公开(公告)号：US20240106274A1

公开(公告)日：2024-03-28

申请号：US18263872

申请日：2021-12-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shuai Zheng ,  Gang Ye ,  Qinghui Hou

IPC: H02J50/12 ,  H02J7/04 ,  H02J50/80

CPC classification number: H02J50/12 ,  H02J7/04 ,  H02J50/80

Abstract: An electronic device is provided, which includes a receive coil, a wireless electric energy receiver, a three-level buck circuit, a battery, and a receive end controller. A charging control method is also provided that includes: obtaining a battery voltage, and sending a first control signal and a second control signal based on the battery voltage. The wireless electric energy receiver converts, based on the first control signal, an alternating current generated by the receive coil through induction into a direct current, and outputs a first voltage, V1, to charge the battery in a first voltage mode. The three-level buck circuit bucks an output voltage of the wireless electric energy receiver based on the second control signal, and then outputs a voltage to the battery.

公开(公告)号：US10903742B2

公开(公告)日：2021-01-26

申请号：US16851423

申请日：2020-04-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qinghui Hou ,  Cheng Yang

IPC: H02M3/07 ,  H02M3/158 ,  H02M3/137

Abstract: This application provides a switched-capacitor converter circuit, a charging control system, and a control method. In the switched-capacitor converter circuit, input terminals of N levels of switched-capacitor converter units are sequentially connected in series, and output terminals of the N levels of switched-capacitor converter units are connected in parallel, to obtain a first power supply branch to supply power to a load. In addition, a first capacitor acts as a second power supply branch to supply power to the load, and the first power supply branch and the second power supply branch transmit power in parallel. In comparison with a serial power transmission manner, there are fewer devices on a power transmission path when a parallel power transmission manner is used. Therefore, this can reduce power losses on the transmission path, and improve transmission efficiency of the switched converter circuit.

公开(公告)号：US20250125721A1

公开(公告)日：2025-04-17

申请号：US18834567

申请日：2022-12-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  Nanjing University of Aeronautics and Astronautics

Inventor： Xinbo Ruan ,  Gang Ye ,  Kai Yao ,  Fanguang Shao ,  Qinghui Hou

IPC: H02M3/07

Abstract: This application provides a switched capacitor circuit SC and an electronic device. In the SC, when the SC circuit works in different voltage step-down modes, voltage step-down is separately performed in a ratio of 4:1, 2:1, and 1:1 on a voltage at an input end and then a voltage is output at the two ends of the fourth capacitor Co to implement switching of a plurality of voltage step-down ratios.

公开(公告)号：US20230095625A1

公开(公告)日：2023-03-30

申请号：US17909104

申请日：2021-03-02

Applicant: HUawei Technologies Co., Ltd.

Inventor： Liangjin Chen ,  Qinghui Hou

IPC: H02J7/00

Abstract: The present disclosure provides a charging method, device, and system. The charging device includes a voltage regulation circuit, and can charge a charged device through voltage step-down or voltage step-up. In addition, the charging device and a charged device can transfer statuses of a circuit and a battery through a change of a switch status, so that the charging device can regulate a charging voltage and/or a charging current based on the statuses of the circuit and the battery.