急速充電所の混雑が電気自動車の充電電力量に与えた影響

抄録

A congestion at quick chargers (QCs) which increases the total travel time of EVs has occurred due to a massive spread of electric vehicles (EVs). In order to reduce this congestion, it is necessary to grasp the actual charging behavior of EVs and consider its measures. In this report, secular change of EV quick charging and its charged electricity amount were analyzed using 412 thousand charging histories from 2012 to 2014 by 509 QCs in Japan. The secular changes of charging revealed the decrease of charged electricity amount, the seasonal fluctuation of charging time, and the frequency of use. Analysis using the idle time of QCs showed that the charged electricity amount increases and decreases due to the congestion of chargers. When QC is crowded, the charged electricity amount by EVs increases on a highway and decreases on a general road. When the use of QC decreases, the charged electricity amount by EVs shows almost the same distribution for both highway and general road. It is assumed that the judgment on the necessity of charging by EVs is not influenced by the road type. In addition, the change of the charged electricity amount caused by the congestion and the road type was also discussed.