact with each other when power is supplied.

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