公开(公告)号：US20120200298A1

公开(公告)日：2012-08-09

申请号：US13023748

申请日：2011-02-09

申请人： Yilu Zhang ,  Niannian Tong ,  Mutasim A. Salman ,  Kevin R. Bainbridge ,  David W. Walters

发明人： Yilu Zhang ,  Niannian Tong ,  Mutasim A. Salman ,  Kevin R. Bainbridge ,  David W. Walters

IPC分类号： G01N27/416

CPC分类号： H01M10/488 ,  G01R31/367 ,  G01R31/3835 ,  H01M10/44 ,  H01M10/48 ,  H01M10/486 ,  H01M2220/20

摘要： A method is provided for determining a state-of-charge of a battery for a vehicle. The vehicle is in a charging state when the engine is operating and a non-charging state when the engine is not operating. A first battery voltage is measured at a first predetermined time period after battery charging is discontinued in the non-charging state. A first temperature of the battery is measured that coincides with the first battery voltage. A second battery voltage is measured at a second predetermined time. The second predetermined time is greater than the first predetermined time. A second temperature of the battery is measured that coincides with the second battery voltage. An average temperature is calculated based on the first temperature measurement and the second temperature measurement. A fixed time constant is determined based on the average temperature. An open circuit voltage is estimated as a function of the first voltage measurement, the second voltage measurement, and the fixed time constant. A state-of-charge of the battery is determined based on the estimated open circuit voltage.

摘要翻译： 提供了一种用于确定用于车辆的电池的充电状态的方法。 当发动机运转时车辆处于充电状态，发动机不工作时处于非充电状态。 在非充电状态下中断电池充电之后，在第一预定时间段测量第一电池电压。 测量与第一电池电压一致的电池的第一温度。 在第二预定时间测量第二电池电压。 第二预定时间大于第一预定时间。 测量与第二电池电压一致的电池的第二温度。 基于第一温度测量和第二温度测量计算平均温度。 基于平均温度确定固定时间常数。 根据第一电压测量值，第二电压测量值和固定时间常数来估计开路电压。 基于估计的开路电压来确定电池的充电状态。