[go: up one dir, main page]

WO2018124669A1 - Procédé de charge sans fil et appareil et système associés - Google Patents

Procédé de charge sans fil et appareil et système associés Download PDF

Info

Publication number
WO2018124669A1
WO2018124669A1 PCT/KR2017/015413 KR2017015413W WO2018124669A1 WO 2018124669 A1 WO2018124669 A1 WO 2018124669A1 KR 2017015413 W KR2017015413 W KR 2017015413W WO 2018124669 A1 WO2018124669 A1 WO 2018124669A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
wireless power
packet
transmitter
wireless
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2017/015413
Other languages
English (en)
Korean (ko)
Inventor
권용일
유동한
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Innotek Co Ltd
Original Assignee
LG Innotek Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Innotek Co Ltd filed Critical LG Innotek Co Ltd
Publication of WO2018124669A1 publication Critical patent/WO2018124669A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/24—Negotiation of communication capabilities

Definitions

  • the present invention relates to wireless power transfer technology, and more particularly, to a wireless charging method and apparatus and system therefor.
  • 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 energy of low power in an RF signal.
  • the wireless power transmitter has increased heat and electromagnetic wave emission by high output. If the temperature increases due to heat generation, the wireless power transmitter may cause problems such as deterioration of wireless power transmission performance or damage to an internal system. In addition, the high electromagnetic waves emitted by the wireless power transmitter may be harmful to the human body, and may cause a problem of Electro Magnetic Compatibility (EMC). As an example of electronic compatibility, the frequency of the wireless charging system and the frequency of the vehicle smart key may cause interference.
  • EMC Electro Magnetic Compatibility
  • the present invention has been devised to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a wireless charging method and apparatus and system therefor.
  • Still another object of the present invention is to provide a wireless charging method capable of controlling charging power according to a state of a wireless power transmission apparatus, and an apparatus and system therefor.
  • Still another object of the present invention is to provide a wireless charging method capable of controlling the charging power of the wireless power transmission apparatus, and an apparatus and system therefor.
  • the wireless power transmitter includes a power transmitter including one or more transmission coils; A power converter converting the intensity of DC power applied from the outside; A communication unit exchanging information with an external device; And a controller for changing a power transmission contract by transmitting a predetermined packet through the communication unit.
  • the power transmission contract may include guaranteed power which is a power strength value transmitted by the power transmitter in the power transmission step.
  • control unit may collect wireless power transmitter state information and transition to the renegotiation step based on the wireless power transmitter state information.
  • the transmitter state information may include a guaranteed power value that can be transmitted by the wireless power transmitter.
  • the guaranteed power value may be recorded in a power transmitter capability packet.
  • control unit may transition to a renegotiation step by transmitting a NAK packet after receiving a received power packet.
  • the wireless power transmitter may transmit the power transmitter capability packet after receiving the general request packet.
  • control unit may transmit the power transmitter capability packet after receiving the renegotiation packet.
  • the wireless power transmitter includes a sensing unit for measuring the internal temperature, the electromagnetic wave intensity emitted from the power transmitter or the intensity of the external electromagnetic wave, the control unit is measured internal temperature value, electromagnetic wave intensity value of the sensing unit Alternatively, the renegotiation step may be performed to change the power transmission contract based on the intensity value of the external electromagnetic wave.
  • a wireless power receiver includes a receiving coil; A communication unit exchanging information with an external device through the receiving coil; And a controller for transitioning to a renegotiation step according to the control of the external device.
  • the wireless power receiver may transition to the renegotiation step when the controller transmits a received power packet to the external device and receives a NAK packet from the external device.
  • the received power packet may be a 24-bit received power packet.
  • the wireless power receiver may transmit the general request packet after receiving the NAK packet.
  • the wireless power receiver may receive the power transmitter capability packet after transmitting the general request packet.
  • the wireless power receiver may transmit the renegotiation packet after receiving the NAK packet.
  • the wireless power receiver may receive a power transmitter capability packet after transmitting the renegotiation packet.
  • the wireless charging method is a wireless charging method in a wireless power transmitter for transmitting power wirelessly to a wireless power receiver, in the power transmission step, the wireless power transmitter is a power to a guaranteed power value according to a power transmission contract Transmitting;
  • the wireless power transmitter collecting transmitter status information; Determining, by the wireless power transmitter, whether a transition is necessary to a renegotiation step based on the collected transmitter state information; And when the renegotiation step is required, transmitting the NAK packet after the reception of the received power packet to transition to the renegotiation step.
  • the wireless charging method may further include transmitting a power transmitter capability packet when the wireless power transmitter receives the general request packet after the transition to the renegotiation step.
  • the wireless charging method may further include transmitting a power transmitter capability packet when the wireless power transmitter receives the renegotiation packet after the transition to the renegotiation step.
  • the wireless charging method may further include determining whether the wireless power transmitter has transitioned to a power transmission step in the renegotiation step.
  • the wireless charging method according to the embodiment may further include the step of transitioning to the power transmission step by modifying the guaranteed power value of the power transmission contract if it is determined that the transition to the power transmission step. .
  • the power transmission contract may include guaranteed power, which is a power strength value transmitted by the power transmitter in a power transmission step.
  • the transmitter state information may include a guaranteed power value that can be transmitted by the wireless power transmitter.
  • the guaranteed power value may be recorded in a power transmitter capability packet.
  • a wireless charging method provides a wireless charging method in a wireless power receiver for wirelessly receiving power from a wireless power transmitter, wherein the wireless power receiver comprises: transmitting a received power packet;
  • the wireless power receiver may include the step of transitioning to a renegotiation step by receiving a NAK packet and transmitting a general request packet.
  • the received power packet may be a 24-bit received power packet.
  • the general request packet may be a packet for requesting a power transmitter capability packet from the wireless power transmitter.
  • the wireless charging method according to the embodiment may further comprise the step of determining whether the wireless power receiver transitions to the power transmission step in the renegotiation step.
  • a wireless charging method provides a wireless charging method in a wireless power receiver for wirelessly receiving power from a wireless power transmitter, wherein the wireless power receiver comprises: transmitting a received power packet;
  • the wireless power receiver may include a step of transmitting a renegotiation packet and transitioning to a renegotiation step after receiving the NAK packet.
  • the received power packet may be a 24-bit received power packet.
  • the wireless charging method according to the embodiment may further comprise the step of receiving the power transmitter capability packet from the wireless power transmitter after the transition to the renegotiation step.
  • the wireless charging method according to the embodiment may further comprise the step of determining whether the wireless power receiver transitions to the power transmission step in the renegotiation step.
  • the present invention can provide a wireless charging method and apparatus and system therefor.
  • the present invention can control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmission apparatus may control the charging power.
  • the present invention can control the charging power to reduce the heat generation of the wireless power transmission apparatus.
  • the present invention can control the charging power to reduce the electromagnetic emission of the wireless power transmission apparatus.
  • the present invention can minimize the charging time by increasing the strength of the charging power.
  • the present invention can reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • the present invention can have a wider charging area by using a plurality of transmission coils, and thus user convenience is high.
  • the present invention can use only one of a plurality of the same circuit can reduce the size of the wireless power transmitter itself, it is possible to reduce the cost of the components used.
  • the present invention may utilize component elements defined in the published wireless power transfer standards, which may be in accordance with already defined standards.
  • FIG. 1 is a block diagram illustrating a wireless charging system according to an embodiment.
  • FIG. 2 is a block diagram illustrating a wireless charging system according to another embodiment.
  • FIG. 3 is a diagram for describing a detection signal transmission procedure in a wireless charging system according to an embodiment.
  • FIG. 4 is a state transition diagram for explaining a wireless power transmission procedure defined in the WPC standard.
  • 5 is a state transition diagram for explaining a wireless power transmission procedure defined in the WPC (Qi) standard.
  • FIG. 6 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
  • FIG. 7 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to FIG. 6.
  • FIG. 8 is a diagram for describing a method of modulating and demodulating a wireless power signal, according to an exemplary embodiment.
  • FIG. 9 is a diagram for describing a packet format, according to an exemplary embodiment.
  • FIG. 10 is a diagram for describing types of packets transmitted from a wireless power receiver to a wireless power transmitter, according to an embodiment.
  • FIG. 11 illustrates a signal strength packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 12 is a diagram for describing a power transmission end packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 13 is a diagram for describing a power control suspension packet according to a wireless power transmission procedure according to one embodiment.
  • FIG. 14 illustrates a configuration packet according to a wireless power transmission procedure according to an embodiment.
  • 15 illustrates an identification packet and an extended identification packet according to a wireless power transmission procedure according to an embodiment.
  • 16 illustrates a general request packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 17 illustrates a special request packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 18 is a diagram illustrating a FOD status packet according to a wireless power transmission procedure according to an embodiment.
  • 19 illustrates a control error packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 20 illustrates a renegotiation packet according to a wireless power transmission procedure according to an embodiment.
  • 21 illustrates a message format of an 8-bit received power packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 22 illustrates a 24-bit received power packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 23 illustrates a message format of a charging state packet according to a wireless power transmission procedure according to an embodiment.
  • FIG. 24 illustrates a packet transmitted from a wireless power transmitter to a wireless power receiver and a power transmitter capability packet according to a wireless power transmission procedure according to an embodiment.
  • 25 is a diagram for describing a wireless charging method on a wireless charging system, according to an exemplary embodiment.
  • FIG. 26 illustrates a wireless charging method including a renegotiation step on a wireless charging system according to another embodiment.
  • FIG. 27 is a diagram for describing a wireless charging method including a renegotiation step on a wireless charging system according to another embodiment.
  • FIG. 28 is a diagram for describing a wireless charging method in a wireless power transmitter, according to an embodiment.
  • 29 is a diagram for describing a wireless charging method in a wireless power receiver, according to an embodiment.
  • FIG. 30 is a diagram for describing a wireless charging method including a renegotiation step on a wireless charging system according to another embodiment.
  • FIG. 31 illustrates a wireless charging method including a renegotiation step on a wireless charging system according to another embodiment.
  • 32 is a diagram for describing a wireless charging method of a wireless power transmitter according to another embodiment.
  • 33 is a view for explaining a wireless charging method in a wireless power receiver according to another embodiment.
  • 34 is a diagram illustrating a renegotiation step time in a wireless charging method, according to an embodiment.
  • 35 is a diagram for describing a wireless charging transmission coil, according to an exemplary embodiment.
  • 36 is a diagram for describing three drive circuits including a full-bridge inverter in a wireless power transmitter including a plurality of coils, according to an exemplary embodiment.
  • FIG. 37 is a diagram for describing a wireless power transmitter including a plurality of coils and a single drive circuit, according to an exemplary embodiment.
  • 38 is a diagram for describing a plurality of switches connecting one of a plurality of transmission coils to a drive circuit according to an exemplary 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 small electronic devices such as a toothbrush, an electronic tag, a lighting device, a remote control, a fishing bobber, and the like, but is not limited to this.
  • 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 of the 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 a running application, CPU usage information, battery charge status information, battery output voltage / current information, and the like.
  • the information may be obtained from the electronic device 30 and may be utilized for wireless power control.
  • FIG. 2 is a block diagram illustrating a wireless charging system according to another embodiment.
  • the wireless power receiver 20 may be configured with a plurality of wireless power receivers, and a plurality of wireless power receivers are connected to one wireless power transmitter 10 so that the wireless Charging may also be performed.
  • the wireless power transmitter 10 may distribute and transmit power to the plurality of wireless power receivers in a time division manner, but is not limited thereto.
  • the wireless power transmitter 10 may be configured for each wireless power receiver. By using different allocated frequency bands, power may be distributed and transmitted to a plurality of wireless power receivers.
  • the number of wireless power receivers that can be connected to one wireless power transmitter is adapted based on at least one of required power for each wireless power receiver, battery charge state, power consumption of the electronic device, and available power of the wireless power transmitter. Can be determined as
  • the wireless power transmitter 10 may include a plurality of wireless power transmitters.
  • the wireless power receiver 20 may be connected to a plurality of wireless power transmitters at the same time, and may simultaneously receive power from the connected wireless power transmitters and perform charging.
  • the number of wireless power transmitters connected to the wireless power receiver 20 is adaptively based on the required power of the wireless power receiver 20, the state of charge of the battery, the power consumption of the electronic device, the available power of the wireless power transmitter, and the like. Can be determined.
  • FIG. 3 is a diagram for describing a detection signal transmission procedure in a wireless charging system according to an embodiment.
  • the wireless power transmitter may be equipped with three transmitting coils 111, 112, and 113. Each transmission coil may overlap some other area with another transmission coil, and the wireless power transmitter may detect a predetermined detection signal 117, 127 for detecting the presence of the wireless power receiver through each transmission coil, for example, Digital ping signals are sent sequentially in a predefined order.
  • the wireless power transmitter sequentially transmits the detection signal 117 through the primary detection signal transmission procedure illustrated in FIG. 110, and receives a signal strength indicator from the wireless power receiver 115.
  • the strength indicator 116 (or signal strength packet) may identify the received transmission coils 111, 112.
  • the wireless power transmitter sequentially transmits the detection signal 127 through the secondary detection signal transmission procedure shown in FIG. 120, and transmits power among the transmission coils 111 and 112 where the signal strength indicator 126 is received.
  • the reason why the wireless power transmitter performs two sensing signal transmission procedures is to more accurately identify which transmitting coil is well aligned with the receiving coil of the wireless power receiver.
  • the wireless power transmitter Based on the signal strength indicator 126 received at each of the first transmitting coil 111 and the second transmitting coil 112 selects the best-aligned transmitting coil and performs wireless charging using the selected transmitting coil. .
  • FIG. 4 is a state transition diagram for explaining a wireless power transmission procedure defined in the WPC standard.
  • power transmission from a transmitter to a receiver according to the WPC standard is largely selected from a selection phase 410, a ping phase 420, an identification and configuration phase 430, It may be divided into a power transfer phase 440.
  • the selection step 410 may be a step of transitioning when a specific error or a specific event is detected while starting or maintaining the 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, it may transition to the ping step 420 (S401).
  • the transmitter transmits a very short pulse of an analog ping signal, and may detect whether an object exists in an active area of the interface surface based on a change in current of a transmitting coil.
  • ping step 420 when an object is detected, 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 (for example, a signal strength indicator) from the receiver in response to the digital ping in step 420, it may transition back to the selection step 410 (S402). In addition, in the ping step 420, when the transmitter receives a signal indicating that power transmission is completed, that is, a charging completion signal, from the receiver, the transmitter may transition to the selection step 410 (S403).
  • a response signal for example, a signal strength indicator
  • the transmitter may transition to the identification and configuration step 430 for collecting receiver identification and receiver configuration and status information (S404).
  • 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 (410) (S405).
  • the transmitter may transition to a power transmission step 440 for transmitting wireless power (S406).
  • the transmitter receives an unexpected packet, the desired packet has not been received for a predefined time, or a violation of a preset power transfer contract occurs. transfer contract violation), if the filling is completed, the transition to the selection step (410) (S407).
  • the transmitter may transition to the identification and configuration step 430 (S408).
  • 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.
  • 5 is a state transition diagram for explaining a wireless power transmission procedure defined in the WPC (Qi) standard.
  • power transmission from a transmitter to a receiver according to the WPC (Qi) standard is largely selected as a selection phase 510, a ping phase 520, an identification and configuration phase, and so on. 530, a negotiation phase 540, a calibration phase 550, a power transfer phase 560, and a renegotiation phase 570.
  • the selection step 510 may be a transition step, for example, S502, S504, S507, S510, and S512 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 520 (S501). In the selection step 510, 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
  • ping step 520 when an object is detected, 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 (eg, a signal strength packet) for the digital ping from the receiver in the ping step 520, it may transition back to the selection step 510 (S502). In addition, in the ping step 520, when the transmitter receives a signal indicating that power transmission is completed, that is, a charging completion packet, it may transition to the selection step 510 (S502).
  • a response signal eg, a signal strength packet
  • the transmitter may transition to the identification and configuration step 530 for identifying the receiver and collecting receiver configuration and status information (S503).
  • 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 (510) (S504).
  • the transmitter may determine whether entry into the negotiation step 540 is necessary based on a negotiation field value of the configuration packet received in the identification and configuration step 530.
  • the transmitter may enter a negotiation step 540 to perform a predetermined FOD detection procedure and make a power transmission contract (S505).
  • the transmitter may immediately enter the power transmission step 560 (S506).
  • the wireless power transmitter and the wireless power receiver may make a power transmission contract.
  • 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 power transfer agreement may include guaranteed power.
  • the guaranteed power of the power transmission contract may be a power intensity value determined by the wireless power transmitter and the wireless power receiver to transmit during wireless charging in the power transmission phase.
  • the guaranteed power of the power transfer agreement may have a default value.
  • the guaranteed power of the power transmission contract can be determined based on the guaranteed power of the wireless power transmitter and the required power of the wireless power receiver. A detailed description of determining the guaranteed power of a power transmission contract will be given later. Note that there is a difference between the guaranteed power of the power transmission contract and the guaranteed power of the wireless power transmitter.
  • the guaranteed power of the power transmission contract may be a power intensity value transmitted in the power transmission step
  • the guaranteed power of the wireless power transmitter may be a power intensity value that the wireless power transmitter can transmit.
  • the guaranteed power of the wireless power transmitter may be information recorded in the power transmitter capability packet, which will be described later.
  • the transmitter may receive a Foreign Object Detection (FOD) status packet including a reference quality factor value.
  • FOD Foreign Object Detection
  • the transmitter may determine a threshold for FO detection based on the reference quality factor value.
  • the transmitter may detect whether the FO exists in the charging region by using the determined threshold for FO detection and the currently measured quality factor value, and control power transmission according to the FO detection result. 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 510 (S507).
  • the transmitter may enter the power transmission step 560 through the correction step 550 (S508) (S509).
  • the transmitter determines the strength of the power received at the receiving end in the correction step 550, and determines the power loss at the receiving end and the transmitting end to determine the strength of the power transmitted by 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 550.
  • 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 complete, the transition to the selection step (510) (S510).
  • the transmitter may transition to the renegotiation step 570 (S511).
  • the transmitter may return to the power transmission step 560 (S513). Further, in the renegotiation step 570, the transmitter receives an unexpected packet, a desired packet has not been received for a predefined time, or a violation of a preset power transmission contract occurs ( power transfer contract violation), if the charging is completed, the transition to the selection step (510) (S512).
  • FIG. 6 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
  • the wireless power transmitter 600 may largely include a power converter 610, a power transmitter 620, a communication unit 630, a controller 640, and a sensor 650.
  • the configuration of the wireless power transmitter 600 is not necessarily an essential configuration, and may include more or fewer components.
  • the power converter 610 may perform a function of converting the power into power of a predetermined intensity.
  • the power converter 610 may include a DC / DC converter 611 and an amplifier 612.
  • the DC / DC converter 611 may perform a function of converting DC power supplied from the power supply unit 660 into DC power having a specific intensity according to a control signal of the controller 640.
  • the sensing unit 650 may measure the voltage / current of the DC-converted power and provide the same to the control unit 640. In addition, the sensing unit 650 may measure the internal temperature of the wireless power transmitter 600 to determine whether overheating occurs, and provide the measurement result to the controller 640. In addition, the sensing unit 650 may measure the electromagnetic wave intensity radiated from the power transmitter 620 to determine whether the electromagnetic wave is over-radiated, and provide the measurement result to the controller 640. In addition, the sensing unit 650 may measure the intensity and frequency of the external electromagnetic wave of the wireless power transmitter 600 and determine the electromagnetic interference, and may provide the measurement result to the controller 640.
  • the controller 640 adaptively supplies power from the power supply unit 650 based on the transmitter state information, the voltage / current value measured by the sensing unit 650, the internal temperature value, the electromagnetic wave value, the intensity and frequency of the external electromagnetic wave, and the like. Block the power supply to the amplifier 612.
  • one side of the power converter 610 may be further provided with a predetermined power cut-off circuit for cutting off the power supplied from the power supply unit 650, or cut off the power supplied to the amplifier 612.
  • control unit 640 and the wireless power receiver based on the transmitter status information, the voltage / current value, the internal temperature value, the electromagnetic wave intensity value, the intensity and frequency of the external electromagnetic wave measured in the power transmission step
  • the renegotiation phase can be performed to modify the power transfer agreement.
  • the controller 640 may generate a predetermined packet for performing the renegotiation step and transmit the predetermined packet to the modulator 631.
  • the signal modulated by the modulator 631 may be transmitted to the wireless power receiver through the transmitting coil 622 or a separate coil (not shown).
  • the controller 640 may perform a renegotiation step by transmitting a NAK packet after receiving a received power packet.
  • the amplifier 612 may adjust the intensity of the DC / DC converted power according to the control signal of the controller 640.
  • the controller 640 may receive power reception state information or (and) power control signal of the wireless power receiver through the communication unit 630, and may be based on the received power reception state information or (and) power control signal.
  • the amplification factor of the amplifier 612 can be dynamically adjusted.
  • 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 620 may include a multiplexer 621 (or a multiplexer) and a transmission coil 622.
  • the power transmitter 620 may further include a carrier generator (not shown) for generating a specific operating frequency for power transmission.
  • the carrier generator may generate a specific frequency for converting the output DC power of the amplifier 612 received through the multiplexer 621 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 612. Note that it may be mixed in stages or later.
  • 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 different resonant frequencies for each transmission coil.
  • the power transmitter 620 includes a multiplexer 621 and a plurality of transmit coils 622—that is, a first to control the output power of the amplifier 612 to be transmitted to the transmit coil. To n-th transmission coils.
  • the controller 640 may transmit power through time division multiplexing for each transmission coil. For example, three wireless power receivers, i.e., the first through third wireless power receivers, are identified in the wireless power transmitter 600 through three different transmission coils, i.e., the first through third transmission coils.
  • the controller 640 may control the multiplexer 621 to control power to be transmitted through a specific transmission coil in a specific time slot.
  • the amount of power transmitted to the corresponding wireless power receiver may be controlled according to the length of the time slot allocated to each transmitting coil, but this is only one embodiment.
  • By controlling the amplification factor of the amplifier 612 of the wireless power receiver may be controlled to transmit power.
  • the controller 640 may control the multiplexer 621 to sequentially transmit the sensing signals through the first to nth transmitting coils 622 during the first sensing signal transmission procedure.
  • the controller 640 may identify a time point at which the detection signal is transmitted by using the timer 655.
  • the control unit 640 controls the multiplexer 621 to detect the detection signal through the corresponding transmission coil. Can be controlled to be sent.
  • the timer 650 may transmit a specific event signal to the controller 640 at a predetermined period during the ping transmission step.
  • the controller 640 controls the multiplexer 621 to transmit the specific event signal.
  • the digital ping can be sent through the coil.
  • control unit 640 stores a predetermined transmission coil identifier and a corresponding transmission coil for identifying which transmission coil has received a signal strength indicator from the demodulator 632 during the first detection signal transmission procedure. Signal strength indicator received through the can be received. Subsequently, in the second detection signal transmission procedure, the control unit 640 controls the multiplexer 621 so that the detection signal may be transmitted only through the transmission coil (s) in which the signal strength indicator was received during the first detection signal transmission procedure. You may. As another example, the controller 640 transmits the second sensed signal to the transmit coil in which the signal strength indicator having the largest value is received when there are a plurality of transmit coils in which the signal intensity indicator is received during the first sensed signal transmit procedure. In the procedure, the sensing signal may be determined as the transmitting coil to be transmitted first, and the multiplexer 621 may be controlled according to the determination result.
  • the modulator 631 may modulate the control signal generated by the controller 640 and transmit the modulated control signal to the multiplexer 621.
  • 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 632 may demodulate the detected signal and transmit the demodulated signal to the controller 640.
  • the demodulated signal may include a signal strength indicator, an error correction (EC) indicator for controlling power during wireless power transmission, an end of charge (EOC) indicator, an overvoltage / overcurrent / overheat indicator, and the like.
  • EC error correction
  • EOC end of charge
  • the present invention is not limited thereto, and may include various state information for identifying a state of the wireless power receiver.
  • the demodulator 632 may identify from which transmission coil the demodulated signal is received, and may provide the control unit 640 with a predetermined transmission coil identifier corresponding to the identified transmission coil.
  • the wireless power transmitter 600 may obtain the signal strength indicator through in-band communication that communicates with the wireless power receiver using the same frequency used for wireless power transmission.
  • the wireless power transmitter 600 may not only transmit wireless power using the transmission coil 622 but also exchange various information with the wireless power receiver through the transmission coil 622.
  • the wireless power transmitter 600 further includes a separate coil corresponding to each of the transmission coils 622 (that is, the first to nth transmission coils), and wireless power using the separate coils provided. Note that in-band communication with the receiver may also be performed.
  • the wireless power transmitter 600 and the wireless power receiver perform in-band communication by way of example.
  • this is only one embodiment, and is a frequency band used for wireless power signal transmission.
  • Short-range bidirectional communication may be performed through a frequency band different from that of FIG.
  • the short-range bidirectional communication may be any one of low power Bluetooth communication, RFID communication, UWB communication, and Zigbee communication.
  • FIG. 7 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to FIG. 6.
  • the wireless power receiver 700 includes a receiving coil 710, a rectifier 720, a DC / DC converter 730, a load 740, a sensing unit 750, and a communication unit ( 760), and may include a main controller 770.
  • the communication unit 760 may include at least one of a demodulator 761 and a modulator 762.
  • the wireless power receiver 700 illustrated in the example of FIG. 7 is illustrated as being capable of exchanging information with the wireless power transmitter 600 through in-band communication, this is only one embodiment.
  • the communication unit 760 according to the embodiment may provide short-range bidirectional communication through a frequency band different from the frequency band used for wireless power signal transmission.
  • the AC power received through the receiving coil 710 may be delivered to the rectifier 720.
  • the rectifier 720 may convert AC power into DC power and transmit the DC power to the DC / DC converter 730.
  • the DC / DC converter 730 may convert the strength of the rectifier output DC power into a specific intensity required by the load 740 and then transfer it to the load 740.
  • the receiving coil 710 may include a plurality of receiving coils (not shown), that is, the first to nth receiving coils.
  • Frequency of AC power delivered to each receiving coil may be different from each other, another embodiment is a predetermined frequency controller with a function to adjust the LC resonance characteristics differently for each receiving coil It is also possible to set a different resonant frequency for each receiving coil by using a.
  • the sensing unit 750 may measure the intensity of the rectifier 720 output DC power and provide the same to the main controller 770. In addition, the sensing unit 750 may measure the strength of the current applied to the receiving coil 710 according to the wireless power reception, and may transmit the measurement result to the main controller 770. In addition, the sensing unit 750 may measure the internal temperature of the wireless power receiver 700 and provide the measured temperature value to the main controller 770.
  • the main controller 770 may determine whether the overvoltage occurs by comparing the measured intensity of the rectifier output DC power with a predetermined reference value. As a result of the determination, when the overvoltage is generated, a predetermined packet indicating that the overvoltage has occurred may be generated and transmitted to the modulator 762.
  • the signal modulated by the modulator 762 may be transmitted to the wireless power transmitter through the receiving coil 710 or a separate coil (not shown).
  • the main controller 770 may determine that a sensing signal has been received. When the sensing signal is received, a signal strength indicator corresponding to the sensing signal may be modulated. Can be transmitted to the wireless power transmitter.
  • the demodulator 761 demodulates an AC power signal or a rectifier 720 output DC power signal between the receiving coil 710 and the rectifier 720 to identify whether a detection signal is received, and then, the main subject of the identification result. It may be provided to the unit 770. In this case, the main controller 770 may control the signal strength indicator corresponding to the sensing signal to be transmitted through the modulator 762.
  • the main controller 770 may generate a predetermined packet for performing the renegotiation step and transmit the predetermined packet to the modulator 762.
  • the signal modulated by the modulator 762 may be transmitted to the wireless power receiver through the transmission coil 710 or a separate coil (not shown).
  • the main controller 770 may generate a general request packet for the power transmitter capability packet request and transmit the generated request packet to the modulator 762.
  • the main control unit 770 may generate a renegotiation packet and transmit it to the modulator 762.
  • FIG. 8 is a diagram for describing a method of modulating and demodulating a wireless power signal, according to an exemplary embodiment.
  • the wireless power transmitter 10 and the wireless power receiver 20 may encode or decode a transmission target packet based on an internal clock signal having the same period.
  • the wireless power signal when the wireless power transmitter 10 or the wireless power receiver 20 does not transmit a specific packet, the wireless power signal is modulated with a specific frequency, as shown by reference numeral 41 of FIG. 1. AC signal may not be.
  • the wireless power transmitter 10 or the wireless power receiver 20 transmits a specific packet the wireless power signal may be an AC signal modulated by a specific modulation scheme as shown in FIG.
  • the modulation scheme may include, but is not limited to, an amplitude modulation scheme, a frequency modulation scheme, a frequency and amplitude modulation scheme, a phase modulation scheme, and the like.
  • Differential bi-phase encoding may be applied to binary data of a packet generated by the wireless power transmitter 10 or the wireless power receiver 20 as shown in FIG.
  • differential two-stage encoding allows two state transitions to encode data bit 1 and one state transition to encode data bit zero. That is, data bit 1 is encoded such that a transition between a HI state and a LO state occurs at a rising edge and a falling edge of the clock signal, and data bit 0 is HI at the rising edge of the clock signal.
  • the transition between state and LO state may be encoded to occur.
  • the encoded binary data may be applied with a byte encoding scheme, as shown at 830.
  • the byte encoding scheme includes a start bit and a stop bit for identifying a start and type of a corresponding bit stream for an 8-bit encoded binary bit stream.
  • the method may be a method of inserting a parity bit for detecting whether an error of a corresponding bit stream (byte) occurs.
  • FIG. 9 is a diagram for describing a packet format, according to an exemplary embodiment.
  • a packet format 900 used for information exchange between the wireless power transmitter 10 and the wireless power receiver 20 may be used for acquiring synchronization for demodulating the packet and identifying the correct start bit of the packet.
  • the packet receiver may identify the size of the message 930 included in the packet based on the header 920 value.
  • the header 920 may be defined in each step of the wireless power transfer procedure, and in some, the same value may be defined in different steps of the header 920.
  • a 24-bit received power packet transmitted by the wireless power transmitter and a power transmitter capability packet transmitted by the wireless power transmitter correspond to each other.
  • the header value may be equal to 0x31.
  • the message 930 includes data to be transmitted at the transmitting end of the packet.
  • the data included in the message 930 field may be a report, a request, or a response to the counterpart, but is not limited thereto.
  • the packet 900 may further include at least one of a transmitter identification information for identifying a transmitter that transmitted the packet and a receiver identification information for identifying a receiver for receiving the packet.
  • the transmitter identification information and the receiver identification information may include IP address information, MAC address information, product identification information, and the like, but are not limited thereto and may be information capable of distinguishing a receiver and a transmitter from a wireless charging system.
  • the packet 900 may further include predetermined group identification information for identifying the corresponding reception group when the packet is to be received by a plurality of devices.
  • FIG. 10 is a diagram for describing types of packets transmitted from a wireless power receiver to a wireless power transmitter, according to an embodiment.
  • a packet transmitted from a wireless power receiver to a wireless power transmitter includes a signal strength packet for transmitting strength information of a detected ping signal, and power transmission termination for requesting the transmitter to stop power transmission.
  • (End Power Transfer) packet power control hold-off packet for transmitting time information waiting to adjust actual power after receiving control error packet for transmitting power control, transmitting configuration information of receiver Configuration packet for transmission, identification packet for transmitting receiver identification information and extended identification packet, general request packet for transmitting general request message, and special request message for transmission.
  • Special Request packet for sending FOD Status packet for sending reference quality factor values for FO detection
  • a control error packet for controlling the transmission power of the transmitter a renegotiate packet for initiating renegotiation, a 24-bit received power packet for transmitting strength information of received power, and 8 It may include a 8-bit Received Power packet and a Charge Status packet for transmitting the charging status information of the current load.
  • Packets transmitted from the wireless power receiver to the wireless power transmitter may be transmitted using in-band communication using the same frequency band as the frequency band used for wireless power transmission.
  • FIG. 11 illustrates a signal strength packet according to a wireless power transmission procedure according to an embodiment.
  • a message format of a signal strength packet 1101 may be configured as a signal strength value having a size of 1 byte.
  • the signal strength value may indicate a degree of coupling between the transmitting coil and the receiving coil, and is calculated based on the rectifier output voltage in the digital ping period, the open circuit voltage measured by the output disconnect switch, the intensity of the received power, and the like. It may be a value.
  • the signal strength value may range from a minimum of 0 to a maximum of 255, and may have a value of 255 when the actual measured value U for a particular variable is equal to the maximum value Umax of the variable.
  • the signal strength value may be calculated as U / Umax * 256.
  • FIG. 12 is a diagram for describing a power transmission end packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the power transmission end packet 1201 may be configured as an end power transfer code having a size of 1 byte.
  • the reason why the wireless power receiver requests the wireless power transmitter to terminate the power transmission is because of charge completion, internal fault, over temperature, over voltage, over current, and battery. It may include, but is not limited to, Battery Failure, Reconfigure and No Response, and Noise Current. It should be noted that the power transfer abort code may be further defined for each new power transfer termination reason.
  • the charging completion may be used that the charging of the receiver battery is completed.
  • Internal errors can be used when a software or logical error in receiver internal operation is detected.
  • the overheat / overvoltage / overcurrent can be used when the temperature / voltage / current values measured at the receiver exceed the thresholds defined for each.
  • Battery damage can be used if it is determined that a problem has occurred with the receiver battery.
  • Reconfiguration can be used when renegotiation for power transfer conditions is required.
  • No response may be used if it is determined that the transmitter's response to the control error packet, i.e., to increase or decrease the power strength, is not normal.
  • the noise current is a noise generated when switching in the inverter and may be used when the noise current value measured at the receiver exceeds a defined threshold value.
  • FIG. 13 is a diagram for describing a power control suspension packet according to a wireless power transmission procedure according to one embodiment.
  • the message format of the power control hold packet 1301 may include a power control hold time (T_delay; Power Control Hole-Off Time).
  • a plurality of power control hold packets 1301 may be transmitted during the identification and configuration phase. For example, up to seven power control suspension packets 1301 may be transmitted.
  • the power control hold time T_delay may have a value between a predefined power control hold minimum time T_min: 5 ms and a power control hold maximum time T_max: 205 ms.
  • the apparatus for transmitting power wirelessly may perform power control by using the power control holding time of the power control holding packet 1301 last received in the identifying and configuring step.
  • the wireless power transmitter may use the T_min value as the T_delay value when the power control hold packet 1301 is not received in the identification and configuration steps.
  • the power control holding time may refer to a time during which the wireless power transmitter waits without performing power control after receiving the most recent control error packet and before performing the actual power control.
  • FIG. 14 illustrates a configuration packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the configuration packet 1401 may have a length of 5 bytes, and includes a power class field, a maximum power field, a power control field, and zero. ) Field, count field, window size field, window offset field, negotiation field, polarity field, depth field, and the like. .
  • the power class assigned to the wireless power receiver may be recorded in the power class field.
  • the strength value of the maximum power that can be provided by the rectifier output of the wireless power receiver may be recorded.
  • the maximum power Pmax desired to be provided at the rectifier output of the wireless power receiver may be calculated as (b / 2) * 10 ⁇ a.
  • the power control field may be used to indicate according to which algorithm the power control in the wireless power transmitter should be made. For example, if the power control field value is 0, this means that the power control algorithm is defined in the standard, and if the power control field value is 1, it may mean that power control is performed according to an algorithm defined by the manufacturer.
  • the count field may be used to record the number of option configuration packets to be transmitted by the wireless power receiver in the identification and configuration steps.
  • the window size field may be used to record the window size for calculating the average received power.
  • the window size may be a positive integer value greater than 0 and having a unit of 4 ms.
  • the window offset field may record information for identifying the time from the end of the average received power calculation window to the start of the transmission of the next received power packet.
  • the window offset may be a positive integer value greater than 0 and having a unit of 4 ms.
  • the wireless power transmitter sends an ACK response indicating that the wireless power receiver is entering the negotiation phase.
  • the polarity field can determine the polarity of the FSK. For example, a polarity field value of 1 indicates that the wireless power transmitter uses the default FSK polarity. A zero polarity field indicates that the wireless power transmitter uses reverse FSK polarity.
  • the depth field allows you to select the FSK modulation depth.
  • 15 illustrates an identification packet and an extended identification packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the identification packet 1501 includes a version information field, a manufacturer information field, an extension indicator field, and a basic device identification information field. It may be configured to include.
  • revision version information of a standard applied to a corresponding wireless power receiver may be recorded.
  • a predetermined identification code for identifying the manufacturer who manufactured the corresponding wireless power receiver may be recorded.
  • the extension indicator field may be an indicator for identifying whether there is an extension identification packet 1502 including extension device identification information. For example, if the extension indicator value is 0, it may mean that there is no extension identification packet. If the extension indicator value is 1, it may mean that the extension identification packet is present after the identification packet.
  • the device identifier for the corresponding wireless power receiver may be a combination of manufacturer information and basic device identification information.
  • the extended indicator value is 1
  • the device identifier for the corresponding wireless power receiver may be a combination of manufacturer information, basic device identification information and extended device identification information.
  • 16 illustrates a general request packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the general request packet 1601 may include a request field.
  • the request field may be used for the wireless power receiver to request certain information from the wireless power transmitter.
  • the request field may be set to 0x31 to request a power transmitter capability packet of the wireless power transmitter.
  • the general request packet 1601 may be transmitted if a change in the power transmission contract or the power transmission contract is required.
  • the wireless power receiver may transmit a general request packet 1601 for a power transmission contract in a negotiation step.
  • the wireless power transmission apparatus may determine that the power transmission contract needs to be changed in the power transmission step.
  • the wireless power transmitter may transmit the NAK packet in response to the reception of the received power packet.
  • the wireless power receiver receiving the NAK packet may transmit the general request packet 1601 to the wireless power transmitter to perform the renegotiation step.
  • FIG. 17 illustrates a special request packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the special request packet 1701 may include a request field and a request parameter field.
  • the request field may record information about a parameter to be changed.
  • a change value of a parameter designated by the request field may be recorded.
  • the wireless power receiver when a change in count, which is a parameter of a power transmission contract, is required in the negotiation step, the wireless power receiver records 0x00 in the request field and records the change count, that is, the number of counts in the request parameter field. Can be recorded and transmitted.
  • the wireless power receiver may record 0x00 in the request field and transmit it. That is, when the request field is 0x00, not only the count of the power transmission contract is changed but also the negotiation phase or the renegotiation phase may be terminated.
  • the wireless power receiver may record 0x01 in the request field and record and transmit the guaranteed power value in the request parameter field.
  • the wireless power receiver may record 0x02 in the request field and record the header of the 24 bit received power packet in the request parameter field and transmit the packet.
  • FIG. 18 is a diagram illustrating a FOD status packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the FOD status packet 1801 may include a mode field and a reference quality factor value field.
  • the mode field may be used to indicate an operation mode of the wireless power receiver to which the reference quality factor value is applied. For example, if the mode field is '00', the wireless power receiver may be in a power off state.
  • the reference quality factor value field may record the reference quality factor value used to determine a threshold for FO detection in the negotiation phase.
  • 19 illustrates a control error packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the control error packet 1901 may include a control error value field of 1 byte.
  • the control error value field may record a control error value.
  • the control error value may be an integer value ranging from -128 to +127. If the control error value is negative, the power output of the wireless power transmitter may be lowered. If the control error value is negative, the power output of the wireless power transmitter may increase. If the control error value is 0, the transmission power of the wireless power transmitter may not be raised or lowered.
  • a control error packet (CEP) having a control error value of 0 may be referred to as a stable control error packet.
  • control error packet 1901 may be transmitted by the wireless power receiver during the power transmission step.
  • FIG. 20 illustrates a renegotiation packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the renegotiation packet 2001 may include a reserved field preset to an arbitrary value.
  • the reserved field may be set to zero.
  • the renegotiation packet 2001 may be transmitted if a change in the power transmission contract is required in the power transmission phase.
  • the wireless power receiver may determine that the power transmission contract needs to be changed in the power transmission step. In this case, the wireless power receiver may transmit the renegotiation packet 2001 to the wireless power transmitter to perform the renegotiation step.
  • the wireless power transmission apparatus may determine that the power transmission contract needs to be changed in the power transmission step.
  • the wireless power transmitter may transmit the NAK packet in response to the reception of the received power packet.
  • the wireless power receiver receiving the NAK packet may transmit the renegotiation packet 2001 to the wireless power transmitter to perform the renegotiation step.
  • 21 illustrates an 8-bit received power packet according to a wireless power transmission procedure according to an embodiment.
  • a message format of an 8-bit received power packet 2101 may include a received power value field of 1 byte.
  • the reception power value field may record a reception power value.
  • the received power value may correspond to the average rectifier received power value calculated during the predetermined period.
  • Actually received power (Preceived) may be calculated based on the maximum power (Power Class) and the power (Maximum Power) included in the configuration packet. For example, the actual received power may be calculated by (received power value / 128) * (maximum power / 2) * (10 ⁇ power rating).
  • FIG. 22 illustrates a 24-bit received power packet according to a wireless power transmission procedure according to an embodiment.
  • a message format of a 24-bit received power packet 2201 may include a mode field of 1 byte and a received power value field of 2 bytes.
  • the mode field may be used to provide additional information about the received power value.
  • the mode field may be used to request a response of the wireless power transmitter to the reception of the 24-bit received power packet 2291.
  • the wireless power receiver may request a response to the reception of the 24-bit received power packet 2201 from the wireless power transmitter.
  • the wireless power transmitter may transmit a NAK packet or an ACK packet to the wireless power receiver.
  • the wireless power receiver may not request a response to the reception of the 24-bit received power packet 2201 from the wireless power transmitter. In this case, the wireless power transmitter may not transmit the NAK packet or the ACK packet to the wireless power receiver.
  • the reception power value field may record a reception power value.
  • the received power value may correspond to the average rectifier received power value calculated during the predetermined period.
  • Actually received power (Preceived) may be calculated by the wireless power transmission apparatus based on the maximum power (Maximum Power) included in the power transmission contract. As an example, the actual received power Preceived may be calculated by (receive power value / 32768) * (maximum power).
  • FIG. 23 is a diagram for describing a charging state packet according to a wireless power transmission procedure according to an embodiment.
  • the message format of the charge status packet 2301 may include a charge status value field of 1 byte.
  • the charge state value field may record a charge state value.
  • the charge state value may indicate a battery charge of the wireless power receiver.
  • the charge state value 0 may mean a fully discharged state
  • the charge state value 50 may indicate a 50% charge state
  • the charge state value 100 may mean a full state. If the wireless power receiver does not include the rechargeable battery or cannot provide the charging status information, the charging status value may be set to OxFF.
  • FIG. 24 illustrates a packet transmitted from a wireless power transmitter to a wireless power receiver and a power transmitter capability packet according to a wireless power transmission procedure according to an embodiment.
  • a packet 2401 transmitted from a wireless power transmitter to a wireless power receiver may include a power transmitter capability packet 2402 for confirming power that can be transmitted by the transmitter.
  • the packet 2401 transmitted from the wireless power transmitter to the wireless power receiver may be transmitted using in-band communication using the same frequency band as the frequency band used for wireless power transmission.
  • the message format of the power transmitter capability packet 2402 includes a Power Class field, a Guaranteed Power Value field, a Potential Power Value field, a WPID field, and a Not Res sens field. Can be configured.
  • the power rating may be set to '00'.
  • the guaranteed power value may be transmission power that the wireless power transmitter can transmit according to the state. That is, the guaranteed power value may be a variation value that may vary depending on the state of the wireless power transmitter. For example, when multiple transmitters share a single power supply, the energy provided by a single power supply is limited, so the guaranteed power value depends on the number of wireless power receivers that the wireless power transmitter provides power at the same time. Can be.
  • the potential power value may be outgoing power that the wireless power transmitter is designed to deliver. That is, the potential power value may be a unique value determined according to the wireless power transmitter design regardless of the state of the wireless power transmitter. As an example, if multiple transmitters share a single power supply, the potential power value may not depend on the number of wireless power receivers for which the wireless power transmitter provides power at the same time.
  • the power transmitter capability packet 2402 may be transmitted if a change in the power transfer contract or power transfer contract is required.
  • the wireless power transmitter may transmit the power transmitter capability packet 2402 to the wireless power receiver.
  • the wireless power transmitter may transmit the power transmitter capability packet 2402 to the wireless power receiver. More specifically, the wireless power transmitter may enter the renegotiation phase by receiving the renegotiation packet and simultaneously transmit the power transmitter capability packet 2402 to the wireless power receiver. More specifically, the apparatus for transmitting power wirelessly may need to change a power transmission contract according to the power state of the apparatus for transmitting power wirelessly and thus may proceed with the renegotiation step. In this case, when the wireless power transmitter receives the renegotiation packet, the wireless power transmitter may transmit the power transmitter capability packet 2402 to the wireless power receiver even without receiving the general request packet requesting the power transmitter capability packet 2402.
  • 25 is a diagram for describing a wireless charging method on a wireless charging system, according to an exemplary embodiment.
  • FIG. 25 is a flowchart illustrating a wireless charging method when the negotiation step is performed on the wireless charging system and the wireless charging method until the renegotiation step or the renegotiation step is unnecessary.
  • the wireless power transmitter 2510 may transmit an analog ping to the wireless power receiver 2520.
  • the wireless power transmitter 2510 may transition from the selection step to the ping step when the object is detected.
  • the wireless power transmitter 2510 activates the wireless power receiver 2520, and may transmit a digital ping for identifying whether the receiver is a wireless power receiver 2520 that is compatible with the WPC standard (S2502).
  • the wireless power receiver 2520 may transmit a signal strength packet in response to the digital ping (S2503).
  • the wireless power receiver 2520 may transmit an identification packet for notifying the identification information and a configuration packet for notifying the configuration information (S2504 and S2505).
  • the wireless power transmitter 2510 and the wireless power receiver 2520 may transition to the negotiation step if the negotiation field value of the configuration packet is a value indicating to perform the negotiation step.
  • the wireless power receiver 2520 may transmit a FOD status packet for FO detection (S2506).
  • the wireless power receiver 2520 may transmit a general request packet requesting a power transmitter capability packet for a power transmission contract (S2507).
  • the wireless power transmitter 2520 may transmit the power transmitter capability packet in response to the general request packet (S2508).
  • the wireless power receiver 2520 may transmit a special request packet for proposing a guaranteed power value of the power transmission contract based on the guaranteed power value of the power transmitter capability packet (S2507).
  • the wireless power receiver 2520 may propose a guaranteed power value of the power transfer agreement with a value equal to or less than the guaranteed power value of the power transmitter capability packet.
  • the wireless power transmitter 2510 may transmit an ACK packet in response to the special request packet for proposing a guaranteed power value of the power transmission contract (S2510).
  • the wireless power transmitter 2510 accepts a guaranteed power value of a power transmission contract proposed by the wireless power receiver.
  • the wireless power receiver 2520 may transmit a special request packet for terminating the negotiation step (S2511).
  • the wireless power transmitter 2510 may transmit an ACK packet in response to the special request packet for terminating the negotiation step (S2512). That is, the wireless power transmitter 2510 may transmit an ACK packet with acceptance of the end of the negotiation step.
  • the wireless power receiver 2520 may transmit a received power packet to the wireless power transmitter 2510 in order to predict power loss (S2513).
  • the received power packet may be an 8-bit received power packet or a 24-bit received power packet.
  • the wireless power transmitter 2510 may transmit an ACK packet in response to the received power packet (not shown).
  • the wireless power receiver 2520 may transmit one or more control error packets to control the transmission power of the wireless power transmitter 2510 (S2514).
  • the wireless power receiver 2520 may transmit the received power packet periodically or arbitrarily (S2516).
  • the received power packet may be a 24-bit received power packet.
  • the wireless power transmitter 2510 may transmit an ACK packet in response to the received power packet (S2516).
  • FIG. 26 illustrates a wireless charging method including a renegotiation step on a wireless charging system according to another embodiment.
  • FIG. 26 is a flowchart illustrating a wireless charging method of performing a renegotiation step on a wireless charging system.
  • the wireless charging system according to another embodiment may be the same as the selection step or correction step in the wireless charging method of the wireless charging system of FIG.
  • the wireless power receiver 2620 may periodically or arbitrarily transmit a received power packet (S2601).
  • the received power packet may be a 24-bit received power packet.
  • the wireless power transmitter 2610 may determine that the power transmission contract needs to be changed, and may transmit a NAK packet in response to the reception of the received power packet (S2602).
  • the wireless power transmitter 2610 may have a power state different from that of the negotiation stage. That is, the guaranteed power value that can be sent by the wireless power transmitter 2610 can be changed after the negotiation phase.
  • the wireless charging system may perform a renegotiation step with NAK packet transmission in response to the reception of the received power packet of the wireless power transmitter 2610.
  • the wireless power transmitter 2610 may need to change the power transmission contract.
  • the NAK packet may be transmitted in response to the reception of the received power packet. If the transmittable guaranteed power value of the modified wireless power transmitter is greater than the guaranteed power value of the power transmission contract, the wireless power transmitter 2610 determines that no change in the power transmission contract is necessary and responds to the reception of the received power packet.
  • ACK packet can be transmitted.
  • the wireless power transmitter 2610 may transmit a NAK packet to reduce a heating amount or an electromagnetic radiation amount. Thereafter, the wireless power receiver 2620 may transmit a general request packet requesting a power transmitter capability packet (S2603).
  • the wireless power transmitter 2620 may transmit a power transmitter capability packet in response to the general request packet (S2604).
  • the wireless power receiver 2620 may transmit a special request packet for proposing a guaranteed power value of the power transmission contract based on the changed guaranteed power value of the power transmitter capability packet (S2605).
  • the wireless power receiver 2620 may propose a guaranteed power value of the power transfer agreement to a value equal to or less than the guaranteed power value of the power transmitter capability packet.
  • the wireless power transmitter 2610 may transmit an ACK packet in response to the special request packet for proposing a guaranteed power value of the power transmission contract (S2606). That is, the wireless power transmitter 2610 is a case where the wireless power receiver 2620 accepts the guaranteed power value of the power transmission contract proposed.
  • the wireless power receiver 2620 may transmit a special request packet for ending the renegotiation step (S2607).
  • the wireless power transmitter 2610 may transmit an ACK packet in response to the special request packet for ending the renegotiation step (S2608). That is, the wireless power transmitter 2610 may send an ACK packet with acceptance of the end of the renegotiation phase.
  • the wireless power receiver 2620 may resume the power transmission step by transmitting a control error packet (S2609).
  • another embodiment may control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmission apparatus may control the charging power.
  • another embodiment may control the charging power to reduce heat generation of the wireless power transmission apparatus.
  • another embodiment may control the charging power to reduce the electromagnetic emission of the wireless power transmission device.
  • another embodiment may reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • FIG. 27 is a diagram for describing a wireless charging method including a renegotiation step on a wireless charging system according to another embodiment.
  • FIG. 27 is a flowchart illustrating a wireless charging method of performing a renegotiation step on a wireless charging system.
  • the wireless charging system according to another embodiment may be the same as the selection step, identification and configuration step in the wireless charging method of the wireless charging system of FIG.
  • the wireless power receiver 2720 may transmit a FOD status packet for FO detection (S2701).
  • the wireless power receiver 2720 may transmit a general request packet requesting a power transmitter capability packet for a power transmission contract (S2702).
  • the wireless power transmitter 2720 may transmit the power transmitter capability packet in response to the general request packet (S2703).
  • the wireless power receiver 2720 may transmit a special request packet for proposing a guaranteed power value of the power transmission contract based on the guaranteed power value of the power transmitter capability packet (S2704).
  • the wireless power receiver 2720 may suggest a guaranteed power value of the power transfer agreement with a value greater than the guaranteed power value of the power transmitter capability packet.
  • the wireless power transmitter 2710 may transmit a NAK packet in response to the special request packet for proposing a guaranteed power value of the power transmission contract (S2705). That is, the wireless power transmitter 2710 rejects the guaranteed power value of the power transmission contract proposed by the wireless power receiver 2720. In this case, the guaranteed power value may be determined to be lower than the guaranteed power value of the power transmission contract proposed in S2704. For example, if the wireless power transmitter 2710 transmits a NAK packet in step S2705, the power transmission contract may be set to a default value. As another example, the wireless power receiver 2720 may change the guaranteed power value of the power transfer agreement until the wireless power transmitter 2710 sends an ACK packet and resend the special request packet (not shown).
  • the wireless power receiver 2720 may transmit a special request packet for terminating the negotiation step (S2706).
  • the wireless power transmitter 2710 may transmit an ACK packet in response to the special request packet for terminating the negotiation step (S2707). That is, the wireless power transmitter 2710 may transmit an ACK packet with acceptance of the end of the negotiation step.
  • the wireless power receiver 2720 may transmit a received power packet to the wireless power transmitter 2710 to predict power loss (S2708).
  • the received power packet may be an 8-bit received power packet or a 24-bit received power packet.
  • the wireless power transmitter 2710 may transmit an ACK packet in response to the received power packet (not shown).
  • the wireless power receiver 2720 may transmit one or more control error packets to control the transmission power of the wireless power transmitter 2710 (S2709).
  • the wireless power receiver 2720 may transmit the received power packet periodically or arbitrarily (S2710).
  • the received power packet may be a 24-bit received power packet.
  • the wireless power transmitter 2710 may determine that the power transmission contract needs to be changed, and may transmit a NAK packet in response to the reception of the received power packet (S2711).
  • the wireless power transmitter 2710 may have a power state different from that of the negotiation stage. That is, the guaranteed power value that can be transmitted by the wireless power transmitter 2710 may be changed after the negotiation step.
  • the wireless charging system may perform the renegotiation step by transmitting the NAK packet in response to the reception of the received power packet of the wireless power transmitter 2710. For example, if the transmittable guaranteed power value of the wireless power transmitter 2710 is changed to transmit power at a value greater than the guaranteed power value of the power transmission contract, the wireless power transmitter 2710 may transmit a power transmission contract.
  • the NAK packet may be transmitted in response to the reception of the received power packet by determining that a change is required.
  • the wireless power transmitter 2710 may transmit a NAK packet to reduce a heating amount or an electromagnetic radiation amount.
  • the wireless power receiver 2720 may transmit a general request packet requesting a power transmitter capability packet (S2712).
  • the wireless power transmitter 2720 may transmit the power transmitter capability packet in response to the general request packet (S2713).
  • the wireless power receiver 2720 may send a special request packet for proposing a guaranteed power value of the power transmission contract based on the changed guaranteed power value of the power transmitter capability packet (S2714). For example, the wireless power receiver 2720 may propose a guaranteed power value of the power transfer agreement with a value equal to or less than the guaranteed power value of the power transmitter capability packet.
  • the wireless power transmitter 2710 may transmit an ACK packet in response to the special request packet for proposing a guaranteed power value of the power transmission contract (S2715). That is, the wireless power transmitter 2710 accepts the guaranteed power value of the power transmission contract proposed by the wireless power receiver 2720.
  • the wireless power receiver 2720 may transmit a special request packet for terminating the renegotiation step (S2716).
  • the wireless power transmitter 2710 may transmit an ACK packet in response to the special request packet for terminating the renegotiation step (S2717). That is, the wireless power transmitter 2710 may send an ACK packet with acceptance of the end of the renegotiation phase.
  • the wireless power receiver 2720 may proceed with the power transmission step again by transmitting a control error packet (S2718).
  • another embodiment may control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmission apparatus may control the charging power.
  • another embodiment may control the charging power to reduce heat generation of the wireless power transmission apparatus.
  • another embodiment may control the charging power to reduce the electromagnetic emission of the wireless power transmission device.
  • another embodiment may minimize the charging time by increasing the strength of the charging power.
  • another embodiment may reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • FIG. 28 is a diagram for describing a wireless charging method in a wireless power transmitter, according to an embodiment.
  • the wireless charging method in the wireless power transmitter may be a wireless charging method for the wireless power transmitter on the wireless charging system of FIGS. 25, 26, and 27.
  • the wireless power transmitter may transmit power with a guaranteed power value according to a power transmission contract in operation S2801.
  • the wireless power transmitter may collect transmitter state information (S2802).
  • the transmitter state information may include a guaranteed power value that the wireless power transmitter can transmit, a potential power value that the wireless power transmitter is designed to transmit, and the like.
  • the transmitter status information may be information recorded in a power transmitter capability packet.
  • the wireless power transmitter may determine whether a transition is necessary in the renegotiation step based on the collected transmitter state information (S2803 and S2804). More specifically, the case where the renegotiation step is required is when the wireless power transmitter wants to change the power transmission contract. For example, the wireless power transmitter may attempt to perform a renegotiation step for changing a power state that can be transmitted, reducing heat generation, and reducing electromagnetic waves.
  • the wireless power transmitter may transmit the NAK packet in response to the received power packet and then transition to the renegotiation step (S2805).
  • the received power packet may be a 24-bit receive power packet.
  • the wireless power transmitter may transmit the power transmitter capability packet after receiving the general request packet for the power transmitter capability packet request (S2806). More specifically, the wireless power transmitter may transmit the power transmitter capability packet in response to receiving the general request packet (the power transmitter capability packet request, ie, the request field is set to 0x31).
  • the wireless power transmitter may transmit an ACK packet after receiving the special request packet proposing a guaranteed power value of the power transmission contract (S2807).
  • the wireless power transmitter may transmit a guaranteed power value (guaranteed power value of a special request packet) required by the wireless power receiver before accepting the power transmission contract.
  • the wireless power transmitter may transmit an ACK packet after receiving the special request packet for terminating the renegotiation step (S2808).
  • the wireless power transmitter may transition to the power transmission step of S2801 after modifying the guaranteed power value of the power transmission contract (S2809).
  • the wireless power transmitter may transmit an ACK packet in response to the received power packet and then transition to the power transmission step of S2801 (S2810).
  • one embodiment may control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmitter may control the charging power.
  • one embodiment may control the charging power to reduce heat generation of the wireless power transmission apparatus.
  • one embodiment may control the charging power to reduce the electromagnetic emission of the wireless power transmission apparatus.
  • an embodiment may minimize the charging time by increasing the strength of the charging power.
  • one embodiment may reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • 29 is a diagram for describing a wireless charging method in a wireless power receiver, according to an embodiment.
  • the wireless charging method in the wireless power receiver may be a wireless charging method for the wireless power receiver on the wireless charging system of FIGS. 25, 26, and 27.
  • the wireless power receiver may transmit a received power packet.
  • the received power packet may be a 24-bit receive power packet.
  • the wireless power receiver may transmit a general request packet to transition to the renegotiation step (S2902). More specifically, when the wireless power receiver receives the NAK packet in response to the transmission of the received power packet, the wireless power receiver may transmit a general request packet (a power transmitter capability packet request, that is, the request field is set to 0x31).
  • a general request packet a power transmitter capability packet request, that is, the request field is set to 0x31.
  • the wireless power receiver may receive a power transmitter capability packet (S2903).
  • the wireless power receiver may determine whether to transition from the renegotiation step to the power transmission step (S2904). More specifically, there may be a case where the transition from the renegotiation step to the power transfer step occurs. For example, the wireless power transmitter may transmit a guaranteed power value (a guaranteed power value of a special request packet) required by the wireless power receiver before accepting the power transmission contract. There may be a case where the transition from the renegotiation phase to the power transfer phase does not occur. For example, the charging of the wireless power receiver is completed. In addition, it may be necessary to receive a certain level of power due to system stability of the electronic device connected to the wireless power receiver. In this case, the guaranteed power value required by the wireless power receiver (guaranteed power value of the special request packet) is larger than the guaranteed power value (guaranteed power value of the power transmitter capability packet) that the wireless power transmitter can send.
  • a guaranteed power value a guaranteed power value of a special request packet
  • the wireless power receiver may transmit a special request packet for proposing a guaranteed power value of the power transmission contract (S2905).
  • the guaranteed power value of the special request packet may be less than the guaranteed power value of the power transmitter capability packet.
  • the wireless power receiver may receive an ACK packet in response to a special request packet for proposing a guaranteed power value of the power transmission contract to complete the power transmission contract (S2906).
  • the wireless power receiver may transmit a special request packet for ending the renegotiation step (S2907).
  • the wireless power receiver may transition to the power transmission step and transmit a control error packet (S2908).
  • the wireless power receiver may terminate power reception (S2909).
  • one embodiment may control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmitter may control the charging power.
  • one embodiment may control the charging power to reduce heat generation of the wireless power transmission apparatus.
  • one embodiment may control the charging power to reduce the electromagnetic emission of the wireless power transmission apparatus.
  • an embodiment may minimize the charging time by increasing the strength of the charging power.
  • one embodiment may reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • FIG. 30 is a diagram for describing a wireless charging method including a renegotiation step on a wireless charging system according to another embodiment.
  • FIG. 30 is a flowchart illustrating a wireless charging method of performing a renegotiation step on a wireless charging system.
  • the wireless charging system according to another embodiment may be the same as the selection step or correction step in the wireless charging method of the wireless charging system of FIG.
  • the wireless power receiver 3020 may periodically or arbitrarily transmit a received power packet (S3001).
  • the received power packet may be a 24-bit received power packet.
  • the wireless power transmitter 3010 determines that the power transmission contract needs to be changed, and may transmit a NAK packet in response to the reception of the received power packet (S3002). More specifically, the wireless power transmitter 3010 may have a power state different from that of the negotiation stage. That is, the guaranteed power value that can be sent by the wireless power transmitter 3010 may be changed after the negotiation step.
  • the wireless charging system may perform the renegotiation step by transmitting the NAK packet in response to the reception of the received power packet of the wireless power transmitter 3010.
  • the wireless power transmitter 3010 needs to change the power transmission contract.
  • the NAK packet may be transmitted in response to the reception of the received power packet. If the transmittable guaranteed power value of the modified wireless power transmitter is greater than the guaranteed power value of the power transmission contract, the wireless power transmitter 3010 determines that no change in the power transmission contract is necessary and responds to the reception of the received power packet. ACK packet can be transmitted.
  • the wireless power transmitter 3010 may transmit a NAK packet to reduce the heating value or the electromagnetic radiation amount. Thereafter, the wireless power receiver 3020 may transmit a renegotiation packet (S3003).
  • the wireless power transmitter 3020 may transmit a power transmitter capability packet in response to the renegotiation packet (S3004).
  • the wireless power receiver 3020 may transmit a special request packet for proposing a guaranteed power value of the power transmission contract based on the changed guaranteed power value of the power transmitter capability packet (S3005).
  • the wireless power receiver 3020 may propose a guaranteed power value of the power transfer agreement to a value equal to or less than the guaranteed power value of the power transmitter capability packet.
  • the wireless power transmitter 3010 may transmit an ACK packet in response to the special request packet for proposing a guaranteed power value of the power transmission contract (S3006). That is, the wireless power transmitter 3010 accepts a guaranteed power value of the power transmission contract proposed by the wireless power receiver 3020.
  • the wireless power receiver 3020 may transmit a special request packet for terminating the renegotiation step (S3007).
  • the wireless power transmitter 3010 may transmit an ACK packet in response to the special request packet for terminating the renegotiation step (S3008). That is, the wireless power transmitter 3010 may transmit an ACK packet with acceptance of the end of the renegotiation step.
  • the wireless power receiver 3020 may resume the power transmission step by transmitting a control error packet (S3009).
  • another embodiment may control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmission apparatus may control the charging power.
  • another embodiment may control the charging power to reduce heat generation of the wireless power transmission apparatus.
  • another embodiment may control the charging power to reduce the electromagnetic emission of the wireless power transmission device. Further, another embodiment may reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • FIG. 31 illustrates a wireless charging method including a renegotiation step on a wireless charging system according to another embodiment.
  • FIG. 31 is a flowchart illustrating a wireless charging method of performing a renegotiation step on a wireless charging system.
  • the wireless charging system according to another embodiment may be the same as the selection step, identification and configuration step in the wireless charging method of the wireless charging system of FIG.
  • the wireless power receiver 3120 may transmit a FOD status packet for FO detection (S3101).
  • the wireless power receiver 3120 may transmit a general request packet requesting a power transmitter capability packet for a power transmission contract (S3102).
  • the wireless power transmitter 3120 may transmit a power transmitter capability packet in response to the general request packet (S3103).
  • the wireless power receiver 3120 may transmit a special request packet for proposing a guaranteed power value of the power transmission contract based on the guaranteed power value of the power transmitter capability packet (S3104).
  • the wireless power receiver 3120 may suggest a guaranteed power value of the power transfer agreement with a value greater than the guaranteed power value of the power transmitter capability packet.
  • the wireless power transmitter 3110 may transmit a NAK packet in response to a special request packet for proposing a guaranteed power value of the power transmission contract (S3105). That is, the wireless power transmitter 3110 rejects the guaranteed power value of the power transmission contract proposed by the wireless power receiver 3120. In this case, the guaranteed power value may be determined to be lower than the guaranteed power value of the power transmission contract proposed in S3104. For example, if the wireless power transmitter 3110 transmits a NAK packet in step S3105, the power transmission contract may be set to a default value. As another example, the wireless power receiver 3120 may change the guaranteed power value of the power transmission contract until the wireless power transmitter 3110 sends an ACK packet and transmit the special request packet again (not shown).
  • the wireless power receiver 3120 may transmit a special request packet for terminating the negotiation step (S3106).
  • the wireless power transmitter 3110 may transmit an ACK packet in response to the special request packet for terminating the negotiation step (S3107). That is, the wireless power transmitter 3110 may transmit an ACK packet with acceptance of the end of the negotiation step.
  • the wireless power receiver 3120 may transmit a received power packet to the wireless power transmitter 3110 to predict power loss (S3108).
  • the received power packet may be an 8-bit received power packet or a 24-bit received power packet.
  • the wireless power transmitter 3110 may transmit an ACK packet in response to the received power packet (not shown).
  • the wireless power receiver 3120 may transmit one or more control error packets to control the transmission power of the wireless power transmitter 3110 (S3109).
  • the wireless power receiver 3120 may periodically or arbitrarily transmit a received power packet (S3110).
  • the received power packet may be a 24-bit received power packet.
  • the wireless power transmitter 3110 may determine that the power transmission contract needs to be changed and may transmit a NAK packet in response to the reception of the received power packet (S3111).
  • the wireless power transmitter 3110 may have a power state different from that of the negotiation stage. That is, the guaranteed power value that can be transmitted by the wireless power transmitter 3110 may be changed after the negotiation step.
  • the wireless charging system may perform the renegotiation step by transmitting the NAK packet in response to the reception of the received power packet of the wireless power transmitter 3110. More specifically, when the transmittable guaranteed power value of the wireless power transmitter 3110 is changed to transmit power with a value greater than the guaranteed power value of the power transmission contract, the wireless power transmitter 3110 may transmit a power transmission contract. The NAK packet may be transmitted in response to the reception of the received power packet by determining that a change is required. As another example, the wireless power transmitter 3110 may transmit a NAK packet to reduce a heating amount or an electromagnetic radiation amount. Thereafter, the wireless power receiver 3120 may transmit a renegotiation packet (S3112).
  • S3112 renegotiation packet
  • the wireless power transmitter 3120 may transmit a power transmitter capability packet in response to the renegotiation packet (S3113).
  • the wireless power receiver 3120 may transmit a special request packet for proposing a guaranteed power value of the power transmission contract based on the changed guaranteed power value of the power transmitter capability packet (S3114). For example, the wireless power receiver 3120 may suggest a guaranteed power value of the power transfer agreement with a value equal to or less than the guaranteed power value of the power transmitter capability packet.
  • the wireless power transmitter 3110 may transmit an ACK packet in response to the special request packet for proposing a guaranteed power value of the power transmission contract (S3115). That is, the wireless power transmitter 3110 accepts the guaranteed power value of the power transmission contract proposed by the wireless power receiver 3120.
  • the wireless power receiver 3120 may transmit a special request packet for terminating the renegotiation step (S3116).
  • the wireless power transmitter 3110 may transmit an ACK packet in response to the special request packet for terminating the renegotiation step (S3117). That is, the wireless power transmitter 3110 may transmit an ACK packet with acceptance of the end of the renegotiation step.
  • the wireless power receiver 3120 may resume the power transmission step by transmitting a control error packet (S3118).
  • another embodiment may control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmission apparatus may control the charging power.
  • another embodiment may control the charging power to reduce heat generation of the wireless power transmission apparatus.
  • another embodiment may control the charging power to reduce the electromagnetic emission of the wireless power transmission device.
  • another embodiment may minimize the charging time by increasing the strength of the charging power.
  • another embodiment may reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • 32 is a diagram for describing a wireless charging method of a wireless power transmitter according to another embodiment.
  • the wireless charging method in the wireless power transmitter may be a wireless charging method for the wireless power transmitter on the wireless charging system of FIGS. 25, 30, and 31.
  • the wireless power transmitter may transmit power with a guaranteed power value according to a power transmission contract in operation S3201.
  • the wireless power transmitter may collect transmitter state information (S3202).
  • the transmitter state information may include a guaranteed power value that the wireless power transmitter can transmit, a potential power value that the wireless power transmitter is designed to transmit, and the like.
  • the transmitter status information may be information recorded in a power transmitter capability packet.
  • the wireless power transmitter may determine whether a transition is necessary in the renegotiation step based on the collected transmitter state information (S3203 and S3204). More specifically, the case where the renegotiation step is required is when the wireless power transmitter wants to change the power transmission contract. For example, the wireless power transmitter may attempt to perform a renegotiation step for changing a power state that can be transmitted, reducing heat generation, and reducing electromagnetic waves.
  • the wireless power transmitter may transmit the NAK packet in response to the received power packet and then transition to the renegotiation step (S3205).
  • the received power packet may be a 24-bit receive power packet.
  • the wireless power transmitter may transmit a power transmitter capability packet after receiving the renegotiation packet (S3206). More specifically, the wireless power transmitter may transmit the power transmitter capability packet in response to receiving the renegotiation packet.
  • the wireless power transmitter may transmit an ACK packet after receiving a special request packet suggesting a guaranteed power value of the power transmission contract (S3207).
  • the wireless power transmitter may transmit a guaranteed power value (guaranteed power value of a special request packet) required by the wireless power receiver before accepting the power transmission contract.
  • the wireless power transmitter may transmit an ACK packet after receiving the special request packet for ending the renegotiation step (S3208).
  • the wireless power transmitter may transition to the power transmission step of S2801 after modifying the guaranteed power value of the power transmission contract (S3209).
  • the wireless power transmitter may transition to the power transmission step of S2801 by transmitting an ACK packet in response after receiving the received power packet (S3210).
  • another embodiment may control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmission apparatus may control the charging power.
  • another embodiment may control the charging power to reduce heat generation of the wireless power transmission apparatus.
  • another embodiment may control the charging power to reduce the electromagnetic emission of the wireless power transmission device.
  • another embodiment may minimize the charging time by increasing the strength of the charging power.
  • another embodiment may reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • 33 is a view for explaining a wireless charging method in a wireless power receiver according to another embodiment.
  • the wireless charging method in the wireless power receiver may be a wireless charging method for the wireless power receiver on the wireless charging system of FIGS. 25, 30, and 31.
  • the wireless power receiver may transmit a received power packet (S3301).
  • the received power packet may be a 24-bit receive power packet.
  • the wireless power receiver may transmit a renegotiation packet to transition to a renegotiation step (S3302). More specifically, the wireless power receiver may transmit the renegotiation packet when receiving the NAK packet in response to the transmission of the received power packet.
  • the wireless power receiver may receive a power transmitter capability packet (S3303).
  • the wireless power receiver may determine whether to transition from the renegotiation step to the power transmission step (S3304). More specifically, there may be a case where the transition from the renegotiation step to the power transfer step occurs. For example, the wireless power transmitter may transmit a guaranteed power value (a guaranteed power value of a special request packet) required by the wireless power receiver before accepting the power transmission contract. There may be a case where the transition from the renegotiation phase to the power transfer phase does not occur. For example, the charging of the wireless power receiver is completed. In addition, it may be necessary to receive a certain level of power due to system stability of the electronic device connected to the wireless power receiver. In this case, the guaranteed power value required by the wireless power receiver (guaranteed power value of the special request packet) is larger than the guaranteed power value (guaranteed power value of the power transmitter capability packet) that the wireless power transmitter can send.
  • a guaranteed power value a guaranteed power value of a special request packet
  • the wireless power receiver may transmit a special request packet for proposing a guaranteed power value of the power transmission contract (S3305).
  • the guaranteed power value of the special request packet may be less than the guaranteed power value of the power transmitter capability packet.
  • the wireless power receiver may receive an ACK packet in response to a special request packet for proposing a guaranteed power value of the power transmission contract to complete the power transmission contract (S3306).
  • the wireless power receiver may transmit a special request packet for ending the renegotiation step (S3307).
  • the wireless power receiver may transition to the power transmission step and transmit a control error packet (S3308).
  • the wireless power receiver may end the power reception (S3309).
  • another embodiment may control the charging power according to the state of the wireless power transmission apparatus.
  • the wireless power transmission apparatus may control the charging power.
  • another embodiment may control the charging power to reduce heat generation of the wireless power transmission apparatus.
  • another embodiment may control the charging power to reduce the electromagnetic emission of the wireless power transmission device.
  • another embodiment may minimize the charging time by increasing the strength of the charging power.
  • another embodiment may reduce the number of packets exchanged between the wireless power transmitter and the wireless power receiver to perform the renegotiation step, thereby minimizing the renegotiation step time.
  • 34 is a diagram illustrating a renegotiation step time in a wireless charging method, according to an embodiment.
  • the first time T1 may be a time at which the wireless power transmitter receives a received power packet and delivers a NAK packet to the wireless power receiver.
  • the first time T1 may be about 250 ms.
  • the second time T2 may be the time it takes for the wireless power receiver to transmit the generic request packet.
  • the second time T2 may be 22 ms.
  • the third time T3 may be a time at which the wireless power transmitter receives the general request packet and forwards the power transmitter capability packet to the wireless power receiver.
  • the third time T3 may be about 250 ms.
  • the fourth time T4 may be a time taken for the wireless power receiver to transmit the first or second special request packet.
  • the first special request packet may be a special request packet that proposes a guaranteed power value of a power transmission contract.
  • the second special request packet may be a special request packet for ending the renegotiation step.
  • the fourth time T4 may be about 27.5 ms.
  • the fifth time T5 may be a time at which the wireless power transmitter receives the first special request packet and forwards the ACK packet to the wireless power receiver.
  • the fifth time T5 may be about 250 ms.
  • the sixth time T6 may be a time taken for the wireless power transmitter to receive the second special request packet and transmit the ACK packet.
  • the sixth time T6 may be 10 ms.
  • the T renegotiation may be 877 ms.
  • 35 is a diagram for describing a wireless charging transmission coil, according to an exemplary embodiment.
  • three transmitting coils may be disposed.
  • at least one of the plurality of transmitting coils may be overlapped.
  • the first coil 4010 and the second coil 4020 are disposed side by side on the shielding material 4040 at the first layer, and the third coil 4030 is disposed on the first coil and the second coil. It may be disposed overlapping the second layer.
  • the first coil 4010, the second coil 4020, and the third coil 4030 may be manufactured according to the specifications of the coils defined in the WPC or PMA, and the same within the extent to which the respective physical characteristics are acceptable. can do.
  • the transmitting coil may have a specification as shown in Table 1 below.
  • Table 1 is a specification for the A13 type transmission coil defined in the WPC, and in one embodiment, the first coil 4010, the second coil 4020, and the third coil 4030 have an outer length defined in Table 1, It can be made with inner length, outer width, inner width, thickness and number of turns. Of course, the first coil 4010, the second coil 4020, and the third coil 4030 may have the same physical characteristics within an error range by the same manufacturing process.
  • each of the first coil 4010, the second coil 4020, and the third coil 4030 may have a different inductance value according to a position disposed in a relationship with the shielding material.
  • the first coil 4010 and the second coil 4020 satisfy the specifications of Table 1 and have an inductance of 12.5 uH
  • the third coil 4030 has a first coil having a separation distance from the shielding material. Unlike the 4010 and the second coil 4020, it may have an inductance smaller than 12.5 uH.
  • the first coil 4010 and the second coil 4020 are disposed in contact with the shielding material, but the third coil 4030 may be spaced apart from the shielding material by a predetermined height.
  • an adhesive may be disposed between the first coil 4010, the second coil 4020, or the third coil 4030 and the shielding material.
  • the third coil 4030 has a number of turns more than the number of turns of the first coil 4010 and the second coil 4020 to have the same inductance as the first coil 4010 and the second coil 4020. (E.g., 0.5 or 1 or 2 times) can be made to have more turns.
  • the third coil 4030 may have a number of turns of 12.5 or 13 or 14 times.
  • the centrally located third coil 4030 is located farther from the shielding material than the first coil 4010 and the second coil 4020 so that the measured inductance is measured in the first coil 4010 and the second coil 4020.
  • the length of the conducting wire constituting the third coil 4030 may be slightly longer than that of the first coil 4010 and the second coil 4020 to equally adjust the inductance.
  • the length of the conductive wire constituting the third coil 4030 is slightly longer than that of the first coil 4010 and the second coil 4020, so that the third coil 4030 may be the first coil 4030. And despite being located farther from the shield than the second coil 4020, the inductance of the three coils may be equal to 12.5 uH. In one embodiment, the same inductance of the coil means that it has an error range within ⁇ 0.5 uH.
  • the overlapping transmission coils may have a smaller inductance measured as the distance from the shield is farther away, and the length of the transmission coil may be longer to increase the inductance as the distance from the shield is farther away.
  • 36 is a diagram for describing three drive circuits including a full-bridge inverter in a wireless power transmitter including a plurality of coils, according to an exemplary embodiment.
  • each of the three coils included in the wireless power transmitter has different inductances
  • three coils including a capacitor for generating the same resonant frequency as the three drive circuits 4110 connected to each coil are included.
  • LC resonant circuit 4120 is required.
  • the resonant frequency generated by the wireless power transmitter to perform power transmission cannot be different for each of the transmitting coils, and should be in accordance with the standard resonant frequency supported by the wireless power transmitter.
  • the resonant frequency generated by the LC resonant circuit 4120 may vary according to the inductance of the coil and the capacitance of the capacitor.
  • the resonant frequency (fr, resonant frequency) may be 100Khz, and the capacitance of the capacitor connected to the coil to generate the resonance frequency is 200nF, to use only one capacitor, all three coils are 12.5. uH must be satisfied. If the inductances of the three coils are different from each other, three capacitors having different capacitances are required to generate a resonance frequency of 100 kHz. In addition, three drive circuits 4110 including an inverter for applying an alternating voltage in each LC resonant circuit 4120 are also required.
  • FIG. 37 is a diagram for describing a wireless power transmitter including a plurality of coils and a single drive circuit, according to an exemplary embodiment.
  • the wireless power transmitter may include only one drive circuit 4210, and the wireless power receiver among one drive circuit 4210 and three coils.
  • the switch 4230 may be controlled to connect the coil of the wireless power transmitter with the coil having the highest power transmission efficiency.
  • the wireless power transmitter can reduce the area occupied by the component by using only one drive circuit 4210, thereby miniaturizing the wireless power transmitter itself, and reducing raw material costs required for manufacturing. .
  • the wireless power transmitter may use the signal strength indicator in the ping step to calculate the power transfer efficiency between the three coils of the wireless power transmitter and the coil of the wireless power receiver.
  • the wireless power transmitter may select a coil of the wireless power transmitter having a high coupling coefficient by calculating a coupling coefficient between the transmission and reception coils.
  • the wireless power transmitter may control the switch 4230 to calculate a factor (Q factor) to identify a coil of the wireless power transmitter having a high factor and to connect with the drive circuit 4210.
  • Q factor a factor
  • 38 is a diagram for describing a plurality of switches connecting one of a plurality of transmission coils to a drive circuit according to an exemplary embodiment.
  • a power transmitter includes a drive circuit 4310 for converting an input voltage, a switch 4320 for connecting the drive circuit 4310 and an LC resonant circuit, a plurality of transmission coils 4330, and a plurality of wireless power transmitters.
  • One capacitor 4340 connected in series with the coil of the control unit 4320 may include a control unit 4350 to control the opening and closing.
  • the controller 4350 identifies a coil of the wireless power receiver and a coil of the wireless power transmitter having the highest power transmission efficiency among the plurality of coils 4330 of the wireless power transmitter, and drives the coil of the identified wireless power transmitter in the drive circuit 4310. Control to close the switch to connect the
  • the method according to the embodiment described above may be stored in a computer-readable recording medium that is produced as a program for execution on a computer, and examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape , Floppy disks, optical data storage, and the like, and also include those implemented in the form of carrier waves (eg, transmission over the Internet).
  • the computer readable recording medium can be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.
  • functional programs, codes, and code segments for implementing the above-described method may be easily inferred by programmers in the art to which the embodiments belong.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne une technologie de transmission d'énergie sans fil et, plus particulièrement, un procédé de charge sans fil, ainsi qu'un appareil et un système associés. Selon un mode de réalisation, un émetteur d'énergie sans fil peut comprendre : une unité de transmission d'énergie qui comprend au moins une bobine d'émission; une unité de conversion d'énergie qui convertit l'intensité d'énergie en courant continu appliquée depuis l'extérieur; une unité de communication qui échange des informations avec un dispositif externe; une unité de commande qui transmet un paquet prédéterminé par l'intermédiaire de l'unité de communication de façon à modifier un contrat de transmission d'énergie.
PCT/KR2017/015413 2016-12-26 2017-12-22 Procédé de charge sans fil et appareil et système associés Ceased WO2018124669A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160179568A KR101936180B1 (ko) 2016-12-26 2016-12-26 무선 충전 방법 및 그를 위한 장치 및 시스템
KR10-2016-0179568 2016-12-26

Publications (1)

Publication Number Publication Date
WO2018124669A1 true WO2018124669A1 (fr) 2018-07-05

Family

ID=62709670

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/015413 Ceased WO2018124669A1 (fr) 2016-12-26 2017-12-22 Procédé de charge sans fil et appareil et système associés

Country Status (2)

Country Link
KR (1) KR101936180B1 (fr)
WO (1) WO2018124669A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190052117A1 (en) * 2017-08-11 2019-02-14 Integrated Device Technology, Inc. Wireless power transmitter to receiver communication during power transfer phase
WO2022040667A1 (fr) * 2020-08-17 2022-02-24 Ecoatm, Llc Évaluation d'un dispositif électronique à l'aide d'un chargeur sans fil
US11436570B2 (en) 2014-10-31 2022-09-06 Ecoatm, Llc Systems and methods for recycling consumer electronic devices
US11462868B2 (en) 2019-02-12 2022-10-04 Ecoatm, Llc Connector carrier for electronic device kiosk
US11482067B2 (en) 2019-02-12 2022-10-25 Ecoatm, Llc Kiosk for evaluating and purchasing used electronic devices
US11505077B2 (en) * 2020-05-27 2022-11-22 Toyota Motor Engineering & Manufacturing North America, Inc. Systems and methods for wireless vehicle power transfer and misalignment estimation
US11798250B2 (en) 2019-02-18 2023-10-24 Ecoatm, Llc Neural network based physical condition evaluation of electronic devices, and associated systems and methods
US11922467B2 (en) 2020-08-17 2024-03-05 ecoATM, Inc. Evaluating an electronic device using optical character recognition
US11989710B2 (en) 2018-12-19 2024-05-21 Ecoatm, Llc Systems and methods for vending and/or purchasing mobile phones and other electronic devices
US11989701B2 (en) 2014-10-03 2024-05-21 Ecoatm, Llc System for electrically testing mobile devices at a consumer-operated kiosk, and associated devices and methods
US12271929B2 (en) 2020-08-17 2025-04-08 Ecoatm Llc Evaluating an electronic device using a wireless charger
EP4472029A3 (fr) * 2018-08-01 2025-04-09 Lg Electronics Inc. Appareil et procédé permettant d'effectuer une transmission d'énergie sans fil sur la base d'une détection de matière étrangère
US12321965B2 (en) 2020-08-25 2025-06-03 Ecoatm, Llc Evaluating and recycling electronic devices
US12322259B2 (en) 2018-12-19 2025-06-03 Ecoatm, Llc Systems and methods for vending and/or purchasing mobile phones and other electronic devices
US12380420B2 (en) 2019-12-18 2025-08-05 Ecoatm, Llc Systems and methods for vending and/or purchasing mobile phones and other electronic devices

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020050592A1 (fr) * 2018-09-06 2020-03-12 엘지전자 주식회사 Dispositif et procédé servant à prendre en charge une vitesse de communication variable dans un système de transmission d'énergie sans fil
KR20250068778A (ko) 2018-10-26 2025-05-16 엘지전자 주식회사 무선 전력 전송 시스템에서 데이터를 전송 또는 수신하는 장치 및 방법
KR102728121B1 (ko) 2019-02-19 2024-11-11 삼성전자주식회사 외부 장치를 무선 충전하기 위한 전자 장치
KR20210146571A (ko) 2020-05-27 2021-12-06 삼성전자주식회사 무선으로 전력을 수신하는 전자 장치 및 그 동작 방법
WO2023243817A1 (fr) * 2022-06-15 2023-12-21 삼성전자주식회사 Dispositif de transmission d'énergie sans fil, dispositif de réception d'énergie sans fil et procédé de fonctionnement associé
EP4462643A4 (fr) 2022-06-15 2025-05-07 Samsung Electronics Co., Ltd. Dispositif de transmission d'énergie sans fil, dispositif de réception d'énergie sans fil et procédé de fonctionnement associé

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110106456A (ko) * 2009-01-22 2011-09-28 퀄컴 인코포레이티드 무선 충전을 위한 적응 전력 제어
KR20120132225A (ko) * 2011-05-27 2012-12-05 엘지전자 주식회사 무선 전력 전송을 이용한 데이터 통신 연결 수립
KR20130132175A (ko) * 2012-05-25 2013-12-04 엘지이노텍 주식회사 무선전력 송신장치, 전력 공급 장치 및 그의 전력 제어 방법
KR20140138554A (ko) * 2014-10-22 2014-12-04 엘지이노텍 주식회사 무선전력 수신장치, 무선전력 수신 방법, 정보 전송 방법 및 정보 수신 방법
KR20150093589A (ko) * 2014-02-07 2015-08-18 엘지전자 주식회사 무선 전력 전송방법, 무선 전력 전송장치, 무선 전력 수신장치 및 무선 충전 시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110106456A (ko) * 2009-01-22 2011-09-28 퀄컴 인코포레이티드 무선 충전을 위한 적응 전력 제어
KR20120132225A (ko) * 2011-05-27 2012-12-05 엘지전자 주식회사 무선 전력 전송을 이용한 데이터 통신 연결 수립
KR20130132175A (ko) * 2012-05-25 2013-12-04 엘지이노텍 주식회사 무선전력 송신장치, 전력 공급 장치 및 그의 전력 제어 방법
KR20150093589A (ko) * 2014-02-07 2015-08-18 엘지전자 주식회사 무선 전력 전송방법, 무선 전력 전송장치, 무선 전력 수신장치 및 무선 충전 시스템
KR20140138554A (ko) * 2014-10-22 2014-12-04 엘지이노텍 주식회사 무선전력 수신장치, 무선전력 수신 방법, 정보 전송 방법 및 정보 수신 방법

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11989701B2 (en) 2014-10-03 2024-05-21 Ecoatm, Llc System for electrically testing mobile devices at a consumer-operated kiosk, and associated devices and methods
US11436570B2 (en) 2014-10-31 2022-09-06 Ecoatm, Llc Systems and methods for recycling consumer electronic devices
US20190052117A1 (en) * 2017-08-11 2019-02-14 Integrated Device Technology, Inc. Wireless power transmitter to receiver communication during power transfer phase
EP4472029A3 (fr) * 2018-08-01 2025-04-09 Lg Electronics Inc. Appareil et procédé permettant d'effectuer une transmission d'énergie sans fil sur la base d'une détection de matière étrangère
US12322259B2 (en) 2018-12-19 2025-06-03 Ecoatm, Llc Systems and methods for vending and/or purchasing mobile phones and other electronic devices
US11989710B2 (en) 2018-12-19 2024-05-21 Ecoatm, Llc Systems and methods for vending and/or purchasing mobile phones and other electronic devices
US11462868B2 (en) 2019-02-12 2022-10-04 Ecoatm, Llc Connector carrier for electronic device kiosk
US11482067B2 (en) 2019-02-12 2022-10-25 Ecoatm, Llc Kiosk for evaluating and purchasing used electronic devices
US12300059B2 (en) 2019-02-12 2025-05-13 Ecoatm, Llc Kiosk for evaluating and purchasing used electronic devices
US11843206B2 (en) 2019-02-12 2023-12-12 Ecoatm, Llc Connector carrier for electronic device kiosk
US12223684B2 (en) 2019-02-18 2025-02-11 Ecoatm, Llc Neural network based physical condition evaluation of electronic devices, and associated systems and methods
US11798250B2 (en) 2019-02-18 2023-10-24 Ecoatm, Llc Neural network based physical condition evaluation of electronic devices, and associated systems and methods
US12380420B2 (en) 2019-12-18 2025-08-05 Ecoatm, Llc Systems and methods for vending and/or purchasing mobile phones and other electronic devices
US11505077B2 (en) * 2020-05-27 2022-11-22 Toyota Motor Engineering & Manufacturing North America, Inc. Systems and methods for wireless vehicle power transfer and misalignment estimation
US12033454B2 (en) 2020-08-17 2024-07-09 Ecoatm, Llc Kiosk for evaluating and purchasing used electronic devices
US11922467B2 (en) 2020-08-17 2024-03-05 ecoATM, Inc. Evaluating an electronic device using optical character recognition
US12271929B2 (en) 2020-08-17 2025-04-08 Ecoatm Llc Evaluating an electronic device using a wireless charger
WO2022040667A1 (fr) * 2020-08-17 2022-02-24 Ecoatm, Llc Évaluation d'un dispositif électronique à l'aide d'un chargeur sans fil
US12321965B2 (en) 2020-08-25 2025-06-03 Ecoatm, Llc Evaluating and recycling electronic devices

Also Published As

Publication number Publication date
KR101936180B1 (ko) 2019-01-08
KR20180075342A (ko) 2018-07-04

Similar Documents

Publication Publication Date Title
WO2018124669A1 (fr) Procédé de charge sans fil et appareil et système associés
WO2018080049A1 (fr) Bobine de charge sans fil d'émetteur et de récepteur d'énergie sans fil, et procédé de production associé
WO2018004120A1 (fr) Procédé de détection de corps étrangers, et appareil et système associés
WO2017003117A1 (fr) Procédé de transmission d'énergie sans fil multimode et dispositif correspondant
WO2017030354A1 (fr) Émetteur de puissance sans fil et unité de commande de véhicule connectée à celui-ci
WO2018004117A1 (fr) Procédé et dispositif de commande de puissance sans fil pour une charge sans fil
WO2018199671A1 (fr) Procédé de charge sans fil, et dispositif et système associés
WO2017217663A1 (fr) Procédé de détection de corps étrangers, et appareil et système correspondants
WO2017111369A1 (fr) Émetteur d'énergie sans fil prenant en charge plusieurs modes
WO2016182208A1 (fr) Procédé de transfert d'énergie sans fil, procédé de réception d'énergie sans fil, et appareil correspondant
WO2015060570A1 (fr) Procédé, appareil et système de transfert d'énergie sans fil
WO2016080594A1 (fr) Dispositif d'émission de puissance sans fil, dispositif de réception de puissance sans fil, et système de charge sans fil
WO2018105915A1 (fr) Procédé de détection d'objet étranger et son appareil
WO2017018668A1 (fr) Procédé et appareil d'identification de récepteur d'énergie sans fil
WO2014200247A1 (fr) Procédé de transfer d'énergie sans fil, émetteur d'énergie sans fil et système de charge sans fil
WO2013172630A1 (fr) Dispositif de transfert d'énergie sans fil et système de charge sans fil ayant celui-ci
WO2015080539A1 (fr) Procédé, appareil et système de transfert de puissance sans fil
WO2017209390A1 (fr) Procédé et appareil de commutation de mode de transmission d'énergie sans fil
WO2016006892A1 (fr) Procédé, appareil et système de transfert d'énergie sans fil
WO2019208960A1 (fr) Dispositif et procédé permettant d'exécuter un étalonnage de puissance dans un système de transmission de puissance sans fil
WO2015119458A1 (fr) Procédé, appareil et système de transfert et de réception d'énergie sans fil
WO2018212499A1 (fr) Procédé de charge sans fil, et appareil et système associés
WO2018004116A1 (fr) Procédé et dispositif de transmission de puissance sans fil dans un système de charge sans fil
WO2018008841A1 (fr) Procédé et appareil de commande de puissance sans fil pour une charge sans fil
WO2017217662A1 (fr) Procédé de détection d'objets étrangers, ainsi qu'appareil et système associés

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17886617

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17886617

Country of ref document: EP

Kind code of ref document: A1