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公开(公告)号：US12003130B2
公开(公告)日：2024-06-04
申请号：US17693092
申请日：2022-03-11
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： He Zhou , Zhaohui Wang , Xun Wang , Yanzhong Zhang
CPC classification number: H02J7/00712 , H02J7/0013 , H02J7/0048 , H02J7/005 , H02J7/00714 , H02M3/04 , H02M7/44 , H02S40/38
Abstract: An energy storage system includes one or more energy storage unit clusters, and the energy storage unit cluster includes at least two energy storage modules connected in series. The energy storage system further includes a first bus, a second bus, and a centralized monitoring system of the energy storage unit cluster, where the second bus is a direct current bus. The energy storage unit cluster is coupled to the first bus by using a first converter. One energy storage module includes one energy storage element group and one DC/DC converter, and the energy storage element group is coupled to the second bus by using the DC/DC converter. The centralized monitoring system is connected to the energy storage unit cluster through a control bus, and is configured to control a DC/DC converter in any energy storage module in the energy storage unit cluster.
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2.发明公开公开(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
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.
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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.
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公开(公告)号：US20240014677A1
公开(公告)日：2024-01-11
申请号：US18471789
申请日：2023-09-21
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhipeng Wu , Yang Hu , He Zhou , Shijiang Yu
IPC: H02J7/00
CPC classification number: H02J7/0069 , H02J7/0013 , H02J7/0048 , H02J7/00712 , H02J2207/20
Abstract: A method for controlling an energy storage system includes: determining that a first battery cluster in a plurality of battery clusters needs to be calibrated; and controlling, based on a state of charge SOC of the first battery cluster and a current charging or discharging state of the energy storage system, the first battery cluster to be charged or discharged or to be in a standby state, so that the first battery cluster satisfies a SOC calibration condition. In the method, charging, discharging, or standby-state control needs to be performed on only one battery cluster that needs to be calibrated in the energy storage system, independent decoupling management is implemented on the battery cluster, and normal running of the energy storage system is not affected. This enables the battery cluster to quickly satisfy the SOC calibration condition and can improve SOC accuracy of the energy storage system.
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公开(公告)号：US20230402863A1
公开(公告)日：2023-12-14
申请号：US18455149
申请日：2023-08-24
Applicant: Huawei Digital Power Technologies Co., Ltd.
IPC: H02J7/00
CPC classification number: H02J7/0049 , H02J7/007182 , H02J7/0019 , H02J2300/24
Abstract: An energy system mainly includes a charging and discharging control apparatus and an energy storage battery. When a battery level is not greater than a discharging level threshold and a charging current of the energy storage battery is less than a charging current threshold, the charging and discharging control apparatus may control the energy storage battery to stop charging and discharging. When the battery level is not less than a charging level threshold and a discharging current of the energy storage battery is less than a discharging current threshold, the charging and discharging control apparatus may also control the energy storage battery to stop charging and discharging.
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Patent Agency Ranking
公开(公告)号：US20230076934A1
公开(公告)日：2023-03-09
申请号：US17940402
申请日：2022-09-08
Applicant: Huawei Digital Power Technologies Co, Ltd.
Inventor： Lin Li , He Zhou , Haibin Guo
IPC: G01R31/387 , G01R31/374 , H02J7/00
Abstract: An energy storage system includes a control apparatus and one or more battery sub-arrays. Each battery sub-array includes one or more energy storage racks. Each energy storage rack includes one or more battery packs. The control apparatus is configured to: determine that parameter calibration needs to be performed on a first energy storage rack in a first battery sub-array; when the first energy storage rack meets a preset condition, increase a weight of the first energy storage rack in the first battery sub-array; and after each battery pack in the first energy storage rack is fully charged or remaining power of the battery pack is fully discharged, perform calibration on a parameter of the battery pack.
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7.发明公开公开(公告)号：US20240136850A1
公开(公告)日：2024-04-25
申请号：US18401455
申请日：2023-12-30
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Shijiang Yu , Zhipeng Wu , He Zhou , Lei Shi , Yang Hu
CPC classification number: H02J9/068 , H02J3/0012 , H02J3/32 , H02J7/35 , H02J9/061 , H02J2207/20 , H02J2300/24
Abstract: This disclosure provides an energy storage apparatus, an energy storage apparatus control method, and a photovoltaic system. The energy storage apparatus includes: a plurality of battery clusters, a plurality of conversion units, a start unit, and a controller. The controller includes a plurality of control units. The start unit is configured to: after receiving a start signal, control a control switch in at least one battery cluster to close, to start a control unit corresponding to the battery cluster. The control unit is configured to: determine, based on a state of the control switch in the battery cluster, whether a black start mode is on; and when determining that the black start mode is on, control a DC-DC converter in the corresponding conversion unit to release electric energy stored in a battery pack in the corresponding battery cluster, to energize a direct current bus.
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公开(公告)号：US20230170711A1
公开(公告)日：2023-06-01
申请号：US18154784
申请日：2023-01-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , He Zhou , Lei Shi
IPC: H02J7/00
CPC classification number: H02J7/0016 , H02J7/005 , H02J7/0029 , H02J7/0048 , H02J7/00712 , H02J3/32 , H02J2207/20
Abstract: This application provides an energy storage system including at least one energy storage unit cluster and a centralized monitoring system of the energy storage unit cluster. The energy storage unit cluster including at least two energy storage modules. A first energy storage unit cluster includes an energy storage element group and a switch bridge arm, the switch bridge arm including a master control switch and a bypass switch. The energy storage unit cluster is coupled to a direct current (DC) busbar through a DC/DC converter. The centralized monitoring system is connected to the energy storage unit cluster through a control bus and is configured to control the master control switch and the bypass switch of any energy storage module in the energy storage unit cluster to be on or off.
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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
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.
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10.发明公开公开(公告)号：US20240235252A9
公开(公告)日：2024-07-11
申请号：US18401455
申请日：2023-12-30
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Shijiang Yu , Zhipeng Wu , He Zhou , Lei Shi , Yang Hu
CPC classification number: H02J9/068 , H02J3/0012 , H02J3/32 , H02J7/35 , H02J9/061 , H02J2207/20 , H02J2300/24
Abstract: This disclosure provides an energy storage apparatus, an energy storage apparatus control method, and a photovoltaic system. The energy storage apparatus includes: a plurality of battery clusters, a plurality of conversion units, a start unit, and a controller. The controller includes a plurality of control units. The start unit is configured to: after receiving a start signal, control a control switch in at least one battery cluster to close, to start a control unit corresponding to the battery cluster. The control unit is configured to: determine, based on a state of the control switch in the battery cluster, whether a black start mode is on; and when determining that the black start mode is on, control a DC-DC converter in the corresponding conversion unit to release electric energy stored in a battery pack in the corresponding battery cluster, to energize a direct current bus.
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