Abstract
A numerical study is performed to analyze the temperature variation and distribution of high-power prismatic Li-ion batteries in excess duration and high-rate current abuse scenarios. With an adiabatic condition at the bottom of the cuboid battery, the highest temperature point is located at the center of the bottom surface, and the lowest is located at the cathode lead at the beginning and then moves to the corner near the cathode during the charging/discharging processes. The rising rate of battery temperature and maximum temperature difference decrease gradually with time, meanwhile the temperature difference of leads increases at first then decreases. With the same current rate, the heat generation rate and temperature difference of discharging are higher than those of the charging processes.
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