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Due to increased environmental pollution and global warming concerns, the use of energy storage units that can be supported by renewable energy resources in transportation becomes more of an issue and plays a vital role in terms of clean energy solutions. However, utilization of multiple energy storage units together in an electric vehicle makes the powertrain system more complex and difficult to...
Three different energy storage system (ESS) topologies; battery-only, battery/ultra-capacitor (UC) and battery/UC/fuel-cell (FC) are studied for the electric vehicles (EVs) with two complementary propulsion machines. Convex optimization are utilized to optimize the power-split in hybrid energy storage system (HESS) so that the battery lifetime can be extended and the all-electric-range (AER) can be...
In this paper, a power split control strategy is proposed for an electric vehicle (EV) powertrain with two propulsion machines and a battery/ultra-capacitor (UC) hybrid energy storage system (HESS). Using this supervisory control strategy, the load power is effectively split between the two propulsion machines to obtain the highest powertrain efficiency in both propulsion and regenerative braking...
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