Supercapacitor (SC) is a novel and potential device in energy storage system (ESS), which owns the characteristics of high power density, fast response time, and long lifetime expectancy. As closely related to the reliability of SCs, lifetime estimation plays an important role in performance evaluation and device sizing. This paper presents a review on SC lifetime models, and depicts the reliability-oriented design procedure of SCs system. At first, physics-of-failure (PoF) mechanism is discussed as the fundamental of lifetime modeling. Afterwards different models from literature are analyzed systematically according to different concern of stressors. At last, a reliability-oriented design procedure is given for SCs system, from the perspective of users. This paper serves to provide a clear picture of the stateof-the-art research in lifetime modeling, and give some application-oriented suggestions and future research directions for SCs.
Keywords supercapacitor, energy storage system, lifetime model, reliability-oriented design