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WO2018012726A1 - Appareil de réception de puissance de charge sans fil prenant en charge de multiples systèmes de charge sans fil - Google Patents

Appareil de réception de puissance de charge sans fil prenant en charge de multiples systèmes de charge sans fil Download PDF

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Publication number
WO2018012726A1
WO2018012726A1 PCT/KR2017/005188 KR2017005188W WO2018012726A1 WO 2018012726 A1 WO2018012726 A1 WO 2018012726A1 KR 2017005188 W KR2017005188 W KR 2017005188W WO 2018012726 A1 WO2018012726 A1 WO 2018012726A1
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WO
WIPO (PCT)
Prior art keywords
wireless charging
charging power
signal
communication
voltage
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/KR2017/005188
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English (en)
Korean (ko)
Inventor
김용우
손철호
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Sungjin Integrated Ic Ltd
Original Assignee
Sungjin Integrated Ic 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 Sungjin Integrated Ic Ltd filed Critical Sungjin Integrated Ic Ltd
Publication of WO2018012726A1 publication Critical patent/WO2018012726A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02J50/80—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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • 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
    • H04B5/70—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

Definitions

  • Embodiments of the present invention relate to techniques for a wireless charging power receiver for receiving charging power from a wireless charging power transmitter.
  • Such wireless charging techniques include a wireless charging technique according to electromagnetic induction and a wireless charging technique according to magnetic resonance. Both the wireless charging technique based on electromagnetic induction and the wireless charging technique based on magnetic resonance use non-radial attenuated alternating current signals around the coil in the near field. That is, a method of charging a battery without a contact terminal by using an inductive coupling between a primary coil of a wireless charging power transmitter and a secondary coil of a wireless charging power receiver is introduced.
  • the wireless charging power receiver receives the charging power having the AC signal from the wireless charging power transmitter, the AC voltage applied to the charging power receiver is rectified to the DC voltage through the rectifying unit, and the DC power is applied to the battery using the DC voltage.
  • the battery is configured to charge the battery by generating a constant voltage and a constant current to be supplied and then supplying the same to the battery.
  • the wireless charging power receiver performs a pre-operation to be connected to the wireless charging power transmitter in order to normally receive the charging power from the wireless charging power transmitter to charge the battery.
  • the wireless charging power transmitter transmits communication charging power to the wireless charging power receiver to be connected with the wireless charging power receiver before the charging power is transmitted to the wireless charging power receiver in earnest. do.
  • the wireless charging power receiver when the wireless charging power receiver receives the communication charging power, the wireless charging power receiver transmits a response signal indicating whether the communication charging power is normally received to the wireless charging power transmitter, and the wireless charging power transmitter transmits the response signal.
  • the wireless charging power receiver When normally fed back, the wireless charging power receiver starts to transmit charging power in earnest.
  • wireless charging methods to date include wireless charging using WPC (Wireless Power Consortium), wireless charging using PMA (Power Matters Alliance), and wireless charging using A4WP (Alliance for Wireless Power).
  • WPC Wireless Power Consortium
  • PMA Power Matters Alliance
  • A4WP Alliance for Wireless Power
  • WPC and PMA methods are self-induction wireless charging methods.
  • WPC is configured to transmit wireless charging power signals in the 110-205 kHz band
  • PMA is configured to transmit wireless charging power signals in the 110-357 kHz band. .
  • the A4WP scheme is a magnetic resonance wireless charging scheme, and is configured to transmit a wireless charging power signal in a 6.78 MHz band.
  • the communication charging power is transferred to the wireless charging power receiver in the 110-205 kHz or 110-357 kHz band defined to transmit the wireless charging power signal.
  • the communication protocol is configured such that the wireless charging power receiver transmits a response signal to the wireless charging power transmitter through in-band communication in the same frequency band as the corresponding frequency band in which the communication charging power is transmitted. It is prescribed.
  • the wireless charging power receiver when the wireless charging power transmitter is connected to the wireless charging power receiver, when the wireless charging power receiver transmits the communication charging power in the 6.78 MHz band defined to transmit the wireless charging power signal, the wireless charging power receiver is wirelessly charged.
  • An out-of-band communication protocol is specified that allows the power receiver to transmit a response signal to the wireless charging power transmitter through Bluetooth communication in the 2.4 GHz band instead of the 6.78 MHz band. have.
  • the wireless charging power receiver includes an integrated antenna for receiving wireless charging power signals of all WPC, PMA, and A4WP methods, rectifies the wireless charging power received by each method, and supplies constant voltage and constant current to the battery. It is equipped with an integrated wireless charging signal processing chip to supply.
  • the wireless charging power receiver when the wireless charging power receiver receives the communication charging power for the first connection from the wireless charging power transmitter, the wireless charging power receiver analyzes the corresponding charging power for the communication. After accurately determining whether or not the wireless charging method, it is necessary to be configured to transmit a response signal to the wireless charging power transmission apparatus based on the determined communication protocol according to the wireless charging method. This is because if the wireless charging method is correctly determined based on the communication charging power first received from the wireless charging power transmitter, the wireless charging power transmitter may be connected to the wireless charging power transmitter to receive the wireless charging power according to the determined wireless charging method. .
  • the wireless charging scheme of the wireless charging power transmitter is accurately determined based on the communication charging power transmitted from the wireless charging power transmitter. Research of techniques to distinguish is necessary.
  • the present invention converts the input AC voltage by the communication charging power into a pulse width modulation (PWM) signal and generates a clock signal having a predetermined period. After measuring the number of clocks that can be included in the high pulse signal of the PWM signal, the number of clocks is converted into bit data to refer to a bit table in which a range of different bit data is recorded for each of a plurality of wireless charging schemes.
  • An object of the present invention is to provide a wireless charging power receiver supporting a plurality of wireless charging schemes capable of accurately determining a wireless charging scheme of the wireless charging power transmitter by identifying a first wireless charging scheme corresponding to the converted bit data.
  • An apparatus for receiving wireless charging power supporting a plurality of wireless charging schemes stores and maintains a bit table in which different preset ranges of bit data are recorded for each of a plurality of different wireless charging schemes.
  • a bit table holding unit a charging power receiving unit receiving communication charging power for wireless charging transmitted from a wireless charging power transmitting device, and when the communication charging power in an AC form is applied to the charging power receiving unit,
  • a PWM converter for sensing an AC voltage applied to a charging power receiver and converting the AC voltage into a pulse width modulation (PWM) signal, generating a clock signal having a predetermined period, and generating the PWM signal and the clock signal.
  • PWM pulse width modulation
  • a clock measuring unit for measuring the number of clocks of the clock signal, and converting the number of clocks into bit data and recording corresponding to the range of bit data including the converted bit data on the bit table.
  • the wireless charging power receiving apparatus supporting a plurality of wireless charging schemes converts an input AC voltage by the communication charging power into a pulse width modulation (PWM) signal when communication charging power is received from the wireless charging power transmitter.
  • PWM pulse width modulation
  • the wireless charging method of the wireless charging power transmitter can be accurately determined.
  • FIG. 1 is a diagram illustrating a structure of a wireless charging power receiving apparatus supporting a plurality of wireless charging schemes according to an embodiment of the present invention.
  • FIG. 2 is a view for explaining a wireless charging power receiving apparatus supporting a plurality of wireless charging schemes according to an embodiment of the present invention.
  • FIG. 1 is a diagram illustrating a structure of a wireless charging power receiving apparatus supporting a plurality of wireless charging schemes according to an embodiment of the present invention.
  • a wireless charging power receiver 110 supporting a plurality of wireless charging schemes may include a bit table maintaining unit 111, a charging power receiving unit 112, and a pulse width (PWM). Modulation) includes a converter 113, a clock measuring unit 114, a wireless charging method checking unit 115, and a response signal transmitting unit 116.
  • PWM pulse width
  • the bit table holding unit 111 stores and maintains a bit table in which different preset ranges of bit data are recorded for each of a plurality of different wireless charging schemes.
  • information may be recorded in the bit table as shown in Table 1 below.
  • Wireless charging schemes Range of bit data Wireless charging method 1 0-1000 Wireless charging method 2 1001-1111 Wireless charging method 3 10000 ⁇ 11111 ... ...
  • the charging power receiver 112 receives charging power for communication for connection with the wireless charging power transmitter 130 transmitted from the wireless charging power transmitter 130.
  • the wireless charging power transmitter 130 includes a primary coil for transmitting charging power, and the charging power receiver 112 is magnetically coupled to each other by inductive coupling with the primary coil. It may include a secondary coil.
  • the magnetic field generated by the primary coil induces an induced current in the secondary coil, so that the charging power receiver 112 may receive the charging power for communication from the wireless charging power transmitter 130. .
  • the wireless charging power transmitter 130 rectifies the AC voltage from the commercial AC power source to DC to generate a magnetic field through the primary coil, and then uses the rectified DC voltage to generate a high frequency AC voltage above the commercial frequency.
  • a pulse may be generated and applied to the primary coil to generate a magnetic field.
  • the charging power receiver 112 may receive the AC charging power for communication, and when the AC charging power for the AC is applied to the charging power receiver 112, the PWM converter 113 may perform the communication.
  • An AC voltage applied to the charging power receiver 112 is sensed by the charging power to convert the AC voltage into a PWM signal.
  • the PWM converter 113 senses the AC voltage and converts the signal portion having a positive value from the AC voltage into a high pulse signal, the signal portion having a negative value By converting the signal into a low pulse signal, the AC voltage can be converted into the PWM signal.
  • the clock measuring unit 114 generates a clock signal having a predetermined period, compares the PWM signal with the clock signal, and includes the clock signal that can be included in a high pulse signal within one period of the PWM signal. Measure the number of clocks.
  • the wireless charging method checking unit 115 converts the number of clocks into bit data and then checks a first wireless charging method recorded corresponding to a range of bit data including the converted bit data on the bit table. do.
  • the response signal transmitter 116 transmits the response signal to the wireless charging power transmitter 130 based on a communication protocol preset in accordance with the first wireless charging scheme.
  • FIG. 2 is a diagram illustrating a wireless charging power receiver 110 supporting a plurality of wireless charging schemes according to an embodiment of the present invention.
  • an AC voltage applied by the charging power for communication received from the wireless charging power transmitter 130 to the charging power receiver 112 has a signal waveform of 210.
  • the PWM converter 113 may sense the AC voltage having the signal waveform of 210 and convert the AC voltage into a PWM signal having the signal waveform of 220.
  • the PWM converter 113 senses the AC voltage and converts the signal portions 211 and 212 having a positive value from the AC voltage into the high pulse signals 221 and 222 and having a negative value.
  • the signal portions 213 and 214 into low pulse signals 223 and 224, the alternating current voltage shown at 210 can be converted into the PWM signal as shown at 220.
  • the clock measuring unit 114 generates a clock signal having a predetermined period as shown by reference numeral 230, compares the PWM signal with the clock signal, and generates a high pulse within one period of the PWM signal.
  • the number of clocks of the clock signal included in the signal may be measured.
  • the wireless charging method checking unit 115 may convert the number of clocks of "9” into bit data of "1001" in binary.
  • the wireless charging method checking unit 115 confirms the first wireless charging method recorded corresponding to the range of the bit data including the converted bit data "1001" on the bit table as shown in Table 1 above. Can be.
  • the wireless charging method checking unit 115 performs the first charging. You can check the "wireless charging method 2" as a wireless charging method.
  • the response signal transmitter 116 transmits a response signal to the communication charging power based on a communication protocol preset according to the first wireless charging method “wireless charging method 2”. 130).
  • the wireless charging power receiver 110 supporting the plurality of wireless charging schemes may further include a communication protocol information table holding unit 117.
  • the communication protocol information table holding unit 117 stores and maintains a communication protocol information table in which information on communication protocols corresponding to the plurality of different wireless charging schemes is recorded.
  • information may be recorded in the communication protocol information table as shown in Table 2 below.
  • Wireless charging schemes Communication protocol information Wireless charging method 1 Communication protocol 1 Wireless charging method 2 Communication protocol 2 Wireless charging method 3 Communication protocol 3 ... ...
  • the response signal transmitter 116 confirms the information on the communication protocol corresponding to the first wireless charging scheme from the communication protocol information table, and then confirms the checked communication protocol. Based on the response signal for the communication charging power may be transmitted to the wireless charging power transmission device 130.
  • the response signal transmitter 116 may correspond to the "wireless charging method 2" from the communication protocol information table as shown in Table 2 above. After confirming the information on the "communication protocol 2", based on the identified “communication protocol 2” may transmit a response signal for the communication charging power to the wireless charging power transmission device 130.
  • the plurality of different wireless charging schemes may include wireless charging of WPC (Wireless Power Consortium), wireless charging of PMA (Power Matters Alliance), and A4WP (Alliance for Wireless Power). It may be a wireless charging method.
  • WPC Wireless Power Consortium
  • PMA Power Matters Alliance
  • A4WP Alliance for Wireless Power
  • the wireless charging method checking unit 115 when the first wireless charging method identified by the wireless charging method checking unit 115 is the wireless charging method of the WPC method or the wireless charging method of the PMA method, a response signal is transmitted.
  • the unit 116 may transmit the response signal to the wireless charging power transmitter 130 through in-band communication through the 110-205 kHz or the 110-357 kHz band, and the first wireless charging scheme may be In the case of the A4WP wireless charging method, the response signal transmitter 116 transmits the response signal to the wireless charging power transmission device in an out-of-band manner through Bluetooth communication in the 2.4 GHz band. 130).
  • the wireless charging method checking unit 115 is the first wireless charging method that is recorded corresponding to the range of the bit data including the converted bit data on the bit table When the WPC scheme and the PMA scheme overlap, the first wireless charging scheme may be identified as the WPC scheme.
  • the WPC method transmits the communication charging power through the 110-205 kHz band
  • the PMA method is specified to transmit the communication charging power through the 110-357 kHz band
  • the WPC method and the PMA method There may be a portion where the frequency band for transmitting the communication charging power overlap.
  • the wireless charging method checking unit 115 After the number of clocks is converted into bit data by the wireless charging method checking unit 115, the first wireless charging method corresponding to the range of bit data including the converted bit data is identified on the bit table.
  • the WPC scheme and the PMA scheme overlap with each other in the first wireless charging scheme recorded corresponding to the bit data range including the converted bit data, the WPC scheme and the PMA scheme may be used.
  • the WPC method may be confirmed as the first wireless charging method.
  • the response signal transmitter 116 may transmit a response signal to the wireless charging power transmitter 130 based on the communication protocol preset according to the WPC scheme.
  • the response signal transmitter 116 determines whether the wireless charging power is normally received from the wireless charging power transmitter 130 within a predetermined time from when the response signal is transmitted to the wireless charging power transmitter 130. You can check it.
  • the wireless charging power transmitter 130 is the wireless charging power transmitter 130 according to the WPC method. Therefore, the wireless charging power receiver 110 supporting the plurality of wireless charging schemes may receive the wireless charging power from the wireless charging power transmitter 130 in the WPC manner.
  • the wireless charging power transmitter 130 is a wireless charging method of the WPC method Since not, the wireless charging method checking unit 115 may reset the first wireless charging method to the PMA method.
  • the response signal transmitter 116 retransmits the response signal for the communication charging power to the wireless charging power transmission device 130 based on a communication protocol preset in accordance with the PMA scheme, thereby transmitting wireless charging power.
  • the apparatus 130 and the wireless charging power receiver 110 supporting the plurality of wireless charging schemes may assist the wireless charging of the battery according to the PMA scheme.
  • the wireless charging power receiver 110 supporting a plurality of wireless charging schemes includes a voltage table holding unit 118, a current table holding unit 119, an input checking unit 120, and a voltage.
  • the determination unit 121, the current determination unit 122, and the reception blocking unit 123 may be further included.
  • the voltage table holding unit 118 stores and maintains a voltage table in which a predetermined first peak value for different input voltages is recorded for each of the plurality of different wireless charging schemes.
  • the limit input voltage to be applied to the wireless charging power receiver 110 supporting a plurality of wireless charging schemes is defined as 15V.
  • the first peak value selected for the wireless charging method of the WPC method may be defined as “15V” on the voltage table.
  • the limit input voltage to be applied to the wireless charging power receiver 110 supporting a plurality of wireless charging schemes is defined as 18V, and when it exceeds this, A4WP wireless charging
  • the first peak value selected for the A4WP wireless charging method may be defined as “18V” on the voltage table.
  • the current table holding unit 119 stores and maintains a current table in which a predetermined second peak value for different input currents is recorded for each of the plurality of different wireless charging schemes.
  • the limit input current to be applied to the wireless charging power receiver 110 supporting a plurality of wireless charging schemes is defined as 2A. May not be able to support normally, the second peak value selected for the wireless charging method of the WPC method may be defined as "2A" on the current table.
  • the limit input current to be applied to the wireless charging power receiver 110 supporting a plurality of wireless charging schemes is defined as 1A, and when it exceeds this, A4WP wireless charging May not normally support, the second peak value selected for the A4WP wireless charging method may be defined as “1A” on the current table.
  • the input confirmation unit 120 after the transmission of the response signal for the communication charging power is completed from the wireless charging power transmission device 130 based on the communication protocol that is set in advance according to the first wireless charging method is the wireless charging power When received, check the input voltage and the input current according to the received wireless charging power.
  • the voltage determination unit 121 determines whether the input voltage exceeds a predetermined first peak value recorded corresponding to the first wireless charging scheme on the voltage table.
  • the current determiner 122 determines whether the input current exceeds a predetermined second peak value recorded corresponding to the first wireless charging scheme on the voltage table.
  • the reception blocking unit 123 determines that the input voltage exceeds a predetermined first peak value recorded corresponding to the first wireless charging method, or records the input current corresponding to the first wireless charging method. When it is determined that the predetermined second peak value is exceeded, reception of the wireless charging power transmitted from the wireless charging power transmitter 130 is blocked.
  • the first wireless charging scheme is determined.
  • the rectifier or the constant voltage included in the wireless charging power receiver 110 supporting a plurality of wireless charging schemes In order to optimally support charging of the battery after receiving the wireless charging power from the wireless charging power transmitter 130, the rectifier or the constant voltage included in the wireless charging power receiver 110 supporting a plurality of wireless charging schemes.
  • a control unit (not shown) for setting an operation setting value of wireless charging components such as a constant current unit to a value optimized for the first wireless charging scheme.
  • the wireless charging power receiver 110 supporting a plurality of wireless charging schemes according to the present invention, when the communication charging power is received from the wireless charging power transmission device 130, PWM input voltage by the communication charging power PWM Convert the signal into a signal, generate a clock signal having a predetermined period, measure the number of clocks that can be included in the high pulse signal of the PWM signal, and convert the number of clocks into bit data to form a plurality of wireless charging schemes.
  • the wireless charging method of the wireless charging power transmitter 130 may be accurately determined.

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

Abstract

Selon la présente invention, lors de la réception d'une puissance de charge pour une communication à partir d'un appareil de transmission de puissance de charge sans fil, un appareil de réception de puissance de charge sans fil prenant en charge de multiples systèmes de charge sans fil convertit une tension de courant alternatif (CA) d'entrée due à la puissance de charge pour la communication en un signal de modulation de largeur d'impulsion (PWM), génère un signal d'horloge présentant une période prédéterminée pour mesurer le nombre d'horloges qui peuvent être comprises dans un signal d'impulsion élevée du signal PWM, puis convertit le nombre d'horloges en données de bits pour identifier un premier système de charge sans fil correspondant aux données de bits converties en faisant référence à une table de bits dans laquelle différentes plages de données de bits sont enregistrées selon de multiples systèmes de charge sans fil. Par conséquent, l'appareil de réception de puissance de charge sans fil peut déterminer avec précision un système de charge sans fil de l'appareil de transmission de puissance de charge sans fil.
PCT/KR2017/005188 2016-07-14 2017-05-18 Appareil de réception de puissance de charge sans fil prenant en charge de multiples systèmes de charge sans fil Ceased WO2018012726A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0089507 2016-07-14
KR1020160089507A KR101744586B1 (ko) 2016-07-14 2016-07-14 복수의 무선 충전 방식들을 지원하는 무선 충전 전력 수신 장치

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WO2018012726A1 true WO2018012726A1 (fr) 2018-01-18

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JP2024045344A (ja) * 2018-04-16 2024-04-02 エルジー エレクトロニクス インコーポレイティド 無線電力送信システムにおいて電力制御を行う装置及び方法

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US11005307B2 (en) 2018-04-16 2021-05-11 Lg Electronics Inc. Apparatus and method for performing power control in wireless power transfer system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024045344A (ja) * 2018-04-16 2024-04-02 エルジー エレクトロニクス インコーポレイティド 無線電力送信システムにおいて電力制御を行う装置及び方法
JP7670881B2 (ja) 2018-04-16 2025-04-30 エルジー エレクトロニクス インコーポレイティド 無線電力送信システムにおいて電力制御を行う装置及び方法

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