Electric mobility faces two significant challenges that are closely interconnected: the lack of infrastructure and the range of electric vehicles. The charging system developed by Stercom, ICI (Inductive Charge Inverter), offers a solution for both aspects through inductive fast charging. "ICI demonstrates its potential particularly in public transportation. Buses in cities typically follow the same routes and pass by central hubs. These locations are ideal for a type of inductive pit stop," explains Robert Sterff, Managing Director of Stercom Power Solutions. Once a bus approaches one of the stops equipped with the integrated ICI system, the battery can be partially charged rapidly at up to 22 kW.
Fast Charging Through the Interaction of ICI and Supercapacitors
The installation of multiple charging stations along the bus route creates the necessary infrastructure, which in turn addresses the range issue. The possibility of continuous partial charging at the stops means that the size and range of the battery are no longer decisive; rather, it is the ability to charge quickly that matters. "The rapid partial charging at the stops is only possible through the use of high-performance batteries. Often, supercapacitors are used for this purpose, which can be fully recharged in just 15 minutes, such as at the final stop," says Sterff. Reducing the battery size also results in lower losses due to reduced heat generation, providing more space for payload and ultimately leading to a better cost-benefit ratio. The smaller battery size also contributes to energy savings and environmental benefits by decreasing the mass that needs to be accelerated.
Larger Air Gap Between Coils Possible
The system developed by Stercom Power Solutions enables highly efficient energy transfer over large air gaps of up to 20 cm through the use of state-of-the-art silicon carbide power switches and optimized coil control. This allows not only buses but also high-riding SUVs to be charged without the need to lower the secondary coil in the vehicle. The new, more powerful ICI system features automatic coverage detection, making it easier and faster to position the vehicle over the charging station, which is essential for optimal fast charging.
