WO2016195218A1 - Système de charge sans fil - Google Patents

Système de charge sans fil Download PDF

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Publication number
WO2016195218A1
WO2016195218A1 PCT/KR2016/002646 KR2016002646W WO2016195218A1 WO 2016195218 A1 WO2016195218 A1 WO 2016195218A1 KR 2016002646 W KR2016002646 W KR 2016002646W WO 2016195218 A1 WO2016195218 A1 WO 2016195218A1
Authority
WO
WIPO (PCT)
Prior art keywords
wireless power
wireless
power transmission
transmission module
circuit
Prior art date
Application number
PCT/KR2016/002646
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English (en)
Korean (ko)
Inventor
정두원
Original Assignee
주식회사 엘트로닉스
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 주식회사 엘트로닉스 filed Critical 주식회사 엘트로닉스
Publication of WO2016195218A1 publication Critical patent/WO2016195218A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • 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

Definitions

  • Embodiments of the present invention relate to wireless charging technology.
  • An embodiment of the present invention is to provide a wireless charging system that can reduce the power consumption.
  • An embodiment of the present invention is to provide a wireless charging system that can improve the wireless power transmission efficiency.
  • the wireless charging system includes a wireless power transmission module for transmitting wireless power and at least one wireless charger for receiving the wireless power to charge a battery, wherein the wireless power transmission module is A wireless power transmission circuit generating wireless power and transmitting the same to the air; A first communication block checking whether a wireless charger exists within a preset distance; And a control block for generating a sleep signal to the wireless power transmission circuit when the wireless charger does not exist within the preset distance.
  • the wireless power transmission module may be configured to wirelessly charge a plurality of wireless chargers simultaneously, each of the plurality of wireless chargers including: a receiving coil configured to receive wireless power transmitted from the wireless power transmission module; A matching circuit electrically connected to the receiving coil; And a control block for checking whether the charging of the battery is completed and controlling the matching circuit so that the resonance frequency band of the receiving coil is out of the frequency band of the wireless power when the charging of the battery is completed.
  • the wireless charger may include: a power conversion circuit configured to charge a battery by receiving wireless power transmitted from the wireless power transmission module; A monitoring unit monitoring a change in impedance of the power conversion circuit when the wireless power is received; And a second communication block configured to transmit the information on the impedance change to the wireless power transmission module, wherein the wireless power transmission module is configured to, from the second communication block.
  • the current and voltage of the amplifier in the wireless power transmission circuit may be adjusted using the received information about the impedance change.
  • the power consumption when the mobile device is not charged, the power consumption may be reduced by operating at low power.
  • the power change of the wireless power receiving device to the wireless power transmitting device and accordingly impedance matching through the voltage / current control of the amplifier in the wireless power transmitting side, it is possible to improve the wireless power transmission efficiency. Will be.
  • FIG. 1 is a block diagram illustrating a wireless charging system in accordance with an exemplary embodiment.
  • FIG. 2 is a circuit diagram illustrating a circuit capable of implementing low power in a standby state according to an exemplary embodiment of the present invention.
  • FIG. 3 illustrates a structure of a Class-E amplifier according to an exemplary embodiment.
  • FIG. 4 is a circuit diagram of a Class-E power amplifier according to an exemplary embodiment.
  • FIG. 5 illustrates a rectifier, an analog digital converter (ADC), a low drop out regulator (LDO), and a monitoring circuit of an RF / DC power conversion circuit according to an exemplary embodiment.
  • ADC analog digital converter
  • LDO low drop out regulator
  • FIG. 6 illustrates a DC / DC converter circuit of an RF / DC power conversion circuit according to an exemplary embodiment.
  • FIG. 7 is a graph illustrating a change in current voltage during battery charging in a wireless charger according to an exemplary embodiment.
  • FIG. 8A schematically illustrates a wireless charging system according to an exemplary embodiment.
  • FIG. 8B is a diagram showing a circuit configuration of the wireless charging system shown in FIG. 8A.
  • FIG. 9 is a diagram showing an equivalent circuit of the wireless charging system circuit shown in FIG. 8B.
  • FIG. 10 is a schematic block diagram illustrating a state in which a control block of a wireless power transmission module controls a DC / DC converter to control a voltage current input to an amplifier according to an embodiment of the present invention and a structure of an amplifier.
  • FIG. 11 is a diagram showing a transmission block (wireless power transmission module) of a 6.78 MHz wireless charging system according to an exemplary embodiment.
  • FIG. 12 is a circuit diagram for current and voltage control of an amplifier of a wireless power transmission module according to an exemplary embodiment.
  • the terms "transfer”, “communication”, “transmit”, “receive” and other similar meanings of signals or information are not only meant to directly convey the signal or information from one component to another. It also includes passing through other components.
  • “transmitting” or “sending” a signal or information to a component indicates the final destination of the signal or information and does not mean a direct destination. The same is true for the "reception” of a signal or information.
  • that two or more pieces of data or information are "related” means that if one data (or information) is obtained, at least a portion of the other data (or information) can be obtained based thereon.
  • FIG. 1 is a block diagram illustrating a wireless charging system according to an exemplary embodiment.
  • the wireless charging system 100 includes a wireless power transmission module 102 and a wireless charger 104.
  • the wireless power transmission module 102 transmits wireless power to the air, and the wireless charger 104 receives the wireless power transmitted from the wireless power transmission module 102 to charge the battery.
  • wireless transmission efficiency depends on the efficiency of the amplifier to amplify by DC / RF conversion.
  • the wireless power transmission module 102 may use a Class-E power amplifier that is switchable to an amplifier 111 that converts DC to AC and amplifies it.
  • the wireless power transmission module 102 and the wireless charger 104 may include communication blocks 113 and 133 (ie, communication modules) for bidirectional communication.
  • the wireless power transmission module 102 may recognize the charging situation of the wireless charger 104 through the communication block 113.
  • the wireless power transmission module 102 may charge two or more wireless chargers 104 simultaneously.
  • the 2.4GHz Bluetooth communication module may be used as the communication block 113.
  • the wireless charger 104 supports the charging of the mobile device using the RF / DC power conversion circuit 131.
  • the RF / DC power conversion circuit 131 may rectify the wireless power (ie, AC power) received from the wireless power transmission module 102 into direct current (DC), convert DC-DC, and charge the battery.
  • the wireless power transmission module 102 may have circuitry that can minimize power consumption when not transmitting power (ie, in a standby state).
  • 2 is a circuit diagram illustrating a circuit capable of implementing low power in a standby state according to an exemplary embodiment of the present invention.
  • the wireless power transmission module 102 supplies 3.3V to the control block 125 of the wireless power transmission module 102 to sleep in the control block 125 when there is no wireless charger 104 within a predetermined distance.
  • a signal may be generated to turn off the wireless power transmission circuit 127.
  • the control block 125 may generate a sleep signal to a U1 (DC / DC Converter) chip in the circuit shown in FIG. 2 to turn off the U1 chip.
  • the U1 DC / DC converter operates every 400 ms.
  • the wireless power transmission module 102 may check whether the wireless charger 104 is within a predetermined distance through the communication block 113.
  • Class-E amplifiers are complex in structure but are energy efficient and can be made small.
  • the Class-E amplifier which is the amplifier 111, is designed to sequentially amplify two MOSFETs M1 and M2 by turning them ON / OFF.
  • 3 is a diagram illustrating a structure of a Class-E amplifier according to an exemplary embodiment. The Class-E amplifier shown in FIG. 3 has been proposed for improving intermodulation distortion (IMD).
  • IMD intermodulation distortion
  • the capacitor C0 and the inductor L0 are resonant circuits and may operate as a low pass filter (LPF) in the 6.78 MHz band.
  • the inductor L0 may be implemented to design a corresponding inductance as a resonant antenna of the wireless power transmission module 102 and perform impedance matching only with the capacitor C0.
  • the resonant antenna is viewed as a load, and an inductor is complicated by adding an inductor. Substituting the inductance of the resonant antenna eliminates the need for additional inductors.
  • the gate driver 115 may be used to synchronize the gate input signals of the two MOSFETs M1 and M2 of the amplifier 111.
  • an AND gate and a NAND gate may be used to make the phases of the gate input signals of the two MOSFETs M1 and M2 180 degrees out of phase.
  • 4 shows a circuit diagram of a Class-E power amplifier according to an exemplary embodiment.
  • the wireless charger 104 includes an RF / DC power conversion circuit 131.
  • the RF / DC power conversion circuit 131 includes a monitoring unit 141 for monitoring an input voltage when receiving wireless power, a rectifier 143 for rectifying the received wireless power, and different levels of rectified DC power. It may include a DC-DC converter 145 for converting the DC power of the, and a battery 147 for storing and charging the converted DC power.
  • the monitoring unit 141 may monitor the input voltage.
  • the input voltage of the rectifier 143 of the RF / DC power conversion circuit 131 may be designed to 6.5V ⁇ 60V.
  • the rectifier 134 may include a bridge circuit.
  • FIG. 5 is a diagram illustrating a rectifier, an analog digital converter (ADC), a low drop out regulator (LDO), and a monitoring circuit of the RF / DC power conversion circuit 131 according to an exemplary embodiment.
  • ADC Analog Digital Converter
  • LDO low drop out regulator
  • FIG. 5 the ADC (Analog Digital Converter) used a four-channel ADC IC, of which two channels (battery voltage and DC / DC output voltage monitoring) were used.
  • a circuit using a resistor was designed to reduce the voltage to the ADC input.
  • the Low Drop Out Regulator (LDO) TPS54160 IC has a 0.5V to 58V output and up to 1.5A current output. Rectifier output is expected to be designed up to 60V input. En pin operates in float setting, RT / CLK ping is set as resistor timing and external clock and 581KHz is applied by applying switching frequency as external resistance value of 200K. The distribution resistor was set to 5V output. The DC / DC output goes through the monitoring circuit to the ADC input.
  • 6 is a diagram illustrating a DC / DC converter circuit of the RF / DC power conversion circuit 131 according to an exemplary embodiment.
  • the wireless charging system 100 may use a Bluetooth low power communication mode between the wireless power transmission module 102 and the wireless charger 104.
  • a topology of a star structure in which several slaves (for example, the wireless charger 104) exist in one master (for example, the wireless power transmission module 102) may be used. Power transmission is possible only from the master to the slave, and communication may be implemented to enable bidirectional communication between the master and the slave.
  • the wireless power transmission module 102 When power is supplied to the wireless power transmission module 102, the wireless power transmission module 102 sends a beacon in a standby state through its own setting step to supply power for communication to the wireless charger 104.
  • the wireless charger 104 enters a boot state when the power for communication is transmitted and transmits a connection signal.
  • the wireless power transmission module 102 When the wireless charger 104 sends a connection signal, the wireless power transmission module 102 is in a low power state to prepare for power transmission.
  • the wireless power transmission module 102 may determine whether the wireless charger 104 exists in the vicinity through the reception of the access signal. Power transmission is started while the wireless power transmission module 102 sends a power transmission control signal, and the wireless charger 104 is in a power receiving state.
  • the wireless power transmission module 102 and the wireless charger 104 may include monitoring units 121 and 141 for voltage and current monitoring, respectively. Through the monitoring units 121 and 141, the wireless power transmission efficiency between the wireless power transmission module 102 and the wireless charger 104 may be calculated in real time to control voltage and current for wireless power transmission.
  • the matching circuit of the fully charged wireless charger 104 is controlled to 6.78MHz. (I.e., it is possible to prevent resonance from occurring in the wireless power frequency band).
  • the charging completion of the wireless charger 104 may move the resonance frequency band of the receiving coil of the wireless charger 104 out of the wireless power frequency band by adjusting the impedance of the matching circuit electrically connected to the receiving coil. have. Through this, when charging two or more wireless charger 104 at the same time, it is possible to continue the wireless charging for the remaining wireless charger 104 is not completed.
  • the coupling coefficient changes according to two situations (a situation where the coupling coefficient changes as the distance between the transmitting antenna and the receiving antenna gets closer and the impedance of the receiver changes due to the control method when the battery is charged). This coupling coefficient changes the input impedance by the reflected impedance.
  • the present invention proposes a method for solving impedance matching by adjusting the current and voltage of the amplifier 111 of the wireless power transmission module 102.
  • FIG. 7 is a graph illustrating a change in current voltage when charging a battery in a wireless charger according to an exemplary embodiment.
  • V (voltage) I (current) R ( Resistance)
  • This not only affects the resonance frequency at the receiver side, but also affects the impedance at the transmitter side.
  • FIG. 8A is a diagram schematically illustrating a wireless charging system according to an exemplary embodiment
  • FIG. 8B is a diagram illustrating a circuit configuration of the wireless charging system illustrated in FIG. 8A
  • 9 is a figure which shows the equivalent circuit of the wireless charging system circuit shown to FIG. 8 (b).
  • Equation 1 the input impedance Zin seen by the amplifier 111 of the wireless power transmission module 102 is expressed by Equation 1 below.
  • Zpm is the impedance seen from the transmitter coil to the receiver side.
  • Equation 1 it can be seen that the input impedance is changed by the load resistance Z0 on the receiver side.
  • the communication block 133 (That is, the voltage current detection information may be transmitted to the wireless power transmission module 113 through the communication module. Then, the control block of the wireless power transmission module 113 may calculate the impedance of the wireless charger 104 using the received voltage current detection information.
  • FIG. 10 is a schematic block diagram illustrating a state in which the control block 125 of the wireless power transmission module 113 controls the DC / DC converter to control the voltage current input to the amplifier 111 according to an embodiment of the present invention. And a diagram showing the structure of the recorder.
  • control block 125 may control a change in the impedance of the amplifier 111 facing the receiver according to the change in the impedance of the wireless charger 104 calculated based on the voltage current detection information. In this case, a change in the voltage current at the receiver side occurs and reflects the change again to detect the optimum transmission efficiency by performing the voltage current.
  • 11 is a diagram illustrating a transmission block (wireless power transmission module) of a 6.78 MHz wireless charging system according to an exemplary embodiment.
  • 12 is a circuit diagram for controlling current and voltage of an amplifier of a wireless power transmission module according to an exemplary embodiment.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un système de charge sans fil. Un système de charge sans fil selon un mode de réalisation donné à titre d'exemple comprend : un module de transmission de puissance sans fil pour transmettre de la puissance sans fil; et au moins un chargeur sans fil pour charger une batterie en recevant la puissance sans fil, le module de transmission de puissance sans fil comprenant : un circuit de transmission de puissance sans fil qui génère de la puissance sans fil et transmet la puissance sans fil générée dans l'air; un premier bloc de communication pour vérifier si un chargeur sans fil existe dans une distance prédéterminée; et un bloc de commande qui, lorsqu'il n'existe aucun chargeur sans fil dans la distance prédéterminée, génère un signal de veille dans le circuit de transmission de puissance sans fil.
PCT/KR2016/002646 2015-06-03 2016-03-16 Système de charge sans fil WO2016195218A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150078370A KR20160142524A (ko) 2015-06-03 2015-06-03 무선 충전 장치
KR10-2015-0078370 2015-06-03

Publications (1)

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WO2016195218A1 true WO2016195218A1 (fr) 2016-12-08

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PCT/KR2016/002646 WO2016195218A1 (fr) 2015-06-03 2016-03-16 Système de charge sans fil

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WO (1) WO2016195218A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018203608A1 (fr) * 2017-05-02 2018-11-08 Samsung Electronics Co., Ltd. Appareil de transmission d'électricité sans fil qui est désactivé dans un état de veille et appareil électronique comprenant un appareil de transmission d'électricité sans fil
FR3077738A1 (fr) * 2018-02-09 2019-08-16 Orion Biotech Inc. Structure d'amplification de charge sans fil à longue portée pour dispositifs médicaux implantables

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11699920B2 (en) 2020-02-04 2023-07-11 Samsung Electronics Co., Ltd. Device and method for receiving power wirelessly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080038683A (ko) * 2006-10-30 2008-05-07 엘지전자 주식회사 무선 전원 공급 장치 및 그 방법
KR20120026789A (ko) * 2010-09-10 2012-03-20 삼성전자주식회사 무선 전력 전송 장치, 무선 충전 장치 및 이를 이용한 무선 충전 시스템
KR20130083660A (ko) * 2012-01-13 2013-07-23 삼성전기주식회사 무선전력 전송 장치 및 방법
KR20140093318A (ko) * 2013-01-14 2014-07-28 삼성전자주식회사 상호 공진을 이용하는 전력 전송 및 데이터 송수신 장치, 상호 공진을 이용하는 전력 수신 및 데이터 송수신 장치 및 이의 방법
KR20150014180A (ko) * 2013-07-29 2015-02-06 삼성전기주식회사 무선 충전 장치 및 그 제어방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080038683A (ko) * 2006-10-30 2008-05-07 엘지전자 주식회사 무선 전원 공급 장치 및 그 방법
KR20120026789A (ko) * 2010-09-10 2012-03-20 삼성전자주식회사 무선 전력 전송 장치, 무선 충전 장치 및 이를 이용한 무선 충전 시스템
KR20130083660A (ko) * 2012-01-13 2013-07-23 삼성전기주식회사 무선전력 전송 장치 및 방법
KR20140093318A (ko) * 2013-01-14 2014-07-28 삼성전자주식회사 상호 공진을 이용하는 전력 전송 및 데이터 송수신 장치, 상호 공진을 이용하는 전력 수신 및 데이터 송수신 장치 및 이의 방법
KR20150014180A (ko) * 2013-07-29 2015-02-06 삼성전기주식회사 무선 충전 장치 및 그 제어방법

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018203608A1 (fr) * 2017-05-02 2018-11-08 Samsung Electronics Co., Ltd. Appareil de transmission d'électricité sans fil qui est désactivé dans un état de veille et appareil électronique comprenant un appareil de transmission d'électricité sans fil
US10714978B2 (en) 2017-05-02 2020-07-14 Samsung Electronics Co., Ltd. Wireless power transmission apparatus that is turned off in standby state and electronic apparatus including wireless power transmission apparatus
FR3077738A1 (fr) * 2018-02-09 2019-08-16 Orion Biotech Inc. Structure d'amplification de charge sans fil à longue portée pour dispositifs médicaux implantables

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