市域动车组锂电池自牵引性能研究

Research on self-traction performance of lithium battery for urban EMU

以某型市域动车组自牵引应用需求为契机,通过对比不同锂电池的技术参数和整体性能,选取了功率密度大、放电倍率大、安全性高的钛酸锂蓄电池作为动车组蓄电池,并设计了蓄电池自牵引电路。针对市域动车组正线运营过程中供电故障时的应急救援和段场内自行转线两种工况,提出正线蓄电池自牵引模式和段场蓄电池自牵引模式,并对不同模式下的牵引特性进行研究;由于正线蓄电池自牵引工况较为严苛,对该工况下蓄电池性能、牵引电机温度、绝缘栅双极晶体管(IGBT)结温进行仿真,结果表明,钛酸锂电池可以满足市域动车组长距离的自牵引应用需求。

Taking the self-traction application requirements of a certain type of urban EMU as the opportunity,by comparing the technical parameters and overall performance of different lithium batteries,the lithium titanate battery with high power density,large discharge rate and high safety is selected as the EMU battery,and the battery self-traction circuit is designed.Aiming at the two working conditions of emergency rescue for power supply failure when the urban EMU is operating on the main line and self-transfer in the depot,the battery self-traction modes of the main line and the depot are proposed,and the traction characteristics under different modes are studied.Due to the harsh battery self-traction condition of the main line,the battery performance,the temperature of the traction motor,the junction temperature of the insulated gate bipolar transistor(IGBT)and the temperature rise of the battery in this mode are simulated.The results show that the lithium titanate battery can meet the long-distance selftraction application requirements of the urban EMU.