Charging and discharging tests for obtaining an accurate dynamic electro-thermal model of high power lithium-ion pack system for hybrid and EV applications

Author

Mihet-Popa, Lucian ; Camacho, Oscar Mauricio Forero ; Norgard, Per Bromand

Author_Institution

Dept. of Electr. Eng., Tech. Univ. of Denmark-DTU, Roskilde, Denmark

fYear

2013

fDate

16-20 June 2013

Firstpage

1

Lastpage

6

Abstract

This paper presents a battery test platform including two Li-ion battery designed for hybrid and EV applications, and charging/discharging tests under different operating conditions carried out for developing an accurate dynamic electro-thermal model of a high power Li-ion battery pack system. The aim of the tests has been to study the impact of the battery degradation and to find out the dynamic characteristics of the cells including nonlinear open circuit voltage, series resistance and parallel transient circuit at different charge/discharge currents and cell temperature. An equivalent circuit model, based on the runtime battery model and the Thevenin circuit model, with parameters obtained from the tests and depending on SOC, current and temperature has been implemented in MATLAB/Simulink and Power Factory. A good alignment between simulations and measurements has been found.

Keywords

battery powered vehicles; equivalent circuits; hybrid electric vehicles; lithium; secondary cells; Li; Matlab-Simulink; SOC; Thevenin circuit model; discharging tests; dynamic electro-thermal model; equivalent circuit model; high power lithium-ion battery pack system; high power lithium-ion pack system; hybrid EV applications; nonlinear open circuit voltage; parallel transient circuit; power factory; runtime battery model; series resistance circuit; Batteries; Integrated circuit modeling; Mathematical model; System-on-chip; Temperature; Temperature dependence; Temperature measurement; Battery Electric Vehicle-BEV; Battery Management Unit (BMU); Distributed Energy Resources (DER); High Power Lithium-Cell Battery; State of Charge (SOC);

fLanguage

English

Publisher

ieee

Conference_Titel

PowerTech (POWERTECH), 2013 IEEE Grenoble

Conference_Location

Grenoble

Type

conf

DOI

10.1109/PTC.2013.6652363

Filename

6652363