Lifetime of the Electric Vehicles (EV) batteries are the main challenge in the EV industry as it is the most expensive component of the system. Conventional Fast Charging (FC) methods cannot attain better lifetime. Recently, Pulsed Charging (PC) has gained attention as a promising alternative due to its potential benefits for battery lifetime extension. In PC, the instantaneous charging power is higher than the average power. Thus, bulky storage capacitors at the input side of the DC/DC are adopted to keep the input power constant and manage to deliver the instantaneous output power imbalance, resulting in an increase in size, volume and cost. In this work, an Active Ripple Energy Compensator (AREC) is proposed, being directly connected to the DC/DC converter output, i.e., across the battery. The adoption of a storage capacitor which is interfaced with the battery through this dedicated converter allows to remove the constraints associated with its voltage ripple and huge reduction of the needed capacitance is therefore possible. Concept, AREC topology selection, design, and simulation are provided to validate the proposed method and highlight its advantages over conventional solution.
Optimized DC/DC Converters for Pulsed Charging of Electric Vehicles Batteries Adopting Active Ripple Energy Concepts
Petrella R.
2026-01-01
Abstract
Lifetime of the Electric Vehicles (EV) batteries are the main challenge in the EV industry as it is the most expensive component of the system. Conventional Fast Charging (FC) methods cannot attain better lifetime. Recently, Pulsed Charging (PC) has gained attention as a promising alternative due to its potential benefits for battery lifetime extension. In PC, the instantaneous charging power is higher than the average power. Thus, bulky storage capacitors at the input side of the DC/DC are adopted to keep the input power constant and manage to deliver the instantaneous output power imbalance, resulting in an increase in size, volume and cost. In this work, an Active Ripple Energy Compensator (AREC) is proposed, being directly connected to the DC/DC converter output, i.e., across the battery. The adoption of a storage capacitor which is interfaced with the battery through this dedicated converter allows to remove the constraints associated with its voltage ripple and huge reduction of the needed capacitance is therefore possible. Concept, AREC topology selection, design, and simulation are provided to validate the proposed method and highlight its advantages over conventional solution.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
