KR20150131925A - Portable electronic device capable of NFC communication - Google Patents

Abstract

The present invention relates to an electronic device capable of near field communication (NFC) which is advantageous for integration and miniaturization, and has excellent sensitivity. The present provides the portable electronic device capable of NFC which comprises: an antenna chip which is arranged inside a battery protective circuit package configuring a battery pack, and has an NFC antenna embedded therein; and an extended antenna loop which electrically is connected to the antenna chip, and is arranged outside of the battery protective circuit package.

Description

[0001] The present invention relates to an electronic device capable of NFC communication,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic apparatus, and more particularly, to an electronic apparatus capable of NFC communication.

Near Field Communication (NFC) is a non-contact short-range wireless communication standard that enables wireless communication between electronic devices at a short distance within 10 cm using a frequency of 13.56 MHz. It was developed jointly by NXP Semiconductor and Sony Japan. NFC's transmission rates per second are 106 Kbps, 212 Kbps, 424 Kbps or 848 Kbps. Its proximity characteristics and encryption technology provide excellent security and it is possible to identify devices without any complicated pairing procedure. There is an advantage that it can be recognized. In particular, NFC is a smart card type non-contact wireless communication technology that utilizes RFID technology. It is bi-directional compared to a smart card, has a relatively large storage memory space, and has a wide range of applicable services. Accordingly, this technology has been introduced to electronic devices such as smart phones and tablet PCs, which have recently been commercialized.

On the other hand, batteries are used in electronic devices such as smart phones, tablet PCs, and notebook computers. Lithium-ion batteries are the most widely used batteries in portable handsets, but they also generate heat during overcharging and overcurrent, and when the temperature rises due to heat generation, they may deteriorate performance as well as the risk of explosion. Therefore, a conventional battery is equipped with a protection circuit device that detects and blocks overcharge, over-discharge, and over-current, or a protection circuit structure that detects overcharge, over-discharge, do.

Recently, products combining NFC antennas with batteries of the above-mentioned electronic devices have been introduced. However, in this case, a process of separately coupling an NFC antenna to a battery is additionally required, which increases manufacturing cost. Further, The size of the battery is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide an electronic device capable of NFC communication. However, these problems are exemplary and do not limit the scope of the present invention.

An electronic device capable of NFC communication according to one aspect of the present invention can be provided. The electronic device capable of NFC communication includes an antenna chip disposed inside a battery protection circuit package constituting a battery pack and having an NFC antenna incorporated therein; And an extension antenna loop electrically connected to the antenna chip and disposed outside the battery protection circuit package.

In the NFC-enabled electronic device, the length of the extended antenna loop may be set so that the ratio of the value of the inductance generated by the extended antenna to the value of the inductance generated by the antenna chip is 13% or more.

In the NFC communication enabled electronic device, the extended antenna loop may be positioned at least a part of the main board edge.

In the electronic device capable of NFC communication, the extended antenna loop may be extended to the outside of the battery protection circuit package while being connected to the substrate of the battery protection circuit package, and may be disposed in close contact with the side surface of the battery protection circuit package.

In the electronic device capable of NFC communication, the battery protection circuit package includes a substrate on which the antenna chip can be mounted, the substrate being disposed on both edge portions of the battery protection circuit package, and electrically connected to the electrode terminal of the battery bare cell A lead for a first internal connection terminal and a lead for a second internal connection terminal; A lead for an external connection terminal, which is disposed between the lead for the first internal connection terminal and the lead for the second internal connection terminal and constitutes a plurality of external connection terminals; And a mounting lead which is disposed between the lead for the first internal connection terminal and the lead for the second internal connection terminal and on which the protection IC, the field effect transistor and at least a part of the antenna chip can be mounted, And further comprising an electrical connecting member for electrically connecting at least any two selected from the group consisting of the antenna chip, the protection IC, the field effect transistor, and the plurality of leads, A battery protection circuit can be constructed without using a substrate. In this case, the extended antenna loop may be a part of the lead frame extending out of the battery protection circuit package, and may be bent downward and closely attached to the side surface of the battery pack.

According to some embodiments of the present invention as described above, it is possible to realize an electronic device which is advantageous in integration and miniaturization, and capable of NFC communication with excellent sensitivity. Of course, the scope of the present invention is not limited by these effects.

1A is a circuit diagram of a battery protection circuit to be implemented by a part of a battery protection circuit package according to a comparative example of the present invention.
1B is a diagram illustrating a configuration of a general short range wireless communication (NFC).
2 is a perspective view of a battery pack having a battery protection circuit package according to a comparative example of the present invention.
3 is a perspective view of a battery protection circuit package according to a comparative example of the present invention.
4 is an exploded perspective view of a battery pack having a battery protection circuit package according to a comparative example of the present invention.
5 is an exploded perspective view of an electronic device capable of NFC communication according to an embodiment of the present invention.
Fig. 6 is an enlarged perspective view of the configuration of area A in Fig. 5; Fig.
7A is a perspective view of a battery pack constituting an electronic device capable of NFC communication according to an embodiment of the present invention.
7B is an exploded perspective view of a battery pack constituting an electronic device capable of NFC communication according to an embodiment of the present invention.
8A and 8B are perspective views of a battery protection circuit package incorporated in a battery pack constituting an electronic device capable of NFC communication according to an embodiment of the present invention.
9 is a perspective view illustrating a part of a battery protection circuit package built in a battery pack constituting an electronic device capable of NFC communication according to an embodiment of the present invention.
10 is a perspective view illustrating a modified configuration of a battery protection circuit package embedded in a battery pack constituting an electronic device capable of NFC communication according to an embodiment of the present invention.
11 is a perspective view illustrating still another modified partial configuration of a battery protection circuit package incorporated in a battery pack constituting an electronic device capable of NFC communication according to an embodiment of the present invention.
12 is an exploded perspective view of an electronic device capable of NFC communication according to another embodiment of the present invention.
13 is a perspective view of a battery pack constituting an electronic device capable of NFC communication according to another embodiment of the present invention.
14 is a perspective view illustrating a configuration of a battery protection circuit package incorporated in a battery pack constituting an electronic device capable of NFC communication according to another embodiment of the present invention.
15 is a perspective view illustrating a modified configuration of a battery protection circuit package incorporated in a battery pack constituting an electronic device capable of NFC communication according to another embodiment of the present invention.

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

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified in various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, pattern, pad, layer or section from another region, pattern, pad, layer or section.

Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Like reference numerals in the drawings denote like elements, and in some cases, redundant explanations in the drawings may be omitted.

In the embodiments of the present invention, the lead frame may be divided into a structure in which the lead terminals are patterned on the metal frame, and a structure and thickness of the lead frame are different from those of the printed circuit board on which the metal wiring layer is formed.

An electronic device capable of NFC communication according to embodiments of the present invention may include, for example, a smart phone, a tablet PC, and a notebook, and will be described below as an example of a configuration for a smart phone.

FIG. 1A is a circuit diagram of a battery protection circuit to be implemented by a part of a battery protection circuit package according to a comparative example of the present invention, and FIG. 1B is a diagram illustrating a configuration of a general short range wireless communication (NFC). 2 is a perspective view of a battery pack having a battery protection circuit package according to a comparative example of the present invention, FIG. 3 is a perspective view of a battery protection circuit package according to a comparative example of the present invention, and FIG. Fig. 2 is an exploded perspective view of a battery pack having a battery protection circuit package according to the present invention.

The battery protection circuit to be implemented by the battery protection circuit package constituting the electronic device according to the embodiment of the present invention may include the protection circuit shown in Fig. 1A except for the dotted line portion 141. [

Referring to FIG. 1A, the battery protection circuit 10 includes first and second internal connection terminals B + and B- connected to a battery cell, and is connected to a charger during charging. (P +, CF, P-) for connection with an electronic device (e.g., a portable terminal or the like). Here, the first external connection terminal P + and the third external connection terminal P- of the first to third external connection terminals P +, CF, and P- are for power supply and the other is an external connection terminal The second external connection terminal CF divides the battery, for example, and charges the battery according to the battery. The second external connection terminal CF may be a thermistor, which is a component for sensing the battery temperature during charging, and may be used as a terminal to which other functions are applied.

The battery protection circuit 10 is connected to the connection structure of the dual FET chip 110, the protection integrated circuit 120, the resistors R1, R2 and R3, the varistor V1 and the capacitors C1 and C2 . The dual FET chip 110 includes a first field effect transistor (FET1) and a second field effect transistor (FET2) having a drain common structure. The protection IC 120 is connected to the first internal connection terminal B + which is the positive terminal of the battery through the resistor R1 and is connected to the first node n1 through the first node n1, A terminal (VDD terminal) for sensing a voltage application and a battery voltage, a reference terminal (VSS terminal) serving as a reference for an operation voltage inside the protection IC 110, a sensing terminal (V- A discharge cutoff signal output terminal (DO terminal) for turning off the first field effect transistor FET1 in the overdischarge state, a charge cutoff signal output terminal C0 for turning off the second field effect transistor FET2 in the overcharge state, Terminal).

At this time, the inside of the protection IC 120 includes a reference voltage setting unit, a comparison unit for comparing the reference voltage with the charge / discharge voltage, an overcurrent detection unit, and a charge / discharge detection unit. Here, the criterion of charging and discharging states can be changed to a specification (SPEC) required by the user, and the charging / discharging state is determined by recognizing the voltage difference of each terminal of the protection IC 120 according to the determined standard.

When the protection IC 120 reaches an over-discharge state at the time of discharging, the DO terminal becomes LOW to turn off the first field effect transistor FET1, and when the overcharge state is reached, the CO terminal becomes low, The field effect transistor FET2 is turned off and the second field effect transistor FET2 is turned off at the time of charging when the overcurrent flows and the first field effect transistor FET1 at the time of discharging.

The resistor R1 and the capacitor C1 serve to stabilize the variation of the power supply of the protection IC 120. [ The resistor R1 is connected between the first node n1 which is the supply node of the battery power supply V1 and the VDD terminal of the protection IC 120 and the capacitor C1 is connected between the VDD terminal and the VSS terminal of the protection IC do.

And the resistors R1 and R2 become current limiting resistors when the high voltage charger or charger exceeding the absolute maximum rating of the protection IC 120 is connected upside down. The resistor R2 is connected between the V- terminal of the protection IC 120 and the second node n2 to which the source terminal S2 of the second field effect transistor FET2 is connected.

The capacitor C2 is connected to the source terminal S1 of the first node n2 (or the third external connection terminal P-) and the first field effect transistor FET1 (or the VSS terminal, the second internal connection terminal B -)). The capacitor C2 does not significantly affect the characteristics of the battery protection circuit product, but is added for user's request or stability. The capacitor C2 is for stabilizing the system by improving the resistance to voltage fluctuation and external noise.

The resistor R3 and the varistor V1 are elements for ESD (Electrostatic Discharge) and surge protection and are connected in parallel to each other. The second external connection terminal CF and the second node n2 Or the third external connection terminal P-). The resistance of the varistor (V1) is lowered when an overvoltage occurs. When the overvoltage is generated, the resistance of the varistor (V1) is lowered, thereby minimizing circuit damage due to overvoltage.

Meanwhile, in addition to the configuration of the battery protection circuit described above, an NFC circuit 141 may be added to support Near Field Communication (NFC). The added NFC circuit 141 may include, for example, an NFC external connection terminal NFC1, NFC connection terminals PD1 and PD2, and NFC matching elements C3, C4, C5, and C6. The NFC connection terminals PD1 and PD2 disclosed in the circuit diagram of FIG. 1A are implemented as terminals 60-1 and 60-2 in the package 300a shown in FIG. 3, (472, 474 in Fig. 2) of the NFC antenna (470 in Fig. 2) being placed. The NFC antenna 470 may be, for example, a loop-shaped antenna. When the ends 472 and 474 of the NFC antenna 470 are brought into contact with the NFC connection terminals PD1 and PD2, the NFC matching elements C3, C4, C5, and C6 and the NFC antenna 470 are electrically connected, a closed loop can be formed. The NFC matching elements C3, C4, C5, and C6 may be, for example, capacitors for frequency matching. For example, both ends 472 and 474 of the NFC antenna 470 are connected to capacitors, which are the NFC matching elements, to form a closed loop, and the NFC antenna 470 and the capacitors C3, C4, By using the generated resonance, a frequency region for NFC communication of 13.56 MHz can be generated and communicated with the NFC device.

Referring to FIG. 1B, an exemplary configuration of a typical short range wireless communication (NFC) includes an NFC control integrated circuit portion 142, a heartbeat chip 144, and a reader 148. A first inductor 146 and a second inductor 147 are provided between the waveguide chip 144 and the reader 148 and a first capacitor portion 145 is provided between the waveguide chip 144 and the first inductor 146, May be provided. A second capacitor portion 143 may be provided between the NFC control integrated circuit portion 142 and the idler chip 144.

The NFC antenna 470 corresponds to the first inductor 146 shown in FIG. 1B and the capacitors C3, C4, C5, and C6 correspond to the first capacitor 145 shown in FIG. 1B. do. The first inductor 146 and the first capacitor portion 145 are connected to the NFC control integrated circuit portion 142, the second capacitor portion 143 and the breaker chip 144 through the NFC external connection terminal NFC1 .

2 to 4, in the battery protection circuit package and the battery pack according to the comparative example of the present invention, the NFC antenna 470 is disposed over the side surface of the battery bare cell 400 constituting the battery pack 600a do. The ends 472 and 474 of the NFC antenna 470 may be bonded to the terminal pads 60-1 and 60-2 of the battery protection circuit package 300a by, for example, a soldering process. However, since the battery protection circuit package 300a for the antenna soldering process requires the configuration of the terminal pads 60-1 and 60-2, it is disadvantageous in downsizing the package and involves a limitation in securing the space inside the package. Meanwhile, the manufacturing process of the battery pack may be complicated by the antenna soldering process. In addition, the joint portion between the NFC antenna 470 and the battery protection circuit package 300a is weak in structure, so that the shear strength may be low in view of the overall structure.

The battery protection circuit package according to embodiments of the present invention overcomes the above-mentioned problems by providing the antenna chip including the NFC antenna. Further, the range of recognition of the antenna performance is supplemented by adding the extended antenna, do.

FIG. 5 is an exploded perspective view of an electronic device capable of NFC communication according to an embodiment of the present invention, and FIG. 6 is an enlarged perspective view illustrating the configuration of region A of FIG.

7A and 7B are an exploded perspective view and an exploded perspective view of a battery pack constituting an electronic device capable of NFC communication according to an embodiment of the present invention. FIGS. 8A and 8B illustrate an NFC communication according to an embodiment of the present invention. Fig. 2 is a perspective view of a battery protection circuit package incorporated in a battery pack constituting a possible electronic device.

9 to 11 are perspective views illustrating various configurations of various parts of a battery protection circuit package incorporated in a battery pack constituting an electronic device capable of NFC communication according to an embodiment of the present invention.

5-11, an electronic device 2000 capable of NFC communication according to an embodiment of the present invention is disposed inside a battery protection circuit package 300 constituting a battery pack 600a, and includes an NFC antenna An antenna chip 140; And an extended antenna loop 246 electrically connected to the antenna chip 140 and disposed outside the battery protection circuit package 300. For example, the extended antenna loop 246 comprises a conductive line pattern for the antenna formed on the main board 1100 of the electronic device 2000. For example, the extended antenna loop 246 may be placed on at least a portion of the edge of the mainboard 1100.

5 and 6, in an electronic device 2000 capable of performing NFC communication according to an embodiment of the present invention, a main board 1100 can perform a core operation of the electronic device 2000 And may be referred to as a main set, a main board, or the like. The core electronic components 242 mounted on the main board 1100 may include, for example, an application processor (AP), a camera module, a sensor module, a frequency filtering component, or a memory module.

As described above, the main board 1100 is provided with various electronic components 242 for implementing the essential operation of the electronic device 2000 and, although not shown, for electrical connection between the various electronic components 242 A wiring pattern is formed. The conductive line pattern constituting the extension antenna 246 may be provided on the main board 1100 separately from the wiring pattern for electrical connection between the electronic elements 242 described above.

On the other hand, a socket 244 on which the centrifugal chip (144 in Fig. 1B) can be mounted can be configured on the main board 1100. [ Further, an NFC matching element (143, 145 in FIG. 1B) may be configured on the main board 1100. The extension antenna 246 has a structure to connect the battery pack 600a and the socket 244 and has at least part of the edge of the main board 1100 in order to maximize the area of the internal area defined by the extension antenna 246. [ As shown in FIG.

6, the extended antenna loop 246 formed on the main board 1100 is connected to the external connection terminals 50-2, 50-3, 50-4, and 50-4 of the battery pack 600a through the connection terminals 249. [ (For example, the NFC terminal and the CF terminal). The external connection terminals 50-2, 50-3, 50-4 and 50-5 correspond to external connection terminals of the battery protection circuit package 300 constituting the battery pack 600a.

Next, the battery pack 600a and the battery protection circuit package 300 will be described first in order to describe the configuration of the antenna chip 140. FIG.

Referring to FIGS. 7A and 7B, the battery bare cell 400 constituting the battery pack 600a includes an electrode assembly and a cap assembly. The electrode assembly includes a positive electrode plate formed by applying a positive electrode active material to a positive electrode collector, a negative electrode plate formed by applying a negative electrode active material to a negative electrode collector, and a negative electrode plate interposed between the positive electrode plate and the negative electrode plate. The separator may be made of a separator. The positive electrode tab attached to the positive electrode plate and the negative electrode tab attached to the negative electrode plate may be drawn out from the electrode assembly. The cap assembly includes an anode terminal 410, a cap plate 430, and the like. The cap plate 430 may serve as a positive electrode terminal. The cathode terminal 410 may be referred to as a cathode cell or an electrode cell. Therefore, the electrode terminal of the battery bare cell may include the negative terminal 410 and the cap plate 430. The holder 480 serves as a guide for mounting the battery protection circuit package 300 on the upper surface 430 of the battery bare cell 400. Further, And may be fixed on the upper surface 430 of the base 400.

The structure 350a shown in FIG. 9 is a part of the battery protection circuit package 300 embedded in the battery pack 600a and is formed by forming an encapsulant 250a on the structure 350a, ) Can be implemented. The substrate 60 constituting the battery protection circuit package 300 may be, for example, a printed circuit board. Leads 50-1 and 50-7 may be disposed on both ends of the substrate 60. [ External connection terminals 50-2, 50-3, 50-4, and 50-5 of the battery protection circuit package 300 may be formed in the form of a pad formed on the back surface of the substrate 60. [ The FET chip 110 and the protection integrated circuit 120 are mounted on the substrate 60 and further the resistors R1, R2 and R3, the varistor V1 and the capacitors C1 and C2 The passive element 130 can be mounted. Optionally, the PTC device 470 may be mounted on the substrate 60.

An antenna chip (140) is mounted on a substrate (60). The antenna chip 140 includes a chip-type structure including an inductor as an antenna capable of resonating in the NFC frequency band. The coil constituting the inductor incorporated in the antenna chip 140 may have the following winding structure and / or various combinations thereof.

As a first example, the winding structure shown in Fig. 9 (a) includes a coil having a first winding direction. For example, the winding structure may include a core 146a of nickel ferrite; And a coil 146c having a first winding direction wound in a direction parallel to the x-axis direction and the z-axis direction so as to surround the bobbin 146b. In this case, the direction of the induced magnetic field generated in conjunction with the NFC reader 148 is parallel to the y-axis direction. When such a winding structure is employed, near field communication can be realized when the wide side of the side of the battery pack 600a is positioned in parallel with the NFC reader 148. [

As a second example, the winding structure shown in Figure 9 (b) includes a coil having a second winding direction. For example, the winding structure may include a core 146a of nickel ferrite; And a coil 146c having a second winding direction wound in a direction parallel to the y-axis direction and the z-axis direction so as to surround the bobbin 146b. In this case, the direction of the induced magnetic field generated in conjunction with the NFC reader 148 is parallel to the x-axis direction. Near field communication can be realized when the narrow plane of the side of the battery pack 600a is positioned in parallel with the NFC reader 148 when this winding structure is used.

The winding wire structure constituting the antenna chip 140 has been exemplarily described as a winding structure in which a coil is wound around a core. However, the inductor structure in the antenna chip 140 according to the technical idea of the present invention is not limited to this winding structure, and may be implemented by patterning a conductive material, for example.

The structure 350b shown in FIG. 10 is a modified partial structure of the battery protection circuit package 300 built in the battery pack 600a. By forming the sealing material 250a on the structure 350b, (300).

The substrate constituting the battery protection circuit package 300 includes a lead frame including a plurality of leads 50-2, 50-3, 50-4, and 50-5 and a printed circuit board (not shown) disposed on the lead frame 60). External connection terminals 50-2, 50-3, 50-4, and 50-5 of the battery protection circuit package 300 may correspond to a part of a plurality of leads constituting the lead frame. The antenna chip 140 may be mounted on the printed circuit board 60 constituting the substrate, and the description of the winding structure and the like will be omitted since it is the same as that described with reference to FIG.

The structure 350c shown in Fig. 11 is a modified partial structure of the battery protection circuit package 300 built in the battery pack 600a. By forming the sealing material 250a on the structure 350c, (300).

The substrate 50 constituting the battery protection circuit package 300 may be composed of only the lead frame. That is, the substrate 50 is provided at both edge portions thereof, and has a first internal connection terminal lead 50-1 and a second internal connection terminal lead 50-7, which are electrically connected to the electrode terminal of the battery bare cell. ); The external connection terminal leads 50-2 and 50-7 which are disposed between the first internal connection terminal lead 50-1 and the second internal connection terminal lead 50-7 and constitute a plurality of external connection terminals, 3, 50-4, 50-5); The field effect transistor 110 and the antenna chip 140 are disposed between the lead 50-1 for the first internal connection terminal and the lead 50-7 for the second internal connection terminal, And a mounting lead that can be mounted on a part of the lead frame. The antenna chip 140 may further include an electrical connection member 135 for electrically connecting at least any two selected from the group consisting of the protection IC 120, the field effect transistor 110 and the plurality of leads , A battery protection circuit can be constructed without using a separate printed circuit board.

The antenna chip 140 may be mounted on the lead frame 50 constituting the substrate, and the description of the winding structure and the like will be omitted because it is the same as that described with reference to FIG.

Since the antenna chip 140 shown in FIGS. 9 to 11 is relatively small in size, the antenna sensitivity may be relatively low. In order to compensate for the sensitivity of the antenna chip 140, May be understood as an additional antenna provided separately from the chip 140.

The elongated antenna 246 has a shape that can generate an inductance and may have at least some shape of a loop that can generate, for example, an inductance. The inductance is a quantity representing the ratio of the counter electromotive force generated by the electromagnetic induction by the change of the current flowing through the circuit, and the unit is H (Henry). In this specification, the loop has any shape capable of generating an inductance. Also, the loop is not necessarily limited to a closed loop.

The present inventor has found that the inductance value generated by the extended antenna 246 is a predetermined value of the inductance value generated in the antenna chip 140 so that the extended antenna 246 does not stay in a simple conductive pattern but substantially acts as an additional auxiliary antenna. Ratio should be more than.

Table 1 shows the results of testing whether the NFC auxiliary antenna functions according to the magnitude of the inductance value generated by the extended antenna 246 when the inductance value generated from the antenna chip 140 is 0.56 μH.

Experimental Example Extended antenna inductance value (μH) Extension antenna length (mm) Inductance ratio NFC auxiliary antenna
Functionality Experimental Example 1 0.04 34 6% x Experimental Example 2 0.05 37 8% x Experimental Example 3 0.07 43 11% x Experimental Example 4 0.08 47 13% o Experimental Example 5 0.09 50 14% o

Referring to Experimental Example 1, when the length of the extended antenna 246 forming the loop is 34 mm, the inductance value generated by the extended antenna 246 is 0.04 μH, but the extended antenna 246 does not perform the NFC auxiliary antenna function Respectively. That is, when the inductance value generated by the extension antenna 246 is only 6% of the inductance value generated by the antenna chip 140, the extension antenna configured with the conductive line pattern for the antenna is introduced, but the NFC recognition distance is not improved .

On the other hand, in Experimental Example 4, when the length of the extended antenna 246 forming the loop is 47 mm, the inductance value generated by the extended antenna 246 is 0.08 μH, and the extended antenna 246 functions as the NFC auxiliary antenna Respectively. That is, when the inductance value generated by the extension antenna 246 reaches 13% of the inductance value generated by the antenna chip 140, the NFC recognition distance is improved by the extension antenna formed of the conductive line pattern for the antenna.

The results of Experimental Examples 1 to 5 show that the length of the conductive line pattern for the antenna constituting the elongated antenna 246 is kept to be equal to or greater than the predetermined length so that the value of the inductance generated by the elongated antenna 246 is different from the value of the inductance 140) is greater than or equal to a predetermined ratio (for example, 13%), it is confirmed that the NFC recognition distance is improved by the extension antenna formed of the conductive line pattern for the antenna.

FIG. 12 is an exploded perspective view of an electronic device capable of NFC communication according to another embodiment of the present invention, FIG. 13 is a perspective view of a battery pack constituting an electronic device capable of NFC communication according to another embodiment of the present invention, Is a perspective view illustrating a configuration of a battery protection circuit package built in a battery pack constituting an electronic device capable of NFC communication according to another embodiment of the present invention.

First, the battery protection circuit package 300 shown in FIG. 14 includes the encapsulant 250a in the structure 350b shown in FIG. 10 or the structure 350c shown in FIG. 11 except for the extended antenna loop 246. [ As shown in FIG. However, the extended antenna loop 246 corresponds to a part of the lead frame 50 and is configured to extend outside the battery protection circuit package 300. For example, one end of the extension antenna loop 246 may extend outwardly in unison with the lead 50-3 for the external connection terminal of the lead frame 50, and the other end of the extension antenna loop 246 may be connected to the lead And may extend outwardly integrally with the lead 50-5 for the external connection terminal of the frame 50. [ The extended antenna loop 246 may have a first portion 246a having a bend that can be folded down (negative z-axis direction) and a second portion 246b forming a substantially rectangular loop. By being bent downward in the first portion 246a, the extended antenna loop 246 can be disposed in close contact with the side surface of the battery pack 600a. Alternatively, an adhesive material may be interposed on the side surfaces of the extension antenna loop 246 and the battery pack 600a. According to such a configuration, the extension antenna loop 246 can be implemented without a separate soldering joint as shown in FIG. 4, and the structural strength of the joint portion can be relatively improved since it is integrated with the lead frame.

15 is a perspective view illustrating a modified configuration of a battery protection circuit package incorporated in a battery pack constituting an electronic device capable of NFC communication according to another embodiment of the present invention. The second portion 246b of the extended antenna loop 246 shown in Figure 15 has a number of turns so that an improvement in the inductance value generated in the extended antenna loop 246 can be expected. Other descriptions of the extended antenna loop 246 are omitted because they overlap with those described in Fig.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

50: Lead frame
60: printed circuit board
140: Antenna chip
246: Extension antenna
300: Battery protection circuit package
600a: Battery pack
1100: Motherboard
2000: Electronic devices capable of NFC communication

Claims (7)

An antenna chip disposed inside a battery protection circuit package constituting the battery pack and having an NFC antenna; And
An elongated antenna loop electrically connected to the antenna chip and disposed outside the battery protection circuit package;
Wherein the NFC communication is enabled. The method according to claim 1,
Wherein the length of the extended antenna loop is set so that the ratio of the value of the inductance generated by the extended antenna to the value of the inductance generated by the antenna chip is 13% or more. The method according to claim 1,
Wherein the extended antenna loop comprises a conductive line pattern for an antenna formed on a main board of the electronic device. The method of claim 3,
Wherein the extended antenna loop comprises at least a portion of the main board edge, The method according to claim 1,
Wherein the extended antenna loop is extended to the outside of the battery protection circuit package and is disposed in close contact with a side surface of the battery pack while being connected to a substrate of the battery protection circuit package. The method according to claim 1,
Wherein the battery protection circuit package includes a substrate on which the antenna chip can be mounted,
The substrate includes a lead for a first internal connection terminal and a lead for a second internal connection terminal which are respectively disposed at both edge portions and are electrically connected to the electrode terminals of the battery bare cell; A lead for an external connection terminal, which is disposed between the lead for the first internal connection terminal and the lead for the second internal connection terminal and constitutes a plurality of external connection terminals; And a mounting lead which is disposed between the lead for the first internal connection terminal and the lead for the second internal connection terminal and on which a protection IC, a field effect transistor and at least a part of the antenna chip can be mounted, A lead frame,
And an electrical connecting member for electrically connecting at least any two selected from the group consisting of the antenna chip, the protection IC, the field effect transistor, and the plurality of leads, A protection circuit,
An electronic device capable of NFC communication. The method according to claim 6,
Wherein the extended antenna loop is a part of the lead frame extended to the outside of the battery protection circuit package and is bent downward and disposed in close contact with a side surface of the battery pack.

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