Evaluation method of the crash safety of traction batteries for electric driven motorcycles

Methode zur Bewertung der Crashsicherheit von Traktionsbatterien elektrisch betriebener Motorraeder

In case of damage of an electrical energy storage system (EESS), in particular lithium-ion based traction batteries, considerable hazards for people and the environment can occur. This issue is widely investigated in case of passenger cars; however, this research field is still in its early stages when it comes to electric driven motorcycles. Therefore, the goal of this study is the generation of an overall valid safety evaluation method for the EESS, which can also be actively applied for the optimization of its safety in case of crash. In particular, the crash safety should be increased without a reduction of the system functionality. Due to the different boundary conditions, the direct application of the results of the studies on electric passenger cars is not possible. In order to define critical accident scenarios for the traction battery of electric motorcycles, the starting point is the analysis of real accidents data. This investigation was developed with assistance of descriptive statistics, statistical evaluations, in-depth analyses and computer-aided reconstruction of real accidents. Based on these investigations, the focus of the successive analyses is on critical energy storage system loads. In order to determine the loads on the traction battery in critical scenarios, a series of full-scale crash tests with an electric motorcycle were developed. With this basis, it was possible to generate and perform further testing configurations for more detailed analyses at battery pack, which can reproduce the load boundaries of real accidents and therefore eventually substitute a complete vehicle crash test. With the results of the developed tests, a nonlinear explicit finite element model was build and validated in order to permit a deeper analysis of loads at single cell level of the traction battery. Moreover the range of the possible crash configurations that can be evaluated was enlarged. With these simulations, it was possible to extend the investigated load configurations beyond the real tested crash scenarios and to ensure the crash safety of an electric motorcycle. Thanks to the results of the analysis, electric driven motorcycles can undergo a safer design regarding possible loads on the traction batteries in crash situations. In this study also suggestions are provided for the application of an optimization process, capable of increasing the functionality (range, weight, etc.) in future developments of EESSs as well as entire electric driven motorcycles. (A)

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  • Corporate Authors:

    Institut fuer Zweiradsicherheit (ifz) e.V.

    Gladbecker Str. 425
    Essen,   Germany  45329
  • Authors:
    • Ellersdorfer, C
    • Sevarin, A
    • Tomasch, E
    • Sinz, W
    • Ebner, A
    • Deitermann, N
    • Forster, M
  • Publication Date: 2016

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 401-20
  • Monograph Title: Sicherheit - Umwelt - Zukunft. Tagungsband der 11. Internationalen Motorradkonferenz 2016
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01670111
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD
  • Created Date: May 7 2018 8:11AM