Thermo-electric simulation of battery-modules with reduced order modelling of linear electrical components

• Franz Pichler ^[1] ; Niels Koester ^[1] ; Alexander Thaler ^[1]
  1. [1] VIRTUAL VEHICLE Research Center
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 36, Nº 5 (Special Issue: IGTE 2016), 2017, págs. 1488-1500
• Idioma: inglés
• DOI: 10.1108/compel-02-2017-0075
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• Resumen

  • Purpose This paper aims to present a fully coupled thermo-electrical finite-element battery model with an applied model-order reduction. The model is used to analyse the thermal design of battery modules during typical drive-cycles of electric vehicles.

    Design/methodology/approach A model-order reduction is applied, in which the electrical linear bus-bars are analysed in an a-priori step. For these bus-bars, special distributed basis-functions are computed, which make the solution of differential Ohm's law unnecessary during the transient simulation. Furthermore, the distributed basis-functions are used to strongly couple the non-linear battery models, which reduces the iterations needed to simulate them.

    Findings Altogether, this results in a fast simulation scheme for coupled linear and non-linear electrical components and their thermal behaviour.

    Originality/value The presented method delivers an innovative approach, on how to systematically minimize the computational effort in a system of linear and non-linear electrical components, while keeping the full three-dimensional information of the original problem.