WO2018221917A1 - Procédé de régulation de transmission d'énergie sans fil d'un émetteur d'énergie sans fil - Google Patents

Procédé de régulation de transmission d'énergie sans fil d'un émetteur d'énergie sans fil Download PDF

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Publication number
WO2018221917A1
WO2018221917A1 PCT/KR2018/006055 KR2018006055W WO2018221917A1 WO 2018221917 A1 WO2018221917 A1 WO 2018221917A1 KR 2018006055 W KR2018006055 W KR 2018006055W WO 2018221917 A1 WO2018221917 A1 WO 2018221917A1
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WO
WIPO (PCT)
Prior art keywords
wireless power
transmitter
power receiver
receiver
range communication
Prior art date
Application number
PCT/KR2018/006055
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English (en)
Korean (ko)
Inventor
채용석
Original Assignee
엘지이노텍 주식회사
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Publication of WO2018221917A1 publication Critical patent/WO2018221917A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive loop type
    • H04B5/79—

Definitions

  • the present invention relates to a wireless power transmission technology, and more particularly, to a wireless power transmission control method of a wireless power transmitter for performing wireless charging and short-range wireless communication.
  • Portable terminals such as mobile phones and laptops include a battery that stores power and circuits for charging and discharging the battery. In order for the battery of the terminal to be charged, power must be supplied from an external charger.
  • the terminal is supplied with commercial power and converted into a voltage and a current corresponding to the battery to supply electrical energy to the battery through the terminal of the battery.
  • Supply method This terminal supply method is accompanied by the use of a physical cable (cable) or wire. Therefore, when handling a lot of terminal supply equipment, many cables occupy considerable working space, are difficult to organize, and are not good in appearance.
  • the terminal supply method may cause problems such as instantaneous discharge phenomenon due to different potential difference between the terminals, burnout and fire caused by foreign substances, natural discharge, deterioration of battery life and performance.
  • a charging system (hereinafter referred to as a "wireless charging system") and a control method using a method of transmitting power wirelessly have been proposed.
  • the wireless charging system was not pre-installed in some portable terminals in the past and the consumer had to separately purchase a wireless charging receiver accessory, the demand for the wireless charging system was low, but the number of wireless charging users is expected to increase rapidly. It is expected to be equipped with wireless charging function.
  • the wireless charging system includes a wireless power transmitter for supplying electrical energy through a wireless power transmission method and a wireless power receiver for charging the battery by receiving the electrical energy supplied from the wireless power transmitter.
  • the wireless charging system may transmit power by at least one wireless power transmission method (eg, electromagnetic induction method, electromagnetic resonance method, RF wireless power transmission method, etc.).
  • wireless power transmission method eg, electromagnetic induction method, electromagnetic resonance method, RF wireless power transmission method, etc.
  • the wireless power transmission scheme may use various wireless power transmission standards based on an electromagnetic induction scheme that generates a magnetic field in the power transmitter coil and charges using an electromagnetic induction principle in which electricity is induced in the receiver coil under the influence of the magnetic field.
  • the electromagnetic induction wireless power transmission standard may include an electromagnetic induction wireless charging technology defined by the Wireless Power Consortium (WPC) and Air Fuel Alliance (formerly PMA, Power Matters Alliance).
  • the wireless power transmission method may use an electromagnetic resonance method of transmitting power to a wireless power receiver located in close proximity by tuning a magnetic field generated by a transmission coil of the wireless power transmitter to a specific resonance frequency.
  • the electromagnetic resonance method may include a wireless charging technology of the resonance method defined in the Air Fuel Alliance (formerly A4WP, Alliance for Wireless Power) standard mechanism which is a wireless charging technology standard mechanism.
  • the wireless power transmission method may use an RF wireless power transmission method that transmits power to a wireless power receiver located at a far distance by putting low power energy on an RF signal.
  • a short distance communication function may be mounted, and an application for user convenience may be performed on various devices equipped with a short distance communication function.
  • the authentication step in order to perform such a short-range communication function, the authentication step must be performed in advance, and when the authentication step is performed, an application must be executed by a separate arbitrary operation by the user.
  • the user when the user does not perform a separate operation, it is difficult to expect normal operation because the wireless power receiver and the short-range communication module do not communicate.
  • the present embodiment is devised to solve the above-described problems of the related art, and an object of the present embodiment is to provide a method for controlling a wireless power transmitter and a wireless power receiver.
  • Another object of the present embodiment is to provide a method for controlling a wireless power transmitter and a wireless power receiver capable of performing near field communication.
  • another object of the present embodiment is to provide a method for controlling a wireless power transmitter and a wireless power receiver capable of providing power for performing an authentication operation in near field communication.
  • Another object of the present embodiment is to provide a wireless power transmitter and a method of controlling the wireless power receiver for controlling the wireless power receiver with minimal power.
  • Another object of the present embodiment is to provide a wireless power transmitter and a method of controlling the wireless power receiver, which can perform an authentication operation for performing short-range communication with the wireless power receiver using a wireless power transmitter without user manipulation. .
  • Another object of the present embodiment is to provide a control method of a wireless power transmitter and a wireless power receiver to facilitate short-range communication between a wireless power transmitter and a wireless power receiver based on pre-registered information.
  • the wireless power transmission control method of the wireless power transmitter the step of sensing a wireless power receiver; Detecting a near field communication integrated circuit of the wireless power receiver; Switching the wireless power receiver to a near field communication active mode; And transmitting charging power to the wireless power receiver.
  • the wireless power transmission control method of the wireless power transmitter comprising: transmitting charging power to the wireless power receiver; Receiving a short range communication support operation request signal; Terminating charging power transmission to the wireless power receiver; And switching the wireless power receiver to a near field communication active mode.
  • the present embodiment can provide a wireless power transmitter and a method of controlling the wireless power receiver using the same.
  • the wireless power transmitter may control the operation of the wireless power receiver.
  • the wireless power transmitter may perform near field communication with the wireless power receiver.
  • the short range communication authentication may be performed by the wireless power transmitter without the user manipulation of the wireless power receiver.
  • the present embodiment can quickly execute the authentication and the application when executing the near field communication based on the authentication result for the near field communication.
  • FIG. 1 is a block diagram illustrating a wireless charging system according to an embodiment.
  • FIG. 2 is a state transition diagram for explaining a first wireless power transmission procedure defined in the WPC standard.
  • FIG. 3 is a state transition diagram for explaining a second wireless power transmission procedure defined in the WPC standard.
  • FIG. 4 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
  • FIG. 5 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to FIG. 4.
  • FIG. 6 is a top view illustrating the structure of a transmission coil and a short range communication antenna of a wireless power transmitter according to the present embodiment.
  • FIG. 7 is a flowchart illustrating an operation for performing short-range communication between a wireless power transmitter and a wireless power receiver according to an embodiment.
  • FIG. 8 is a flowchart illustrating an operation of performing a short range communication between a wireless power transmitter and a wireless power receiver according to another embodiment.
  • FIG. 9 is a flowchart illustrating a short-range communication operation according to the present embodiment.
  • FIG. 10 is a flowchart illustrating a data storage operation during a short-range communication authentication operation according to the present embodiment.
  • 11 is a flowchart illustrating an operation of performing a near field communication with a wireless power receiver by a wireless power transmitter according to another embodiment.
  • FIG. 12 is a flowchart illustrating an operation of performing a near field communication with a wireless power receiver by a wireless power transmitter according to another embodiment.
  • the present invention is not necessarily limited to these embodiments, although all of the components constituting the embodiments are described as being combined or operating in combination. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, although all of the components may be implemented in one independent hardware, each or all of the components may be selectively combined to perform some or all functions combined in one or a plurality of hardware. It may be implemented as a computer program having a. Codes and code segments constituting the computer program may be easily inferred by those skilled in the art. Such a computer program may be stored in a computer readable storage medium and read and executed by a computer, thereby implementing the embodiments.
  • the storage medium of the computer program may include a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like.
  • the apparatus for transmitting wireless power on the wireless power charging system is a wireless power transmitter, wireless power transmitter, wireless power transmitter, wireless power transmitter, transmitter, transmitter, transmitter, transmitting side for convenience of description.
  • a wireless power transmitter, a wireless power transmitter, and a wireless charging device will be used in combination.
  • a wireless power receiver, a wireless power receiver, a wireless power receiver, a wireless power receiver, a wireless power receiver, a receiver terminal, a receiver, a receiver, a receiver Terminals and the like may be used interchangeably.
  • Wireless charging apparatus may be configured in the form of a pad, a cradle, an access point (AP), a small base station, a stand, a ceiling buried, a wall, etc., one transmitter receives a plurality of wireless power It may also transmit power to the device.
  • AP access point
  • AP small base station
  • stand a stand
  • ceiling buried
  • wall etc.
  • the wireless power transmitter may not only be used on a desk or a table, but also may be developed and applied to an automobile and used in a vehicle.
  • the wireless power transmitter installed in the vehicle may be provided in the form of a cradle that can be fixed and mounted simply and stably.
  • Terminal is a mobile phone (smart phone), smart phone (smart phone), laptop computer (laptop computer), digital broadcasting terminal, PDA (Personal Digital Assistants), PMP (Portable Multimedia Player), navigation, MP3 player, electric It may be used in a small electronic device such as a toothbrush, electronic tag, lighting device, remote control, fishing bobber, etc., but is not limited thereto, and is a mobile device device equipped with a wireless power receiving means according to an embodiment to charge a battery (hereinafter referred to as "device” "Terminal.” Is sufficient, and the term “terminal” or “device” may be used interchangeably.
  • the wireless power receiver according to another embodiment may be mounted in a vehicle, an unmanned aerial vehicle, an air drone, or the like.
  • the wireless power receiver may be provided with at least one wireless power transmission scheme, and may simultaneously receive wireless power from two or more wireless power transmitters.
  • the wireless power transmission method may include at least one of the electromagnetic induction method, electromagnetic resonance method, RF wireless power transmission method.
  • the wireless power receiving means supporting the electromagnetic induction method may include electromagnetic induction wireless charging technology defined by the Wireless Power Consortium (WPC) and Air Fuel Alliance (formerly PMA, Power Matters Alliance). Can be.
  • the wireless power receiving means supporting the electromagnetic resonance method may include a wireless charging technology of the resonance method defined in the Air Fuel Alliance (formerly A4WP, Alliance for Wireless Power) standard mechanism, which is a wireless charging technology standard mechanism.
  • the wireless power transmitter and the wireless power receiver constituting the wireless power system may exchange control signals or information through in-band communication or Bluetooth low energy (BLE) communication.
  • in-band communication and BLE communication may be performed by a pulse width modulation method, a frequency modulation method, a phase modulation method, an amplitude modulation method, an amplitude and phase modulation method, or the like.
  • the wireless power receiver may transmit various control signals and information to the wireless power transmitter by generating a feedback signal by switching ON / OFF the current induced through the receiving coil in a predetermined pattern.
  • the information transmitted by the wireless power receiver may include various state information including received power strength information.
  • the wireless power transmitter may calculate the charging efficiency or the power transmission efficiency based on the received power strength information.
  • FIG. 1 is a block diagram illustrating a wireless charging system according to an embodiment.
  • a wireless charging system includes a wireless power transmitter 10 that largely transmits power wirelessly, a wireless power receiver 20 that receives the transmitted power, and an electronic device 30 that receives the received power. Can be configured.
  • the wireless power transmitter 10 and the wireless power receiver 20 may perform in-band communication for exchanging information using the same frequency band as the operating frequency used for wireless power transmission.
  • the wireless power transmitter 10 and the wireless power receiver 20 perform out-of-band communication for exchanging information using a separate frequency band different from an operating frequency used for wireless power transmission. It can also be done.
  • the information exchanged between the wireless power transmitter 10 and the wireless power receiver 20 may include control information as well as status information of each other.
  • the status information and control information exchanged between the transmitting and receiving end will be more clear through the description of the embodiments to be described later.
  • the in-band communication and the out-of-band communication may provide bidirectional communication, but are not limited thereto. In another embodiment, the in-band communication and the out-of-band communication may provide one-way communication or half-duplex communication.
  • the unidirectional communication may be performed by the wireless power receiver 20 only transmitting information to the wireless power transmitter 10, but is not limited thereto.
  • the wireless power transmitter 10 may transmit information to the wireless power receiver 20. It may be to transmit.
  • bidirectional communication between the wireless power receiver 20 and the wireless power transmitter 10 is possible, but at one time, only one device may transmit information.
  • the wireless power receiver 20 may obtain various state information of the electronic device 30.
  • the state information of the electronic device 30 may include current power usage information, information for identifying an application being executed, CPU usage information, battery charge status information, battery output voltage / current information, temperature information, and the like.
  • the present invention is not limited thereto, and may be information obtained from the electronic device 30 and available for wireless power control.
  • FIG. 2 is a state transition diagram for explaining a first wireless power transmission procedure defined in the WPC standard.
  • power transmission from a transmitter to a receiver according to the first wireless power transmission procedure of the WPC standard is largely selected in a selection phase 210, a ping phase 220, and an identification and identification step. and Configuration Phase, 230), and a power transfer phase (240).
  • the selection step 210 may be a step of transitioning when a specific error or a specific event is detected while starting or maintaining power transmission.
  • the transmitter may monitor whether an object exists on the interface surface. If the transmitter detects that an object is placed on the interface surface, the transmitter may transition to the ping step 220 (S201).
  • the transmitter transmits an analog ping signal of a very short pulse, and detects whether an object exists in an active area of the interface surface based on a change in current of a transmitting coil.
  • the transmitter activates the receiver and sends a digital ping to identify whether the receiver is a receiver that is compliant with the WPC standard. If the transmitter does not receive a response signal to the digital ping (eg, signal strength indicator) from the receiver in the ping step 220, it may transition back to the selection step 210 (S202). In addition, in the ping step 220, when the transmitter receives a signal indicating that the power transmission is completed, that is, the charging completion signal, the transmitter may transition to the selection step 210 (S203).
  • the digital ping eg, signal strength indicator
  • the transmitter may transition to the identification and configuration step 230 for collecting receiver identification and receiver configuration and status information (S204).
  • the transmitter receives an unexpected packet, a desired packet has not been received for a predefined time, a packet transmission error, or a power transmission contract. If this is not set (no power transfer contract) it may transition to the selection step 210 (S205).
  • the transmitter may transition to the power transmission step 240 for transmitting the wireless power (S206).
  • the transmitter receives an unexpected packet, an outgoing desired packet for a predefined time, or a violation of a preset power transmission contract. transfer contract violation), if the filling is completed, the transition to the selection step (210) (S207).
  • the transmitter may transition to the identification and configuration step 230 (S208).
  • the power transmission contract may be set based on state and characteristic information of the transmitter and the receiver.
  • the transmitter state information may include information about the maximum amount of power that can be transmitted, information about the maximum number of receivers that can be accommodated, and the receiver state information may include information about required power.
  • FIG. 3 is a state transition diagram for explaining a second wireless power transmission procedure defined in the WPC standard.
  • power transmission from a transmitter to a receiver according to the second wireless power transmission procedure of the WPC standard is largely performed in a selection phase 310, a ping phase 320, and an identification and configuration step.
  • Configuration Phase 330
  • Negotiation Phase 340
  • Calibration Phase 3
  • Power Transfer Phase Power Transfer Phase
  • Renegotiation Phase 370
  • the selection step 310 transitions if a specific error or a specific event is detected while initiating or maintaining the power transmission—for example, including the reference numerals S302, S304, S308, S310, and S312. Can be.
  • the transmitter may monitor whether an object exists on the interface surface. If the transmitter detects that an object is placed on the interface surface, it may transition to ping step 320. In the selection step 310, the transmitter transmits a very short pulse of an analog ping signal, and an object in the active area of the interface surface based on the current change of the transmitting coil or the primary coil. Can detect the presence of
  • the wireless power transmitter may measure a quality factor of a wireless power resonant circuit, eg, a transmission coil and / or a resonant capacitor for wireless power transmission.
  • a wireless power resonant circuit eg, a transmission coil and / or a resonant capacitor for wireless power transmission.
  • the wireless power transmitter can measure the inductance of a wireless power resonant circuit (eg, a power transfer coil and / or resonant capacitor).
  • a wireless power resonant circuit eg, a power transfer coil and / or resonant capacitor.
  • the quality factor and / or inductance may be used to determine the presence or absence of foreign matter in a future negotiation step 340.
  • the transmitter wakes up the receiver and transmits a digital ping for identifying whether the detected object is a wireless power receiver (S301). If in ping step 320 the transmitter does not receive a response signal (eg, a signal strength packet) to the digital ping from the receiver, it may transition back to selection step 310. In addition, in the ping step 320, when the transmitter receives a signal indicating that the power transmission is completed, that is, a charging completion packet, the transmitter may transition to the selection step 310 (S302).
  • a response signal eg, a signal strength packet
  • the transmitter may transition to the identification and configuration step 330 for identifying the receiver and collecting receiver configuration and status information (S303).
  • the sender receives an unexpected packet, a desired packet has not been received for a predefined time, a packet transmission error, or a power transmission contract. If this is not set (no power transfer contract) it may transition to the selection step 310 (S304).
  • the transmitter may determine whether entry into the negotiation step 340 is required based on a negotiation field value of the configuration packet received in the identification and configuration step 330.
  • the transmitter may enter a negotiation step 340 (S305).
  • negotiation step 340 the transmitter may perform a predetermined FOD detection procedure.
  • the transmitter may immediately enter the power transmission step 360 (S306).
  • the transmitter may receive a Foreign Object Detection (FOD) status packet including a reference quality factor value.
  • FOD Foreign Object Detection
  • the FOD status packet including the reference inductance value may be received.
  • a status packet including a reference quality factor value and a reference inductance value may be received.
  • the transmitter may determine the quality factor threshold for FO detection based on the reference quality factor value.
  • the transmitter may determine an inductance threshold for FO detection based on the reference inductance value.
  • the transmitter may detect whether the FO is present in the charging region using the quality factor threshold for the determined FO detection and the currently measured quality factor value, which may be, for example, the quality factor value measured before the ping step.
  • Power transmission may be controlled according to the detection result. For example, when the FO is detected, power transmission may be stopped, but is not limited thereto.
  • the transmitter can detect whether the FO is present in the charging region using the inductance threshold for the determined FO detection and the current measured inductance value, which may be, for example, the inductance value measured prior to the ping step. Accordingly, power transmission can be controlled. For example, when the FO is detected, power transmission may be stopped, but is not limited thereto.
  • the transmitter may return to the selection step 310 (S308).
  • the transmitter may enter the power transmission step 360 through the correction step 350 (S307 and S309).
  • the transmitter determines the strength of the power received at the receiving end in the correction step 350, and determines the power loss at the receiving end and the transmitting end to determine the strength of the power transmitted at the transmitting end. It can be measured. That is, the transmitter may predict the power loss based on the difference between the transmit power of the transmitter and the receive power of the receiver in the correction step 350.
  • the transmitter may correct the threshold for FOD detection by reflecting the predicted power loss.
  • the transmitter receives an unexpected packet, an outgoing desired packet for a predefined time, or a violation of a predetermined power transmission contract occurs. transfer contract violation), if the filling is completed, the transition to the selection step 310 (S310).
  • the transmitter may transition to the renegotiation step 370 (S311). At this time, if the renegotiation is normally completed, the transmitter may return to the power transmission step 360 (S313).
  • the power transmission contract may be set based on state and characteristic information of the transmitter and the receiver.
  • the transmitter state information may include information about the maximum amount of power that can be transmitted, information about the maximum number of receivers that can be accommodated, and the receiver state information may include information about required power.
  • the transmitter may stop the power transmission to the corresponding receiver and transition to the selection step 310 (S312).
  • FIG. 4 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
  • the wireless power transmitter 400 includes a power converter 410, a power transmitter 420, a first communication unit 430, a near filed communication (NFC) antenna 440, and a second It may be configured to include a communication unit 450, a control unit 460, and a storage unit 480.
  • the configuration of the wireless power transmitter 400 is not necessarily essential, and may include more or fewer components.
  • the power converter 410 may perform a function of converting the power into power of a predetermined intensity.
  • the power converter 410 may include a DC / DC converter 411 and an amplifier 412.
  • the DC / DC converter 411 may perform a function of converting DC power supplied from the power supply unit 460 into DC power having a specific intensity according to a control signal of the controller 440.
  • the amplifier 412 may adjust the intensity of the DC / DC converted power according to the control signal of the controller 440.
  • the controller 440 may receive power reception state information or (and) power control signal of the wireless power receiver through the first communication unit 430, and receive the received power reception state information or (and) power control signal.
  • the amplification factor of the amplifier 412 can be dynamically adjusted based on the.
  • the power reception state information may include, but is not limited to, strength information of the rectifier output voltage and strength information of a current applied to the receiving coil.
  • the power control signal may include a signal for requesting power increase, a signal for requesting power reduction, and the like.
  • the power transmitter 420 may include a driver 421 and a transmission coil 422.
  • the driver 421 may include a multiplexer (or multiplexer) (not shown) and a carrier generator (not shown) for generating a specific frequency and a specific duty ratio for power transmission.
  • the carrier generator may generate a specific frequency for converting the output DC power of the amplifier 412 received through the multiplexer into AC power having a specific frequency.
  • the AC signal generated by the carrier generator is mixed with the output terminal of the multiplexer 621 to generate AC power.
  • this is only one embodiment, and the other example is before the amplifier 412. Note that it may be mixed at the stage or after.
  • Frequency of AC power delivered to each transmission coil may be different from each other, and another embodiment each using a predetermined frequency controller with a function to adjust the LC resonance characteristics differently for each transmission coil It is also possible to set the resonant frequency for each transmitting coil equally or differently.
  • the power transmitter 420 may include a multiplexer of the driver 421 and a plurality of transmit coils 422-that is, a second controller for controlling the output power of the amplifier 412 to be transmitted to the transmit coil. 1 to n-th transmit coils.
  • the short range communication unit 440 may perform wireless communication in a short range with a short range communication module installed in the wireless power receiver. At this time, the frequency band for short-range communication can communicate at 13.56KHz.
  • the short range communication unit 440 provides a short range communication function with the wireless power receiver as described above, and the short range communication unit 440 according to the present embodiment may be included in the wireless power transmitter 400 mounted in the vehicle. Therefore, by performing communication with a short-range communication unit configured in the wireless power receiver mounted on the wireless power transmitter 400, the in-vehicle or user application can be executed.
  • the sensing unit 470 may include at least one of a current sensor, a voltage sensor, a temperature sensor, an operating frequency sensor, a receiver detection sensor, and a duty sensor.
  • the sensing unit 480 may measure the current of the DC-converted power by the power converter 410 using the current sensor and provide the current to the controller 440.
  • the sensing unit 480 may measure the voltage of the power DC converted by the power converter 410 using a voltage sensor and provide the voltage to the controller 440.
  • the sensing unit 480 may measure the internal temperature of the wireless power transmitter 400 to determine whether overheating occurs using a temperature sensor, and provide the measurement result to the controller 450.
  • the sensing unit 450 may measure and provide an operating frequency of AC power delivered to the transmitting coil 422 to the control unit 450 using an operating frequency sensor.
  • the sensing unit 480 may measure the duty ratio of the AC power delivered to the transmission coil 422 using the duty ratio sensor and provide it to the controller 450.
  • control unit 450 may adaptively move from the power supply unit 450 based on any one or more of a voltage value, a current value, an internal temperature value, an operating frequency value, and a duty ratio value measured by the sensing unit 450.
  • the power supply of the may be cut off, or the power supply to the amplifier 412 may be cut off.
  • one side of the power converter 410 may be further provided with a predetermined power cut-off circuit for cutting off the power supplied from the power source 450, or cut off the power supplied to the amplifier 412.
  • the controller 440 may control the power transmitter 420 to temporarily transmit power to transmit power for controlling the operation of the wireless power receiver.
  • the controller 450 may control the power transmitter 420 to transmit power for controlling the wireless power receiver through the transmission coil 422.
  • the controller 450 controls to transmit power for activating a screen of the wireless power receiver to perform short range communication authentication.
  • the power transmission may be controlled to terminate when the control error packet is received from the wireless power receiver or the short-range communication authentication step is entered.
  • the controller 450 may transmit power for activating the display unit to the wireless power receiver in an identification and configuration step.
  • the control unit 450 may control to stop the power transmission step when the control error packet is received from the wireless power receiver after the power transmission step enters the power transmission step.
  • controller 450 may control an operation for performing authentication for short-range communication according to an embodiment.
  • the controller 450 may control short-range communication authentication and check whether the short-range communication application is operable from the wireless power receiver when the authentication is completed.
  • the controller 450 may control the overall operation of each component constituting the wireless power transmitter.
  • the modulator 431 may modulate the control signal generated by the controller 450 and transmit the modulated control signal to the driver 421.
  • the modulation scheme for modulating the control signal is a frequency shift keying (FSK) modulation scheme, a Manchester coding modulation scheme, a PSK (Phase Shift Keying) modulation scheme, a pulse width modulation scheme, a differential 2 Differential bi-phase modulation schemes may be included, but is not limited thereto.
  • the demodulator 432 may demodulate the detected signal and transmit the demodulated signal to the controller 450.
  • the demodulated signal includes a received power indicator, a signal strength indicator, an identification indicator, a configuration indicator, an error correction (EC) indicator for power control during wireless power transmission, an end of charge (EOC) indicator, and an overvoltage It may include / over current / overheat indicator, but is not limited thereto, and may include various state information for identifying the state of the wireless power receiver.
  • the demodulator 432 may identify from which transmission coil the demodulated signal is received, and may provide the control unit 450 with a predetermined transmission coil identifier corresponding to the identified transmission coil.
  • the wireless power transmitter 400 may obtain the signal strength indicator through in-band communication using the same frequency used for wireless power transmission to communicate with the wireless power receiver.
  • the wireless power transmitter 400 may not only transmit wireless power using the transmission coil 422 but may also exchange various information with the wireless power receiver through the transmission coil 422.
  • the wireless power transmitter 400 may exchange various information with the wireless power receiver through the short range communication unit 440.
  • the storage unit 470 may store packet information received according to the wireless power transmission procedure of FIGS. 2 to 3. In more detail, the storage unit 470 receives power when any one of a signal strength packet transmitted in the ping step and a configuration packet and an identification packet transmitted in the configuration and identification steps is transmitted to the power transmission step 240 or 360. Information of the packet received in the transmission step 240 or 360 may be stored. In addition, the storage unit 470 may store identifier information, application information, and the like, which the local area communication unit 440 communicates with the wireless power receiver, according to an exemplary embodiment.
  • FIG. 5 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to FIG. 4.
  • the wireless power receiver 500 includes a receiving coil 510, a rectifier 520, a DC / DC converter 530, a battery 540, a sensing unit 550, and a communication unit ( 560, a controller 570, and a short range communication unit 580 may be configured.
  • the receiving coil 610 may be configured to include a plurality of receiving coils (not shown). Frequency of AC power delivered to each receiving coil (not shown) according to the embodiment may be different from each other, and another embodiment of the present invention provides a predetermined frequency controller having a function of differently adjusting the LC resonance characteristics for each receiving coil. It is also possible to set different resonant frequencies for each receiving coil.
  • the receiving coil 510 may convert the strength of the rectifier output DC power from the DC / DC converter 530 into power of an intensity capable of activating the display of the wireless power receiver and transmit the power to the display.
  • the sensing unit 550 may measure the intensity of the rectifier 520 output DC power and provide it to the controller 570. In addition, the sensing unit 550 may measure the strength of the current applied to the receiving coil 510 according to the wireless power reception and transmit the measurement result to the control unit 570. In addition, the sensing unit 550 may measure the internal temperature of the wireless power receiver 500 and provide the measured temperature value to the controller 570.
  • the controller 570 may determine whether the overvoltage is generated by comparing the measured rectifier output DC power with a predetermined reference value. As a result, when an overvoltage occurs, a predetermined packet indicating that the overvoltage has occurred may be generated and transmitted to the modulator 562. The signal modulated by the modulator 562 may be transmitted to the wireless power transmitter through the receiving coil 510 or the short range communication unit 580.
  • control unit 570 may determine that the detection signal is received when the intensity of the rectifier output DC power is greater than or equal to a predetermined reference value.
  • a signal strength indicator corresponding to the detection signal is wirelessly transmitted through the modulator 562. Control to be transmitted to the power transmitter.
  • the controller 570 may determine that power transmission is interrupted. It can be controlled to be transmitted to the wireless power transmitter.
  • the controller 570 may control to receive power for activating the display unit of the wireless power receiver from the wireless power transmitter when the wireless power transmitter is connected.
  • the strength of the power capable of activating the display unit may be equal to, lower, or higher than power for charging the battery 540.
  • the controller 570 may control to perform the authentication operation of the short range communication unit 580 in a state where the display unit is temporarily turned on.
  • the controller 570 may control the short range communication unit 580 of the wireless power receiver 500 to perform short range communication with the short range communication unit configured in the wireless power transmitter. That is, the controller 570 may detect a short range communication authentication or data transmission / reception signal from the short range communication unit of the wireless power transmitter, and control the short range communication unit 580 to transmit and receive the corresponding data.
  • FIG. 6 is a top view illustrating the structure of a transmission coil and a short range communication antenna of a wireless power transmitter according to the present embodiment.
  • the apparatus for transmitting power wirelessly may form a near field communication antenna 114 around the transmitting coil 116 and the transmitting coil 116 and may be mounted on the substrate 118.
  • the transmission coil 116 may execute any one of a power transmission method of a resonance or an induction power transmission method.
  • the near field communication antenna 114 may be used for power transmission in addition to the operation for the near field communication.
  • the wireless power transmitter When the wireless power transmitter coupled with the short-range communication unit is mounted inside the vehicle, the wireless power transmitter may provide various functions and services of the vehicle through short-range communication with the wireless power receiver.
  • the wireless power transmitter checks the short range communication identification information (for example, NFC Unique ID) of the wireless power receiver, and allows the wireless power receiver to directly connect with the Bluetooth speaker mounted in the vehicle without a separate device search process.
  • Bluetooth simple pairing can be implemented.
  • the short-range communication identification number of the wireless power receiver may be stored in advance, and the setting state of the vehicle may be adjusted according to the user for each wireless power receiver. For example, if the user's mobile phone is placed on the wireless power transmitter, the user's mobile phone automatically adjusts the stored settings (e.g., seat adjustment, mirror adjustment, etc.) when the user uses the vehicle according to the near field identification number of the mobile phone. You can proceed. Alternatively, if the user 2's mobile phone is placed on the wireless power transmitter, the stored settings (e.g. seat adjustment, mirror adjustment, etc.) are automatically performed when the user 2 uses the vehicle according to the near field communication identification number of the mobile phone. Can be.
  • the stored settings e.g., seat adjustment, mirror adjustment, etc.
  • the vehicle may implement the setting through a short range with the wireless power transmitter.
  • wireless power receivers differ in the functions they can perform or provide, depending on the standby mode (eg, Sleep Mode) or active mode (eg, Wake-up Mode).
  • the near field communication application installed in the wireless power receiver must be in an active mode (eg, wake-up mode).
  • the short-range communication identification information of the wireless power receiver may be exchanged in the standby mode, but the wireless power receiver may be switched to the active mode to perform Bluetooth simple paying operation or to exchange information stored in a specific application of the wireless power receiver. Only if it can be converted.
  • the wireless power receiver is in the standby mode, there is an inconvenience that the user has to switch to the active mode through a separate operation according to the required function.
  • An effective way to allow the wireless power receiver to switch to an active mode capable of executing a particular application is to screen on the wireless power receiver.
  • the wireless power transmitter automatically switches the wireless power receiver to the active mode, the user can automatically activate a specific application of the wireless power receiver without using any additional operation and use various services without inconvenience. .
  • the short range communication may be deactivated when the wireless power transmitter performs wireless charging.
  • FIG. 7 is a flowchart illustrating an operation for performing short-range communication between a wireless power transmitter and a wireless power receiver according to an embodiment.
  • the wireless power transmitter 710 when the wireless power transmitter 710 is connected to the wireless power receiver 720, the wireless power transmitter 710 performs a selection step of transmitting an analog ping to the wireless power receiver 720 (S702).
  • the wireless power transmitter 710 transitions to the ping step S704 to transmit a digital ping to the wireless power receiver 720 and correspondingly, the wireless power receiver 720 transmits signal strength. do.
  • the wireless power transmitter 710 and the wireless power receiver 720 transition to the identification and configuration step S706 after the ping step S704 so that the wireless power receiver 720 transmits the identification information and the configuration information to the wireless power transmitter 710. send.
  • the wireless power transmitter 710 may perform power transmission to the wireless power receiver 720.
  • the transmitted power may transmit power at a level capable of activating the display unit of the wireless power receiver 720 in addition to the power transmission for charging the battery of the wireless power receiver 720 (S708).
  • the wireless power transmitter 710 performs an authentication operation for performing short range wireless communication.
  • the wireless power transmitter 710 executes power transmission to activate the display unit of the wireless power receiver 720.
  • the level of power transfer may be a power level for charging a battery of the wireless power receiver.
  • the wireless power transmitter 710 may transmit power of a threshold level for activating the display unit.
  • the wireless power receiver 720 may transition to a power transmission step and turn on the display unit based on the power transmitted from the wireless power transmitter 710.
  • the wireless power receiver 720 may be included in an electronic device (eg, a user mobile phone). Accordingly, the display unit of the electronic device may be activated by the power applied to the wireless power receiver 720 (S710).
  • the wireless power transmitter 710 may receive a control error packet (CEP) from the wireless power receiver 720 while transmitting power to the wireless power receiver 720 according to the execution of the power transmission step (S712).
  • the packet CEP may have a value capable of controlling the strength of power applied from the wireless power transmitter 710 to the wireless power receiver 720.
  • the control error packet (CEP) is transmitted from the wireless power receiver 720 to the wireless power transmitter 710 may be defined as the power transmission.
  • the wireless power transmitter 710 stops power transmission (S714). That is, the wireless power transmitter 710 transmits power. In the first step, power transmission is performed to activate the display unit of the wireless power receiver, not to transmit power for charging the battery of the wireless power receiver. Therefore, the wireless power transmitter 710 may resume or stop the power transmission step according to the authentication result after the short range communication authentication with the wireless power receiver 720.
  • the wireless power transmitter 710 When the wireless power transmitter 710 receives the control error packet CEP from the wireless power receiver 720, the wireless power transmitter 710 may perform mutual short-range communication authentication in a state in which power transmission is stopped (S716). The operation is described in detail in FIG. 9 below.
  • FIG. 8 is a flowchart illustrating an operation of performing a short range communication between a wireless power transmitter and a wireless power receiver according to another embodiment.
  • the wireless power transmitter 810 executes a selection step of transmitting an analog ping to the wireless power receiver 820.
  • the wireless power transmitter 810 transitions to the ping step S804 to transmit a digital ping to the wireless power receiver 820, and correspondingly, the wireless power receiver 820 transmits signal strength. do.
  • the wireless power transmitter 810 and the wireless power receiver 820 transition to the identification and configuration step after the ping step S804, and the wireless power receiver 820 transmits the identification information and the configuration information to the wireless power transmitter 810.
  • the wireless power transmitter 810 transmits power for activating the display unit of the wireless power receiver 820 (S810).
  • the wireless power transmitter 810 and the wireless power receiver 820 detects an interconnection state in the identification and configuration phase, and the identification and configuration phase before the wireless power transmitter 810 transitions to the power transmission phase. In this case, the display of the wireless power receiver 820 transmits power that can be activated.
  • the wireless power receiver 820 may receive power for activating the display unit from the wireless power transmitter 810 and activate the corresponding display unit (S802).
  • the wireless communication receiver transitions to the near field communication authentication step. That is, when the display unit is activated, the wireless power receiver 820 operates in an initial operation state for performing near field communication. Therefore, the wireless power transmitter 810 and the wireless power receiver 820 perform an authentication step for mutual short-range communication. At this time, the wireless power transmitter 810 stops the transmission of the display unit activation power transmitted to the wireless power receiver 820. (S814) Specifically, the wireless power transmitter 810 transmits power to the wireless power receiver 820. In this case, the power transmission step is performed to activate the display unit of the wireless power receiver 820 instead of transmitting power. Therefore, the temporarily executed power transfer step can be terminated in the near field communication authentication step before the transition to the normal power transfer step.
  • the wireless power transmitter 810 transitions to the power transmission step according to the short-range communication authentication result and resumes power transmission or does not execute the power transmission step.
  • the short range communication mode may be performed (S818).
  • the wireless power transmitter 810 when the short range communication authentication step with the wireless power receiver 820 is completed, the wireless power transmitter 810 transitions to a power transmission step and the battery of the wireless power receiver 820. Power transmission to charge the can be performed.
  • the wireless power transmitter 810 and the wireless power receiver 820 may perform a short range communication step without executing a power transmission step.
  • the wireless power transmitter 810 and the wireless power receiver 810 may perform a multi-operation that performs near field communication while executing a power transmission step.
  • the wireless power transmitter and the wireless power receiver may perform short-range communication without the display unit activation power transmission step after the identification and configuration steps. Authentication can be performed.
  • the wireless power transmitter and the wireless power receiver when the display unit of the wireless power receiver is activated and connected to the wireless power transmitter, the wireless power transmitter and the wireless power receiver perform a power transmission step before the short range communication authentication step. Thereafter, if the control error packet (CEP) is received from the wireless power receiver during the power transmission step, the wireless power transmitter may stop the power transmission step and perform a near field communication authentication step.
  • CEP control error packet
  • FIG. 9 is a flowchart illustrating a short-range communication operation according to the present embodiment.
  • the wireless power transmitter transmits a short range communication signal to a wireless power receiver (S902). Specifically, the wireless power transmitter performs short range communication authentication in a power transmission step or an identification and configuration step according to another embodiment.
  • the short-range communication signal can be transmitted.
  • the wireless power transmitter determines whether a response signal corresponding to the short range communication signal is received from the wireless power receiver (S904).
  • the response signal may include a confirmation signal for near field communication authentication.
  • the wireless power transmitter When the wireless power transmitter receives a response signal corresponding to the short range communication signal transmitted from the wireless power receiver, the wireless power transmitter checks the response signal (S906).
  • the performing of the confirming step may be a step of confirming an authentication signal included in the response signal and performing an authentication step of the wireless power transmitter and the wireless power receiver.
  • the wireless power transmitter may perform near field communication authentication and determine whether the authentication step is completed (S908).
  • the wireless power transmitter may determine whether a short range communication application of the corresponding wireless power receiver is detected by transmitting a short range communication signal to the wireless power receiver (S910).
  • the wireless power transmitter may determine that the short range communication application does not exist and execute the wireless charging operation of the power transmission step (S916).
  • the wireless power transmitter may execute the corresponding application. (S912) The wireless power transmitter determines whether to execute the power transmission step for wireless charging.
  • the wireless power transmitter determines that the wireless charging mode execution request is detected, the wireless power transmitter executes the wireless charging mode for executing power transmission to the wireless power receiver (S916).
  • power transmission for temporarily activating the display unit of the wireless power receiver is temporarily executed before the short-range communication authentication step is executed. Thereafter, the power transmission step or the short-range communication step may be executed according to the short-range communication authentication result.
  • FIG. 10 illustrates a processing operation for a short range communication signal during a short range communication authentication step.
  • FIG. 10 is a flowchart illustrating a data storage operation during a short-range communication authentication operation according to the present embodiment.
  • the wireless power transmitter executes a short range communication authentication mode (S1002) and determines whether authentication with the wireless power receiver is completed in the authentication step (S1004).
  • the wireless power transmitter may store identification information and executable application information of the wireless power receiver when the short range communication authentication is completed with the wireless power receiver. (S1006) Specifically, the wireless power transmitter is authenticated when the wireless power receiver is first connected. According to the information stored in the storage unit.
  • the stored information may be used later when the wireless power receiver performs short-range communication with the wireless power transmitter again. Therefore, when short-range communication is performed again later, the short-range communication authentication step may be omitted based on previously stored information.
  • the wireless power transmitter stores identification information of the wireless power receiver for short range communication and application information corresponding thereto, and ends the short range communication authentication performing mode (S1008).
  • 11 is a flowchart illustrating an operation of performing a near field communication with a wireless power receiver by a wireless power transmitter according to another embodiment.
  • the wireless power transmitter when the wireless power transmitter detects that an object is placed on the interface surface (S1102), the wireless power transmitter may perform a sensing operation of a near field communication integrated circuit (NFC IC) configured in the wireless power receiver. As a result, the wireless power transmitter may determine that the NFC IC exists when transmitting a signal for detecting whether the NFC IC exists in the wireless power receiver and receiving a response signal thereto.
  • NFC IC near field communication integrated circuit
  • the wireless power transmitter may shift the operation state to the standby mode support operation.
  • the standby mode support operation the NFC unique ID and the NFC received from the wireless power receiver in the NFC IC detection step.
  • the operation of executing the in-vehicle setting state corresponding to the unique ID may be performed.
  • An example of the setting state may be information corresponding to the vehicle use state of the user, such as seat adjustment or mirror adjustment, as described above.
  • the display unit of the wireless power receiver may be turned off.
  • the wireless power transmitter may execute the ping step S1108 and the identification / configuration step S1110, which are operations before the power transmission step.
  • the wireless power transmitter may transmit a signal for switching the active mode to the identified wireless power receiver after the identification / configuration step S1110.
  • the signal for switching the active mode may include a display unit of the wireless power receiver. Power transfer to activate may be performed.
  • the wireless power transmitter may check whether there is an active mode support operation of the wireless power receiver after the activation mode switching—the display activation power transmission—S1114. Specifically, the wireless power transmitter activates the display by switching the active mode. It is checked whether the NFC application is executed from the wireless power receiver. That is, the wireless power transmitter may determine whether there is an NFC application that can be executed in advance by a user request in the wireless power receiver.
  • the wireless power transmitter executes an active mode support operation for executing the application (S1116).
  • the wireless power transmitter may perform an active mode switching operation after partially activating a function of the wireless power receiver.
  • the wireless power transmitter proceeds to the ping step (S1118), identification / configuration step (S1120) power transmission step (S1122) can be executed.
  • the wireless power transmitter and the wireless power receiver execute a power transmission step, and when the preset power transmission is completed, terminate the current power transmission step (S1124).
  • FIG. 12 is a flowchart illustrating an operation of performing a near field communication with a wireless power receiver by a wireless power transmitter according to another embodiment.
  • the wireless power transmitter may execute a power transmission step after a pinging step and an identification / configuration step (S1202).
  • S1202 an identification / configuration step
  • the wireless power transmitter may determine whether an NFC support operation request is detected from the wireless power receiver during the power transmission step. In detail, the wireless power transmitter may determine whether an NFC operation request signal is received from the wireless power receiver during power transmission to the wireless power receiver.
  • the wireless power transmitter When the wireless power transmitter detects the NFC support operation request from the wireless power receiver, the wireless power transmitter stops the power transmission step that is being executed. (S1206) Specifically, the NFC support request signal is detected by the wireless power transmitter and the wireless power receiver during wireless charging. If so, interference with near field communication or power transmission for radio charging should be stopped to protect the device of the transmitter or the receiver.
  • the wireless power transmitter may switch the operation state in which power transmission is stopped to the standby mode support operation.
  • the standby mode support operation requests the NFC support operation.
  • an NFC unique ID received from the wireless power receiver and an in-vehicle setting state corresponding to the NFC unique ID may be executed.
  • An example of the setting state may be information corresponding to the vehicle use state of the user, such as seat adjustment or mirror adjustment, as described above.
  • the display unit of the wireless power receiver may be turned off.
  • the wireless power transmitter may transmit a signal for switching the active mode to the wireless power receiver.
  • the signal for switching the active mode may execute power transmission for activating the display unit of the wireless power receiver.
  • the wireless power transmitter may check whether there is an active mode support operation of the wireless power receiver after the active mode switch-display activating power transmission (S1212). Specifically, the wireless power transmitter activates the display by switching the active mode. It is checked whether the NFC application is executed from the wireless power receiver. That is, the wireless power transmitter may determine whether there is an NFC application that can be executed in advance by a user request in the wireless power receiver.
  • the wireless power transmitter executes an active mode support operation for executing the corresponding application (S1214).
  • the wireless power transmitter may perform an active mode switching operation after partially activating a function of the wireless power receiver.
  • the wireless power transmitter may resume the power transfer mode in the state before the NFC support operation request is detected. (S1216)
  • the wireless power transmitter and the wireless power receiver may proceed with the power transmission step, and when the preset power transmission is completed, the corresponding power transmission step may be terminated (S1218).
  • the present invention can be used in the field of wireless power transmission and reception.

Abstract

Selon un mode de réalisation, l'invention concerne un procédé de régulation de transmission d'énergie sans fil d'un émetteur d'énergie sans fil qui émet sans fil de l'énergie à un récepteur d'énergie sans fil. Un procédé de régulation de transmission d'énergie sans fil d'un émetteur d'énergie sans fil selon le présent mode de réalisation comprend les étapes consistant : à détecter un récepteur d'énergie sans fil ; à détecter un circuit intégré de communication à faible portée du récepteur d'énergie sans fil ; à commuter le récepteur d'énergie sans fil dans un mode activé par communication à faible portée ; et à émettre de l'énergie de charge au récepteur d'énergie sans fil.
PCT/KR2018/006055 2017-05-30 2018-05-29 Procédé de régulation de transmission d'énergie sans fil d'un émetteur d'énergie sans fil WO2018221917A1 (fr)

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KR1020170066876A KR20180130812A (ko) 2017-05-30 2017-05-30 무선전력 송신 제어 방법
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KR102575229B1 (ko) * 2018-12-31 2023-09-05 엘지전자 주식회사 무선 충전 시스템

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