EV Driving Across Seasons: SOC strategies for Higher Battery Life Expectancy

Extreme temperatures considerably impact the residual capacity of electric vehicle (EV) battery packs. Most battery degradation models suggest that battery degradation is accelerated at very high and very low temperatures. The effect of seasonal temperatures on the capacity degradation of electric vehicles (EV), when driven for 100,000 km and operated under various drive cycle profiles is studied in this paper. These drive cycles are operated under multiple operational SOC classes, and the degradation is computed using an analytical model that has been extended to the winter season. SOC strategies for the seasonal temperature variations to prolong battery life are determined for the summer, spring, and winter seasons of a typical south Asian country. The results show that although the winter season undergoes the highest degradation of the battery, some profile's summer degradation is worse than other profile's winter degradation. Therefore, these SOC strategies bring essential insights for prolonged battery life.

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