The advent of Electric Vehicles (EVs) is considered to be one of the most promising technological advancements to decarbonise the road transport. But, the realisation and sustainability of this technology demands a fast charging technique to substantially reduce the long charging hours required by the conventional charging techniques. This research work makes an effort to determine the optimum Charge rate (C-rate), for a Li-ion cell, as a function of the State Of Charge (SOC) to obtain, in a 30 minutes charging time and, a Cut Off Voltage (COV) of 4.1 V. First the effect of charging performance of three different C-rates as a function of SOC with a typical COV of 4.2 V is analyzed using two-level modelling method. The study is furthered by applying, a period of 30 minutes charge time and, a COV of 4.1 V as the two constraints to obtain the boundary condition for the SOC. Then, an integrated modelling approach deploying COMSOL LiveLink for Matlab toolbox is proposed to determine the optimum C-rate as a function of the SOC. The results show a 14 % rise in the SOC, at the determined optimum C-rate, than that possible at a typical 1 C-rate.
|Publication status||Published - 2012|