Double-Tiered Switched-Capacitor Battery Charge Equalization Technique
The automobile industry is progressing toward hybrid, plug-in hybrid, and fully electric vehicles in their future car models. The energy storage unit is one of the most important blocks in the power train of future electric-drive vehicles. Batteries and/or ultracapacitors are the most prominent storage systems utilized so far. Hence, their reliability during the lifetime of the vehicle is of great importance. Charge equalization of series-connected batteries or ultracapacitors is essential due to the capacity imbalances stemming from manufacturing, ensuing driving environment, and operational usage. Double-tiered capacitive charge shuttling technique is introduced and applied to a battery system in order to balance the battery-cell voltages. Parameters in the system are varied, and their effects on the performance of the system are determined. Results are compared to a single-tiered approach. MATLAB simulation shows a substantial improvement in charge transport using the new topology. Experimental results verifying simulation are presented.
A. Baughman and M. Ferdowsi, "Double-Tiered Switched-Capacitor Battery Charge Equalization Technique," IEEE Transactions on Industrial Electronics, vol. 55, no. 6, pp. 2277-2285, Institute of Electrical and Electronics Engineers (IEEE), Jun 2008.
The definitive version is available at http://dx.doi.org/10.1109/TIE.2008.918401
Electrical and Computer Engineering
National Science Foundation (U.S.)
Keywords and Phrases
Automobile Industries; Batteries; Battery Systems; Car Models; Cell Voltages; Charge Equalization; Charge Transports; Driving Environments; Electric-Drive Vehicles; Energy Storage Units; Matlab Simulations; Operational Usages; Plug-In; Power Trains; Storage Systems; Switched Capacitors; Ultracapacitors; Automobile Drivers; Electric Automobiles; Engineering Exhibitions; Land Vehicle Propulsion; MATLAB; Model Automobiles; Capacitors
International Standard Serial Number (ISSN)
Article - Journal
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