KR100564256B1 - Wireless charging pads and battery packs with radio frequency identification technology - Google Patents

Abstract

The present invention can recognize the state of charge of the battery pack in real time, and means for immediately detecting the device mounted therein is implemented, a number of battery packs are put on the wireless charging pad or the foreign matter that can not be charged The present invention relates to a wireless charging pad and a battery pack to which radio frequency identification technology is applied, which enables an efficient response.

RFID, radio frequency identification, wireless charging pad, contactless charging, battery pack

Description

WIRELESS CHARGING PAD AND BATTERY PACK APPLIED RADIO FREQUENCY IDENTIFICATION TECHNOLOGY}             

1 is a block diagram of a battery pack that is contactlessly charged by a wireless charging pad according to the present invention.

Figure 2 is an overall configuration of a contactless battery charging system consisting of a wireless charging pad and a battery pack according to the present invention.

3a to 3c are views for explaining the components of the wireless charging pad or battery pack according to the present invention.

4 is a view showing a magnetic field generating method according to a switching pattern of a pad for wireless charging according to the present invention.

5 is a view showing the size expansion of the wireless charging pad according to the number of charging devices according to the present invention.

Figure 6a is a detailed configuration of a contactless battery charging system consisting of a wireless charging pad and a battery pack according to the present invention.

6B is a flowchart of a battery charging method performed through the wireless charging pad of FIG. 6A.

7A and 7B are diagrams illustrating equivalent circuits of a series resonant converter and a parallel resonant converter provided in the pad for wireless charging according to the present invention, respectively.

8A to 8F are diagrams illustrating operations of respective modes of a half-bridge series resonant converter provided in a pad for wireless charging according to the present invention.

FIG. 9 is a diagram illustrating voltage and current waveforms of a transformer according to a gate signal of a half-bridge series resonant converter provided in a pad for wireless charging according to the present invention. FIG.

10 is a view showing a rotation direction of the magnetic field according to the operation of each mode of the half-bridge series resonant converter provided in the pad for wireless charging according to the present invention.

11A to 11D illustrate a rectifier circuit of a charging receiver module according to the present invention.

12 is a block diagram of a controller provided in the pad for wireless charging according to the present invention.

FIG. 13 is a view illustrating RF singnal flow between a wireless charging pad and a battery pack according to the present invention. FIG.

Explanation of symbols on the main parts of the drawings

100: Battery Pack 110: Charging Receiver Module

120: charging protection circuit module 121, 121 ': rectifier circuit

122: charge control circuit 123: fuel gauge

124: protection circuit

130: RFID Tag (RFID Tag)

131: Clock Extractor 132: Sequencer

133: Data Encoder 134: ROM

135: TAG 136: Data Modulator

140: EMI Protector 150: Battery Case

BAT: Battery

TA: Tag Antenna Scoil1, Scoil2: Secondary Coil

200: wireless charging pad 210: AC / DC conversion circuit

210 ': flyback converter 220, 220': drive circuit

230, 230 ': Inductive Coupler

240: controller

241: Oscillator 242: Antenna Driver

243: demodulator 244: filter &

245: Data Decoder 246: Driver Controller

247: display unit 248: timer

249: reset unit 250: EMI filter

RA: Reader Antenna Pcoil1, Pcoil2: Primary Coil

The present invention relates to a wireless charging pad and a battery pack to which a radio frequency identification technology is applied, and more particularly, means for recognizing a state of charge of a battery pack in real time and immediately detecting a device mounted therein. The present invention relates to a wireless charging pad and a battery pack to which a radio frequency identification technology is applied, which enables an efficient response when a plurality of battery packs are placed on a wireless charging pad or a foreign material that cannot be charged.

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. In order to solve the problem of the contact type charging method or the contact type charging method due to exposure of the contact terminals to the outside, a contactless charging method of charging a portable device using a magnetic coupling without electrical contact is 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, published in Korean Patent Application Publication No. 2002-0035242. The method of charging by communication, the prior application published in the Patent Publication No. 2002-0057469 published a 'circuit-free ultra-thin printed circuit board transformer and a solid-state battery charger using the printed circuit board transformer,' winding the printed circuit board (PCB: Printed A method of solving a problem of a magnetic core using a transformer formed on a circuit board has been proposed.

The present applicant constitutes a wireless charging pad that performs the function of a contactless charger through the previously-applied "multi-charging contactless battery charging system and a core block design method thereof" (Application No. 2004-21335) and the like. In addition, a technology for charging a contactless state by placing a battery pack of a portable device on a wireless charging pad has been proposed.

However, the conventional technology cannot recognize the state of charge of the battery pack on the wireless charging pad side in real time, and means for immediately detecting a device mounted on the wireless charging pad side is not implemented, so that a plurality of battery packs are implemented. There was a problem that it is difficult to cope with the case that is placed on the wireless charging pad or a foreign material that is impossible to charge.

Accordingly, an object of the present invention is to solve the conventional problems as described above, means that can recognize the state of charge of the battery pack in real time, and means for immediately detecting the device mounted therein is implemented, An object of the present invention is to provide a wireless charging pad and a battery pack to which a radio frequency identification technology is applied to enable an efficient response, such as when a battery pack is placed on a wireless charging pad or a foreign material that cannot be charged.

Wireless charging pad to which the radio frequency identification technology is applied according to the present invention for achieving the above object, in the wireless charging pad 200 for contactless charging the battery pack 100 mounted on a portable device, power saving mode Waiting at, and when the approach of the battery pack 100 is detected, it switches to an operation mode to control the drive circuits 220 and 220 ′, and sends an RF carrier signal to the battery pack 100 in the operation mode. Transmits, and receives modulated RF data including the radio identification information and the charging state information of the battery pack 100 through the reader antenna RA in response to charging the battery pack 100. It displays the status, and when the charging of the battery pack 100 is finished, the controller 240 is switched to the power saving mode again, and the two primary coils (Pcoil1, Pcoil2) under the control of the controller 240, respectively Switched by the drive circuit 220, 220 'and the drive circuit 220, 220' for switching to generate an induction electromotive force to charge the battery pack 100, made of a cobalt-based amorphous metal or ferrite material And a primary transformer formed by winding two primary coils Pcoil1 and Pcoil2 in a 90-degree direction on the pad cores, each of which has a small square plate or rectangular shape. .

Preferably, when the plurality of battery packs 100 are placed, the controller 240 reads the wireless identification information and the charging state information in the order of being displayed to display the state of charge for each battery pack 100. And, when the charging of all the battery pack 100 is completed, the state is switched to the power saving mode.

Preferably, the controller 240 uses an oscillator 241 for generating an oscillation signal of a predetermined frequency and an oscillation signal of the oscillator 241 as a clock, and an RFID carrier via a reader antenna RA. After the wireless transmission of the signal to the outside (return) to check the presence of the signal to monitor the approach of the battery pack 100, and as the battery pack 100 approaches the battery in response to the RF carrier signal The antenna driver 242 wirelessly receives the modulated RF data including the radio identification information and the charging state information of the pack 100 through the reader antenna RA, and the RF data received by the antenna driver 242. A demodulator 243 for demodulating and a filter and amplifying unit 244 for filtering and amplifying the radio identification information and the charging state information from the data demodulated by the demodulator 243. And a data decoder 245 for decoding the radio identification information and the charging state information received from the filter and amplifying unit 244, and a display unit 247 for displaying the data decoded by the data decoder 245. It is configured by.

Preferably, the drive circuit (220, 220 ') is composed of two half-wave series-parallel resonant converter to control the orthogonal primary coil (Pcoil1, Pcoil2), respectively, each primary coil (Pcoil1, The switching pattern of Pcoil2 is switched at a frequency higher than the resonance point so that the phase difference is 90 degrees, and the interlinked magnetic flux is 180 degrees → 135 degrees → 90 degrees → 45 degrees → 0 degrees → -45 degrees → -90 degrees The direction is changed by rotating 360 degrees in the direction of −135 degrees, thereby generating a magnetic field that is rotated 360 degrees.

Preferably, an AC / DC conversion circuit coupled to a power input terminal to block electromagnetic waves of the input AC power, and an AC / DC conversion circuit receiving AC power cut off from the electromagnetic filter 250 to rectify the DC. 210 and coupled to the AC / DC conversion circuit 210 and the controller 240 accumulate power while the built-in transistor is in an on state and transfer the accumulated power to the controller 240 at the moment it is turned off. And further includes a flyback converter 210 'for driving the drive circuits 220 and 220'.

Preferably, the wireless charging pad 200 has an input port that can be coupled to at least one of an AC adapter, a USB port, a vehicle cigar jack.

In addition, the battery pack to which the radio frequency identification technology according to the present invention is applied is a battery pack (B) that is mounted on a portable device and is contactlessly charged by a wireless charging pad (A), the flat plate made of amorphous metal and the A charging receiver module 110 composed of two secondary coils (Scoil1 and Scoil2) wound around a plate core in a vertical direction and a horizontal direction, and magnetically coupled with the wireless charging pad 200 to induce power; Combined with the charging receiver module 110 and the battery BAT, the charging state information generated by periodically monitoring the charging state of the battery BAT is recorded in the RFID tag 130, the RFID tag 130 A charging protection circuit for controlling whether the battery BAT is charged or discharged by supplying or blocking power induced in the charging receiver module 110 to the battery BAT according to on / off control of the battery BAT. 120 and the wireless protection information of the battery BAT is coupled to the charging protection circuit module 120 and the charging state information is periodically recorded, and the wireless charging is performed through the tag antenna TA. When the RF carrier signal is transmitted from the pad 200, the wireless charging pad 200 generates the modulated RF data by generating and modulating the RF data including the radio identification information and the charging state information of the battery BAT. The RFID tag 130 to be transmitted to, and characterized in that it comprises a battery (BAT) that is charged according to the control of the protection circuit 124.

Preferably, the temperature between the battery BAT and the charging receiver module 110 is magnetically blocked to minimize the temperature increase of the battery BAT due to induction heating and frequency interference caused by a radio signal or induction electromotive force. An amorphous metal-based electromagnetic wave protector 140 is further provided.

Preferably, the induction electromotive force is made of a cool polymer material to perform an exothermic action of releasing heat generated therein due to charging while passing through the outside, and the outside of the structure assembled by combining the above components with each other. There is further provided a battery case 150 to surround the whole.

Preferably, the charging protection circuit module 120, the rectifier circuit (121, 121 ') for rectifying the power induced by the charging receiver module 110 to supply to the charge control circuit 122, and the rectification A charge control circuit coupled to the circuits 121 and 121 'and supplying the rectified power from the rectifier circuits 121 and 121' to the fuel gauge 123 according to on / off control of the RFID tag 130 ( 122 and supplies the power supplied from the charge control circuit 122 to the battery BAT through the protection circuit 124, and monitors the charging state of the battery BAT to generate charge state information. Fuel gauge 123 is periodically recorded on the RFID tag 130, and coupled to the fuel gauge 123 and the battery BAT to control the charging and discharging according to the charging state of the battery (BAT) And a protection circuit 124 for protecting the battery BAT.

Preferably, the rectifier circuits 121 and 121 'are a series / parallel resonance center-tap half-bridge rectifier circuit or a full-bridge rectifier diode output using one center-tap rectifier diode output and an output filter capacitor. It is a series / parallel resonance full bridge rectifier circuit using an output filter capacitor.

Preferably, the RFID tag 130 includes a clock extractor 131 for extracting a clock from the RF carrier signal wirelessly received from the wireless charging pad 200 and the clock extractor 131. The sequencer 132 which transmits a control signal to the data encoder 133 by checking the sequence of the extracted data and, when the control signal is transmitted from the sequencer 132, wirelessly identifies the battery BAT from the tag 135. After receiving and encrypting the information and the charging state information, the data encoder 133 transmits the data modulator 136 and modulates the data received from the data encoder 133 to generate modulated RF data. A data modulator 136 for wireless transmission to the pad 200, a ROM 134 for recording wireless identification information and a charge state information of the battery BAT, and the ROM stored in the ROM 134. Read the radio identification information and the charge information of the battery (BAT) is configured to include a tag 135 to be transmitted to the data encoder 133.

Preferably, the wireless identification information, the product name of the battery (BAT), the serial number (serial number) of the battery (BAT), the main body of the portable device on which the battery pack 100 and the battery pack ( At least one of user identification numbers stored in the RFID tag 130 through communication of 100).

Preferably, the RF carrier signal is a wireless identification signal stored in the battery pack 100 at a carrier frequency of the HF (3 ~ 30MHz, high frequency, shortwave) or UHF (300 ~ 3000MHz, ultra high frequency, microwave) band ( It is a signal to access (RFID Signal).

In the following description of the preferred embodiments of the present invention in detail with reference to the accompanying drawings, when it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Do it.

1 is an overall configuration diagram of a battery pack that is contactlessly charged by a wireless charging pad according to the present invention.

Referring to FIG. 1, the battery pack 100 is provided with secondary coils Scoil1 and Scoil2, and receives the induction electromotive force from the wireless charging pad 200 (see FIG. 2) that is the primary side. Charging protection circuit module 120 and battery BAT with fuel gauge function and charging function, RFID tag 130 (refer to FIG. 2) and tag antenna TA for transmitting and receiving radio signals, battery (BAT) and an electromagnetic protector, which is an amorphous metal-based blocker that magnetically blocks the charge receiver module 110 so as not to affect the inductive coupling with the wireless charging pad 200 (see FIG. 2). 140 and the like.

The electromagnetic wave protector 140 is made of an amorphous metal-based magnetic material to eliminate frequency interference caused by radio signals and induction electromotive force in the magnetic field, and is generally a battery of induction heating in the magnetic field due to the case of the battery BAT. It must be inserted as it serves to minimize the rise in temperature of (BAT).

The battery pack 100 combines all components such as the charging receiver module 110, the charging protection circuit module 120, the battery BAT, the electromagnetic wave protector 140, and assembles into one structure, and then the outside of the battery pack 100 is assembled. The battery case 150 may be further provided to surround the battery. In this case, the battery case 150 is made of a cool polymer material such as cobalt (Co) or nickel (Ni), and generates heat generated by charging while passing induction electromotive force or electromagnetic wave as it is. To perform the action.

2 is an overall configuration diagram of a contactless battery charging system composed of a wireless charging pad and a battery pack according to the present invention.

Referring to FIG. 2, a pointless battery charging system including a wireless charging pad and a battery pack according to the present invention includes a wireless charging pad 200 and a wireless charging pad 200 that perform a function of a contactless charger. It is separated into a battery pack 100 that is charged by receiving the induced power through. A separate transformer is configured between the wireless charging pad 200 and the battery pack 100 so that the primary side is provided in the wireless charging pad 200 and the secondary side is provided in the battery pack 100, respectively.

The battery pack 100 includes a charging receiver module 110, a charging protection circuit module 120, an RFID tag 130, a tag antenna TA, a battery BAT, and the like, which become a transformer secondary side.

The charging receiver module 110 receives the induced power from the wireless charging pad 200 and supplies it to the charging protection circuit module 120.

The charging protection circuit module 120 including the fuel gauge function and the charging function performs an AC / DC conversion to rectify the power supplied from the charging receiver module 110, and includes lithium ion or lithium. Switch mode charging control circuit 122 for charging a battery BAT made of a polymer with CC / CV [CV is a constant voltage, CC is a constant current], the charging of the battery (BAT) It is made of a protection circuit 124 for protecting the battery BAT by determining the state to determine the supply and interruption of the power supplied to the battery BAT from the charge control circuit 122. The charging protection circuit module 120 uses the output of the charging receiver module 110 as the input of the rectifier circuits 121 and 121 ', and the output of the rectifying circuits 121 and 121' controls the switch mode charge control. It is configured to be connected to the input of the circuit 122. The output of the charge control circuit 122 is configured to be connected to the fuel gauge 123, and the fuel gauge 123 is connected to the protection circuit 124 which protects the battery BAT from overcharge and overcurrent. These components are mounted in the battery pack 100 of the portable device, and can be applied to both a hard pack and an inner pack according to the type of the battery pack 100.

The wireless charging pad 200, which operates as a contactless charger, has various input ports having a DC input, so that various types of external power sources (for example, an output of an AC adapter, a USB port of a computer, or a cigar jack of a car, etc.) Can be used in connection. The wireless charging pad 200 has a built-in transformer primary side and uses a half-bridge resonant converter to switch to a frequency higher than the resonance point to reduce switching loss through zero voltage zero current soft switching. The interlinked magnetic flux is induced to the battery pack 100 of the secondary portable device. In addition, when the battery pack 100 having the built-in charging receiver module 110 is placed on the wireless charging pad 200, the wireless identification information of the battery BAT is recognized and the charging status information is wirelessly charged through wireless communication. A function of displaying on the pad 200 and a function of entering a shutdown mode and a power saving mode when a foreign material is raised are built in. In addition, when a plurality of portable devices are placed on the wireless charging pad 200, the wireless charging pad 200 reads wireless identification information (for example, a personal phone number, etc.) stored in the RFID tag 130, respectively. After displaying on the display, the charging state is displayed at the same time, and receives the information that the charging is completed from the battery pack 100 to display the charging completion state on the wireless charging pad 200.

The RFID tag 130 and the tag antenna TA are interfaced with the fuel gauge 123 that manages the charging status information of the battery BAT, and thus the charging status information of the battery BAT is transferred to the wireless charging pad 200. (13.56MHz), UHF (900MHz) Radio Frequency (Radio Frequency) of the band (Radio Frequency) is used to transmit the radio data. The RFID tag 130 is composed of a memory block and a logic block, and stores wireless identification information such as a product name, a serial number, a user identification number (eg, a personal phone number), and the like. Here, the user identification number is stored in the memory block of the RFID tag 130 through communication between the terminal body of the portable device and the battery pack 100.

3A to 3B are views for explaining components of a wireless charging pad or battery pack according to the present invention.

Referring to FIG. 3A, the wireless charging pad 200 according to the present invention includes a controller 240, a drive circuit 220 and 220 ′, and a primary coil Pcoil1 which simultaneously perform an RFID tag reader function and a charge control function. , Pcoil2) and the like.

The wireless charging pad 200 may include various input ports having a DC input, generate a switching pattern of each of the primary coils Pcoil1 and Pcoil2 through the drive circuits 220 and 220 ', and perform wireless charging. It is responsible for the detection and power saving mode of the portable device placed on the pad 200 and a control function of displaying the state of charge of each device. The drive circuits 220 and 220 'are on / off switching elements for switching the respective primary coils Pcoil1 and Pcoil2, and are composed of an upper switch and a lower switch. The drive circuits 220 and 220 'are composed of half-bridge or full-bridge resonant converters (serial, parallel and series-parallel resonant converters).

Referring to FIG. 3B, the wireless charging pad 200 according to the present invention may be a cobalt-based amorphous metal or ferrite such as cobalt (Co), iron (Fe), nickel (Ni), boron (B), or silicon (Si). Two primary coils (Pcoil1, Pcoil2) are wound in a 90-degree direction in the direction shown in the drawing to form a transformer primary side on a plate core made of various pieces of small sized pieces of material. At this time, the switching pattern switches so that the two primary coils Pcoil1 and Pcoil2 have a 90 degree phase difference. Then, the charged receiver module 110 placed on the wireless charging pad 200 may receive the induced energy regardless of the position of the portable device having the battery pack 100 in which the charging receiver module 110 is mounted.

The input form of the wireless charging pad 200 is as follows.

110V / 220V combined direct drive method control power supply using the flyback converter (flyback converter) to make the drive power of the controller 240 and the drive circuit (220, 220 '). In the resonant converter, the DC power source rectified by the 110V / 220V switching method is always set to 110V input condition. Second, make DC power supply (12V, 24V, 48V) using AC86 ~ 265 freeback flyback converter for free voltage, and use it as input power of resonant converter. 240 and drive power for the drive circuits 220 and 220 '.

The controller 240 simultaneously performs a function of reading an RFID tag and a charging control function. The configuration is as follows.

First, the controller 240 is configured to recognize the battery pack 100 in which the charging receiver module 110 is embedded and to control the charging. Through the controller 240, wireless identification information such as a product code, a serial number, and the state of charge of the battery BAT are read from the RFID tag 130 of the battery pack 100. In addition, in the sleep mode (standby mode) (sleep mode: less than 1W) is set to monitor the battery pack 100, the battery pack 100 with a built-in charging receiver module 110 ) Is placed on the wireless charging pad 200 to wake up and switch to the operation mode to control the drive circuits 220 and 220 'to generate induction electromotive force, and start charging the battery pack 100. The state of charge of the battery pack 100 is displayed. When charging of the battery pack 100 ends, the wireless charging pad 200 is switched to the power saving mode again to save energy.

Second, when a plurality of battery packs 100 with a built-in charging receiver module 110 is placed on the wireless charging pad 200, first read the wireless identification information stored in the RFID tag 130 in the order in which they are placed Display. In addition, the fully charged battery pack 100 is displayed by a green LED (Light Emitting Diode), the discharged battery pack 100 is displayed by a red LED, when the full state of the RFID ID tag 130 of the wireless identification information Received by switching to the green LED to implement the charging state on the wireless charging pad 200.

The configuration of the drive circuits 220 and 220 'is as follows.

Two resonant converters control the orthogonal primary coils Pcoil1 and Pcoil2, respectively, so that the switching patterns of the respective primary coils are switched at a frequency higher than the resonance point so that there is a 90 degree phase difference. Then, the interlinked magnetic flux is rotated 360 degrees in eight steps, so that the charged magnetic flux can be charged regardless of the position where the battery pack 100 is placed.

The configuration of the transformer primary side is as follows.

Several small flat plate cores are connected to form an integral pad core of square and rectangular structure, wrapped with insulating tape, and then coiled vertically thereon and insulated with insulating tape thereon. Then, the coil is wound in the horizontal direction, and the insulation tape is wound on the insulation to produce a flat transformer primary side. In this case, the coil may be manufactured in a bobbinless type to insert the coil in a vertical direction and a horizontal direction on the pad core. On the secondary side, the charging receiver module 110 operates as the transformer secondary side.

3C illustrates the charging receiver module 110. The charging receiver module 110 is formed by stacking cores made of cobalt-based amorphous metal in multiple layers to form a single flat plate core, and a secondary coil (Scoil1, It is made by winding Scoil2) horizontally and vertically. Here, the plate core uses an amorphous metal based material having high permeability (> 80,000) and unbreakable properties. The charging receiver module 110 is characterized in that the intensity of the induced electromotive force changes according to a function relationship between the number of stacks of the flat core, the cross-sectional area, and the number of turns of the coil, and has a load curve in which the voltage and current are inversely related.

4 is a view illustrating a magnetic field generation method according to a switching pattern of a wireless charging pad according to the present invention.

In the wireless charging pad 200, when a current is applied by switching a section with a constant frequency in sequence from section 1 to section 2, section 3, section 4, section 5, section 6, section 7, section 8, and section 8. Rotates 360 degrees, when the portable device with the built-in charging receiver module 110 is placed on the wireless charging pad 200, it can be seen that charging is possible regardless of the position and direction (180 degrees to 135 degrees →). Magnetic field rotates from 90 ° to 45 ° to 0 ° to -45 ° to -90 ° to -135 °. At this time, the drive circuits 220 and 220 'are composed of two half-wave series-parallel resonant converters to control the orthogonal primary side coils Pcoil1 and Pcoil2, respectively, and each primary side coil Pcoil1 and Pcoil2. ), The switching pattern is switched at a frequency higher than the resonance point so that the phase difference is 90 degrees, and the interlinked magnetic flux is 180 degrees → 135 degrees → 90 degrees → 45 degrees → 0 degrees → −45 degrees → −90 degrees → Rotate 360 degrees in the direction of -135 degrees to generate a magnetic field that is rotated 360 degrees.

5 is a view showing the size expansion of the wireless charging pad according to the number of charging devices according to the present invention.

In the process of forming a pad core constituting the wireless charging pad 200, a plurality of small flat plate cores of cobalt-based metal or ferrite material may be attached to form a wireless charging pad 200 having a desired size and shape. For example, pad cores are made according to the number of portable devices to be charged by pasting m horizontally and vertically n pieces.

Figure 6a is a detailed configuration of a contactless battery charging system consisting of a wireless charging pad and a battery pack according to the present invention.

As illustrated, the wireless charging pad 200 on the primary side and the battery pack 100 in which the charging receiver module 110 on the secondary side are integrated are magnetically coupled.

,

를 각각 구비시켜 형성된 인덕티브 커플러(230, 230') 등으로 구성되어 있다. The primary wireless charging pad 200 includes a power supply input terminal, an AC / DC conversion circuit 210, a controller 240 for recognizing wireless identification information transmitted from the secondary side, and two half-wave parallel and parallel resonant converters. (Half-bridge serial-parallel resonant converter), drive circuits 220 and 220 'that generate magnetic signals by controlling two primary coils Pcoil1 and Pcoil2, respectively, Primary coils (Pcoil1, Pcoil2) are stacked in the vertical and horizontal directions to the primary transformer and the primary transformer

,

It consists of an inductive coupler (230, 230 ') and the like provided respectively.

In addition, an electromagnetic wave filter 250 coupled to a power input terminal to block electromagnetic waves of an input AC power, and an AC / DC conversion circuit 210 for receiving AC power cut off from the electromagnetic wave filter 250 and rectifying the DC power. Coupled to the AC / DC conversion circuit 210 and the controller 240, accumulates power while the built-in transistor is in an on state, and transfers the accumulated power to the controller 240 at the moment it is turned off to drive circuits 220 and 220. ') May be further provided with a flyback converter 210'.

The battery pack 100 of the secondary side is composed of a plate core made of amorphous metal and two secondary coils (Scoil1, Scoil2) wound in vertical and horizontal directions on the plate core, respectively, and are magnetically coupled to the pad 200 for wireless charging. Accordingly, the charging receiver module 110, which induces induced electromotive force, generates a charging state information by periodically monitoring the state of charge of the battery BAT, and records the generated state of charge information on the RFID tag 130. , Charging protection circuit module for controlling whether the battery BAT is charged or discharged by supplying or blocking power induced in the charging receiver module 110 to the battery BAT according to on / off control of the RFID tag 130. 120, the wireless identification information of the battery BAT is coupled to the protection circuit module 120 for charging and charging state information is periodically recorded, and the wireless charging pad 200 is provided through the tag antenna TA. from When the F carrier signal is transmitted, the RFID tag which generates and modulates the RF data including the wireless identification information and the charging state information of the battery BAT and transmits the modulated RF data to the wireless charging pad 200 in response thereto ( 130, the battery BAT charged according to the control of the protection circuit 124.

The charging protection circuit module 120 includes rectifier circuits 121 and 121 'and rectifier circuits 121 and 121' for rectifying the electric power induced by the charging receiver module 110 and supplying them to the charging control circuit 122. And a charge control circuit 122 and a charge control circuit 122 for supplying electric power rectified in the rectifier circuits 121 and 121 'to the fuel gauge 123 according to the on-off control of the RFID tag 130. Fuel gauge 123 that supplies the supplied power to the battery BAT through the protection circuit 124, monitors the charging state of the battery BAT, generates charging state information, and periodically records the RFID tag 130. ) Is coupled to the fuel gauge 123 and the battery BAT, and may be configured as a protection circuit 124 that protects the battery BAT by controlling whether the battery is charged or discharged according to the state of charge of the battery BAT.

When the RFID tag 130 transmits the RF carrier signal from the wireless charging pad 200 through the tag antenna TA, the RFID tag 130 receives the wireless identification information of the battery BAT stored in advance and the fuel gauge 123. The RF data is generated and modulated including periodically recorded charging state information to transmit the modulated RF data to the wireless charging pad 200. Here, the RFID tag 130 is composed of a memory block and a logic block. The memory block may be implemented as a ROM 134 in which radio identification information and charge state information of the battery BAT are recorded. As the ROM 134, it is preferable to use an electrically erasable programmable read-only memory (EEPROM) capable of electrically erasing and writing. The logic block checks the order of the data extracted from the clock extractor 131 and the clock extractor 131, which extracts a clock from the RF carrier signal wirelessly received from the wireless charging pad 200. When the control signal is transmitted from the sequencer 132 and the sequencer 132 that transmits the control signal to the wireless network, the radio module receives the wireless identification information and the charging state information of the battery BAT from the tag 135 and encrypts the data to the data modulator 136. Data modulator 133 and ROM 134 for modulating the data received from the data encoder 133 and the data encoder 133 to generate modulated RF data, and then wirelessly transmitting the data to the wireless charging pad 200. The tag 135 may read the wireless identification information and the charging state information of the stored battery BAT and transmit the read data to the data encoder 133.

6B is a flowchart of a battery charging method performed through the wireless charging pad of FIG. 6A. Looking at the charging process using the wireless charging pad 200 according to the present invention with reference to Figure 6b as follows.

Step S100) First, when the secondary battery pack 100 is placed on the primary wireless charging pad 200, an RF carrier signal is generated on the primary wireless charging pad 200 to lift an object. Do a search.

In step S110), as a result, when the charging receiver module 110 does not contain information indicating that the battery pack 100 is built-in, the primary wireless charging pad 200 always enters a power saving mode.

In step S120), as a result of the search, when the battery pack 100 includes the information of the battery pack 100 in which the charging receiver module 110 is embedded, the wireless charging pad 200 wakes up to recognize the wireless identification information and control the charging. To start.

Step S130) displays the wireless identification information for the battery pack 100 of the various portable devices, respectively, and receives the charging state information to indicate whether the state of charge or fullness, respectively. The fully charged state is displayed by lighting a green LED, and the battery pack 100 being charged is displayed by lighting a red LED.

Step S140) When all the battery packs 100 are fully charged, the wireless charging pad 200 collects wireless identification information and enters standby mode again.

7A and 7B illustrate equivalent circuits of a series resonant converter and a parallel resonant converter provided in the pad for wireless charging according to the present invention, respectively.

7A and 7B show an equivalent circuit of a separate transformer having a gap between the wireless charging pad 200 and the battery pack 100. In a contactless charging method for transmitting energy using a magnetic coupling of a transformer, the transformer primary side is inside the wireless charging pad 200 that operates as a contactless charger, and the secondary side is inside the battery pack 100. Because of the spacing between them, the coupling coefficient and magnetization inductance are small, and the leakage inductance is large, causing inefficiency of energy transfer. In addition, there is a problem that it is difficult to transfer the output information to the controller of the primary side in the feedback control. In the present invention, a half-bridge series resonant converter is applied to the transformer primary side in order to overcome the disadvantages of the separate transformer and to efficiently transfer energy. The series resonant converter applied to the transformer primary side reduces the effect of leakage inductance on the separate transformer primary side, enabling efficient energy transfer.

,

)는 2차측 모듈을 오픈(open)시킨 후 1차측 인덕턴스를 측정하는 방식으로 측정하고, 누설인덕턴스(

,

)는 2차측 모듈을 단락(short)시킨 후 1차측 인덕턴스를 측정하는 방식으로 측정한다. 상호인덕턴스 (

)는 1차측과 2차측을 병렬연결하여 임피던스(

)를 측정하고, 1차측과 2차측을 직렬연결하여 임피던스(

)를 측정하여 수학식 1에 대입하여 계산한다.Magnetic inductance

,

) Is measured by measuring the primary inductance after opening the secondary module, and leakage inductance (

,

) Is measured by shorting the secondary module and measuring the primary inductance. Mutual Inductance (

) Connects the primary and secondary side in parallel

) And connect the primary and secondary in series to

) And calculate by substituting Equation 1.

)는 수학식 2a 내지 2c에 의하여 측정한다.Magnetization inductance (

) Is measured by the equations (2a) to (2c).

,

,

: 1차측 권선수,

: 2차측 권선수)(

= Primary winding number,

: Number of secondary windings)

,

,

과

의 전압분배에 의하여 트랜스포머 1차측에 인가되며, 이것은 권선비에 의해 2차측으로 전달된다. 2차측 전압은 다시

와 2차측 부하의 전압분배에 의해 실제 트랜스포머의 2차측에 전달되므로 이상적인 변압기에 비하여 전압이득이 낮아진다. The voltage across the primary side of the transformer

and

It is applied to the transformer primary side by the voltage distribution of, which is transmitted to the secondary side by the turns ratio. The secondary voltage again

The voltage gain is lowered compared to the ideal transformer because it is delivered to the secondary side of the actual transformer by the voltage distribution of the secondary load.

)가 작아지므로 트랜스포머 1차측으로 흘러들어간 전류는

을 거쳐 2차측으로 전달되지 않고, 대부분 임피던스가 낮은 자화인덕턴스(

)를 통하여 다시 1차측으로 순환되어 흐른다. 즉, 부하가 요구하는 전류를 공급하기 위해서는 입력전류가 커져야 한다. 1차측의 전류가 커지면 스위치 등의 도통손실이 증가하여 결과적으로 시스템의 효율을 떨어 뜨리는 원인이 된다. 그러므로 1차측 전류를 줄여 시스템의 효율을 높이기 위해서는 트랜스포머의 결합계수를 높여야 한다. 무접점 충전기는 트랜스포머 1차측과 2차측의 코어가 공극에 의해 분리되어 있고, 권선영역도 나뉘어져 있다. 또한, 자속이 지나가는 길에 공극이 위치하므로 자기저항이 증가하여 코어 내부의 자속밀도가 낮다. Also, if the coupling coefficient is low, the magnetizing inductance of the transformer (

) Becomes small, so the current flowing into the transformer primary side

Magnetization inductance (low impedance)

It is circulated back to the primary side through). In other words, the input current must be large to supply the current required by the load. Larger currents on the primary side increase the conduction losses of the switches and so on, which in turn lowers the efficiency of the system. Therefore, to reduce the primary current and increase the efficiency of the system, the coupling coefficient of the transformer must be increased. In the contactless charger, the cores of the transformer primary side and secondary side are separated by air gaps, and the winding area is also divided. In addition, since the air gap is located on the way the magnetic flux passes, the magnetic resistance is increased to lower the magnetic flux density inside the core.

The magnetic flux density is expressed by Equation 3 when there is a large gap between the primary and secondary cores.

: 자속밀도,

: 권선수,

: 트랜스포머에 흐르는 전류,

: 코어의 자속경로의 길이,

: 공극에서의 자속경로의 길이,

: 코어의 투자율,

: 공극의 투자율)(

: Magnetic flux density,

= Number of turns,

Is the current through the transformer,

= Length of the magnetic flux path of the core,

Is the length of the flux path in the void,

Is the permeability of the core,

: Permeability of voids)

The magnetic flux density in the absence of voids is shown in Equation 4.

Since the permeability of the core is much larger than the permeability of air and the size of the pores is relatively large compared to the size of the core, the magnetic flux density in the absence of voids has a very large value compared to the magnetic flux density in the case of large voids. As a result, transformers with large voids are less likely to saturate within the core and local saturation is less likely. Therefore, narrow cross sections or protrusions are allowed in the form of the core. In addition, since the magnetic flux density inside the core is low, the core loss due to hysteresis is also small.

Due to the large voids, the magnetoresistance increases, and as a result, the inductance of the core decreases. Therefore, in order to make the required magnetizing inductance, the number of turns increases and consequently a wide winding area is required.

은 수학식 5와 같이 나타낼 수 있다.Magnetization inductance

May be represented as in Equation 5.

: 자기저항,

: 1차측 권선수,

: 2차측 권선수,

: 상호 인덕턴스)(

: Magnetoresistance,

= Primary winding number,

= Number of secondary windings,

: Mutual inductance)

이 크기 때문에 요구하는 자화인덕턴스

을 만들기 위해서는 권선수가 증가하게 된다. 일반적으로, 무접점 충전기의 1차측 전압과 2차측의 전압차이가 크고, 이에 따라, 권선비의 차이도 크다. 결과적으로, 1차측과 2차측의 권선영역이 다르고 권선비의 차이가 크기 때문에, 일반적으로 1차측 코어와 2차측 코어의 모양은 비대칭형이 된다. That is, magnetoresistance

Magnetization inductance required because of this size

The winding number is increased to make. In general, the voltage difference between the primary side voltage and the secondary side of the contactless charger is large, and accordingly, the difference in turns ratio is also large. As a result, since the winding areas on the primary side and the secondary side are different and the difference in the turns ratio is large, the shapes of the primary and secondary cores are generally asymmetric.

Most leakage fluxes occur in the air gap between the primary and secondary cores, so the cross section of the cores must be large in order to increase the coupling coefficient in the transformer with voids. However, in the case of a transformer used in a contactless charger, since the secondary core is located inside the battery pack, there is a limitation in volume and weight, so that the width of the cross section facing each other is also limited. However, in the present invention, a flat pad core having a large cross sectional area facing at a limited volume and weight is used.

8A to 8F are diagrams illustrating operations of respective modes of a half-bridge series resonant converter provided in the pad for wireless charging according to the present invention.

8A to 8F show the operation of each mode of the half-bridge series resonant converter (upper converter).

이 켜져 있으며 전류

이 스위치

을 통해 트랜스포머로 흐른다. 도 8b에서 스위치

을 오프하면, 전류

은 스위치

병렬 커패시터를 방전시키는 동시에 스위치

의 병렬 커패시터를 충전시키며 흐른다. 도 8c에서 스위치

의 전압이 영이 되면(스위치

의 전압이 입력전압이 되면) 전류

이 스위치

의 병렬 다이오드를 통해 흐르고,

의 전압은 영 상태를 유지한다. 또한, 전류

이 음으로 방향을 바꾸기 전에 스위치

를 켜면, 스위치

는 영전압 스위칭(ZVS)이 실현된다. 도 8d에서 전류

이 방향을 바꾸어 음이 되면 전류

은 스위치

를 통해서 흐른다. 도 7e에서 스위치

를 오프시키면, 전 류

은 스위치

병렬 커패시터를 방전시키는 동시에 스위치

의 병렬 커패시터를 충전시키며 흐른다. 도 8f에서 스위치

전압이 영이 되면(스위치

전압이 입력전압이 되면) 전류

이 스위치

의 병렬 다이오드를 통해 흐르고, 스위치

의 전압은 영 상태를 유지한다. 또한, 전류

이 양으로 방향을 바꾸기 전에 스위치

을 켜면, 스위치

은 영전압 스위칭(ZVS)이 실현된다.In FIG. 8A

Is on and current

This switch

Flows through the transformer. Switch in Figure 8b

Off, current

Silver switch

Switch to discharge parallel capacitors at the same time

Charges parallel capacitors of Switch in Figure 8c

When the voltage of becomes zero (switch

When the voltage of becomes the input voltage) current

This switch

Through parallel diodes of

The voltage at is kept at zero. In addition, the current

Switch before changing direction to this note

Turn on, switch

Zero voltage switching (ZVS) is realized. Current in Figure 8d

Reverse this direction and when it becomes negative

Silver switch

Flows through. Switch in Figure 7e

When off, current

Silver switch

Switch to discharge parallel capacitors at the same time

Charges parallel capacitors of Switch in Figure 8f

When the voltage reaches zero (switch

When voltage becomes input voltage)

This switch

Through the parallel diode of the switch

The voltage at is kept at zero. In addition, the current

Switch before changing direction to this amount

Turn on, switch

Zero voltage switching (ZVS) is realized.

의 영전압 스위칭이 실현되기 위해서는, 도 8a에서 도 8b로 바뀔 때의 전류

의 크기가, 이 전류에 의한 자기회로의 에너지가 스위치의 병렬 커패시터를 충·방전시키기에 충분하도록 커야 하며, 전류

이 방향을 바꾸기 전에 스위치

의 게이트 신호를 주어야 한다. 스위치

의 경우도 같은 원리로 영전압 스위칭(ZVS)을 구현할 수 있다. switch

In order to realize zero voltage switching of the current, the current at the time of switching from FIG. 8A to FIG. 8B

Must be large enough that the energy of the magnetic circuit caused by this current is sufficient to charge and discharge the parallel capacitor of the switch.

Switch before changing this direction

Should give a gate signal. switch

The same principle can be used to implement zero voltage switching (ZVS).

Here, the resonant frequency greatly affects the efficiency. Since the switching frequency operates near the resonance frequency, the lower the resonance frequency, the lower the core loss and the gap loss of the transformer. However, there are also aspects in which the loss increases because the magnetization current and the transformer primary side current increase. Therefore, it is designed to reduce switching loss by zero voltage switching by selecting switching frequency larger than resonance frequency.

FIG. 9 is a diagram illustrating voltage and current waveforms of a transformer according to a gate signal of a half-bridge series resonant converter provided in a pad for wireless charging according to the present invention.

,

의 게이트 신호에 의해 입력전압과 같은 구형파 전압이 트랜스포머에 인가되고 공진회로를 통해 전류

과 같은 정현파 전류가 트랜스포머로 흐른다. 9, the switch

,

The square wave voltage equal to the input voltage is applied to the transformer by the gate signal of

Sinusoidal current, such as, flows into the transformer.

10 is a diagram illustrating a rotation direction of a magnetic field according to operation of each mode of a half-bridge series resonant converter provided in a pad for wireless charging according to the present invention.

10 shows the rotation direction of the magnetic field generated by the operation of each mode of the half-bridge series resonant converter. Therefore, since the magnetic field rotates 360 degrees, when the battery pack 100 in which the charging receiver module 110 is mounted is placed on the wireless charging pad 200, the induced electromotive force can be transmitted to the secondary side regardless of the position and direction of the battery pack 100. do.

11A to 11D illustrate a rectifier circuit of a charging receiver module according to the present invention.

Referring to FIGS. 11A through 11D, the secondary receiver receiver module 110 uses a single center-tap rectifier diode output and an output filter capacitor through a series-parallel resonance center-tap half-bridge rectifier circuit. Power is delivered through a rectifier circuit implemented as a full-bridge rectifier diode output and a series-parallel resonance full-bridge rectifier circuit using an output filter capacitor.

12 is a block diagram of a controller provided in the pad for wireless charging according to the present invention.

The controller 240 provided in the wireless charging pad 200 according to the present invention determines whether the battery pack 100 is mounted, and if the battery pack 100 is loaded, the RFID tag (from the battery pack 100) Read the wireless identification information stored in 130 to determine whether to charge or how many battery packs (100) are placed to create a drive control signal, and at the same time displays the charge status of the individual battery pack.

Referring to FIG. 12, the controller 240 included in the wireless charging pad 200 according to the present invention includes an oscillator 241, an antenna driver 242, and an antenna driver 242 that generate an oscillation signal having a predetermined frequency. A demodulator 243 for demodulating the received RF data, and a filter and amplifying unit 244 for filtering and amplifying the radio identification information and the charging state information from the demodulated data. A data decoder 245 for decoding the radio identification information and the charging state information received from the filter and the amplifying unit 244, a driver control unit 246 for performing mode switching according to the charging state by the decoded data, and a data decoder. The display unit 247, the timer 248, the reset unit 249, and the like, which display the data decoded at 245, may be configured.

The antenna driver 242 clocks the oscillation signal of the oscillator 241, monitors the approach of the battery pack 100, and accesses the RF through the reader antenna RA as the battery pack 100 approaches. In response to the carrier signal, wirelessly receives the modulated RF data including the radio identification information and the charging state information of the battery pack 100. In this case, the antenna driver 242 monitors the approach of the battery pack 100 and periodically checks whether there is a signal returned after wirelessly transmitting the RF carrier signal to the outside through the reader antenna RA. A polling scheme can be applied.

In addition, when the plurality of battery packs 100 are placed, the controller 240 reads the wireless identification information and the charging state information of each battery pack 100 in the order of being displayed, and displays the state of charge for each, and all of them. When the battery pack 100 is fully charged and becomes a full state, the battery pack 100 implements a function of switching to a power saving mode.

FIG. 13 is a view illustrating an RF singnal flow between a wireless charging pad and a battery pack according to the present invention.

Referring to FIG. 12, the controller 240 includes an HF (3-30 MHz, high frequency, short wave) or UHF (300-3000 MHz) in the RFID tag 130 in the battery pack 100 in which the charging receiver module 110 is installed. When accessing the information about the battery at a carrier frequency of the ultra high frequency (ultra high frequency) band, the battery information stored in the memory block of the RFID tag 130 is modulated with an RF signal (RF signal) for wireless charging pad ( 200).

The present invention can be variously modified within the scope without departing from the basic concept according to the needs of those skilled in the art.

As described above, according to the present invention, a means for recognizing a state of charge of a battery pack in real time and immediately detecting a device mounted therein is implemented, whereby a plurality of battery packs are placed on a wireless charging pad or There is an effect of providing a wireless charging pad and battery pack is applied to the radio frequency identification technology that enables efficient response, such as when the foreign matter is impossible to charge.

Claims (14)

In the wireless charging pad 200 for contactless charging the battery pack 100 mounted on a portable device, When the battery pack 100 is detected while waiting in a power saving mode, it switches to an operation mode to control drive circuits 220 and 220 ', and an RF carrier signal to the battery pack 100 in the operation mode. ) And, in response, receives modulated RF data including radio identification information and charge state information of the battery pack 100 through a reader antenna RA to receive the battery pack 100. A controller 240 which displays a charging state of the battery pack and switches to a power saving mode again when the battery pack 100 is finished charging; The drive circuits 220 and 220 ′ respectively switching two primary side coils Pcoil1 and Pcoil2 under the control of the controller 240; And the drive circuits 220 and 220 'are respectively switched to generate an induction electromotive force to charge the battery pack 100, and to form a small flat plate core made of cobalt-based amorphous metal or ferrite into a square or rectangular shape. Pads for wireless charging, characterized in that it comprises a; pad cores and a plurality of primary transformers formed by winding two primary coils (Pcoil1, Pcoil2) on the pad core in a 90-degree direction on the pad core . The method of claim 1, The controller 240, When the plurality of battery packs 100 are loaded, the wireless identification information and the charging state information are read in order of being displayed to display the charging status for each battery pack 100, and all the battery packs 100 are charged. The wireless charging pad to which the radio frequency identification technology is applied is characterized in that when it is completed and fully charged, it goes into a power saving mode. The method according to claim 1 or 2, The controller 240, An oscillator 241 for generating an oscillation signal of a predetermined frequency; The oscillation signal of the oscillator 241 is a clock, and after the wireless transmission of the RF carrier signal to the outside through a reader antenna RA, the presence of a return signal is checked to check whether the battery pack 100 The reader antenna (RA) monitors the access and modulates the RF data including the radio identification information and the charging state information of the battery pack 100 in response to the RF carrier signal as the battery pack 100 approaches. Antenna driver 242 for wireless reception; A demodulator (243) for demodulating RF data received by the antenna driver (242); A filter and amplifying unit 244 for filtering and amplifying the radio identification information and the charging state information from the data demodulated by the demodulator 243; A data decoder 245 for decoding the radio identification information and the charging state information received from the filter and amplification unit 244; And a display unit (247) for displaying the data decoded by the data decoder (245). The method of claim 1, The drive circuit 220, 220 ', It consists of two half-wave series-parallel resonant converters to control the orthogonal primary coils (Pcoil1, Pcoil2), respectively, but the frequency higher than the resonance point so that the switching pattern of each primary coil (Pcoil1, Pcoil2) is 90 degrees out of phase. The magnetic flux that has been switched to and then changed is rotated 360 degrees in a direction of 180 degrees → 135 degrees → 90 degrees → 45 degrees → 0 degrees → −45 degrees → −90 degrees → −135 degrees Wireless charging pad applied to the radio frequency identification technology, characterized in that to generate a rotating magnetic field. The method of claim 1, An electromagnetic wave filter 250 coupled to a power input terminal to block electromagnetic waves of an input AC power; An AC / DC conversion circuit 210 for receiving AC power from which electromagnetic waves are blocked by the electromagnetic filter 250 and rectifying the DC power; Coupled to the AC / DC conversion circuit 210 and the controller 240, the power is accumulated while the built-in transistor is on and transfers the accumulated power to the controller 240 at the moment when it is turned off to the controller 240. And a flyback converter (210 ') for driving 220, 220'). The method of claim 1, The wireless charging pad 200 is a wireless charging pad to which the radio frequency identification technology is applied, characterized in that it has an input port that can be coupled to at least one of the AC adapter, USB port, car cigar jack. In a battery pack (B) mounted on a portable device and contactlessly charged by a wireless charging pad (A), It consists of a plate core made of amorphous metal and two secondary coils (Scoil1, Scoil2) wound in the vertical and horizontal directions, respectively, and the magnetic charge is induced by the magnetic coupling with the wireless charging pad 200 Receiver module 110; Combined with the charging receiver module 110 and the battery BAT, the charging state information generated by periodically monitoring the charging state of the battery BAT is recorded in the RFID tag 130, the RFID tag 130 Charging protection circuit module 120 that controls whether the battery BAT is charged or discharged by supplying or blocking power induced in the charging receiver module 110 to the battery BAT according to on / off control of ; Coupled to the charging protection circuit module 120, the wireless identification information of the battery BAT is stored and the charging state information is periodically recorded from the wireless charging pad 200 through the tag antenna TA. When the RFID carrier signal is transmitted, the RFID to generate and modulate the RF data including the radio identification information and the charging state information of the battery BAT and transmit the modulated RF data to the wireless charging pad 200 in response thereto. Tag 130; The battery pack to which the radio frequency identification technology is applied, comprising: a battery (BAT) charged according to the control of the protection circuit (124). The method of claim 7, wherein An amorphous metal series that magnetically blocks the battery BAT and the charging receiver module 110 to minimize the temperature rise of the battery BAT due to frequency interference and induction heating caused by radio signals or induced electromotive force in a magnetic field. The electromagnetic wave protector 140 of the battery pack to which the radio frequency identification technology is applied. The method according to claim 7 or 8, The induction electromotive force is made of a cool polymer material to perform the exothermic action of dissipating heat generated inside by charging, while passing through the induction electromotive force, so that the above-described components are mutually bonded to surround the entire structure of the assembled structure. A battery pack to which the radio frequency identification technology is applied, characterized in that the battery case 150 is further provided. The method of claim 7, wherein The charging protection circuit module 120, Rectification circuits 121 and 121 'for rectifying the power induced by the charging receiver module 110 and supplying the charge control circuit 122; Charge control coupled to the rectifier circuits 121 and 121 'and supplying the rectified power from the rectifier circuits 121 and 121' to the fuel gauge 123 according to the on-off control of the RFID tag 130. Circuit 122; The power supplied from the charge control circuit 122 is supplied to the battery BAT through the protection circuit 124, the state of charge of the battery BAT is monitored to generate charge state information to generate the RFID tag ( A fuel gauge 123 periodically writing to 130; And a protection circuit 124 coupled to the fuel gauge 123 and the battery BAT to control whether the battery is charged or discharged according to the state of charge of the battery BAT to protect the battery BAT. Battery pack to which the radio frequency identification technology is applied. The method of claim 10, The rectifier circuit (121, 121 '), Center- and parallel-resonant center-tap half-bridge rectifier circuits with one center-tap rectifier diode output and output filter capacitors or direct- and parallel-resonant full-bridge rectifier circuits with full-bridge rectified diode outputs and output filter capacitors. Battery pack to which the radio frequency identification technology is applied. The method of claim 7, wherein The RFID tag 130 is, A clock extracting unit (131) for extracting a clock from the RF carrier signal wirelessly received from the wireless charging pad (200); A sequencer 132 which checks the order of the data extracted from the clock extractor 131 and transmits a control signal to the data encoder 133; A data encoder 133 which receives and encrypts radio identification information and charge state information of the battery BAT from a tag 135 when the control signal is transmitted from the sequencer 132 and transmits the encrypted data to the data modulator 136; A data modulator 136 for modulating the data received from the data encoder 133 to generate modulated RF data and wirelessly transmitting the modulated RF data to the wireless charging pad 200; A ROM 134 for recording wireless identification information and charge state information of the battery BAT; And a tag 135 that reads the radio identification information and the charging state information of the battery BAT stored in the ROM 134 and transmits them to the data encoder 133. Battery pack with frequency identification technology. The method according to claim 1 or 7, The radio identification information, The RFID tag through communication between a product name of the battery BAT, a serial number of the battery BAT, a body of a portable device in which the battery pack 100 is mounted, and the battery pack 100. Wireless charging pad to which the radio frequency identification technology is applied, characterized in that at least one of the user identification number stored in the 130). The method according to claim 1 or 7, The RF carrier signal, A signal that accesses a radio frequency (RFID) signal stored in the battery pack 100 at a carrier frequency of the HF (3-30 MHz, high frequency, shortwave) or UHF (300-3000 MHz, ultra high frequency, ultrahigh frequency) band Wireless charging pad to which radio frequency identification technology is applied.

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