Search

An experimental study of the module-to-module thermal runaway (TR) propagation in a multi-modular battery pack is presented here. During the experiment a cell in one of the modules is triggered by heating to study both cell-to-cell and module-to-module propagation. In order to understand the mechanism and gain insight into the thermal hazards of a battery pack system, the thermal characteristics of the cells in different modules are analyzed in detail. Although the TR-propagations are all triggered from the side next to the heater, the results indicate that the thermal characteristics of the modules vary in different phases. The upward direction of burning flame and heat flow highlight the importance of design considerations in a multi-modular battery pack. [ABSTRACT FROM AUTHOR]

Six experiments are presented to validate the testing methods given in TR-propagation regulation (TF5) being developed by The Electrical Vehicle Safety - Global Technical Regulation (EVS-GTR). The novel testingmethods in TF5 draft are present here and used on six different battery packs exposed to thermal runaway. The characteristics of the thermal runaway propagation of the EV battery packs with different designs are investigated. Some of the experiments use the same sample with different heater powers. The result indicated that heater power does not affect the maximum temperature very much, but rather the propagation time. The feasibility of the test approach is demonstrated by the test results. However, the repeatability of the test approach requires improvement. [ABSTRACT FROM AUTHOR]