空间用宽温度范围电池单体电压采集补偿算法  

Voltage acquisition and compensation method for battery cell in wide temperature range for spacecraft

作　　者：王锴[1] 胡斌[1] 刘涛[1] 冯利军[1] 孙宏杰 WANG Kai;HU Bin;LIU Tao;FENG Lijun;SUN Hongjie(Tianjin Institute of Power Sources,Tianjin 300384,China)

机构地区：[1]中国电子科技集团公司第十八研究所,天津300384

出　　处：《电源技术》2023年第3期312-315,共4页Chinese Journal of Power Sources

摘　　要：针对空间用锂离子蓄电池组高精度的采集需求,提出了一种温度补偿的算法。在硬件滤波架构的基础上,将采样误差解耦为非温度相关的系统偏差和器件温度系数引起的误差两方面,通过软件算法进行线性修正和温度补偿,其中各个采样通道的线性修正算法采用相互独立的修正参数以达到更好的修正效果,温度补偿算法则在不同通道中采用相同的温度修正参数。此方法简单可靠,具有较强的可操作性,所有补偿通过软件实现,适用于任意串联节数的锂离子蓄电池组。经仿真和实验验证,此电路在-35~70℃对电池单体电压的采集误差小于2 mV,能够满足空间电池管理系统的需求。同时,本温度补偿方法也适用于其他宽温度范围的参量采集领域。A high accuracy acquisition method with temperature compensation algorithm was proposed for space-use lithium-ion battery packs.On the basis of the hardware filtering architecture,the sampling error was decoupled into two aspects:the non-temperature-related system error and the device temperature coefficient caused error.The first one was corrected by linear correction and the second one was compensated by temperature compensation.In order to achieve better correction effect,the linear correction algorithm of each sampling channel adopted mutually independent correction parameters of each channel.And considering both the accuracy and convenience of compensation,the temperature compensation algorithm adopted the same temperature correction parameters in different channels.This method was simple,reliable,and had strong operability,since all compensation was realized by software and it was suitable for lithium-ion battery packs with any number cells series-connected.Through simulation and experimental verification,this method can reduce the sampling error less than 2 mV for each cell in the battery pack of 20 cells within a wide temperature range of-35~70℃,which can meet the requirements of the spacecraft battery management system.Furthermore,this temperature compensation method is also suitable for other parameter acquisition fields with a wide temperature range.

关 键 词：航天器 电压采集 环境循环测试 

分 类 号：TM912[电气工程—电力电子与电力传动]