KR20160140473A - Wireless power transfer module and portable auxiliary battery including the same - Google Patents

Abstract

Provided are a wireless power transmitting module and a portable auxiliary battery including the same. According to an embodiment of the present invention, the wireless power transmitting module includes: an antenna module including at least one wireless power transmission antenna comprising flat coils; and a shield unit placed on a side of the antenna unit to shield a magnetic field. The wireless power transmission antenna includes: a body formed by winding a conductive member, having a predetermined length, on the same plane a plurality of times; a first length part including a first lead part extended from a central part of the body to the outside of the body, and a first terminal part installed at an end of the first lead part; and a second length part including a second lead part extended from a side part of the body to the outside, and a second terminal part installed at an end of the second lead part. The first lead part includes a first part having at least one part overlappingly attached to a side of the body. The first part has a thinner thickness than the thickness of the conductive member not overlapped with the first part.

Description

Technical Field [0001] The present invention relates to a wireless power transfer module and a portable auxiliary battery including the wireless power transfer module,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless power transmission module and a portable auxiliary battery including the wireless power transmission module, and more particularly, to a wireless power transmission module and a portable auxiliary battery including the wireless power transmission module.

The portable terminal has a wireless charging function for wirelessly charging a built-in battery. The wireless charging includes a wireless power receiving module built in the portable terminal and a wireless power transmitting module for supplying power to the wireless power receiving module Lt; / RTI >

In recent years, as the portable terminal has become smaller and thinner, the thickness of the wireless power receiving module built in the portable terminal is also becoming thinner, and the entire thickness of the wireless power receiving module may be designed to be less than 2 mm.

However, when the thickness of the wireless power receiving module is designed to be 2 mm or less, it is difficult to realize the characteristics required in the wireless charging method. That is, when the antenna unit includes several antennas serving different roles, it is necessary to use sheets having different characteristics in order to improve the performance of the antenna. Thereby, the shielding unit can not necessarily be made up of a plurality of sheet layers, which has a limitation in reducing the overall thickness of the shielding unit.

As a result, in order to reduce the thickness of the wireless power receiving module to 2 mm or less, it is necessary to reduce the thickness of the antenna unit in addition to the thickness of the shielding unit.

 However, when the antenna is constituted by a plate-type coil, there is a limit to reduce the thickness of the antenna unit because the lead for electrical connection has to be overlapped on one surface of the plate-like coil.

That is, when the antenna is formed of a flat coil, the total thickness of the coil and the lead portion of the coil is twice the coil diameter, resulting in a total thickness of the wireless power receiving module of 2 mm or more. Accordingly, there is a demand for a method for reducing the overall thickness of the wireless power receiving module, which is a part of the wireless power transmitting module.

Meanwhile, as the power consumption of the portable terminal increases, an auxiliary battery is produced and sold as a method for increasing the battery usage time of the portable terminal.

However, most of the portable auxiliary batteries use a separate charging cable to charge the battery of the portable terminal or to charge the power of the portable terminal. Therefore, there is a need to carry a separate charging cable at all times.

KR 10-2013-0119585 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless power transmission module capable of designing a total thickness of a wireless power transmission module to 2 mm or less without reducing the size of the wireless power transmission module .

It is another object of the present invention to provide a portable auxiliary battery which can easily charge a battery of a portable electronic device or can charge its own power by charging or discharging using a wireless charging method.

According to an aspect of the present invention, there is provided an antenna unit including at least one antenna for wireless power transmission, the antenna unit comprising a flat coil. And a shielding unit disposed on one surface of the antenna unit and shielding a magnetic field, wherein the antenna for wireless power transmission comprises: a body having a plurality of turns on a same plane as a conductive member having a predetermined length; A first length portion including a first lead portion extending from the central portion of the body to the outside of the body and a first terminal portion provided at an end of the first lead portion; And a second length portion including a second lead portion extending outward from a side portion of the body and a second terminal portion provided at an end portion of the second lead portion, Wherein the first portion has a thickness that is less than a thickness of the conductive member that is not overlapped with the first portion of the body.

The first portion is disposed in close contact with one surface of the body from the central portion of the body to the outside of the body, and the first lead portion includes a second portion extending a predetermined length outward from the end of the first portion .

The first length portion may have a thickness that is smaller than a thickness of the conductive member that does not overlap the first portion of the body by pressing only the length corresponding to the first portion.

The first length part may be disposed on one side of the body so that the first part overlaps the first part and then the first part and the body are simultaneously pressed so that the first part is longer than the thickness of the conductive part where the first part does not overlap A wireless power transmission module with a thin thickness.

In addition, a seating groove may be formed on one surface of the body corresponding to the first portion, the recess being formed in a predetermined depth.

In addition, the first portion may be formed in an elliptical shape having a major axis and a minor axis.

Further, the first portion may be pressed to have a thickness of 60% to 95% of the thickness before being pressed.

Also, the first portion is pressed to have a thickness of 60% to 95% with respect to the thickness before being pressed, and the conductive member constituting the body corresponding to the region corresponding to the first portion is pressed to a thickness of 60 % To < RTI ID = 0.0 > 95%. ≪ / RTI >

In addition, the shielding unit may include a receiving portion for disposing the first length portion in an area corresponding to the first length.

In addition, the receiving portion may be a receiving recess formed at a predetermined depth from one surface of the shielding unit.

In addition, the receiving portion may be provided as a cut-out portion having a predetermined length incision inward from the rim of the shielding unit.

In addition, the antenna unit may further include at least one of an MST antenna and an NFC antenna.

According to another aspect of the present invention, there is provided a portable auxiliary battery including at least one battery, wherein the wireless power transmission module is provided as a wireless power receiving module so as to receive wireless power from the charging device to charge the battery, A receiving unit disposed in the receiving unit; And a transmission unit, which is provided on the other side of the battery and is equipped with the wireless power transmission module as the wireless power transmission module so that the power stored in the battery can be transmitted to the portable electronic device to charge the main battery of the portable electronic device can do.

As another embodiment, the present invention provides a portable auxiliary battery including at least one battery, wherein the wireless power transmission module is provided as a wireless power receiving module and receives wireless power transmitted from the charging device, ; And a charging port unit for supplying power stored in the battery to the portable electronic device through a charging cable.

As another embodiment, the present invention provides a portable auxiliary battery including at least one battery, wherein the wireless power transmission module is provided as a wireless power transmission module to transmit power stored in the battery to the portable electronic device, A transmitter for charging the main battery of the device; And a charging port portion for supplying power stored in the charger to the battery through the charging cable.

According to the present invention, the thickness of the first lead portion overlapping the body of the flat coil is made thinner than the thickness of the conductive member constituting the body without overlapping with the first lead portion, thereby reducing the size of the wireless power transmission module Thinning can be implemented without. As a result, the total thickness of the wireless power transmission module can be designed to be very thin, even less than 2 mm.

In addition, according to the portable auxiliary battery of the present invention, it is possible to easily charge the self-battery or charge the main battery of the portable electronic device through a wireless system.

1 is a block diagram of a wireless power transmission module according to an embodiment of the present invention;
FIG. 2 is a sectional view of FIG. 1,
3 is a view showing an antenna unit applied to the present invention,
4 is an enlarged view of a first part of an antenna unit applied to the present invention,
5 is a view showing another type of antenna unit applied to the present invention,
6 is a view showing another form of the shielding unit applied to the present invention,
7 is a diagram illustrating a plurality of antennas for wireless power transmission in a wireless power transmission module according to an embodiment of the present invention;
8 is a diagram illustrating a case where an antenna unit of the wireless power transmission module according to an embodiment of the present invention includes a plurality of antennas that perform different roles;
9 is a cross-sectional view illustrating an example of a shielding unit of a wireless power transmission module according to an embodiment of the present invention,
10 is a view illustrating another embodiment of a shielding unit applied to a wireless power transmission module according to an embodiment of the present invention;
FIG. 11 is a view illustrating a case where a shielding unit applied to a wireless power transmission module according to an embodiment of the present invention is composed of multiple layers. FIG.
12 is a diagram illustrating a case where the wireless power transmission module according to the present invention is applied to a receiver and a transmitter of a portable auxiliary battery,
13 is a sectional view of Fig. 12,
14 and 15 are views showing a case where the wireless power transmission module according to the present invention is applied to a receiver of a portable auxiliary battery,
16 and 17 are views showing a case where the wireless power transmission module according to the present invention is applied as a transmitter of a portable auxiliary battery.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

The wireless power transmission module 100 according to an embodiment of the present invention includes an antenna unit and a shielding unit 120, as shown in FIG.

The antenna unit may include at least one antenna using a predetermined frequency band, and is for performing a predetermined function using the frequency band.

The antenna unit may include a plurality of antennas that perform different roles, and may be fixed to one surface of the shielding unit 120 through an adhesive layer.

Such an antenna unit may be configured in a different manner from a portion that serves as an antenna that generates power for charging or discharging a wireless power signal and charging the battery in a wireless manner.

That is, the antenna unit includes at least one antenna 110a for wireless power transfer for transmitting or receiving wireless power, and the antenna for wireless power transmission 110a, And at least one other antenna 110b, 110c using a different frequency band from the antenna 110a.

For example, the other antennas 110b and 110c may be an antenna 110b for an MST (Magnetic Secure Transmission) or an antenna 110c for an NFC (Near Field Communicatino), and the antenna unit may include an antenna 110b for MST, And an NFC antenna 110c (see FIG. 8).

Here, the antenna 110a for wireless power transmission transmits a wireless power signal to the electronic device and transmits the wireless power transmission signal to the transmitter coil 110a for wirelessly charging the main battery of the portable electronic device using an inductive coupling method or a self- (Tx coil), receives a wireless power signal transmitted from an external charging device, and generates a reception coil for charging the battery of the portable electronic device using an inductive coupling method based on the electromagnetic induction phenomenon or a self-resonance method Rx coil).

In addition, an MST antenna 110b and a wireless power transmission antenna 110a may be disposed inside the NFC antenna 110c.

However, the positions of the NFC antenna 110c, the MST antenna 110b, and the wireless power transmission antenna 110a are not limited thereto, and it is noted that the arrangement relationship can be appropriately changed according to the design conditions .

Meanwhile, when the antenna unit is applied to a wireless power transmission module, the antenna unit may be arranged such that three wireless power transmission antennas 110a are stacked on one surface of the shielding unit 120 (see FIG. 7) .

The antenna 110a for wireless power transmission according to the present invention may be a flat coil and may include a body 111, a first length 112 and a second length 113 .

The body 111 may be configured such that the conductive member having a predetermined length is wound a plurality of times on the same plane, and the conductive member may be wound clockwise or counterclockwise to form a circular, elliptical, spiral, And may be formed in a polygonal shape.

Here, the conductive member may be a conductive metal such as copper, and the conductive member may be formed of one strand having a predetermined thickness, and the plurality of strands may be twisted along the longitudinal direction.

The first and second lengths 112 and 113 may extend from the body 111 to a predetermined length.

That is, the first length portion 112 includes a first lead portion 114 protruding from the center of the body 111 to the outside of the body 111, and a second lead portion 114 protruding from the end of the first lead portion 114 And at least a part of the entire length of the first lead part 114 may be arranged to overlap the one surface of the body 111. [ The first terminal part 115 may be formed separately at the end of the first lead part 114 or may be a part of the first lead part 114.

At this time, at least a part of the first lead part 114 may be closely disposed so as to overlap from the central part of the body 111 to the outer side of the body 111.

The first lid portion 114 includes a first portion 116 which is disposed in close contact with one surface of the body 111 across the body 111 at a central portion of the body 111, And a second portion 117 that extends a certain distance outwardly from the end of the first portion 116.

At this time, as shown in FIG. 4, the first length portion 112 may be pressed so that the first portion 116 has a small thickness and closely contact with the body 111. Accordingly, the pressed thickness of the first portion 116 may be thinner than the thickness of the conductive member constituting the body 111.

4, the first portion 116 may be formed on one side of the body 111, and the first portion 116 may be formed on one side of the body 111, The first portion 116 and the body 111 may be pressed simultaneously (see FIG. 5). Accordingly, the seating groove 118 may be recessed at a predetermined depth in a region corresponding to the first portion 116 on one side of the body 111 where the first portion 116 is disposed. As a result, the overall thickness of the antenna 110a for wireless power transmission can be further reduced.

At this time, the first portion 116 may be pressed to have an elliptical shape having a major axis and a minor axis. This is to reduce the possibility of breakage by an external force applied at the time of pressing while reducing the overall thickness.

On the other hand, the first portion 116 and the body 111, which are formed of a conductive member having a predetermined wire diameter, should not be damaged so that the wireless power signal can be smoothly transmitted or received even if the thickness decreases due to the pressing.

That is, a part of the body 111 in which the first part 116 and the first part 116 are superposed is required to be pressed within a range that does not cause damage to the conductive member.

4, when the first portion 116 is pressed only, the thickness of the first portion 116 may be pressed to have a thickness of 60% to 95% with respect to the thickness before being pressed. have.

As another example, even when a part of the body 111 where the first part 116 and the first part 116 are overlapped is simultaneously pressed as shown in FIG. 5, the thickness of the first part 116 The thickness of the conductive member constituting the body 111 corresponding to the area corresponding to the first part 116 may be pressed to a thickness before being pressed, Can be pressed to have a thickness of 60% to 95% with respect to the thickness.

This is because when the thickness after pressing is pressed to a thickness of less than 60% of the original thickness, the coating coated on the surface of the conductive member may be damaged, resulting in insulation problems, and the thickness after pressing may be 95% The effect of thinning can be reduced.

Specifically, when a conductive member having a wire diameter of 1.15 mm is used to implement the antenna 110a for a wireless power transmission in the form of a flat plate coil, the thickness of the first portion 116 is pressurized to have a thickness of 0.69 mm to 1 mm And the thickness of the body 111 corresponding to the region corresponding to the first portion 116 may also be pressed to have a thickness of 0.69 mm to 1 mm.

Accordingly, the overall thickness of the body 111 in which the first portion 116 and the first portion 116 are overlapped can have a thickness of 1.4 mm to 2 mm, and the shielding sheet 120 and the wireless power transmission The overall thickness of the wireless power transmission module 100, which is the sum of the thickness of the antenna 110a for use, may be less than or equal to 2 mm, and may be, for example, 1.7 mm.

Here, the thickness of the first length portion 112 may be partially or wholly received through the receiving portions 123 and 124 formed in the shielding unit 120. Details of the accommodating portions 123 and 124 will be described later.

Accordingly, the wireless power transmission module 100 according to the present invention can reduce the thickness of 0.8 mm to 1 mm compared with the conventional wireless power transmission module 100, so that the wireless power transmission module 100 can be realized with a very thin thickness.

Using USTC 0.08? * 105 strand 17AWG conductive member, the change in characteristics before and after pressing was measured, and the results are shown in Table 1 below.

At this time, HIOKI IM3523 RLC Meter was used as the measurement equipment, and the measurement frequency was measured at 100 kHz.

Comparative Example 1 is a state in which a conductive member having a thickness of 2.1 is not pressed, Comparative Example 2 is a state in which a conductive member having a thickness of 2.11 is not pressed, Examples 1 to 4 are conductive members having a conductive thickness And the thickness is reduced by pressing the member.

As can be seen from Table 1, in the case of Examples 1 and 2, Ls (coil inductance) and Rs (frequency resistance) were obtained even when the conductive member having the original thickness of 2.1 mm was pressed to have a thickness of 60.5% or 61.9% ), Rdc (DC resistance) and Q are similar to those of Comparative Examples 1 and 2.

On the other hand, in the case of Examples 3 and 4, when the conductive member having the original thickness of 2.1 mm was pressed to have a thickness of less than 60% of the original thickness, Rs and Rdc were 1.5 to 2 It can be confirmed that Q is near 70 and below. That is, according to the measurement results of Examples 3 and 4, it can be confirmed that when the conductive member is pressed to have a thickness of less than 60% of the original thickness, damage occurs and normal operation can not be performed.

The results of measuring the charging efficiency when the wireless power transmission module 100 is implemented using the antenna 110a for wireless power transmission according to the present invention are shown in Table 2 below.

At this time, a power supply was used for the Aglient E3634A and a load was used for the PRODIGIT 3341G. The results are shown in Tables 2 and 3 below.

Here, in Comparative Example 1 and Comparative Example 2, a conductive member having a thickness of 2.1 and 2.11 was implemented as a wireless power transmission antenna 110a in a non-pressurized state. In Examples 1 and 2, And the charging efficiency was measured in a state where the thickness of the first portion was pressed to have a thickness of 60.5% and 61.9%, respectively, with respect to the original thickness.

As can be seen from Tables 2 and 3, the efficiencies of Examples 1 and 2 are similar to those of Comparative Examples 1 and 2.

As a result, even when the first portion 116 of the antenna 110a is pressurized so as to have a thickness of 60% to 95% with respect to the thickness before being pressed, the function as the antenna can be smoothly performed, The overall thickness of the transmission antenna 110a can be reduced, and the overall thickness of the wireless power transmission module 100 can be thinned.

 The shielding unit 120 disposed on one surface of the antenna unit includes receiving portions 123 and 124 for receiving a part or the entire thickness of the first length 112 in a region corresponding to the first length 112 May be formed.

For example, the receiving portion may be a receiving groove 123 (see FIG. 2) formed at a predetermined depth from one surface of the shielding unit 120, and a lengthwise incision is formed inward from the rim of the shielding unit 120 And may be an incision 124 (see FIG. 6).

The receiving groove 123 or the cutout portion 124 may receive only the second portion 117 of the first length portion 112 and may receive the first portion 116 together with the second portion 117, Or a shape in which a part or the entire thickness of the body 111 is accommodated.

The second length portion 113 includes a second lead portion 119 protruding outward from a side of the body 111 and a second terminal portion 119a provided at an end of the second lead portion 119 .

The second terminal portion 119a may be formed separately at the end of the second lead portion 119 or may be a portion of the second lead portion 119. [ The first terminal portion 115 of the first length portion 112 and the second terminal portion 119a of the second length portion 113 may serve as input and output terminals of a power source supplied from the outside .

The shielding unit 120 may enhance the performance of a corresponding antenna operating in a predetermined frequency band by shielding the magnetic field generated by the antenna unit to increase the magnetic field collection rate.

For this, the shielding unit 120 is formed of a plate-like member 121 having a predetermined area, and may be made of a material having magnetism to shield a magnetic field generated from the antenna unit.

In this case, when the antenna unit includes a plurality of antennas 110a, 110b, and 110c that perform different roles, the shielding unit may include a sheet having different characteristics .

That is, the shielding units 120 'and 120' 'may include a first sheet 125 and a second sheet 126 having different permeabilities, and the first sheet 125 may have a thickness of 100 to 350 kHz or 6.78 MHz can have a relatively higher permeability than the second sheet 126.

The first sheet 125 and the second sheet 126 may be formed in a frame shape to reduce the overall thickness of the first sheet 125 and the second sheet 126, (See Fig. 10).

Here, the first sheet 125 is for improving the performance of the antenna 110a for wireless power transmission, and the second sheet 126 is for improving the performance of the NFC antenna 110a.

For example, the first sheet 125 may be a ribbon sheet including at least one of an amorphous alloy and a nanocrystalline alloy, and the second sheet 126 may be a ferrite sheet.

Here, the amorphous alloy or the nanocrystalline alloy may be an Fe-based or a Co-based magnetic alloy. In addition, the amorphous alloy and the nanocrystalline alloy may include a three-element alloy or a five-element alloy. For example, the three-element alloy may include Fe, Si, and B, B, Cu and Nb.

The ferrite sheet may be a sintered ferrite sheet, and may include at least one of Mn-Zn ferrite and Ni-Zn ferrite.

Meanwhile, the first sheet 125 may have a multi-layer structure as shown in FIG. For example, the first sheet 125 may be formed by stacking a plurality of ribbon sheets 125a including at least one of an amorphous alloy and a nanocrystalline alloy via an adhesive layer 125b.

In addition, at least one of the first sheet 125 and the second sheet 126 may be separately formed into a plurality of fine pieces, and the plurality of fine pieces may be entirely insulated or partially insulated Respectively. At this time, the plurality of fine pieces may be formed to have a size of 1 to 3 mm, and each piece may be irregularly randomized. This is for the purpose of increasing the overall resistance by suppressing the generation of the eddy current by improving the flexibility of the sheet itself by separating and forming each sheet.

When a plurality of sheets formed by separating the shielding unit 120 into fine pieces are laminated in multiple layers, an adhesive layer containing a nonconductive component is disposed between the respective sheets, The adhesive layer may serve to insulate the plurality of minute pieces constituting each sheet from each other. Here, the adhesive layer may be formed of an adhesive or may be provided on one side or both sides of a substrate in the form of a film with an adhesive applied thereto.

In addition, a separate protective film 127 attached to the upper and lower surfaces of the shielding unit 120 through adhesive layers may be disposed, respectively.

It is noted that the wireless power transmission module 100 according to the present invention can be applied to the Qi mode, the PMA mode wireless charging, and the A4WP mode using self resonance. In addition, it is noted that the wireless power transmission module 100 according to the present invention may be mounted on a back cover or a rear case of a portable electronic device such as a portable terminal.

In addition, when the antenna unit according to the present invention includes another antenna such as an MST antenna and an NFC antenna in addition to the antenna 110a for wireless power transmission, and the other antenna is formed in the form of a flat plate coil, It can be realized with the same structure as the antenna for power transmission. In addition, it is noted that the other antenna may be provided on one surface of the circuit board in the form of a pattern printed with a copper foil or a conductive metal.

Meanwhile, the wireless power transmission module 100 according to the present invention may be used as a wireless power transmission module for transmitting wireless power or as a wireless power reception module for receiving wireless power transmitted from the wireless power transmission module , And can be applied to various types of portable auxiliary batteries.

For example, the wireless power transmission module 100 according to the present invention can be applied to a portable auxiliary battery 200 including at least one battery 210 (see FIGS. 12 and 13).

That is, the portable auxiliary battery 200 may include a battery 210, a receiving unit 220, and a transmitting unit 230. A receiving unit 220 is disposed on one side of the battery 210, 230, and the battery 210, the receiving unit 220, and the transmitting unit 230 may be respectively installed inside the case.

Here, the battery 210 serves as a power source for charging a main battery (not shown) of a portable electronic device to be charged, and the receiving unit 220 charges the power of the battery 210 And the transmitter 230 charges the main battery (not shown) of the portable electronic device.

In this case, the receiving unit 220 may be implemented as a wireless power receiving module, and the transmitting unit 230 may be implemented by the wireless power transmitting module 100 as a wireless power transmitting module .

The receiving unit 220 can receive the wireless power signal from the external charging device and generate electric power to charge the battery 210. The transmitting unit 230 can receive the wireless power signal from the battery 210, The main battery (not shown) of the portable electronic device can be charged.

That is, the portable auxiliary battery 200 can charge the built-in battery 210 by itself or charge the main battery of the portable electronic device using a wireless scheme.

As another example, the wireless power transmission module 100 according to the present invention may be applied to a portable auxiliary battery 300 or 400 in which a wireless scheme and a wired scheme are mixed, as shown in FIGS.

That is, the portable auxiliary battery 300 may include a battery 310, a receiving unit 320, and a charging port unit 340 (see FIGS. 15 and 16).

Here, the battery 310 is connected to the portable electronic device to be charged through the charging port portion 340 in a wired manner, thereby providing power to the main battery (not shown) of the portable electronic device 10 The receiving unit 320 receives wireless power from an external charging device using a wireless scheme, and charges the power of the battery 310 by generating electric power.

That is, the receiving unit 320 may be embedded in the case together with the battery 310, and a charging port 340 electrically connected to the battery 310 may be formed on one side of the case. The receiving unit 320 may be implemented as a wireless power receiving module for receiving the wireless power of the wireless power transmission module 100 described above.

Accordingly, when the power of the battery 310 is to be charged, the power of the battery 310 is generated by receiving the radio power transmitted from the external charging device 20 through the receiving unit 320 to generate electric power. When the main battery of the portable electronic device is to be charged, the portable electronic device 10 is electrically connected to the charging port portion 340 so that the portable electronic device 10 can be powered The main battery of the electronic device 10 can be charged.

16 and 17, the built-in battery 410 may be charged in a wired manner, and the main battery of the portable electronic device to be charged may be charged in a wireless manner, As shown in FIG.

For this purpose, the portable auxiliary battery 400 may include a battery 410, a transmitter 430, and a charge port unit 440.

That is, the transmitter 430 may be embedded in the case together with the battery 410, and a charge port 440 electrically connected to the battery 410 may be formed on one side of the case. At this time, the transmitter 430 may be implemented as a wireless power transmission module for transmitting the wireless power by the wireless power transmission module 100 described above.

Accordingly, when the main battery of the portable electronic device 10 is to be charged, the wireless power is transmitted to the portable electronic device 10 through the transmission unit 430 using the power stored in the battery 410 16, the external charging device 20 is electrically connected to the charging port portion 440 to charge the external charging device 20 (see FIG. 16) The power source of the battery 410 can be charged using a power source provided from the power source (see FIG. 17).

As described above, the portable auxiliary batteries 300 and 400 are configured in such a manner that the charging method of the built-in batteries 310 and 410 and the charging method of the main battery of the portable electronic device 10 are different from each other, The main battery of the portable electronic device 10 can be charged at the same time.

That is, when the main battery of the portable electronic device is required to be charged in a state where the power stored in the batteries 310 and 410 is insufficient or completely discharged, the user can use the battery (not shown) installed in the auxiliary batteries 300 and 400 The main battery of the portable electronic device can be charged using the power supplied from the battery 310 through the charging method of the batteries 310 and 410 while charging the batteries 310 and 410.

Meanwhile, the wireless power transmission module 100 according to the present invention plays a role of a wireless power transmission module that is installed together with a battery in an accessory such as a protective case of a portable terminal and transmits power stored in the battery by wireless power, Of the secondary battery of the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: wireless power transmission module 110a: wireless power transmission antenna
111: body 112: first length portion
113: second length portion 114: first lead portion
115: first terminal portion 116: first portion
117: second portion 118: seat groove
119: second lead portion 119a: second terminal portion
120: shielding unit 123: receiving groove
124: cutout section 125: first sheet
126: second sheet layer 127: protective film
200, 300, 400: Portable auxiliary battery 210, 310, 410: Battery
220, 320, 420: Receiving unit 230, 330,
340, 440: Charging port part

Claims (15)

An antenna unit including at least one antenna for wireless power transmission made of a flat coil; And
And a shielding unit disposed on one surface of the antenna unit for shielding a magnetic field,
Wherein the antenna for wireless power transmission comprises:
A body having a plurality of turns on the same plane, the conductive member having a predetermined length;
A first length portion including a first lead portion extending from the central portion of the body to the outside of the body and a first terminal portion provided at an end of the first lead portion; And
And a second length portion including a second lead portion extending outwardly from a side portion of the body and a second terminal portion provided at an end portion of the second lead portion,
Wherein the first portion includes a first portion having a thickness less than a thickness of the conductive member that is not overlapped with the first portion of the body, Power transmission module The method according to claim 1,
Wherein the first portion includes a second portion extending from a central portion of the body to an outer side of the body so as to be superimposed on one surface of the body in a superimposed manner and the first lid portion has a predetermined length extending outwardly from an end portion of the first portion, Wireless power transmission module. The method according to claim 1,
Wherein the first length portion presses only a length corresponding to the first portion such that the first portion has a thickness thinner than a thickness of the conductive member that is not overlapped with the first portion of the body. The method according to claim 1,
Wherein the first portion is disposed so as to overlap the first portion on one side of the body, and then the first portion and the body are simultaneously pressed so that the first portion is thinner than the thickness of the conductive member in which the first portion is not overlapped / RTI > 5. The method of claim 4,
And a seating groove formed at a predetermined depth in a surface of the body corresponding to the first portion. The method according to claim 1,
Wherein the first portion is formed in an elliptical shape having a major axis and a minor axis. The method of claim 3,
Wherein the first portion is pressed to have a thickness between 60% and 95% of the thickness before being pressed. 5. The method of claim 4,
The first portion is pressed to have a thickness of 60% to 95% of the thickness before pressing,
Wherein the conductive member constituting the body corresponding to the region corresponding to the first portion is pressed to have a thickness of 60% to 95% with respect to the thickness before the pressing. The method according to claim 1,
Wherein the shielding unit has a receiving portion for disposing the first length portion in a region corresponding to the first length portion. 10. The method of claim 9,
Wherein the receiving portion is a receiving groove formed to be recessed at a predetermined depth from one surface of the shielding unit. 10. The method of claim 9,
Wherein the receiving portion is an incision portion having a predetermined length incision from the rim of the shielding unit inward. The method according to claim 1,
Wherein the antenna unit further comprises at least one of an MST antenna and an NFC antenna. A portable auxiliary battery comprising at least one battery,
A wireless power transmission module as claimed in any one of claims 1 to 12, wherein the wireless power transmission module is disposed on one side of the battery so as to receive wireless power from the charging device to charge the battery, And
The wireless power transmission module according to any one of claims 1 to 12 is provided as a wireless power transmission module so that the power stored in the battery can be transmitted to the portable electronic device to charge the main battery of the portable electronic device And a transmitter disposed on the other surface of the battery. A portable auxiliary battery comprising at least one battery,
The wireless power transmission module according to any one of claims 1 to 12 as a wireless power receiving module for receiving wireless power transmitted from a charging device to charge the battery; And
And a charging port unit for supplying power stored in the battery to the portable electronic device through a charging cable. A portable auxiliary battery comprising at least one battery,
The wireless power transmission module according to any one of claims 1 to 12 as a wireless power transmission module for transmitting power stored in the battery to a portable electronic device to charge the main battery of the portable electronic device; And
And a charging port portion for supplying power stored in the charger to the battery through a charging cable.

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