The invention provides a battery management system, a battery pack, an electric vehicle, and a battery management method. The battery management system includes: a sensing unit for detecting a terminal voltage and a charge/discharge current of a battery having a characteristic in which a voltage change section changes according to a current rate; a memory unit for storing a first Kalman filter using an equivalent circuit model and a state of charge (SOC)-open circuit voltage curve of the battery and a second Kalman filter using a constant current charge/discharge map of the battery; and a control unit for determining a first estimated SOC by inputting the voltage value of the terminal voltage, the current value of the charge/discharge current, and the estimated SOC in the previous cycle to a first Kalman filter, and determining a second estimated SOC by inputting the current value and the estimated SOC in the previous cycle to a second Kalman filter.
提供了一种电池管理系统、电池组、电动车辆和电池管理方法。该电池管理系统包括:传感单元,其用于检测具有电压变化区段根据电流速率改变的特性的电池的端电压和充电/放电电流;存储器单元,其用于存储使用电池的等效电路模型和充电状态(SOC)‑开路电压曲线的第一卡尔曼滤波器和使用电池的恒定电流充电/放电图的第二卡尔曼滤波器;以及控制单元,其用于通过将端电压的电压值、充电/放电电流的电流值和上一个循环中的估计的SOC输入到第一卡尔曼滤波器来确定第一估计的SOC,通过将电流值和上一个循环中的估计的SOC输入到第二卡尔曼滤波器来确定第二估计的SOC。
Battery management system, battery pack, electric vehicle, and battery management method
电池管理系统、电池组、电动车辆和电池管理方法
2025-02-28
Patent
Electronic Resource
Chinese
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