摘要
动力锂离子电池测试既要考虑安全性、便捷性,也要考虑测试时间和硬件成本等因素。在保证测试精度前提下,将非线性电池模型与电力电子开关器件相结合,基于三阶RC等效电路模型,采用交错并联Buck-boost变换器作为电池模拟器的主电路拓扑,实现对真实动力电池的替代测试。首先分析了电池等效电路模型及其参数辨识原理。其次研究了电池模拟器工作原理和双向交错并联Buck-boost变换器控制策略,并设计了控制器参数。最后搭建了电池模拟器试验平台,试验结果表明该电池模拟器可以较高精度地实现对电池伏安外特性的模拟,可以满足对动力锂离子电池的测试需求。
Factors such as safety,convenience,test time and hardware cost should be taken into consideration when testing power lithium battery.The nonlinear battery model is combined with the power electronic switching device under the premise of ensuring the test accuracy.Based on the third-order RC battery model,the staggered parallel buck-boost converter is used as the main circuit topology of the battery simulator to replace the real power battery.Firstly,the battery equivalent circuit model and its parameter identification principle are analyzed.Secondly,the operating principle of the battery simulator and the control strategy of the bidirectional staggered parallel Buck-boost converter are studied,and the controller parameters are designed.Finally,an experimental platform for battery simulator is built.The experimental results show that the battery simulator can simulate the external volt-ampere characteristics of the battery with high accuracy and meet the test requirements for lithium ion power battery.
作者
孙向东
李聪
杨欢
张琦
SUN Xiangdong;LI Cong;YANG Huan;ZHANG Qi(School of Electrical Engineering,Xi’an University of Technology,Xi’an 710048)
出处
《电气工程学报》
CSCD
北大核心
2024年第2期279-287,共9页
Journal of Electrical Engineering
基金
陕西省自然科学基金资助项目(2020JM-449)。
