公开(公告)号：US20240039063A1

公开(公告)日：2024-02-01

申请号：US18379222

申请日：2023-10-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lan XIE ,  Zhen LIN ,  Guangyu XU ,  Shuai SONG

IPC: H01M10/42 ,  G01R31/3835 ,  H02J7/00 ,  H01M10/48 ,  H01M10/44

CPC classification number: H01M10/4285 ,  G01R31/3835 ,  H02J7/0068 ,  H01M10/425 ,  H01M10/482 ,  H01M10/441 ,  H01M2010/4271

Abstract: A lithium precipitation detection method may include: sending, when a battery management module in the battery pack determines that a change in a charging voltage of the battery pack meets a predetermined condition, a charging request containing a first current to a charging pile for charging, and controlling the battery pack to be charged with the first current for a first predetermined duration and a second predetermined duration, where the first predetermined duration is equal to the second predetermined duration; obtaining, by the battery management module, a first voltage change amount within the first predetermined duration and a second voltage change amount within the second predetermined duration; and determining, when the battery management module determines that a difference between the second voltage change amount and the first voltage change amount is greater than a predetermined voltage threshold, that lithium precipitation occurs in the battery pack.

公开(公告)号：US20240291056A1

公开(公告)日：2024-08-29

申请号：US18655440

申请日：2024-05-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lan XIE ,  Shiliang LIN ,  Zhen LIN ,  Shuai SONG ,  Wei LI ,  Zhonghong LI ,  Kai WU

IPC: H01M10/48 ,  H01M10/42 ,  H01M10/44

CPC classification number: H01M10/482 ,  H01M10/441 ,  H01M10/488 ,  H01M2010/4271

Abstract: An electrode assembly short circuit identification method includes: during charging, according to preset sampling time points, sequentially acquiring a voltage of an electrode assembly at each of the sampling time points; judging whether the electrode assembly has a continuous voltage drop according to the voltage acquired at each of the sampling time points; and determining whether the electrode assembly has a short circuit according to a judgment result.