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Thermal and electrical effects of basbars on Li‐Ion batteries

Keeping temperature under control is critical for batteries to work effectively. When the safe operating range is exceeded, both the lifetime of batteries decreases and undesirable situations may occur such as fire. In this study, the effects of basbars on battery modules are examined. It is shown that the most intense current transitions pass through the shortest path connecting the batteries. When the distance between the batteries is increased, cooling is effective and the temperature of the batteries is expected to decrease. However, this is not the case in our study. It is observed that the temperature of the battery modules increases due to the increased length of the basbar. For this reason, it is emphasized that basbars are a parameter that cannot be ignored with respect to the temperature of battery modules. In this study, six different materials (ie, silver, copper, gold, nickel, steel and titanium) are used as basbars when trying to achieve the best results. For each basbar material, the maximum temperature values and discharge curves reached by the battery module are found. The results suggest that silver is the best basbar material. For the silver material, the temperature distributions of the battery modules, the maximum temperature value received by the module and the discharge curves are found for different C ratios.