公开(公告)号：US20230076274A1

公开(公告)日：2023-03-09

申请号：US17939260

申请日：2022-09-07

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhen Cao ,  Jie Kong ,  Zhong Wang ,  Tao Zhang ,  Tao Shi

IPC: H02M1/32 ,  H02H1/00 ,  H02H7/122 ,  H02H7/12

Abstract: A short-circuit protection apparatus includes a first detection branch, a second detection branch, and a controller. The first detection branch includes a first sampling resistor and a first sampling capacitor that is connected in parallel to the first sampling resistor. A difference between an absolute value of a second sampling voltage and an absolute value of a first sampling voltage is a first difference. The controller obtains a comparison result between an absolute value of a first sampling voltage at two terminals of the first sampling resistor and an absolute value of a second sampling voltage at two terminals of the second sampling resistor, and if a difference between the absolute value of the second sampling voltage and the absolute value of the first sampling voltage is a second difference and the second difference is less than the first difference, controls the target circuit to stop working.

公开(公告)号：US20230420956A1

公开(公告)日：2023-12-28

申请号：US18464909

申请日：2023-09-11

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhipeng Wu ,  Lin Li ,  He Zhou ,  Yanzhong Zhang ,  Jie Kong

IPC: H02J7/00 ,  H02J3/32 ,  H02J3/38

CPC classification number: H02J7/0016 ,  H02J7/0019 ,  H02J3/32 ,  H02J3/38 ,  H02J7/00712 ,  H02J2207/20 ,  H02J2300/24

Abstract: An energy storage system includes a battery cluster, a direct current converter, a controller, and at least one power conversion system. The energy storage system includes at least one direct current branch. The direct current branch includes a battery cluster and a direct current converter that are connected to each other. The direct current converter performs direct current conversion on a direct current provided by the battery cluster. Each battery cluster includes at least two energy storage modules that are connected in series. The controller controls the first equalization circuit, to balance electricity quantities of battery modules in the battery cluster, and allocates operating power to the power conversion system and the direct current converter. In this solution, impact of bucket effect on the energy storage system is reduced, so that a battery capacity can be more fully utilized.

公开(公告)号：US12160167B2

公开(公告)日：2024-12-03

申请号：US17939260

申请日：2022-09-07

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhen Cao ,  Jie Kong ,  Zhong Wang ,  Tao Zhang ,  Tao Shi

IPC: H02M1/32 ,  H02H1/00 ,  H02H7/12 ,  H02H7/122

Abstract: A short-circuit protection apparatus includes a first detection branch, a second detection branch, and a controller. The first detection branch includes a first sampling resistor and a first sampling capacitor that is connected in parallel to the first sampling resistor. A difference between an absolute value of a second sampling voltage and an absolute value of a first sampling voltage is a first difference. The controller obtains a comparison result between an absolute value of a first sampling voltage at two terminals of the first sampling resistor and an absolute value of a second sampling voltage at two terminals of the second sampling resistor, and if a difference between the absolute value of the second sampling voltage and the absolute value of the first sampling voltage is a second difference and the second difference is less than the first difference, controls the target circuit to stop working.