动力驱动系统锂电池放电的C-I-U-T关系

Lithium battery discharging C-I-U-T relationship of power drive systems

对动力驱动系统单体18650锂电池采用大电流和小电流的恒流放电方式,放电截止电压为3.0V。通过对比小电流和大电流的放电曲线,可知采用小电流放电达到截止电压需要的时间较长,而放电深度大;采用大电流放电达到截止电压需要的时间很短,而放电深度比较小。记录下单体18650锂电池的端电压、容量和时间,通过相关的数据分析,得出以0.5C倍率的电流对单体18650电池进行放电,放电效率最佳。

Power drive 18650 lithium monomer systems with large current and low current mode constant current discharge mode, discharge cut-off voltage is 3.0V. By comparing the discharge curves of low current and high current, a low current discharge requires a long time to reach the cutoff voltage, while a large depth of discharge; a large current discharge requires to reach the cut-off voltage is very short, and the depth of discharge is relatively shallow. Record 18650 lithium monomer terminal voltages, capacity and time, through the relevant data analysis, At a current rate of 0.5C discharge 18650 lithium monomer the battery, the discharge efficiency is the best.