JP2012039831A - Insertion type non-contact electric power feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insertion type non-contact electric power feeding device which firstly, is improved in reliability and safety, secondly, is small and light weight and has excellent handleability, thirdly, has fewer heat generation, radiated noise and so on, and fourthly, is also excellent in heat dissipation.SOLUTION: In a non-contact electric power feeding device 1 of the present invention, a power receiving body 20 of a power receiving part 5 is provided with a pair of secondary coils 6, and both the secondary coils 6 are disposed facing each other via an insertion space S. A feeding body 21 of a feeding part 3 is provided with a primary coil 4, and when feeding, the feeding body 21 is inserted into the insertion space S of the power receiving body 20 from an insertion opening E, and the primary coil 4 positions correspondingly in proximity between the both secondary coils 6 in a substantially sandwich manner. Furthermore, the power receiving body 20 is provided with magnetic cores 25 such as ferrite cores, and the magnetic cores 25 are disposed outside the both secondary coils 6, respectively. In addition, in the feeding body 21 and the power receiving body 20, central space holes H are entirely formed.

Description

  The present invention relates to a plug-in type non-contact power feeding apparatus. That is, the present invention relates to a plug-in non-contact power supply device that charges a battery mounted on a light vehicle such as a motorcycle.

《Technical background》
A battery is mounted on the vehicle and supplies power to lamps, an ignition device, a starting device, and the like.
Recently, electric motorcycles, electric assist bicycles, and other light vehicles that supply electric power to a traveling motor with an installed battery are becoming popular. For example, the spread of such electric vehicles is being promoted with the recent approval of high-standard (double assist) electric assist bicycles and the enforcement of parking violations of ordinary vehicles in urban areas.
As the mounted battery is further discharged, it naturally becomes difficult to travel and the life of the battery is shortened. Therefore, the battery is appropriately charged using the charging device.

<Conventional technology>
By the way, charging of a battery mounted on a light vehicle such as a motorcycle of this type has been conventionally performed as follows.
That is, in many cases, a contact-type charging device is used, and charging is carried out by connecting a crocodile clip, a plug, or the like on the charging device side to a connector or outlet on the battery side.
On the other hand, there were some non-contact charging devices, but they did not reach full-scale use. In addition, as a non-contact type charging device, for example, those shown in the following Patent Documents 1, 2, and 3 can be cited, but these are not for charging the battery of this kind of vehicle, but for charging the vehicle battery. Application is difficult.

JP 2009-4514 A Japanese Patent Laid-Open No. 2001-167756 JP-A-60-132806

"problem"
By the way, although the battery charging by the conventional contact-type charging device described above is frequently used, the following problems have been pointed out.
First, with frequent plugging and unplugging, poor connector contact was likely to occur. In addition, since the connector is inserted and removed with force or tensile force, force is applied to the cable (lead wire) near the base of the connector, and disconnection is likely to occur. Such troubles have occurred frequently, and problems have been pointed out in reliability and safety.
In addition, there are places (for example, plugs) where the conductive portions are exposed to the outside, and it has been pointed out that poor insulation occurs due to the ingress of rainwater or car wash water, there is a risk of electric shock, and there are concerns about outdoor use. From this aspect, problems with reliability and safety were pointed out.
On the other hand, although the battery charging by the non-contact type charging device described above has been used in part, the following problems have been pointed out.
That is, it has been pointed out that the structure is complicated, the apparatus size is increased, the weight is heavy, the price is high, the handling is not easy, the damage when dropped is great, and so on.

<< About the present invention >>
In view of such a situation, the plug-in type non-contact power feeding device of the present invention has been made to solve the above-described problems of the prior art.
The present invention is firstly improved in reliability and safety, secondly small and light, excellent in handleability and the like, thirdly less heat generation and radiation noise, and fourthly heat dissipation. It aims at proposing the plug-in type non-contact electric power feeder excellent also in the property.

<About each claim>
The technical means of the present invention for solving such a problem is as follows, as described in the claims.
About Claim 1, it is as follows.
The plug-in type non-contact power feeding device according to claim 1 charges a battery mounted on the vehicle. That is, based on the mutual induction effect of electromagnetic induction, electric power can be supplied from the primary coil on the power feeding unit side to the secondary coil on the power receiving unit side mounted on the vehicle in a non-contact proximity position, and The battery can be charged.
The primary coil and the secondary coil have a flat flat structure wound in a spiral shape. The power reception unit main body includes the paired secondary coils, and both the secondary coils are arranged to face each other through the insertion space. The power feeding unit main body is provided with the primary coil, and is inserted into the insertion space of the power receiving unit main body at the time of power feeding, so that the primary coil is in a proximity corresponding position in a sandwich state between the secondary coils. It is characterized by doing.

About Claim 2, it is as follows.
In the plug-in type non-contact power feeding device according to claim 2, in contrast to claim 1, the power feeding unit main body includes a pair of primary coils, and both the primary coils are , Are arranged opposite to each other through an insertion space.
The power receiving unit main body is provided with a secondary coil, and is inserted into the insertion space of the power feeding unit main body at the time of power feeding, so that the secondary coil is close to each other in a sandwich state between the primary coils. It is characterized by being located.
About Claim 3, it is as follows.
According to a plug-in type non-contact power feeding device of a third aspect, the vehicle is a two-wheeled vehicle or other light vehicle according to the first aspect. The power receiving unit main body includes a magnetic core such as a ferrite core, and the magnetic core has a flat flat structure and is disposed outside the secondary coils. .
About Claim 4, it is as follows.
According to a fourth aspect of the present invention, the primary coil and the secondary coil are each annularly wound to form a central space. The magnetic core is also formed with a central space. The power supply unit main body and the power receiving unit main body are characterized in that a central space hole corresponding to the central space is formed as a whole.

About Claim 5, it is as follows.
In the plug-in type non-contact power feeding device according to claim 5, the communication device is attached according to claim 4. The communication device includes a primary coil antenna disposed in the central space of the primary coil and a secondary coil disposed in the central space of one of the secondary coils based on mutual induction of electromagnetic induction. A weak electromagnetic wave can be transmitted between the side coil antenna and the proximity corresponding position without contact.
Therefore, the communication apparatus has a position alignment detection function for determining whether or not the primary coil and the secondary coil of the non-contact power supply apparatus are close to each other in a positional relationship where power can be supplied. Accordingly, power is supplied from the primary coil to the secondary coil on condition that weak electromagnetic waves are transmitted between the primary coil antenna and the secondary coil antenna.
The secondary coil antenna of the communication device is characterized in that a dedicated magnetic core is disposed at least on the insertion port side into which the primary coil antenna is inserted.

About Claim 6, it is as follows.
According to a sixth aspect of the present invention, in the plug-in type non-contact power feeding device according to the third aspect, the main body of the power feeding section has a substantially paddle shape in which the primary coil is embedded in a resin case. Then, high frequency alternating current is supplied to the primary coil.
The power receiving unit main body has both the secondary coil and both the magnetic cores embedded in the resin case with the insertion space hole therebetween, and has a substantially housing shape. The high-frequency alternating current from the secondary coil is supplied to the battery.
About Claim 7, it is as follows.
In the plug-in type non-contact power feeding device according to claim 7, a configuration not according to claim 3 is possible.
That is, according to a third aspect of the present invention, the power receiving unit main body includes the paired secondary coils, and the magnetic cores are disposed outside the secondary coils. When the power supply is performed, the primary coil of the main body of the power supply unit that is inserted is positioned between the secondary coils in a proximity-corresponding state between both the secondary coils. Claim 7 has a configuration that does not depend on this.
That is, according to the seventh aspect, the power receiving unit main body includes one secondary coil, and a magnetic core is disposed on one side of the secondary coil. When feeding power, the primary coil of the power feeding unit main body is positioned close to the opposite side of the secondary coil, and a magnetic core is covered outside the primary coil.

<About the action>
Since the present invention comprises such means, the following is achieved.
(1) During power feeding, a power feeding unit body connected to an external power source is inserted into the power receiving unit body.
(2) Accordingly, the primary coil of the power feeding unit main body is positioned adjacent to the secondary coil of the power receiving unit main body in a sandwich state.
(3) The primary coil and the secondary coil are electromagnetically coupled, and electric power is supplied from the primary circuit on the power feeding unit side to the secondary circuit on the power receiving unit side based on the mutual induction action of electromagnetic induction, and the battery Is charged.
(4) When the charging of the battery is completed and the power feeding is completed, the power feeding unit main body is extracted from the power receiving unit main body.
(5) The present invention is as follows. First, since power feeding is started and terminated by insertion and extraction into the insertion space, there is no possibility of contact failure or disconnection.
(6) The primary coil and the secondary coil have a structure in which coil conductors are covered with insulation, and are embedded in a resin case, so that the waterproof surface is excellent.
(7) The primary coil, the secondary coil, the magnetic core and the like have a flat flat structure. In addition, a magnetic core is not used in the power feeding unit body. Therefore, the structure is simple, the size is reduced, and the weight is light.
(8) At the time of power feeding, the primary coil and the secondary coil are located close to each other in a well-balanced manner with a very small interval. The formed magnetic flux is shielded by the outer core cores. As a result, power supply loss and heat generation loss are small, and radiation noise is also reduced.
(9) A central space hole is formed in the power feeding unit main body and the power receiving unit main body, and natural heat dissipation is possible.
(10) Therefore, the plug-in type non-contact power feeding device of the present invention exhibits the following effects.

<< First effect >>
First, reliability and safety are improved. That is, in the plug-in type non-contact power feeding device of the present invention, when the power feeding unit main body is inserted into or removed from the power receiving unit main body, charging starts and ends without requiring any forceful operation. Is done.
This kind of conventional technology, that is, the conventional technology using a contact-type charging device, the occurrence of frequent disconnection of the cable (lead wire) due to insertion / removal of the connector and contact with the exposed contact. There is no risk of defects, and reliability and safety are improved.
The primary coil and the secondary coil are each coated with a coil conductor and are embedded in a resin case. In this way, both coils have a waterproof structure, which is superior to the above-mentioned conventional technology in terms of waterproofing, eliminating the risk of poor insulation and electric shock due to the ingress of rainwater and car wash water, and can be used outdoors. Is also suitable. From these aspects, reliability and safety are improved.

<< Second effect >>
Secondly, it is small and light and has excellent handling properties. That is, in the non-contact power feeding device of the present invention, a flat flat structure is adopted as the primary coil, the secondary coil, the magnetic core, etc., and the magnetic core is not used on the power feeding unit main body side. Compared with the seed prior art, that is, the prior art using the non-contact charging device, the structure is simple.
Therefore, the apparatus size is reduced, the weight is light, and the power feeding unit body provided with the central space hole is particularly easy to carry and handle. Although the power supply unit main body may be dropped by mistake, the damage at that time is small, it is hard to break, and the risk of damage is low.

《Third effect》
Third, there is little heat generation and radiation noise. That is, in the plug-in type non-contact power feeding device of the present invention, the primary coil and the secondary coil are positioned close to each other in a well-balanced manner with a very small interval during power feeding. Moreover, the magnetic flux formed between the primary coil and the secondary coil is guided and directed by the outer magnetic cores and shielded.
Accordingly, power supply loss, heat generation loss, radiation noise, electromagnetic interference and the like are greatly reduced.

<< 4th effect >>
Fourth, it has excellent heat dissipation. That is, in the plug-in type non-contact power feeding device of the present invention, the central space hole is formed in the power feeding unit main body and the power receiving unit main body. Therefore, even when heat is generated, natural heat is radiated in the central space hole, and the heat dissipation is excellent.
As described above, the effects exerted by the present invention are remarkably large, such as all the problems existing in this type of conventional example are solved.

The plug-in type non-contact power feeding apparatus according to the present invention will be described with reference to an embodiment for carrying out the invention. (1) FIG. 2 is an explanatory side view of the whole, and (2) FIG. FIG. For explanation of the embodiment for carrying out the invention, a primary coil, a secondary coil, a magnetic core, etc. are shown, (1) is a front sectional view, (2) is an exploded plan view, (3) The figure is a plan view, and (4) is a plan view with the upper magnetic core removed. It uses for description of the form for implementing this invention, and shows another example, (1) A figure is front sectional drawing of the usage example 1, (2) A figure is front sectional drawing of the usage example 2. . For explanation of the mode for carrying out the invention, a communication device is shown, (1) Figure is a plan view, (2) Figure is a front view, (3) Figure is a plan view of the main part, (4 The figure is a side view of the main part. It is used for description of a non-contact electric power feeder, and is plane explanatory views, such as a coil. It is a circuit diagram for description of the non-contact power feeding device.

Hereinafter, embodiments for carrying out the present invention will be described in detail.
<< About the non-contact electric power feeder 1 >>
First, the non-contact power feeding device 1 will be generally described with reference to FIGS.
The non-contact power feeding device 1 is used to charge the battery 2 mounted on the vehicle A, and receives power mounted on the vehicle A from the primary coil 4 on the power feeding unit 3 side based on the mutual induction action of electromagnetic induction. Electric power can be supplied to the secondary coil 6 on the side of the unit 5 in a contactless proximity position, and the battery 2 can be charged.
Such a non-contact power feeding apparatus 1 will be described in further detail in general.

First, the power feeding unit 3 of the non-contact power feeding device 1 will be described. In the primary circuit 7 of the power feeding unit 3, the alternating current from the external power supply 8 is supplied to the primary coil 4 through the cable 10 after passing through the high frequency power supply 9.
The power supply unit 3 will be described in more detail. The primary circuit 7 of the power supply unit 3 is connected to an outlet of an AC 100 V, 50 Hz or 60 Hz external power source (commercial power source) 8 in a house or room by a plug 11. (See also Fig. 1 (1)). The high-frequency power source 9 is composed of an inverter for frequency conversion, and energizes a high-frequency alternating current of, for example, several kHz to several tens kHz toward the primary coil 4 as a feeding alternating current and an exciting current.
In the primary circuit 7, 12 is a choke coil for frequency control, 13 is a capacitor for series resonance, and 14 is a capacitor for parallel resonance.
As shown in FIG. 5, the primary coil 4 has a substantially flat flat structure in a multiple turn manner. That is, the coil conductors with insulation coating are turned into a circular or rectangular spiral shape a plurality of times while maintaining a parallel positional relationship in parallel on the same plane, so that they are flat and flesh free of unevenness as a whole. It has a thin flat flat structure, and has an annular and substantially flange shape. In FIG. 5, 15 is a mold resin, 16 is a foam material, and 17 is a base plate.

Next, the power receiving unit 5 of the non-contact power feeding device 1 will be described. In the secondary circuit 18 of the power reception unit 5, high-frequency alternating current from the secondary coil 6 is converted to direct current and supplied to the battery 2.
Such a power receiving unit 5 will be further described in detail. First, non-contact power feeding by the magnetic field coupling method will be described. As described above, high-frequency alternating current is supplied and applied to the primary coil 4 as power supply alternating current and excitation current when power is supplied. Then, a magnetic field is generated around the coil conductor of the primary coil 4, and a magnetic flux is formed in a direction perpendicular to the coil surface.
And the magnetic flux formed in this way penetrates the secondary coil 6 of the power receiving unit 5 and is linked, thereby generating an induced electromotive force and forming a magnetic field. Electric power is transmitted and received using the magnetic field induced in this way. In the non-contact power feeding device 1, a magnetic path of magnetic flux is formed between the primary coil 4 and the secondary coil 6 based on such mutual induction action of electromagnetic induction, and the primary coil 4 and the secondary coil 6 are connected to each other. Electromagnetic coupling is performed, so that non-contact power feeding is performed.

The power receiving unit 5 including the secondary coil 6 is disposed in the vehicle A and charges the battery 2 mounted on the vehicle A.
The vehicle A to which the present invention is applied is typically an electric assisted bicycle, an electric vehicle, an electric motorcycle, an electric wheelchair, and other electric vehicles. Application to various light vehicles such as two-wheeled vehicles, three-wheeled vehicles, and four-wheeled vehicles that can be driven is possible. Of course, the present invention can be applied to the battery 2 for use in supplying electric power to lamps, an ignition device, a starting device, and the like.
Regarding the secondary circuit 18, reference numeral 19 in FIG. 6 denotes a capacitor for parallel resonance. The shape, size, and other configurations of the secondary coil 6 are the same as those described above with respect to the primary coil 4, and have shapes, sizes, and other configurations commensurate with the primary coil 4.
About the non-contact electric power feeder 1, the general description is as above.

<< Outline of the Invention >>
The plug-in contactless power supply device 1 of the present invention will be described below with reference to FIGS. First, the outline of the present invention is as follows.
In the non-contact power feeding device 1 of the present invention, the power receiving unit main body 20 of the power receiving unit 5 includes a pair of secondary coils 6, and both the secondary coils 6 are arranged opposite to each other via the insertion space S. ing.
Further, the power feeding unit main body 21 of the power feeding unit 3 includes the primary coil 4, and when power is fed, the primary coil 4 is inserted into the insertion space S of the power receiving unit main body 20 from the insertion port E. Between the secondary coils 6, they are positioned adjacent to each other in a sandwich state.
The outline of the present invention is as described above. Hereinafter, the present invention will be described in detail.

<< About the power feeding part 3 >>
First, the power feeding unit 3 of the contactless power feeding device 1 of the present invention will be described. As described above and as shown in FIG. 1 (1), in the primary circuit 7 of the power feeding unit 3, the alternating current from the external power source 8 passes through the high frequency power source 9, and then feeds high frequency alternating current and excitation. As a current, the cable 10 is energized and applied to the primary coil 4 of the power feeding unit main body 21.
As shown in FIG. 1 (2), the power feeding unit main body 21 is formed by covering a rectangular flat annular primary coil 4 with a resin case 22 (mold resin 15 in FIG. 5). It has a paddle shape (flat operation plate shape).
That is, the illustrated power feeding unit main body 21 has a horizontally long rectangular portion in which one set of the primary coil 4 is embedded and embedded in the resin case 22, and the tip of the cable 10 is embedded in the resin case 22 and is gripped by hand. And a vertically long rectangular portion. The resin case 22 is made of, for example, rubber (synthetic rubber, natural rubber) or other resin.
In FIG. 1A, reference numeral 23 denotes a power supply stand, which is erected on the ground, floor, or the like, for example, has a built-in high-frequency power source 9 or the like, and is provided with a lamp 24. The lamp 24 is used not only for night illumination but also for charging step display at each stage.
About the electric power feeding part 3, it is as above.

<About the power receiving unit 5>
Next, the power receiving unit 5 of the contactless power supply device 1 of the present invention will be described. As described above and as shown in FIG. 1A, in the secondary circuit 18 of the power receiving unit 5 disposed in the vehicle A, high-frequency alternating current from the secondary coil 6 is applied to the battery 2. Supplied.
In the illustrated example, an electrically assisted bicycle is shown as this type of vehicle A. And the battery 2 is arrange | positioned in the saddle lower part, and the power receiving part main body 20 provided with the secondary coil 6 is arrange | positioned in the lower space of a rear loading platform. The secondary circuit 18 is also provided with a converter (not shown) that performs direct current or constant voltage supply for supplying charging power to the battery 2.
In the power receiving unit main body 20, as shown in FIG. 2 (1), the rectangular flat annular secondary coil 6 that is divided into two and forms a pair is disposed oppositely through the insertion space S. The magnetic cores 25 are respectively arranged outside the secondary coils 6.
In other words, the flat core magnetic cores 25 having the same flat structure are disposed outside the two flat coils 6 having the flat structure disposed through the insertion space S, respectively. A ferrite core is typically used as the magnetic core 25, but other ferromagnetic materials can also be used.
Each figure of FIG. 2 is used for description of the secondary coil 6, the magnetic core 25, and the inserted primary coil 4. (1) is a front sectional view showing the mutual relationship, (2) is an exploded plan view showing this in an exploded manner, (3) is a plan view seen from the upper magnetic core 25 side, 4) The figure is a plan view of the state where the upper magnetic core 25 is removed.

As shown in FIG. 1 (2), the power receiving unit main body 20 includes the resin case 26 (FIG. 5) in which both the secondary coils 6 and the magnetic cores 25 have the insertion space S. In the mold resin 15). The resin case 26 is made of, for example, rubber (synthetic rubber, natural rubber) or other resin.
That is, the power receiving unit main body 20 shown in the figure includes an upper part in which a pair of the upper magnetic core 25 and the secondary coil 6 is embedded and embedded, and a lower part in which a pair of the lower secondary coil 6 and the magnetic core 25 is embedded and embedded. However, it consists of the structure arranged through the insertion space S. Accordingly, the power receiving unit main body 20 has a horizontally-long rectangular hollow housing case shape including an insertion space S that is a hollow internal space with an insertion port E.
And the insertion space S consists of a space which is sufficient for the horizontal rectangular part of the electric power feeding part main body 21 mentioned above to be inserted from the insertion port E along a longitudinal direction in the case of electric power feeding. That is, the feeder main body 21 including the primary coil 4 is formed of a hollow internal space that can be inserted and inserted between the secondary coils 6 in a sandwich state.

When the power feeding unit main body 21 is inserted into the insertion space S of the power receiving unit main body 20 during power feeding, both the secondary coils 6 on the power receiving unit main body 20 side and the primary coil on the power feeding unit main body 21 side are provided. 4 is a proximity-corresponding position in a non-contact manner through a slight gap G of about several mm to several tens of mm, for example, about 10 mm.
The gap G is formed as an air gap that is an air space gap, and / or the thickness of the resin case 26 on the power receiving unit main body 20 side, or the resin case 22 of the power supply unit main body 21. In some cases, it is formed as a thick wall, and it is used to include both cases. In the latter case, the power receiving unit main body 20 and the power feeding unit main body 21 are in physical contact but are not in electrical contact.
The magnetic core 25 functions to induce and direct the magnetic flux formed in the primary coil 4 and the secondary coil 6 during power feeding. Therefore, the electromagnetic shielding function is exhibited, and the leakage magnetic field to the surroundings and the radiation nozzle are reduced. In order to reinforce this, a metallic conductive material is mixed in the resin case 26 forming the power receiving unit body 20. It is good to keep.
The power receiving unit 5 is as described above.

<< About the central space hole H >>
Next, the central space hole H will be described with reference to FIG. 1 (2), FIG. 2 (2), FIG.
Primary coil 4 and the secondary coil 6 is respectively wound on the annular central space H ₁ formed magnetic core core 25 also, the central space H ₂ is formed.
The power supply unit main body 21 and the power receiving unit main body 20 are generally formed with a central space hole H that communicates with the central spaces H ₁ and H ₂ .

Such a central space hole H will be further described in detail. First, the primary coil 4 and the secondary coil 6 shown is wound in a rectangular flat annular commensurate, and a central space H ₁ rectangle in the center with. Core core 25 is also formed in a rectangular ring, with the middle, a little central space of H ₂ narrow th rectangular than the central space H _1.
In addition, the feeding portion main body 21 formed of the resin case 22 while incorporating the primary coil 4 as described above is formed with a slightly narrow central space hole H that communicates with the central space H ₁ of the primary coil 4. Has been. The power receiving unit main body 20 formed of the resin case 26 while incorporating the secondary coil 6 and the magnetic core 25 is also slightly narrow and communicates with the central space H _{1 of the} secondary coil and the central space H ₂ of the magnetic core 25. The central space hole H is formed.
The central space hole H formed in the power feeding unit main body 21 and the central space hole H formed in the power receiving unit main body 20 have the same shape and size, and when the power feeding unit main body 21 is inserted during power feeding, It consists of positioning that overlaps and communicates.
Incidentally, in the drawing, the aforementioned insertion space S consists of a horizontal hole and a blind hole provided with the insertion port E, whereas this central space hole H consists of a vertical hole and a through hole.
Although the central space hole H in the illustrated example is formed by one hole, it may be formed by a plurality of smaller holes regardless of this. Further, it is of course possible not to form the central space hole H irrespective of the illustrated example. Furthermore, an example in which the central space hole H is formed only in the power receiving unit main body 20 and not formed in the power feeding unit main body 21 is also conceivable.
The central space hole H is as described above.

《Action etc.》
The plug-in contactless power supply device 1 of the present invention is configured as described above. Therefore, it becomes as follows.
(1) In this non-contact power feeding device 1, during power feeding, the power feeding unit main body 21 of the power feeding unit 3 is inserted into the insertion space S of the power receiving unit main body 20 of the power receiving unit 5 from the insertion port E (FIG. 1). See). The power feeding unit 3 is connected to the external power supply 8 by a plug 11 in advance.

  (2) By such insertion, the primary coil 4 of the power feeding unit main body 21 is positioned adjacent to the secondary coil 6 of the power receiving unit main body 20 in a sandwich state. In a state of being inserted between the paired secondary coils 6 and sandwiched through a slight gap G, they are positioned in close proximity without contact (see FIG. 2 (1)).

(3) Thus, power feeding and charging of the battery 2 are performed. That is, the primary coil 4 of the power feeding unit main body 21 and the secondary coil 6 of the power receiving unit main body 20 are electromagnetically coupled, and the magnetic flux formed by the primary coil 4 passes through the secondary coil 6, so that 2 An induced electromotive force is generated in the next coil 6.
Electric power is supplied from the primary circuit 7 on the power feeding unit 3 side to the secondary circuit 18 on the power receiving unit 5 side mounted on the vehicle A based on the mutual induction action of electromagnetic induction, so that the in-vehicle battery 2 Is started (see FIG. 1 (1) and FIG. 6).

  (4) When the voltage of the battery 2 rises to a predetermined voltage and reaches full charge and charging is completed, the power feeding by the non-contact power feeding device 1 is finished. And the electric power feeding part main body 21 is extracted from the power receiving part main body 20, and is removed (refer FIG. 1).

(5) Then, according to the plug-in type non-contact power feeding device 1 according to the present invention, the following points are obtained.
First, in the non-contact power feeding device 1 of the present invention, power feeding is started by inserting the power feeding unit main body 21 into the insertion space S of the power receiving unit main body 20. When the power feeding is completed, the power feeding unit main body 21 is extracted from the insertion space S of the power receiving unit main body 20 (see FIG. 1).
In this way, when inserting and removing from the insertion space S, almost no work with force due to pressing force or tensile force is required, there is no risk of disconnection due to insertion and removal, and contact by exposed contacts. The battery 2 is charged without any risk of failure.

(6) Moreover, in the non-contact electric power feeder 1 of this invention, the primary coil 4 and the secondary coil 6 consist of the structure by which the coil conducting wire was insulation-coated. Moreover, the primary coil 4 and the secondary coil 6 are covered and embedded in the resin case 22 and the resin case 26 (see FIG. 1).
Thus, the primary coil 4 and the secondary coil 6 and the non-contact power feeding device 1 have no exposed portions of the conductive portions and are excellent in waterproof surfaces.

(7) Moreover, in the non-contact electric power feeder 1 of this invention, while using the thing of a flat flat structure as the primary coil 4 or the secondary coil 6, magnetic cores 25, such as a ferrite core, are also flat flat structures. (See FIG. 2 (1) and FIG. 5).
In addition, the magnetic core is not used in the power feeding unit main body 21 on the power feeding unit 3 side. That is, since the primary coil 4 is inserted inside the secondary coil 6 provided with the magnetic cores 25 on both outer sides (see FIG. 2 (1)), the primary coil 4 side has a magnetic flux. A magnetic core for guiding, directing and shielding is unnecessary.
As a result, the power feeding unit main body 21 and the power receiving unit main body 20, particularly the power feeding unit main body 21 of the non-contact power feeding device 1 have a simple structure, are downsized, and are light in weight (mass).

(8) Further, in the non-contact power feeding device 1 of the present invention, the primary coil 4 is sandwiched between the secondary coil 6 with the magnetic core 25 in a sandwich state and is in a proximity-corresponding position during power feeding (FIG. 2). (See Figure (1)). That is, in the non-contact power feeding device 1, there is no need to widen the gap G between the primary coil 4 and the secondary coil 6 unlike a general non-contact power feeding device using an electromagnetic coupling method.
Therefore, at the time of power feeding, the primary coil 4 and the secondary coil 6 are opposed to each other with a very small gap G, and are located close to each other with a good balance. Moreover, the magnetic flux formed between the primary coil 4 and the secondary coil 6 is reliably guided and directed and shielded by the magnetic cores 25 positioned outside the secondary coils 6 respectively.
Therefore, between the primary coil 4 on the power feeding unit main body 21 side and the secondary coil 6 on the power receiving unit main body 20 side, power feeding loss and heat generation loss (Joule heat loss due to loop circulating current, etc.) are small, and power feeding efficiency is excellent. . In addition, the electromagnetic shielding effect is reliable, and radiation noise and electromagnetic interference to the surroundings due to high-frequency electromagnetic waves radiated from the outside are reduced.

(9) Further, in the non-contact power feeding device 1, the central space hole H is formed in the power feeding unit main body 21 and the power receiving unit main body 20.
In the non-contact power feeding device 1, as described above, heat generation in the power feeding unit main body 21 and the power receiving unit main body 20 is relatively small, but when there is heat generation, in the central space hole H, for example, 3 degrees to 4 degrees. Natural heat dissipation to a degree is possible.
As for the action, it is as above.

<< Development of the present invention >>
By the way, about the plug-in type non-contact electric power feeder 1 of this invention, the structure of the following 1st, 2nd, 3rd, 4th, etc. is considered further.
First, the coil conductor is as follows.
About the coil conducting wire of the primary coil 4 and the secondary coil 6, the structure wound by making a rough winding, leaving a space | interval between wires is considered. As described above, when the coil conductor is roughly wound and a gap is provided between the wound coil conductors, there is no gap between the wires and the coil conductor is closely wound. As a result, the frequency characteristics are improved and the high-frequency AC resistance is reduced.

That is, although the insulation coating is applied, when the coil conductor is wound closely, the adjacent coil conductors adversely affect the characteristics, whereas when there is a gap between the coils, Like the litz wire, the skin effect is reduced. Current concentration due to the skin effect is dispersed, high-frequency AC resistance is reduced, Joule heat loss is reduced, and power loss is reduced.
That is, even when a general rectangular wire is used as the coil conductors of the primary coil 4 and the secondary coil 6, an effect equivalent to that when a litz wire is used can be obtained. Even in the case of a high frequency of 10 kHz or more, even if a normal rectangular wire is used without using an expensive litz wire, substantially the same effect can be obtained.
Incidentally, the primary coil 4 in the illustrated example has a coil conductor wound around 19 turns. The secondary coil 6 is wound with the same number of turns as that of the primary coil 4 in the case of the upper and lower parallel connection, and is wound with the half number of turns in the case of the upper and lower series connection.
The coil conductor is as described above.

Secondly, unlike the secondary coil 6 of the illustrated example, the configuration with one secondary coil 6 ′ is as follows.
That is, the power receiving unit main body 20 of the example shown in FIGS. 1 and 2 described above includes two secondary coils 6 that make a pair, and a magnetic core 25 is disposed outside each of the secondary coils 6. It had been. When the power is fed, the primary coil 4 of the power feeding unit main body 21 inserted is in a proximity-corresponding position between both the secondary coils 6 in a sandwich state.
However, a configuration in which the number of secondary coils 6 'is one is considered as follows, regardless of such a configuration.
That is, as shown in FIG. 3 (1), the power receiving unit body 20 ′ includes one secondary coil 6 ′, and a magnetic core 25 ′ is disposed on one side of the secondary coil 6 ′. It is installed. During power feeding, the primary coil 4 'of the power feeding unit main body 21' is positioned on the opposite side of the secondary coil 6 'from the magnetic core 25', and a dedicated coil is provided outside the primary coil 4 '. A configuration in which the magnetic core 27 is covered is conceivable.
In the drawing of FIG. 3 (1), one magnetic core 25 ′ is disposed below one secondary coil 6 ′, and this one secondary coil 6 is supplied during power feeding. One primary coil 4 ′ of the power feeding unit main body 21 ′ is placed on the upper side of “,” and one magnetic core 27 is put on the upper side of the primary coil 4 ′.
Since the other configurations, functions, operations, effects, and the like of the contactless power supply device 1 ′ shown in FIG. 3A are the same as those of the contactless power supply device 1 shown in FIGS. The description is omitted.

Further, in the non-contact power feeding device 1 ′ shown in FIG. 3 (1), the power feeding unit main body 21 ′ having the primary coil 4 ′ can be obtained by removing the magnetic core 27 placed on the upper side. As such, the non-contact power feeding device 1 shown in FIGS. 1 and 2 and the like can be used.
That is, as shown in FIG. 3 (2), the power feeding unit body 21 ′ used in the non-contact power feeding device 1 ′ shown in FIG. The power supply device 1 can be used as it is instead of the power supply unit main body 21.
The configuration with one secondary coil 6 ′ is as described above.

3rdly, contrary to the example of illustration, it is as follows about the structure which provides the insertion space S in the electric power feeding part main body 21 side.
That is, contrary to the example illustrated in FIGS. 1 and 2 described above, the power feeding unit main body 21 includes two primary coils 4 that make a pair, and both the primary coils 4 are inserted into the insertion space S. It is also possible to adopt a configuration in which the two are arranged opposite to each other.
In this case, the power receiving unit main body 20 includes one secondary coil 6, and is inserted into the insertion space S of the power feeding unit main body 21 from the insertion port E (in practice, the secondary coil 6). 6 and the primary coil 4 having the insertion space S are externally fitted), so that the secondary coil 6 is positioned between the primary coils 4 so as to be adjacent to each other in a sandwich state. To do.
In the non-contact power feeding device 1 (not shown) configured as described above, the power feeding unit main body 21 includes a pair of primary coils 4 and magnetic cores 25 respectively disposed on the outside thereof. Compared with the non-contact power feeding device 1 in FIG. 2, the weight of the power feeding unit main body 21 is heavy. However, the power receiving unit main body 20 mounted on the vehicle A is lightweight. Other configurations, functions, operations, effects, and the like other than these points are the same as those of the non-contact power feeding device 1 of the illustrated example shown in FIGS.
About the structure which provides the insertion space S in the electric power feeding part main body 21 side, it is as above.

Fourthly, the communication device 28 is as follows.
As shown in FIG. 4, a communication device 28 is attached to the non-contact power feeding device 1. The communication device 28 on the basis of the mutual induction effect of electromagnetic induction, power supply unit and the primary coil antenna 29 disposed in the central space H ₁ of the primary coil 4 of the main body 21, 2 of one of the power receiving portion body 20 between the central space H 2 primary coil antenna 30 disposed on _one of the following coil 6, while near the corresponding position in a non-contact, and can transmit the weak electromagnetic waves.
Therefore, in this communication device 28, the primary coil 4 of the power feeding unit main body 21 of the non-contact power feeding device 1 inserted during power feeding and the secondary coil 6 of the power receiving unit main body 20 are close to each other in a positional relationship where power can be fed. An alignment detection function for determining whether or not the corresponding position is present is provided. That is, on the condition that the predetermined weak electromagnetic wave transmission between the primary side coil antenna 29 and the secondary side coil antenna 30 is performed, the primary circuit 7 and the primary coil 4 of the power feeding unit 3 to the secondary circuit 18 of the power receiving unit 5 and Power is supplied to the secondary coil 6.

That is, the communication device 28 includes a primary side coil antenna 29 and a secondary side coil antenna 30 that are used together with the non-contact power feeding device 1 and are positioned to face each other during communication. And it is possible to transmit weak electromagnetic waves from the secondary coil antenna 30 to the primary coil antenna 29 based on the mutual induction effect of electromagnetic induction by magnetic flux formation (for the mutual induction effect of electromagnetic induction, The same applies to the non-contact power feeding device 1 (see also FIG. 6).
The primary coil antenna 29 is disposed in the central space H ₁ of the primary coil 4 and the central space hole H of the power feeding unit main body 21. The secondary coil antenna 30 is disposed in the central space H ₂ and the central space hole H of one secondary coil 6 of the power receiving unit main body 20.
Therefore, when feeding, when the primary coil 4 and the secondary coil 6 of the non-contact power feeding device 1 are located close to each other via the gap G, the primary side coil antenna 29 and the secondary side coil antenna 30 of the communication device 28 are arranged. However, it is positioned so as to be close to each other via the gap G, so that, for example, a weak electromagnetic wave of about several MHz can be transmitted.
Therefore, the communication device 28 exhibits the alignment detection and confirmation function of the non-contact power feeding device 1. When weak electromagnetic waves are transmitted by the communication device 28, it is determined that the primary coil 4 and the secondary coil 6 of the non-contact power feeding device 1 are in a positional relationship where power can be fed.
Accordingly, when a weak electromagnetic wave is transmitted, energization is turned on from the communication device 28 side to the high frequency power supply 9 of the non-contact power feeding device 1 based on voltage and current detection in the circuit on the primary side coil antenna 29 side of the communication device 28. A signal is sent and power feeding is started.

By the way, in such a communication apparatus 28, the secondary side coil antenna 30 is provided with a dedicated magnetic core 31 at least on the insertion port E side into which the primary side coil antenna 29 is inserted. .
That is, the communication device 28 exhibits the alignment detection and confirmation function of the non-contact power feeding device 1 as described above. However, if the configuration shown in FIG. 4A is used as it is, weak electromagnetic waves can be transmitted even at a long distance distance between the primary coil antenna 29 and the secondary coil antenna 30 separated by, for example, about 30 mm to 40 mm. It will be. That is, the weak electromagnetic wave is not transmitted even when the primary coil 4 and the secondary coil 6 on the non-contact power feeding device 1 side are not yet positioned to correspond to each other and power feeding is not possible. There is a risk that the alignment detection and confirmation function of the system will be uncertain.
Therefore, as shown in FIGS. 4 (3) and 4 (4), for the secondary coil antenna 30, a dedicated magnetic core 31 is disposed on the side where the primary coil antenna 29 is inserted. If the configuration is used, weak electromagnetic waves can be transmitted only when the distance between the two approaches 5 mm to 6 mm. That is, weak electromagnetic waves are transmitted as expected only after the primary coil 4 and the secondary coil 6 of the non-contact power feeding device 1 are positioned close to each other so as to be able to feed power.
Therefore, the alignment detection and confirmation function of the communication device 28 is ensured, and the alignment accuracy of the communication device 28 is greatly improved.
The illustrated magnetic core 31 is substantially U-shaped in a plane and has a configuration surrounding the secondary coil antenna 30, but is configured to be disposed at least on the insertion side of the primary coil antenna 29. I need it.
The communication device 28 is as described above.

DESCRIPTION OF SYMBOLS 1 Non-contact electric power feeder 1 'Non-contact electric power feeder 2 Battery 3 Electric power feeding part 4 Primary coil 4' Primary coil 5 Power receiving part 6 Secondary coil 6 'Secondary coil 7 Primary circuit 8 External power supply 9 High frequency power supply 10 Cable 11 Plug 12 Choke coil 13 Capacitor 14 Capacitor 15 Mold resin 16 Foam material 17 Base plate 18 Secondary circuit 19 Capacitor 20 Power receiving unit main body 20 'Power receiving unit main body 21 Power feeding unit main body 21' Power feeding unit main body 22 Resin case 23 Power feeding stand 24 Lamp 25 Magnetic core Core 25 'Magnetic core 26 Resin case 27 Magnetic core 28 Communication device 29 Primary side coil antenna 30 Secondary side coil antenna 31 Magnetic core A Vehicle E Insert G G Gap H Central space hole H ₁ Central space H ₂ Central space S Plug-in space

Claims (7)

A plug-in non-contact power feeding device for charging a battery mounted on a vehicle, based on a mutual induction effect of electromagnetic induction, from a primary coil on a power feeding unit side to a power receiving unit side 2 mounted on the vehicle. Power can be supplied to the next coil in a contactless proximity position, and the battery can be charged.
The primary coil and the secondary coil have a flat flat structure wound in a spiral shape, and the power receiving unit body includes the paired secondary coils, and both the secondary coils are inserted. It is arranged oppositely through the space,
The power feeding unit main body is provided with the primary coil, and is inserted into the insertion space of the power receiving unit main body at the time of power feeding, so that the primary coil is in a proximity corresponding position in a sandwich state between the secondary coils. A plug-in type non-contact power feeding device. In claim 1, contrary to claim 1, the power feeding unit main body includes a pair of primary coils, and both the primary coils are arranged opposite to each other via an insertion space,
The power receiving unit main body includes a secondary coil, and is inserted into the insertion space of the power feeding unit main body when power is supplied, so that the secondary coil is sandwiched between the primary coils in a proximity-corresponding position. A plug-in type non-contact power feeding device. In claim 1, the vehicle comprises a two-wheeled vehicle or other light vehicle,
The power receiving unit main body includes a magnetic core such as a ferrite core, and the magnetic core has a flat flat structure and is disposed outside the secondary coils. Built-in contactless power supply device. In Claim 3, each of the primary coil and the secondary coil is annularly wound to form a central space, and the magnetic core is also formed with a central space.
The plug-type non-contact power feeding device, wherein the power feeding unit main body and the power receiving unit main body are formed with a central space hole corresponding to the central space as a whole. In Claim 4, the communication apparatus is attached,
The communication device includes a primary coil antenna disposed in a central space of the primary coil and a secondary side disposed in a central space of one of the secondary coils based on mutual induction of electromagnetic induction. It is possible to transmit weak electromagnetic waves while being in close contact with the coil antenna,
Therefore, the communication device has a function of detecting whether or not the primary coil and the secondary coil of the non-contact power feeding device are close to each other in a positional relationship where power can be fed. Power supply from the primary coil to the secondary coil is performed on condition that weak electromagnetic waves are transmitted between the antenna and the secondary coil antenna.
The secondary coil antenna of the communication device has a dedicated magnetic core disposed at least on the insertion port side into which the primary coil antenna is inserted. Non-contact power feeding device. The power feeding unit main body according to claim 3, wherein the primary coil is embedded in a resin case, has a substantially paddle shape, and high-frequency alternating current is supplied to the primary coil.
The power receiving unit main body has both the secondary coil and both magnetic cores embedded in the resin case with the insertion space hole therebetween, thereby forming a substantially housing shape, and from the secondary coil. A plug-in non-contact power feeding device, wherein high-frequency alternating current is supplied to the battery. In claim 3, in claim 3, the power receiving unit main body includes the paired secondary coils, and the magnetic cores are respectively disposed on the outer sides of the secondary coils. The primary coil of the power feeding unit body that was inserted was in a proximity-corresponding position in a substantially sandwich state between the secondary coils,
The power receiving unit main body includes one secondary coil, and a magnetic core is disposed on one side of the secondary coil. When power is supplied, the primary coil of the power feeding unit main body is connected to the secondary coil. A plug-in non-contact power feeding device, wherein the plug-type non-contact power feeding device is located adjacent to the opposite side and has a magnetic core placed outside the primary coil.

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