A new charging mode of Li-ion batteries with LiFePO4/C composites under low temperature

被引：57
|
作者：
Zhao, Xiao Wei [1 ]
Zhang, Guo Yu [1 ]
Yang, Lin [1 ]
Qiang, Jia Xi [1 ]
Chen, Zi Qiang [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200030, Peoples R China
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2011年 / 104卷 / 02期
关键词：
Charging mode; Li-ion battery; LiFePO4; Low temperature; THERMAL-BEHAVIOR; LITHIUM; PERFORMANCE; ELECTROLYTES; CARBONATE;
D O I：
10.1007/s10973-010-1038-8
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Li-ion batteries with LiFePO4/C composites are difficult to be charged at low temperatures. In order to improve the low temperature performance of LiFePO4/C power batteries, the charge-discharge characteristics were studied at different temperatures, and a new charging mode under low temperature was proposed. In the new charging mode, the batteries were excited by current pulses with the charge rates between 0.75 C and 2 C, while the discharge rates between 3 and 4 C before the conventional charging (CC-CV). Results showed that the surface temperature of Li-ion battery ascended to 3 A degrees C at the end of pulse cycling when the environment temperature was -10 A degrees C. Comparing with the conventional charging, the whole charge time was cut by 36 min (23.4%) and the capacity was 7.1% more at the same discharge rate, respectively.
引用
收藏
页码：561 / 567
页数：7
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