Energy management using a quick charger with storage batteries for electric vehicles

We developed an Electric Vehicle Quick Charger (EVQC) incorporating storage batteries and conducted a verification field test. This EVQC is equipped with demand control features which reduce economic burdens by suppressing the peak power load for EV charging, while also saving charging time by reducing the input power from the utility through the use of power stored in internal batteries. These batteries are charged by using surplus power from the PV generation system on the rooftop or from night-time power. We also verified the method for monitoring the deterioration state of these daily-use storage batteries.In this paper, the field test results of the EVQC incorporating storage battery systems are reported.