WO2020044450A1

WO2020044450A1 - Resonator device

Info

Publication number: WO2020044450A1
Application number: PCT/JP2018/031891
Authority: WO
Inventors: 高橋　豊英
Original assignee: 新電元工業株式会社
Priority date: 2018-08-29
Filing date: 2018-08-29
Publication date: 2020-03-05
Also published as: JP7175988B2; JPWO2020044450A1

Abstract

Provided is a resonator device used to wirelessly charge a battery which is mounted on an electric vehicle and is for driving the electric vehicle, the resonator device being a device that is for receiving power and mounted on the electric vehicle, or a device that is for transmitting power and installed on the ground. The resonator device comprises: a coil having one end section connected to a first coil terminal and the other end section connected to a second coil terminal; a coil case for storing the coil in a spiral shape in a storing groove, wherein the storing groove is formed so as to be wound around the central section of a lower surface of the coil case, a first terminal arrangement region for storing the first coil terminal is formed on one end section positioned at the most central section of the wound storing groove, and a second terminal arrangement region for storing the second coil terminal is formed on the other end section positioned on the outermost side of the wound storing groove; a ferrite core arranged so as to be adjacent to the lower surface of the coil case; and a control substrate provided with a first control terminal to which the first coil terminal is electrically connected and a second control terminal to which the second coil terminal is electrically connected.

Description

Resonator device

The present invention relates to a resonator device.

Conventionally, a VA (Vehicle Assembly) resonator device is known as a power receiving antenna mounted on a vehicle side for use in non-contact charging of an electric vehicle (for example, see Japanese Patent Application Laid-Open No. 2018-29096).

従来 Such a conventional resonator device includes, for example, a coil, a shield member for shielding an electromagnetic field, a ferrite plate located between the coil and the shield member, and a housing for housing the shield member and the coil.

However, in this conventional resonator device, no effective proposal has been made to reduce a decrease in the performance of the resonator due to the extra processing when winding the coil.

Accordingly, it is an object of the present invention to provide a resonator device capable of reducing a decrease in the performance of a resonator due to extra length processing when winding a coil in a coil case.

The resonator device according to the embodiment according to one aspect of the present invention includes:
A resonator mounted on an electric vehicle and used for wireless charging of a battery for driving the electric vehicle, for power reception or power transmission mounted on the electric vehicle, a resonator device,
A coil having one end connected to the first coil terminal and the other end connected to the second coil terminal;
A storage groove is formed so as to surround the center of the lower surface and is wound, and a first terminal arrangement area for storing the first coil terminal is provided at one end located closest to the center of the wound storage groove. Is formed, and a second terminal arrangement area for accommodating the second coil terminal is formed at the other end located on the outermost side of the storage groove where the bill is wound, and the coil is spirally stored in the storage groove. Coil case,
A ferrite core arranged to be adjacent to the lower surface of the coil case,
A control board provided with a first control terminal to which the first coil terminal is electrically connected and a second control terminal to which the second coil terminal is electrically connected;
With
The coil case,
In order to adjust the extra length of the coil, which communicates with the outermost side portion of the wound storage groove and is longer than the entire length of the storage groove, at the corner of the lower surface of the rectangular coil case. It has a surplus processing area depressed from the lower surface of the coil case.

In the resonator device,
A nonmagnetic metal base plate whose lower side is adapted to be fixed to a fixing member of the electric vehicle,
A cover case disposed so as to cover an upper surface of the metal base plate, and forming a storage space between the metal base plate and the metal base plate,
The coil case is disposed in the storage space.

In the resonator device,
An inner case which is disposed between the metal base plate and the coil case in the storage space, stores the ferrite core, and on which the control board is disposed is further provided.

In the resonator device,
In the storage space, an insulating sheet having insulation properties is further provided, which is located between the lower surface of the coil case and the ferrite core and covers the coil on the lower surface of the coil case.

In the resonator device,
It has four extra length processing areas which are respectively close to the four corners of the lower surface of the rectangular coil case and communicate with the four outermost sides of the storage groove.

In the resonator device,
When the total length of the coil is longer than the total length of the storage groove, a state in which the first coil terminal is stored in the first terminal arrangement area and the second coil terminal is arranged in the second terminal arrangement area Then, a part of the coil protrudes from the outermost portion of the storage groove into the extra length processing region, so that the extra length of the coil is adjusted.

In the resonator device,
In the four extra length processing regions at the four corners, the length of the coil for adjusting the extra length of the coil is set to be equal.

In the resonator device,
In the direction from the center on the lower surface of the coil case to the first to fourth sides and the four corners of the coil case, adjacent intervals of the spirally formed storage grooves are set to be constant. It is characterized by the following.

In the resonator device,
The first terminal arrangement area and the second terminal arrangement area are arranged close to each other on the first side of the coil case.

In the resonator device,
The width of the first terminal arrangement area and the second terminal arrangement area is larger than the width of the storage groove.

In the resonator device,
The storage groove,
The coil is housed such that the other end of the coil extends along the first side of the coil case, and a straight line orthogonal to the first side on the lower surface of the coil case is The coil is housed so as to pass through the one end of the coil and the other end of the coil.

In the resonator device,
The control board is disposed on a lower surface side of the inner case,
Between the first coil terminal and the first control terminal, and between the second coil terminal and the second control terminal, a through hole penetrating the insulating sheet, the ferrite core, and the inner case is provided. The connection is made by screwing, soldering, or welding.

In the resonator device,
The ferrite core,
It is characterized by comprising a plurality of ferrite plates arranged adjacently on the upper surface of the inner case.

In the resonator device,
The periphery of each of the plurality of ferrite plates is covered with an insulating tape.

In the resonator device,
The cover case is made of a thermosetting resin.

In the resonator device,
The inner case and the coil case each have a rectangular shape,
Four support portions are provided at four corners of the coil case,
Four pedestals are provided at four corners of the inner case,
At the center of the lower surface of the coil case, there is provided a central support portion projecting downward from the lower surface of the coil case,
At the center of the upper surface of the inner case, there is provided a central pedestal portion projecting upward from the center of the upper surface of the inner case,
The four support portions are fixed to the four pedestals in a one-to-one correspondence, and the coil case is supported by the inner case by the central support portion being fixed to the central pedestal portion. It is characterized by being done.

In the resonator device,
The coil case is made of a resin containing glass fiber.

In the resonator device,
The resin constituting the coil case is a thermosetting resin containing glass fiber or a thermoplastic resin containing glass fiber.

In the resonator device,
The thermosetting resin is an unsaturated polyester resin, and the thermoplastic resin is a polyphenylene sulfide resin, a polybutylene terephthalate resin, or a polycarbonate resin.

A resonator device according to one embodiment of the present invention is used for wireless charging of a battery mounted on an electric vehicle and for driving the electric vehicle, for power reception mounted on the electric vehicle or for power transmission installed on the ground. A coil having one end connected to the first coil terminal and the other end connected to the second coil terminal, and a storage groove formed to be wound around the center of the lower surface. A first terminal arrangement area for accommodating the first coil terminal is formed at one end located at the most central side of the wound storage groove, and at the other end located at the outermost position of the wound storage groove. A second terminal arrangement area for accommodating the second coil terminal, a coil case for spirally accommodating the coil in the accommodation groove, a ferrite core arranged adjacent to the lower surface of the coil case, and a first coil. Terminal and a control board which the second control terminal is provided to a first control terminal and a second coil terminal electrically connected are electrically connected, the.

The coil case communicates with the outermost side of the wound storage groove at the corner of the lower surface of the rectangular coil case, and adjusts the extra length of the coil longer than the entire length of the storage groove. It has a surplus processing area recessed from the lower surface of the coil case.

Then, for example, when the total length of the coil is longer than the total length of the storage groove, in a state where the first coil terminal is stored in the first terminal placement area and the second coil terminal is stored in the second terminal placement area, A portion of the coil protrudes from the outermost portion of the storage groove into the extra length processing region, so that the extra length of the coil is adjusted.

(4) Since the resonator device of the present invention has a configuration for processing the extra length of the coil wound around the outside of the coil case, a change in the interval between the coils due to the extra length processing is small.

That is, according to the resonator device of the present invention, it is possible to reduce a decrease in the performance of the resonator due to the extra length processing when winding the coil in the coil case.

FIG. 1 is a diagram showing an example of a configuration of a charging system 1000 including a resonator device 100 according to the present invention. FIG. 2 is a developed view showing an example of the configuration of the power receiving resonator device (vehicle-side resonator device) 100 shown in FIG. FIG. 3 is a top view showing an example of a state where the heat radiation pad HP and the ferrite core FC are housed on the upper surface of the inner case IX shown in FIG. FIG. 4 is a bottom view showing an example of a state where the control board SK is arranged on the lower side of the inner case IX shown in FIG. FIG. 5 is a bottom view showing an example of a state where the coil L is housed in the housing groove LXM on the lower surface of the coil case LX shown in FIG. FIG. 6 is a developed view showing a state where the inner case IX containing the heat radiation pad HP and the ferrite core FC, the insulating sheet, and the coil case LX containing the coil L are combined. FIG. 7 is a top view showing an example of a state in which the heat dissipation pad HP and the inner case IX accommodating the ferrite core FC shown in FIG. 6, the insulating sheet, and the coil case LX accommodating the coil L are combined. FIG. 8 is a cross-sectional view showing an example of a cross section taken along line AA of FIG. FIG. 9 is a cross-sectional view showing an example of a cross section taken along line BB of FIG. FIG. 10 is a cross-sectional view showing an example of a cross section taken along line CC of FIG.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

In the first embodiment, an example of a power receiving resonator device mounted on an electric vehicle and used for wireless charging of a battery for driving the electric vehicle and mounted on the electric vehicle will be described.

FIG. 1 is a diagram showing an example of the configuration of a charging system 1000 including the resonator device 100 according to the present invention.

As shown in FIG. 1, for example, a charging system 1000 according to the present invention includes a distribution board D, a ground-side charging device GC, a power transmitting resonator device (ground-side resonator device) 200, and a vehicle-side charging device VC. , A power receiving resonator device (vehicle-side resonator device) 100, and an electric vehicle V.

The electric vehicle V includes, for example, a battery X for charging power for driving the electric vehicle V, a vehicle-side charging device VC, and a power-receiving resonator device 100, as shown in FIG. ing.

(1) The distribution board D supplies the power supplied from the external power system to the ground-side charging device GC, for example, as shown in FIG.

The ground-side charging device GC is arranged on the ground side, for example, as shown in FIG.

The ground-side charging device GC communicates with the vehicle-side charging device VC to execute wireless charging of the battery X, for example, as shown in FIG.

The ground-side charging device GC includes, for example, a wireless module (not shown) for communicating with the vehicle-side charging device VC, a power supply circuit that receives power from the distribution board D to generate power, and an inverter that converts power. And a controller for controlling the wireless module, the power supply circuit, and the inverter.

The power transmitting resonator device 200 is installed on the ground, for example, as shown in FIG. The power transmitting resonator device 200 is used for wireless charging of the battery X.

The power transmitting resonator device 200 is controlled by a ground-side charging device GC. For example, a power transmitting coil and a control unit (control board) that controls magnetic resonance transmission using the coil are provided. , Is provided.

The power receiving resonator device 100 is mounted on the electric vehicle V (fixed to a fixing member 100A below the electric vehicle V).

The power receiving resonator device 100 is mounted on the electric vehicle V and is used for wireless charging of the battery X for driving the electric vehicle V.

Further, the power receiving resonator device 100 is controlled by a vehicle-side charging device VC. For example, a power receiving coil and a control unit (control board) that controls magnetic resonance transmission using the coil. And.

FIG. 2 is a developed view showing an example of the configuration of the power receiving resonator device (vehicle-side resonator device) 100 shown in FIG. FIG. 3 is a top view showing an example of a state where the heat radiation pad HP and the ferrite core FC are housed on the upper surface of the inner case IX shown in FIG. FIG. 4 is a bottom view showing an example of a state in which the control board SK is arranged on the lower side of the inner case IX shown in FIG. FIG. 5 is a bottom view showing an example of a state where the coil L is housed in the housing groove LXM on the lower surface of the coil case LX shown in FIG. FIG. 6 is a development view showing a state where the inner case IX containing the heat radiation pad HP and the ferrite core FC, the insulating sheet, and the coil case LX containing the coil L are combined. FIG. 7 is a top view showing an example of a state where the heat dissipation pad HP and the inner case IX accommodating the ferrite core FC shown in FIG. 6, the insulating sheet, and the coil case LX accommodating the coil L are combined. . FIG. 8 is a cross-sectional view showing an example of a cross section taken along line AA of FIG. FIG. 9 is a sectional view showing an example of a section taken along line BB of FIG. FIG. 10 is a sectional view showing an example of a section taken along line CC of FIG.

In FIG. 2, when the resonator device 100 is mounted on the electric vehicle V, the vertical direction is reversed. Further, in FIG. 2, screws and the like for locking each component are omitted.

As described above, the power receiving resonator device 100 mounted on the electric vehicle V is used for wireless charging of a battery mounted on the electric vehicle and driving the electric vehicle.

The resonator device 100 includes, for example, as shown in FIG. 2, a cover case CX, a metal base plate AB, a power transmission coil L, a coil case LX, a ferrite core FC, an inner case IX, A control board SK, an insulating sheet IS, and a heat radiation pad HP are provided.

The metal base plate AB is a non-magnetic metal plate whose lower surface is fixed to the fixing member 100A (FIG. 1) of the electric vehicle V.

For example, the metal base plate AB is made of aluminum.

Here, in the above-described metal base plate AB, for example, as shown in FIGS. 1, 6, and 7, a sealing groove ABM1 extending along the periphery is formed.

(4) The cover case CX is arranged so as to cover the upper surface of the metal base plate AB, for example, as shown in FIG.

The cover case CX forms a storage space Z between the cover case CX and the metal base plate AB, for example, as shown in FIG. That is, the storage space Z is a space surrounded by the cover case CX and the metal base plate AB.

A portion of the cover case CX that is in contact with the metal base plate AB is a projection that is fitted to the sealing groove ABM1 formed in the metal base plate AB while being arranged to cover the upper surface of the metal base plate AB. A part is formed. Then, the protrusion is fitted into the sealing groove ABM1 to which the liquid packing has been applied.

The cover case CX is made of, for example, a thermosetting resin (for example, an unsaturated polyester resin).

{Circle around (2)} As shown in FIG. 2, for example, the coil L is disposed in a storage space Z composed of a cover case CX and a metal base plate AB.

コイル The coil L has one end L1 connected to the first coil terminal TL1, and the other end L2 connected to the second coil terminal TL2.

Further, the coil case LX is arranged in a storage space Z formed by a cover case CX and a metal base plate AB, for example, as shown in FIG. .

収納 A storage groove LXM is formed in the coil case LX so as to be wound around the center of the lower surface.

{Circle around (1)} In the coil case LX, a first terminal arrangement area LXH1 for accommodating the first coil terminal TL1 is formed at one end located at the most central side of the wound storage groove LXM.

The first terminal arrangement region LXH1 is formed, for example, so that the first coil terminal TL1 can be screwed to the first control terminal TS1 of the control board SK located below the coil case LX from above the coil case LX. The coil case LX penetrates vertically.

Furthermore, in the coil case LX, a second terminal arrangement area LXH2 for accommodating the second coil terminal TL2 is formed at the other end located on the outermost side of the storage groove LXM around which the bill is wound.

The second terminal arrangement area LXH2 is formed, for example, so that the second coil terminal TL2 can be screwed to the second control terminal TS2 of the control board SK located below the coil case LX from above the coil case LX. The coil case LX penetrates vertically.

Note that, for example, as shown in FIG. 5, the first terminal arrangement area LXH1 and the second terminal arrangement area LXH2 are arranged close to each other on the first side H1 side of the coil case LX.

(5) For example, as shown in FIG. 5, the widths HY1 and HY2 of the first terminal arrangement area LXH1 and the second terminal arrangement area LXH2 are set to be larger than the width MY of the storage groove LXM.

In addition, for example, as shown in FIG. 5, the storage groove LXM stores the coil L so that the other end L2 of the coil L extends along the first side H1 of the coil case LX, and also stores the coil case. The coil L is housed such that a straight line P orthogonal to the first side H1 on the lower surface of the LX passes through one end L1 of the coil L and the other end L2 of the coil L.

{Circle around (4)} The coil case LX accommodates the coil L spirally in the accommodation groove LXM.

コイル The coil case LX has, for example, a rectangular shape as shown in FIG. In particular, as shown in FIG. 5, for example, the upper and lower surfaces of the coil case LX have a square shape.

The coil case LX is provided at the corners (first to fourth corners G1 to G4) of the lower surface of the rectangular coil case LX at the outermost side portion of the wound storage groove LXM. And a surplus processing area LXG1, LXG2, LXG3, LXG4 recessed from the lower surface of the coil case LX for adjusting the surplus length of the coil L longer than the entire length of the storage groove LXM.

More specifically, in the example shown in FIG. 5, the coil case LX is close to the four corners (first to fourth corners G1 to G4) of the lower surface of the rectangular coil case LX, and the storage grooves are provided. It has four first, second, third and fourth extra length processing areas LXG1, LXG2, LXG3 and LXG4 which respectively communicate with the four outermost sides of the LXM.

Here, for example, when the total length of the coil L is longer than the total length of the storage groove LXM, the first coil terminal TL1 is stored in the first terminal placement area LXH1, and the second coil terminal TL2 is stored in the second terminal placement area. In a state where the coil L is disposed in the LXH2, a part of the coil L protrudes from the outermost portion of the storage groove LXM into the extra length processing regions LXG1, LXG2, LXG3, LXG4, so that the extra length of the coil L can be adjusted. ing.

Also, for example, as shown in FIG. 5, from the center on the lower surface of the coil case LX to the first to fourth sides H1 to H4 and the four corners (first to fourth corners G1 to G4) of the coil case LX. In the direction toward, the space between adjacent spirally formed storage grooves LXM is set to be constant.

In particular, as shown in FIG. 5, in the four extra-length processing regions LXG1, LXG2, LXG3, and LXG4 at the four corners (first to fourth corners G1 to G4), the extra length of the coil L is adjusted. (The length of the coil L protruding into the extra length processing regions LXG1, LXG2, LXG3, LXG4) is set to be uniform. Note that, for example, an operator who assembles the resonator device 100 determines that the coil L in the four extra-length processing regions LXG1, LXG2, LXG3, and LXG4 at the four corners (first to fourth corners G1 to G4). The length of the coil for adjusting the surplus length (the length of the coil L protruding into the surplus length processing regions LXG1, LXG2, LXG3, LXG4) is set to be uniform.

Thereby, the change in the interval between the adjacent coils L (especially in the vicinity of the outermost periphery of the wound coil L) due to the extra length processing is small, and the extra length processing when winding the coil L in the coil case LX is involved. A decrease in the performance of the resonator can be reduced.

The coil case LX is made of, for example, a resin containing glass fiber.

The resin forming the coil case LX is a thermosetting resin containing glass fibers or a thermoplastic resin containing glass fibers.

Particularly, the thermosetting resin is, for example, an unsaturated polyester resin. Further, the thermoplastic resin is, for example, a polyphenylene sulfide (PPS) resin, a polybutylene terephthalate resin, or a polycarbonate resin.

Further, as shown in FIG. 2, for example, the ferrite core FC is disposed in a storage space Z formed by the cover case CX and the metal base plate AB, and is disposed on the upper surface of the inner case IX via the heat radiation pad HP. Are located.

{Circle around (2)} The ferrite core FC is arranged in the storage space Z such that the upper surface of the ferrite core FC is adjacent to the lower surface of the coil case LX.

(2) That is, as shown in FIG. 2, for example, the ferrite core FC is disposed in the storage space Z formed by the cover case CX and the metal base plate AB so as to face the coil L.

(3) The ferrite core FC is composed of, for example, a plurality of ferrite plates FCB arranged adjacently on the upper surface of the inner case IX as shown in FIG.

周囲 The plurality of ferrite plates FCB are covered with an insulating tape (for example, a polyimide tape) at each periphery (ends adjacent to each other).

{Circle around (2)} As shown in FIG. 2, for example, the heat radiation pad HP is disposed in the storage space Z and is located between the ferrite core FC and the inner case IX.

放熱 The heat radiation pad HP is made of silicon.

The inner case IX is disposed between the metal base plate AB and the coil case LX in a storage space Z formed by the cover case CX and the metal base plate AB, for example, as shown in FIG. ing.

{Circle around (2)} The inner case IX has a ferrite core housed in the upper surface and a control board SK arranged in the lower surface.

The inner case IX is made of, for example, a thermosetting resin (for example, an unsaturated polyester resin) or a thermoplastic resin (for example, polyphenylene sulfide (PPS) resin).

This inner case IX has, for example, as shown in FIGS. 3 and 6, walls IXK and IXKa provided around the upper surface. The inner case IX accommodates and fixes the ferrite core FC in a region surrounded by walls IXK and IXKa on the upper surface so as to face the coil L.

Furthermore, the inner case IX has a control board SK disposed on the lower surface thereof.

In addition, an insulating groove IXKM, which is recessed downward from the upper surface of the wall IXK, is formed in the upper part of the wall IXK of the inner case IX along the direction in which the wall IXK extends (FIG. 6). 8).

(4) The height of the upper surface of the wall portion IXK of the inner case IX is, for example, higher than the height of the upper surface of the ferrite core FC, as shown in FIG.

Further, for example, as shown in FIG. 8, the coil case LX is arranged in a region surrounded by a wall on the upper surface of the inner case IX such that the ferrite core FC and the coil L face each other via the insulating sheet IS. ing.

Further, the first control terminal TS1 and the second control terminal TS2 of the control board SK are, for example, as shown in FIG. 3, via a first through hole IXR1 and a second through hole IXR2 penetrating the inner case IX in the vertical direction. And is exposed on the upper surface of the inner case IX.

Then, in the vicinity of the upper surface of the inner case IX, the first through hole FCR1 and the second through hole FCR2 of the ferrite core FC (the first through hole HPR1 and the second through hole HPR2 of the heat radiation pad HP, the first through hole of the inner case IX). The first coil terminal TL1 and the first control terminal TS1 are electrically connected through the port IXR1 and the second through-hole IXR2), and the second coil terminal TL2 and the second control terminal TS2 are electrically connected. ing.

In addition, for example, as shown in FIG. 2, the insulating sheet IS is located between the lower surface of the coil case LX and the ferrite core FC in the storage space Z formed by the cover case CX and the metal base plate AB. ing.

絶縁 The insulating sheet IS covers the coil L on the lower surface of the coil case LX and has insulating properties.

{Circle around (4)} The control board SK is arranged on the lower surface side of the inner case IX, for example, as shown in FIG.

Then, as shown in FIG. 3, for example, the control board SK has, on its upper surface, a first control terminal TS1 to which the first coil terminal TL1 is electrically connected, and a second coil terminal TL2 to be electrically connected. A second control terminal TS2 is provided.

FIG. 4 shows a portion of the control board SK that is exposed on the lower surface side of the first coil terminal TL1 and the second coil terminal TL2.

Then, between the first coil terminal TL1 and the first control terminal TS1, and between the second coil terminal TL2 and the second control terminal TS2, pass through the insulating sheet IS, the ferrite core FC, and the inner case IX. The through holes ISR1, ISR2, FCR1, FCR2, HPR1, HPR2, IXR1, IXR2 are connected by screws (FIG. 7).

In addition, between the first coil terminal TL1 and the first control terminal TS1, and between the second coil terminal TL2 and the second control terminal TS2, pass through the insulating sheet IS, the ferrite core FC, and the inner case IX. The through holes ISR1, ISR2, FCR1, FCR2, HPR1, HPR2, IXR1, IXR2 may be connected by soldering or welding.

Further, for example, as shown in FIG. 4, a step J is formed on the lower surface of the inner case IX near the end SKa of the control board SK. Thereby, the creepage distance between the control board SK and the metal base board AB can be increased.

Here, the inner case IX and the coil case LX each have a rectangular (square) shape (FIGS. 2 to 7).

Then, for example, as shown in FIG. 3, four pedestals IF1, IF2, IF3, IF4 are provided at the four corners (first to fourth corners F1 to F4) of the inner case IX.

Furthermore, for example, as shown in FIG. 3, a central pedestal portion IXC protruding upward from the central portion of the upper surface of the inner case IX is provided at the center of the upper surface of the inner case IX.

Then, for example, as shown in FIG. 5, four support portions NG1, NG2, NG3, and NG4 are provided at four corners (first to fourth corner portions G1 to G4) of the coil case LX.

Furthermore, for example, as shown in FIG. 5, a central support portion LXC protruding downward from the lower surface of the coil case LX is provided at the center of the lower surface of the coil case LX.

The four support portions NG1, NG2, NG3, NG4 are fixed to the four pedestal portions IF1, IF2, IF3, IF4 in a one-to-one correspondence (for example, fixed by screws or the like), and the central support portion. The coil case LX is supported by the inner case IX by fixing the LXC to the center pedestal portion IXC (for example, by fixing it with an adhesive or the like) (FIG. 6).

In particular, by fixing the central support portion LXC of the coil case LX to the central pedestal portion IXC of the inner case IX, the distance between the upper surface of the inner case IX and the lower surface of the coil case LX is fixed at a preset distance. It will be.

Further, for example, as shown in FIG. 3, a concave portion IXCa having a step on the inner surface is formed on the upper surface of the central pedestal portion IXC of the inner case IX.

Then, the concave portion IXCa on the upper surface of the central pedestal portion IXC of the inner case IX and the central support portion LXC protruding downward from the lower surface of the coil case LX are fitted to each other, so that it is possible to more reliably fix in a predetermined positional relationship. (FIG. 9).

Then, for example, as shown in FIG. 3, the plurality of ferrite plates FCB are formed on the upper surface of the inner case IX by the central pedestal portion IXC of the inner case IX and the wall portion IXK provided around the upper surface of the inner case IX. It is arranged side by side between.

Also, for example, as shown in FIG. 6, the height IXKah of the wall IXKa (the height from the upper surface of the metal base substrate AB in FIG. 10 to the upper surface of the wall IXKa) at the four corners of the inner case IX is The height of the wall portion IXK at the side between the four corners of the IX is lower than the height IXKh (height from the upper surface of the metal base substrate AB to the upper surface of the wall portion IXK in FIG. 8).

Further, for example, as shown in FIG. 10, the four support portions NG1 to NG4 at the four corners (first to fourth corners G1 to G4) of the coil case LX are respectively provided at the four corners (first to fourth corners) of the inner case IX. The fourth corner portions F1 to F4) are fixed to the four pedestal portions IF1 to IF4 of the inner case IX over the wall portion IXKa.

Particularly, in the vicinity of the four support portions NG1 to NG4 of the coil case LX, projecting portions LXa projecting downward are provided, and the upper portion of the wall portion IXKa at the four corners of the inner case IX is provided with the wall portion IXKa. An insulating groove IXKaM recessed downward from the upper surface of the inner case IX is formed along the direction in which the wall IXKa extends at the four corners of the inner case IX (FIGS. 6 and 10).

The protrusions LXa of the four support portions NG1 to NG4 of the coil case LX are inserted into the insulating grooves IXKaM of the wall IXKa at the four corners (first to fourth corners F1 to F4) of the inner case IX. The distance between the upper surface of the inner case IX and the lower surface of the coil case LX is fixed to a preset distance.

The center support portion LXC of the coil case LX has a through hole ISQ provided at the center of the insulating sheet IS, a through hole FCQ provided at the center of the ferrite core FC, and a through hole provided at the center of the heat radiation pad HP. Through the mouth HPQ (FIG. 2), it is fixed to the central base IXC of the inner case IX.

As described above, according to the resonator device 100 according to the first embodiment, the coil case CX is located at the corners G1 to G4 on the lower surface of the rectangular coil case CX, at the outermost position of the storage groove LXM that is wound around. There is extra length processing regions LXG1 to LXG4 that are recessed from the lower surface of the coil case CX for adjusting the extra length of the coil that is longer than the entire length of the storage groove LXM and communicates with the side part to be formed.

Then, for example, when the total length of the coil L is longer than the total length of the storage groove LXM, the first coil terminal TL1 is stored in the first terminal placement area LXH1, and the second coil terminal TL2 is stored in the second terminal placement area LXH2. In this state, a part of the coil protrudes from the outermost portion of the storage groove LXM into the extra length processing regions LXG1 to LXG4, so that the extra length of the coil is adjusted.

{Circle around (2)} Since the resonator device 100 has a configuration for processing the extra length of the coil wound around the outside of the coil case, a change in the interval between the coils due to the extra length processing is small.

In other words, according to the resonator device 100 according to the first embodiment, it is possible to reduce a decrease in the performance of the resonator due to the extra length processing when winding the coil in the coil case.

In the first embodiment described above, the example of the power receiving resonator device 100 mounted on the electric vehicle and used for wireless charging of the battery for driving the electric vehicle and mounted on the electric vehicle has been described.

However, the present invention can be applied to a power transmission resonator device 200 mounted on an electric vehicle and used for wireless charging of a battery for driving the electric vehicle, and installed on the ground. In this case, the coil of the power receiving resonator device 100 corresponds to the coil of the power transmitting resonator device 200.

The other configurations of the resonator device according to the second embodiment are the same as those of the first embodiment.

As described above, the resonator device according to one embodiment of the present invention is used for wireless charging of a battery mounted on an electric vehicle and for driving the electric vehicle, and used for power reception or on the ground mounted on the electric vehicle. A resonator device for power transmission, which surrounds a coil L having one end L1 connected to a first coil terminal TL1 and the other end L2 connected to a second coil terminal TL2, and a center part on a lower surface. A storage groove LXM is formed so as to be wound around the first groove, and a first terminal arrangement area for storing the first coil terminal TL1 is formed at one end of the wound storage groove LXM located at the most central portion side. A second terminal arrangement area for accommodating the second coil terminal TL2 is formed at the other end located on the outermost side of the turned storage groove LXM, and a coil case for spirally storing the coil in the storage groove LXM LX, a ferrite core FC arranged adjacent to the lower surface of the coil case, and a second control in which a first control terminal and a second coil terminal are electrically connected to the first coil terminal. A control board provided with terminals.

The coil case communicates with a corner (first corner) of the lower surface of the rectangular coil case and communicates with the outermost side of the wound storage groove LXM and is longer than the entire length of the storage groove LXM. Of the coil case for adjusting the extra length of the coil case.

Then, for example, when the total length of the coil L is longer than the total length of the storage groove LXM, the first coil terminal TL1 is stored in the first terminal arrangement area and the second coil terminal TL2 is stored in the second terminal arrangement area. In this state, a part of the coil protrudes from the outermost portion of the storage groove LXM into the extra length processing region, so that the extra length of the coil is adjusted.

Although some embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. These embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and equivalents thereof.

Charging system 1000
D Distribution board GC Ground side charging device 200 Resonator device for power transmission (ground side resonator device)
VC Vehicle-side charging device 100 Resonator device for receiving power (vehicle-side resonator device)
V Electric car CX Cover case AB Metal base plate L Power transmission coil LX Coil case FC Ferrite core IX Inner case SK Control board IS Insulation sheet HP Heat radiation pad

Claims

A resonator mounted on an electric vehicle and used for wireless charging of a battery for driving the electric vehicle, for power reception or power transmission mounted on the electric vehicle, a resonator device,
A coil having a first coil terminal connected to one end and a second coil terminal connected to the other end;
A storage groove is formed so as to surround the central portion of the lower surface and is wound, and a first terminal arrangement area for storing the first coil terminal is provided at one end located closest to the center of the wound storage groove. Is formed, and a second terminal arrangement area for accommodating the second coil terminal is formed at the other end located on the outermost side of the wound storage groove, and the coil is spirally stored in the storage groove. Coil case,
A ferrite core arranged to be adjacent to the lower surface of the coil case;
A control board provided with a first control terminal to which the first coil terminal is electrically connected and a second control terminal to which the second coil terminal is electrically connected;
With
The coil case,
In order to adjust the extra length of the coil, which communicates with the outermost side portion of the wound storage groove and is longer than the entire length of the storage groove, at the corner of the lower surface of the rectangular coil case. A resonator device having a surplus processing area depressed from a lower surface of the coil case.
A nonmagnetic metal base plate whose lower side is adapted to be fixed to a fixing member of the electric vehicle,
A cover case disposed so as to cover an upper surface of the metal base plate, and forming a storage space between the metal base plate and the metal base plate,
The resonator device according to claim 1, wherein the coil case is disposed in the storage space.
3. An inner case which is disposed between the metal base plate and the coil case in the storage space, stores the ferrite core, and further includes an inner case in which the control board is disposed. The resonator device as described in the above.
In the storage space, a lower surface of the coil case is provided between the lower surface of the coil case and the ferrite core to cover the coil on the lower surface of the coil case, and further includes an insulating sheet having an insulating property. Item 3. The resonator device according to item 3.
5. Four extra-length processing regions which are respectively adjacent to four corners of the lower surface of the coil case having the rectangular shape and communicate with the four outermost sides of the storage groove, respectively. 3. The resonator device according to 1.
When the total length of the coil is longer than the total length of the storage groove, a state in which the first coil terminal is stored in the first terminal arrangement area and the second coil terminal is arranged in the second terminal arrangement area The extra length of the coil is adjusted by part of the coil protruding from the outermost portion of the storage groove into the extra length processing area. 3. The resonator device according to 1.
The resonator according to claim 6, wherein the four extra length processing regions at the four corners are set so that the lengths of the coils for adjusting the extra length of the coil become uniform. apparatus.
In the direction from the center on the lower surface of the coil case to the first to fourth sides and the four corners of the coil case, adjacent intervals of the spirally formed storage grooves are set to be constant. The resonator device according to claim 7, wherein:
The resonator device according to claim 8, wherein the first terminal arrangement region and the second terminal arrangement region are arranged close to each other on the first side of the coil case.
The resonator device according to claim 8, wherein a width of the first terminal arrangement area and a width of the second terminal arrangement area are larger than a width of the storage groove.
The storage groove,
The coil is housed such that the other end of the coil extends along the first side of the coil case, and a straight line orthogonal to the first side on the lower surface of the coil case is The resonator device according to claim 8, wherein the coil is housed so as to pass through the one end of the coil and the other end of the coil.
The control board is disposed on a lower surface side of the inner case,
Between the first coil terminal and the first control terminal, and between the second coil terminal and the second control terminal, a through hole penetrating the insulating sheet, the ferrite core, and the inner case is provided. The resonator device according to claim 6, wherein the resonator device is connected by screwing, soldering, or welding.
The ferrite core,
The resonator device according to claim 3, comprising a plurality of ferrite plates arranged adjacently on an upper surface of the inner case.
The resonator device according to claim 13, wherein each of the plurality of ferrite plates is covered with an insulating tape.
The resonator device according to claim 3, wherein the cover case is made of a thermosetting resin.
The inner case and the coil case each have a rectangular shape,
Four support portions are provided at four corners of the coil case,
Four pedestals are provided at four corners of the inner case,
At the center of the lower surface of the coil case, there is provided a central support portion projecting downward from the lower surface of the coil case,
At the center of the upper surface of the inner case, there is provided a central pedestal portion projecting upward from the center of the upper surface of the inner case,
The four support portions are fixed to the four pedestals in a one-to-one correspondence, and the coil case is supported by the inner case by the central support portion being fixed to the central pedestal portion. The resonator device according to claim 8, wherein:
The resonator device according to claim 1, wherein the coil case is made of a resin containing glass fiber.
18. The resonator device according to claim 17, wherein the resin forming the coil case is a thermosetting resin containing glass fiber or a thermoplastic resin containing glass fiber.
The resonator device according to claim 18, wherein the thermosetting resin is an unsaturated polyester resin, and the thermoplastic resin is a polyphenylene sulfide resin, a polybutylene terephthalate resin, or a polycarbonate resin.