Parameterization and Validation of an Integrated Electro-Thermal LFP Battery Model

Abstract

In this paper the parameterization of an integrated electro-thermal model for an A123 26650 LiFePO4 battery is presented. The electrical dynamics of the cell are described by an equivalent circuit model. The resistances and capacitances of the equivalent circuit model are identified at different temperatures and SOC?s, for charging and discharging. Functions are chosen to characterize the fitted parameters. A two-state thermal model is used to capture the core and surface temperatures of the battery. The electrical model is coupled with the thermal model through heat generation. Parameters of the thermal model are identified using a least squares algorithm. The electro-thermal model is then validated against voltage and surface temperature measurements from a realistic drive cycle experiment.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2012
Accession Number
ADA559825

Entities

People

  • Hector E. Perez
  • Jason B. Siegel
  • Matthew P. Castanier
  • Xinfan Lin
  • Yi Ding

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Capacitors
  • Chemical Kinetics
  • Demographic Cohorts
  • Dynamics
  • Energy
  • Energy Storage
  • Equivalent Circuits
  • Lithium Ion Batteries
  • Measurement
  • Mechanical Engineering
  • Physical Properties
  • Resistance
  • Surface Temperature
  • Terminals
  • Vehicles

Fields of Study

  • Engineering

Readers

  • Battery Technology and Engineering
  • Computational Modeling and Simulation
  • Integrated Circuit Design and Technology.