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公开(公告)号：US20190025357A1
公开(公告)日：2019-01-24
申请号：US16137126
申请日：2018-09-20
Applicant: Huawei Technologies Co., Ltd.
Abstract: A frequency regulation method and apparatus is applied to an insulation impedance detection apparatus in a direct current power system, and relates to the field of security monitoring technologies of a direct current electrical system. The method includes: collecting sampling voltages at a sampling point for at least three time points; determining a voltage frequency regulation manner based on the sampling voltages, obtained through sampling, at the at least three time points; and then regulating a voltage frequency of a power supply according to the determined voltage frequency regulation manner. The voltage frequency of the power supply can be regulated based on the at least three sampling voltages obtained through sampling. Therefore, the insulation impedance detection apparatus reduces insulation impedance detection duration while ensuring accuracy of measured insulation impedance.
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公开(公告)号：US12155243B2
公开(公告)日：2024-11-26
申请号：US17010067
申请日：2020-09-02
Applicant: Huawei Technologies Co., Ltd.
Inventor： Lulu Zheng , Rui Yang , Shifei Yuan , Zhiwei Wu
Abstract: A battery control method comprising detecting whether a current value of N battery systems is greater than a safe current, where the safe current is a safe current of a target battery system, and the target battery system has a largest resistance difference of parallel branch circuits respectively corresponding to M battery cells in the target battery system, and adjusting the current value of the N battery systems when the current value of the N battery systems is greater than the safe current.
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公开(公告)号：US10581254B2
公开(公告)日：2020-03-03
申请号：US15948833
申请日：2018-04-09
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Rui Yang , Xiaokang Liu , Zhiwei Wu
Abstract: An equalization current adjustment method includes: determining a battery unit to be equalized in a battery pack, and obtaining a current actual equalization current value of the battery unit; and when it is determined that a difference between the current actual equalization current value of the battery unit and a target equalization current value does not fall within a range of a preset threshold, adjusting a fundamental amplitude of an alternating current power supply of a target circuit on which the battery unit is located and/or a voltage gain of the target circuit, so that the difference between the current actual equalization current value of the battery unit and the target equalization current value falls within the range of the preset threshold.
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Patent Agency Ranking
公开(公告)号：US20210215414A1
公开(公告)日：2021-07-15
申请号：US17216196
申请日：2021-03-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Haomang Hu , Zhiwei Wu , Xiaokang Liu , Jing Jiang , Zuqi Liu
Abstract: A vehicle temperature management system includes a refrigerant circulation system including a compressor, a first heat exchanger, a depressurization apparatus, a heat exchange plate, a four-way valve, and a second heat exchanger that is configured to heat a first refrigerant that flows to an input port when a management object needs to be cooled through the heat exchange plate, and cool the first refrigerant that flows to the heat exchange plate when the management object needs to be heated through the heat exchange plate.
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公开(公告)号：US10948548B2
公开(公告)日：2021-03-16
申请号：US16657651
申请日：2019-10-18
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kejie Gao , Zhongxiao Liu , Jianbo Zhang , Zhe Li , Zhiwei Wu , Zuqi Liu
IPC: G01R31/36 , G01R31/392 , G01R31/388 , H01M10/48
Abstract: Estimating a battery state of health (SOH) is described. The state of heath is estimated by obtaining a partial charge or discharge capacity of a target battery in a state of charge (SOC) interval of each of a plurality of SOCs. First dV/dSOC data is separately calculated for each SOC in an mth preset battery capacity based on the mth preset battery capacity and the partial charge or discharge capacity in the SOC interval of each SOC. A smallest overall dV/dSOC data deviation is determined from all overall dV/dSOC data deviations corresponding to M preset battery capacities. A preset battery capacity is determined corresponding to the smallest overall dV/dSOC data deviation as a retention capacity of an aged target battery. The retention capacity of the aged target battery is divided by a retention capacity of the target battery in a new battery state, to obtain the SOH estimate of the target battery.
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公开(公告)号：US10361568B2
公开(公告)日：2019-07-23
申请号：US15858210
申请日：2017-12-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Rui Yang , Xiaokang Liu , Zhiwei Wu
Abstract: An energy balancing apparatus and method, and a terminal are provided in the battery field. The apparatus may include a controlled alternating current energy supply, an alternating current energy distribution circuit, filter circuits, rectifier circuits, and a balance control circuit. The controlled alternating current energy supply and an input port of the alternating current energy distribution circuit are connected in parallel, each output port of the alternating current energy distribution circuit and an input side of a corresponding filter circuit are connected in parallel, an output side of each filter circuit and an alternating current side of a corresponding rectifier circuit are connected in parallel, a direct current side of each rectifier circuit and a corresponding battery cell are connected in parallel, each battery cell is connected to the balance control circuit, and the balance control circuit is connected to the controlled alternating current energy supply.
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公开(公告)号：US11150284B2
公开(公告)日：2021-10-19
申请号：US16137126
申请日：2018-09-20
Applicant: Huawei Technologies Co., Ltd.
Abstract: A frequency regulation method and apparatus is applied to an insulation impedance detection apparatus in a direct current power system, and relates to the field of security monitoring technologies of a direct current electrical system. The method includes: collecting sampling voltages at a sampling point for at least three time points; determining a voltage frequency regulation manner based on the sampling voltages, obtained through sampling, at the at least three time points; and then regulating a voltage frequency of a power supply according to the determined voltage frequency regulation manner. The voltage frequency of the power supply can be regulated based on the at least three sampling voltages obtained through sampling. Therefore, the insulation impedance detection apparatus reduces insulation impedance detection duration while ensuring accuracy of measured insulation impedance.
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公开(公告)号：US10908225B2
公开(公告)日：2021-02-02
申请号：US16657651
申请日：2019-10-18
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kejie Gao , Zhongxiao Liu , Jianbo Zhang , Zhe Li , Zhiwei Wu , Zuqi Liu
IPC: G01R31/36 , G01R31/392 , G01R31/388 , H01M10/48
Abstract: Estimating a battery state of health (SOH) is described. The state of heath is estimated by obtaining a partial charge or discharge capacity of a target battery in a state of charge (SOC) interval of each of a plurality of SOCs. First dV/dSOC data is separately calculated for each SOC in an mth preset battery capacity based on the mth preset battery capacity and the partial charge or discharge capacity in the SOC interval of each SOC. A smallest overall dV/dSOC data deviation is determined from all overall dV/dSOC data deviations corresponding to M preset battery capacities. A preset battery capacity is determined corresponding to the smallest overall dV/dSOC data deviation as a retention capacity of an aged target battery. The retention capacity of the aged target battery is divided by a retention capacity of the target battery in a new battery state, to obtain the SOH estimate of the target battery.
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