JP2015019453A - Non-contact power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve inexpensiveness of a vehicle and simplification of a configuration by oppositely arranging a power supply coil and a power receiving coil over a suitable distance with high transmission efficiency and omitting a vehicle height adjustment mechanism, and to prevent a height sensor from being stained or broken due to foreign substances such as splashed mud or a stone because of no installation of the height sensor.SOLUTION: A non-contact power supply system including a power supply device having a power supply coil and a power receiving device having a power receiving coil and performing non-contact power supply from the power supply coil to the power receiving coil includes: a bag body for supporting the power supply coil and moving the power supply coil to the power receiving coil by expansion; a spacer supported by the power supply coil and abutted on the power receiving device to oppositely arrange the power supply coil and the power receiving coil over a distance; and gas supply means for supplying gas to the bag body.

Description

  The present invention relates to a non-contact power feeding system.

  Patent Document 1 below discloses a power receiving support device that can perform appropriate support regarding correction of the position of a vehicle when receiving power from a power feeding device. The power receiving support device adjusts the vehicle height when the power receiving efficiency specifying unit that specifies the power receiving efficiency of the power receiving unit at the current position of the vehicle and the power receiving efficiency specified by the power receiving efficiency specifying unit is less than a threshold value. It is determined whether or not the power receiving efficiency is equal to or higher than a threshold value, and when it is determined that the power receiving efficiency is equal to or higher than the threshold value, a support unit that performs support for adjusting the vehicle height is provided.

  Patent Document 2 below describes a vehicle that can efficiently supply power from the power supply side to the power receiving side using the vehicle height adjustment function when performing non-contact power supply to an electric vehicle having a vehicle height adjustment function. A resonant non-contact power feeding system is disclosed. The vehicle resonance type non-contact power feeding system includes a power feeding side facility including a high frequency power source and a primary side resonance coil, a power receiving facility including a secondary side resonance coil for receiving power from the primary side resonance coil, and a vehicle. And an electric vehicle equipped with a high adjustment device. The power receiving facility uses a rectifier that rectifies the power received by the secondary resonance coil, a secondary battery that is supplied with the power rectified by the rectifier, and a vehicle height adjustment device that is used when charging the secondary battery. And a control device that performs impedance adjustment of a resonance system including a secondary resonance coil and a secondary resonance coil.

  Further, in Patent Document 3 below, electric power from an external power transmission unit is provided in a vehicle capable of receiving and storing electric power by a power receiving unit in a contactless manner, so that the driver can easily charge and perform charging. A parking assistance device that can reduce the complexity of this is disclosed. The parking assist device includes a vehicle control unit that controls the vehicle so that the power transmission unit and the power reception unit are aligned based on the power reception status of the power reception unit, and a height sensor that detects a change in the vehicle height of the vehicle. The vehicle control unit uses the relationship between the power reception status and the distance between the power transmission unit and the power reception unit, which is predetermined according to the output of the height sensor, to perform alignment based on the output of the height sensor and the power reception status. Do.

JP 2010-233394 A JP 2012-34468 A Japanese Patent No. 4868903

  By the way, since the apparatus described in the said patent documents 1 and 2 needs to be provided with a vehicle height adjustment mechanism, there exists a problem that a vehicle becomes expensive and a structure becomes complicated. Moreover, although the apparatus described in the literature 3 has provided the height sensor in the bottom face of a vehicle, there exists a possibility that a height sensor may be polluted or damaged by foreign materials, such as splashed mud and a stone.

  The present invention has been made in view of the above-described circumstances, and lowers the price of a vehicle by disposing a feeding coil and a receiving coil at an appropriate distance with high transmission efficiency and not providing a vehicle height adjustment mechanism. The object of the present invention is to simplify the structure and to prevent the height sensor from being contaminated or damaged by foreign matter such as sludge and stones without the height sensor.

  In order to achieve the above object, according to the present invention, as a first solution, a power feeding device having a power feeding coil and a power receiving device having a power receiving coil are provided, and non-contact power feeding is performed from the power feeding coil to the power receiving coil. A non-contact power feeding system for performing a bag support that supports the power feeding coil and expands the power feeding coil toward the power receiving coil by being inflated, and is supported by the power feeding coil and is in contact with the power receiving device. A means is provided that includes a spacer for disposing the power feeding coil and the power receiving coil so as to face each other at a distance, and a gas supply means for supplying gas to the bag body.

  In the present invention, as the second solving means, in the first solving means, a means is adopted in which the spacer abuts against a power receiving coil of the power receiving device.

  In the present invention, as a third solution, in the first or second solution, the power receiving device is a vehicle and the power receiving coil is provided on a bottom surface, and the spacer has a flat top surface. Adopt the means.

  According to the present invention, as the fourth solution means, in the third solution means, the power supply coil and the bag body are provided in a recess provided on the ground side where the vehicle can stop. Adopt means.

  In the present invention, as the fifth solving means, in the fourth solving means, a means is provided that further includes a movement restricting portion that is provided in the recess and restricts the movement of the feeding coil.

  In the present invention, as a sixth solving means, in any one of the first to fifth solving means, a means is adopted in which the spacer is detachable from the feeding coil.

  According to the present invention, by supplying the gas and inflating the bag body, the feeding coil 4 and the receiving coil can be placed opposite each other with a high transmission efficiency through the spacer 6. Further, according to the present invention, it is possible to reduce the price of the vehicle and simplify the configuration by not providing the vehicle height adjusting mechanism, and it is possible to reduce the height by foreign matters such as mud and stones without the height sensor. There is no risk of sensor damage or damage.

It is a block diagram which shows the function structure of the non-contact electric power feeding system which concerns on 1st Embodiment of this invention. It is the side view (a) of the bag body 5 and the spacer 6 in 1st Embodiment of this invention, and the top view (b) of the spacer 6. FIG. It is a side view which shows the state which the bag body 5 in 1st Embodiment of this invention expanded. It is the side view (b) which shows the side view (a) of the bag body 5, the spacer 6, and the movement control part 9 in the non-contact electric power feeding system which concerns on 2nd Embodiment of this invention, and the state which the bag body 5 expanded.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
First, the first embodiment will be described. As shown in FIG. 1, the non-contact power feeding system according to the first embodiment includes a ground power feeding device S (power feeding device) embedded in the ground G and a vehicle M (power receiving device) that receives power from the ground power feeding device S. It has. Such a non-contact power feeding system performs non-contact power feeding from the ground power feeding device S to the vehicle M based on a magnetic field resonance method which is one of the non-contact power feeding methods.

  The ground power supply device S is embedded in, for example, a stop position at an intersection or a railroad crossing or a parking position of a parking lot, and performs non-contact power supply to a vehicle M parked at the parking position. As shown in FIG. 1, the ground power supply device S includes a power source 1, a rectifier circuit 2, a power supply circuit 3, a power supply coil 4, a bag body 5, a spacer 6, a gas supply / exhaust mechanism 7, and a power supply control unit 8. I have. The gas supply / exhaust mechanism 7 is gas supply means in the present embodiment.

  The power source 1 is an AC power source having an output end connected to the input end of the rectifier circuit 2 and supplying AC power necessary for power supply to the vehicle M to the rectifier circuit 2. Such a power source 1 is, for example, a system power source or a power generator that supplies three-phase AC power such as 200 V or 400 V, or single-phase AC power of 100 V.

  The rectifier circuit 2 has an input terminal connected to the power source 1 and an output terminal connected to the power feeding circuit 3. Such a rectifier circuit 2 rectifies AC power supplied from the power source 1 to convert it into DC power, and outputs the DC power to the power feeding circuit 3. Note that a DC power source such as a solar battery may be used as the power source 1 and the rectifier circuit 2 may be omitted (that is, DC power is supplied from the DC power source to the power feeding circuit 3). The power source 1 and the rectifier circuit 2 may be separated from the power feeding circuit 3 and installed without being embedded in the ground G.

  The power supply circuit 3 has an input end connected to the rectifier circuit 2 and an output end connected to both ends of the power supply coil 4. Such a power supply circuit 3 includes a power supply coil 4 and a resonance capacitor that constitutes a power supply side resonance circuit, and receives DC power supplied from the rectifier circuit 2 based on a control command input from the power supply control unit 8. This is a kind of inverter that converts AC power (high frequency power) having a frequency higher than that of the AC power of the power source 1 and supplies the AC power to the feeding coil 4. The power feeding circuit 3 is installed on the ground G at the parking / stopping position, and is connected to the power feeding coil 4 by a flexible electric cable. The power feeding circuit 3 may be embedded in the ground G instead of on the ground G, or the flexible electric cable may be extended and the power feeding circuit 3 may be installed away from the ground G. .

  The feeding coil 4 is a circular type coil or a solenoid type coil. In the case of a circular type coil, the coil axis is set in a vertical direction (vertical direction), and in the case of a solenoid type coil, the attitude is set in a horizontal direction. And it is supported by the bag body 5 in an exposed state or in a state molded with a nonmagnetic and nonconductive material such as plastics, fiber reinforced plastics, ceramics or a composite material thereof (FIGS. 2 and 3). reference). Such a feeding coil 4 has both ends connected to the output end of the feeding circuit 3 and generates a magnetic field by supplying high-frequency power from the feeding circuit 3 to feed the vehicle M in a contactless manner. I do.

  The bag body 5 is a kind of balloon in which a stretchable elastic material such as rubber is formed into a film shape, and is installed on the ground G. Moreover, the bag body 5 is installed so that the one end surface (lower surface) of the power supply coil 4 is in contact with the upper side 5a, and supports the power supply coil 4 (see FIGS. 2 and 3). The bag body 5 is sealed, and when gas (for example, air) is supplied from the gas supply / exhaust mechanism 7, the bag body 5 expands and lifts the power supply coil 4 upward, whereby the power supply coil 4 is described later. Move toward the M power receiving coil 11.

  The spacer 6 is a plate-like member having a specific hardness that does not reduce the efficiency of non-magnetic and non-conductive non-contact power feeding, such as plastic, and is disposed on the other end surface (upper surface) of the feeding coil 4. These are supported by the feeding coil 4 (see FIGS. 2 and 3). Here, the specific hardness means a hardness that hardly deforms when the bag body 5 expands and the spacer 6 is pressed against the power receiving coil 11. The spacer 6 is formed to have a thickness equivalent to the distance at which the transmission efficiency of non-contact power feeding between the power feeding coil 4 and the power receiving coil 11 of the vehicle M is increased. Further, the spacer 6 has a flat upper surface 6a so that the posture is stable when it contacts the power receiving coil 11 and does not get in the way when the vehicle M passes over the upper surface 6a.

  The gas supply / exhaust mechanism 7 is a type of pump that supplies gas into the bag body 5 based on a control command input from the power supply control unit 8 and exhausts the gas from the bag body 5. In such a gas supply / exhaust mechanism 7, a pressure gauge is provided at a supply port of a pump that supplies gas to the bag body 5, and a detection result (detection signal) by the pressure gauge is output to the power supply control unit 8. . Moreover, in order to exhaust gas, it has a valve that can be opened and closed by a command from the power supply control unit 8, for example, a valve that can be opened and closed by an electric signal.

  The power supply control unit 8 includes a microprocessor, a memory, and the like, and is a software-type control device that functions based on a power supply control program, and controls the power supply circuit 3 and the gas supply / exhaust mechanism 7. The detailed processing of the power supply control unit 8 will be described in the operation description to be described later.

  The vehicle M is an automobile that is driven by a driver and travels on a road. For example, the vehicle M is an electric car or a hybrid car that travels using a battery as a power source. As illustrated in FIG. 1, the vehicle M includes a power receiving coil 11, a power receiving circuit 12, a charging circuit 13, a battery 14, and a power receiving control unit 15. Although omitted in FIG. 1, the vehicle M naturally includes components necessary for traveling such as a traveling motor, an operation handle, a brake, and an engine in the case of a hybrid vehicle.

  The power receiving coil 11 is a circular type coil or a solenoid type coil. In the case of a circular type coil, the power receiving coil 11 is opposed to the power supply coil 4 and enables highly efficient non-contact power supply to and from the power supply coil 4. It is provided at the bottom of the vehicle M in such a posture that the axis is in the vertical direction (vertical direction), and in the case of a solenoid type coil, the coil axis is horizontal and parallel to the coil axis of the feeding coil 4. Both ends of the power receiving coil 11 are connected to the input ends of the power receiving circuit 12. When the magnetic field of the power feeding coil 4 acts, an electromotive force is generated by electromagnetic induction, and the electromotive force is output to the power receiving circuit 12. The feeding coil 4 and the receiving coil 11 are both of the same type, that is, either a circular type coil or a solenoid type coil, but the sizes of the feeding coil 4 and the receiving coil 11 are the same. The shape may be the same or different as long as highly efficient non-contact power feeding is possible.

  The power receiving circuit 12 has an input end connected to both ends of the power receiving coil 11, and an output end connected to the input end of the charging circuit 13. Such a power receiving circuit 12 includes a power receiving coil 11 and a resonance capacitor that constitutes a power receiving side resonance circuit. The AC power supplied from the power receiving coil 11 is converted into DC power and supplied to the charging circuit 13. Circuit. In order to enable highly efficient non-contact power feeding, the resonance capacitor of the power receiving circuit 12 has the same or almost the same frequency as the resonance frequency of the power feeding side resonance circuit and the resonance frequency of the power receiving side resonance circuit. It is set to be.

  The charging circuit 13 has an input terminal connected to the output terminal of the power receiving circuit 12, and an output terminal connected to the input terminal of the battery 14. The power (DC power) supplied from the power receiving circuit 12 is used to charge the battery 14. It is a kind of DC-DC converter that converts the voltage into a suitable voltage and charges the battery 14. The battery 14 is a rechargeable battery (for example, a secondary battery such as a lithium ion battery or a nickel metal hydride battery) mounted on the vehicle M, and supplies driving power to a travel motor or the like (not shown). The power receiving control unit 15 is a software-type control device that includes a microprocessor, a memory, and the like and functions based on a power receiving control program, and controls the charging circuit 13.

Next, the operation of the non-contact power feeding system configured as described above will be described.
First, operations of the vehicle M and the ground power supply device S at the time of non-power supply will be described. The power receiving control unit 15 of the vehicle M stops the charging circuit 13 when power is not supplied (for example, during normal operation of the vehicle M by the user). On the other hand, the power supply control unit 8 of the ground power supply device S stops the power supply circuit 3 when the power is not supplied, that is, when the vehicle M to be supplied is not parked at the parking position, and the bag body 5 is completely The gas supply / exhaust mechanism 7 is made to exhaust the gas in the bag body 5 so as to contract. This can be realized by opening an openable / closable valve for gas exhaust.

  Thereafter, the user drives the vehicle M, moves the vehicle M to the installation location of the ground power supply device S, and stops the vehicle. The power receiving control unit 15 of the vehicle M grasps the installation position of the ground power feeding device S from the output of a position sensor such as a sound wave sensor or an optical sensor (not shown). When detecting that the power receiving control unit 15 has moved from the output of the position sensor such as the sound wave sensor or the optical sensor to above the ground power supply device S as described above, the charging circuit 13 starts the charging operation. However, since the non-contact power feeding is not started and the output from the power receiving circuit 12 is zero, the output of the charging circuit 13 is also zero and no power is supplied to the battery 14.

  On the other hand, the power supply control unit 8 of the ground power supply apparatus S grasps the position of the vehicle M from the output of a position sensor such as a sound wave sensor or an optical sensor (not shown) as with the vehicle M. When the power supply control unit 8 detects that the vehicle M has moved above the ground power supply device S from the output of a position sensor such as a sound wave sensor or an optical sensor, the gas supply / exhaust mechanism 7 so that the bag 5 expands. To supply gas. Note that the openable / closable valve for exhausting the gas is closed.

  Here, the power supply control unit 8 controls the gas supply / exhaust mechanism 7 based on a detection signal input from the pressure gauge of the gas supply / exhaust mechanism 7. That is, the power supply control unit 8 causes the gas supply / exhaust mechanism 7 to supply gas until the detection result by the pressure gauge reaches a specific pressure. Thereby, the power feeding coil 4 is lifted upward by the inflated bag body 5 and moves toward the power receiving coil 11.

  Then, the power supply control unit 8 stops the gas supply when a specific pressure is reached. Here, the specific pressure is a pressure determined by the elastic modulus of the material of the bag body 5. If the bag body 5 is not deformed and the gas is continuously supplied, the elastic limit of the bag body 5 is exceeded and the bag body 5 is damaged. The pressure is such that As a result, as shown in FIG. 3, the upper surface 6 a of the spacer 6 comes into contact with the power receiving coil 11 of the vehicle M, and the power feeding coil 4 and the power receiving coil 11 are arranged to face each other with the spacer 6 therebetween. That is, the feeding coil 4 and the receiving coil 11 are in a state of being opposed to each other with a high transmission efficiency distance in the magnetic field resonance method.

  Subsequently, the power supply control unit 8 causes the power supply circuit 3 to start a power supply operation. Here, since the power feeding coil 4 and the power receiving coil 11 are arranged facing each other with a high transmission efficiency in the magnetic field resonance method, power is supplied from the power feeding coil 4 to the power receiving coil 11 with high transmission efficiency. The Electric power is output from the power receiving circuit 12, the charging circuit 13 starts supplying power to the battery 14, and charging of the battery is started.

  On the other hand, the power reception control unit 15 of the vehicle M appropriately charges the battery 14 by controlling the charging circuit 13 while monitoring the charging state of the battery 14. When detecting that the battery 14 is in a fully charged state, the power receiving control unit 15 notifies the battery 14 in a fully charged state by a display unit (not shown) or the like. Then, the power supply control unit 8 of the ground power supply device S stops the control of the power supply circuit 3 and controls the gas supply / exhaust mechanism 7 to completely contract the bag body 5. For example, by stopping the pump and opening an openable / closable valve for gas exhaust, the gas in the bag body 5 is extracted and completely contracted. When the user recognizes that the battery 5 is fully charged and the bag body 5 is completely contracted by a display (not shown) or the like, the user operates the vehicle M and moves from the place where the ground power supply device S is installed.

  On the other hand, when the user operates the vehicle M and moves from the installation location of the ground power supply device S in a state where the bag body 5 is inflated, the power supply control unit 8 of the ground power supply device S has a sound sensor (not shown) or When it is detected that the vehicle M has moved from the output of a position sensor such as an optical sensor, the control of the power feeding circuit 3 is stopped and the gas supply / exhaust mechanism 7 is controlled to completely contract the bag body 5 so that the spacer 6 Avoid contact with the power receiving coil 11. For example, by stopping the pump and opening an openable / closable valve for gas exhaust, the gas in the bag body 5 is extracted and completely contracted. This prevents electrical damage to the power feeding circuit 3 and the power receiving circuit 12, and mechanical damage to the bag body 5, the power feeding coil 4, and the power receiving coil 11.

  According to the present embodiment, the bag body 5 is inflated so that the power feeding coil 4 and the power receiving coil 11 are arranged to face each other with a distance of high transmission efficiency therebetween via the spacer 6. can do. Even when the vehicle M has a suspension and moves up and down during charging, the gas in the bag body 5 is also elastic and allows deformation of the bag body 5, so that the spacer 6, the power feeding coil 4, and the power receiving coil 11 are excessive. Mechanical force is prevented from being damaged due to excessive force. In addition, according to the present embodiment, it is possible to reduce the price of the vehicle M and simplify the configuration by not providing the vehicle height adjustment mechanism, and it is possible to reduce the foreign matter such as mud and stones by not providing the height sensor. Therefore, there is no fear that the height sensor is soiled or damaged.

[Second Embodiment]
Next, a non-contact power feeding system according to the second embodiment will be described.
As shown in FIG. 4, the non-contact power feeding system according to the second embodiment includes a point where the power feeding circuit 3 is embedded in the ground G and a position where the bag body 5 is parked and stopped (a place where the vehicle M can stop). In place of the ground G, it is installed in a recess C provided on the ground G, that is, the feeding coil 4, the bag 5 and the spacer 6 are accommodated in the recess C, and a new movement restricting portion 9 is provided. In the point provided in the recessed part C, it differs from the said 1st Embodiment. Other components are the same as those in the first embodiment. Therefore, in the second embodiment, the description of the same components as in the first embodiment is omitted.

  As in the first embodiment, the power feeding circuit 3 converts the DC power supplied from the rectifier circuit 2 into AC power (high frequency power) based on a control command input from the power feeding control unit 8 to convert the power feeding coil 4. Is a kind of inverter that is connected to the feeding coil 4 by a flexible electric cable. Further, unlike the first embodiment, the power feeding circuit 3 is embedded in the ground G near the recess C.

  Similarly to the first embodiment, the power supply coil 4 is a circular coil or solenoid coil that supplies power to the vehicle M in a non-contact manner by generating a magnetic field when high-frequency power is supplied from the power supply circuit 3. is there. Further, unlike the first embodiment, the feeding coil 4 is accommodated in the recess C when the bag body 5 is contracted.

  As in the first embodiment, the bag body 5 is arranged such that the feeding coil 4 is in contact with the upper end 5a of the one end surface (lower surface), supports the feeding coil 4, and gas is supplied from the gas supply / exhaust mechanism 7. Then, the power feeding coil 4 is moved toward the power receiving coil 11 by expanding and lifting the power feeding coil 4 upward. Further, unlike the first embodiment, the bag body 5 is installed at the bottom of the recess C instead of the ground G.

  As in the first embodiment, the spacer 6 is disposed on the other end surface (upper surface) of the power feeding coil 4 so that the distance between the power feeding coil 4 and the power receiving coil 11 of the vehicle M is high. A thickness is formed. Further, unlike the first embodiment, the spacer 6 is accommodated in the recess C when the bag body 5 is contracted.

  The movement restricting portion 9 is installed on the inner surface of the concave portion C facing the peripheral surface of the power feeding coil 4 and restricts the movement of the power feeding coil 4 accommodated in the concave portion C in the horizontal direction. When the wheel of the vehicle M passes over the recess C, the power supply coil 4 is pulled by the vehicle M and moves in the recess C when the wheel contacts the spacer 6. The movement restricting unit 9 restricts the power feeding coil 4 from being drawn and moved by the vehicle M in this way. The movement restricting portion 9 is made of an elastic member such as rubber or sponge.

Next, the operation of the second embodiment configured as described above will be described. Note that description of operations similar to those of the first embodiment is omitted.
When the power supply control unit 8 of the ground power supply device S detects that the vehicle M has moved above the ground power supply device S from the output of a position sensor such as a sound wave sensor or an optical sensor (not shown), the bag body 5 is completely formed. Gas is supplied to the gas supply / exhaust mechanism 7 so as to expand.

  Here, the power supply control unit 8 controls the gas supply / exhaust mechanism 7 based on a detection signal input from the pressure gauge of the gas supply / exhaust mechanism 7. That is, the power supply control unit 8 causes the gas supply / exhaust mechanism 7 to supply gas until the detection result by the pressure gauge reaches a specific pressure. Thereby, the power feeding coil 4 is lifted upward by the inflated bag body 5 and moves toward the power receiving coil 11.

  Then, the power supply control unit 8 stops the gas supply when a specific pressure is reached. As a result, as shown in FIG. 4 (b), the upper surface 6 a of the spacer 6 comes into contact with the power receiving coil 11 of the vehicle M, and the power feeding coil 4 and the power receiving coil 11 are arranged to face each other with the spacer 6 therebetween. The That is, the feeding coil 4 and the receiving coil 11 are in a state of being opposed to each other with a high transmission efficiency distance in the magnetic field resonance method.

  Subsequently, the power supply control unit 8 causes the power supply circuit 3 to start a power supply operation. Here, since the power feeding coil 4 and the power receiving coil 11 are arranged facing each other with a high transmission efficiency in the magnetic field resonance method, power is supplied from the power feeding coil 4 to the power receiving coil 11 with high transmission efficiency. The

  On the other hand, the power reception control unit 15 of the vehicle M appropriately charges the battery 14 by controlling the charging circuit 13 while monitoring the charging state of the battery 14. When detecting that the battery 14 is in a fully charged state, the power receiving control unit 15 notifies the battery 14 in a fully charged state by a display unit (not shown) or the like. When the user recognizes that the battery is fully charged by a display unit (not shown) or the like, the user drives the vehicle M and moves from the place where the ground power supply device S is installed.

  Here, since the power feeding circuit 3 is embedded in the ground G and the power feeding coil 4, the bag body 5 and the spacer 6 are accommodated in the recess C, the power feeding circuit 3, the power feeding coil 4, the bag body 5 and the spacer 6 Collision can be avoided. Even when the wheel of the vehicle M passes over the recess C, the movement restriction unit 9 restricts the movement of the power supply coil 4 in the horizontal direction, so that the power supply coil 4 is prevented from being pulled by the vehicle M. it can.

  According to the present embodiment, by inflating the bag body 5, the feeding coil 4 and the receiving coil 11 can be placed opposite to each other with a high transmission efficiency through the spacer 6. Further, according to the present embodiment, it is possible to reduce the price of the vehicle and simplify the configuration by not providing the vehicle height adjustment mechanism, and it is possible to prevent the foreign matter such as mud and stones splashed by not providing the height sensor. There is no risk of the height sensor becoming dirty or damaged.

  In addition, according to the present embodiment, the power feeding circuit 3 is embedded in the ground G, and the power feeding coil 4, the bag body 5, and the spacer 6 are accommodated in the recess C, whereby the wheels of the vehicle M are Since it can avoid colliding with the electric power feeding coil 4, the bag body 5, and the spacer 6, it does not interfere with driving | running | working of the vehicle M. FIG. Further, according to the present embodiment, even when the wheel of the vehicle M passes over the recess C, the movement restriction unit 9 restricts the movement of the power supply coil 4 in the horizontal direction. You can avoid being attracted by.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, For example, the following modifications can be considered.
(1) In the first and second embodiments, the spacer 6 may be detachable. For example, in the magnetic resonance type non-contact power feeding, when there are a plurality of standards having different transmission efficiency distances between the feeding coil 4 and the power receiving coil 11, the spacers 6 having different thicknesses may be replaced according to the standards. Also good. For example, this is a case where the size and shape of the power receiving coil 11 differ depending on the standard.

(2) In the first and second embodiments, when the feeding coil 4 is a circular coil, the coil axis is in the vertical direction, and in the case of a solenoid coil, the coil axis is in the horizontal direction. Although the present invention is applied to the non-contact power feeding system provided with the ground power feeding device S provided, the present invention is not limited to this. For example, when the power feeding coil 4 is a circular coil, the present invention is applied to a non-contact power feeding system including a ground power feeding device S provided in a posture (horizontal posture) or an inclined posture with a coil axis as a horizontal direction. Also good. That is, the spacer 6 is installed on one end surface of the feeding coil 4 in a horizontal posture or an inclined posture, and the bag body 5 is installed between the wall for attaching the feeding coil 4 and the other end surface of the feeding coil 4. To.

(3) In the first and second embodiments, the spacer 6 is a plate-like member, but the present invention is not limited to this. For example, the spacer 6 may be a bar-like member having the same height as the distance with high transmission efficiency between the power feeding coil 4 and the power receiving coil 11 of the vehicle M. In the first and second embodiments, the spacer 6 is in contact with the power receiving coil 11 when the bag body 5 is inflated, but may be in contact with the bottom surface of the vehicle M. For example, a bar-shaped spacer 6 is installed in a vertical posture on the peripheral surface of the power supply coil 4, the spacer 6 abuts on the bottom surface of the vehicle M, and the power supply coil 4 and the power reception coil 11 keep a high transmission efficiency distance. It is in a state of being opposed to each other.

(4) In the first and second embodiments, the power feeding device is the ground power feeding device S embedded in the ground, and the power receiving device is the vehicle M traveling on the ground. The present invention is not limited to this. For example, the power feeding device may be an underwater power feeding device installed underwater, and the power receiving device may be an underwater vehicle that moves underwater. The underwater vehicle must take out water quality data when investigating the water quality in the water. In this case, a communication antenna may be provided inside the bag body 5 provided in the underwater power feeding device, and the water quality data may be taken out via the communication antenna.

  In other words, the underwater power supply device is wired to a ground water quality data management device or the like via a communication cable, and the water quality data is transmitted via the communication antenna when the underwater vehicle is transmitting power (when the battery 14 is charged). The water quality data received from the underwater vehicle via the communication antenna may be wired to the water quality data management device or the like. Further, the fluid supplied into the bag body 5 may be a liquid other than the gas body. In particular, in the case of the magnetic field resonance method, the liquid may be ionic salt water, distilled water, alcohol, or the like as long as it does not damage the bag body 5. In particular, since the specific gravity of gas and liquid is different, the balance of the power feeding device can be adjusted by using the gas in combination.

DESCRIPTION OF SYMBOLS 1 Power supply 2 Rectification circuit 3 Feeding circuit 4 Feeding coil 5 Bag body 5a Upper side 6 Spacer 6a Upper surface 7 Gas supply / exhaust mechanism (gas supply means)
DESCRIPTION OF SYMBOLS 8 Power supply control part 9 Movement control part 11 Power receiving coil 12 Power receiving circuit 13 Charging circuit 14 Battery 15 Power receiving control part C Concave part G Ground M Vehicle (power receiving apparatus)
S Ground power supply device (power supply device)

Claims (6)

A non-contact power feeding system comprising a power feeding device having a power feeding coil and a power receiving device having a power receiving coil, and performing non-contact power feeding from the power feeding coil to the power receiving coil,
A bag that supports the power supply coil and moves the power supply coil toward the power reception coil by expanding;
A spacer that is supported by the power feeding coil, abuts against the power receiving device, and places the power feeding coil and the power receiving coil opposite to each other at a distance;
A non-contact power feeding system comprising gas supply means for supplying gas to the bag body.   The contactless power feeding system according to claim 1, wherein the spacer is in contact with a power receiving coil of the power receiving device. The power receiving device is a vehicle and the power receiving coil is provided on the bottom surface,
The contactless power supply system according to claim 1, wherein the spacer has a flat upper surface.   The contactless power feeding system according to claim 3, wherein the power feeding coil and the bag body are provided in a recess provided on the ground side where the vehicle can stop.   The non-contact power feeding system according to claim 4, further comprising a movement restricting portion that is provided in the recess and restricts movement of the power feeding coil.   The contactless power feeding system according to claim 1, wherein the spacer is detachable from the power feeding coil.

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