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1. 发明公开

EP4113173A2 FOREIGN OBJECT DETECTION METHOD AND APPARATUS, AND WIRELESS CHARGING SYSTEM 审中-实审
公开(公告)号：EP4113173A2
公开(公告)日：2023-01-04
申请号：EP22181417.1
申请日：2022-06-28
申请人： Huawei Technologies Co., Ltd.
发明人： TANG, Chunsen , WANG, Zhihui , WANG, Yaoyi , BAI, Pengfei , WANG, Zhenzhen , CAO, Jiakai , KUANG, Wei , WU, Zhixian
IPC分类号： G01V3/10 , H02J50/60
摘要： This application provides a foreign object detection method and apparatus, and a wireless charging system. The foreign object detection apparatus includes a coil array and a foreign object detection circuit. The coil array includes at least one coil group, and each coil group includes four detection coils whose locations are symmetrical to each other. The foreign object detection circuit may obtain an induction signal generated by each detection coil; determine an abnormal-value threshold of each coil group based on induction signals that are of each coil group and that are obtained in a first time period, and detect, based on the abnormal-value threshold and the induction signals of each coil group, whether there is a foreign object; when it is determined that there is no foreign object, determine a signal threshold of each coil group based on the induction signals of each coil group; and detect, based on the signal threshold of each coil group and induction signals that are of each coil group and that are obtained in a second time period, whether there is a foreign object. The technical solutions provided in this application may improve wireless charging safety.

2. 发明公开

EP3552859A1 WIRELESS CHARGING METHOD, DEVICE, AND SYSTEM FOR ELECTRIC VEHICLE 审中-公开
公开(公告)号：EP3552859A1
公开(公告)日：2019-10-16
申请号：EP17888404.5
申请日：2017-08-14
申请人： Huawei Technologies Co., Ltd.
发明人： LI, Yingtao , WANG, Pinghua , WU, Zhixian
IPC分类号： B60L11/18 , H02J7/00 , H01M10/44
摘要： The present invention relates to the field of automotive technologies, and provides an electric vehicle wireless charging method, an apparatus, and a system. A wireless charging station (101) can charge an electric vehicle (100) according to a charging request of the electric vehicle (100) and charging permission of the electric vehicle (100) prestored on the wireless charging station (101), so that resources of the wireless charging station (101) are maximally used, and resource waste of the wireless charging station (101) is avoided. The electric vehicle (100) wireless charging method includes: receiving, by a wireless charging station (101), a charging request sent by the electric vehicle (100), where the charging request is used to request the wireless charging station (101) to wirelessly charge the electric vehicle (100) (S105); determining, by the wireless charging station (101), that the charging request matches charging permission of the electric vehicle (100) prestored on the wireless charging station (101) (S106); obtaining, by the wireless charging station (101) according to the charging request, a charging configuration parameter corresponding to the charging request (S107); and wirelessly charging, by the wireless charging station (101), the electric vehicle (100) based on the charging configuration parameter (S108).

3. 发明公开

EP4054053A1 WIRELESS CHARGING RECEIVING END, SYSTEM AND CONTROL METHOD 审中-公开
公开(公告)号：EP4054053A1
公开(公告)日：2022-09-07
申请号：EP20880969.9
申请日：2020-05-21
申请人： Huawei Technologies Co., Ltd.
发明人： MAO, Yunhe , WU, Zhixian , LIU, Yanding
IPC分类号： H02J50/00
摘要： This application discloses a wireless charging receiver (1000a), system, and control method, and relates to the field of wireless charging technologies. A receiver coil (Ls) of the receiver (1000a) converts an alternating magnetic field transmitted by a transmitter (1001a) to an alternating current, and delivers the alternating current to a compensation network (200). The compensation network (200) compensates the alternating current, and then delivers the compensated alternating current to a rectifier (H2). The rectifier (H2) rectifies the compensated alternating current to a direct current, and supplies the direct current to a load. The compensation network (200) is a compensation circuit with a current source characteristic, so that the receiver coil (Ls) and the compensation network (200), acting together with the transmitter (1001a), make an input end of the rectifier (H2) a constant current source. During turn-on of the receiver (1000a), a receiver controller (201) controls a switching tube in the rectifier (H2) to be closed, so that the load is bypassed; and then the receiver controller (201) controls the receiver (1000a) to start working. Alternatively, during turn-off of the receiver (1000a), the receiver controller (201) controls a switching tube of the rectifier (H2) to be closed, so that the load is bypassed; and then the receiver controller (201) controls the receiver (1000a) to enter an off state. With the receiver (1000a), the receiver (1000a) and the load can be protected from damage during turn-on or turn-off of the receiver (1000a), thereby improving safety of a wireless charging system.

4. 发明公开

EP4050758A1 WIRELESS CHARGING RECEIVER, SYSTEM AND CONTROL METHOD 审中-公开
公开(公告)号：EP4050758A1
公开(公告)日：2022-08-31
申请号：EP20881193.5
申请日：2020-10-29
申请人： Huawei Technologies Co., Ltd.
发明人： MAO, Yunhe , WU, Zhixian
IPC分类号： H02J50/70 , H02J50/10 , B60L53/12 , H02J7/02
摘要： This application provides a wireless charging receive end, system, and control method, and relates to the field of wireless charging technologies. The wireless charging receive end includes a receiver coil, a compensation network, a power converter, and a receive end controller. The receiver coil converts an alternating magnetic field transmitted by a transmit end into an alternating current and transmits the alternating current to the compensation network. The compensation network compensates for the alternating current and then transmit a compensated alternating current to the power converter. The power converter rectifies the compensated alternating current into a direct current for charging a load. The receive end controller obtains a reference signal at the transmit end based on an input current of the power converter and an input reference current, and sends the reference signal at the transmit end to a transmit end controller, so that the transmit end controller controls the transmit end based on the reference signal at the transmit end. Because the receive end controls the input current of the power converter at the receive end, the input current of the power converter at the receive end can be prevented from overcurrent, to protect the power converter at the receive end, and improve reliability of the wireless charging system.

5. 发明公开

EP3799287A1 PHASE CALIBRATION CIRCUIT AND METHOD FOR RECEIVING END, AND RECEIVING END 有权
公开(公告)号：EP3799287A1
公开(公告)日：2021-03-31
申请号：EP19897695.3
申请日：2019-09-24
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： MAO, Yunhe , WU, Zhixian , ZENG, Xiaosheng
IPC分类号： H02M3/335 , H02J50/10 , B60L53/12
摘要： This application discloses a phase alignment circuit and method of a receive end, and a receive end, where the phase alignment circuit and method of a receive end, and the receive end are applied to an electric vehicle. The receive end is located on the electric vehicle. The circuit includes: a phase measurement circuit and a controller. A first input end of the phase measurement circuit is connected to an output end of a current detection circuit, and a second input end of the phase measurement circuit is connected to an output end of a filter. The current detection circuit is configured to detect an input current of a rectifier. The filter is configured to filter the input current to obtain an input current fundamental component. The phase measurement circuit is configured to obtain a difference between a phase of the input current and a phase of the input current fundamental component. The controller is configured to: use, as an actual phase shift angle, a result obtained by subtracting the phase difference from a preset phase shift angle, and control a phase of a bridge arm voltage of the rectifier to lag behind the phase of the input current fundamental component by the actual phase shift angle. The controller outputs a drive signal for a controllable switching transistor of the rectifier by using the actual phase shift angle. Because a lagging phase caused due to filtering is compensated for, precision of synchronization between the bridge arm voltage and the input current can be increased.

6. 发明公开

EP4113173A3 FOREIGN OBJECT DETECTION METHOD AND APPARATUS, AND WIRELESS CHARGING SYSTEM 审中-实审
公开(公告)号：EP4113173A3
公开(公告)日：2023-03-29
申请号：EP22181417.1
申请日：2022-06-28
申请人： Huawei Technologies Co., Ltd.
发明人： TANG, Chunsen , WANG, Zhihui , WANG, Yaoyi , BAI, Pengfei , WANG, Zhenzhen , CAO, Jiakai , KUANG, Wei , WU, Zhixian
IPC分类号： G01V3/10 , H02J50/60
摘要： This application provides a foreign object detection method and apparatus, and a wireless charging system. The foreign object detection apparatus includes a coil array and a foreign object detection circuit. The coil array includes at least one coil group, and each coil group includes four detection coils whose locations are symmetrical to each other. The foreign object detection circuit may obtain an induction signal generated by each detection coil; determine an abnormal-value threshold of each coil group based on induction signals that are of each coil group and that are obtained in a first time period, and detect, based on the abnormal-value threshold and the induction signals of each coil group, whether there is a foreign object; when it is determined that there is no foreign object, determine a signal threshold of each coil group based on the induction signals of each coil group; and detect, based on the signal threshold of each coil group and induction signals that are of each coil group and that are obtained in a second time period, whether there is a foreign object. The technical solutions provided in this application may improve wireless charging safety.

7. 发明公开

EP4166375A1 LOW FREQUENCY MAGNETIC FIELD-BASED POSITIONING SYSTEM AND METHOD, AND DEVICES 审中-实审
公开(公告)号：EP4166375A1
公开(公告)日：2023-04-19
申请号：EP21841759.0
申请日：2021-07-12
申请人： Huawei Technologies Co., Ltd.
发明人： YOU, Hongcheng , ZENG, Xiaosheng , MAO, Yunhe , WU, Zhixian , CHEN, Shuangquan , LIU, Yanding
IPC分类号： B60L53/12 , B60L53/38
摘要： This application provides a positioning system based on a low frequency magnetic field. The positioning system includes a low frequency magnetic field transmit apparatus and a low frequency magnetic field receive apparatus. The low frequency magnetic field transmit apparatus includes a low frequency magnetic field transmit coil, a conflict detect coil, and a magnetic field generation detection control module. The low frequency magnetic field receive apparatus includes a low frequency magnetic field receive coil and a magnetic field detection control module. The conflict detect coil is configured to sense a low frequency magnetic field signal. The magnetic field generation detection control module is configured to: when the conflict detect coil does not sense the low frequency magnetic field signal, control the low frequency magnetic field transmit coil to transmit a first low frequency magnetic field signal. The magnetic field detection control module is configured to: when it is determined that the low frequency magnetic field signal received by the low frequency magnetic field receive coil is the first low frequency magnetic field signal, determine relative positions of the low frequency magnetic field transmit coil and the low frequency magnetic field receive coil based on signal strength of the first low frequency magnetic field signal. According to this application, positioning accuracy of a low frequency magnetic field transmit coil and a low frequency magnetic field receive coil is improved, and applicability is high.

8. 发明公开

EP4144574A1 WIRELESS CHARGING RECEIVING END AND TRANSMITTING END, SYSTEM, CONTROL METHOD AND ELECTRIC VEHICLE 审中-实审
公开(公告)号：EP4144574A1
公开(公告)日：2023-03-08
申请号：EP21809600.6
申请日：2021-01-07
申请人： Huawei Technologies Co., Ltd.
发明人： ZENG, Xiaosheng , YOU, Hongcheng , MAO, Yunhe , WU, Zhixian , CHEN, Shuangquan
IPC分类号： B60L53/38 , H02J50/12
摘要： This application discloses a wireless charging receiver, transmitter, system, and control method, and an electric vehicle, and relates to the field of wireless charging technologies. A low-frequency magnetic field receive coil of the receiver converts a low-frequency magnetic field into an induced signal. A receiver controller is configured to: when all low-frequency magnetic field transmit coils stop working, allocate a signal feature different from that of a current induced signal to each low-frequency magnetic field transmit coil, and send a correspondence between each low-frequency magnetic field transmit coil and the allocated signal feature to the wireless charging transmitter; and is further configured to determine, when the low-frequency magnetic field transmit coil works, relative positions of the power transmit coil and the power receive coil by using an induced signal having the allocated signal feature. A transmitter controller controls an inverter circuit based on the correspondence to enable each low-frequency magnetic field transmit coil to work. Mutual interference between low-frequency magnetic field signals of adjacent parking spaces can be avoided by using the foregoing receiver and transmitter.

9. 发明公开

EP3866303A1 WIRELESS CHARGING RECEIVING APPARATUS, METHOD, TERMINAL, AND SYSTEM 有权
公开(公告)号：EP3866303A1
公开(公告)日：2021-08-18
申请号：EP18939040.4
申请日：2018-10-31
申请人： Huawei Technologies Co., Ltd.
发明人： MAO, Yunhe , WU, Zhixian , ZENG, Xiaosheng , LIU, Yanding
IPC分类号： H02J50/00
摘要： This application provides a wireless charging receiving apparatus, a method, a terminal, and a system. The receiving apparatus includes a receiver coil, a rectifier, and a controller. The receiver coil is configured to receive electromagnetic energy transmitted by a transmitter coil and output an alternating current. The rectifier includes at least two controllable switches, and is configured to rectify the alternating current from the receiver coil to a direct current by using the at least two controllable switches. The controller is configured to perform phase-locking on a phase of a current fundamental component of the alternating current received by the rectifier, to obtain a periodic signal having a same frequency as the current fundamental component; and the controller is further configured to: generate a synchronization reference signal having the same frequency as the periodic signal, generate drive signals of the controllable switches in the rectifier based on the synchronization reference signal, and control, based on the drive signals, the controllable switches in the rectifier to convert the alternating current into the direct current, where the drive signals and the current fundamental component have the same frequency. After the phase-locking, a period of the synchronization reference signal does not change due to a sudden change of load, and frequencies of the drive signals do not jump, so that the entire wireless charging system works in a steady state.

10. 发明公开

EP3799259A1 APPARATUS, DEVICE AND METHOD FOR DETECTING METAL FOREIGN MATTER IN WIRELESS CHARGING SYSTEM 有权
公开(公告)号：EP3799259A1
公开(公告)日：2021-03-31
申请号：EP19826304.8
申请日：2019-05-23
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： MAO, Yunhe , WU, Zhixian , LIU, Yanding , XIAO, Furong
IPC分类号： H02J50/12 , H02J50/60
摘要： An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module is configured to: adjust a frequency of a first signal based on a difference between a phase of the first signal that is output by the phase-lock control module and a phase of a third signal that is collected by the signal collection module, and output the first signal to the excitation module and the determining module, where a difference between a phase of the frequency-adjusted first signal and the phase of the third signal is less than a first specified value. The excitation module is configured to: generate a second signal based on the first signal, and output the second signal to the resonance module. The resonance module is configured to output the third signal to the signal collection module under excitation of the second signal by using a resonant circuit including a target coil and a target capacitor. The determining module is configured to determine, based on the signal that is output by the phase-lock control module and a pre-stored fourth signal, whether there is a metal foreign matter in an area of the target coil.

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