公开(公告)号：US20220294236A1

公开(公告)日：2022-09-15

申请号：US17692409

申请日：2022-03-11

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jungik HA ,  Sangwon LEE

IPC: H02J7/00 ,  H02J7/34 ,  H01M10/42

Abstract: A battery system configured to provide power to a load based on a load current includes a first battery cell selectively connected to a first output terminal and a second output terminal and having a first state of charge, a second battery cell selectively connected to the first output terminal and the second output terminal and having a second state of charge indicating a lower charge level than the first state of charge, a direct current (DC)-direct current (DC) converter including an input capacitor connected to the first and second output terminals, and a switching circuit configured to perform a first cell balancing operation or a second cell balancing operation based on a magnitude of the load current, the first cell balancing operation including alternately connecting the input capacitor to the first battery cell or the second battery cell, and the second cell balancing operation including connecting the input capacitor to the first battery cell, based on a magnitude of the load current.

公开(公告)号：US20230420993A1

公开(公告)日：2023-12-28

申请号：US18343511

申请日：2023-06-28

Applicant: Samsung Electronics Co., Ltd. ,  Seoul National University R&DB Foundation

Inventor： Kyunghwan LEE ,  Jungik HA ,  Geonhong MIN ,  Junhyeong LEE

IPC: H02J50/12 ,  H02J7/00

CPC classification number: H02J50/12 ,  H02J2207/20 ,  H02J7/0047 ,  H02J7/00712

Abstract: According to an embodiment, an electronic device for wirelessly receiving power may include: a power reception circuit including a coil, an impedance compensation circuit electrically connected to the power reception circuit, a rectifier circuit electrically connected to the impedance compensation circuit, a battery electrically connected to the rectifier circuit, and a control circuit electrically and/or operatively connected to the impedance compensation circuit, the rectifier circuit, and the battery. According to an embodiment, the control circuit may be configured to: rectify, by controlling the rectifier circuit, power received wirelessly from an external electronic device through the power reception circuit and the impedance compensation circuit into direct current (DC) power. According to an embodiment, the control circuit may be configured to identify at least one of a voltage or a current of the rectified DC power. According to an embodiment, the control circuit may be configured to determine a duty cycle of a control signal to control the impedance compensation circuit, based on the at least one of the voltage or the current. According to an embodiment, the control circuit may be configured to adjust a first voltage output by the impedance compensation circuit by controlling the impedance compensation circuit based on the duty cycle. According to an embodiment, impedance of the power reception circuit may be compensated based on the adjusted first voltage of the impedance compensation circuit.