摘要
针对传统的电池等效电路模型不能直观反映电化学极化和浓差极化对电池端电压影响的缺点,提出了改进的电池模型。依据电路理论,对电池放电、放电停歇、充电、充电停歇4个不同阶段的进行电路分析。通过公式推导,建立了一个带衰减因子的电动汽车镍氢电池分段数学模型。设计了脉冲充电及脉冲放电实验,给出了参数辨识方法。并对比模型预测数据与实测数据,结果表明模型预测数据接近实测数据,模型的精确度较高。
The classical battery equivalent circuit model has a shortcoming that it doesn＇ t reflect the effects caused by electrochemical polarization and concentration polarization to battery terminal voltage well. In this study, in order to overcome the shortcoming, the classical equivalent circuit model for Nickel metal hydride battery used in electric vehicles was improved. According to the circuit theory, the analysis was carried out for the four different phases of battery by the improved equivalent circuit model. Four different phases were charge phase, change idle phase, discharge phase, discharge idle phase, respectively. A new piecewise mathematical model with decay factor was deduced according to the equivalent circuit equation. Pulse discharge and charge experiments were designed, and identification method of parameters was introduced. Predicted data by the model and measured data were compared and the results show the predicted data matched the measured data very well. In addition, the model exhibits good precision.
出处
《电机与控制学报》
EI
CSCD
北大核心
2009年第A01期188-192,共5页
Electric Machines and Control
基金
国家"八六三"高技术项目(2003AA501324)
关键词
镍氢电池
极化
电路理论
衰减因子
电动汽车
分段数学模型
Nickel metal hydride battery
polarization
circuit theory
decay factor
electric vehicles
piecewise mathematical models
