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公开(公告)号：US20250158397A1
公开(公告)日：2025-05-15
申请号：US19021226
申请日：2025-01-15
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , Lei Shi , Yongbing Gao
Abstract: A system includes a power supply, a collector, and a photovoltaic inverter. The photovoltaic inverter includes a controllable switch on a direct current side, an inverter unit, a controllable switch on an alternating current side, a collector configured to obtain a power supply parameter of the photovoltaic power supply system, a first controller, and a second controller. When the power supply parameter of the photovoltaic power supply system is greater than or equal to a power supply parameter threshold, the first turns off the controllable switch on the direct current side to disconnect an electrical connection between a power supply and the inverter unit. When the power supply parameter of the photovoltaic power supply system is greater than or equal to the power supply parameter threshold, the second controller turns off the controllable switch on the alternating current side to disconnect an electrical connection between the inverter unit and a load.
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公开(公告)号：US11870346B2
公开(公告)日：2024-01-09
申请号：US17548963
申请日：2021-12-13
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Dong Chen , Lei Shi , Zhaohui Wang
Abstract: A DC-DC converter includes: a first capacitor, a second capacitor, a first switch device, a second switch device, a third switch device, a fourth switch device, a flying capacitor, where one end of the flying capacitor is coupled to the first intermediate node, the other end of the flying capacitor is coupled the second intermediate node; and the protective circuit, including a clamping unit and a buffering unit, where when a voltage between the positive end of the bus and the negative end of the bus increases, the clamping unit clamps the first switch device to a voltage of the first capacitor, and clamps the fourth switch device to a voltage of the second capacitor, and the buffering unit reduces a current flowing through the clamping unit and the flying capacitor.
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公开(公告)号：US11757287B2
公开(公告)日：2023-09-12
申请号：US17686163
申请日：2022-03-03
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Wanyuan Qu , Fangcheng Liu , Lei Shi , Wuhua Li
CPC classification number: H02J3/381 , H02M1/0095 , H02M3/156 , H02J2300/26
Abstract: A voltage conversion circuit includes: an inductor, a first switch module, N second switch modules connected in series, N third switch modules connected in series, and N−1 flying capacitors. One terminal of the first switch module is separately connected to one terminal of the N second switch modules connected in series and one terminal of the N third switch modules connected in series. The other terminal of the N third switch modules connected in series is connected to a positive electrode of a high-voltage power supply. The other terminal of the first switch module and the other terminal of the N second switch modules connected in series are connected to a negative electrode of the high-voltage power supply. A low-voltage power supply is connected to the two terminals of the first switch module through the inductor.
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公开(公告)号：US20250167681A1
公开(公告)日：2025-05-22
申请号：US19032051
申请日：2025-01-18
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , Lei Shi , Yongbing Gao
Abstract: A power conversion apparatus, wherein two bus capacitors are connected in series between a direct current bus, and the direct current bus is connected to a first output end and a second output end of the power conversion apparatus. An input end of a first direct current conversion circuit is connected to a first group of first input ends, and an output end of a first direct current conversion circuit is connected to two ends of a first bus capacitor. An input end of a second direct current conversion circuit is connected to a second group of second input ends, and an output end of the second direct current conversion circuit is connected to two ends of a second bus capacitor. A first group of second input ends are connected to the direct current bus, and a second group of first input ends are connected to the direct current bus.
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5.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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Patent Agency Ranking
公开(公告)号：US11984819B2
公开(公告)日：2024-05-14
申请号：US17495117
申请日：2021-10-06
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhaohui Wang , Lei Shi , Dong Chen
IPC: H02J3/38 , H02M1/12 , H02M1/14 , H02M7/5387
CPC classification number: H02M7/53871 , H02J3/381 , H02M1/123 , H02M1/14 , H02J2300/24
Abstract: A power conversion circuit includes a switching network, a control circuit, a filter circuit, and a direct current side circuit; and the filter circuit includes a first power inductor, a common mode choke, a first differential mode filter capacitor, a first common mode filter capacitor, and a second common mode filter capacitor. The first power inductor includes a first winding and a second winding, and the common mode choke includes a third winding and a fourth winding; a first end of the first winding and a first end of the second winding are separately connected to the switching network, a second end of the first winding and a second end of the second winding are respectively connected to a first end of the third winding and a first end of the fourth winding.
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7.发明公开公开(公告)号：US20240022077A1
公开(公告)日：2024-01-18
申请号：US18477563
申请日：2023-09-29
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Shijiang Yu , Jianshan Li , Chunlei Zhang , Zhipeng Wu , Lei Shi
CPC classification number: H02J3/32 , H02J9/06 , H02J3/38 , H02J2300/24
Abstract: An energy storage apparatus, including a plurality of battery modules, a switch unit, a start unit; and an electrical energy output port. The energy storage apparatus is configured for use in a photovoltaic power generation system having a plurality of photovoltaic modules, a direct current-to-direct current (DC/DC) converter, and a direct current-to-alternating current (DC/AC) converter. The plurality of battery modules is separately connected to the start unit and the switch unit, and the plurality of battery modules are configured to, when the start unit receives a start signal, control the switch unit to be turned on. The energy storage apparatus is configured to, in response to the switch unit being turned on, output electrical energy of the plurality of battery modules through the electrical energy output port, and, in response to the switch unit being turned off, disconnect the plurality of battery modules from the electrical energy output port.
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公开(公告)号：US11811315B2
公开(公告)日：2023-11-07
申请号：US17350191
申请日：2021-06-17
Applicant: Huawei Digital Power Technologies, Co., Ltd.
Inventor： Yongbing Gao , Jun Wang , Lei Shi
CPC classification number: H02M3/155 , H02H7/1213 , H02M1/44 , H02M7/537 , H04B1/40
Abstract: A direct current (DC)/DC conversion circuit includes an input end, a power circuit, and an output end, a bypass circuit that is a unidirectional conduction circuit, and a switch disposed between the input end and the power circuit, where the input end is configured to be coupled to an external power supply to receive power to the DC/DC conversion circuit. The bypass circuit is coupled between the input end and the power circuit, the bypass circuit is disposed between the switch and the power circuit, and the bypass circuit is coupled to the power circuit in parallel. The switch is configured to be closed when the input end is reversely coupled to the external power supply to enable a current from a positive electrode of the external power supply to flow back to a negative electrode of the external power supply through the bypass circuit and the switch.
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公开(公告)号：US11811217B2
公开(公告)日：2023-11-07
申请号：US17584102
申请日：2022-01-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: A photovoltaic power generation system includes a capacitor bridge arm, an inverter bridge arm, and the fault protection apparatus. The capacitor bridge arm includes a positive electrode output port, a negative electrode output port, and a reference output port The inverter bridge arm includes a positive electrode input port, a negative electrode input port, and a reference input port. The positive electrode input port is connected to the positive electrode output port. The negative electrode input port is connected to the negative electrode output port. The reference input port is connected to the reference output port by using the fault protection apparatus. The fault protection apparatus is turned off based on a magnitude value or a variation of a voltage, or a magnitude value or a variation of a current between the reference input port and the positive electrode input port or the negative electrode input port.
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公开(公告)号：US20230179106A1
公开(公告)日：2023-06-08
申请号：US18063321
申请日：2022-12-08
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jun Wang , Lei Shi , Yunfeng Liu , Zhaohui Wang
IPC: H02M3/335 , H02M1/08 , H03K17/687
CPC classification number: H02M3/33584 , H02M1/08 , H03K17/687
Abstract: A bidirectional direct current converter includes a controller that controls a switching transistor in the bidirectional direct current converter to reduce an inductance of an inductor, thereby reducing a size and costs of the inductor, and further reducing a size and costs of the entire bidirectional direct current converter. The bidirectional direct current converter further includes a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, and a capacitor. The controller is coupled to the first switching transistor, the second switching transistor, the third switching transistor, and the fourth switching transistor. The controller performs complementary control on the first switching transistor and the third switching transistor, and performs complementary control on the second switching transistor and the fourth switching transistor.
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