考虑倍率的平流层飞艇储能电池建模与分析

Accurately grasping the actual power of energy storage battery is one of the key factors for the stratospheric airship to realize long-time flight. First, a simulation model of a stratospheric airship energy system was established to analyze the energy input and consumption dynamically. Then, charging and discharging tests of energy storage batteries with different electric current ratios were carried out. The polynomial fitting method was adopted to establish an analysis model of state of charge (SOC), remaining discharging time (RDT) and remaining charging time (RCT) in the process of charging and discharging of energy storage batteries. Finally, the flight simulation was carried out by combining the energy input and consumption models of the energy system and the battery model to obtain the variation data of each part. And the quantitative comparison and analysis with the existing experimental data were conducted. The results show that the calculated errors of the established energy storage battery model in SOC, RDT and RCT are less than 3%, 1.5% and 1.5% respectively, which can accurately reflect the changes of SOC, RDT and RCT during the battery working process, and can provide quantitative support for the formulation of optimal flight strategies for the stratospheric airship platform.