Details

Autor(en) / Beteiligte

• Lin, Xinfan
• Perez, Hector E.
• Mohan, Shankar
• Siegel, Jason B.
• Stefanopoulou, Anna G.
• Ding, Yi
• Castanier, Matthew P.

Titel

A lumped-parameter electro-thermal model for cylindrical batteries

Ist Teil von

• Journal of power sources, 2014-07, Vol.257, p.1-11

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Combining several existing lumped-parameter models, this paper presents an electro-thermal model for cylindrical batteries. The model consists of two sub-models, an equivalent-circuit electrical model and a two-state thermal model which are coupled through heat generation and temperature dependence of the electrical parameters. The computationally efficient 5-state model captures the state of charge (SOC), terminal voltage, surface temperature and the often neglected core temperature of a battery for wide range of operating conditions. The proposed parameterization scheme allows separate identification of the electric and thermal sub-models, greatly reducing the complexity of the parameterization process. The methodology is applied to a LiFePO4/graphite battery. Comparison with the electrochemical impedance spectroscopy data clarifies the frequency range of the model fidelity. The model is further validated with two drive-cycle tests, covering SOC range 25%–100%, temperature 5 °C–38 °C, and maximum C-rate of 22C. •An electro-thermal model capturing battery SOC, voltage, skin and core temperature.•A convenient parameterization method identifying the two sub-models separately.•Validation of the identified model with electrochemical impedance spectroscopy.•Experimental validation with cycles covering 20–100% SOC, 5–38 °C, and max C-rate 20C.