摘要
介绍了额定容量为10Ah的锂离子动力电池的制备方法,评价了电池的充放电性能、过充电性能及电池一致性等。实验表明,电池的能量密度超过165Wh/kg;0.5C倍率充放电循环500次后电池容量仍为初始容量的90%;-10℃及-20℃时电池放电容量分别为初始容量的75%及70%;电池的过充电性能需进一步改进,过充电压只能达到5.0V;0.1C、0.2C、0.5C和0.8C倍率放电,工作电压平台均超过3.6V,电压差小于0.08V;电池表现出良好的一致性,达到锂离子动力电池的性能指标。
The preparation methods of Li -ion power batteries with nominal capacity 10Ah were studied. And their charge/discharge, over charging and consistency performance were evaluated. The results showed that the energy density of 10Ah battery was higher than 165Wh/kg. When charging and discharging at 0.5C, the capacity retention of battery was 90% of the initial after 500 cycles. The capacity retention was 75% and 70% at - 10℃ and -20℃, respectively. The overcharging voltage of 10Ah battery only reached 5.0V, thus its performance needed to be further improved. When discharging at 0.1C, 0.2C, 0.5C and 0.8C, all the voltage plateaus of 10 Ah batteries exceeded 3.6V and the voltage difference was less than 0.08V. These batteries exhibited good consistency and achieved the performance index of power lithium ion secondary battery.
出处
《电池工业》
CAS
2007年第6期408-411,共4页
Chinese Battery Industry
关键词
锂离子动力电池
能量密度
充放电特性
Li - ion power battery
energy density
charge - discharge performance
