A1.1 - Potential of Impedance based Battery Diagnosis for Electro Mobility
- SENSOR+TEST Conferences 2011
2011-06-07 - 2011-06-09
- Proceedings SENSOR 2011
- A1 - Impedance Spectroscopy
- O. Kanoun, U. Tröltzsch, P. Büschel - Technische Universität Chemnitz (Germany)
- 28 - 33
The rapid adoption of electric vehicles in the near future will require significant efforts in the field of battery technology. An integral part of this is to provide a reliable diagnosis for a variety of information required.
Impedance spectroscopy is one suitable and efficient method to obtain the required information. It is able to provide information on the condition of the battery for use in the vehicle, for example by the battery management, and its ambience during the whole the product life cycle of the vehicle. Determination of state of charge or battery capacity can be supported by impedance spectroscopy. The driving range of the vehicle depending on load conditions can be determined by time domain simulations. The use of the battery can be controlled by also minimizing aging.
Various models for batteries can be used, for example, on the basis of ordinary, nonlinear differential equations, digital filters or equivalent circuits together with the corresponding methods for system identification in the time or frequency domain. Fast measurement methods of impedance spectra and stochastic methods for nonlinear parameter optimization are supporting a fast and reliable information retrieval. Thereby a significant advantage can be achieved over the prior art in terms of shorter measuring and computing time and higher reliability of the algorithms.