公开(公告)号：US20240356349A1

公开(公告)日：2024-10-24

申请号：US18760694

申请日：2024-07-01

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhipeng Wu ,  Zimin Chen ,  Zhigang Wang

IPC: H02J7/00 ,  H01M10/42 ,  H02J7/35

CPC classification number: H02J7/0031 ,  H01M10/425 ,  H01M10/4285 ,  H02J7/0013 ,  H02J7/00302 ,  H02J7/00306 ,  H02J7/35 ,  H02J2207/20

Abstract: An energy storage system includes at least one battery rack and a controller. Each battery rack includes a direct current/direct current (DC/DC) converter and a plurality of battery units. The plurality of battery units is connected in series to the DC/DC converter, so that the battery rack can obtain charging power or output discharging power by using the DC/DC converter. Each battery unit includes a cell and an optimizer, and the optimizer of each battery unit is configured to perform bypass or series connection control on the cell in the same battery unit. The controller is connected to each battery unit, and the controller is configured to, when detecting that a fault occurs in a battery unit, control an optimizer of the faulty battery unit to bypass a cell in the faulty battery unit.