An adaptive driving assistance system for electric vehicle

In this paper, an adaptive driving assistance system for electric vehicle (EV) charging guiding was developed. In order to make sure EV driving without running out of battery, chargeable driving region was designed to indicate a safe driving region. EV was allowed to reach any positions within the proposed chargeable driving region and was guaranteed to reach at least one charging station with sufficient battery power. In general, a traditional charging guiding system usually estimated the maximum driving range to indicate a reachable driving region. However, only considering reachable driving region might result running out of battery afterward. It was not guaranteed that the reachable region was also chargeable. Therefore, the proposed adaptive driving assistance system estimated a chargeable driving region instead. The chargeable driving region not only estimated the required battery power from the current EV position to the boundaries of the region but also the required battery power from the boundaries of the region back to an available charging station. In other words, as long as EV was driven within the indicated chargeable driving region, EV was guaranteed to reach at least one charging station to charge without running out of battery. In the implemented system, current EV position, charging station positions, vehicle weight, road gradient and vehicle speed were applied to calculate the chargeable driving region.