Research Papers

Parameterization of Battery Electrothermal Models Coupled With Finite Element Flow Models for Cooling

[+] Author and Article Information
Nassim A. Samad

Department of Mechanical Engineering,
University of Michigan,
Ann Arbor, MI 48109
e-mail: nassimab@umich.edu

Boyun Wang

Department of Mechanical Engineering,
University of Michigan,
Ann Arbor, MI 48109
e-mail: bywang@umich.edu

Jason B. Siegel

Department of Mechanical Engineering,
University of Michigan,
Ann Arbor, MI 48109
e-mail: siegeljb@umich.edu

Anna G. Stefanopoulou

Fellow ASME
William Clay Ford Professor of Manufacturing
Mechanical Engineering,
Automotive Research Center,
University of Michigan,
Ann Arbor, MI 48109
e-mail: annastef@umich.edu

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received October 6, 2015; final manuscript received December 19, 2016; published online May 9, 2017. Assoc. Editor: Beshah Ayalew.

J. Dyn. Sys., Meas., Control 139(7), 071003 (May 09, 2017) (13 pages) Paper No: DS-15-1490; doi: 10.1115/1.4035742 History: Received October 06, 2015; Revised December 19, 2016

Developing and parameterizing models that accurately predict the battery voltage and temperature in a vehicle battery pack are challenging due to the complex geometries of the airflow that influence the convective heat transfer. This paper addresses the difficulty in parameterizing low-order models which rely on coupling with finite element simulations. First, we propose a methodology to couple the parameterization of an equivalent circuit model (ECM) for both the electrical and thermal battery behavior with a finite element model (FEM) for the parameterization of the convective cooling of the airflow. In air-cooled battery packs with complex geometries and cooling channels, an FEM can provide the physics basis for the parameterization of the ECM that might have different convective coefficients between the cells depending on the airflow patterns. The second major contribution of this work includes validation of the ECM against the data collected from a three-cell fixture that emulates a segment of the pack with relevant cooling conditions for a hybrid vehicle. The validation is performed using an array of thin film temperature sensors covering the surface of the cell. Experiments with pulsing currents and drive cycles are used for validation over a wide range of operating conditions (ambient temperature, state of charge, current amplitude, and pulse width).

Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Fig. 1

Three-cell fixture used in experiments showing placement of RTD sensors on spacer

Grahic Jump Location
Fig. 2

Five-layered mesh for the thermal model

Grahic Jump Location
Fig. 3

Double RC model representing an electrical node

Grahic Jump Location
Fig. 4

Current profile used for electrical parameterization

Grahic Jump Location
Fig. 5

Voltage fit and error for single, double, and triple RC models at: (a) 30% SOC, (b) 50% SOC, (c) 70% SOC at 25 °C, and using 5A current pulse

Grahic Jump Location
Fig. 6

Electrical parameters Rs, R1, C1, R2, and C2 as a function of SOC and temperature

Grahic Jump Location
Fig. 7

Time constants for both RC pairs at different temperatures

Grahic Jump Location
Fig. 8

Entropy slope dU/dT as a function of SOC as measured during discharge at 25 °C

Grahic Jump Location
Fig. 10

Current profile used for thermal parameterization at 25 °C and the corresponding measured surface temperatures

Grahic Jump Location
Fig. 11

Three-dimensional FEM of the three-cell fixture

Grahic Jump Location
Fig. 12

Location of the sensors on the surface of the cell and the cell surface temperature distribution for 39 Å cycling case

Grahic Jump Location
Fig. 13

Numerical model parameterization process using the optimization logic defined in Eq. (11)

Grahic Jump Location
Fig. 14

Temperature rise at steady-state at the 36 sensor locations using COMSOL, ETM, and experimental data using a 20 Å, 39 Å, and 50 Å excitation profiles

Grahic Jump Location
Fig. 15

Pulse validation experiment at 25 °C, 75% SOC, and 25 Å current amplitude

Grahic Jump Location
Fig. 16

Simulated and experimental electrothermal behavior during a hybrid power split for a US06 drive cycle at 25 °C

Grahic Jump Location
Fig. 17

Simulated and experimental electrothermal behavior during a hybrid power split for an urban assault drive cycle 25 °C




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In