METHOD AND SYSTEM FOR PROTECTING ON-BOARD BATTERY CHARGER AGAINST TRANSITORY DISCONNECTIONS IN HIGH-VOLTAGE NETWORK

An on-board battery charger (OBC) includes a converter (e.g., a DC/DC converter) and a controller. An output port of the converter is connectable to a battery (e.g., a traction battery of an electric vehicle (EV)) via a voltage network (e.g., a high-voltage (HV) network of the EV). The converter converts an input power into an output power and outputs the output power onto the voltage network for charging the battery. The controller, upon detecting a transitory disconnection in the voltage network, controls the converter to stop converting the input power into the output power. In stopping the converter, the controller stops the converter prior to a corresponding reconnection in the voltage network. The controller may detect the transitory disconnection upon detecting a switching frequency of a power switch of the converter decreasing below a pre-defined threshold as the switching frequency decreases due to effects of the transitory disconnection.