Enhanced Battery Pack for Electric Vehicle: Noise Reduction and Increased Stiffness

Abstract:

Vibration and the noise through vibration have always been major topics for the design of vehicles. An electric vehicle presents different challenges to a conventional driven vehicle, as a combustion engine produces different exciter frequencies. In this work, the Finite Element (FE) Optimisation software OptiStruct [1] was used to optimise the battery pack design to raise the natural frequencies of the battery housing above the range of model vehicle exciter frequencies. The new design increased the stiffness of the battery pack. Additionally, there was a reduction in wall thickness and a corresponding weight reduction of almost 20%.

• Periodical: Materials Science Forum (Volume 765)
• Pages: 818-822
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.765.818
• Online since: July 2013
• Authors: Matthias Hartmann, Martin Roschitz, Ziad Khalil
• Keywords: Electric Vehicle (EV), Lithium-Ion Battery Pack, Numerical Simulation, Optimization

References

[1] HyperWorks 11. Altair OptiStruct Manual.

[2] M. Hartmann, P. Simon, M. Roschitz, Z. Khalil, Numerical investigation of a hybrid space frame structure for electric driven vehicles of the l7e class, ANSYS Conference & 29. CADFEM Users´ Meeting, 2011.

[3] Ch. Chimani, M. Hartmann, P. Simon, M. Roschitz, Z. Khalil, Light weight design of Al-Mg hybrid space frames for urban e-vehicles, A3PS Austrian Agency for Alternative Propulsion Systems, 2011.

[4] John Q. Hallquist, LS-DYNA Theory Manual. Livermore Software Technology Corporation, March 2006.