公开(公告)号：US20210215770A1

公开(公告)日：2021-07-15

申请号：US16743839

申请日：2020-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Charles W. Wampler ,  Alfred Zhang

IPC: G01R31/392 ,  G01R31/3828 ,  G01R31/374 ,  G01R31/3842

Abstract: A method for battery capacity estimation is provided. The method includes, within a computerized processor, monitoring a sensor operable to gather data regarding a battery, determining a voltage-based state of charge for the battery based upon the data from the sensor, determining a capacity degradation value for the battery based upon the data from the sensor, determining an integrated current value through Coulomb counting based upon the data from the sensor, determining a predicted battery state of charge for the battery based upon the capacity degradation value and the integrated current value, processing the voltage-based state of charge and the predicted battery state of charge using a Kalman filter to generate an updated overall battery capacity estimate, and using the updated overall battery capacity estimate to control management of the battery.

公开(公告)号：US20210215768A1

公开(公告)日：2021-07-15

申请号：US16743848

申请日：2020-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alfred Zhang ,  Justin Bunnell ,  Garrett M. Seeman ,  Jeffrey S. Piasecki ,  Charles W. Wampler ,  Brian J. Koch ,  Jing Gao ,  Jeffrey A. Bednar ,  Xiumei Guo ,  Justin R. McDade

IPC: G01R31/3832 ,  G01R31/3842 ,  G01R31/388 ,  H01M10/48 ,  H01M10/42

Abstract: A method for battery capacity estimation is provided. The method includes monitoring a sensor, collecting a plurality of data points including a voltage-based state of charge value and an integrated current value, defining within the data points a first data set collected during a first time period and a second data set collected during a second time period, determining an integrated current error related to the second data set, comparing the integrated current error related to the second data set to a threshold integrated current error. When the error related to the second data set exceeds the threshold, the method further includes resetting the second data set based upon an integrated current value from the first time period. The method further includes combining the data sets to create a combined data set and determining a voltage slope capacity estimate as a change in integrated current versus voltage-based state of charge.

公开(公告)号：US10317473B2

公开(公告)日：2019-06-11

申请号：US15220985

申请日：2016-07-27

Applicant: GM Global Technology Operations LLC

Inventor： Shuoqin Wang ,  Charles W. Wampler ,  Mark W. Verbrugge ,  Luan Vu

IPC: G01R31/36 ,  G01R31/367 ,  G01R31/374 ,  G01R35/00

Abstract: A number of illustrative variations may include a method, which may include obtaining terminal voltage data of a electrochemical device; determining an equivalent circuit model which operates in a manner approximating the terminal voltage data comprising an open circuit voltage VOC comprising a constant voltage source V0 and a voltage Vs across a capacitor Cs, in series with an overpotential circuit comprising an overpotential voltage V1; determining at least one of the power capabilities of the equivalent circuit model; and, estimating at least one of the power capabilities of the electrochemical device based upon the determined power capabilities of the equivalent circuit model.

公开(公告)号：US20160039419A1

公开(公告)日：2016-02-11

申请号：US14887926

申请日：2015-10-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Charles W. Wampler ,  Mark W. Verbrugge ,  Brian J. Koch ,  Patricia M. Laskowsky

IPC: B60W30/188 ,  B60W40/12 ,  B60W10/192 ,  B60W10/02 ,  G01R31/36 ,  B60W10/26

CPC classification number: G01R31/367 ,  B60W10/192 ,  B60W10/26 ,  B60W40/12 ,  G01R31/36 ,  G01R31/382 ,  G01R31/3842 ,  G01R31/392 ,  H01M10/4285 ,  H01M10/48 ,  H01M2220/20

Abstract: Systems and methods are disclosed for estimating a state of a battery system such as a current-limited state of power and/or a voltage-limited state of power using a battery system model incorporating a nonlinear resistance element. Parameters of elements included in a battery cell model associated with a nonlinear resistance of a battery cell may be directly parameterized and used in connection with state estimation methods. By accounting for the nonlinear effect, embodiments of the disclosed systems and methods may increase available battery power utilized in connection with battery system control and/or management decisions over a larger window of operating conditions.

Abstract translation: 公开了使用包含非线性电阻元件的电池系统模型来估计诸如限流电流状态和/或电压限制状态的电池系统的状态的系统和方法。 包括在与电池单元的非线性电阻相关联的电池单元模型中的元件的参数可以直接参数化并与状态估计方法一起使用。 通过考虑非线性效应，所公开的系统和方法的实施例可以在更大的操作条件窗口上增加与电池系统控制和/或管理决策有关的可用电池电量。