Modeling and Real Time Estimation of Lumped Equivalent Circuit Model of a Lithium Ion Battery

Author

Lee, Jaemoon ; Lee, Jaeho ; Nam, Onyong ; Kim, Jonghun ; Cho, Bo Hyung ; Yun, Han-Seok ; Choi, Soo-Seok ; Kim, KiHo ; Kim, J.H. ; Jun, Sonu

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ.

fYear

2006

fDate

Aug. 30 2006-Sept. 1 2006

Firstpage

1536

Lastpage

1540

Abstract

In this paper, a real time estimate of a battery model is proposed. The existing impedance model is accurate in predicting the behavior of a battery. However, it is complex and not applicable for real time applications. Also, it requires much time and cost to obtain the parameters of the model. A simple lumped circuit model is presented. The parameters and states (overvoltages) of the battery are estimated with a filtering technique and system identification theory. It is verified through simulations and experiments that the proposed method is in good agreement with the dynamic characteristics of the battery, regardless of the conditions of the battery, and the estimated overvoltages are given physical meanings through a comparison with an impedance model with complex RC ladder circuits

Keywords

equivalent circuits; filtering theory; lumped parameter networks; parameter estimation; secondary cells; filtering technique; identification theory; lithium ion battery; lumped equivalent circuit; overvoltages; parameter estimation; Batteries; Costs; Equivalent circuits; Filtering theory; Impedance; Lithium; Predictive models; State estimation; Surges; System identification;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Motion Control Conference, 2006. EPE-PEMC 2006. 12th International

Conference_Location

Portoroz

Print_ISBN

1-4244-0121-6

Type

conf

DOI

10.1109/EPEPEMC.2006.4778621

Filename

4778621