Seite - 76 - in Hybrid Electric Vehicles

In contrast, in case of charging using the BAC, the first and second vehicles can enjoy almost the same charging rate, and both vehicles reach battery SOC of 80% in almost the same time (about 35 min). Furthermore, the electricity from electrical grid can be kept below the con- tracted power capacity, although the total charging rate for both vehicles is larger than the contracted power capacity. This is because the battery assisting the system was discharged to supply electricity. Hence, compared to a conventional charging system, BAC is able to achieve high-quality charging with higher charging rate during simultaneous charging. Figure 5 shows the results of simultaneous charging of two vehicles during summer per- formed using conventional charging system and BAC. A same tendency with charging during Figure 5. Charging of two BEVs during summer with different charger: (a) conventional charger, (b) developed BAC. Hybrid Electric Vehicles76