An improved packing equivalent circuit modeling method with the cell-to-cell consistency state evaluation of the internal connected lithium-ion batteries.

摘要: The existing equivalent modeling methods reported in literature focuses mainly on the battery cells and do not take packing consistency state into consideration, which exists internal connected of lithium-ion pack. An improved circuit model is constructed this manuscript for first time, can be used to characterize working characteristics batteries. A new equilibrium concept named as balance proposed well calculation process, realized by considering real-time detected cell voltages. In addition, aims obtain more information characterization adaptive investigated using splice method, statistical noise properties are corrected additional parallel resistance-capacitance introduced. parameter correction treatment carried out comparing estimated experimental closed Furthermore, tracking error found 0.005 V accounts 0.119% nominal voltage. By taking temperature accurate characteristic expression process. Finally, presents a great number advantages compared other so far, like has high accuracy, ability protect security pack power supply application.