WO2021022862A1 - Dispositif de réception de charge sans fil et terminal mobile - Google Patents

Dispositif de réception de charge sans fil et terminal mobile Download PDF

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Publication number
WO2021022862A1
WO2021022862A1 PCT/CN2020/090224 CN2020090224W WO2021022862A1 WO 2021022862 A1 WO2021022862 A1 WO 2021022862A1 CN 2020090224 W CN2020090224 W CN 2020090224W WO 2021022862 A1 WO2021022862 A1 WO 2021022862A1
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WO
WIPO (PCT)
Prior art keywords
voltage
output
unit
response
charging
Prior art date
Application number
PCT/CN2020/090224
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English (en)
Chinese (zh)
Inventor
陈涛
Original Assignee
中兴通讯股份有限公司
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Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2021022862A1 publication Critical patent/WO2021022862A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • 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
    • 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
    • H02J7/04—Regulation of charging current or voltage

Definitions

  • the embodiments of the present disclosure relate to the technical field of terminal equipment charging, and in particular to a wireless charging receiving device and a mobile terminal.
  • wireless charging In addition to being a consumer electronic accessory, wireless charging has successfully gained consumers' favor, but it has not yet reached the expected level when a large number of this technology has been adopted to become the mainstream of the market.
  • One of the main reasons for this is the low efficiency of wireless charging and slow charging speed.
  • the main certification bodies for wireless charging can only perform certifications below 5W, including the well-known Tyre laboratory in China, which can complete wireless charging certifications less than 5W, and all terminal manufacturers can pass the certification to ensure charging
  • the stability of the charging current is often set very low, generally only a few hundred mA. But for most terminal products, as the battery capacity increases, a few hundred milliamps of charging cannot meet user needs at all. For a 3000mAH battery, it takes 5 hours to fully charge a battery, which seriously affects user experience.
  • the Wireless Power Consortium has formulated a new medium-power wireless charging standard, which supports a maximum of 15W charging and a maximum output current of 3A.
  • the output current during wireless charging can easily cause voltage sag under heavy load, leading to premature limitation of the charging current to a lower level. 2. When the load changes quickly, it will also cause a voltage drop; 3. Because the transmitting end and the receiving end modulate the current by sending data packets, for some chargers with lower coupling efficiency, the amplitude of the modulation current will become larger. Corresponding ripples will also become larger, and it is very easy to trigger automatic input current limit (Auto Input Current Limited, AICL) or under voltage lock (Under Voltage Lock Out, UVLO), etc. The final result leads to problems such as foreign object detection (FOD), compatibility test failure, slow charging, and charging cut-off in the wireless charging (QI) certification test.
  • FOD foreign object detection
  • QI charging cut-off in the wireless charging
  • the embodiments herein provide a wireless charging receiving device and a mobile terminal.
  • an embodiment of this document provides a wireless charging receiving device, including: a voltage processing module; the input terminal of the voltage processing module is connected to the output terminal of the charging conversion module, and the output terminal of the voltage processing module is connected to the charging The management module is connected; wherein the voltage processing module detects the output voltage of the output terminal of the charging conversion module, and when it is determined that the output voltage has a voltage drop, the voltage processing module performs boost processing on the output voltage.
  • the embodiments herein provide a wireless charging receiving device, including: a voltage processing module; the voltage processing module is connected to the output point of the response voltage of the charging conversion module; wherein the voltage processing module detects the charging conversion The response voltage of the output point of the module, when it is determined that the response voltage is lower than the set threshold, the voltage processing module performs boost processing on the response voltage.
  • an embodiment of the present invention provides a mobile terminal, including: the wireless charging receiving device according to any one of the foregoing first aspects.
  • an embodiment of the present invention provides a mobile terminal, including: the wireless charging receiving device according to any one of the second aspects.
  • FIG. 1 is a schematic structural diagram of a first wireless charging receiving device provided by an embodiment of this document;
  • FIG. 2 is a schematic structural diagram of a second wireless charging receiving device provided by an embodiment of this document;
  • FIG. 3 is a schematic structural diagram of a third wireless charging receiving device provided by an embodiment of this document.
  • FIG. 4 is a schematic structural diagram of a fourth wireless charging receiving device provided by an embodiment of this document.
  • FIG. 5 is a schematic structural diagram of a first mobile terminal provided by an embodiment of this document.
  • Fig. 6 is a schematic structural diagram of a second type of mobile terminal provided by an embodiment of this document.
  • FIG. 1 is a schematic structural diagram of the first wireless charging receiving device provided by the embodiments of this document.
  • the wireless charging receiving device 10 specifically includes: a charging receiving coil 11, a charging conversion module 12, a voltage processing module 13, a load The switch 14 and the charging management module 15; the charging receiving coil 11 is connected to the input terminal of the charging conversion module 12, the output terminal of the charging conversion module 12 is connected to the input terminal of the voltage processing module 13, and the voltage The output terminal of the processing module 13 is connected to the charging management module 15 through the load switch 14; wherein, the voltage processing module 13 detects the output voltage of the output terminal of the charging conversion module 12, and when it is determined that the output voltage generates a voltage When it falls, the voltage processing module 13 performs boost processing on the output voltage.
  • the wireless charging receiving device may be a mobile terminal, the charging receiving coil 11 may be a wireless charging receiving coil, and the wireless charging receiving coil may be wound with copper wire or a flexible printed circuit (FPC).
  • the charging base is coupled to receive high-frequency electromagnetic waves generated by the wireless charging base, and convert the high-frequency electromagnetic waves into AC electromagnetic induction signals.
  • the charging conversion module 12 converts the AC electromagnetic induction signal into a DC signal for output.
  • the voltage of several segments of the charging conversion module can be: 5V, 9V or 12V DC voltage signal.
  • a matching capacitor may be provided between the charging receiving coil 11 and the charging conversion module 12, and the purpose of the matching capacitor is to prevent LC oscillation.
  • the voltage processing module 13 specifically includes: a voltage response unit 131, an anti-backflow unit 132, a comparator 133, and a boost unit 134
  • the input terminal of the voltage response unit 131 is connected to the output terminal of the charging conversion module 12
  • the output terminal of the voltage response unit 131 is connected to the input terminal of the anti-backflow unit 132
  • the anti-backflow unit The output terminal of 132 is connected to the load switch 14;
  • the two input terminals of the comparator 133 are respectively connected to the input terminal and the output terminal of the voltage response unit 131, and the output terminal of the comparator 133 is connected to the booster
  • the control input end of the voltage boosting unit 134 is connected; the voltage input end of the boosting unit 134 is connected to the input end of the anti-backflow unit 132, and the voltage output end of the boosting unit 134 is connected to the output of the anti-backflow unit 132 ⁇ End connection.
  • the comparator 133 obtains the input voltage of the input terminal of the voltage response unit 131 and the output voltage of the output terminal of the voltage response unit 131 through two input terminals; the comparator 133 compares the input voltage with The size of the output voltage; if the input voltage is less than the output voltage, it is determined that the voltage output by the charging conversion module 12 has a voltage drop to generate a boost command, and the boost command is sent to the boost Unit 134.
  • the boosting unit 134 boosts the output voltage of the voltage response unit 131 according to the received boosting instruction, and outputs the boosted voltage from the voltage input terminal of the boosting unit to the The charging management module.
  • the charging management module stops the increase of the charging current and stabilizes the charging current before the voltage drop.
  • the voltage at the input of the voltage response unit is V1
  • the voltage at the input of the voltage response unit is V2.
  • the comparator obtains the voltage values of V1 and V2 and compares the magnitudes of V1 and V2.
  • V1 ⁇ V2 the output of the charging conversion module is determined
  • the output terminal of the comparator outputs 1 to the control input terminal of the boost unit (1 represents a boost command)
  • the boost unit performs boost processing
  • the boosted voltage is changed from the The voltage input terminal of the boost unit is output to the charging management module through the load switch.
  • the anti-backflow unit 132 may be a diode VD, which aims to prevent the boosted voltage output from the output terminal of the boosting unit from flowing back to the voltage response unit.
  • the charging management module 15 supplies power to the comparator 133 and the boosting unit 134, so that the comparator and the boosting unit work at a stable voltage.
  • FIG. 3 is a schematic structural diagram of a third wireless charging receiving device provided by an embodiment of this document.
  • the wireless charging receiving device 30 specifically includes: a charging receiving coil 31, a charging conversion module 32, a voltage processing module 33, a load The switch 34 and the charging management module 35; the charging receiving coil 31 is connected to the input end of the charging conversion module 32, and the output end of the charging conversion module 32 is connected to the charging management module 35 through the load switch 34;
  • the conversion module 32 is also provided with an output point, the output point (VRECT) is connected to the output terminal (VOUT) of the charging conversion module 32, the output point outputs a response voltage, and the response voltage passes through a low dropout linear regulator ( Low Dropout Regulator (LDO) or high and low voltage DC conversion (Direct Current, DCDC) is output from the output terminal of the charging conversion module 32.
  • LDO Low Dropout Regulator
  • DCDC Direct Current
  • the voltage processing module 33 detects the response voltage of the output point of the charging conversion module 32, and when it is determined that the response voltage is lower than a set threshold, the voltage processing module 33 performs a boost process on the response voltage .
  • the voltage processing module 33 specifically includes: a comparator 331 and a boosting unit 332; the charging conversion module 32 is provided with In response to the voltage output point (VRECT), the input terminal of the comparator 331 is connected to the output point in the charging conversion module 32, and the output terminal of the comparator 331 is connected to the control input terminal (EN ) Connection, the voltage output terminal (OUT) of the boost unit 332 is connected to the output point (VRECT) of the response voltage of the charging conversion module.
  • the comparator 331 obtains the response voltage of the output point in the charging conversion module 32; the comparator 331 compares the response voltage with the set threshold; if the response voltage is less than The set threshold value determines that the response voltage of the charging conversion module 32 has a voltage drop, generates a boost command, and sends the boost command to the boost unit.
  • the boosting unit 332 boosts the response voltage output by the response voltage output point of the charging conversion module 32 according to the boosting instruction, and transfers the boosted response voltage to the boosting unit 332.
  • the voltage output terminal outputs to the response voltage output point of the charging conversion module 32.
  • the set threshold can be set according to the charging characteristics of the terminal device. For example, if the minimum voltage value of the output voltage VOUT drops during one or several drops, the threshold is set to the current VRECT+VOUT- The minimum voltage at which VOUT drops.
  • the response voltage output by the output point of the charging conversion module is V
  • the comparator compares the response voltage with the set threshold (V').
  • V the voltage output by the charging conversion module is determined
  • the output of the comparator outputs 1 to the control input of the boost unit (1 represents a boost command)
  • the boost unit performs boost processing
  • the response voltage after the boost processing is changed from the boost
  • the voltage output terminal of the unit is output to the heating response voltage output point of the charging conversion module.
  • the output terminal of the comparator outputs 0 to the control input terminal of the boost unit (0 represents a command that the boost unit does not work). At this time, the boost unit does not work.
  • the charging management module 35 supplies power to the comparator 331 and the boosting unit 332, so that the comparator and the boosting unit work at a stable voltage.
  • the charging management module can be used gradually based on the current output current level Stage increases the output current to match the output current of the wireless charging receiving device with the charging current of the terminal device (for example, the current output current of the wireless charging receiving device is 1A, and the charging current of the terminal device is 1.5A, and the charging management module will output the current Adjust from 1A to 1.5A).
  • the current output current can be controlled at the current level through the charging management module (for example, when the output current is 1.2A, the output voltage of the output terminal of the charging conversion module is again In the event of a drop, the charging management module will control the current output current at 1.2A and no longer increase).
  • the magnitude and number of voltage drops can be set according to actual conditions, which is not specifically limited in this embodiment.
  • a charging processing module is added to the wireless charging receiving device, and a comparator is used to determine whether the output voltage of the charging conversion module has dropped. If there is a voltage drop, the boost unit is used to boost Processing, so that the voltage input to the charging management module does not drop, and the charging current is increased step by step to ensure that the charging current matches the terminal and improve the charging efficiency.
  • FIG. 5 is a schematic diagram of the structure of the first mobile terminal provided by the embodiments of this document.
  • the mobile terminal 100 specifically includes: a wireless charging receiving device 10 and a battery 16; the wireless charging receiving device 10 and the battery shown in FIG.
  • the wireless charging receiving device is similar.
  • the charging management module 15 in the wireless charging receiving device 10 is connected to the battery 16, and the battery 16 is charged through the charging management module 15.
  • the battery 16 may be a lithium battery.
  • FIG. 6 is a schematic structural diagram of a second type of mobile terminal provided by an embodiment of this document.
  • the mobile terminal 300 specifically includes: a wireless charging receiving device 30 and a battery 36; a wireless charging receiving device 30 and a battery shown in FIG.
  • the wireless charging receiving device is similar.
  • the charging management module 35 in the wireless charging receiving device 30 is connected to the battery 36, and the battery 36 is charged through the charging management module 35.
  • the battery 36 may be a lithium battery.
  • the steps of the method or algorithm described in combination with the embodiments disclosed in this document can be implemented by hardware, a software module executed by a processor, or a combination of the two.
  • the software module can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or all areas in the technical field. Any other known storage medium.
  • a charging processing module is added to the wireless charging receiving device, and a comparator is used to determine whether the output voltage of the charging conversion module has dropped. If there is a voltage drop, the boost unit is used to boost Processing, so that the voltage input to the charging management module does not drop, and the charging current is increased step by step to ensure that the charging current matches the terminal and improve the charging efficiency.

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

Abstract

L'invention concerne un dispositif de réception de charge sans fil (10) et un terminal mobile (100, 300). Le dispositif de réception de charge sans fil (10) comprend : un module de traitement de tension (13) ayant sa borne d'entrée connectée à une borne de sortie d'un module de conversion de charge (12) et sa borne de sortie connectée à un module de gestion de charge (15). Le module de traitement de tension (13) sert à mesurer la tension de sortie de la borne de sortie du module de conversion de charge (12), et lorsqu' il est déterminé qu'une chute de tension s'est produite dans la tension de sortie, le module de traitement de tension (13) amplifie la tension de sortie. Un module de traitement de charge est ajouté au récepteur de charge sans fil (10), et un comparateur (133, 331) détermine si une chute s'est produite dans la tension de sortie du module de conversion de charge (12), et si tel est le cas, la tension de sortie est augmentée au moyen d'une unité d'amplification (134, 332).
PCT/CN2020/090224 2019-08-05 2020-05-14 Dispositif de réception de charge sans fil et terminal mobile WO2021022862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910737634.8A CN112332502A (zh) 2019-08-05 2019-08-05 无线充电接收装置及移动终端
CN201910737634.8 2019-08-05

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WO2021022862A1 true WO2021022862A1 (fr) 2021-02-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104113119A (zh) * 2014-07-29 2014-10-22 Tcl通讯（宁波）有限公司 一种利用nfc天线给无线穿戴设备充电的充电装置
CN105379137A (zh) * 2014-01-08 2016-03-02 联发科技（新加坡）私人有限公司 具有可编程电源路径的无线电源接收器
WO2017078543A1 (fr) * 2015-11-02 2017-05-11 Powerbyproxi Limited Récepteur de puissance inductive
US20170373525A1 (en) * 2016-06-24 2017-12-28 Samsung Electronics Co., Ltd. Voltage generating method and apparatus
WO2018107629A1 (fr) * 2016-12-14 2018-06-21 成都市易冲无线科技有限公司 Système résonant de charge sans fil et procédé de charge pour brosse à dents électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105379137A (zh) * 2014-01-08 2016-03-02 联发科技（新加坡）私人有限公司 具有可编程电源路径的无线电源接收器
CN104113119A (zh) * 2014-07-29 2014-10-22 Tcl通讯（宁波）有限公司 一种利用nfc天线给无线穿戴设备充电的充电装置
WO2017078543A1 (fr) * 2015-11-02 2017-05-11 Powerbyproxi Limited Récepteur de puissance inductive
US20170373525A1 (en) * 2016-06-24 2017-12-28 Samsung Electronics Co., Ltd. Voltage generating method and apparatus
WO2018107629A1 (fr) * 2016-12-14 2018-06-21 成都市易冲无线科技有限公司 Système résonant de charge sans fil et procédé de charge pour brosse à dents électrique

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