公开(公告)号：US20220344947A1

公开(公告)日：2022-10-27

申请号：US17726600

申请日：2022-04-22

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Zhipeng WU ,  He Zhou ,  Zhigang Wang

IPC: H02J7/00 ,  H02J7/02

Abstract: An energy storage system, a balancing control method for an energy storage system, or a photovoltaic power system are disclosed. The energy storage system includes a controller and three power conversion branches. Each power conversion branch includes a power conversion circuit, or each power conversion branch includes at least two power conversion circuits connected in series. A second end of each power conversion circuit is connected to at least one battery cluster, each battery cluster includes at least two energy storage modules connected in series, each energy storage module includes one direct current/direct current conversion circuit and one battery pack, an output end of each battery pack is connected to an input end of a corresponding direct current/direct current conversion circuit, and an output end of each direct current/direct current conversion circuit is connected in parallel to a balancing bus.

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.

公开(公告)号：US20240088697A1

公开(公告)日：2024-03-14

申请号：US18505505

申请日：2023-11-09

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： He Zhou ,  Zhigang Wang ,  Zhipeng Wu

IPC: H02J7/00

CPC classification number: H02J7/00712 ,  H02J7/0014 ,  H02J7/0031 ,  H02J7/005 ,  H02J7/0063 ,  H02J2207/20

Abstract: A battery system comprises a first busbar, at least one battery rack, and a control circuit are included. The battery rack includes a plurality of battery units. Each battery unit includes a battery module, a connection switch K1, and an isolation switch K2. The connection switch K1 is connected in series to the battery module to form a first branch, and the isolation switch K2 is connected in parallel to the first branch. The control circuit is connected to control ends of the connection switch K1 and the isolation switch K2, and is configured to: control, based on a first voltage required by the load, connection switches K1 and isolation switches K2 of N battery units in the battery rack, to make an output voltage of the first busbar meet the first voltage required by the load.