A quick charger station for EVs using a pulse frequency technique

The half bridge modular converter configuration is used to perform the charging pulses with both positive and negative pulse. The positive pulse charge permits the high peak current charge: this will lead to quick charging mode; whereas, the negative pulse and idle state can offer low battery temperature rise. The frequency used for pulse charge technique can be varied depending on the type and condition of a battery. PSIM 9.0.3 is utilized for simulation study and the 500 W prototype is developed to validate the proposed notion. The simulation and experimental results illustrate that the proposed pulse frequency charging technique requires shorter time to fully charge battery at SOC 80% comparing to conventional constant current and constant voltage technique about 3 times at same average charging current. The temperature rise of pulse frequency charging technique is less than a conventional one about 1 °C: these can lead to quicker charge and longer battery lifetime. The results suggest that the proposed technique can be applied for an electric vehicle quick charger station.