A comparative study on RC models of lithium-ion battery

Author

Si Li ; Ximing Cheng

Author_Institution

Sch. of Mech. Eng., Beijing Inst. of Technol.; Nat. Eng., Beijing, China

fYear

2014

fDate

Aug. 31 2014-Sept. 3 2014

Firstpage

1

Lastpage

4

Abstract

In the rest, two equivalent circuit models, the first-order resistance-capacitance (RC) model and the second-order RC model, were investigated for a lithium-ion battery. The Gauss-Newton (G-N) least square was applied to identify the two model parameters because of its nonlinear estimation and iteration. The lithium-ion battery rested respectively at three SOC points as 20%, 50%, and 80%. Results show that the second-order RC model presents better approximation for the real battery terminal voltage than the first-order whether the battery charges or discharges.

Keywords

RC circuits; equivalent circuits; iterative methods; least squares approximations; secondary cells; Gauss-Newton least square; RC models; SOC points; equivalent circuit models; first-order resistance-capacitance model; lithium-ion battery; nonlinear estimation; nonlinear iteration; real battery terminal voltage; second-order RC model; Batteries; Equations; Equivalent circuits; Integrated circuit modeling; Least squares approximations; Mathematical model; System-on-chip; Gauss-Newton least square; equivalent circuit model; lithium-ion battery; parameter identification;

fLanguage

English

Publisher

ieee

Conference_Titel

Transportation Electrification Asia-Pacific (ITEC Asia-Pacific), 2014 IEEE Conference and Expo

Conference_Location

Beijing

Print_ISBN

978-1-4799-4240-4

Type

conf

DOI

10.1109/ITEC-AP.2014.6940818

Filename

6940818