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Conference papers

Key parameters design for online battery electrochemical impedance tracker

Abstract : New applications in transport and energy storage require the use of Lithium-ion batteries. Advanced battery management systems including electrochemical impedance measurement are studied for the determination of the state of the battery, the prediction of the autonomy, the failure and security management. Taking into account constraints of cost and simplicity, we propose to use the existing electronics of current control and we evaluate the effect of the electronics design on the performance of a frequency evolutionary estimation of the electrochemical impedance. This recursive method relies on a wideband active approach and provides both an accurate estimate of the impedance in the frequency area and a tracking of its temporal variations. Benefits are the limitation of the data memory required and the amount of operations that can be completely carried out by a target such as a microcontroller. We propose a methodology to design the key parameters of electronics in function of the frequency band of interest and the desired accuracy. We highlighted that electronics of conventional BMS can host this tracking algorithm, with analog to digital converters of 10 bits or more, having an analog stage to adapt their dynamics, and that microcontrollers can be enough powerful to perform calculations, both in terms of number of operations and speed of execution. This design strategy has been applied to define a prototyping environment for a BMS based on an ARM microcontroller which is expected to provide the tracking impedance of a battery every 250 ms with less than 0,5 % of error.
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https://hal.archives-ouvertes.fr/hal-01244024
Contributor : Pierre Granjon Connect in order to contact the contributor
Submitted on : Tuesday, December 15, 2015 - 2:08:39 PM
Last modification on : Monday, December 13, 2021 - 9:42:26 AM
Long-term archiving on: : Wednesday, March 16, 2016 - 1:30:54 PM

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  • HAL Id : hal-01244024, version 1

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Hélène Piret, B Portier, S Bacquet, M Palmieri, Pierre Granjon, et al.. Key parameters design for online battery electrochemical impedance tracker. EEVC 2015 - European Battery, Hybrid and Fuel Cell Electric Vehicle Congress, Dec 2015, Bruxelles, Belgium. ⟨hal-01244024⟩

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