Title :
A new equivalent circuit model of Ni-MH battery pack based on the subspace identification method
Author :
Haolin Liu ; Bojin Qi ; Minxin Zheng
Author_Institution :
Sch. of Mech. Eng. & Autom., Beihang Univ., Beijing, China
fDate :
Aug. 31 2014-Sept. 3 2014
Abstract :
Battery model is the foundation for estimating the state of the battery energy, and it is also an important basis for the simulation of the electric vehicle´s dynamic performance. Therefore, an accurate and suitable battery model is of important practical significance on the development of electric vehicles. In this paper, according to the dynamic characteristics of Ni-MH battery during the charge and discharge process, subspace identification method was adopted to set up a state-space model of the battery. Through the analysis of the model output voltage, a battery equivalent circuit model was built, and the model parameters could be identified by the least square method. Finally, the accuracy of the battery model was verified by the experiment.
Keywords :
battery charge measurement; battery powered vehicles; equivalent circuits; least squares approximations; nickel; secondary cells; Ni-MH battery pack; battery equivalent circuit model; battery state-space model; least square method; subspace identification; Analytical models; Batteries; Equations; Equivalent circuits; Integrated circuit modeling; Mathematical model; Voltage measurement; Electric vehicle; Equivalent circuit model; Ni-MH battery; Subspace identification;
Conference_Titel :
Transportation Electrification Asia-Pacific (ITEC Asia-Pacific), 2014 IEEE Conference and Expo
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-4240-4
DOI :
10.1109/ITEC-AP.2014.6940976
