公开(公告)号：US20240159834A1

公开(公告)日：2024-05-16

申请号：US18384756

申请日：2023-10-27

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Yongchan KIM ,  Jaeyoung LEE ,  Jeongwon OH ,  Hyewon KIM ,  Wonsuk LEE ,  Sebastian SZEVER

IPC: G01R31/3835 ,  G01R31/392 ,  G01R31/396

CPC classification number: G01R31/3835 ,  G01R31/392 ,  G01R31/396

Abstract: A battery diagnosis method, a battery diagnosis device and a battery pack performing the same. The battery diagnosis device may include a detection device that detects a cell voltage of a battery cell and a diagnosis device. The diagnosis device calculates a rate of voltage decrease over time of the cell voltage if a negligence test of the battery cell is initiated, and detects an inflection point at which the rate of voltage decrease changes from a decreasing trend to an increasing trend. The diagnosis device diagnoses the battery cell as an abnormal battery cell if the inflection point is detected.