摘要
本项目选用了两种不同的电池管理模式对磷酸铁锂电池组进行管理,并将组装好的两套电池组应用于110 k V变电站直流系统的日常运行。运行结果表明,磷酸铁锂电池可以在变电站替代铅酸蓄电池使用,并且可以浮充运行;运行过程中,单体电池的电压会由于电池充电态的变化下降或上升;单体电池的内阻呈现先下降再上升的变化;电池组的放电容量随着运行时间的延长出现每年3%左右的衰减(浮充电压为3.6 V);合适的电池管理模式能将电池组内单体电池的电压差保持在较小的范围,有利于电池组长寿命的运行。
Two types of battery management modes were applied for LiFePO_4 battery packs used in 110 kV substation DC power system. The operation result indicated that LiFePO_4 battery showed capability of replacement of lead-acid battery and good float-charging characteristics. The voltage and the internal resistance changed with the SOC of the single cells and the battery packs presented a 3% capacity degradation per year. Suitable battery management mode kept a small voltage difference among the single cells and prolonged the cycling life of the battery packs.
出处
《储能科学与技术》
CAS
2016年第2期241-245,共5页
Energy Storage Science and Technology
关键词
磷酸铁锂电池组
直流系统
电池管理模式
lithium ion phosphate battery pack
direct current power supply system
battery management mode
