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Design and Applications of Hybrid Electrical Energy Storage Systems

Event Date: May 14, 2015
Speaker: Younghyun Kim
Speaker Affiliation: Purdue University, School of Electrical and Computer Engineering
Time: 10:30am
Location: MSEE 239
Contact Name: Cheng-Kok Koh
Contact Phone: 765-49-63683
Contact Email:


From small Internet-of-Things (IoT) devices to grid-scale systems, energy storage is an essential part that plays the vital role of bridging energy generation and energy consumption. In order to improve the quality of entire energy supply in terms of efficiency, reliability, and so on, careful design and management of energy storages is crucial.

In this talk, I will present the design and management techniques for hybrid electrical energy storage (HEES) systems. A HEES system takes advantage of heterogeneous energy storage technologies while hiding their drawbacks by adopting high-level control strategies. In order to maximize the benefits of this heterogeneity, especially as the number of constituent components increases, HEES systems should be designed and managed in a systematic manner. First, I will talk about the analogies between the HEES system design problems and computer system design problems, which provide useful insight into this effort for systematic design and management. Next, I will introduce a networked interconnect architecture for HEES systems and efficient design and management algorithms for improving the energy efficiency. I will also present an application of HEES systems for power grid frequency regulation, and introduce residential-scale HEES system prototypes developed in my research. Finally, I will present my future research directions in building energy-efficient and secure embedded systems for various applications.


Younghyun Kim is a Postdoctoral Research Assistant at the School of Electrical and Computer Engineering of Purdue University. He received his Ph.D. in Electrical Engineering and Computer Science and B.S. (with Highest Honor) in Computer Science and Engineering from Seoul National University in 2013 and 2007, respectively. From 2009 to 2011, he was a visiting scholar at the University of Southern California. He received EDAA Outstanding Dissertation Award in 2013, ISLPED Low Power Design Awards in 2007 and 2012, and IEEE SSCS Seoul Chapter Best Paper Award at ISOCC 2009. His current research interest includes power management of embedded systems, energy harvesting and storage systems, and secure implantable and wearable medical devices.