KR101932225B1 - Wireless-chargable battery contained band and system for wirelessly charging battery of band - Google Patents

Abstract

Disclosed is a system for wirelessly charging a wireless built-in battery built-in band and a battery built therein. A magnetic field shielding layer is embedded to cover a predetermined internal area of the flexible band, and a lead-loop type faucet inductor is disposed thereon. A rectifying section for rectifying an alternating current induced in the power receiving inductor by an external time varying magnetic field to a direct current, and a battery section for charging the direct current. The magnetic field shielding layer, the power receiving inductor, and the battery portion have flexibility corresponding to the flexible band so as not to be damaged by the flexure of the flexible band. A wireless charging platform for wirelessly charging a battery built-in band includes a holder for holding the battery-incorporated band, an inverter for converting a direct current of the direct current power source into an alternating current, a time varying magnetic field generator Transmission inductor. In the state where the faucet inductor is facing the transmission inductor, the battery can be wirelessly charged by transmitting the electric power from the transmission inductor to the faucet inductor in a magnetic induction manner while the built-in band of the battery is stationary.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless charging type battery, and a system for wirelessly charging the built-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless charging technique, and more particularly, to a wireless charging rechargeable battery built-in band that can be used as an auxiliary power source for a wearable device and a system capable of wirelessly charging the same.

The smartphone market, which has seen explosive growth, is now mature, and wearable devices are considered to be the next generation of mobile technology that is expected to complement or replace smartphones in the future. A wearable device refers to a device capable of attaching to a body and performing a computing action. Recently, performance improvement and diversification of wearable devices are rapidly progressing. As a result, the power consumption during the operation of the device is also increasing. In response, the importance of techniques for more efficiently optimizing the duration of batteries for wearable appliances is increasing.

Since the wearable device is basically worn on the human body, a small size and light weight are advantageous for satisfying users. There are various restrictions on the shape and shape of the device. These points are limited in size and capacity of the battery built in the body of the wearable apparatus. There is a need for an auxiliary battery to compensate for a shortage of the capacity of the battery built in the body of the wearable device.

For example, a smart watch to be worn on the wrist, a healthcare device to be worn on the wrist, arm, leg or neck (hereinafter collectively referred to as a wearable device). It is desirable that these wearable devices are minimized in size and weight in order to be worn on a specific body part and carried easily. In order to satisfy such a demand, there is a limitation in ensuring a sufficient use time only by the capacity of the battery built in the main body of these devices. A design that ensures a sufficient battery capacity is required.

As a conventional battery charging method of a wearable device, there is a wire charging method in which a power source and a battery are connected to each other through a terminal. This method is inconvenient to use and may cause problems such as connector damage due to frequent charging. As an alternative to this, there is a wireless charging method in which a coil is mounted on the back surface of the wearable device body and the charging device is charged with the coil. Such a wireless charging method has a limitation on the size of the battery, the efficiency may be limited depending on the surface area of the main body, and electromagnetic interference (EMI) or noise may affect the circuit inside the clock.

The present invention relates to a wearable device which is combined with a body of a wearable device and incorporates a flexible auxiliary battery which can be charged wirelessly into a band to be worn on a body part such as a wrist, an arm, a leg or a neck, And to provide a rechargeable battery built-in band.

The present invention is also intended to provide a wireless charging platform for charging such a wireless charging type battery built-in band and a wireless charging system of the wireless charging type battery built-in band systemized by both.

According to an embodiment of the present invention, there is provided a portable electronic device including: a flexible band detachably attachable to a body of a portable electronic device, the flexible band being attachable to a part of a body; A power receiving inductor in which an alternating current is induced by an external time-varying magnetic field passing through the dielectric layer, a power receiving inductor disposed in a plane on the magnetic shielding layer in the form of a wire loop, A rectifier connected to the inductor for rectifying an alternating current induced in the inductor to a direct current and a battery for charging the direct current outputted from the rectifying part to charge the electric power wirelessly transmitted through the time- And a built-in wireless rechargeable battery. The magnetic field shielding layer, the power receiving inductor, and the battery portion have flexibility corresponding to the flexible band so as not to be damaged by the flexure of the flexible band.

According to an embodiment of the wirelessly-charged type battery built-in band, the magnetic-field shielding layer may include a ferrite layer or a conductive material layer covering the predetermined area.

According to an embodiment of the present invention, the magnetic field shielding layer includes a conductive material layer covering the predetermined region, and a ferrite layer stacked on the conductive material layer and disposed under the receiving inductor .

According to an embodiment of the wirelessly-charged type battery built-in band, the power receiving inductor and the battery unit may be disposed on opposite sides of the magnetic shield layer to form a vertically stacked structure.

According to an embodiment of the wirelessly-charged type battery built-in band, the power receiving inductor is disposed next to the battery unit and the rectifying unit and may have a non-overlapping arrangement relationship.

According to another embodiment of the present invention, there is provided a wireless charging system of a wireless charging type battery built-in band and a wireless charging type battery built-in band having a wireless charging platform. The wirelessly-charged type battery-incorporated band may include a flexible band that can be detachably coupled to a main body of the portable electronic device and can be worn on a part of the body, and a flexible band including a predetermined area inside the flexible band A power receiving inductor having a built-in magnetic field shielding layer, a power receiving inductor disposed in a planar fashion on the magnetic shielding layer in a conductor loop shape and inducing an alternating current by an external time-varying magnetic field passing therethrough, A rectifying unit for rectifying an alternating current induced in the inductor to a direct current, and a battery unit for charging the direct current outputted from the rectifying unit. Wherein the wireless charging platform includes a holder for holding the wirelessly-charged battery built-in band for charging, a DC power supply for providing DC power, an inverter for converting a DC current applied from the DC power supply to an AC current, And a transmission inductor which is built in the mount and generates a time-varying magnetic field when an alternating current outputted from the inverter flows. Wherein the time-varying magnetic field generated by the transmission inductor in a state where the wirelessly-charged battery built-in band is mounted on the mount so that the power reception inductor faces the power transmission inductor, Thereby wirelessly charging the battery unit by transmitting power wirelessly to the power receiving inductor.

According to an embodiment of the wireless charging system of the wireless charging type internal band, the charging base provides a mounting surface capable of simultaneously charging a plurality of the wireless charging type internal bands and wirelessly charging the wireless charging type internal charging bands, The wireless charging can be performed regardless of the position, as long as the wirelessly-charged battery built-in band is placed in the stationary surface, including a single wire loop that generates a magnetic flux that goes out through the whole.

According to an embodiment of the wireless charging system of the wireless charging type internal band, the charging base provides a mounting surface capable of simultaneously charging a plurality of the wireless charging type internal bands and wirelessly charging the wireless charging type internal charging bands, And a plurality of wire loops spaced apart from each other on a lower surface of the stationary surface, and the wireless rechargeable battery internal bands may be placed on the plurality of wire loops.

According to an embodiment of the present invention, the cradle includes a band holder for holding the wirelessly-charged battery built-in band to maintain its wrapped state, And a main body holder for accommodating the main body in a state in which the main body is partially inserted so that the main body can be automatically aligned while facing the power transmission inductor.

According to an embodiment of the wireless charging system of the wireless rechargeable battery internal band, the magnetic field shielding layer may be disposed in the band holder so as to cover the transmission inductor from the rear.

According to an embodiment of the present invention, the magnetic field shielding layer, the dielectric layer, and the battery unit may be formed of a flexible material, such as a flexible material, corresponding to flexibility of the band so as not to be damaged by bending of the flexible band. You can have sex.

According to an embodiment of the present invention, the magnetic shielding layer includes (i) a ferrite layer covering the predetermined region, (iii) a conductive material layer, and (iii) A ferrite layer sequentially stacked below and a double layer of a conductive material layer.

According to an embodiment of the wireless charging system of the wireless rechargeable battery internal band, the portable electronic device may be a smart watch having wireless communication and computing functions.

According to an embodiment of the present invention, the wireless charging platform may further include a first resistor and a second capacitor connected to the transmission inductor to configure a transmission-side resonant circuit, The wireless rechargeable battery built-in band further includes a second resistor and a second capacitor connected to the receiving inductor to form an emitter-side resonant circuit, thereby maximizing power transmission through a resonance method by minimizing impedance.

According to the present invention, a wireless power transmission system is applied to a wearable electronic band such as a smart watch, so that a user purchases a plurality of bands and the battery-exhausted band is separated from the electronic device and wirelessly charged in the wireless charging platform have. The wearable electronic device can be used continuously by connecting the pre-charged band to the wearable electronic device during the charging. Therefore, the time required for the user to unpack the wearable electronic device and charge the wearable electronic device is reduced, and the wearable time is increased.

In addition, a wireless charging function is mounted on a band that can be worn on the body, such as a wrist, so that it is possible to solve the problem of incapability of charging due to damage of a connector terminal to be connected when wired.

It is possible to minimize leakage magnetic flux and improve the efficiency of power transmission by covering the inductor for wireless transmission / reception of power with the magnetic shielding layer.

In addition, the magnetic shielding layer, the power receiving inductor, and the battery section have flexibility that the flexible band can flex together without being damaged when the wheel is wound, and therefore, it has characteristics suitable for a wearable electronic device.

In addition, it is possible to charge using a radio resonance method, thereby achieving a high power transmission efficiency.

FIG. 1 is a cross-sectional view of a wireless-rechargeable battery built-in band according to an embodiment of the present invention,
FIG. 2 is a plan view of the internal band of the battery shown in FIG. 1, with the upper part of the band removed,
3 is a cross-sectional view of a wirelessly-charged battery built-in band according to another embodiment of the present invention,
FIG. 4 is a plan view of the internal band of the battery shown in FIG. 3,
FIG. 5 illustrates a multiple wireless charging platform for simultaneously charging a plurality of battery built-in bands according to an embodiment of the present invention,
Figure 6 illustrates the placement relationship between a single transmission inductor and a plurality of faucet inductors in a multiple wireless charging platform in Figure 5,
FIG. 7 shows a state in which a magnetic flux generated in a single transmission inductor is interlinked with a plurality of receiving inductors in the arrangement relationship of FIG. 6,
Figure 8 illustrates a single wireless charging platform for charging one internal battery band in accordance with another embodiment of the present invention,
9 is an electric circuit diagram of a battery built-in band wireless charging system according to an embodiment of the present invention,
FIG. 10 shows a state in which a smart watch using a wireless-rechargeable battery built-in band according to an embodiment of the present invention is mounted on a wireless charging platform for wireless charging,
11 shows the structure of the wireless charging platform for smart watch of FIG.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprise", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be construed as meaning consistent with meaning in the context of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the construction of a wirelessly-charged type internal battery band 10 according to a first embodiment of the present invention.

The battery built-in band 10 includes a flexible band 12 that can be worn on a particular body part such as the wrist, arm, or leg or neck. The flexible band 12 may be made of a nonconductive material such as leather, synthetic resin, rubber, fiber material, and the like.

A battery 14, an electric power supply inductor 16, and a rectifier 20 are built in the flexible band 12. In addition, a magnetic shielding layer 18 may be further disposed inside the flexible band 12 so as to cover the predetermined area.

The magnetic shielding layer 18 may be formed to cover the predetermined region with a high permeability ferrite material or a conductive material, for example. The ferrite material and the conductive material can be formed, for example, in the form of a sheet. The magnetic-field shielding layer 18 may also be formed by vertically stacking a ferrite layer and a conductive material layer.

On the magnetic field shielding layer 18, a faucet inductor 16 is disposed. The power receiving inductor 16 is stacked on the magnetic shield layer 18 in a predetermined area inside the flexible band 12 in the form of a wire loop, that is, spirally formed in a planar manner as illustrated in FIG.

A rectifying part 20 and a battery 14 are disposed inside the flexible band 12 beside the power receiving inductor 16 and the magnetic field shielding layer 18. The rectifying unit 20 includes a rectifier circuit connected to both ends of the power receiving inductor 16 to convert AC power into direct current and a rectifier circuit connected to the output terminal of the rectifier circuit for converting the level of the rectified DC voltage to a voltage Level regulator circuit. The rectifier and the regulator circuit can be packaged together. The rectifying part 20 and the battery 14 may be arranged vertically or arranged side by side as shown.

The battery 14, the power reception inductor 16, and the magnetic shielding layer 18 are embedded in the flexible flexible band 12, and they are also preferably flexible. If they are not flexed flexibly in accordance with the bending of the flexible band 12, inconveniences may arise in use and the risk of breakage or cutting may increase. Therefore, it is preferable that the battery 14 is constructed using a flexible battery, and the faucet inductor 16 is also constructed using flexible leads. It is also preferable that the ferrite layer and / or the conductive material layer constituting the magnetic-field shielding layer 18 have flexibility. Of course, the rectifying section 20 may be configured to have flexibility.

The flexible band 12 is further provided with an engaging portion (not shown) for engaging with the body in which it is used, a fastening portion (not shown) capable of permitting a spacing adjustment between the flexible bands 12 fastened to the right and left of the body . In addition, the battery 14 may further include a connector (not shown) connected to the main body so as to charge the battery built in the main body.

3 and 4 show the configuration of the wirelessly-charged type battery built-in band 30 according to the second embodiment of the present invention.

The battery built-in band 30 is provided with a flexible band 32, a battery 34, a power receiving inductor 36, a magnetic field shielding layer 38 and a rectifying section 40. In comparison with the first embodiment, And the roles and functions of the respective components are substantially the same as those of the first embodiment. However, there is a difference in their arrangement (in particular, the area of the faucet inductor 36 of the second embodiment is relatively narrow compared with that of the faucet inductor 16 of the first embodiment). Due to the difference, The second embodiment is for low frequency charging and is suitable for charging close from the transmission source, while it is for high frequency charging and can be charged remotely from the transmission source.

In the case of the battery built-in band 30 according to the second embodiment, the faucet 34 and the faucet 34 are stacked in a vertical relationship. A magnetic shielding layer 38 is interposed therebetween. The rectifying section 40 is disposed next to the battery 34 and the faucet inductor 36. All of these components are embedded in the band 32, and the function and mutual connection relation of each of the components are substantially the same as in the first embodiment. While the faucet inductor 16 of the first embodiment occupies a considerably large area, the faucet inductor 36 of the second embodiment occupies a small area.

FIG. 5 illustrates a multiple wireless charging platform 70 in accordance with an embodiment of the present invention. The multiple wireless charging platform 70 includes a cradle 72 on which a plurality of battery built-in bands 10 or 30 can be placed together and a base 72 that supports the cradle 72 and incorporates means for wireless power transmission 73). Although the holder 72 is shown in a curved shape, the shape of the holder 72 is not necessarily limited to a curved shape, and any shape can be used as long as it can stably mount the battery built-in bands 10 or 30.

Transmission inductors for wireless power transmission are built in the holder 72. The transmission inductor may be one or more. When a plurality of power transmission inductors are disposed, a plurality of power receiving inductors 10 or 30 may be placed on the plurality of power transmission inductors one by one correspondingly and charged.

6 illustrates the arrangement relationship between the single transmission inductor 74 and the plurality of the faucet inductors 10 when one transmission inductor 74 is disposed inside the cradle 72. As shown in Fig. FIG. 7 shows a state in which the magnetic flux generated in the single transmission inductor 74 is interlinked with the plurality of the plurality of the receiving inductors 10a, 10b, and 10c in the arrangement relationship of FIG. 6 and 7, when the battery built-in bands 10a, 10b, and 10c are placed on the cradle 72, each of the power receiving inductors 10a, 10b, and 10c is connected to a single power transmission inductor 74 are arranged so as to bridge the magnetic flux generated by the magnetic flux generating element 74 as much as possible.

The wireless charging platform may be configured as a single wireless charging platform 80 capable of charging and charging wirelessly with only one battery built-in band 30 as illustrated in FIG. This single type wireless charging platform 80 includes a base 82 on which one of the battery built-in bands 30 can be placed and a base 83 for supporting the base 82 with the support for the wireless power transmission . A transmission inductor 84 is embedded below the mount 82. The shape and size of the transmission inductor 84 may be substantially the same as that of the power reception inductor 36. [

9 shows a configuration of a wireless charging system 50 according to the present invention. The wireless charging system (50) includes a multiple wireless charging platform (70) and at least one internal battery band (10). A single wireless charging platform 80 may be included instead of multiple wireless charging platforms 70.

The multiple wireless charging platform 70 includes a DC input unit 52 for providing a DC current, an inverter 54 for converting the DC current output from the DC input unit 52 into an AC current, an AC current output from the output terminal of the inverter 54 And a wireless transmitting unit 56 that wirelessly transmits power by flowing Is.

The radio transmission unit 56 includes a transmission inductor 74 Ls. The wireless transmission unit 56 may further include a resistor Rs and a capacitor Cs connected to the transmission inductor Ls and constituting a transmission-side resonance circuit.

The battery built-in band 10 includes a radio receiver 62 for receiving electric power for radio transmission in the radio transmitter 56 and a rectifier for rectifying the AC current outputted from the output terminal of the radio receiver 62 into a direct current 20, and a battery 14 for charging a direct current output from the output terminal of the rectifying unit 20.

The wireless power receiver 62 includes the faucet inductor 16 Lr. Further, the wireless power receiver 62 may further include a capacitor Cr connected to the power reception inductor 16 Lr to configure the power reception side resonance circuit.

The rectifying unit 20 includes a rectifier circuit 64 connected to both ends of the radio receiver 62 to rectify an alternating current into a direct current and a rectifier circuit 64 connected to the output terminal of the rectifier circuit 64, And a regulator 66 for adjusting the level of the battery 14 to a voltage level suitable for charging the battery 14. [

9 shows the multiple wireless charging platform 70 and the wirelessly-charged internal battery band 10 according to the first embodiment, but this is merely exemplary. The combination of the single wireless charging platform 80 and the wirelessly-charged battery built-in band 30 according to the second embodiment can also be represented by the circuit of FIG.

The circuit of the wireless charging system of Fig. 9 operates as follows. For wireless charging, the inverter 54 converts the direct current output from the direct current input unit 52 into an alternating current and provides it to the wireless transmission unit 56. As a result, an AC current flows through the transmission inductor 74 and a time-varying magnetic field is generated around the AC current. This time-varying magnetic field is linked to the faucet inductor 16 of the wirelessly-charged battery built-in band 10 mounted on the holder 72 of the wireless charging platform 70. Thus, an electromotive force is induced in the power receiving inductor 16, so that an alternating current flows. Thus, power can be wirelessly transmitted from the wireless transmission unit 56 to the wireless power receiver 62 in a magnetic field induction manner.

At this time, the ferrite material of the magnetic field shielding layer 18 converges the magnetic flux such that the magnetic flux radiated from the transmission inductor 74 flows into the receiving inductor 16 as much as possible, and the magnetic flux radiated from the receiving inductor 16 flows to the outside To minimize radiation. The magnetic field radiated from the transmission inductor 74 is concentrated as much as possible in the power reception inductor 16 so as to minimize the leakage magnetic flux and increase the inductance of the power reception inductor 16 so that the power transmission from the power transmission inductor 74 to the power reception inductor 16 Thereby enhancing transmission efficiency. The conductive material layer of the magnetic-field shielding layer 18 can prevent the magnetic field of the power transmission inductor from escaping out of the power reception inductor 16 to prevent deterioration of the power transmission efficiency.

The alternating current that is induced in the wireless power receiver 62 is input to the rectifier circuit 64 of the rectifying unit 20 and is rectified to the DC and then supplied to the regulator circuit 66. The regulator circuit 66 converts the input DC The battery 14 is adjusted to a voltage suitable for charging and supplied to the battery 14. [ Whereby the battery 14 is charged. The wireless charging platform 70 can wirelessly charge the batteries 14 in the flexible band 12 in a magnetic field induction manner.

In the wirelessly-charged battery built-in band 10 according to the first embodiment, the area occupied by the faucet inductor 16 is relatively wide. In the case of this wirelessly-charged internal battery band 10, a high resonance frequency can be used to supplement the Q-factor. The faucet inductor 16 can be disposed further from the transmission inductor 74. [ In addition, the multiple wireless charging platform 70 can simultaneously charge several wirelessly-charged battery built-in bands 10 using resonance.

The area occupied by the power receiving inductor 36 is relatively narrow in the wirelessly-charged type battery built-in band 30 according to the second embodiment. This wirelessly-charged type battery built-in band 30 can use a low resonance frequency. The faucet inductor 36 can be positioned close to the transmission inductor 74 and can be charged wirelessly with high efficiency.

 10 shows a state in which the smart watch 100 using the wirelessly-charged type battery built-in band 10 or 30 according to the embodiment of the present invention is mounted on the wireless charging platform 200 for wireless charging. 11 shows the configuration of the wireless charging platform 200 for the smart watch 100. In FIG.

The smart watch 100 includes a smart watch body 110 and a wrist strap connected to both sides of the body 110, i.e., a wirelessly-charged battery built-in band 10 or 30. A main battery (not shown) is built in the main body 110. The batteries 14 and 34 incorporated in the wirelessly-charged type battery built-in band 10 or 30 can be used as an auxiliary battery for charging the main battery.

The wireless charging platform 200 is provided with a holder for mounting the wirelessly-charged battery built-in band 10 or 30 in a state suitable for wireless charging. The stand includes a smart watch band holder 220 for holding the wirelessly-rechargeable battery built-in band 10 or 30 to maintain its wrapped state, a wirelessly-rechargeable battery built-in band 10 or 30 and a smart watch body 110 A smart watch body holder (not shown) which allows the receptacle inlets 16 or 36 to be aligned automatically while facing the transmission inductors 74 or 84 210).

The smart watch body holder 210 includes a base 212 for supporting the smart watch band holder 220 underneath. A main body insertion groove 214 is provided on one side of the upper surface of the base 212 to accommodate a part of the smart watch body 110. The base 212 has a built-in wireless charging means such as a DC input unit 52, an inverter 54 and a wireless transmission unit 56. The base 212 has a built- A slot 216 is provided.

The smart watch band holder 220 includes a protrusion 222 that protrudes upwardly from the upper surface of the base 212 so as to be wound with the smart watch 100. A band insertion groove 224 is provided around the boundary line between the upper surface of the base 212 and the protrusion 222.

A passage 228 is provided in the protrusion 222 along the side wall and a transmission inductor 74 or 84 is disposed in the passage 228 in parallel with the side wall of the protrusion 222. The passage 228 is provided with a magnetic shielding layer 226 disposed in the form of covering the transmission inductor 74 or 84 from the back side, that is, on the side closer to the central portion of the protrusion 222 in parallel with the transmission inductor 74 or 84 .

The band 10 or 30 of the smart watch 100 is inserted into the insertion groove 214 and the band 10 or 30 is inserted into the insertion slot 224 of the smart watch 100, ) Of the band 10 or 30 can be automatically aligned while facing the transmission inductor 74 or 84 in close proximity. In this state, leakage of the magnetic flux generated by the transmission inductor (74 or 84) can be minimized and the efficiency of wireless power transmission is high.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. You will understand.

The present invention can be used for wireless power transmission. It can also be used in the implementation of an auxiliary power source for a wearable device such as a smart watch.

10, 30: Wireless rechargeable battery built-in bands 12, 32: Body wearable band
14, 34: Batteries 16, 36: Fault inductor (lead wire loop)
18, 38: magnetic field shielding layer 20, 40:
52: DC input unit 54: Inverter
56: wireless transmission unit 62: wireless reception unit
64: rectifier 66: regulator
70: Multiple wireless charging platform 72, 82: Cradle
74: Transmission inductor 80: Single type wireless charging platform
100: Smart Watch 110: Smart Watch Body
200: Wireless charging platform 210: Smart watch body holder
212: base 214: body insertion groove
220: Smart watch band holder 222: Projection
224: band insertion groove 226: magnetic field shielding layer
228: passage

Claims (14)

delete delete delete delete delete A wireless rechargeable battery built-in band, and a wireless recharging platform,
Wherein the wireless rechargeable battery built-
A flexible band detachably attachable to a body of the portable electronic device, the flexible band being worn on a part of the body;
A magnetic field shielding layer embedded in the flexible band to cover a predetermined area;
A dielectric layer formed on the magnetic shield layer in a wire loop shape, the dielectric layer having an outer surface and an inner surface;
A rectifying part connected to the receiving inductor and rectifying an AC current induced in the receiving inductor to a DC current; And
And a battery unit for charging a direct current output from the rectifying unit,
The wireless charging platform includes:
A holder for mounting the wirelessly-charged battery built-in band for charging;
A DC power supply unit for providing DC power;
An inverter for converting a direct current applied from the direct current power supply unit into an alternating current; And
And a transmission inductor built in the mount and generating a time-varying magnetic field when an alternating current outputted from the inverter flows,
Wherein the time-varying magnetic field generated by the transmission inductor is transmitted through the power reception inductor to the power reception inductor in a state where the power reception inductor is opposed to the power transmission inductor, Thereby charging the battery unit wirelessly,
Wherein the holder comprises a band holder for holding the wireless rechargeable battery built-in band to hold the recharged battery built-in band in a state where the body is partially inserted in the state where the wireless rechargeable battery built- And a body holder for allowing the faucet inductor to be automatically aligned while facing the transmission inductor. 7. The apparatus of claim 6, wherein the cradle is provided with a mounting surface on which a plurality of the wirelessly-charged battery internal bands are placed together and can be wirelessly charged at the same time, and the transmission inductor Wherein the wireless charging is performed regardless of the position, as long as the wireless-rechargeable battery built-in band is installed in the stationary surface including the wire loop. [7] The apparatus of claim 6, wherein the cradle provides a mounting surface capable of simultaneously charging a plurality of the wirelessly-embedded battery internal bands and wirelessly charging the same, wherein the transmission inductor includes a plurality of wire loops spaced apart from each other below the mounting surface Wherein each of the plurality of wire loops is capable of simultaneously charging the wireless rechargeable battery built-in bands with the wireless rechargeable battery built-in bands, and wirelessly charging the wireless rechargeable battery built-in bands. delete The wireless charging system of claim 6, further comprising a magnetic shielding layer disposed inside the band holder to cover the transmission inductor from the backside. The wireless rechargeable battery according to claim 6, wherein the magnetic shielding layer, the power receiving inductor, and the battery unit have flexibility corresponding to flexibility of the band so as not to be damaged by bending of the flexible band. The band's wireless charging system. 7. The method of claim 6, wherein the magnetic shield layer comprises: (i) a ferrite layer covering the predetermined area; (iii) a conductive material layer; and (iii) a ferrite layer sequentially stacked below the dielectric layer, Wherein the at least one of the first and second battery packs comprises a first battery pack and a second battery pack. The wireless charging system of claim 6, wherein the portable electronic device is a smart watch having wireless communication and a computing function. [7] The method of claim 6, wherein the wireless charging platform further includes a first resistor and a second capacitor that are connected to the transmission inductor and constitute a power transmission side resonant circuit, to enable maximum power transmission through a resonance method through impedance minimization Wherein the wireless rechargeable battery built-in band further comprises a second resistor and a second capacitor connected to the receiving inductor to constitute a receiving-side resonant circuit.

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