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：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.