TY - GEN
T1 - Electrochemical impedance spectroscopy for online battery monitoring - Power electronics control
AU - Koch, Reinhold
AU - Kuhn, Robert
AU - Zilberman, Ilya
AU - Jossen, Andreas
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/9/25
Y1 - 2014/9/25
N2 - Online diagnostics for monitoring of battery cells in a battery pack is necessary in order to determine the state of the battery pack, like its age and safe operation. It could also provide the possibility to adjust the operation strategy of the battery management system and the load to increase the battery lifetime and safety. Impedance spectroscopy is a well-known measurement technique for electrochemical systems, such as a battery half-cell. Once the method is implemented in the battery management system and performed online during operation it could provide a monitoring system for the whole pack. Current solutions are either inaccurate or too big, expensive and energy inefficient. The presented approach proposes a dual use of the battery charger which incorporates a switched mode amplifier to generate the stimuli current necessary to perform an electro impedance spectroscopy. A suitable control is designed to overcome the non-linearities and instabilities introduced by the output filter and the current crossover effects of the electronic switches. This inexpensive, energy efficient technology could allow impedance monitoring of every cell in the battery pack and make a better prediction of the state of the battery possible.
AB - Online diagnostics for monitoring of battery cells in a battery pack is necessary in order to determine the state of the battery pack, like its age and safe operation. It could also provide the possibility to adjust the operation strategy of the battery management system and the load to increase the battery lifetime and safety. Impedance spectroscopy is a well-known measurement technique for electrochemical systems, such as a battery half-cell. Once the method is implemented in the battery management system and performed online during operation it could provide a monitoring system for the whole pack. Current solutions are either inaccurate or too big, expensive and energy inefficient. The presented approach proposes a dual use of the battery charger which incorporates a switched mode amplifier to generate the stimuli current necessary to perform an electro impedance spectroscopy. A suitable control is designed to overcome the non-linearities and instabilities introduced by the output filter and the current crossover effects of the electronic switches. This inexpensive, energy efficient technology could allow impedance monitoring of every cell in the battery pack and make a better prediction of the state of the battery possible.
KW - Amplifiers
KW - Battery Management Systems (BMS)
KW - Converter Control
KW - Impedance measurement
KW - Passive filter
UR - http://www.scopus.com/inward/record.url?scp=84923924466&partnerID=8YFLogxK
U2 - 10.1109/EPE.2014.6910907
DO - 10.1109/EPE.2014.6910907
M3 - Conference contribution
AN - SCOPUS:84923924466
T3 - 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014
BT - 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 16th European Conference on Power Electronics and Applications, EPE-ECCE Europe 2014
Y2 - 26 August 2014 through 28 August 2014
ER -