发明授权
US09130248B2 Modeling changes in the state-of-charge open circuit voltage curve by using regressed parameters in a reduced order physics based model
有权
通过使用基于退化物理学的模型中的回归参数来建模充电状态开路电压曲线的变化
- 专利标题： Modeling changes in the state-of-charge open circuit voltage curve by using regressed parameters in a reduced order physics based model
- 专利标题（中）： 通过使用基于退化物理学的模型中的回归参数来建模充电状态开路电压曲线的变化
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申请号： US13481290申请日： 2012-05-25
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公开(公告)号： US09130248B2公开(公告)日： 2015-09-08
- 发明人: Patricia M. Laskowsky , Brian J. Koch , Damon R. Frisch , Ramesh Rebba , Kurt M. Johnson
- 申请人： Patricia M. Laskowsky , Brian J. Koch , Damon R. Frisch , Ramesh Rebba , Kurt M. Johnson
- 申请人地址： US MI Detroit
- 专利权人： GM Global Technology Operations LLC
- 当前专利权人： GM Global Technology Operations LLC
- 当前专利权人地址： US MI Detroit
- 代理机构： Miller IP Group, PLC
- 代理商 John A. Miller
- 主分类号： H01M10/48
- IPC分类号： H01M10/48 ; B60L11/18 ; G01R31/36 ; H01M10/0525
摘要：
A method for modeling changes in the state of charge vs. open circuit voltage (SOC-OCV) curve for a lithium-ion battery cell as it ages. During battery pack charging, voltage and current data are gathered for a battery cell. A set of state equations are used to determine the stoichiometry and state of charge of the cathode half-cell based on the charging current profile over time. The voltage and current data, along with the stoichiometry and state of charge of the cathode half-cell, are then used to estimate maximum and minimum solid concentration values at the anode, using an error function parameter regression/optimization. With stoichiometric conditions at both the cathode and anode calculated, the cell's capacity and a new SOC-OCV curve can be determined.
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