Assessing the accuracy of loss estimation methods for supercapacitor energy storage devices operating under constant power cycling

Kulsangcharoen, Ponggorn; Klumpner, Christian; Rashed, Mohamed; Asher, Greg; Chen, George Z.; Norman, Stuart A.

Abstract

This paper assesses different energy loss estimation methods using the supercapacitor model parameters extracted from the electrochemical impedance spectroscopy (EIS). Two energy loss estimation methods are applied to two similar supercapacitors from different manufacturers operating under constant power charge-discharge cycling. The simpler loss method uses only the impedance data that corresponds to the cycle frequency and the instantaneous current data whilst the more complex method uses the detailed impedance vs frequency dependency and the corresponding current harmonics available from the FFT. The experimental loss data (the benchmark) uses integration of instantaneous power processed by the supercapacitor. By comparing the difference between the estimated and the experimental losses, the performance of each method is assessed and the factors that influence the accuracy of the two loss estimation methods as well as their limitations are highlighted.

Citation

Kulsangcharoen, P., Klumpner, C., Rashed, M., Asher, G., Chen, G. Z., & Norman, S. A. (2014). Assessing the accuracy of loss estimation methods for supercapacitor energy storage devices operating under constant power cycling. In 2014 16th European Conference on Power Electronics and Applicationshttps://doi.org/10.1109/epe.2014.6911043

• Conference Name: 2014 16th European Conference on Power Electronics and Applications (EPE'14-ECCE Europe)
• Start Date: Aug 26, 2014
• End Date: Aug 28, 2014
• Acceptance Date: Mar 30, 2014
• Online Publication Date: Sep 29, 2014
• Publication Date: 2014-08
• Deposit Date: Jul 12, 2016
• Publicly Available Date: Jul 12, 2016
• Peer Reviewed: Peer Reviewed
• Book Title: 2014 16th European Conference on Power Electronics and Applications
• ISBN: 9781479930159
• DOI: https://doi.org/10.1109/epe.2014.6911043
• Keywords: Efficiency, Energy storage, Estimation technique, Power cycling, Supercapacitors
• Public URL: http://eprints.nottingham.ac.uk/id/eprint/34811
• Publisher URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6911043
• Copyright Statement: Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf