Implementation and Study of Super-capacitor Cell Power Management System
This paper proposes a novel super-capacitor cell power management system to monitor current and balance state of charge for each cell while charging and discharging a multi-cell super-capacitor stack.Generally,the super-capacitor cells are in series connection to form a multi-cell stack for practical applications due to the much lower operating voltage of super-capacitor.The cells should suffer from the imbalance charging issue caused by intrinsic property differentials among separate cells even labeled the same specification.The imbalance charging phenomenon can cause some super-capacitor cells in stack overcharging to be destroyed and decrease their lifetime.The imbalance charging also results in other super-capacitor cells in the same stack undercharging and makes the cells as well as the cell stack utilization and performance very low.One popular conventional balance charging control method uses some passive networks comprised of resistors so that there are some fatal disadvantages,including the poor efficiency resulting from the resistor dissipation and the difficulty for resistor selection and setting as well as the accuracy degrading.Therefore,this paper provides an active balancing circuit which can maintain equal voltages across each super-capacitor cell and clamp the peak voltage across each cell to a selectable maximum value by monitoring cell state of charge in the stack.The proposed adaptive and active charging balance control method utilizes off-the-shelf control IC which only needs to be simply and easily modified in which charging strategy is the pulse charging method which is implemented easily and simply in view of super-capacitor lifetime and fast charging.The experimental results verify the theoretic analysis and feasibility of the proposed control method.
Shao-Wei Chieh Wen-Hsien Ho Chung-Bo Tsai Po-Chou Chen Sheng-Yuan Ou
Department of Electrical Engineering,National Taipei University of Technology,Taiwan Taiwan Textile Research Institute,Taiwan
国际会议
Progress in Electromagnetics Research Symposium 2013(2013年电磁学研究新进展学术研讨会)
台北
英文
705-708
2013-03-01（万方平台首次上网日期，不代表论文的发表时间）