Electric Vehicles (EVs) have developed greatly under the government supporting to relieve energy crisis and pollution issues in recent years. However, there still is a problem to restrict further development of EVs: how to efficiently and fast charge them. So, a kind of high-output-power and high-efficiency charging module may be a useful key to solve the problem. However, the conventional charging modules with using Silicon (Si) devices couldn’t own high efficiency, because there are a lot of power losses caused by power semiconductors and magnetic devices. Hence, reducing the amount of power semiconductors and magnetic devices to decrease power loss is a useful way to realize high efficiency. Therefore, according to the idea, this paper plans to design and implement a 15 kW DC/DC converter charging for EVs with LLC resonant topology and Silicon-Carbide (SiC) devices to realize high efficiency; the proposed converter could reach about 98.4%, which is calculated at rated full-load condition. And some detailed comparison between the conventional converter and proposed converter about conversion efficiency and other aspects is shown in Section II in this paper.