基于SOC的车用锂电池组双向均衡策略研究
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摘要
电池均衡优化是车用锂电池组管理系统的关键功能,为了提高锂电池组工作过程一致性,延长电池组使用寿命,设计了以电感为储能元件,基于升压斩波和降压斩波原理,针对充电和放电过程的双向均衡电路。基于该均衡电路,进一步讨论了SOC均衡判据及均衡模型,并提出均衡算法。基于充电实验和模拟SAE J227a工况放电实验的结果表明,该均衡策略能实现较高精度的均衡目标。
Battery equalization is a key function of lithium battery management system. In order to improve working performance of lithium battery package,prolong the service life of the battery,this paper proposes a new designation which using inductance as energy storage element,adopting boost and buck chopper based on the principle of the bidirectional equalization circuit for charging and discharging process. With the equalization circuit,this paper discusses furtherly the SOC equilibrium criterion and the equilibrium model. The experimental results of charging and simulating SAE J227 a operating conditions show that the equilibrium strategy can achieve a high accuracy of the equalization target.
Battery equalization is a key function of lithium battery management system. In order to improve working performance of lithium battery package,prolong the service life of the battery,this paper proposes a new designation which using inductance as energy storage element,adopting boost and buck chopper based on the principle of the bidirectional equalization circuit for charging and discharging process. With the equalization circuit,this paper discusses furtherly the SOC equilibrium criterion and the equilibrium model. The experimental results of charging and simulating SAE J227 a operating conditions show that the equilibrium strategy can achieve a high accuracy of the equalization target.
引文
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[2]吴洲铁.HEV锂离子电池组管理关键技术研究[D].武汉:华中科技大学,2010.
[3]高敏.基于储能电感的动态双向无损均衡电路的研究[D].天津:天津大学,2010.
[4]熊永华,杨艳,李浩,等.基于SOC的锂动力电池多层双向自均衡方法[J].电子学报,2014,(04):766-773.
[5]牛萌.混合动力车用电池均衡方案研究[D].北京:北京交通大学,2010.
[6]麻友良,陈全世,齐占宁.电动汽车用电池SOC定义与检测方法[J].清华大学学报,2001,41(11).
[7]林小峰,王志浩,宋绍剑.基于双层结构的锂电池主动均衡控制系统[J].电子技术应用,2016,(01):119-122.
[8]刘成尧,王小海,叶建美,等.基于Kalman滤波的车用锌空电池组SOC估算[J].电源技术,2016,(10):2010-2013.
[9]彭志远,杨亚联,秦大同,等.一种估计混合动力用Ni-MH电池单体SOC的方法[J].重庆大学学报,2011,(05):19-25.
[10]吴友宇,梁红.电动汽车动力电池均衡方法研究[J].汽车工程,2004,(04):382-385.