JP5574107B2 - Vehicle charging device - Google Patents

Description

  The present invention relates to a vehicle charging device.

  In recent years, many electric vehicles such as electric vehicles and plug-in hybrid vehicles have been put into practical use. A driving battery mounted on such an electric vehicle is generally charged by electric power supplied from an external commercial power supply via a charging cable connected to a charging port of the vehicle body. Further, the charging cable is often attached and detached at that time by a user (driver) of the electric vehicle.

  This attachment / detachment work of the charging cable is troublesome for the user. Some charging cables are relatively heavy and difficult to handle, for example, quick charging cables. For example, when the charging facility is installed outdoors such as a parking lot of a commercial facility, the charging cable is often contaminated with dust or the like. As described above, since the attaching / detaching operation of the charging cable may be a burden on the user, it has been conventionally desired to facilitate the charging operation.

  In addition, for example, if the user forgets to connect the charging cable to the vehicle, charging may be insufficient, and the vehicle may not be moved.

  In order to solve such a problem, development of a charging device for a vehicle that can charge a battery in a non-contact manner is underway. For example, in a state where a power receiving side coil mounted on an electric vehicle is opposed to a power feeding side coil installed in a parking lot or the like, an AC current is supplied to the power feeding side coil and an AC current is supplied to the power receiving side coil by electromagnetic induction. In some cases, the battery is charged by generating (see, for example, Patent Document 1). By adopting such a charging device, the charging operation can be greatly facilitated.

  In Patent Document 1, in order to improve the power transmission efficiency by electromagnetic induction between the power receiving side coil and the power feeding side coil, the power feeding coil incorporated in the wheel stopper is urged by the electric vehicle contacting the wheel stopper. When the posture is changed in the horizontal plane and the electric vehicle is stopped in this state, the feeding coil is configured to take a fixed posture with respect to the electric vehicle.

JP-A-7-227007 (FIG. 1 etc.)

  However, there are cases where it is difficult to stop the electric vehicle at a predetermined position. In such a case, the central axes of the power receiving side coil and the power feeding side coil are shifted, and the charging efficiency of the battery may be reduced. There is a problem that there is.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicular charging device that can efficiently charge without contact without strictly stopping the vehicle.

The vehicle charging device of the present invention includes a power receiving unit including a secondary coil connected to the rechargeable battery of a vehicle including a rechargeable battery, a primary coil, and is installed on the ground side, and the power receiving unit of the vehicle The power feeding unit having a recess that fits with the protrusion provided on the power receiving unit by moving toward the power receiving unit, and the protrusion of the power receiving unit and the recess of the power feeding unit. A positioning means for positioning the power feeding portion relative to the power receiving portion when combining, and a power feeding portion power supply means provided in the power feeding portion for supplying power to the primary coil. Means are slope portions provided on the projecting portion of the power receiving unit and the recessed portion of the power feeding unit and configured to fit each other, and the projecting portion of the power receiving unit and the recessed portion of the power feeding unit Discharge to discharge foreign matter present on the mating surface when mating Further comprising a step, said discharge means is a through hole passing through the feed portion facing said mating surface, the through hole is a lower slope of the slope portion deepest recess of the feeding portion It is provided in the position.

The vehicle charging device according to the present invention includes positioning means, so that positioning can be easily performed, and the vehicle does not have to be strictly stopped. Since this positioning means is a slope part, it can be simply configured and positioning can be performed with high accuracy. Further, by providing the discharging means, it is possible to discharge the foreign matter present on the fitting surface at the time of fitting, and alignment can be performed with higher accuracy. Furthermore, since the through hole is provided at the lowermost part of the slope part, foreign substances on the slope part can be easily removed.

  As a preferred embodiment of the present invention, a power receiving unit power supply means that is connected to the power receiving unit and supplies power to the secondary coil, and a surface of the power feeding unit that faces the power receiving unit are provided on the opposite side. And a power feeding part moving means having an electromagnet, wherein the secondary coil and the primary coil are wound around a core core made of a ferromagnetic material, and power is supplied to the primary coil by the power feeding part power supply means. Then, a magnetic field is formed, and electric power is supplied to the secondary coil by the power receiving unit power supply means to form a magnetic field attracting the primary coil, and power is supplied to the electromagnet of the power feeding unit moving means. For example, a magnetic field that repels the primary coil is formed, the power feeding unit is moved to the power receiving unit by the magnetic field, and the power feeding unit and the power receiving unit are fitted.

  According to the charging device for a vehicle of the present invention, there is an excellent effect that charging can be efficiently performed without contact without strictly stopping the vehicle.

It is a schematic block diagram which shows the charge control apparatus which concerns on embodiment. It is a cross-sectional schematic diagram which shows schematic structure of the electric power supply means of the charge control apparatus which concerns on embodiment. It is a figure which shows the state at the time of charge operation of the electric power supply means of the charge control apparatus which concerns on embodiment. It is a figure which shows the state at the time of charge operation of the electric power supply means of the charge control apparatus which concerns on embodiment. It is a figure which shows the state at the time of charge operation of the electric power supply means of the charge control apparatus which concerns on embodiment. It is a figure which shows the state after the charge action | operation of the electric power supply means of the charge control apparatus which concerns on embodiment. It is a figure which shows the state at the time of charge operation of the electric power supply means of the charge control apparatus which concerns on another embodiment. It is a cross-sectional schematic diagram which shows schematic structure of the electric power supply means of the charging control apparatus which concerns on another embodiment. It is a figure which shows the state at the time of charge operation of the electric power supply means of the charge control apparatus which concerns on another embodiment. It is a figure which shows the state at the time of charge operation of the electric power supply means of the charge control apparatus which concerns on another embodiment.

  The vehicle charging device of the present invention will be described below.

  An electric vehicle 1 that is an electric vehicle includes a battery 11 as a driving power source. The battery 11 is formed by directly connecting a plurality of battery cells such as lithium ion batteries. The battery 11 is a rechargeable battery, stores electric power when supplied with electric power from the outside, and outputs the electric power to a motor (not shown) to drive the electric vehicle 1.

  The power supply means I for supplying power to the battery 11 will be described in detail below. The power supply means I of this embodiment is for supplying a charging current to the battery 11 in a non-contact manner by electromagnetic induction. The power supply means I includes a power feeding unit 21 provided on the ground side and a power receiving unit 12 provided on the electric vehicle side. The power receiving unit 12 has a secondary coil 13 that functions as a power receiving coil, and the power feeding unit 21 has a primary coil 23 that functions as a power feeding coil.

  The power receiving unit 12 is installed at the lower part of the electric vehicle 1. The power receiving unit 12 is connected to the battery 11 and supplies the power supplied from the power feeding unit 21 to the battery 11.

  As shown in FIG. 2, in this embodiment, the power receiving unit 12 is more than the flat plate portion 14 having the secondary coil 13 and the flat plate portion 14 provided on the bottom surface (surface facing the ground) of the flat plate portion 14. A second flat plate portion 16 having a small cylindrical shape is provided. The power receiving unit 12 includes a concave portion 15 provided on an end surface of the second flat plate portion 16 facing the ground. The recess 15 has a mortar shape that is inclined from the end toward the center as viewed from the ground side. The recess 15 is exposed to the outside on the lower surface side of the vehicle body of the electric vehicle 1.

  At the center of the secondary coil 13, an iron core (not shown) that is a ferromagnetic material is provided. That is, the secondary coil 13 functions as an electromagnet when current is supplied, and is a power receiving coil that generates an induced current when no current is supplied and when a current is supplied to the primary coil 23 to form a magnetic field. Function as.

  A power receiving unit power supply means 30 for supplying power to the secondary coil 13 is provided in the power receiving unit 12. As will be described in detail later, when power is supplied to the secondary coil 13 by the power receiving unit power supply means 30, a magnetic field is formed in the vicinity of the secondary coil 13 and functions as an electromagnet.

  The power feeding unit 21 is installed in an installation recess 22 provided on the ground at the vehicle stop position. The power feeding unit 21 includes a flat plate portion 24 having a primary coil 23. On the upper surface (surface facing the vehicle) of the flat plate portion 24, there is a convex portion 25 composed of a conical portion 25 a having a mountain shape in a cross-sectional view and a peripheral wall portion 25 b provided around the flat plate portion 24. The convex portion 25 and the above-described concave portion 15 of the power receiving unit 12 have a shape that fits together. That is, the conical portion 25 a is fitted into the concave portion 15 of the power receiving portion, and the peripheral wall portion 25 b is fitted into the cylindrical surface of the second flat plate portion 16 of the flat plate portion 14. At the center of the primary coil 23, an iron core that is a ferromagnetic material is provided.

  A power supply unit 40 for supplying power to the primary coil 23 of the power supply unit 21 is provided in the power supply unit 21. The power feeding unit 21 functions as an electromagnet when supplied with power, and forms an induced current in the power receiving unit 12 by a magnetic field formed by supplying power.

  On the lower surface side of the power feeding unit 21, a power feeding unit moving unit 50 for moving the power feeding unit 21 in the vertical direction is provided. The power feeding unit moving means 50 has a flat plate shape and is configured so that the power feeding unit 21 can be placed on the upper surface. The power feeding unit moving means 50 is provided with an electromagnet 51.

  The power feeding unit moving unit 50 includes a moving unit power supplying unit 60 that supplies power to the electromagnet 51 of the power feeding unit moving unit 50.

  The power supply by the power supply means I will be described below.

  First, as shown in FIG. 3, power is supplied from the moving unit power supply unit 60 to the electromagnet 51, and power is supplied from the power receiving unit power supply unit 30 to the secondary coil 13. Power is supplied from 40 to the primary coil 23. In this case, the moving part power supply means 60 supplies power to the electromagnet 51 so that a magnetic field is formed from the ground side to the vehicle side by the electromagnet 51. Further, the power receiving unit power supply unit 30 changes the power to the secondary coil 13 so that a magnetic field formed by supplying power from the power receiving unit power supply unit 30 to the secondary coil 13 is formed from the vehicle side to the ground side. Supply power. Further, the power supply unit power supply unit 40 supplies the primary coil 23 with a magnetic field formed by supplying power from the power supply unit power supply unit 40 to the primary coil 23 from the vehicle side to the ground side. Supply power.

  By supplying electric power in this way, the power feeding part 21 side of the electromagnet 51 becomes the S pole, and the electromagnet 51 side of the power feeding part 21 becomes the S pole. In addition, the power receiving unit 12 side of the power feeding unit 21 is an N pole, and the power feeding unit 21 side of the power receiving unit 12 is an S pole. That is, since the opposing surfaces of the electromagnet 51 and the primary coil 23 have the same polarity, the electromagnet 51 and the primary coil 23 are repelled, and the power feeding unit 21 having the primary coil 23 is levitated. When the power feeding unit 21 is levitated, the opposing surfaces of the primary coil 23 and the secondary coil 13 have different polarities, so that the attractive force acts on each other.

  In this way, when the power feeding unit 21 floats and the primary coil 23 and the secondary coil 13 attract each other, the power feeding unit 21 that floats as shown in FIG. 4 is in close contact with the power receiving unit 12. At this time, the convex portion 25 of the power feeding unit 21 and the concave portion 15 of the power receiving unit 12 are fitted to each other. That is, the conical portion 25a is fitted into the concave portion 15, and the flat plate portion 14 and the peripheral wall portion 25b on the outer peripheral side of the concave portion 15 are fitted. Therefore, even if the center of the power feeding unit 21 and the center of the power receiving unit 12 are misaligned, the center of the power feeding unit 21 and the center of the power receiving unit 12 are located at the same position by fitting the convex portion 25 into the concave portion 15. The power feeding unit 21 and the power receiving unit 12 are in close contact with each other. As described above, the center of the power feeding unit 21 and the center of the power receiving unit 12 are at the same position, so that power feeding efficiency is good when power feeding is performed in a subsequent process.

  By the way, for example, if there is dust, particularly metal dust (for example, a pull tab of a can) on the surface of the power supply unit 21, the following problem may occur. That is, when the power feeding unit 21 and the power receiving unit 12 are in close contact with the dust in between, there is a problem that the adhesion between the power feeding unit 21 and the power receiving unit 12 is lowered. In addition, when the power feeding unit 21 and the power receiving unit 12 are in close contact with each other particularly with metal dust in between, there may be a problem that heat is generated from the metal dust portion.

  Therefore, in this embodiment, in order to prevent this, the through hole 26 is provided between the conical portion 25a and the peripheral wall portion 25b of the convex portion 25 so as to face the fitting surface. Since the through hole 26 is provided between the conical portion 25a and the peripheral wall portion 25b, that is, below the inclined surface of the inclined surface portion, even if dust accumulates on the conical portion 25a, the inclined surface slides, fall into. In particular, in the present embodiment, since the power feeding unit 21 is levitated by the power feeding unit moving means 50, dust easily slides on the slope due to the shaking during the ascent and the like, and easily falls into the through hole 26. Therefore, in this embodiment, it is possible to easily remove dust on the power feeding unit 21.

  As shown in FIG. 1, a holding member 70 is provided at the bottom of the electric vehicle 1. The holding member 70 is moved to a predetermined position by an actuator (not shown), and holds the power feeding unit 21 and the power receiving unit 12 that are aligned and in close contact with each other.

  Specifically, as shown in FIG. 5, the holding member 70 includes a pair of holding parts including a first holding part 71 and a second holding part 72 that hold the power feeding part 21 and the power receiving part 12 from above and below. Consists of parts. The first sandwiching portion 71 is U-shaped in a cross-sectional view, and the power feeding portion 21 and the power receiving portion 12 that are in close contact with the holding portion concave portion 73 are inserted, and the power feeding portion 21 and the power receiving portion 12 that are in close contact with each other. Between the top and bottom. And the 2nd clamping part 72 comprised similarly to the 1st clamping part 71 clamps the electric power feeding part 21 and the power receiving part 12 of the state which closely_contact | adhered in the position facing this 1st clamping part 71 similarly. Even if the power supply to the power feeding unit 21 and the power receiving unit 12 is stopped by sandwiching and holding the power feeding unit 21 and the power receiving unit 12 in close contact with each other by the holding member 70 in this manner, Can be held.

  In a state where the power feeding unit 21 and the power receiving unit 12 are closely held by the holding member 70, the moving unit power supply unit 60, the power feeding unit power supply unit 40, and the power receiving unit power supply unit 30 respectively stop power supply. Thereby, the magnetic field disappears in each of the power feeding unit moving unit 50, the power feeding unit 21, and the power receiving unit 12.

  Thereafter, power is supplied from the power supply unit power supply means 40 to the power supply unit 21, and a current flows through the primary coil 13. Along with this, an induced current flows to the power receiving unit 12 side by electromagnetic induction. This induced current is rectified by a rectifier (not shown) and supplied as a direct current to the battery 11 (see FIG. 1). Thereby, the battery 11 is charged.

  When the battery 11 is fully charged, a charge stop signal is transmitted to a power supply unit power supply unit 40, for example, wirelessly from a battery control unit (not shown) that controls the battery 11, and the power supply unit power supply unit 40 supplies power. Stop. In this way, charging ends.

  After the charging is completed, the holding member 70 is released in order to move the power feeding unit 21 onto the power feeding unit moving means 50. In order to release the holding member 70, first, power supply to the power feeding unit power supply unit 40 and the power reception unit power supply unit 30 is started. As shown in FIG. 6, the power reception unit power supply means 30 supplies power to the secondary coil 13 so that a magnetic field generated when power is supplied to the secondary coil 13 is formed from the ground side to the vehicle side. The power feeding unit power supply means 40 supplies power to the primary coil 23 so that a magnetic field generated when power is supplied to the primary coil 23 is formed from the vehicle side to the ground side. Moreover, the moving part power supply means 60 supplies power to the electromagnet 51 so that a magnetic field is generated from the ground side to the vehicle side. That is, the power supply unit power supply unit 40 and the power reception unit power supply unit 30 supply power to the primary coil 23 and the secondary coil 13 so as to repel each other. Moreover, the moving part power supply means 60 of the power feeding part moving means 50 supplies power so that a magnetic field repelling the power feeding part 21 is generated and repels each other.

  From this state, when the holding member 70 is electrically controlled to remove the actuator (not shown) from the power feeding unit 21 and the power receiving unit 12, the power feeding unit 21 repels the power receiving unit 12 and also repels the power feeding unit moving means 50. Continue to float in the air. In this case, the moving part power supply means 60 gradually reduces the power supply amount. Thereby, the magnetic field formed by the electromagnet 51 is gradually reduced, the repulsive force between the power feeding unit moving unit 50 and the power feeding unit 21 is gradually reduced, and the power feeding unit 21 is stably placed on the power feeding unit moving unit 50. Placed. In this way, the release of the holding member 70 is completed.

  Further, in this case, the conical portion 25a and the peripheral wall portion 25b are made of a fluororesin coating agent so that when the power feeding portion 21 is repelled after being in close contact with the power receiving portion 12, it easily moves in the opposite direction to the power receiving portion 12. It may be covered with a coating material having a low friction coefficient. Moreover, you may provide the watering means which has the tank which stored water so that the electric power feeding part 21 can sprinkle to the cone part 25a so that it may move easily in suspension.

  As described above, the electric vehicle 1 in the present embodiment is charged in a non-contact manner by the power supply means I by stopping at the stop location. In this case, since the power feeding unit 21 can float and come into close contact with the power receiving unit 12, in this embodiment, it is possible to easily align the position by providing the concave portion 15 and the convex portion 25, and the power feeding unit 21 floats. Thus, the power receiving unit 12 can be in close contact with the central axis aligned, and charging can be performed with high power transmission efficiency. That is, in the present embodiment, even if the electric vehicle 1 is not strictly stopped at the stop position, it is possible to easily align the position by providing the concave portion 15 and the convex portion 25 that are slope portions, and charging with high power transmission efficiency. Is possible. Further, the power feeding unit 21 is provided with an inclined surface so that dust can be removed even if it accumulates on the surface of the power feeding unit 21, and dust can be removed from the through hole 26 to the outside of the power feeding unit 21. Therefore, the adhesion between the power feeding unit 21 and the power receiving unit 12 can be improved, positioning can be performed easily and accurately, and heat generation when, for example, metal dust is accumulated can be prevented. Can do.

  In the present embodiment, after the start of charging the electric vehicle 1, the battery 11 is continuously charged until the battery 11 is fully charged. However, the present invention is not limited to this. For example, the power supply unit power supply unit 40 may have a map, and charging may be performed based on the map. As a map, for example, using a map consisting of the remaining capacity of the battery 11 and the nighttime power usage time period, a nighttime power usage time period is selected according to the remaining capacity, a timer is set, and charging is performed at a preferred time period. You may comprise so that it may perform. For example, when the remaining capacity is large, charging may be performed by selecting only a time zone with a low electricity bill.

  In the present embodiment, the holding member 70 has a shape that sandwiches the power feeding unit 21 and the power receiving unit 12 from the side surfaces, but is not limited thereto. For example, a flat holding member may be used, and the power feeding unit 21 and the power receiving unit 12 that are in close contact with each other may be placed on the flat holding member.

  Although the primary coil 23 and the secondary coil 13 are configured to repel when the holding member 70 is released after the charging is stopped, the present invention is not limited to this. For example, power may be supplied so that the power feeding unit 21 and the power receiving unit 12 are in close contact with each other until the holding member 70 is removed. And in the state which removed the holding member 70, you may comprise so that the electric power feeding part 21 and the power receiving part 12 may repel by making the direction of the electric current flow of the power receiving part 12 into reverse direction. Further, when the holding member 70 is released, the power supply unit power supply unit 40 and the power reception unit power supply unit 30 may be configured to fall by gravity without supplying power.

  The shape of the convex part 25 and the recessed part 15 is not limited to this embodiment. Any shape may be used as long as it is easy for the power feeding unit 21 and the power receiving unit 12 to be aligned by fitting the convex part 25 and the concave part 15 together. For example, a shape as shown in FIG. In FIG. 7, the convex portion 81 is provided in the power receiving unit 12, and the concave portion 82 is provided in the power feeding unit 21. The convex portion 81 has a trapezoidal shape in a sectional view. Moreover, the recessed part 82 is provided so that it may fit in this convex part 81, and the hole used as a reverse trapezoid shape in sectional view is formed. A through hole 83 is provided on the bottom surface of the recess 82. Dust can be removed from the through hole 83.

  Even if it is such a shape, the position alignment of the electric power feeding part 21 and the power receiving part 12 can be performed easily because the convex part 81 and the recessed part 82 fit. Moreover, since dust can be efficiently removed from the through-hole 83, the adhesion between the power feeding unit 21 and the power receiving unit 12 is good, and heat generation due to metal dust can be prevented.

  Moreover, as shown in FIG. 8, you may provide a fitting part in the electric power feeding part 21 and the electric power feeding part moving means 50. As shown in FIG. That is, the moving means convex portion 91 is provided on the side opposite to the side where the convex portion 25 (see FIG. 2) of the power receiving portion 12 is provided, and the power receiving portion moving means 50 is provided on the power receiving portion 12 side. A recess 92 is provided. Thus, when the power feeding unit 21 floats after the holding member 70 is released and is placed on the power feeding unit moving unit 50, the moving unit convex portion 91 and the power receiving unit concave portion 92 are fitted to each other to ensure that the predetermined position is reached. It can comprise so that it may be mounted in. In particular, as described above, when the power feeding unit 21 is lowered by gravity without using the repulsive force of the magnetic field, the power feeding unit 21 may not be placed at a predetermined placement position. Since it is conceivable that a preferable magnetic field is not formed when the power feeding unit 21 is floated during charging, the power feeding unit 21 is fitted to the power feeding unit moving means 50 and placed at a predetermined position by configuring as shown in FIG. This is preferable.

  In this embodiment, although the electric power feeding part movement means 50 was comprised so that a coil might be included, it is not limited to this. For example, as shown in FIG. 9, the power feeding unit moving unit 50A includes a mounting table 93 on which the power feeding unit 21 is mounted, an expansion / contraction unit 94 that moves the mounting table in the vertical direction, and an electric motor that drives the expansion / contraction unit 94 to expand and contract. 95 may be provided. Moreover, this raising / lowering means may be provided with the manual actuator, for example.

  In the power feeding unit moving unit 50A configured as described above, the power feeding unit 21 mounted on the mounting table 93 can be joined to the power receiving unit 12 by driving the telescopic unit 94 by the electric motor 95 to be expanded and contracted. It is. Even in such a case, the power feeding unit 21 can be accurately fitted to the power receiving unit 12 by providing the fitting unit.

  Further, in the power feeding unit moving means 50A configured in this way, the power supply unit 21 is lifted up to the vicinity of the power receiving unit 12 by driving the telescopic unit 94 by the electric motor 95 to be expanded and contracted, and then Power may be supplied to the power feeding unit power supply unit 40 and the power receiving unit power supply unit 30, and these may be coupled by the attractive force of the magnetic field. Even in such a case, by providing the fitting portion, the power feeding portion 21 can be accurately fitted and brought into close contact with the power receiving portion 12. Then, the power feeding unit 21 and the power receiving unit 12 are simultaneously held by the holding member 70. In this case, when the power feeding unit 21 mounted on the mounting table 93 is joined to the power receiving unit 12 so as not to prevent the holding member 70 from being held, the mounting table 93 is made smaller than the outer diameter of the power feeding unit 21. The holding member 70 and the mounting table 93 are configured so as not to collide with each other.

  Further, a contact sensor may be provided in the power feeding unit 21 to detect contact with the power receiving unit 12 as to whether or not the power feeding unit 21 and the power receiving unit 12 are closely attached.

  Moreover, in this embodiment, while supplying electric power to the primary coil 23 of the electric power feeding part 21, the primary coil 23 can be used as an electromagnet, ie, while using the primary coil 23 as an electric power feeding coil, Although used as a moving coil, it is not limited to this. For example, the power feeding unit 21 may include another coil in addition to the primary coil 23, and this coil may be used as a moving coil.

  The installation recess 22 provided with the power feeding unit moving means 50 and the power feeding unit 21 may be configured to provide a shutter or the like that opens when the vehicle stops.

  A guide groove or the like up to the through hole may be provided on the inclined surface of the power feeding unit 21 so that dust can be more easily removed.

  The power feeding unit 21 may be provided with vibration means (for example, a motor or the like) so as to vibrate by the vibration means when ascending. This makes it easier for dust to reach the through hole 26 and be removed.

  Moreover, in this embodiment, although the electric power feeding part 21 was levitated by the electromagnet, it is not limited to this, For example, a cooling means is provided in the installation recessed part 22, a superconductor is installed, and the primary coil used as the electromagnet is changed. You may comprise so that the electric power feeding part 21 which it has may be levitated.

  Further, as shown in FIG. 10, a cylindrical guide member 96 that guides the power feeding unit 21 when the power feeding unit 21 is moved may be provided. Thereby, when electric power is supplied to the primary coil 23 and the secondary coil 13 to form an electromagnet, the lines of magnetic force are repelled and the power feeding unit 21 is prevented from shifting in the traveling direction. It can move in a desired direction. In this case, as shown in FIG. 10, the guide member 96 may have a structure in which the power receiving unit 12 side gradually spreads outward in a cross-sectional view. Thus, when the power feeding unit 21 is released from the connection with the power receiving unit 12 and moves toward the power feeding unit moving unit 50, the power feeding unit 21 does not come out of the guide member 96 even if the position is slightly shifted. In addition, although the guide member 96 demonstrated using the cylindrical thing in FIG. 10, it should just be able to guide the electric power feeding part 21 at the time of the movement of the electric power feeding part 21, and is not limited to a cylindrical shape.

  In the present embodiment, an electric vehicle has been described as an example. However, the present invention is not limited to this and may be mounted on a vehicle driven by a rechargeable battery, for example, a hybrid vehicle.

  The present invention relates to a charging device for an electric vehicle such as an electric vehicle. Therefore, it can be used in the automobile manufacturing industry.

DESCRIPTION OF SYMBOLS 1 Electric vehicle 11 Battery 12 Power receiving part 13 Primary coil 14 Flat plate part 15 Recessed part 16 2nd flat plate part 21 Power feeding part 22 Installation recessed part 23 Secondary coil 24 Flat plate part 25 Convex part 25a Conical part 25b Peripheral wall part 26 Through-hole 30 Power receiving part Power supply means 40 Power supply part power supply means 50 Power supply part moving means 51 Electromagnet 60 Moving part power supply means 70 Holding member 71 First holding part 72 Second holding part 73 Holding part concave part 81 Convex part 82 Concave part 83 Through hole I Power supply means

Claims (2)

A power receiving unit including a secondary coil connected to the rechargeable battery of the vehicle including the rechargeable battery;
A power feeding unit including a primary coil and installed on the ground side, and having a hollow portion that moves to the power receiving unit side and engages with a protrusion provided in the power receiving unit when facing the power receiving unit of the vehicle When,
Positioning means for positioning the power feeding unit relative to the power receiving unit when fitting the protrusion of the power receiving unit and the recess of the power feeding unit;
A power supply unit that is provided in the power supply unit and supplies power to the primary coil; and
The positioning means is a slope portion provided in each of the protruding portion of the power receiving unit and the recessed portion of the power feeding unit, and configured to fit each other,
A discharge means for discharging foreign matter intervening in the fitting surface when fitting the protrusion of the power receiving unit and the recess of the power feeding unit;
The discharging means is a through hole that faces the fitting surface and penetrates the power feeding part, and the through hole is provided at the deepest position of the depression part of the power feeding part, which is a lower part of the slope part of the slope part. A vehicle charging device. A power receiving unit power supply means connected to the power receiving unit and configured to supply power to the secondary coil;
A power feeding unit moving means provided on the opposite side of the surface facing the power receiving unit of the power feeding unit, and having an electromagnet,
The secondary coil and the primary coil are wound around a core core that is a ferromagnetic body,
Supplying power to the primary coil by the power feeding unit power supply means to form a magnetic field;
In addition, the power receiving unit power supply means supplies power to the secondary coil to form a magnetic field that attracts the primary coil, and supplies power to the electromagnet of the power feeding unit moving means. Forming a repulsive magnetic field with the coil,
The vehicle charging device according to claim 1, wherein the power feeding unit is moved to the power receiving unit side by the magnetic field to fit the power feeding unit and the power receiving unit.

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