公开(公告)号：US20200049774A1

公开(公告)日：2020-02-13

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: G01R31/392 ,  H01M10/48 ,  G01R31/388 ,  G01R31/36

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.

公开(公告)号：US20180226809A1

公开(公告)日：2018-08-09

申请号：US15948833

申请日：2018-04-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Rui YANG ,  Xiaokang LIU ,  Zhiwei WU

IPC: H02J7/00 ,  H01M2/10

CPC classification number: H02J7/0014 ,  H01M2/1016 ,  H02J7/0018 ,  H02J7/007 ,  H02M3/33507

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.

公开(公告)号：US20210148988A1

公开(公告)日：2021-05-20

申请号：US17160003

申请日：2021-01-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kejie GAO ,  Zhongxiao LIU ,  Jianbo ZHANG ,  Zhe LI ,  Zhiwei WU ,  Zuqi LIU

IPC: G01R31/392 ,  G01R31/388 ,  G01R31/36 ,  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.

公开(公告)号：US20230052544A1

公开(公告)日：2023-02-16

申请号：US17976402

申请日：2022-10-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shifei YUAN ,  Bingxiao LIU ,  Zhiwei WU

IPC: G01R31/396 ,  G01R31/364 ,  G01R31/388 ,  H01M10/42 ,  H01M10/44

Abstract: Example methods and apparatuses for detecting lithium plating and obtaining a polarization proportion are provided. One example method includes obtaining an open-circuit voltage of a rechargeable battery and a negative electrode open-circuit voltage of the rechargeable battery based on a state of charge of the rechargeable battery. A negative electrode polarization voltage of the rechargeable battery is obtained based on the open-circuit voltage, a terminal voltage of the rechargeable battery, and a polarization proportion of the rechargeable battery. A negative electrode voltage of the rechargeable battery is obtained based on the negative electrode open-circuit voltage and the negative electrode polarization voltage. It is determined, based on the negative electrode voltage, whether lithium plating occurs in the rechargeable battery.

公开(公告)号：US20230030614A1

公开(公告)日：2023-02-02

申请号：US17966114

申请日：2022-10-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hongmin CHEN ,  Xiuwen MA ,  Chong ZHAO ,  Kaisheng CHEN ,  Zhiwei WU

IPC: G01S7/481 ,  G02B3/00 ,  G01S17/894

Abstract: The light emitting assembly includes a substrate (1), a laser light source array, and a lens array. The laser light source array is disposed on the substrate (1), the lens array is disposed on a light emitting side of the laser light source array, one lens (3) in the lens array is disposed opposite to at least one laser light source (2) in the laser light source array, a light emitting surface of the lens (3) is a spherical surface, and at least some laser light sources (2) are eccentrically arranged with corresponding lenses (3). In a manufacturing process, lenses (3) of a same structure and laser light sources (2) of a same structure are used, and eccentric distances between the laser light sources (2) and the lenses (3) are changed, so that light emitting assemblies with different divergence angles can be prepared.

公开(公告)号：US20180123356A1

公开(公告)日：2018-05-03

申请号：US15858210

申请日：2017-12-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Rui YANG ,  Xiaokang LIU ,  Zhiwei WU

IPC: H02J7/00 ,  H02J7/02 ,  H01M10/44

CPC classification number: H02J7/0014 ,  B60L58/22 ,  H01M2/1016 ,  H01M10/4207 ,  H01M10/441 ,  H01M2010/4271 ,  H02J7/0019 ,  H02J7/022 ,  H02J2007/005 ,  H02J2007/0095 ,  Y02T10/7055

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.