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    • 7. 发明申请
    • APPARATUS AND METHOD FOR ESTIMATING STATE OF HEALTH OF BATTERY BASED ON BATTERY VOLTAGE VARIATION PATTERN
    • 基于电池电压变化图的电池健康状况估算方法
    • WO2010016647A1
    • 2010-02-11
    • PCT/KR2009/001490
    • 2009-03-24
    • LG CHEM, LTD.KANG, Jung-SooKIM, Jee-HoKIM, Ju-YoungJUNG, Chang-Gi
    • KANG, Jung-SooKIM, Jee-HoKIM, Ju-YoungJUNG, Chang-Gi
    • G01R31/36
    • G01R31/3679G01R31/3613G01R31/3648
    • An apparatus estimates SOH of a battery based on a battery voltage variation pattern. A data storing unit obtains and stores battery voltage, current and temperature data from sensors, at each SOH estimation. A first SOC estimating unit estimates first SOC by current integration using the battery current data. A second SOC estimating unit estimates open-circuit voltage from the voltage variation pattern, and calculates and stores second SOC corresponding to the open-circuit voltage and temperature using correlations between the open-circuit voltage/temperature and SOC. A weighted mean convergence calculating unit calculates and stores convergence value for weighted mean value of ratio of the second SOC variation to the first SOC variation. A SOH estimating unit estimates capacity corresponding to the weighted mean convergence value using correlation between the weighted mean convergence value and the capacity, estimates relative ratio of the estimated capacity to an initial capacity, and stores it as SOH.
    • 设备基于电池电压变化模式估计电池的SOH。 在每次SOH估计时,数据存储单元获取并存储来自传感器的电池电压,电流和温度数据。 第一SOC估计单元使用电池电流数据通过电流积分来估计第一SOC。 第二SOC估计单元从电压变化模式估计开路电压,并且使用开路电压/温度和SOC之间的相关性来计算和存储与开路电压和温度相对应的第二SOC。 加权平均收敛计算单元计算并存储第二SOC变化率与第一SOC变量的加权平均值的收敛值。 SOH估计单元使用加权平均收敛值和容量之间的相关性来估计与加权平均收敛值相对应的容量,估计估计容量与初始容量的相对比率,并将其存储为SOH。