公开(公告)号：US20180149701A1

公开(公告)日：2018-05-31

申请号：US15578178

申请日：2016-11-23

Applicant: LG CHEM, LTD.

Inventor： Jin Sam KOO ,  Kwang Soo JEON ,  Jun Hyuk PACK ,  Dong Hyun LEE ,  Kyoung Min KWON ,  Jong Hwa LEE

IPC: G01R31/36 ,  G01R19/165

CPC classification number: G01R31/36 ,  G01R19/16542 ,  G01R31/025 ,  G01R31/3646 ,  G01R31/3648 ,  G01R31/385 ,  G01R31/3865 ,  H02J7/0029

Abstract: Provided is a method for detecting failure of a battery cell due to an unknown discharge current, and the method includes connecting a detector in series between the battery cell and a power supply for supplying a charging power, determining whether the charging of the battery cell progresses by the charging power in excess of a predetermined battery cell specific charging reference time, measuring a current value of the battery cell in real time if the charging of the battery cell progresses in excess of the battery cell specific charging reference time, determining whether the current value of the battery cell measured in real time exceeds a predetermined battery cell specific failure determination reference current range value, and determining a state of the battery cell as a failure state in which an unknown discharge occurs if the current value of the battery cell exceeds the predetermined battery cell specific failure determination reference current range value.

公开(公告)号：US20200209313A1

公开(公告)日：2020-07-02

申请号：US16816710

申请日：2020-03-12

Applicant: LG CHEM, LTD.

Inventor： Jin Sam KOO ,  Kwang Soo JEON ,  Jun Hyuk PACK ,  Dong Hyun LEE ,  Kyoung Min KWON ,  Jong Hwa LEE

IPC: G01R31/36 ,  G01R31/385 ,  G01R19/165

Abstract: A method for detecting failure of a battery cell due to an unknown discharge current, including connecting a detector in series between the battery cell and a power supply for supplying a charging power, determining whether the charging of the battery cell progresses by the charging power in excess of a predetermined battery cell specific charging reference time, measuring a current value of the battery cell in real time if the charging of the battery cell progresses in excess of the battery cell specific charging reference time, determining whether the current value of the battery cell measured in real time exceeds a predetermined battery cell specific failure determination reference current range value, and determining a state of the battery cell as a failure state if the current value of the battery cell exceeds the predetermined battery cell specific failure determination reference current range value.