Abstract
A LiFePO4-type lithium secondary battery cell of 8 Ah capacity with a high energy density and power density was developed for hybrid electric vehicle (HEV) applications by optimizing the key raw materials and process design. The 8 Ah class LiFePO4 cell with an energy density of 77.2 Wh·kg−1 exhibits a power density of 2818 W·kg−1 at 50 % SOC (state of charge). The battery shows good cyclic capability with the capacity retention of 81.1 % after 1,870 cycles at 5C charge and 10C discharge rates. It is demonstrated that the cells have an excellent balance of high-power, high-energy, low temperature, and long-life performance for meeting the requirements of HEV.
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Acknowledgments
This study was financially supported by the State Basic Research Development Program of China (No. 2009CB220100), the Ministry of Science and Technology (MOST) of China, US-China Collaboration on Cutting-Edge Technology Development of Electric Vehicles(No.2010DFA72760), the National Natural Science Foundation of China (Nos. 50901009 and 51271029), and the Fundamental Research Funds for the Central Universities (No. 12QNJJ013).
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Deng, LZ., Wu, F., Gao, XG. et al. Development of a LiFePO4-based high power lithium secondary battery for HEVs applications. Rare Met. 39, 1457–1463 (2020). https://doi.org/10.1007/s12598-014-0316-1
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DOI: https://doi.org/10.1007/s12598-014-0316-1