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公开(公告)号：US20220294340A1
公开(公告)日：2022-09-15
申请号：US17827454
申请日：2022-05-27
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yang LIU
Abstract: This application discloses a voltage regulation module, a charging module, and a charging pile that may be used to charge an electric vehicle, to regulate an output voltage in a wide range, and implement seamless switching without power-off in a process of switching from a low-voltage output state to a high-voltage output state. The voltage regulation module includes a first DC/DC converter group and a second DC/DC converter group. Both a parallel circuit and a series circuit exist between the first DC/DC converter group and the second DC/DC converter group. In addition, a controllable switch group is disposed in each of the series circuit and the parallel circuit, and a semiconductor power transistor group is connected in parallel with two terminals of each controllable switch group.
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2.发明公开公开(公告)号：US20240291389A1
公开(公告)日：2024-08-29
申请号：US18654559
申请日：2024-05-03
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jiansheng CHEN , Yang LIU , Yongfa LI
CPC classification number: H02M3/33573 , H02M3/01 , H02J7/00 , H02J2207/20
Abstract: An LLC resonant conversion circuit includes a plurality of harmonic circuits. In each harmonic circuit, a plurality of transformers are electrically connected to each other and are electrically connected to one transformer in another harmonic circuit, so that the harmonic circuits are connected in a crossed manner. In this way, current or voltage of an electrical signal in one harmonic circuit can be distributed to another harmonic circuit. Without adding any component, this achieves the same current value for electrical signals in the harmonic circuits when the harmonic circuits are connected in parallel, and achieves the same voltage value for electrical signals in the harmonic circuits when the harmonic circuits are connected in series. This effectively reduces complexity of a control policy for the entire LLC resonant conversion circuit and also reduces costs of the LLC resonant conversion circuit.
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公开(公告)号：US20240204556A1
公开(公告)日：2024-06-20
申请号：US18594522
申请日：2024-03-04
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yaping LIU , Jiansheng CHEN , Yang LIU , Zhenting JIANG
CPC classification number: H02J7/06 , H02J7/0047 , H02M1/0067 , H02M3/158 , H02M7/23 , H02J2207/20
Abstract: An AC/DC converter and a charging apparatus. The AC/DC converter includes a circuit of at least one phase. In a circuit of each phase, a first end of an inductor is coupled to an alternating current power supply, and the second end of the inductor is coupled to a first end of a first winding and a first end of a second winding; the second end of the first winding is coupled to a winding connection end of a first switching unit, and the second end of the second winding is coupled to a winding connection end of a second switching unit; a bus connection end of the first switching unit is coupled to a bus of the AC/DC converter through at least two first rectifier units.
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Patent Agency Ranking
公开(公告)号：US20240146096A1
公开(公告)日：2024-05-02
申请号：US18492022
申请日：2023-10-23
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Jin YANG , Zejie LV , Yang LIU , Yaping LIU , Jiansheng CHEN
CPC classification number: H02J7/35 , B60L53/51 , H02J7/0029 , B60L2210/10 , H02J2207/20
Abstract: A charging apparatus, a charging pile, and a charging system. The charging apparatus includes a positive bus, a negative bus, a DC/DC conversion circuit, and a soft-start circuit. The soft-start circuit is connected to an input end of the DC/DC conversion circuit through the positive bus and the negative bus, and the input end of the DC/DC conversion circuit is connected to a photovoltaic apparatus or an energy storage apparatus through the positive bus and the negative bus. Therefore, when a first voltage between the positive bus and the negative bus is greater than or equal to a first threshold, the DC/DC conversion circuit may perform power conversion on a second voltage received from the photovoltaic apparatus or the energy storage apparatus, and output the second voltage obtained after power conversion.
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公开(公告)号：US20220279643A1
公开(公告)日：2022-09-01
申请号：US17747810
申请日：2022-05-18
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: This application relates to the field of electronic device technologies, and provides an electronic component with an enclosure frame, a circuit board with an electronic component, and an electronic device, to effectively protect the circuit board from being corroded, thereby prolonging a service life of the electronic device. This application is applied to a charging pile for charging a new energy electric vehicle. An electronic component with an enclosure frame includes an enclosure frame and an electronic component. The enclosure frame defines a cavity that is closed or that has one open end; when the electronic component with an enclosure frame is connected to a circuit board, the enclosure frame and the circuit board can define a cavity that is closed or that has one open end.
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公开(公告)号：US20220216893A1
公开(公告)日：2022-07-07
申请号：US17704112
申请日：2022-03-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: An interface circuit, a string, and a system that are applied to power line communication, to lower device specifications, includes: an inverter, an optimizer group, a capacitor, a magnetic ring, power lines, and a signal line. An optimizer in the optimizer group is configured to adjust a size of a direct current output by a photovoltaic module connected to the optimizer. Two ends of the signal line passing through the magnetic ring are connected to the inverter. Two ends of a power line passing through the magnetic ring are respectively connected to the capacitor and the optimizer group. By using the foregoing interface circuit, a high voltage of a direct current output by the optimizer group is prevented from being introduced into the inverter, thereby reducing a specification requirement of a device such as a capacitor.
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公开(公告)号：US20250088023A1
公开(公告)日：2025-03-13
申请号：US18956324
申请日：2024-11-22
Applicant: Huawei Digital Power Technologies Co., Ltd.
Abstract: A charging apparatus and a charging control method, so that only a small quantity of relays are required when an output voltage range and an output power of a power converter are increased. This effectively reduces circuit costs of the charging apparatus, and effectively simplifies a control procedure for serial connection or parallel connection between a plurality of outputs of the power converter. The apparatus includes a first power converter, a first relay, and a second relay. The first power converter includes a first output end and a second output end. Conduction states of the first relay and the second relay are controlled, to control serial connection or parallel connection between the plurality of output ends of the first power converter.
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公开(公告)号：US20230387807A1
公开(公告)日：2023-11-30
申请号：US18229960
申请日：2023-08-03
Applicant: Huawei Digital Power Technologies Co., Ltd.
CPC classification number: H02M3/335 , B60L53/22 , B60L2210/10
Abstract: A charging circuit includes at least two groups of DC/DC converters, at least one group of relay switches, and at least one diode that are mutually coupled. The relay switch is configured to connect the at least two groups of DC/DC converters in series when a first voltage is in a first threshold range. The first voltage is a charging voltage of an electric vehicle. The relay switch is further configured to connect the at least two groups of DC/DC converters in parallel when the first voltage is in a second threshold range. The diode is configured to prevent a current of a storage battery in the electric vehicle from flowing back. In embodiments of this application, a volume of a charging apparatus can be reduced.
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