公开(公告)号：US20220320873A1

公开(公告)日：2022-10-06

申请号：US17708506

申请日：2022-03-30

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jianshan LI ,  Yanzhong ZHANG ,  He ZHOU ,  Zhipeng WU

IPC: H02J7/00

Abstract: An energy storage system, to improve operating efficiency and system reliability that exist when a component in the energy storage system is faulty, and avoid a waste of resources. The energy storage system includes a plurality of energy storage branches, at least one switch unit, and a control circuit. Each of the energy storage branches includes a first bus, a string-level converter, and a battery string that are sequentially connected in series, a plurality of balancing converters, and a shared bus. The battery string includes a plurality of battery units connected in series, and each of the battery units includes one battery pack. The battery pack is connected to an input side of one corresponding balancing converter, and output sides of the plurality of balancing converters are separately connected to the shared bus.

公开(公告)号：US20240014459A1

公开(公告)日：2024-01-11

申请号：US18469802

申请日：2023-09-19

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhipeng WU ,  Hui MA

IPC: H01M10/617 ,  H01M10/48 ,  H01M10/652

CPC classification number: H01M10/617 ,  H01M10/486 ,  H01M10/482 ,  H01M10/652 ,  H01M2200/105 ,  H01M2010/4271

Abstract: An energy storage system, a battery monitoring method, and an energy storage device, to improve precision and stability of the energy storage system. The system includes: a battery module, a temperature sensor, and a battery monitoring unit. The battery module includes at least two battery areas. The temperature sensor is disposed in each battery area. The battery monitoring unit determines, based on a plurality of temperature signals sent by temperature sensors, a first battery area corresponding to an abnormal temperature signal that reaches a first preset temperature threshold. When an adjacent temperature signal of a second battery area that is connected to the first battery area is greater than a second preset temperature threshold, rated power of the battery module is reduced.

公开(公告)号：US20230033839A1

公开(公告)日：2023-02-02

申请号：US17875916

申请日：2022-07-28

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Hao MENG ,  Zhipeng WU ,  Hui MA

IPC: H01M10/613 ,  H01M10/6565 ,  H01M10/6556 ,  H01M10/6566

Abstract: An energy storage apparatus includes a cabinet, cyclic cooling units, a support, battery modules, and an air supply duct. The support is fastened in an inner cavity of the cabinet, the battery modules are fastened on the support, and the support and the battery modules jointly separate the inner cavity into an air intake region and an air return region. A heat dissipation duct communicating with the air intake region and the air return region is disposed in the battery module. The cyclic cooling unit is located outside the cabinet and includes an air inlet vent and an air return vent. One end of the air supply duct communicates with the air inlet vent, and the other end of the air supply duct communicates with the air intake region. The air return vent communicates with the air return region.

公开(公告)号：US20220368134A1

公开(公告)日：2022-11-17

申请号：US17743593

申请日：2022-05-13

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Chang HEI ,  Zhipeng WU ,  Shuchao WANG

IPC: H02J3/32 ,  H02J3/38 ,  G06Q10/06 ,  G05B19/042

Abstract: An example energy storage system and a related method are disclosed. In the energy storage system, a controller obtains information about user equipment, and then controls a converter and a battery group based on the information about the user equipment, to supply electric energy to an electric device or receive electric energy from a power sourcing device. In this way, the energy storage system can provide reasonable power scheduling, thereby improving utilization of the energy storage system.

公开(公告)号：US20220311252A1

公开(公告)日：2022-09-29

申请号：US17704893

申请日：2022-03-25

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhenghua ZOU ,  Yuxiang LI ,  Zhipeng WU ,  Shijiang YU

IPC: H02J7/00

Abstract: A battery management system is provided in this application, which includes a monitoring module and a sampling module. The sampling module performs sampling on an operating parameter of a direct current converter to obtain target sampling information, and sends the target sampling information to the monitoring module. The monitoring module receives the target sampling information sent by the sampling module, and sends the target sampling information to a central monitoring unit, so that the central monitoring unit determines target charge power for charging an energy storage battery by a power conversion system PCS; and receives a first control instruction sent by the central monitoring unit, and controls the direct current converter to adjust charge power for charging the energy storage battery by the power conversion system PCS to the target charge power.

公开(公告)号：US20240030731A1

公开(公告)日：2024-01-25

申请号：US18474472

申请日：2023-09-26

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhipeng WU ,  Lin LI ,  Wenbin LI

IPC: H02J7/00

CPC classification number: H02J7/0048 ,  H02J7/007182 ,  H02J3/32

Abstract: An energy storage system and a method for correcting a state of charge value thereof. The correction method includes: a battery management unit sends parameter information of each of energy storage units to a power scheduling unit; the power scheduling unit determines, based on accumulated running durations and accumulated power-off durations of the energy storage units, a target energy storage unit requiring correction; the power scheduling unit delivers a power scheduling instruction to the target energy storage unit, to control the target energy storage unit to receive charging power or output discharging power; and the battery management unit monitors a voltage and a state of charge value of target energy storage units; and corrects the state of charge value of the target energy storage unit when the voltage or the state of charge value of the target energy storage unit meets a specified condition.

公开(公告)号：US20230420948A1

公开(公告)日：2023-12-28

申请号：US18465716

申请日：2023-09-12

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Chunlei ZHANG ,  Shijiang YU ,  Zhipeng WU

IPC: H02J3/32 ,  H02J3/00 ,  H02J7/00

CPC classification number: H02J3/32 ,  H02J3/001 ,  H02J7/0014 ,  H02J7/007182 ,  H02J2207/20

Abstract: This application describes an energy storage system including an energy storage module, a direct current bus, a power conversion module, a first power supply module, a second power supply module, and a battery management system. In some implementations, the first power supply module is configured to: select a larger voltage between an output direct current voltage of the energy storage module and a bus voltage of the direct current bus as an input voltage, and output a first direct current voltage. The first power conversion module is configured to: convert the alternating current mains or an output alternating current voltage of the power conversion module into a second direct current voltage. The second power supply module is configured to: select a larger voltage between the first direct current voltage and the second direct current voltage as a target voltage, and supply power to the battery management system based on the target voltage.

公开(公告)号：US20230344235A1

公开(公告)日：2023-10-26

申请号：US18343962

申请日：2023-06-29

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Zhipeng WU ,  Lin LI

IPC: H02J3/32 ,  H02J7/00

CPC classification number: H02J3/32 ,  H02J7/007182 ,  H02J7/00711 ,  H02J2203/10 ,  H02J2207/20

Abstract: An energy storage system is provided, where the energy storage system may include an energy storage module and a power conversion module. The energy storage module may be configured to generate a target waveform signal on the direct current bus when receiving a black start signal. In this case, the power conversion module may be configured to: detect the target waveform signal on the direct current bus, and turn on based on the target waveform signal. When the power conversion module cannot receive a power-on instruction of an energy management system, the power conversion module may also actively turn on when detecting the target waveform signal on the direct current bus, to implement a black startup. This features low costs and higher applicability.

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：US20220329082A1

公开(公告)日：2022-10-13

申请号：US17719130

申请日：2022-04-12

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Jianshan LI ,  He ZHOU ,  Shijiang YU ,  Zhipeng WU

IPC: H02J7/00

Abstract: An energy storage system and a method for controlling an the energy storage system, includes a plurality of energy storage units. The energy storage unit includes a plurality of battery cells, a plurality of balancing units, a voltage conversion unit, a first switch, a second switch, and a control unit. The control unit is configured to detect fault cases of the plurality of battery cells, and control open and closed states of the first switch and the second switch. According to the application, it can be ensured that each energy storage unit in the energy storage system can continuously work when a battery cell is faulty and when state of charge balance between battery cells is implemented, thereby greatly improving reliability of the energy storage system with low costs.