摘要
电池一致性是车用动力蓄电池在成组应用中的关键问题。该文将单体电池的寿命模型和热模型与等效电路模型相结合,用于研究电池组中由于不一致的衰减速度而导致的组内电池性能参数的差异。研究结果表明:在不同的工况条件下,不一致的变化规律各有特点。其中,电池的极化现象与温度密切相关,并对单体电池的老化有着明显的影响。单体电池容量差异与极化差异应当在动力电池成组时予以同时考虑。该方法可以被应用于电池组的设计、电池分选以及电池成组阶段。
Battery un-uniformity is a critical problem for the battery pack in the automotive powertrain application. Life model and thermal model were combined with the equivalent circuit model （ECM） to analyze the divergence caused by the un-uniformity decay rate between the cells in the battery pack. The results show different trends of decay for different working conditions. The temperature which has a close relationship with the polarization process has a significant impact on the decay rate. Both capacity variation and polarization variation should be considered in the cell selection during the battery pack assembly. The method can be applied to the cell selection during the battery pack design and assembly phases.
出处
《汽车安全与节能学报》
CAS
2011年第3期223-228,共6页
Journal of Automotive Safety and Energy
基金
Doctoral Fund of Ministry of Education of China~~
关键词
电池一致性
等效电路模型
电池老化
汽车电源
battery uniformity
equivalent circuit model （ECM）
lifespan decay
automotive power source
