500 kW 3-Phase Interleaved SiC Switched Tank Converter for Transportation Electrification

Electric vehicles (EVs) draw more attention nowadays since they have now direct vehicle emissions which are harmful to human health and the major source of greenhouse gases. Compared with traditional 400V or 800V EV battery architecture, a 1600V battery system attracts more attention which can use lighter, thinner wiring to charge at unprecedented speeds with less heat. In this paper, a three-phase interleaved switched tank converter is proposed and designed for 800V to 1600V transportation electrification applications. The operation principle is discussed with a detailed analysis and design of the component, including SiC MOSFET loss and thermal analysis, and the passive component is shown in this paper. The 3D structure of the designed prototype is shown in the paper with the double pulse test to validate the gate driver and busbar design. The estimated power density can reach 135 kW/L with an efficiency of 99.3% at 500kW load conditions.