公开(公告)号：US11990774B2

公开(公告)日：2024-05-21

申请号：US18156173

申请日：2023-01-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xujun Liu ,  Ce Liu ,  Yanding Liu ,  Jinbo Ma ,  Pinghua Wang

IPC: H02J7/00 ,  G01R31/36 ,  H01M10/42

CPC classification number: H02J7/00 ,  G01R31/3648 ,  H02J7/0042 ,  H02J7/00712 ,  H02J7/007184 ,  H01M10/4257 ,  H02J7/00034

Abstract: A terminal and a fast charging method to fast charge the terminal, where the method includes: sending, by the terminal, instruction information to a charger connected to the terminal in order to instruct the charger to adjust an output voltage and an output current; converting, by the terminal, the output voltage of the charger into 1/K times the output voltage; and converting the output current of the charger into K times the output current such that a charging circuit between two sides of a battery charges the battery with the 1/K times the output voltage and the K times the output current, where K is a conversion coefficient of a conversion circuit with a fixed conversion ratio in the terminal and is a constant value, and K is any real number greater than one.

公开(公告)号：US20210249889A1

公开(公告)日：2021-08-12

申请号：US17244017

申请日：2021-04-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yunhe Mao ,  Zhixian Wu ,  Xiaosheng Zeng ,  Yanding Liu

IPC: H02J7/02 ,  H02J50/12 ,  H02J50/80 ,  H03L7/085 ,  H03L7/099 ,  B60L53/12

Abstract: A wireless charging receiving apparatus is provided, which includes a receiver coil, a rectifier, and a controller. The receiver coil is configured to receive electromagnetic energy 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 s. 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, controllable switches in the rectifier to convert the alternating current into the direct current.

公开(公告)号：US20210119494A1

公开(公告)日：2021-04-22

申请号：US17134084

申请日：2020-12-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunhe Mao ,  Zhixian Wu ,  Yanding Liu ,  Furong Xiao

IPC: H02J50/60 ,  H02J50/12

Abstract: 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 and output the first signal to the excitation module and the determining module. 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. The determining module is configured to determine whether there is a metal foreign matter in an area of the target coil.

公开(公告)号：US20200343756A1

公开(公告)日：2020-10-29

申请号：US16924509

申请日：2020-07-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xujun Liu ,  Ce Liu ,  Yanding Liu ,  Jinbo Ma ,  Pinghua Wang

IPC: H02J7/00 ,  G01R31/36 ,  H01M10/42

Abstract: A terminal and a fast charging method includes sending, by the terminal, instruction information to a charger connected to the terminal in order to instruct the charger to adjust an output voltage and an output current, converting, by the terminal, the output voltage of the charger into 1/K times the output voltage, and converting the output current of the charger into K times the output current such that a charging circuit between two sides of a battery charges the battery with the 1/K times the output voltage and the K times the output current, where K is a conversion coefficient of a conversion circuit with a fixed conversion ratio in the terminal and is a constant value, and K is any real number greater than one.

公开(公告)号：US20190222041A1

公开(公告)日：2019-07-18

申请号：US16359451

申请日：2019-03-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xinyu Liu ,  Yanding Liu ,  Ce Liu ,  Pinghua Wang ,  Jinbo Ma

IPC: H02J7/00

Abstract: A charging circuit in a terminal, or a charging system, is respectively coupled to a charger, a terminal load, and a battery. The charging circuit includes a first adjustment circuit, a current detection circuit, a voltage detection circuit, and a control circuit. A first end of the first adjustment circuit is coupled to the charger, a second end of the first adjustment circuit is further coupled to the terminal load, a third end of the first adjustment circuit is coupled to the control circuit, and a second end of the current detection circuit is coupled to a positive electrode of the battery.