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《Transactions of China Electrotechnical Society》 2015-01
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Equalization Control Strategy and SOC Estimation for LiFePO_4 Battery Pack

Feng Fei;Song Kai;Lu Rengui;Wei Guo;Zhu Chunbo;Harbin Institute of Technology;  
Due to the different temperature gradients and coulomb efficiencies, the remaining capacity between cells will be inconsistencies, which results in the decrease of the capacity of battery pack. In order to improve the performance of battery pack, an equalization control strategy, which is based on t-SOC decision and k-SOC control, is proposed. Moreover, SOC algorithm of battery pack at balanced/unbalanced state is proposed. Finally, the accuracy of SOC estimation has been verified at balanced/unbalanced state. The results indicate that our method can provide effective equalization.
【Fund】: 国家高技术研究发展计划(863计划)(2012AA111003);; 国家电网公司总部科技(黑电科信[2013]384号);; 国家自然科学基金(51277037)资助项目
【CateGory Index】: TM912
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