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公开(公告)号：US20250158386A1
公开(公告)日：2025-05-15
申请号：US18917734
申请日：2024-10-16
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yongbing GAO , Xiaoxiang Zhou , Junsong Tang , Zhuang Sun , Wangjie Xie , Yong Xu , Tao Shi , He Zhou
Abstract: A power supply system includes a power conditioning apparatus, a transformer, and a controller. The power conditioning apparatus includes an inverter circuit, at least one grid-connected switch, a voltage-to-ground detector. The inverter circuit is configured to connect to the inverter circuit is configured to connect to the transformer through the at least one grid-connected switch, and the transformer is configured to connect to a power grid. When one grid-connected switch is turned off and turned on, the voltage-to-ground detector detects voltage to grounds of the power conditioning apparatus to obtain a first voltage value and a second voltage value respectively. The controller outputs alarm information for grounding of a neutral wire of the transformer or controls the power conditioning apparatus to stop working when a difference between the second voltage value and the first voltage value falls within a preset voltage range.
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公开(公告)号：US12272973B2
公开(公告)日：2025-04-08
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 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.
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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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4.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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5.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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Patent Agency Ranking
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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8.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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公开(公告)号：US11852671B2
公开(公告)日：2023-12-26
申请号：US17707436
申请日：2022-03-29
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhong Wang , Shengjie Zhang , Jianshan Li , Yu Peng , Shijiang Yu , He Zhou , Bo Yu
CPC classification number: G01R31/14 , G01R31/52 , H02J3/381 , H02J2300/24
Abstract: A photovoltaic energy system and a method for detecting a ground insulation impedance, improve accuracy of detecting a ground insulation impedance after one or more conversion circuits are connected in parallel. The photovoltaic energy system includes one or more conversion circuits and a detection circuit. The detection circuit includes an alternating current signal source and a sampling resistor that are connected in series, a first sampling circuit, and a control circuit. The control circuit is configured to control the alternating current signal source to output harmonic signals of a first frequency and a second frequency. The first sampling circuit is configured to: when the alternating current signal source outputs the harmonic signal of the first frequency, collect a voltage at both terminals of the sampling resistor to obtain a first voltage.
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公开(公告)号：US12301030B2
公开(公告)日：2025-05-13
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.
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