公开(公告)号：US20190305384A1

公开(公告)日：2019-10-03

申请号：US16447600

申请日：2019-06-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bingxiao LIU ,  Rui YANG ,  Xiaokang LIU

IPC: H01M10/48 ,  G01R31/3842 ,  G01R31/396 ,  G01R31/36

Abstract: A battery micro-short circuit detection method and apparatus are disclosed. The method includes: obtaining a target initial battery parameter value of a target battery at an initial moment, and determining a reference initial battery parameter value of a virtual reference battery at the initial moment, where a response of the virtual reference battery is the same as a response of the target battery when a same excitation condition is given; obtaining a target battery parameter value of the target battery at a specified moment; determining a reference battery parameter value of the virtual reference battery at the specified moment based on the target battery parameter value and the reference initial battery parameter; and calculating a difference between the target battery parameter value and the reference battery parameter value, and determining, based on the difference, that the target battery is micro-short-circuited.

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：US20190219640A1

公开(公告)日：2019-07-18

申请号：US16365352

申请日：2019-03-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bingxiao LIU ,  Guanghui ZHANG ,  Yuejiu ZHENG

IPC: G01R31/387 ,  G01R31/3842 ,  G01R31/02 ,  G01R19/165 ,  H01M10/42 ,  B60L3/00

CPC classification number: G01R31/387 ,  B60L3/0046 ,  G01R19/16542 ,  G01R31/025 ,  G01R31/36 ,  G01R31/3842 ,  H01M10/425 ,  H01M2010/4271

Abstract: A method and an apparatus for detecting a micro short circuit of a battery are provided. The detection method includes: obtaining a first reference charge capacity at a first charging end moment and a second reference charge capacity at a second charging end moment of a to-be-detected single battery included in a to-be-detected battery pack (S201), where the reference charge capacity is a difference between an electric quantity of the to-be-detected single battery and an electric quantity of a reference single battery, and the reference single battery is a single battery, which has a largest voltage value at a charging end moment, in all single batteries included in the to-be-detected battery pack; and determining, based on a difference between the first reference charge capacity and the second reference charge capacity, that a micro short circuit occurs in the to-be-detected single battery.