In this paper, a new control strategy of battery-ultracapacitor hybrid energy storage system (HESS) is proposed for hybrid electric drive vehicles (HEVs). Compared to the stand, alone battery system may not be sufficient to satisfy peak demand periods during transients in HEVs, the ultracapacitor pack can supply or recover the peak power and it can be used in high C-rates. However, the problem of battery-ultracapacitor hybrid energy storage system (HESS) is how to interconnect the battery and ultracapacitor and how to control the power distribution. This paper reviewed some battery-ultracapacitor hybrid energy storage system topology and investigated the advantages and disadvantages, then proposed a new control strategy. The proposed control strategy can improve the system performance and ultracapacitor utilization, while also decreasing the battery pack size to avoid the thermal runaway problems and increase the life of the battery. The experiment results showed the proposed control strategy can improve 3% - 4% ultracapacitor utilization.
References
[1]
Duryea, S., Islam, S. and Lawrance, W. (2001) A Battery Management System for Stand-Alone Photovoltaic Energy Systems. IEEE Industry Applications Magazine, 7, 67-72. https://doi.org/10.1109/2943.922452
[2]
Kang, K., Meng, Y.S., Breger, J., Grey, C.P. and Ceder, G. (2006) Electrodes with High Power and High Capacity for Rechargeable Lithium Batteries. Science, 311, 977-980. https://doi.org/10.1126/science.1122152
[3]
Hsieh, Y.C., Moo, C.S., Tsai, T.J. and Ng, K.S. (2011) High-Frequency Discharging Characteristics of LiFePO4 Battery. IEEE Conference on Industrial Electronics and Applications, Beijing, 21-23 June 2011, 953-957.
[4]
Cao, J. and Emadi, A. (2012) A New Battery/Ultra-Capacitor Hybrid Energy Storage System for Electric, Hybrid and Plug-In Hybrid Electric Vehicles. IEEE Transactions on Power Electronics, 27, 122-132.
https://doi.org/10.1109/TPEL.2011.2151206
[5]
Onar, O. and Khaligh, A. (2008) Dynamic Modeling and Control of a Cascaded Active Battery/Ultra-Capacitor Based Vehicular Power System. IEEE Vehicle Power and Propulsion Conference, Harbin China, 3-5 September 2008.
[6]
Zhang, Y., Jiang, Z. and Yu, X. (2008) Control Strategies for Battery/Supercapacitor Hybrid Energy Storage Systems. IEEE Energy 2030 Conference, Atlanta, GA, 17-18 November 2008. https://doi.org/10.1109/ENERGY.2008.4781031
[7]
Bryant, B. and Kazimierczuk, M.K. (2004) Small-Signal Duty Cycle to Inductor Current Transfer Function for Boost PWM DC-DC Converter in Continuous Conduction Mode. 2004 IEEE International Symposium on Circuits and Systems, Vancouver, BC, 23-26 May 2004, 856-859.
