Automobile association VAB asked the E&A research group of the KAHO Sint-Lieven college to develop an intervention vehicle in cooperation with a number of industrial partners. The intervention vehicle has to be able to recover electric vehicles in a very environmentally friendly, efficient way and had to meet three conditions:
- The intervention vehicle must run on natural gas (CNG) rather than diesel.
- The intervention vehicle must have a battery pack on board with sufficient green power for breakdown recovery of four electric cars.
- Additional power can be drawn from rapeseed oil by a highly efficient hybrid power unit on board the intervention vehicle.
The lithium power pack consists of 16 LiFeYPO4 lithium cells of 3.2V with energy storage of 20.5kWh on 48VDC. The lithium battery pack is charged with 3 powerful Victron Energy Quattro 48/8000 inverters/chargers, which reduce charging time to 4 hours. The Quattros run on the power unit (generator). The Quattros are used as inverters to power the fast chargers for the batteries of stranded electric cars. The system is set up as a 3-phase 3x400V+N network on the AC side.
Ysebaert supplied the energy system, which was designed and installed together with KAHO Sint-Lieven college.