一种SAR卫星用锂电池智能充电方法

Intelligent Charging Method of Lithium Battery for Used in SAR Satellite

针对合成孔径雷达(SAR)卫星锂电池长寿命和大脉冲供电的需求,文章在SAR卫星用顺序开关并联串联调节器(S~4R)型充电系统上设计了一种充电算法,利用载荷的当圈光照期用电电量,实时调整锂电池的充电倍率,在有限的时间内完成锂电池的智能充电。突破传统先恒流后恒压的充电方法,降低了锂电池充电过程中的极化效应和产生锂枝晶的概率,延长锂电池在轨使用寿命。经SAR卫星下传遥测数据分析,结果表明:充电算法实现了锂电池的智能充电,可以为后续有长寿命要求和大脉冲负载的卫星用锂电池充放电制度提供参考。

In response to the long life and large pulse power supply requirements of the SAR satellite lithium battery,a charging algorithm on sequential switching shunt regulator(S 4 R)charging system for the SAR satellite is designed in this paper.By utilizing the electricity consumption of the payload unit during the current cycle of illumination,the charging rate of the lithium battery is adjusted in real time to complete the lithium battery intelligent charging within a limited time.It breaks through the traditional constant current-constant voltage charging method and reduces the polarization effect and the probability of lithium dendrite formation during the charging process,extending the in orbit life of lithium battery.The analysis of the telemetry data downloaded from the SAR satellite shows that the charging algorithm has realized the intelligent charging of lithium battery and can provide a reference for charging and discharging system of lithium battery for subsequent satellites with long life requirements and large pulse loads in the future.