This paper presents an improved and user-friendly battery dynamic model for electric vehicles (EVs). The model is validated experimentally with four types of batteries, demonstrating its accuracy in representing the dynamic behavior of the battery. The key feature of the model is its simplicity in extracting parameters from battery datasheets, requiring only three points on the manufacturer's discharge curve. The model is integrated into the SimPowerSystems simulation software and used to simulate an electric vehicle based on a hybrid fuel cell-battery power source. The results show that the model accurately represents the dynamic behavior of the battery, with errors within ±5% for State of Charge (SOC) between 100% and 20% during charge and discharge. The model also accurately represents the hysteresis effect for Nickel-Metal-Hydride (NiMH) batteries. The paper concludes that the new SimPowerSystems battery model effectively supports the design and adjustment of the energy management system in fuel cell vehicles, with results consistent with real-world data from the Honda FCX Clarity.This paper presents an improved and user-friendly battery dynamic model for electric vehicles (EVs). The model is validated experimentally with four types of batteries, demonstrating its accuracy in representing the dynamic behavior of the battery. The key feature of the model is its simplicity in extracting parameters from battery datasheets, requiring only three points on the manufacturer's discharge curve. The model is integrated into the SimPowerSystems simulation software and used to simulate an electric vehicle based on a hybrid fuel cell-battery power source. The results show that the model accurately represents the dynamic behavior of the battery, with errors within ±5% for State of Charge (SOC) between 100% and 20% during charge and discharge. The model also accurately represents the hysteresis effect for Nickel-Metal-Hydride (NiMH) batteries. The paper concludes that the new SimPowerSystems battery model effectively supports the design and adjustment of the energy management system in fuel cell vehicles, with results consistent with real-world data from the Honda FCX Clarity.