基于BMS的锂离子电池建模方法综述

被引:93
作者
梁新成 [1 ]
张勉 [1 ]
黄国钧 [2 ]
机构
[1] 西南大学工程技术学院
[2] 西南大学人工智能学院
关键词
锂电池; 电池管理系统; 建模方法;
D O I
10.19799/j.cnki.2095-4239.2020.0166
中图分类号
TM912 [蓄电池];
学科分类号
080802 [电力系统及其自动化];
摘要
电池管理系统(battery management system, BMS)是电动车辆的技术核心,而精确的电池模型是实现BMS的关键。电池模型的精度与材料、环境温度、工作模式、老化程度等密切相关,而在建模时完整地包含上述因素是非常困难的。本文在简单介绍BMS功能和结构的基础上,通过对近几年锂离子电池建模文献的整理,着重介绍了电学特性模型、热模型及电-热耦合模型的建模方法。由于电-热模型综合了其他两种方法的优点,模型相对简单且在实际中使用较多。在此基础上阐述了三种模型在电池内部状态如电池荷电状态(state of charge,SOC)、电池健康状态(state of health, SOH)、温度等参数估计中的应用。特别是SOH的状态估计,除受电流、温度、SOC等因素影响外,还与机械振动及过电势等密切相关。考虑到状态估计变量之间的相互耦合如电池的SOC、内部温度等,故需进一步提高耦合参数的估计精度以确保BMS工作的可靠性。在未来,还需要继续对模型进行降阶,以实现BMS工作的实时性。
引用
收藏
页码:1933 / 1939
页数:7
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