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公开(公告)号：US20220326294A1
公开(公告)日：2022-10-13
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
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：US20220200314A1
公开(公告)日：2022-06-23
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
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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Patent Agency Ranking
公开(公告)号：US20230110231A1
公开(公告)日：2023-04-13
申请号：US17959505
申请日：2022-10-04
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin LI , Haibin GUO , He ZHOU
Abstract: An energy storage system and a control method thereof, so that a voltage level of an energy storage module in the energy storage system can be flexibly matched and the energy storage module can be effectively controlled based on a voltage of a direct current bus, to implement a high response speed. The energy storage system includes a plurality of energy storage modules, and each of the plurality of energy storage modules is connected to the direct current bus. The energy storage module includes a plurality of battery clusters and a plurality of first direct current-direct current converters. The battery cluster is configured to provide a direct current to the first direct current-direct current converter, or store a direct current transmitted by the first direct current-direct current converter.
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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.
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公开(公告)号：US20230052129A1
公开(公告)日：2023-02-16
申请号：US17886128
申请日：2022-08-11
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin LI , Haibin GUO , He ZHOU
IPC: H02J7/00
Abstract: An energy storage system includes N switch units and N battery packs connected in series. The N switch units are separately connected to two ends of the N battery packs in a one-to-one correspondence. Each of the N switch units is configured to: when the energy storage system is in a charging state and remaining power of a battery pack correspondingly connected to each switch unit meets a first preset condition, and/or when the energy storage system is in a discharging state and the remaining power of the battery pack correspondingly connected to each switch unit meets a second preset condition, perform disconnection processing on the battery pack correspondingly connected to each switch unit. The first preset condition includes being greater than or equal to a first preset power value. The second preset condition includes being less than or equal to a second preset power value.
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公开(公告)号：US20230014195A1
公开(公告)日：2023-01-19
申请号：US17955031
申请日：2022-09-28
Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Inventor： He ZHOU , Yunyu TANG , Lei SHI
Abstract: An inductor (100) is provided, and includes an inductor winding (10), a housing (20), and a thermally conductive packaging material (30). The inductor winding is disposed in the housing. The thermally conductive packaging material is potted in the housing to fill a gap between the inductor winding and the housing. The thermally conductive packaging material includes a first packaging layer (31) and a second packaging layer (32), and a coefficient of thermal conductivity of the first packaging layer is greater than a coefficient of thermal conductivity of the second packaging layer. The housing includes a heat dissipation wall (21) and a packaging wall (22), and the first packaging layer is closer to the heat dissipation wall than the second packaging layer. Heat generated by the inductor can be dissipated after being transmitted to each surface of the housing through the thermally conductive packaging material.
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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.
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