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    • 3. 发明授权
    • Battery capacity calculating method and device therefor
    • 电池容量计算方法及其装置
    • US06661231B1
    • 2003-12-09
    • US09856467
    • 2001-10-09
    • Youichi AraiTsutomu SaigoHideaki Kamohara
    • Youichi AraiTsutomu SaigoHideaki Kamohara
    • G01N27416
    • G01R31/3624G01R31/3648G01R31/3675
    • A method and apparatus are provided, by which a state of charge of a battery is accurately computed without being influenced by the polarization effect. An estimated voltage of the battery 13 in a constant load discharge with a predetermined large current value is estimated from a voltage-current characteristic when the discharge current of the constant load discharging process by the battery 13 that is in an equilibrium state is decreasing from the predetermined large current value corresponding to a maximum supplying electric power to the load. A difference between the estimated voltage and an open circuit voltage, which estimates the estimated voltage and is a terminal voltage of the battery 13 that is in an equilibrium state before the start of the constant load discharge by using the predetermined large current value, is calculated. Then, the difference is memorized by first memory means 27 for memorizing a residual voltage drop defining as the residual voltage drop due to a residual polarization at the end of the discharging process of the battery 13. The residual voltage drop memorized by the first memory means 27 is added to the estimated voltage of the battery 13, thereby a present charging capacity of the battery 13 is computed.
    • 提供了一种方法和装置,通过该方法和装置可以精确地计算电池的充电状态而不受偏振效应的影响。 当处于平衡状态的电池13的恒定负载放电过程的放电电流从电池电流特性减小时,从电压 - 电流特性估计具有预定大电流值的恒定负载放电中的电池13的估计电压 预定的大电流值对应于向负载提供电力的最大值。 计算估计电压和开路电压之间的差异,该电压估算出通过使用预定大电流值在恒定负载放电开始之前处于平衡状态的电池13的估计电压并且是其终端电压 。 然后,差值由第一存储装置27存储,用于存储由于在电池13的放电过程结束时由于残余极化而定义为残余电压降的残余电压降。由第一存储装置存储的剩余电压降 27被添加到电池13的估计电压,由此计算电池13的当前充电容量。