KR102110400B1 - Receiving antennas and wireless power receiving apparatus comprising the same - Google Patents

Abstract

A receiving antenna of a wireless power receiving device for wirelessly charging power according to an embodiment of the present invention is a substrate, a first soft magnetic layer made of a soft magnetic material, and electromagnetic radiation emitted from a wireless power transmitting device A first coil layer receiving energy, a first coil layer wound parallel to the soft magnetic layer, and a second coil layer electrically connected to the first coil layer and wound parallel to the first coil layer, wherein the first coil layer It includes a coil layer and a receiving coil having a reverse current direction of the second coil layer.

Description

A receiving antenna and a wireless power receiving device including the same TECHNICAL FIELD RECEIVING ANTENNAS AND WIRELESS POWER RECEIVING APPARATUS COMPRISING THE SAME

The present invention relates to wireless charging, and more particularly, to a receiving antenna for wireless charging and a wireless power receiving device including the same.

The wireless power transmission / reception technology is a technology for wirelessly supplying power to electronic devices, and can be applied not only to charging a battery of a portable terminal, but also to supplying power to household electronic products and power supply to an electric vehicle or subway.

In order to increase power transmission / reception efficiency, it is necessary to minimize energy loss between the wireless power transmission device and the wireless power reception device. To this end, the transmitting antenna and the receiving antenna may be aligned with each other within an effective distance. In addition, by arranging a soft magnetic material around the transmitting antenna and the receiving antenna, it is possible to focus the electromagnetic energy emitted by the transmitting antenna in the direction of the receiving antenna.

However, the soft magnetic material disposed around the receiving antenna has a thin thickness and a high magnetic permeability in a planar direction. When the magnetization value of the soft magnetic material for the receiving antenna is saturated, electromagnetic energy from the transmitting antenna may leak. Accordingly, there is a need for a method of improving transmission efficiency between a transmitting antenna and a receiving antenna.

Korean Patent Publication No. 2013-0050633 (2013.05.16) Korean Patent Publication No. 2008-0012782 (2008.02.12) Korean Patent Publication No. 2013-0048749 (2013.05.10) United States Patent Publication No. 2012/0086281 (2012.04.12)

The technical problem to be achieved by the present invention is to provide a structure of a receiving antenna for improving the wireless power receiving efficiency of the wireless power receiving device.

A wireless power receiving and communication device according to an embodiment of the present invention includes a plurality of soft magnetic layers including a first soft magnetic layer and a second soft magnetic layer; An adhesive layer disposed to face the plurality of soft magnetic layers and a first surface; A coil portion disposed on a second surface of the adhesive layer that is opposite to the first surface of the adhesive layer; And a heat dissipation layer disposed adjacent to the plurality of soft magnetic layers, wherein the plurality of soft magnetic layers include Fe, and the coil portion includes a first coil layer and the first contacting the second surface of the adhesive layer. A wireless power receiving coil including a second coil layer disposed on the coil layer; And an NFC coil including a third coil layer contacting the second surface of the adhesive layer and a fourth coil layer disposed on the third coil layer; and including the third coil layer and the fourth coil layer. Is electrically connected to each other to surround side surfaces of the first coil layer and the second coil layer, and the first coil layer includes a first connection portion formed in an inner region of the wireless power receiving coil, and the second coil layer Includes a second connection portion formed in an inner region of the wireless power receiving coil, the first connection portion and the second connection portion are electrically connected to each other, and a support film is provided between the first coil layer and the second coil layer. Is placed.
The support film may include a first through hole and a second through hole, and the first connection portion and the second connection portion may be electrically connected through the first through hole.
The first coil layer includes a third connection portion formed in an outer region of the wireless power receiving coil, and the second coil layer includes a fourth connection portion formed in an outer region of the wireless power receiving coil, and the third connection portion And the fourth connection part may be electrically connected to each other.
The third connection portion and the fourth connection portion may be electrically connected through the second through hole.
The support film may be disposed between the third coil layer and the fourth coil layer.
The number of turns of the first coil layer and the second coil layer may be the same.
The number of turns of the third coil layer and the fourth coil layer may be the same.
The number of turns of the first coil layer may be greater than the number of turns of the third coil layer.
The second soft magnetic layer may be disposed between the first soft magnetic layer and the adhesive layer.
The heat dissipation layer may be disposed between the second soft magnetic layer and the coil portion.
The wireless power receiving coil may have an inner diameter of 20 mm or more and an outer diameter of 50 mm or less.
The adhesive layer may include polyimide.
The first connection portion, the second connection portion, the third connection portion and the fourth connection portion may be formed inside the NFC coil.
The direction of the current of the first coil layer may be opposite to the direction of the current of the second coil layer.
The first coil layer and the third coil layer may be disposed on the same plane.

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According to the exemplary embodiment of the present invention, in the wireless power receiving apparatus, the electromagnetic energy focusing performance of the receiving antenna may be increased, thereby maximizing wireless power transmission and reception efficiency. In particular, it is possible to obtain improved power transmission efficiency by reducing the thickness of the receiving antenna and reducing the distance between the transmitting antenna and the receiving antenna.

Accordingly, it is possible to obtain a required level of electromagnetic energy focusing effect even at a thin thickness, and thus, it can be applied to various electronic devices (eg, TVs, portable terminals, notebooks, tablet PCs, etc.) in a slimming trend.

In addition, since the electromagnetic energy focusing performance is excellent and the material price is low, it can be applied to large-scale applications such as electric vehicles, subways, and trains.

Further, even if the wireless power transmission device includes a permanent magnet, it is possible to absorb the influence of the permanent magnet and obtain high power transmission efficiency. In addition, compatibility is possible even when the wireless power transmission device does not include a permanent magnet.

In addition, the manufacturing process is simple and the burden of additional cost increase is small.

1 is a block diagram showing a wireless power transmission and reception system according to an embodiment of the present invention.
2 is a view showing a part of the wireless power transmission apparatus, and FIG. 3 is a view showing a part of the wireless power reception apparatus.
4 shows power transmission efficiency between the wireless power transmitter and the wireless power receiver according to the thickness of the soft magnetic layer.
5 is a partial cross-sectional view of a wireless power transmission apparatus and a wireless power reception apparatus according to an embodiment of the present invention.
6 is an example of the first coil layer and the second coil layer.
7 shows an example in which one coil layer is embedded in a soft magnetic layer according to an embodiment of the present invention, and FIG. 8 shows an example in which two coil layers are embedded in a soft magnetic layer according to another embodiment of the present invention.
9 shows an example in which sheets of soft magnetic material are laminated according to an embodiment of the present invention.
10 shows an example in which a receiving antenna is embedded in a rear case of a portable terminal according to an embodiment of the present invention.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as second and first may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the second component may be referred to as a first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as a second component. The term and / or includes a combination of a plurality of related described items or any one of a plurality of related described items.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings, but the same or corresponding components are assigned the same reference numbers regardless of reference numerals, and redundant descriptions thereof will be omitted.

1 is a block diagram showing a wireless power transmission and reception system according to an embodiment of the present invention.

Referring to FIG. 1, a wireless power transmission / reception system includes a wireless power transmission device 100 and a wireless power reception device 200. The wireless power transmission apparatus 100 applies electrical energy to the transmission antenna, and the transmission antenna converts electrical energy into electromagnetic energy and radiates it to the surroundings. The wireless power receiving apparatus 200 receives electromagnetic energy radiated from a transmitting antenna using a receiving antenna, converts it into electrical energy, and charges it.

Here, the wireless power transmission apparatus 100 is, for example, a transmission pad. In addition, the wireless power receiving device 200 may be a part of a portable terminal to which wireless power transmission and reception technology is applied, a household / personal electronic product, a transportation means, and the like. A portable terminal to which wireless power transmission / reception technology is applied, household / personal electronic products, and transportation means include only the wireless power receiving device 200 or both the wireless power transmitting device 100 and the wireless power receiving device 200. Can be set.

Meanwhile, the wireless power receiving device 200 may be configured to include a module having wireless power transmission and reception (WPC) functions and near field communication (NFC) functions simultaneously. In this case, the wireless power receiving device 200 may perform short-range wireless communication with the external device 300 including the NFC module.

2 is a view showing a part of the wireless power transmission apparatus, and FIG. 3 is a view showing a part of the wireless power reception apparatus.

Referring to FIG. 2, the wireless power transmission apparatus 100 includes a transmission circuit (not shown), a soft magnetic core 110, a transmission antenna 120, and a permanent magnet 130.

The soft magnetic core 110 may be made of a soft magnetic material having a thickness of several mm. In addition, the transmission antenna 120 is made of a transmission coil, and the permanent magnet 130 may be surrounded by the transmission antenna 120.

Referring to FIG. 3, the wireless power receiving apparatus 200 includes a receiving circuit (not shown), a soft magnetic layer 210, and a receiving coil 220. The soft magnetic layer 210 may be stacked on a substrate (not shown). The substrate may be formed of several layers of fixed sheets, and bonded to the soft magnetic layer 210 to fix the soft magnetic layer 210.

The soft magnetic layer 210 focuses electromagnetic energy radiated from the transmission antenna 120 of the wireless power transmission apparatus 100.

The soft magnetic layer 210 may be made of a metal material or a ferrite material, and the soft magnetic layer 210 may have various forms such as pellets, plates, ribbons, foils, and films. Can be implemented as For example, the soft magnetic layer 210 may be in the form of a composite containing a single metal or alloy powder flake and a polymer resin containing at least one of Fe, Co, and Ni. As another example, the soft magnetic layer 210 may be an alloy ribbon, a laminated ribbon, a foil, or a film including at least one of Fe, Co, and Ni. As another example, the soft magnetic layer 210 may be a composite containing 90 wt% or more of FeSiCr flakes and 10 wt% or less of polymer resin. As another example, the soft magnetic layer 210 may be a sheet, ribbon, foil, or film containing Ni-Zn ferrite.

The receiving coil 220 is stacked on the soft magnetic layer 210. The receiving coil 220 may be formed of a coil surface wound on the soft magnetic layer 210 in a direction parallel to the soft magnetic layer 210. For example, a receiving antenna applied to a smartphone may be in the form of a spiral coil within an outer diameter of 50 mm and an inner diameter of 20 mm or more. The receiving circuit converts electromagnetic energy received through the receiving coil 220 into electrical energy, and charges the converted electrical energy into a battery (not shown).

Although not illustrated, a heat dissipation layer may be further included between the soft magnetic layer 210 and the receiving coil 220. In this specification, the soft magnetic layer 210 and the receiving coil 220 may be referred to as a receiving antenna.

When the wireless power receiving device 200 has the WPC function and the NFC function at the same time, the NFC coil 230 may be further stacked on the soft magnetic layer 210. The NFC coil 230 may be formed to surround the outside of the receiving coil 220.

In addition, each of the receiving coil 220 and the NFC coil 230 may be electrically connected through the terminal 240.

4 shows power transmission efficiency between the wireless power transmitter and the wireless power receiver according to the thickness of the soft magnetic layer.

Referring to FIG. 4, when a soft magnetic layer having a magnetic permeability of 50 is used, the power transmission efficiency increases rapidly until the thickness of the soft magnetic layer becomes 0.1 mm, and then tends to increase slowly after 0.2 mm. That is, when the thickness of the soft magnetic layer is 0.2 to 0.3 mm, most of the magnetic field shielding is possible. On the other hand, it is estimated that 25% of the lost energy is leaked sideways through the gap (approximately 5 mm) between the transmitting antenna and the receiving antenna.

When the wireless power transmission apparatus includes a permanent magnet, the separation distance between the transmitting antenna and the receiving antenna is 5 mm, and the thickness of the soft magnetic layer on which the receiving coil is stacked is 0.2 mm, the magnetic inductive coupling coefficient in the range of 50 to 200 permeability It has a value of 0.75 to 0.8. That is, it is common to obtain a transmission efficiency of 6-70%, considering the loss of conductivity and circuit.

On the other hand, Equation 1 represents the magnetic inductive coupling coefficient.

Here, k is a magnetic inductive coupling coefficient, L _Rx is the inductance of the receiving antenna, L _Tx is the inductance of the transmitting antenna, and M is the mutual inductance between the transmitting antenna and the receiving antenna (mutual inductance) to be.

L _Rx may be represented by Equation 2 again, and L _Tx may be represented by Equation 3 again.

Here, L _Rx-self is the self-inductance of the receiving antenna, L _Rx-mutual is the mutual inductance of the receiving antenna, L _Tx-self is the self-inductance of the transmitting antenna, and L _{Tx -mutual} is the mutual inductance of the transmitting antenna.

Referring to Equations 1 to 3, in order to increase k, the inductance of the receiving antenna and the transmitting antenna must be reduced. Since L _Rx-self and L _Tx-self are electrical characteristics determined by the length of the conductor, the inductance can be reduced according to the turn number of the antenna, but this also affects the mutual inductance between the transmitting antenna and the receiving antenna. It is not effective. In addition, it is possible to increase k by reducing L _Tx-mutual , but this causes a weakening of the magnetic field of the transmitting antenna. Accordingly, a method of increasing k by reducing L _Rx-mutual can be considered.

According to one embodiment of the present invention, by using a pair of coil layer structure (coupled coil structure) to reduce the mutual inductance of the receiving antenna, that is, L _Rx-mutual , k, that is, power transmission by increasing the magnetic induction coupling coefficient We want to increase efficiency.

5 is a partial cross-sectional view of a wireless power transmission apparatus and a wireless power reception apparatus according to an embodiment of the present invention.

Referring to FIG. 5, a receiving coil 220 is formed on one surface of the soft magnetic layer 210. In order to show the relationship between the wireless power transmission apparatus and the wireless power reception apparatus, the receiving coil 220 is illustrated as being formed under the soft magnetic layer 210, but the reception including the soft magnetic layer 210 and the receiving coil 220 The antenna structure can be inverted 180 degrees. Although not shown, an adhesive sheet for bonding the soft magnetic layer 210 and the receiving coil 220 may be further included between the soft magnetic layer 210 and the receiving coil 220. At this time, the receiving coil 220 may include at least two coil layers. That is, the first coil layer 222 wound parallel to the plane direction of the soft magnetic layer 210 and the second coil layer 224 wound parallel to the plane direction of the first coil layer 222 may be included. . In addition, a support film 510 for supporting both coil layers may be further stacked between the first coil layer 222 and the second coil layer 224. The support film 510 may be made of, for example, polyimide (PI) material.

Here, the first coil layer 222 and the second coil layer 224 may be electrically connected. That is, one terminal of the first coil layer 222 and one terminal of the second coil layer 224 may be connected to each other. For example, one terminal of the first coil layer 222 and one terminal of the second coil layer 224 may be electrically connected through a through hole formed in the support film 510.

At this time, the first coil layer 222 and the second coil layer 224 have opposite current directions. Accordingly, the inductance is canceled, and the mutual inductance of the receiving antenna, i.e., L _Rx-mutual, is reduced, and k, that is, the magnetic inductive coupling coefficient can be increased.

According to an embodiment of the present invention, the first coil layer 222 and the second coil layer 224 have the same shape and may be stacked by being inverted 180 degrees from each other. 6 shows an example of the first coil layer and the second coil layer. 6 (a) and 6 (b), the width (W1, W2), height (H1, H2), and the number of times of winding of the first coil layer 222 and the second coil layer 224 are the same. And, the same coil layer may be inverted to overlap each other. That is, the second coil layer 224 having the same shape as the first coil layer 222 is inverted on the first coil layer 222 to be formed to cover the entirety of the first coil layer 222. Then, one of the two terminals 222-1 and 222-2 of the first coil layer 222 may be electrically connected to one of the two terminals 224-1 and 224-2 of the second coil layer 224. have.

Although not shown, the NFC coil 230 may be further formed on the soft magnetic layer 210 to surround the receiving coil 220. At this time, the NFC coil 230 may be made of two coil layers electrically connected to the receiving coil 220 as well.

Meanwhile, according to an embodiment of the present invention, at least one of the first coil layer 222 and the second coil layer 224 may be embedded in the soft magnetic layer 210.

7 shows an example in which one coil layer is embedded in a soft magnetic layer according to an embodiment of the present invention, and FIG. 8 shows an example in which two coil layers are embedded in a soft magnetic layer according to another embodiment of the present invention.

Referring to FIGS. 7 and 8, one coil layer 222 or two coil layers 222 and 224 are embedded in the soft magnetic layer 210 in the receiving antenna structure including a pair of coil layers. In order to facilitate the embedding of the coil layers 222 and 224, the soft magnetic layer 210 may be made of a composite containing a soft magnetic metal and a polymer resin.

Although not shown, an adhesive sheet made of a polyethylene terephthalate (PET) material may be further included between the coil layers 222 and 224 and the soft magnetic layer 210. The adhesive sheet of the PET material may insulate between the coil layers 222 and 224 and the soft magnetic layer 210.

As described above, when at least a portion of the coil layers 222 and 224 are embedded in the soft magnetic layer 210, the distance between the receiving coil and the transmitting coil is reduced, and the total thickness of the receiving antenna can be reduced. Accordingly, leakage magnetic flux generated outward due to a gap between the receiving coil and the transmitting coil can be reduced, the mutual inductance between the receiving coil and the transmitting coil is increased, and as a result, the magnetic inductive coupling coefficient is increased. By increasing the power transmission efficiency can be increased.

On the other hand, according to an embodiment of the present invention, lamination of a sheet of soft magnetic material on the other surface of the soft magnetic layer 210 may minimize leakage flux.

9 shows an example in which sheets of soft magnetic material are laminated according to an embodiment of the present invention.

Referring to FIG. 9, in the structure in which the coil layers 222 and 224 are embedded in the soft magnetic layer 210, a sheet 212 of soft magnetic material is further laminated on the other surface of the soft magnetic layer 210. In this specification, the soft magnetic layer 210 may be mixed with the first soft magnetic layer, and the sheet 212 of the soft magnetic material may be mixed with the second soft magnetic layer.

Accordingly, magnetic flux leaking out of the soft magnetic layer 210 due to the coil layers 222 and 224 may be prevented.

In FIG. 9, only two coil layers are buried in the soft magnetic layer 210, but one coil layer is buried in the soft magnetic layer 210, or both coil layers are not buried and are not buried. In the stacked structure, the soft magnetic material sheet 212 may be further laminated.

Further, according to an embodiment of the present invention, a receiving antenna including a soft magnetic layer and a receiving coil may be embedded in a case of a wireless power receiving device.

10 shows an example in which a receiving antenna is embedded in a rear case of a portable terminal according to an embodiment of the present invention.

Referring to FIG. 10, in a structure in which two coil layers 222 and 224 are embedded in the soft magnetic layer 210 and the sheet 212 of the soft magnetic material is laminated, the coil layers 222 and 224 and the soft magnetic layer ( 210) and a soft magnetic material sheet 212 are embedded in the rear case 900 of the mobile terminal. To this end, after forming a groove in the rear case 900 of the portable terminal, the groove and the receiving antenna structure may be glued.

Accordingly, the distance between the receiving coil 220 and the transmitting coil 120 can be reduced, and the transmission power efficiency can be increased.

In FIG. 10, two coil layers 222 and 224 are embedded in the soft magnetic layer 210 and illustrate a structure in which sheets 212 of a soft magnetic material are laminated, but one coil layer has a soft magnetic layer 210. It may be buried within, or both of the coil layers may be buried in the case even in a structure not stacked on the soft magnetic layer 210 and a structure that does not include the sheet 212 of the soft magnetic material.

Table 1 shows the results of measuring the power transmission efficiency according to various embodiments of the present invention.

No. rescue Transmission efficiency Soft magnetic layer thickness Receiving coil thickness Other Landfill thickness Total thickness Comparative Example 1 1st floor receive coil 61% 0.3mm 0.1mm * 1 Supporting film (20㎛) Adhesive sheet (30㎛) - 0.45mm Example 1 Two-layer receiving coil 65% 0.3mm 0.1mm * 2 Supporting film (20㎛) Adhesive sheet (30㎛) - 0.55mm Example 2 Example 1 + 1st floor reclamation 65.6% 0.3mm 0.1mm * 2 Supporting film (20㎛) Adhesive sheet (30㎛) 0.1mm 0.45mm Example 3 Example 1 + 2 floor reclamation 66.9% 0.3mm 0.1mm * 2 Adhesive sheet (60㎛) 0.2mm 0.36mm Example 4 Example 3 + Add Sheet 68.2% 0.35mm 0.1mm * 2 Adhesive sheet (60㎛) 0.2mm 0.41mm Example 5 Example 4 + embedding in case 68.2% 0.35mm 0.1mm * 2 Adhesive sheet (60㎛) 0.41mm -

Referring to Table 1, in Comparative Example 1, the magnetic permeability of 50 mm, a 0.3 mm thick FeSiCr-based soft magnetic metal-polymer resin, a 0.1 mm thick single layer coil is laminated on the soft magnetic layer, and a support film is 20 A general receiving antenna structure including a polyimide film having a thickness of µm was used. In Example 1, other conditions are the same as in Comparative Example 1, but a two-layer coil with a thickness of 0.1 mm was stacked on the soft magnetic layer, and a receiving antenna structure including a support film between both coil layers was used.

In Example 2, other conditions were the same as in Example 1, but a receiving antenna structure in which one coil layer was embedded in the soft magnetic layer was used. At this time, the coil was buried using a hot press process at 150 ° C and 100 kgf / cm ² .

In Example 3, the other conditions are the same as in Example 1, but both coil layers are embedded in the soft magnetic layer, and a receive antenna structure stamping a Cu foil of 0.1 mm thickness instead of a support film between both coil layers is used. Used. At this time, the coil was buried using a hot press process at 150 ° C and 100 kgf / cm ² .

 In Example 4, other conditions were the same as in Example 3, but a receiving antenna structure in which a soft magnetic sheet having a thickness of 50 was further laminated was used.

In Example 5, other conditions were the same as in Example 4, but the receiving antenna structure was embedded in a case made of a PC-based resin in a hot block process at 80 ° C. and 10 kgf / cm ² .

Comparing Comparative Example 1 and Example 1, it can be seen that the power transmission efficiency is increased by 4%. In addition, comparing Comparative Example 1 and Examples 2 and 3, it can be seen that while maintaining or reducing the total thickness, the transmission power efficiency can be increased by 4% or more.

In addition, comparing Example 3 and Example 4, it can be seen that the leakage magnetic flux can be prevented by additional lamination of the soft magnetic sheet to maximize power transmission efficiency.

In addition, comparing Example 3 and Example 5, it can be seen that, while maximizing power transmission efficiency, a separate thickness for the receiving antenna is not required, and a wireless power receiving device having a thin thickness can be implemented.

Although described above with reference to preferred embodiments of the present invention, those skilled in the art variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You can understand that you can.

200: wireless power receiver
210: soft magnetic layer
220: receiving coil
230: NFC coil
222: first coil layer
224: second coil layer
510: support film

Claims (15)

A plurality of soft magnetic layers including a first soft magnetic layer and a second soft magnetic layer;
An adhesive layer disposed to face the plurality of soft magnetic layers and a first surface;
A coil portion disposed on a second surface of the adhesive layer that is opposite to the first surface of the adhesive layer;
It includes; a heat dissipation layer disposed adjacent to the plurality of soft magnetic layers;
The plurality of soft magnetic layers include Fe,
The coil portion,
A wireless power receiving coil including a first coil layer contacting the second surface of the adhesive layer and a second coil layer disposed on the first coil layer; And
Includes; NFC coil including a third coil layer and a fourth coil layer disposed on the third coil layer in contact with the second surface of the adhesive layer;
The third coil layer and the fourth coil layer are electrically connected to each other to surround side surfaces of the first coil layer and the second coil layer,
The first coil layer includes a first connection portion formed in an inner region of the wireless power receiving coil,
The second coil layer includes a second connection formed in the inner region of the wireless power receiving coil,
The first connection portion and the second connection portion are electrically connected to each other,
A wireless power receiving and communication device in which a support film is disposed between the first coil layer and the second coil layer. According to claim 1,
The support film includes a first through hole and a second through hole, and the first connection part and the second connection part are wireless power receiving and communication devices electrically connected through the first through hole. According to claim 2,
The first coil layer includes a third connection formed in the outer region of the wireless power receiving coil,
The second coil layer includes a fourth connection formed in an outer region of the wireless power receiving coil,
The third connection part and the fourth connection part are wireless power reception and communication devices electrically connected to each other. According to claim 3,
The third connection part and the fourth connection part are wireless power reception and communication devices electrically connected through the second through hole. According to claim 4,
A wireless power receiving and communication device in which the support film is disposed between the third coil layer and the fourth coil layer. According to claim 4,
The number of turns of the first coil layer and the second coil layer is the same wireless power receiving and communication device. The method of claim 6,
The number of turns of the third coil layer and the fourth coil layer is the same wireless power receiving and communication device. The method of claim 7,
The number of turns of the first coil layer is greater than the number of turns of the third coil layer. According to claim 1,
The second soft magnetic layer is a wireless power receiving and communication device disposed between the first soft magnetic layer and the adhesive layer. The method of claim 9,
The heat dissipation layer is a wireless power receiving and communication device disposed between the second soft magnetic layer and the coil portion. According to claim 1,
A wireless power receiving and communication device having an inner diameter of 20 mm or more and an outer diameter of 50 mm or less of the wireless power receiving coil. According to claim 1,
The adhesive layer is a wireless power receiving and communication device comprising a polyimide. According to claim 4,
The first connection unit, the second connection unit, the third connection unit and the fourth connection unit is a wireless power receiving and communication device formed inside the NFC coil. According to claim 1,
A wireless power receiving and communication device in which the direction of the current of the first coil layer is opposite to the direction of the current of the second coil layer. According to claim 1,
The first coil layer and the third coil layer is a wireless power receiving and communication device disposed on the same plane.

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