【摘要】 针对动力锂电池组充放电过程中,各单体电池之间存在的不一致性,设计了超级电容与双向DC-DC变流器相结合的无损均衡管理系统。采用无迹卡尔曼滤波法估算锂电池的荷电状态,与通常采用的扩展卡尔曼滤波器进行了对比研究,经实验验证,本系统能够快速、高效地实现锂电池组的均衡控制,实现精确地锂电池SOC(State of Charge)估计,提高了动力锂电池组的可靠性和安全性。更多还原

【Abstract】 According to inequality of each single battery in charge and discharge process,a non-dissipative equalization system is introduced for the power lithium battery pack,which is comprised of super capacity and bidirectional DC-DC converter. Adopting unscented Kalman filter to estimate batteries state of charge,and a comparative study is introduced by using extended Kalman filter. Experiments show that this system can equalize the battery energy quickly and efficiently,achieve the accurate SOC( State of Charge) estimation of battery,and improve the reliability and security of the lithium battery pack.更多还原