21 Mar EV truck charging system for heavy-duty and passenger transport
(Oilandgaspress) – Charging infrastructure for battery-powered heavy-duty and passenger transport is crucial for a successful transportation transition. The trend here is toward higher charging power and, consequently, higher charging currents and voltages. The collaborative project “HV-MELA-BAT” therefore developed the power electronic converters required for XXL charging, as well as a con-tact system for high currents and voltages.
Thanks to a high switching frequency, the isolated DC/DC converter achieves a volumetric power density of 9 kW/l while maintaining a record-breaking efficiency of 99.26 percent. A buffer storage unit was integrated to ensure full charging power even at power-limited grid connection points. As part of the research project, the project team developed the core components required for XXL charging: power electronic converters such as the grid-side rectifier, an modular interconnection of DC/DC converters for galvanic isolation and DC/DC converters for adjusting the charging voltages, as well as the contact system for high voltages and currents.
The charging system was supplemented by a buffer storage system made from second-life passenger car batteries. The storage system reduced the required grid connection capacity of the charging station to 500 kW; it also buffers high load peaks, thereby reducing the load on the grid. The MCS system developed in the project was designed to be flexible in order to cover the widest possible range of charging voltages and vehicle types. It is downward compatible with the existing CCS charging standard. The project team also investigated the modular configuration of up to four 250-kW charging points and the integration of renewable energy sources (e.g., photovoltaic systems) and loads within the system. The solar power can be used directly for the charging station or fed into the buffer storage.
Information Source: Read More
Sorry, the comment form is closed at this time.