JP2014171381A - Heat transfer device, power feeding device, and non-contact power feeding system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat transfer device which properly radiates heat generated by non-contact power feeding without needing the time for positioning when a power reception device and a power feeding device may move relative to each other, and to provide the power feeding device and a non-contact power feeding system.SOLUTION: A non-contact power feeding system 1 performs non-contact power feeding between a vehicle 10 and a parking station 20 and includes a heat transfer device 30 for transferring heat generated by the non-contact power feeding from the vehicle 10 to the parking station 20. The heat transfer device 30 includes a flexible heat transfer member 32 which inclines in a direction that the vehicle 10 moves.

Description

  The present invention relates to a heat transfer device, a power feeding device, and a non-contact power feeding system.

  In the following Patent Document 1, a vehicle that receives high-frequency power in a non-contact manner from a primary coil by using magnetic coupling or magnetic resonance between a primary coil provided on a road or the like and a secondary coil provided on a vehicle. An on-board power receiving device is disclosed. In a non-contact power feeding system using such magnetic coupling or the like, a coil or the like that exchanges high-frequency power generates heat, and thus cooling is performed.

  The vehicle-mounted power receiving device disclosed in Patent Document 1 includes a power receiving coil, a coil chamber that houses the power receiving coil, and a bidirectional fan that can switch a rotation direction between forward rotation and reverse rotation. Yes. As a result, when the power receiving coil needs to be cooled, a heat dissipation flow flows from the passenger compartment side to the outside air via the power receiving coil, and when the power storage device needs to be warmed up, it passes from the outside air via the power receiving coil. The warm-up flow that flows to the passenger compartment side.

  Patent Document 2 below discloses a charging unit that transfers power in a contactless manner using a power receiving device having a power receiving unit and a battery and a power feeding device having a power feeding unit. In this charging unit, a heat conducting part is provided at a portion where the power receiving device and the power feeding device are in contact with each other so that the heat generated in the power receiving device is transmitted to the power feeding device. It is designed to dissipate heat to the outside.

JP 2012-156083 A JP 2012-130177 A

However, the above prior art has the following problems.
Since the technique of Patent Document 1 is a method of cooling with a fan mounted on a moving vehicle, there is a problem that the moving vehicle is enlarged by the cooling device.
The technology of Patent Document 2 is a method of transferring heat from the power receiving device side to the power feeding device by contact without mounting a fan or the like on the power receiving device side to be cooled. If the position is not strictly fixed, the heat transfer efficiency is extremely reduced. For this reason, when a moving body such as a moving vehicle is to be cooled, there is a problem that it takes time to accurately position the moving body when the vehicle is stopped.

  The present invention has been made in view of the above problems, and when the power receiving device and the power feeding device are in a relatively movable relationship, the heat generated by the non-contact power feeding can be appropriately detected without taking time for positioning. An object of the present invention is to provide a heat transfer device, a power feeding device, and a non-contact power feeding system that can dissipate heat.

  In order to solve the above-described problems, the present invention provides a heat transfer device that transfers heat between a power supply device for non-contact power supply, at least one of which is movable, and the power reception device, the power reception device and the power supply device. Flexible heat transfer having at least one of the property of being able to tilt in the movable direction and the property of being able to expand and contract in the direction perpendicular to the direction. The structure of having a member is adopted.

  In the present invention, each of the power receiving device and the power feeding device includes a coil that performs the contactless power feeding, and a power transmission provided around one of the coils of the power receiving device and the power feeding device. Adopting a configuration comprising a heat member, and the flexible heat transfer member that stands up around the other coil of the power receiving device and the power supply device and is thermally coupled to the heat transfer member To do.

  Moreover, in this invention, the structure that the said flexible heat-transfer member is electrically earth | grounded is employ | adopted.

  Moreover, in this invention, the structure that the said flexible heat-transfer member contains a metal brush is employ | adopted.

  Moreover, in this invention, the said metal brush employ | adopts the structure that it is planted by the metal pipe through which a refrigerant | coolant distribute | circulates.

  Moreover, in this invention, the structure that the said flexible heat-transfer member contains a spring member is employ | adopted.

  Moreover, in this invention, the said spring member employ | adopts the structure of urging | biasing the metal pipe through which a refrigerant | coolant distribute | circulates to the said heat-transfer member.

  Moreover, in this invention, the structure that the said flexible heat transfer member contains the expansion / contraction member which contacts the said heat transfer member by injection | pouring of a refrigerant | coolant is employ | adopted.

  Moreover, in this invention, the said expansion / contraction member employ | adopts the structure that at least any one of a rod-shaped tube body and an arch-shaped tube body is included.

  In the present invention, a configuration is adopted in which one of the power receiving device and the power feeding device is a vehicle, and the other of the power receiving device and the power feeding device is a stop station where the vehicle stops. .

  Moreover, in this invention, the structure that the said heat-transfer member is provided with a shield function is employ | adopted.

  Further, the present invention provides a power feeding device that performs non-contact power feeding with a power receiving device, wherein at least one of the power receiving device and the power feeding device, which are movable, transfers heat generated by the non-contact power feeding from one to the other. A power supply device having a heat device, wherein the heat transfer device includes a flexible heat transfer member having at least one of a property of being tiltable in the movable direction and a property of being stretchable in a direction perpendicular to the direction. The structure of having is adopted.

  Furthermore, the present invention is a non-contact power feeding system that performs non-contact power feeding between a power receiving device and a power feeding device, at least one of which is movable, wherein the power receiving device and the power feeding device are switched from one to the other. A heat transfer device for transferring heat generated by contact power supply, wherein the heat transfer device is at least one of a property of being tiltable in the movable direction and a property of being stretchable in a direction perpendicular to the direction; The structure of having a flexible heat transfer member having the above is adopted.

According to the present invention, even if the relative position between the power receiving device and the power feeding device is not fixed, the flexible heat transfer member is tilted in the moving direction thereof, so that the thermal connection state between the power receiving device and the power feeding device is maintained. Is done. For this reason, it is possible to obtain a high cooling capacity while allowing positional deviation.
Therefore, when the power receiving device and the power feeding device are in a relatively movable relationship, the heat transfer device, the power feeding device, and the non-powered device that can appropriately dissipate the heat generated by the non-contact power feeding without requiring time for positioning. A contact power supply system is obtained.

1 is an overall configuration diagram of a heat transfer device, a power feeding device, and a non-contact power feeding system in a first embodiment of the present invention. It is a top view which shows the flexible heat transfer member in 1st Embodiment of this invention. It is a whole block diagram of the heat-transfer apparatus, electric power feeder, and non-contact electric power feeding system in 2nd Embodiment of this invention. It is a section lineblock diagram showing the flexible heat transfer member in a 3rd embodiment of the present invention. It is a section lineblock diagram showing the flexible heat transfer member in a 4th embodiment of the present invention. It is a top view which shows the flexible heat transfer member in another embodiment of this invention. It is a top view which shows the flexible heat transfer member in another embodiment of this invention. It is a whole block diagram of the heat-transfer apparatus, electric power feeder, and non-contact electric power feeding system in another embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is an overall configuration diagram of a heat transfer device, a power feeding device, and a non-contact power feeding system 1 according to the first embodiment of the present invention. FIG. 2 is a plan view showing the flexible heat transfer member 32 in the first embodiment of the present invention. In the case where power is not supplied, the power supply system is not operating, and the case where power is not supplied is assumed to be a heat transfer device as a whole.
The non-contact power feeding system 1 performs non-contact power feeding between a power receiving device and a power feeding device, at least one of which is movable. In this embodiment, as shown in FIG. 1, the vehicle 10 is a power receiving device. The stop station 20 where the vehicle 10 stops is a power feeding device. The vehicle 10 is movable relative to a stop station 20 provided on the road surface 2.

  The vehicle 10 is provided with a power receiving coil 11. On the other hand, the stopping station 20 is provided with a feeding coil 21. The power receiving coil 11 is provided at the bottom of the vehicle 10 so as to be able to face the power feeding coil 21. The power receiving coil 11 has substantially the same coil diameter as that of the power feeding coil 21 and electromagnetically couples with the power feeding coil 21 to receive AC power in a non-contact manner.

  The non-contact power feeding from the power feeding coil 21 to the power receiving coil 11 in the non-contact power feeding system 1 of the present embodiment is performed based on the magnetic field resonance method. That is, a resonance capacitor (not shown) for constituting a resonance circuit is connected to each of the feeding coil 21 and the receiving coil 11. Further, for example, the capacitance of the resonance capacitor is the same as the resonance frequency of the power supply side resonance circuit composed of the power supply coil 21 and the resonance capacitor and the resonance frequency of the power reception side resonance circuit composed of the power reception coil 11 and the resonance capacitor. The frequency is set.

In addition to the power receiving coil 11, the vehicle 10 is provided with a power receiving circuit 12 and a storage battery 13.
The power receiving circuit 12 is a power conversion circuit that converts the received power received from the power supply coil 21 into DC power and supplies the DC power to the storage battery 13. In other words, the power receiving circuit 12 charges the storage battery 13 by supplying a charging current corresponding to the charging state of the storage battery 13 to the storage battery 13.
The storage battery 13 is a secondary battery capable of storing sufficient power as a driving power source for the vehicle 10, and is, for example, a lithium ion secondary battery or a nickel hydride secondary battery.

On the other hand, the power feeding coil 21 is embedded in the road surface 2 so as to be able to face the power receiving coil 11. In addition to the power supply coil 21, the stop station 20 is provided with a power supply circuit 22 and an external power source 23.
The power supply circuit 22 is a power conversion circuit that converts the power supplied from the external power supply 23 into AC power corresponding to the resonance frequency of the magnetic resonance type non-contact power supply and supplies the AC power to the power supply coil 21.
The external power source 23 is, for example, a commercial power source, a solar battery, wind power generation, or the like, and supplies the power to the power feeding circuit 22.

As shown in FIG. 1, the non-contact power feeding system 1 transfers heat generated by non-contact power feeding between the vehicle 10 and the stop station 20 from the vehicle 10 having a small heat capacity to the stop station 20 having a large heat capacity. Heat is transmitted to the heat transfer device 30 for the purpose. Alternatively, the heat transfer device 30 can transfer heat from the vehicle 10 having a low cooling capacity to the stop station 20 having a high cooling capacity. In particular, the stopping station 20 is easier to secure and access the refrigerant as will be described later than the vehicle 10 that is a moving body, and therefore, the cooling capacity of the stopping station 20 can be easily increased. Note that the heat transfer device 30 may transfer heat from the stop station 20 to the vehicle 10 depending on the heat capacity and the cooling capacity.
The heat transfer device 30 according to the present embodiment is provided with a heat transfer plate 31 (heat transfer member) provided around the power receiving coil 11 and a flexibility that stands up around the power supply coil 21 and contacts the heat transfer plate 31. And a heat transfer member 32.

  The heat transfer plate 31 is provided in the vehicle 10. The heat transfer plate 31 is provided in a posture facing the road surface 2 at the bottom of the vehicle 10. The heat transfer plate 31 is disposed on the back side of the power receiving coil 11 and does not block the electromagnetic field A formed between the power receiving coil 11 and the power feeding coil 21 during non-contact power feeding. The power receiving coil 11 is supported at the center of the heat transfer plate 31, and the heat transfer plate 31 extends so as to project outward from the power receiving coil 11.

  The heat transfer plate 31 is thermally connected to the power receiving coil 11. In the present embodiment, the power receiving circuit 12 and the storage battery 13 are provided on the heat transfer plate 31, and the heat transfer plate 31 is also thermally connected to the power receiving circuit 12 and the storage battery 13. The heat transfer plate 31 is formed of, for example, a conductive metal plate. For this reason, the heat transfer plate 31 has not only a thermal function for heat conduction but also an electrical function for grounding the vehicle 10 side such as the power receiving circuit 12.

The flexible heat transfer member 32 is provided at the stop station 20. The flexible heat transfer member 32 is provided substantially vertically upward from the stop station 20 side. The flexible heat transfer member 32 has a proximal end fixed to the stop station 20 side, a distal end is a free end, and can be tilted in a direction in which the vehicle 10 can move (in this embodiment, a plane direction along the road surface 2). Has properties.
The flexible heat transfer member 32 is formed longer than the length from the stop station 20 to the heat transfer plate 31, and the tip thereof can contact the heat transfer plate 31 with a predetermined width. The flexible heat transfer member 32 does not necessarily need to be in contact with the heat transfer plate 31 as long as it is at least thermally coupled to the heat transfer plate 31.

The flexible heat transfer member 32 of the present embodiment is made of a metal brush having heat conductivity and conductivity. For this reason, the flexible heat transfer member 32 has not only a thermal function for heat conduction but also an electric function for grounding the heat transfer plate 31 on the ground.
The flexible heat transfer member 32 is implanted in a metal pipe 33 through which cooling water flows as a refrigerant. The metal pipe 33 is provided at the stop station 20. As shown in FIG. 2, the metal pipe 33 is provided in a spiral shape around the power feeding coil 21.
The metal pipe 33 according to the present embodiment is arranged on the same plane and spreads outward with respect to the feeding coil 21.

  The metal pipe 33 is connected to the cooling water circulation device 34. The cooling water circulation device 34 circulates the cooling water in a spiral shape from the inner end of the metal pipe 33 adjacent to the power supply coil 21 toward the outer end. The flexible heat transfer member 32 is implanted in a spiral shape along the metal pipe 33. As shown in FIG. 1, the flexible heat transfer member 32 forms multiple shield walls around the electromagnetic field A. The flexible heat transfer member 32 has not only a thermal function for heat conduction but also an electric function for grounding the heat transfer plate 31 on the ground side.

Next, the power feeding operation of the non-contact power feeding system 1 configured as described above will be described.
As shown in FIG. 1, the non-contact power supply system 1 performs non-contact power supply between the vehicle 10 and the stop station 20. Since the stop position of the vehicle 10 depends on the driving operation of the driver, there is some variation. As for power feeding, the magnetic field resonance method is adopted for power transmission between the power receiving coil 11 and the power feeding coil 21, which is highly resistant to displacement of the resonance coils provided in both the vehicle 10 and the stopping station 20, and highly efficient. Long-distance power transmission can be realized.

  When non-contact power feeding is performed, the receiving coil 11 and the feeding coil 21 that exchange high-frequency power generate heat. The stop station 20 provided with the feeding coil 21 is provided on the ground side, and the heat capacity can be regarded as almost infinite. For this reason, the temperature of the feeding coil 21 hardly rises. On the other hand, the vehicle 10 provided with the power receiving coil 11 has a smaller heat capacity than the stop station 20, and the temperature of the power receiving coil 11 rises relatively easily.

  The non-contact power supply system 1 includes a heat transfer device 30 for transferring heat generated by non-contact power supply from a vehicle 10 having a small heat capacity to a stop station 20 having a large heat capacity. The heat transfer device 30 releases the heat generated on the vehicle 10 side during non-contact power feeding to the stop station 20 side and cools the vehicle 10 side. The heat transfer device 30 includes a flexible heat transfer member 32 that can tilt in a direction in which the vehicle 10 is movable.

  As described above, the flexible heat transfer member 32 has a certain degree of variation in the stop position of the vehicle 10, and therefore it cannot be expected that the power receiving coil 11 and the power feeding coil 21 are strictly facing each other. Therefore, the flexible heat transfer member 32 is flexibly tilted in the moving direction with respect to the vehicle 10 in a position where the power receiving coil 11 and the power feeding coil 21 are generally opposed to each other but are displaced, thereby causing the vehicle to move. The thermal connection between the station 10 and the stop station 20 is maintained. Thereby, the position shift with the vehicle 10 and the stop station 20 is accept | permitted, and without providing cooling devices, such as a fan, in the vehicle 10, high cooling capability can be obtained by heat conduction.

  The heat transfer device 30 of the present embodiment includes a heat transfer plate 31 provided around the power receiving coil 11, a flexible heat transfer member 32 that stands up around the power feeding coil 21 and contacts the heat transfer plate 31. Have. As a result, the vehicle 10 side can be cooled without blocking the electromagnetic field A formed between the power receiving coil 11 and the power feeding coil 21 during non-contact power feeding, and a decrease in power feeding efficiency is suppressed. can do.

Further, by providing the heat transfer plate 31 around the power receiving coil 11, not only the heat of the power receiving coil 11 but also the heat of the power receiving circuit 12 and the storage battery 13 can be transmitted to the metal surface of the heat transfer plate 31 to be cooled. .
Further, the flexible heat transfer member 32 is electrically grounded, and can be grounded via the heat transfer plate 31 and the like of the power receiving circuit 12 when performing non-contact power feeding. Further, the flexible heat transfer member 32 functions as an electromagnetic shield wall, can prevent entry of foreign matters, etc., and can form a strong electromagnetic field A.

  The flexible heat transfer member 32 of this embodiment is implanted in a metal pipe 33 through which cooling water flows. Thereby, the heat transmitted from the vehicle 10 side to the stop station 20 on the ground side through the brush fibers of the flexible heat transfer member 32 can be removed by the cooling water. As shown in FIG. 2, the cooling water circulates in a spiral shape from the inner end of the metal pipe 33 adjacent to the power feeding coil 21 toward the outer end. Thereby, it becomes possible to take heat preferentially from the vicinity of the receiving coil 11 which exchanges high frequency electric power with the cooling water with low temperature.

As described above, according to the above-described embodiment, the contactless power feeding system 1 that performs the contactless power feeding between the vehicle 10 and the stop station 20 from the vehicle 10 having a small heat capacity to the stop station 20 having a large heat capacity. A configuration in which a heat transfer device 30 for transferring heat generated by non-contact power feeding is provided, and the heat transfer device 30 includes a flexible heat transfer member 32 that is tiltable in a movable direction of the vehicle 10. By adopting, a high cooling capacity can be obtained without allowing a displacement and allowing the vehicle 10 to be provided with a cooling device.
Therefore, in the present embodiment, when the vehicle 10 and the stop station 20 are in a relatively movable relationship, the contactless power that can appropriately dissipate the heat generated by the contactless power feeding without requiring time for positioning. A power feeding system 1 is obtained.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following description, the same or equivalent components as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.
FIG. 3 is an overall configuration diagram of the non-contact power feeding system 1 in the second embodiment of the present invention.
As shown in FIG. 3, the second embodiment differs from the above embodiment in that the flexible heat transfer member 32 includes a spring member 35.

The spring member 35 is erected substantially vertically upward from the stop station 20 side. The spring member 35 is configured to bias the metal pipe 33 through which the cooling water flows to the heat transfer plate 31.
Further, the spring member 35 has a base end fixed to the stop station 20 side, and a distal end that supports the metal pipe 33 is a free end. The spring member 35 is a free end of the vehicle 10 (in this embodiment, a plane along the road surface 2). Direction).

  According to 2nd Embodiment of the said structure, the metal pipe 33 can be pressed directly on the heat exchanger plate 31, and the heat | fever of the vehicle 10 side can be taken away. In addition, the flexible heat transfer member 32 can be tilted in the direction in which the vehicle 10 is movable by the action of the spring member 35, so that the positional deviation between the vehicle 10 and the stop station 20 is allowed, and positioning takes time. It is not necessary to remove the heat generated by the non-contact power feeding. Moreover, if the spring member 35 is formed of a metal material, the heat transfer plate 31 can be electrically grounded on the ground side.

  The spring member 35 may not only have a tiltable property, but may have a property that can be expanded and contracted in a direction perpendicular to the movable direction of the vehicle 10 instead of the tiltable property. For example, the spring member 35 may be configured to be maintained in a contracted state until the vehicle stops, and to extend when the vehicle stops. As the spring member 35 extends until the metal pipe 33 touches the heat transfer plate 31, the cooling water in the metal pipe 33 passes through the heat transfer plate 31 to the vehicle 10 (the power reception coil 11, the power reception circuit 12 or the storage battery 13). Can be cooled.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In the following description, the same or equivalent components as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.
FIG. 4 is a cross-sectional configuration diagram showing the flexible heat transfer member 32 in the third embodiment of the present invention.
As shown in FIG. 4, the third embodiment differs from the above embodiment in that the flexible heat transfer member 32 includes an expansion / contraction member 36 that contacts the heat transfer plate 31 by injecting cooling water.

  The expansion / contraction member 36 is a flexible resin material having a stretchable property made of an elastomer or the like provided on the stop station 20 side. The expansion / contraction direction is a direction perpendicular to the direction in which the vehicle 10 is movable. The expansion / contraction member 36 is a rod-like tube body with a closed end, and is connected to a cooling water injection device 37. The cooling water injection device (refrigerant injection device) 37 is connected to, for example, a water supply or the like, and can open and close a valve (not shown) to inject cooling water as a refrigerant into the expansion / contraction member 36 with a predetermined water pressure. It has become. The expansion / contraction member 36 is in a contracted state as indicated by a dotted line in FIG. 4 before the cooling water is injected. However, the expansion / contraction member 36 stands in a rod shape by the injection of the cooling water and comes into contact with the heat transfer plate 31. Yes.

Since the expansion / contraction member 36 has the property of being expandable / contractable even when the vehicle 10 is swung laterally due to the wind or the like and the heat transfer plate 31 is displaced, the contact state between the expansion / contraction member 36 and the heat transfer plate 31. The heat transfer plate 31 can be cooled by the refrigerant in the expansion / contraction member 36.
Further, since the expansion / contraction member 36 can cool the heat transfer plate 31 regardless of the position of the heat transfer plate 31, after the vehicle 10 stops, the refrigerant is injected into the expansion / contraction member 36 to expand / contract. By operating the member 36 so as to be in contact with the heat transfer plate 31, the expansion / contraction member 36 can be brought into contact with the heat transfer plate 31 and cooled even when the stop position of the vehicle 10 is shifted. In addition, since the expansion / contraction member 36 is made of a deformable material, the expansion / contraction member 36 may have not only a stretchable property but also a property that allows the vehicle 10 to tilt in a movable direction.

Also, the surface of the expansion / contraction member 36 is coated with aluminum, or a plurality of thin metal wires that do not hinder expansion / contraction are attached to the surface of the expansion / contraction member 36 in a mesh shape or in a direction from the surface in contact with the heat transfer plate 31 toward the ground. Therefore, when the expansion / contraction member 36 stands in a rod shape by the injection of cooling water and comes into contact with the heat transfer plate 31, it is possible to electrically ground the heat transfer plate 31 on the ground side through an aluminum coating or a metal wire. it can.
Furthermore, in order to contact the heat transfer plate 31 and remove the heat, the cooling water injected into the expansion / contraction member 36 is heated with time, and the cooling capacity is reduced, but the drainage valve (not shown) Cooling capacity can be maintained by discharging the cooling water heated by the operation from the expansion / contraction member 36 and injecting cold cooling water into the expansion / contraction member 36 again.

  According to the third embodiment having the above-described configuration, the heat on the vehicle 10 side can be taken away by pressing the expansion / contraction member 36 into which the cooling water is injected into the heat transfer plate 31. In addition, the flexible heat transfer member 32 can be tilted in the direction in which the vehicle 10 is movable by the action of the expansion / contraction member 36 into which the cooling water is injected, so that the positional deviation between the vehicle 10 and the stop station 20 is prevented. The heat generated by the non-contact power feeding can be removed without allowing time for positioning. Further, if the cooling water is removed from the expansion / contraction member 36, the vehicle 10 side is not rubbed because it is not in contact with the heat transfer plate 31 and the like.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. In the following description, the same or equivalent components as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.
FIG. 5 is a cross-sectional configuration diagram showing the flexible heat transfer member 32 in the fourth embodiment of the present invention.
As shown in FIG. 5, the fourth embodiment is different from the above-described embodiment in that the expansion / contraction member 36 is an arched tube body.

  The expansion / contraction member 36 in the fourth embodiment is a tube body in which one end and the other end are disposed on the road surface 2 with a predetermined distance therebetween, and is connected to a circulating cooling water injection device 38. The circulating cooling water injecting device 38 is connected to, for example, a water supply or the like, and forms a circulating flow of cooling water flowing from one end to the other end of the expansion / contraction member 36 by opening and closing a valve (not shown). ing. The expansion / contraction member 36 is in a contracted state as indicated by a dotted line in FIG. 5 before the cooling water is injected, but is configured to stand up in an arch shape and come into contact with the heat transfer plate 31 by the injection of the cooling water. ing.

  In addition, the surface of the expansion / contraction member 36 is coated with aluminum, or a plurality of thin metal wires that do not prevent expansion / contraction are attached to the surface of the expansion / contraction member 36 in a mesh shape or in a direction from the surface in contact with the heat transfer plate 31 toward the ground. Therefore, when the expansion / contraction member 36 stands in an arch shape by injecting cooling water and comes into contact with the heat transfer plate 31, the heat transfer plate 31 is electrically grounded on the ground side through an aluminum coating or a metal wire. Can do.

  According to the fourth embodiment having the above-described configuration, the heat on the vehicle 10 side can be taken away by pressing the expansion / contraction member 36 into which the cooling water is injected into the heat transfer plate 31. Moreover, according to the expansion / contraction member 36 in 4th Embodiment, since the internal cooling water circulates and replaces, the vehicle 10 side can be cooled over a long time. For this reason, even if the non-contact power supply is performed for a long time, for example, as in the third embodiment, the cooling water injection device 37 intermittently opens and closes the valve to switch between discharge and injection of the cooling water. There is no need to change the internal cooling water.

  In addition, the flexible heat transfer member 32 can be tilted in the direction in which the vehicle 10 is movable by the action of the expansion / contraction member 36 into which the cooling water is injected, so that the positional deviation between the vehicle 10 and the stop station 20 is prevented. The heat generated by the non-contact power feeding can be removed without allowing time for positioning. Further, if the cooling water is removed from the expansion / contraction member 36, the vehicle 10 side is not rubbed because it is not in contact with the heat transfer plate 31 and the like.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

In the above-described embodiment, the configuration in which the metal pipe 33 is spirally connected has been described. However, the configuration is not limited to this configuration. For example, as shown in FIG. Multiple metal pipes 33 may be arranged. For example, as shown in FIG. 7, a metal pipe 33 may be provided around the feeding coil 21 in a ladder shape.
For example, in the said embodiment, although cooling water was illustrated as a refrigerant | coolant which distribute | circulates the metal pipe 33 and the refrigerant | coolant injected into the expansion / contraction member 36, you may use liquids other than water.

  Further, for example, in the first to second embodiments, if the heat capacity on the ground side is large, the heat transmitted to the metal pipe 33 may be directly transferred to the ground without using the cooling water. In the case of the second embodiment, the spring member 35 is made of a material having high thermal conductivity such as metal. In this case, a metal plate may be used instead of the metal pipe 33, and a metal brush may be planted on the metal plate.

  Further, for example, in the above embodiment, the flexible heat transfer member 32 has been described as being in contact with the heat transfer plate 31, but the present invention is not limited to this configuration. For example, the body of the vehicle 10 may be used as the heat transfer plate 31. The heat transfer plate 31 may also function as the shield plate of the power receiving coil 11.

  When the heat transfer plate 31 has a shielding function as the shield plate, the heat transfer plate 31 needs to be formed of a nonmagnetic material having high thermal conductivity and electrical conductivity. A material that satisfies these three conditions is, for example, copper or aluminum. Further, it is not necessary to form the entire heat transfer plate 31 with a material that satisfies the above three conditions. For example, only the surface of the heat transfer plate 31 that faces the power receiving coil 11 covers the predetermined thickness. It may be made of a material that satisfies the requirements, or, in the surface facing the power receiving coil 11, only the three regions that are desired to be shielded by generating a magnetic field at the time of non-contact power feeding out of the vicinity of the power receiving coil 11 and the peripheral portions. You may form with the material which satisfy | fills conditions.

  Further, for example, when the vehicle 10 moves, in the first embodiment, the influence of the tilted flexible heat transfer member 32 on the power receiving coil 11 due to rubbing against the power receiving coil 11 is reduced. In order to reduce the influence on the power receiving coil 11 due to the metal pipe 33 urged upward by the contracted spring member 35 being rubbed against the power receiving coil 11, a heat transfer plate 31 having a depression as shown in FIG. The lower surface of the power receiving coil 11 may not protrude from the heat transfer plate 31. FIG. 8 shows an example applied to the second embodiment. A sealing material 39 is disposed around the power receiving coil 11 and the same surface as the lower surface of the heat transfer plate 31 is formed using a material that does not block the electromagnetic field A, such as an engineering plastic material, a resin material, or FRP (Fiber Reinforced Plastics). do it.

  For example, in the above-described embodiment, power is supplied from the stop station 20 on the ground side and power is supplied to the bottom of the vehicle 10, but the direction of power supply is not limited. For example, power may be supplied from the wall to the side portion, front portion, or rear portion of the vehicle 10, or the roof portion of the vehicle 10 may be supplied from the ceiling.

  Further, for example, in the above-described embodiment, the case where the power receiving device is the vehicle 10 and the power feeding device is the stop station 20 is illustrated. However, the present invention is not limited to this configuration, and for example, the power receiving device is the stop station 20 and the power feeding device is the vehicle. It may be 10. Further, the present invention can be applied even if at least one of the power receiving device and the power feeding device is a vehicle, or a moving body such as a ship, a submarine, or an aircraft.

  In addition, for example, the present invention is particularly effective when combined with a magnetic resonance type non-contact power supply that can tolerate a large misalignment. However, the non-contact power supply can be combined with other types of non-contact power supply such as an electromagnetic induction type. The heat generated by can be dissipated. The sizes, types, and shapes of the power receiving coil 11 and the power feeding coil 21 are arbitrary as long as non-contact power feeding is possible, and the power receiving coil 11 and the power feeding coil 21 may have different sizes, types, and shapes. The flexible heat transfer member 32 may be disposed at a position that does not interfere with non-contact power feeding, that is, a position that surrounds the power receiving coil 11 and the power feeding coil 21 with a distance that does not affect the electromagnetic field A.

Moreover, although the heat-transfer plate 31 of each said embodiment is a flat heat-transfer member which makes the main function the conduction (heat conduction) of the heat which generate | occur | produces in the receiving coil 11, this invention is not limited to this. The heat transfer member of the present invention is not limited to a flat plate shape. For example, a block-like member in which a large number of heat radiation fins (heat radiation ribs) are erected on a plate-like portion such as a heat sink or an aluminum foil. A thin member may be used. For example, when the heat transfer member of the present invention has a shape including heat radiation fins, the heat dissipation effect of heat generated in the power reception coil 11 can be enhanced, and therefore the cooling effect of the power reception coil 11 can be further enhanced. Become.
Further, for example, substitution and combination of the configurations of the above-described embodiments are possible as appropriate.

  Note that the power receiving coil 11 and the power feeding coil 21 in the present invention include not only a wire material and a core wound in a coil shape and a resonance capacitor, but also a winding frame and a holding frame for holding the wire material in a coil shape, a filler, For the receiving coil 11 and the feeding coil 21 to exert their functions mechanically, such as an electric wire for electrically connecting the resonance capacitor, a holding material for holding the resonance capacitor, and a case for protecting them. It also includes elements.

  DESCRIPTION OF SYMBOLS 1 ... Non-contact electric power feeding system, 10 ... Vehicle (power receiving device), 11 ... Power receiving coil, 20 ... Stop station (power feeding device), 21 ... Power feeding coil, 30 ... Heat transfer device, 31 ... Heat transfer plate (heat transfer member) 32 ... Flexible heat transfer member, 33 ... Metal pipe, 35 ... Spring member, 36 ... Expansion / contraction member

Claims (13)

A heat transfer device for transferring heat between a power supply device for non-contact power supply and a power reception device, at least one of which is movable,
At least one of the property of transferring the heat generated by the non-contact power supply from one of the power receiving device and the power feeding device to the other and being tiltable in the movable direction or the property of being stretchable in the direction perpendicular to the direction. A heat transfer device having a flexible heat transfer member. The power receiving device and the power feeding device each have a coil that performs the contactless power feeding,
A heat transfer member provided around one of the coils of the power receiving device and the power feeding device;
2. The flexible heat transfer member, which stands up around the other coil of the power receiving device and the power supply device, and is thermally coupled to the heat transfer member. The heat transfer device described in 1.   The heat transfer device according to claim 2, wherein the flexible heat transfer member is electrically grounded.   The heat transfer device according to claim 3, wherein the flexible heat transfer member includes a metal brush.   The heat transfer device according to claim 4, wherein the metal brush is implanted in a metal pipe through which a refrigerant flows.   The heat transfer device according to claim 2, wherein the flexible heat transfer member includes a spring member.   The heat transfer device according to claim 6, wherein the spring member urges a metal pipe through which a refrigerant flows to the heat transfer member.   4. The heat transfer device according to claim 2, wherein the flexible heat transfer member includes an expansion / contraction member that contacts the heat transfer member by injection of a refrigerant. 5.   The heat transfer device according to claim 8, wherein the expansion / contraction member includes at least one of a rod-shaped tube body and an arch-shaped tube body. One of the power receiving device and the power feeding device is a vehicle,
The heat transfer device according to any one of claims 1 to 9, wherein the other of the power reception device and the power supply device is a stop station where the vehicle stops.   The heat transfer device according to claim 2, wherein the heat transfer member has a shielding function.   A power feeding device that performs non-contact power feeding with a power receiving device, wherein the power feeding device includes a heat transfer device that transfers heat generated by the non-contact power feeding from one of the power receiving device and the power feeding device at least one of which is movable. And the said heat-transfer apparatus is a electric power feeder which has a flexible heat-transfer member which has at least one of the property which can be tilted to the said movable direction, or the property which can be expanded-contracted to the orthogonal | vertical direction of the said direction. A non-contact power feeding system that performs non-contact power feeding between a power receiving device and a power feeding device, at least one of which is movable,
A heat transfer device for transferring heat generated by the non-contact power supply from one to the other of the power receiving device and the power supply device;
The heat transfer device is a non-contact power supply system including a flexible heat transfer member having at least one of a property that can be tilted in the movable direction and a property that can be expanded and contracted in a direction perpendicular to the direction.

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