电动汽车用动力镍氢电池SOC建模与仿真

Mathematic Model and Simulation Analysis on NiMH Battery in Electric Vehicle and Its SOC Estimation

设计了一套镍氢电池充放电试验建模方案,对其充放电特性进行了研究和分析;得出了一系列镍氢电池的开路电压测试曲线;提出了一种考虑了温度对电池参数影响的集总参数等效电路模型。在此基础上,建立了一种基于状态空间的SOC递推算法,对镍氢电池的SOC值进行了仿真分析。

A set of experiments were designed to analyze and study the charging and discharging characteristics of the nickel hydrogen battery. A series of open - circuit voltage test curves of nickel hydrogen battery were obtained. A lumped parameter circuit model for the nickel hydrogen battery was presented with the consideration of temperature effect. On this basis, an associated recursive algorithm for estimating the state of charge （SOC） of battery based on state space was established to make some simulation on charging and discharging processes of the battery. The experiment on vehicle proves that this method can obtain the precise and reliable SOC static predictive value.