梯次利用储能电池管理技术与试验应用

Research and Experiment Application of Echelon-Use Energy Storage Battery Management Technology

为了保证梯次利用电池储能系统的安全可靠运行,提出了100 k W·h梯次利用储能电池系统的安全电池管理系统。首先,针对梯次利用的100 k W·h储能用动力电池的特性进行初步分析,包括储能系统中梯次利用电池的容量分布分析、不同容量电池在某特定工况下电池模组的SOC-OCV特性分析、系统充放电容量测试、电池容量不一致性分析等,明确了针对梯次利用电池管理的主要关键参数。其次,为了保证梯次利用电池储能系统的安全可靠运行,对梯次利用电池的特性进行了系统安全可靠性分析,采用了系统级的故障诊断方法和多级故障报警策略。最后,用开发的电池管理系统样机进行系统容量测试验证。试验结果表明,此电池管理系统满足梯次利用电池储能系统的应用需求。

To make sure the safe and reliable operation of echelon-use battery energy storage system,this paper proposes a safe battery management system for 100 k W · h echelon-use energy storage battery system. Firstly,we analyze the characteristics of 100 k W · h echelon-use power battery for energy storage,including the battery capacity distribution analysis,SOC-OCV characteristics analysis of battery module with different capacities under certain conditions,the charge and discharge capacity test of system,the inconsistency analysis of battery capacity,etc. And the key parameters used in the echelon-use battery manage system have been decided. Then,we analyze the system safety and reliability of echelon-use battery characteristics in order to ensure the safe and reliable operation of echelon-use battery energy storage system,and adopt the system-level fault diagnosis method and multilevel fault alarm strategy. Finally,we use the developed battery management system prototype to test and verify the system capacity. The experimental results showthat this battery management system can meet the application requirements of the echelon-use battery energy storage system.