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.

公开(公告)号：US10989762B2

公开(公告)日：2021-04-27

申请号：US16121767

申请日：2018-09-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianping Jiang ,  Laisuo Su ,  Jianbo Zhang

IPC: G01R31/392 ,  G01R31/374 ,  G01R31/36 ,  G01R31/3835

Abstract: This application provides a method for detecting a battery state of health. In the method, for a battery that does not supply power to a load within a time period, a detected unit is determined; an open-circuit voltage and a temperature of the detected unit are collected; a battery state of charge value and a loss capacity of the detected unit are obtained by means of calculation; and a battery state of health value of the detected unit is obtained by means of calculation according to a ratio of the loss capacity of the detected unit to an original capacity. This application further provides an apparatus for detecting a battery state of health. By means of technical solutions provided in this application, a deterioration degree of battery performance can be accurately monitored, and impact on a service is avoided.

公开(公告)号：US20180088181A1

公开(公告)日：2018-03-29

申请号：US15830782

申请日：2017-12-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianping Jiang ,  Guanghui Zhang ,  Xiaosheng Zeng ,  Laisuo Su ,  Jianbo Zhang ,  Zhe Li

IPC: G01R31/36 ,  H01M10/48

Abstract: A method for detecting a battery state of health includes a current and a voltage are measured twice in a period of time; corresponding model algorithms are selected according to the measured current values; corresponding battery open circuit voltage values and battery state of charge values at a start time and an end time of the period are obtained based on the model algorithms; a battery capacity difference that indicates a present battery retention capacity and a battery capacity difference that indicates a future battery retention capacity are calculated; and a battery state of health value is calculated when impact of a measured battery temperature value is considered.

公开(公告)号：US20180364312A1

公开(公告)日：2018-12-20

申请号：US16121767

申请日：2018-09-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianping Jiang ,  Laisuo Su ,  Jianbo Zhang

IPC: G01R31/36

Abstract: This application provides a method for detecting a battery state of health. In the method, for a battery that does not supply power to a load within a time period, a detected unit is determined; an open-circuit voltage and a temperature of the detected unit are collected; a battery state of charge value and a loss capacity of the detected unit are obtained by means of calculation; and a battery state of health value of the detected unit is obtained by means of calculation according to a ratio of the loss capacity of the detected unit to an original capacity. This application further provides an apparatus for detecting a battery state of health. By means of technical solutions provided in this application, a deterioration degree of battery performance can be accurately monitored, and impact on a service is avoided.

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.

公开(公告)号：US10712395B2

公开(公告)日：2020-07-14

申请号：US15830782

申请日：2017-12-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianping Jiang ,  Guanghui Zhang ,  Xiaosheng Zeng ,  Laisuo Su ,  Jianbo Zhang ,  Zhe Li

IPC: G01R31/392 ,  G01R31/3842 ,  H01M10/48 ,  G01R31/36 ,  G01R31/367 ,  G01R31/3828

Abstract: A method for detecting a battery state of health includes a current and a voltage are measured twice in a period of time; corresponding model algorithms are selected according to the measured current values; corresponding battery open circuit voltage values and battery state of charge values at a start time and an end time of the period are obtained based on the model algorithms; a battery capacity difference that indicates a present battery retention capacity and a battery capacity difference that indicates a future battery retention capacity are calculated; and a battery state of health value is calculated when impact of a measured battery temperature value is considered.