论文标题
基于电荷的电压校正状态
Voltage-Based State of Charge Correction at Charge-End
论文作者
论文摘要
提出了一种基于电压的方法，以纠正电荷端的电池组状态（SOC）估计。两个主要特征使充电末端时间跨度成为纠正SOC估计的好机会：首先，由于BMS设计器的充电曲线已知，而且在电荷端时跨度范围很小，电池的最后阶段很容易检测到电池的最后阶段。其次，随着电池电池的充电末端，我们知道真正的SOC接近100％。本文提出了一种利用这些重要功能来纠正SOC估计误差的方法。使用电压阈值方法，该算法检测到电池何时接近电荷端，以激活电荷末端SOC校正策略。一旦激活，该策略就会使用最大电池电压纠正SOC，以确保充电后SOC为100％。校正量是最大电池电压和电荷电流C率的函数。
A voltage-based method is proposed to correct battery pack state of charge (SOC) estimation at the charge-end. Two main characteristics make the charge-end time span a good opportunity to correct SOC estimation: first, it is easy to detect when the battery is at the last stage of charging because the charging profile is known to the BMS designer and also during the charge-end time span the amount of current is low, and the terminal voltage of the battery cells are high; second, as the battery reaches the charge-end stage, we know that the true SOC is approaching to 100%. This paper presents a method to utilize these important features to correct the SOC estimation error. Using a voltage threshold method, the algorithm detects when the battery is close to the charge-end to activate the charge-end SOC correction strategy. Once activated, the strategy corrects the SOC using the maximum cell voltage to guarantee that SOC is 100% when charging is complete. The amount of correction is a function of maximum cell voltage and the charge current C-rate.
