Estimation of electric vehicle battery capacity requirements based on synthetic cycles

Quantifying the Impact of Battery Degradation in Electric Vehicle Driving through Key Performance Indicators

“…Longer range batteries showed sufficient capacity to cover the trips even at 50% SoH. These results are in line with another study that analysed a variety of driving use cases where the capacity constraint in most cases did not appear above 60% SoH [12]. Therefore, it can be expected that range reduction from degradation will not pose a significant issue for most drivers, especially for those counting on large-capacity batteries.…”

“…Combining Equation ( 7) with Equation ( 6) and Equations ( 1)-( 4), the necessary battery current to achieve the target speed can be obtained, as shown in Equation (12).…”

“…Combining the equation of the vehicle dynamics, Equation (12) with Equations ( 9)-( 14) can be used to estimate the cell current for a given speed and state.…”

Extending the electric vehicle battery first life: Performance beyond the current end of life threshold

“…In order to analyse representative use cases, the approach presented in a previous work is considered [40] , where synthetic driving cycles are generated for two road types and different driving times. The roads considered are Semi Urban (SU) and Semi Highway (SH), each containing a mix of road types but a dominant urban or highway one respectively.…”

“…For the same application, a loss of 20% of capacity may not pose a problem for a large-capacity battery but might force the EoL for a low-capacity one. Previous studies analysed the capacity requirements for different use cases with diverse driving times, road types, ambient temperature conditions and nominal battery capacities suggesting that, for most cases, that the energy needed to meet common trips is well beyond the battery capacity of common EVs [40] . This goes in line with other research that has examined the capacity needed to meet common trips from real data [41] .…”