KR20080074640A - Battery charging device for mobile communication terminal using radio frequency of RF reader - Google Patents

Abstract

The present invention is to charge the battery of the mobile communication terminal using the RF resonance characteristics rather than the conventional charging method through a wire, and more specifically, by using the power induced through the antenna in a mobile communication terminal with a built-in RFID antenna When charging the battery and charging, it does not affect the communication function of the RFID at all, and is configured to enable charging using the 13.56Mhz RFID antenna currently applied to the mobile communication terminal.

The 13.56 MHz RFID antenna and the RF power receiving antenna are wired along the edge of the flexible printed circuit board FPCB, or the RFID antenna is wired around the edge of the flexible printed circuit board FPCB. (Wiring), the RF power receiving antenna is additionally wired (held) spirally along the center of the RFID antenna to apply a line-separated hybrid antenna to transmit and receive information with the external RFID reader and wireless charging at the same time Wherever the current RFID Reader terminal is installed around the world, it can be charged freely without a separate charging device, and it uses the radio frequency of the RFID reader that can automatically charge the battery while using RFID communication. An object of the present invention is to provide a battery charging device for a mobile communication terminal.

Description

Battery charging device for mobile communication terminal using radio frequency of RDF reader {THE APPARATUS OF BATTERY CHARGING FOR THE MOBILE COMMUNICATION TERMINAL UNIT BY USING WIRELESS FREQUENCY}

Figure 1 is an embodiment showing a conventional charging method using a conventional dedicated charger,

FIG. 2 is a perspective view illustrating a battery pack structure in which a 13.56 MHz RFID antenna and an RF power receiving antenna are wired on the same line along an edge circumference of a flexible printed circuit board (FPCB) according to the present invention;

3 shows an RFID antenna is wired around the edge of a flexible printed circuit board (FPCB) according to the present invention, and the RF power receiving antenna is further wired in a spiral shape along the center of the RFID antenna. Perspective view showing a hybrid antenna structure separated by lines,

4 is an exploded perspective view illustrating a battery pack component according to the present invention;

FIG. 5 is a diagram illustrating an embodiment of a method of charging a mobile communication terminal battery using an emitted wave of an RFID reader according to the present invention.

6 is a matching (nominal) circuit diagram of the components of the charging circuit module according to the present invention;

7 is a signal separation circuit and a power conversion circuit diagram of components of a charging circuit module according to the present invention;

FIG. 8 is a block diagram illustrating components of a charging circuit module connected to a structure in which a 13.56 MHz RFID antenna and an RF power receiving antenna are wired along the edge of a flexible printed circuit board (FPCB) according to the present invention. Degree,

FIG. 9 illustrates a component of another charging circuit module connected to a structure in which a 13.56 MHz RFID antenna and an RF power receiving antenna are wired on the same line along an edge of a flexible printed circuit board (FPCB) according to the present invention. One block diagram,

FIG. 10 illustrates components of another charging circuit module connected to a structure in which a 13.56 MHz RFID antenna and an RF power receiving antenna are wired on the same line along an edge of a flexible printed circuit board (FPCB) according to the present invention. One block diagram,

FIG. 11 is a view illustrating components of another charging circuit module connected to a structure in which a 13.56 MHz RFID antenna and an RF power receiving antenna are wired on the same line along an edge of a flexible printed circuit board (FPCB) according to the present invention. One block diagram,

12 shows an RFID antenna is wired around the edge of a flexible printed circuit board (FPCB) according to the present invention, and the RF power receiving antenna is further wired in a spiral shape along the center of the RFID antenna. Block diagram showing the components of a charging circuit module connected to a line separated hybrid antenna.

FIG. 13 is a diagram illustrating a structure in which a 13.56 MHz RFID antenna and an RF power receiving antenna are wired on the same line along an edge circumference of a flexible printed circuit board (FPCB) according to the present invention.

FIG. 14 shows an RFID antenna being wired along an edge circumference of a flexible printed circuit board (FPCB) according to the present invention, and an RF power receiving antenna is further wired spirally along a central portion of the RFID antenna. An embodiment showing a line-separated hybrid antenna structure,

15 is a diagram illustrating a compatible antenna structure in which a charging circuit module according to the present invention is installed in a main body of a mobile communication terminal so that a conventional 13.56 MHz RFID antenna 241 has an RF power receiving antenna 242 function. .

※ Brief description of reference numerals ※

100: mobile communication terminal body 110: smart card and smart IC chip

200: battery pack 210: battery cell

220: charging circuit module 230: ferrite sheet

240: flexible printed circuit board

The present invention relates to a circuit configuration according to a wireless charging device and antenna design technology in a mobile communication terminal.

Recently, as communication and information processing technologies are developed, the use of portable devices such as mobile phones, which are convenient to carry, is gradually increasing, and according to the development of technology, new models of terminals having improved performances are continuously spreading.

As shown in FIG. 1, the most commonly used mobile communication terminal has been charged by connecting a dedicated charger to the mobile communication terminal or by using a USB charger terminal.

However, in order to solve the problem of the contact type charging method or the contact type charging method as the contact terminal is exposed to the outside, a contactless charging method for charging a battery using magnetic coupling without electrical contact has been used.

As a technology corresponding to a contactless charger, wirelessly connects a battery pack and a charging device by using a magnetic core, such as a non-contact charging device of a storage battery for a portable mobile device by induction coupling. The method of charging by communication, the prior application published in Korean Patent Application Publication No. 2002-0057469, a printed circuit board (PCB: printed ultra-thin printed circuit board transformer and a contactless battery charger using the printed circuit board transformer) A method of solving a problem of a magnetic core using a transformer formed on a circuit board has been proposed.

In addition, a method of wireless charging with an RFID reader has been proposed by installing an existing 13.56Mhz RFID antenna in a battery pack of a mobile communication terminal.

However, these conventional technologies are only contactless charging through the wireless communication in the static state, the wireless charging when contacting the RFID reader in the dynamic state, that is moving state and at the same time communicate with the external RFID reader information The exchange (mobile banking, subway / bus fare payment, etc.) could not be implemented at all.

In addition, since the battery charging signal and the RFID communication signal are not separated, a signal is canceled due to interference with each other, causing a problem that RFID communication is unsuccessful.

In order to solve the above problems, in the present invention, by converting the power battery chargeable power induced by the maximum power transfer efficiency using the RF resonance characteristic to charge the battery, RFID communication can operate normally,

By using the 13.56Mhz RFID antenna currently used in the mobile communication terminal, it is possible to immediately apply this technology by maintaining the compatibility with the existing environment and not requiring a separate antenna development.

In addition, as a hybrid antenna capable of producing RFID communication and induced power by integrating an antenna configuration, the mobile terminal battery charging device using the radio frequency of the RFID reader can provide the same battery charging efficiency even when the mobile terminal and the RFID characteristics change. The purpose is to provide.

In order to achieve the above object, a mobile communication terminal battery charging device using a radio frequency of an RFID reader according to the present invention,

Battery pack for charging the battery cell 210 using the power induced by the antenna of the mobile communication terminal main body 100 and the flexible printed circuit board (FPCB) while being detached from one side of the mobile communication terminal main body 100 It consists of a mobile communication terminal consisting of 200,

The battery pack 200 is provided with a battery cell 210 having both terminals and a negative terminal and charging and discharging power induced through an antenna of a flexible printed circuit board (FPCB), and one side of the battery cell 210. The charging circuit module 220 is connected to the separation of the RFID communication signal and the battery charging signal, generates an induced current, and generates and charges a voltage, current suitable for the battery is formed of a PCB substrate, the battery cell 210 The ferrite sheet 230 is formed on the upper end to remove radio waves and noise of several tens of MHz to several GHz, and to increase the efficiency of the induction current flowing through the charging circuit module to the battery cell, and the upper portion of the ferrite sheet 230. 13.56MH installed on the same line along the periphery of the flexible printed circuit board (FPCB) 240 so as to allow wireless charging while simultaneously transmitting and receiving information with the external RFID reader 300. z the RFID antenna 241 and the RF power receiving antenna 242 are formed by wiring;

The smart card for analyzing the RFID communication signal transmitted from the charging circuit module 220 of the battery pack 200 to the mobile communication terminal main body 100, processing and generating a response signal and transmitting the response signal to the charging circuit module 220. And by forming the smart IC chip 110 embedded therein.

In addition, the mobile communication terminal battery charging device using a radio frequency of the RFID reader according to the present invention,

Battery pack for charging the battery cell 210 using the power induced by the antenna of the mobile communication terminal main body 100 and the flexible printed circuit board (FPCB) while being detached from one side of the mobile communication terminal main body 100 It consists of a mobile communication terminal consisting of 200,

The battery pack 200 is provided with a battery cell 210 having both terminals and a negative terminal and charging and discharging power induced through an antenna of a flexible printed circuit board (FPCB), and one side of the battery cell 210. A charging circuit module (220a) connected to the separation of the RFID communication signal and the battery charging signal, generates an induced current, and generates and charges a voltage, current suitable for the battery is formed of a PCB substrate, the battery cell 220 The ferrite sheet 230 is formed on the upper end to remove radio waves and noise of several tens of MHz to several GHz, and to increase the efficiency of the induction current flowing through the charging circuit module to the battery cell, and the upper portion of the ferrite sheet 230. The RFID antenna 241 is installed along the periphery of the flexible printed circuit board (FPCB) 240 so that the wireless charging is possible while transmitting and receiving information with the external RFID reader 300. A hybrid antenna 240a, which is wired and is further wired in a spiral shape along the center portion of the RFID antenna 241, is spirally wired;

The mobile communication terminal main body 100 analyzes the RFID communication signal transmitted from the charging circuit module 220a of the battery pack, generates a response signal after processing, and transmits the smart card and smart to the charging circuit module 220a. This is achieved by forming the IC chip 110 embedded therein.

In the present invention, a flexible printed circuit board (FPCB) installed in the upper end of the battery cell, as shown in Figures 2 and 13, along the periphery of the edge of the flexible printed circuit board (FPCB) 13.56 MHz RFID antenna and Configure the RF powered antenna to be wired, or

Alternatively, as shown in FIGS. 3 and 14, a 13.56 MHz RFID antenna is wired around the edge of the flexible printed circuit board FPCB, and the RF power receiving antenna is spirally formed along the center of the RFID antenna. In addition, by configuring a hybrid antenna separated by a line (Wiring) to separate the line, it is possible to transmit and receive information with an external RFID reader and at the same time wireless charging.

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

First, a structure in which a 13.56 MHz RFID antenna and an RF power receiving antenna are wired along the edge of the flexible printed circuit board FPCB according to the present invention will be described.

FIG. 2 is a perspective view illustrating a battery pack structure in which a 13.56 MHz RFID antenna and an RF power receiving antenna are wired along a periphery of an edge of a flexible printed circuit board (FPCB) according to the present invention. 4 is an exploded perspective view showing a battery pack component according to the present invention, which is composed of a battery cell 210, a charging circuit module 220, a ferrite sheet 230, a flexible printed circuit board (FPCB) 240 do.

The battery cell 210 includes both terminals and a negative terminal, and charges and discharges power induced through an antenna of a flexible printed circuit board (FPCB).

The charging circuit module 220 is composed of a PCB substrate, is connected to one side of the battery cell to separate the RFID communication signal and the battery charging signal, to generate an induced current, and to generate a voltage, current suitable for the battery, which is to charge Matching (resonance) and signal separation circuit sections 221 and 222, a power conversion circuit section 223, a battery charging circuit section 224, and a battery protection circuit section (PCM) 225.

Matching (resonance) and signal separation circuit sections 221 and 222 generate an induced current by RF resonance of the radio wave induced from the RFID reader 300, and simultaneously separate signals necessary for RFID communication and signals required for battery charging to convert power. It transfers to the circuit part.

Here, the matching (resonance) circuit unit 221 forms a resonance with the capacitors C5 and C6 inductor L derived from the 13.56 MHz RFID antennas (ANT1, ANT2), as shown in FIG.

The generated resonant frequency can be expressed as shown in Equation 1.

Here, C1 = C5 + C6.

The RFID signals having the maximum efficiency in the RFID antennas (ANT1, ANT2) and capacitors C5 and C6 are transmitted to the signal separation circuit unit 222 through signals SIG1 and SIG2.

The capacitors C3 and C4 are blocking capacitors, which transmit an RFID signal to a SIM card or a smart IC chip of a mobile communication terminal, and prevent a DC voltage from being applied to another circuit.

Capacitors C1 and C2 are surge protection capacitors that prevent sudden shock signals from SIM cards or smart IC chips.

As shown in FIG. 7, signals 1 (SIG1) and 2 (SIG2), which are RFID signals selected by the matching (resonance) circuit unit, are input to the signal separation circuit unit 222.

Capacitors C7 and C8 serve to transfer the RFID signal to the power conversion circuit unit, and capacitor C11 serves to increase the frequency selectivity of the antenna when connecting a hybrid antenna or a charge-only antenna.

The signals supplied by capacitors C7 and C8 are converted to DC by diodes D1, D2, D3, D4, and capacitor C9.

The resistor R1 serves to prevent overcurrent from flowing on the circuit when the current is supplied to the charging circuit, and the capacitors C10 and diode D5 prevent damage to the charging circuit due to surge or overvoltage.

The power conversion circuit unit 223 receives the battery charging signal from the signal separation circuit unit 222 and generates a DC voltage that can be charged.

The battery charging circuit unit 224 generates a voltage and a current suitable for the battery power source (4.2V) and transfers the induced current generated through the power conversion circuit unit to the battery protection circuit unit PCM.

The battery protection circuit unit (PCM) 225 serves to prevent the voltage and current generated from the battery charging circuit unit from being overvoltage charged and overdischarged when the battery is charged.

The charging circuit module 220 including the matching (resonance) and signal separation circuit sections 221 and 222, the power conversion circuit section 223, the battery charging circuit section 224, and the battery protection circuit section (PCM) 225 according to the present invention is shown in FIG. As shown in FIG. 8, the PCB is formed of a PCB and configured in a battery pack, and the smart card and smart IC chip 110 can be configured in the main body of the mobile communication terminal.

Here, the matching (resonance) and signal separation circuit unit (221, 222) receives the RFID communication signal from the battery pack and transfers it to the smart card and smart IC chip 110 built in the mobile communication terminal. In addition, the smart card and smart IC chip 110 installed in the mobile communication terminal main body 100 analyzes and processes the RFID communication signal and generates a response signal to separate the matching (resonance) and signal separation of the charging circuit module unit installed in the battery pack. It transmits to the circuit part (221,222). In this case, the signal separation circuit unit 222 controls the response signal so that there is no attenuation and error of the signal due to the influence of other circuits, and then transfers the response signal back to the RFID reader 300 through the RFID antenna 241.

In addition, as shown in FIG. 9, a charging circuit module is formed of the power conversion circuit unit 223, the battery charging circuit unit 224, and the battery protection circuit unit (PCM) 225, and the battery pack 210 is configured and moved. The smart card, the smart IC chip 110, and the matching (resonance) and signal separation circuit sections 221 and 222 can be configured in the communication terminal main body 100.

Here, the RFID communication signal transmitted from the RFID antenna 241 can be directly transmitted to the matching (resonance) and signal separation circuits 221 and 222 of the main body of the mobile communication terminal without passing through the battery pack 210.

As shown in FIG. 10, only the battery protection circuit unit (PCM) 225 is configured in the battery pack 210, and the matching (resonance) and signal separation circuit units 221 and 222, the power conversion circuit unit 223, and the battery charge are performed. The charging circuit module including the circuit unit 224 may be configured on one side of the smart card and the smart IC chip of the mobile communication terminal body.

Here, the RFID communication signal transmitted from the RFID antenna 241 is transferred directly to the matching (resonance) and signal separation circuit units 221 and 222 of the mobile communication terminal body 100 without passing through the battery pack, and the battery charging circuit unit 224. The battery may be charged by transferring a voltage and a current generated by the power supply to the battery protection circuit unit (PCM) 225.

As shown in Fig. 11, the battery pack 210 includes a charging circuit module composed of matching (resonance) and signal separation circuit sections 221 and 222 and a battery protection circuit section (PCM) 225, and the power conversion circuit section. 223 and the battery charging circuit unit 224 can be configured on one side of the smart card and smart IC chip 110 of the mobile communication terminal body.

Here, the matching (resonance) and signal separation circuit unit (221, 222) receives the RFID communication signal from the battery pack 110 and transmits to the smart card and smart IC chip 110 embedded in the mobile communication terminal (100). In addition, the smart card and smart IC chip 110 installed in the mobile communication terminal main body 100 analyzes and processes the RFID communication signal and generates a response signal to match the charging circuit module unit installed in the battery pack 210 (resonance). Send to the signal separation circuit section (221, 222). At this time, the signal separation circuit unit controls the response signal so that there is no attenuation and error due to the influence of other circuits, and then transfers the signal back to the RFID reader 300 through the RFID antenna 241, and transmits a battery charging signal to the mobile communication terminal. The battery can be charged by transferring it to the power conversion circuit unit.

The ferrite sheet 230 is formed in an unfolded shape between the battery cell and the flexible printed circuit board (FPCB), disposed at the upper end of the battery cell to remove radio waves and noise of several tens of MHz to several GHz, and through the charging circuit module The ferrite sheet used in the present invention is made of a magnetic material. The ferrite sheet used in the present invention is formed of a thin steel sheet having a use frequency of 5 kHz to 2 MHz and a capacity of 5 W to 100 W. These ferrite sheets have lower thermal resistance than conventional wire-wound transformers, can significantly reduce weight and size than wire-wound products (approx. 1cc per 40W), and efficiency is 10% higher than conventional wire-type transformers. It is improved and has the property of minimizing low leakage inductance and electromagnetic interference.

In the present invention, an absorber and a flex-suppressor may be used instead of the ferrite sheet.

The flexible printed circuit board (FPCB) 240 serves to prevent disconnection of the copper wire pattern serving as an antenna, which is installed on the ferrite sheet as shown in FIG. 2 to provide information with an external RFID reader. The 13.56 MHz RFID antenna 241 and the RF power receiving antenna 242 are formed on the same line along the edge of the flexible printed circuit board (FPCB) to allow wireless charging while simultaneously transmitting and receiving.

Here, the reason why the 13.56 MHz RFID antenna and the RF power receiving antenna may be formed on the same line along the circumference of the flexible printed circuit board (FPCB) 240 is the flexible printed circuit board (FPCB). This is because the signal separation circuit unit of the charging circuit module installed at the bottom of the signal necessary for RFID communication, and the signal necessary for charging the battery can be delivered to the power conversion circuit unit.

In the present invention, as shown in FIG. 15, only 13.56 MHz RFID antenna 241 is wired around the edge of the flexible printed circuit board (FPCB) so as to perform only a function of transmitting and receiving information with an existing external RFID reader. Where the wire is formed, the 13.56 MHz RFID antenna 241 can be configured to have a function of the RF power receiving antenna 242 to perform wireless charging.

The reason for this is that the charging circuit module includes a matching (resonance) and signal separation circuit unit 221 and 222, a power conversion circuit unit 223, a battery charging circuit unit 224, and a battery protection circuit unit (PCM) 225 on one side of the main body of the mobile communication terminal ( When the 220 is installed as an IC chip, the matching (resonance) and signal separation circuits 221 and 222) generate resonance current by RF resonance of the radio wave induced from the RFID reader 300, and at the same time, a signal necessary for RFID communication Since only a signal required for charging the battery can be separated and transferred to the power conversion circuit unit, the existing 13.56 MHz RFID antenna 241 can be converted into an RF power reception-only antenna 242.

Next, a 13.56 MHz RFID antenna is wired around the edge of the flexible printed circuit board (FPCB) 240 according to the present invention, and the RF power receiving antenna 242 is along the center of the RFID antenna 241. Next, the structure of the hybrid antenna 240a in which the wires are further wired and separated by lines will be described.

3 shows an RFID antenna 241 is wired around the edge of a flexible printed circuit board (FPCB) 240 according to the present invention, and the RF power receiving antenna 242 along the center of the RFID antenna 241. ) Is a perspective view showing a hybrid antenna 240a structure in which the wires are further wired in a spiral shape and separated from each other. The battery cell 210, the charging circuit module 220a, the ferrite sheet 230, It consists of a flexible printed circuit board (FPCB) 240.

The battery cell 210 and the ferrite sheet 230 have the same configuration as described above.

As shown in FIG. 12, the charging circuit module 220a is formed of a PCB substrate, connected to one side of a battery cell to separate an RFID communication signal and a battery charging signal, generate an induced current, and a voltage and current suitable for a battery. To generate and charge, which is shown in Figure 12, the first antenna matching (resonance) circuit unit 220a-1, the second antenna matching (resonance) circuit unit 220a-2, power conversion circuit unit 220a- 3), the battery charging circuit unit 220a-4 and the battery protection circuit unit (PCM) 220a-5.

The first antenna matching (resonance) circuit unit 220a-1 receives an RFID communication signal transmitted from an RFID antenna among radio waves induced from an RFID reader and transmits the received RFID communication signal to a smart card and a smart IC chip in the main body of the mobile communication terminal. do.

The second antenna matching (resonance) circuit unit 220a-2 receives a battery charging signal transmitted from the RF power receiving antenna during transmission induced by the FID reader and transmits the received signal to the power conversion circuit unit.

The power conversion circuit unit 220a-3 receives the battery charging signal from the second antenna matching (resonance) circuit unit 220a-2 and generates a DC voltage that can be charged.

 The battery charging circuit unit 220a-4 generates a voltage and a current suitable for the battery power source 4.2 V using the induced current generated through the power conversion circuit unit.

The battery protection circuit unit (PCM) 220a-5 prevents overvoltage charging and overdischarging when the voltage and current generated from the battery charging circuit unit are charged in the battery.

The flexible printed circuit board (FPCB) 240 serves to prevent disconnection of a copper wire pattern serving as an antenna, which is installed on the ferrite sheet as shown in FIG. 3 to provide information with an external RFID reader. An RFID antenna is wired around the edge of the flexible printed circuit board (FPCB) to allow wireless charging while simultaneously transmitting and receiving, and an additional RF power receiving antenna is spirally wired along the center of the RFID antenna. ) To form a line-separated hybrid antenna 240a.

As shown in FIG. 3, the RF power receiving antenna is wired in a spiral shape to form an induction coil.

As such, the RFID antenna 241 and the RF power receiving antenna 242 are integrally formed in the flexible printed circuit board (FPCB) 240, so that the RFID communication signal and the wireless charging signal transmitted to the external RFID reader without the signal separation circuit part. By correctly identifying the signal separation circuit unit of the charging circuit module installed on the bottom of the flexible printed circuit board (FPCB) it is possible to separate the signal necessary for RFID communication and the signal for charging the battery and transmit it to the power conversion circuit unit.

In addition, as the RF power receiving antenna is formed in a spiral or optimal shape along the edge of the RFID antenna, as shown in FIG. 5, as shown in FIG. 5, induction radio waves generated from the RF power receiving antenna are RF power receiving antennas in the battery cells. Secondary induction reverse propagation that hinders the generation of charging efficiency is reduced, preventing RFID communication failure due to reverse propagation, and by eliminating high frequency nose to minimize the loss of power consumption can maximize the efficiency of the induced current. .

Hereinafter, a process in which the RF power receiving antenna forms a suitable induction coil of a spiral or structure along the edge of the RFID antenna and the best induction current is generated by the ferrite sheet will be described in detail.

For example, the primary inductance (L _pri : primary inductance) generated in the spiral induction coil through the maximum frequency 140kHz driven by the RF power receiving antenna can be expressed as Equation 2, for example.

Here, I _PK is the peak (highest point) current flowing in the induction coil of the RF power receiving antenna when the steady state, and V _i (min) is the lowest DC voltage input from the flexible printed circuit board (FPCB).

When a low input voltage flows after a predetermined time has passed through the induction coil of the RF power receiving antenna, the maximum magnetic flux density [B _max (Io): maximum operating magnetic flux density] transmitted to the ferrite sheet formed at the upper end of the induction coil is For example, it can be expressed as Equation 3.

Here, Bsat (min) represents the magnetic flux density accumulated on the low input voltage of the ferrite sheet (100 占 폚) which is the material of the present invention.

In addition, using the initial inductance and the maximum magnetic flux density as described above, the minimum gap spacing (I _g ) between the induction coils attached to the RF power receiving antenna of the flexible printed circuit board (FPCB) can be expressed as Equation 4 as an example. There is a number.

Here, Ac relates to the cross-sectional area of the induction coil occupying one side of the flexible printed circuit board (FPCB).

Using this characteristic, the gap between the induction coils I _g of the induction coil according to the present invention is 0.04 to 0.5 cm, and is helically attached to the center portion of the flexible printed circuit board (FPCB) as shown in FIG. 3.

Here, in the present invention, by forming a ferrite sheet on the lower side of the induction coil, high frequency noise can be removed, thereby preventing the loss of power consumption, thereby increasing the efficiency of the induction current.

Hereinafter, a detailed operation process of the mobile terminal battery charging apparatus using the radio frequency of the RFID reader according to the present invention will be described.

As shown in FIG. 8, RF radio waves radiated from the RFID reader reach the antenna of the mobile communication terminal, and the signals reached here are arranged on the same line along the edge of the flexible printed circuit board (FPCB). It is guided to the Wiring 13.56 MHz RFID antenna and the RF power receiving antenna and transferred to the matching circuit of the charging circuit module.

The matching (resonance) circuit portion is to perform the frequency selection function to generate the best induced current by the induced radio waves to generate the maximum efficiency, and at the same time the RFID communication between the RFID reader and the mobile communication terminal.

When the maximum resonance is made in the matching (resonance) circuit portion, it is possible to generate the maximum induced current and to transmit the best RFID communication state.

Subsequently, the maximum resonance made in the matching (resonance) circuit part separates the signal necessary for RFID communication from the signal separation circuit part and the signal necessary for charging the battery and transmits the signal to the power conversion circuit part.

Subsequently, the signal separation circuit unit not only prevents the RFID communication from being disturbed due to the attenuation of the signal generated by the power conversion circuit unit and the battery charging circuit unit, and the RF communication signal generated by the mobile communication terminal is normal. It serves to radiate to the RFID reader.

Subsequently, when continuously charging the RFID reader, communication between the RFID reader and the mobile terminal is undesirably generated, so that the communication function with the RFID reader can be temporarily suspended or separated from the mobile terminal program.

Subsequently, signals necessary for RFID communication among the signals separated by the matching (resonance) and signal separation circuit unit analyze and process the RFID communication signals through smart cards and smart IC chips built in the mobile communication terminal, and then generate response signals. To the matching (resonance) and signal separation circuitry. The signal separation circuit unit controls the response signal so that there is no attenuation and error of the signal due to the influence of other circuits, and then transmits the response signal to the RFID reader through the antenna.

In addition, the signal for charging the battery among the signals separated by the signal separation circuit unit is transferred to the power conversion circuit to generate an induced current, the generated induced current generates a voltage, current suitable for the battery in the battery charging circuit.

Subsequently, the voltage and current generated by the battery charging circuit unit charge the battery through the battery protection circuit PCM.

In another embodiment, as shown in FIG. 12, since the RFID communication antenna line and the charging antenna line are separated, the signal separation circuit unit is not required.

Since the antenna lines are separated, the antenna lines are resonated through resonant circuits required for each antenna line in order to obtain the highest resonance efficiency.

If continuous charging with the RFID reader occurs undesirably, communication between the RFID reader and the mobile terminal occurs, so that the communication function with the RFID reader can be temporarily suspended or separated from the mobile terminal program.

As described above, in the present invention, by using the RF resonance characteristics, the power battery can be converted to the power that can be charged with the maximum power transfer efficiency, and charged to the battery, and the RFID communication can be operated normally.

By using the 13.56Mhz RFID antenna currently used in the mobile communication terminal, it is possible to immediately apply this technology by maintaining the compatibility with the existing environment and not requiring a separate antenna development.

In addition, by having a hybrid antenna that can produce RFID communication and inductive power by integrally configuring the antenna, it is possible to charge freely without a separate charging device wherever an RFID reader terminal is currently installed worldwide. While using RFID communication, there is a good effect of automatically charging the battery.

Claims (6)

Battery pack for charging the battery cell 210 using the power induced by the antenna of the mobile communication terminal main body 100 and the flexible printed circuit board (FPCB) while being detached from one side of the mobile communication terminal main body 100 In the mobile communication terminal consisting of 200, The battery pack 200 is provided with a battery cell 210 having both terminals and a negative terminal and charging and discharging power induced through an antenna of a flexible printed circuit board (FPCB), and one side of the battery cell 210. The charging circuit module 220 is connected to the separation of the RFID communication signal and the battery charging signal, generates an induced current, and generates and charges a voltage, current suitable for the battery is formed of a PCB substrate, the battery cell 210 The ferrite sheet 230 is formed on the upper end to remove radio waves and noise of several tens of MHz to several GHz, and to increase the efficiency of the induction current flowing through the charging circuit module to the battery cell, and the upper portion of the ferrite sheet 230. 13.56MH installed on the same line along the periphery of the flexible printed circuit board (FPCB) 240 so as to allow wireless charging while simultaneously transmitting and receiving information with the external RFID reader 300. z the RFID antenna 241 and the RF power receiving antenna 242 are formed by wiring; The smart card for analyzing the RFID communication signal transmitted from the charging circuit module 220 of the battery pack 200 to the mobile communication terminal main body 100, processing and generating a response signal and transmitting the response signal to the charging circuit module 220. And a smart IC chip (110) embedded therein, the apparatus for charging a mobile communication terminal battery using a radio frequency of an RFID reader. The method of claim 1, wherein the charging circuit module 220 Matching (resonance) and signal separation circuit sections (221, 222) for generating an induced current by RF resonance of the radio waves induced from the RFID reader and separating the signals necessary for RFID communication and the signals required for battery charging and transferring them to the power conversion circuit section. , A power conversion circuit unit 223 for receiving a battery charging signal from the signal separation circuit unit 222 and generating a DC voltage that can be charged; A battery charging circuit unit 224 for generating a voltage and a current suitable for the battery power source (4.2V) by using the induced current generated through the power conversion circuit unit 223; The radio frequency of the RFID reader, comprising a battery protection circuit unit (PCM) 225 that prevents the voltage and current generated from the battery charging circuit unit 224 to be over-voltage charged and over-discharged when the battery is charged. Mobile communication terminal battery charging device using. The signal separation circuit unit 222 of claim 2, when the signal 1 (SIG1), the signal 2 (SIG2), which is the RFID signal selected by the matching (resonance) circuit unit is input, power conversion of the RFID signal through the capacitors C7, C8 Transfers to the circuit part, and converts the signal supplied by the capacitors C7 and C8 to DC by diodes D1, D2, D3, D4 and capacitor C9, and smooths through capacitor C11 to connect the hybrid antenna or the charge-only antenna. In order to increase the frequency selectivity of the antenna, it prevents overcurrent from flowing in the circuit when the current is supplied to the charging circuit through the resistor R1, and damages the charging circuit due to surge or overvoltage through the capacitor C10 and the diode D5. Mobile communication terminal battery charging apparatus using a radio frequency of the RFID reader, characterized in that configured to prevent the. Battery pack for charging the battery cell 210 using the power induced by the antenna of the mobile communication terminal main body 100 and the flexible printed circuit board (FPCB) while being detached from one side of the mobile communication terminal main body 100 In the mobile communication terminal consisting of 200, The battery pack 200 is provided with a battery cell 210 having both terminals and a negative terminal and charging and discharging power induced through an antenna of a flexible printed circuit board (FPCB), and one side of the battery cell 210. A charging circuit module (220a) connected to the separation of the RFID communication signal and the battery charging signal, generates an induced current, and generates and charges a voltage, current suitable for the battery is formed of a PCB substrate, the battery cell 220 The ferrite sheet 230 is formed on the upper end to remove radio waves and noise of several tens of MHz to several GHz, and to increase the efficiency of the induction current flowing through the charging circuit module to the battery cell, and the upper portion of the ferrite sheet 230. The RFID antenna 241 is installed along the circumference of the flexible printed circuit board (FPCB) 240 to allow wireless charging while simultaneously transmitting and receiving information with the external RFID reader 300. And wiring (Wiring), that along the central portion of the RFID antenna 241, the RF power receiving antenna 242, a wiring (Wiring) further in a spiral shape is formed in the hybrid antenna (240a), the separation line; The mobile communication terminal main body 100 analyzes the RFID communication signal transmitted from the charging circuit module 220a of the battery pack, generates a response signal after processing, and transmits the smart card and the smart IC to the charging circuit module 220a. Mobile communication terminal battery charging device using a radio frequency of the RFID reader, characterized in that the chip 110 is built-in. The smart card and smart IC of claim 3, wherein the charging circuit module 220a receives the RFID communication signal transmitted from the RFID antenna 241 of the radio wave induced from the RFID reader 300. A first antenna matching (resonance) circuit unit 220a-1 transmitting to the antenna; A second antenna matching (resonance) circuit unit 220a-2 that receives the battery charging signal transmitted from the RF power receiving antenna during transmission induced from the FID reader and transmits it to the power conversion circuit unit; A power conversion circuit unit 220a-3 which receives a battery charging signal from the second antenna matching (resonant) circuit unit 220a-2 and generates a DC voltage that can be charged; A battery charging circuit unit 220a-4 which generates a voltage and a current suitable for the battery power source (4.2V) by using the induced current generated through the power conversion circuit unit 220a-3; RFID reader, characterized in that the battery protection circuit unit (PCM) 220a-5 that prevents the voltage and current generated from the battery charging circuit unit 220a-4 to be over-voltage charged and over-discharged when the battery is charged Mobile terminal battery charging device using a radio frequency of A charging circuit module 220 including a matching (resonance) and signal separation circuit unit 221, 222, a power conversion circuit unit 223, a battery charging circuit unit 224, and a battery protection circuit unit (PCM) 225 on one side of a mobile communication terminal main body. Installed with an IC chip, and the matching (resonance) and signal separation circuit sections 221 and 222) RF-resonates the radio wave induced from the RFID reader 300 to generate an induced current, and at the same time, down the signal required for RFID communication, Mobile communication terminal battery charging using the radio frequency of the RFID reader, characterized in that configured to convert only the signal necessary for charging and transfer to the power conversion circuit unit 13.56MHz RFID antenna 241 to the RF power receiving antenna 242. Device.

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