公开(公告)号：US20230048191A1

公开(公告)日：2023-02-16

申请号：US17751414

申请日：2022-05-23

Applicant: DELTA ELECTRONICS, INC.

Inventor： Sheng-Hua LI ,  Hung-Chang WANG ,  Tsu-Hua AI

IPC: H02J7/00 ,  H02M3/158

Abstract: A battery cell balance circuit includes an AC/DC converter, a plurality of battery cells, a plurality of switches, an isolated DC/DC converter, a circuit switch, and a control unit. The AC/DC converter receives an AC power. The battery cells are connected in series to form a battery link. Each switch is correspondingly connected to one battery cell. The isolated DC/DC converter is coupled to the switches and coupled to the battery link in series. The circuit switch is coupled between the AC/DC converter, the isolated DC/DC converter, and the plurality of switches. The control unit provides a plurality of control signals to correspondingly control the plurality of switches and the circuit switch.