公开(公告)号：US5703486A

公开(公告)日：1997-12-30

申请号：US517272

申请日：1995-08-21

申请人： Youichi Arai ,  Brendan O'Toole ,  Tsutomu Saigo ,  Kenichi Shimoyama ,  Ryo Kumagai ,  Yoshihide Takada

发明人： Youichi Arai ,  Brendan O'Toole ,  Tsutomu Saigo ,  Kenichi Shimoyama ,  Ryo Kumagai ,  Yoshihide Takada

IPC分类号： G01R19/00 ,  G01R31/00 ,  G01R31/36 ,  G01N27/46

CPC分类号： G01R31/361 ,  G01R31/3651 ,  Y10S320/21

摘要： A voltage sensor detects a terminal voltage of a battery connected to a load and a current sensor detects a current flowing through the load. A voltage-current changing tendency calculation unit reads a detected voltage and a detected current detected by the voltage sensor and the current sensor and outputs, every predetermined period of time, plural data of the detected voltage and the corresponding detected current as dispersed data. A voltage-current approximating line calculation unit inputs the dispersed data and determines, based on the dispersed data, a voltage-current approximating linear function each time the predetermined period of time. A battery remaining capacity calculation unit determines, each time the voltage-current approximating linear function is determined, a remaining capacity of the battery based on the voltage-current approximating linear function. Particularly the voltage-current approximating line calculation unit determines the voltage-current approximating linear function by applying a method of least squares to the plural data of the voltage and the corresponding current of the dispersed data.

摘要翻译： 电压传感器检测连接到负载的电池的端子电压，并且电流传感器检测流过负载的电流。 电压电流变化趋势计算单元读取由电压传感器和电流传感器检测到的检测电压和检测电流，并且每隔预定时间周期将检测电压的多个数据和相应的检测电流作为分散数据输出。 电压 - 电流近似线计算单元输入分散的数据，并且每当预定的时间段基于分散的数据确定电压 - 电流近似线性函数。 电池剩余容量计算单元在每次确定电压 - 电流近似线性函数时确定基于电压 - 电流近似线性函数的电池的剩余容量。 特别地，电压 - 电流近似线计算单元通过对分散数据的电压和相应电流的多个数据应用最小二乘法来确定电压 - 电流近似线性函数。