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On-board charger applications
Release time:
2024-06-04 10:33
The on-board charger (OBC) is the system built into the car to recharge the high voltage battery from the AC grid while the vehicle is parking. Higher driving ranges of the plug-in hybrid (PHEV) and battery electric (BEV) vehicles are realized by increasing the battery capacity and the energy efficiency of the electric components. The used battery voltage classes tend to become standardized at approx. 450 V with a trend towards higher voltages, as this supports faster charging times and enables lighter cabling within the Discrete high voltage components are widely used for OBC (on-board charger) applications, as price pressure increasingly displaces module-based solutions. The trend towards fast charging also impacts on the power range demanded from OBC topologies, therefore new designs trend towards 11 kW or even up to 22 kW. This development, paired with a demand for high efficiency and power density at low system cost, is a strong driver for the usage of three-phase solutions. Today typically there is a unidirectional power flow from the grid to the battery, but there is also bidirectional use cased like a battery to load or battery to grid.
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