An Analysis of SiC Power Electronics Implementation in Green Energy Based Extremely Fast Charging

Abstract

Existing extremely fast charging (XFC) of electrical vehicles (EVs) is based on silicon power electronics and internal conversion of AC power into DC power. In this paper it has been shown that silicon carbide power electronics and the use of DC power source in the design of XFC of EVs has many distinct advantages over current XFC of EVs. Silicon carbide power electronics provide reduction of charging time, higher power conversion efficiency, size reduction of heat sink and improved battery's state of health. The use of larger size silicon carbide wafers will further reduce the cost of power electronics based on silicon carbide. Use of green energy sources (solar and wind) and lithiumion batteries for electrical power storage can provide end to end DC power network. Such networks combined with silicon carbide based XFC of EVs can play a revolutionary role in saving green electrical and provide reduced of charging of EVs. This paper reports almost 50% reduction in power losses by using Silicon Carbide DC technology. End to end DC power networks combined with SiC based XFC of EVs can play a revolutionary role in solving climate emergency.

An 800V End to End SiC Powertrain to Accommodate Extremely Fast Charging

“…The battery loses its health due to two types of aging, calendar aging and cycle aging [7]. To calculate these losses a semi empirical formula for total loss [8] is given below.…”

“…The revolution is led by China and Europe with USA a distant third [7]. In author's recent review paper, we thoroughly reviewed the roadblocks and cited the possible avenues to implement a green charging infrastructure for electric vehicles [8]. In United States, the adoption of EVs is discouraged by the efficiency of fossil-fueled vehicle's fast refueling experience and the reservation towards 100% green power generation, unlike Europe and China [5].…”

“…In United States, the adoption of EVs is discouraged by the efficiency of fossil-fueled vehicle's fast refueling experience and the reservation towards 100% green power generation, unlike Europe and China [5]. To overcome these barriers a silicon carbide power electronics based green charging infrastructure is proposed [8]. In order to increase the overall system energy efficiency, replacement of Si operated powertrain must be implemented for keeping up to the higher-power charging infrastructure.…”