The ignition processes that take place during activation of a 16-cell, center-hole-fired thermal battery were examined by monitoring the voltage of each cell during activation. The average rise time of each cell to a voltage of 1.125 V wasdetermined for the LiSi/LiCl-LiBr-LiF/FeS{sub}2 electrochemical system. The effects of heat-pellet composition, center-hole diameter, and the load on the activation parameters were examined for three different igniters. A large variability in individualcell performance was evident along with cell reversal, depending on the location of the cell in the stack. It was not possible to draw detailed statistical information of the relative ignition sequence due to the intrinsic large scatter in the data.
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