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中文摘要：
提出了一种新的电池荷电状态（SOC）的估计方法。电池的开路电压（OCV）与SOC之间是一种分段线性的关系,为了避开这类非线性问题,观测器设计时的通行做法是将输出电压的方程式对时间进行求导。文中分析表明这种对电压方程求导的做法是不正确的。指出可以将分段线性关系看做是广义系统中的一种线性约束,从而提出用广义系统观点来处理电池的这个分段线性约束,并且设计了广义系统观测器。仿真结果表明所提出的观测器的有效性。
英文摘要：
A new method for battery state-of-charge（ SOC） estimation was proposed. To avoid the difficulties in treating the piecewise linear relationship between the open-circuit voltage（ OCV） of the battery and the SOC,the popular approach for the observer design is to take the time derivative of the equation of the output voltage. It shows that the design of the observer by taking the time derivative of the voltage equation is incorrect. It is pointed out that the piecewise linear relationship can be considered as a linear constraint of a descriptor system. So the descriptor system approach was proposed to cope with this piecewise linear constraint. And the descriptor system observer was then designed. Simulation shows the effectiveness of the proposed method.
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