公开(公告)号：US20240361397A1

公开(公告)日：2024-10-31

申请号：US18556267

申请日：2022-03-10

申请人： AVILOO GmbH

发明人： Wolfgang BERGER ,  Nikolaus MAYERHOFER

IPC分类号： G01R31/392 ,  B60L58/12 ,  B60L58/16 ,  G01R31/367 ,  G01R31/388

CPC分类号： G01R31/392 ,  B60L58/12 ,  B60L58/16 ,  G01R31/367 ,  G01R31/388 ,  B60L2240/545 ,  B60L2240/547 ,  B60L2240/549 ,  B60L2240/70

摘要： A method for ascertaining the state of health of the vehicle battery of an electric vehicle includes charging the vehicle battery and ascertaining specified battery parameters during the charging process, and calculating the state of health of the vehicle battery using a vehicle-specific battery model on the basis of the transmitted battery parameters. A basic battery model, which is based on the vehicle battery type, in the form of an electric equivalent circuit model is first used as the vehicle-specific battery model, wherein the internal resistance and RC elements are ascertained as a function of the cell temperature and the charge state, an open circuit voltage characteristic is ascertained as a function of the charge state, and the cell temperature is ascertained using a thermal model on the basis of the measured battery pack current, EC parameters, the battery module temperature, and the ambient temperature.