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Analysis and evaluation of charge-balancing circuits on performance, reliability, and lifetime of supercapacitor systems

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4 Author(s)
D. Linzen ; Inst. for Power Electron. & Electr. Drives, RWTH-Aachen Univ., Aachen, Germany ; S. Buller ; E. Karden ; R. W. De Doncker

Supercapacitors, also known as ultracapacitors or electric double-layer capacitors (ELDCs), are electrical energy storage devices, which offer high power density, extremely high cycling capability, and mechanical robustness. Due to their electrical performance, supercapacitors have a high potential to be used in industrial applications. To improve the performance, reliability, and lifetime of these capacitors, charge-balancing circuits are employed. In this paper, different equalization concepts are analyzed and evaluated. In addition, a simulation approach for the design of supercapacitor systems is proposed. As an example, results from an automotive application are presented.

Published in:

IEEE Transactions on Industry Applications  (Volume:41 ,  Issue: 5 )