Tuesday, 30 May 2017: 08:00
Prince of Wales (Hilton New Orleans Riverside)
A numerical simulation method, basing on finite element analysis, for the activation process of thermal battery is discussed in this manuscript, and which can be applied to predict the heat distribution, open-circuit voltage and on-load voltage of thermal battery in the activation process. The sequenced combustion and heat releasing of igniter, pyrotechnic cylinder and pellet, combined with the melting process of electrolyte, are considered in the simulation model, which can accurately exhibit the heat distribution characteristics of thermal battery in the activation process to some extent. Basing on the simulation results of heat distribution, the model can predict the open-circuit voltage of thermal battery in activation process by loading the open-circuit voltage curve of single cell thermal battery along with temperature. The on-load voltage was calculated basing on the butler-volmer equation in the model. In addition, the time of thermal battery with full-load capacity can be predicted by analyzing the melting characteristics of electrolytic. Compared with the experimental results, it can be found that the simulation method has a relatively high precision. Fig.1 is the temperature simulation results of thermal battery in the activation process.
