公开(公告)号：US11573273B2

公开(公告)日：2023-02-07

申请号：US17561750

申请日：2021-12-24

申请人： Contemporary Amperex Technology Co., Limited

发明人： Yimin Wei ,  Zhen Lin ,  Xingsheng Wei

IPC分类号： G01R31/388 ,  G01R31/367 ,  G01R31/36

摘要： The present application discloses a method, apparatus, device and medium for estimating performance parameters of a battery. The method for estimating performance parameters of a battery includes: generating a first curve segment to be calibrated during a process of adjusting a battery capacity in a first capacity interval with a first capacity value as an endpoint value; determining, in a preset reference curve, a first target curve segment that matches the first curve segment to be calibrated; determining a SOC interval corresponding to the first target curve segment as a SOC interval of the first curve segment to be calibrated; and estimating the performance parameters of the battery based on the SOC interval of the first curve segment to be calibrated, the performance parameters include a current SOC and/or a current battery capacity.

公开(公告)号：US11955608B2

公开(公告)日：2024-04-09

申请号：US18379222

申请日：2023-10-12

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Lan Xie ,  Zhen Lin ,  Guangyu Xu ,  Shuai Song

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

CPC分类号： H01M10/4285 ,  G01R31/3835 ,  H01M10/425 ,  H01M10/441 ,  H01M10/482 ,  H02J7/0068 ,  H01M2010/4271

摘要： 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：US11870289B2

公开(公告)日：2024-01-09

申请号：US18327702

申请日：2023-06-01

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Shan Huang ,  Shichao Li ,  Haili Li ,  Wei Zhao ,  Zhen Lin

IPC分类号： H02J7/00 ,  H01M10/44 ,  B60L58/13 ,  H01M10/42

CPC分类号： H02J7/0048 ,  B60L58/13 ,  H01M10/425 ,  H01M10/44 ,  H01M2010/4271 ,  H01M2220/20

摘要： A method for charging a traction battery includes obtaining a battery parameter of the traction battery that includes a state of charge and/or an open-circuit voltage, and, during a charging process of the traction battery, controlling the traction battery to discharge or stop being charged in response to the battery parameter changing by a parameter gap value. The parameter gap value is a first preset parameter gap value in a scenario in which the battery parameter of the traction battery is in a first parameter interval, and is a second preset parameter gap value in a scenario in which the battery parameter of the traction battery is in a second parameter interval. The first preset parameter gap value is greater than the second preset parameter gap value, and the battery parameter in the first parameter interval is less than the battery parameter in the second parameter interval.