公开(公告)号：US20230275440A1

公开(公告)日：2023-08-31

申请号：US18172548

申请日：2023-02-22

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Shuang ZHANG ,  Hongxu JIANG ,  Xianyan FAN

IPC: H02J7/00

CPC classification number: H02J7/0019 ,  H02J7/007182 ,  H02J2207/20 ,  H02J3/32

Abstract: A battery electrical energy balancing circuit and method and an energy storage system include a controller, N battery control switches, a filter capacitor control unit, a balancing unit, and a sampling circuit. The balancing unit charges/discharges a target battery, and the sampling unit detects a voltage of the target battery. The filter capacitor control unit performs filtering. The controller controls a battery control switch connected to the target battery to be closed, to obtain the voltage value of the target battery detected by the sampling unit; or controls the balancing unit to charge/discharge the target battery.