Battery state of charge assumes a critical part in advancing electric vehicle energy management, improving battery capacity and energy utilization, keeping batteries from overcharging and over-discharging, for the purpose to guarantee the security and long-term use of batteries lifespan and the expected vehicle autonomy with the indicated battery state of charge. This study presents a battery state of charge estimation using coulomb counting technique with a constant and variable discharging current for Lead-acid battery. In this way, the current, voltage, and temperature are measured during the battery cycle of charge and discharge and contrasted with the estimated value depending on the battery generic model. Additionally, exploratory outcomes are done to approve this investigation.
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