Abstract: In at least one embodiment a system including at least one switch, at least one transformer, a first active bridge and at least one controller. The at least one switch receives a first direct current (DC) input signal from a first DC charging station. The at least one transformer includes a primary side and a secondary side. The secondary side of the at least one transformer is connected to the at least one switch and transfers the first DC input signal. The first active bridge is positioned on the secondary side, the first active bridge generates a DC output signal that supplies one or more vehicle loads. The DC output signal is greater than the first DC input signal and the at least one controller programmed to activate the at least one switch in response to receiving the first DC input signal.

Abstract: A voltage balancing circuit includes a direct-current-to-direct-current (DC-to-DC) voltage converter interconnecting a first battery having a first voltage and a second battery having a second voltage, wherein the DC-to-DC converter transfers electrical power from the first battery to the second battery when the first voltage is greater than the second voltage, and transfers electrical power from the second battery to the first battery when the first voltage is less than the second voltage, and wherein the transfer of electrical power from the first battery to the second battery or from the second battery to the first battery balances the electrical power difference between the first battery and the second battery.

Abstract: A voltage converter includes a converter stage having a direct current to direct current (DC-to-DC) voltage converter, wherein the converter stage receives a first DC voltage and outputs a second DC voltage different than the first DC voltage. The voltage converter also includes a boost pre-stage having a boosting circuit and a capacitor, wherein the boost pre-stage receives a DC voltage from a battery and outputs a boosted DC voltage to the converter stage as the first voltage, wherein the boosted DC voltage is greater than the DC voltage from the battery. The boosted DC voltage of the boost pre-stage output to the converter stage provides fault resistant operation of the converter stage in the event of one or more fluctuations in an operating range of the DC voltage from the battery.

Abstract: In at least one embodiment, a battery charger is provided. The battery charger includes at least one transformer, a first active bridge, a second active bridge, and a pulsating buffer (PB) converter. The first active bridge is positioned on a first side of the transformer to provide a first voltage signal based on an input voltage signal from a mains supply of an electrical grid. The second active bridge is positioned on a second side of the transformer to provide a second voltage signal to store on one or more batteries based on the first voltage signal. The PB converter includes a plurality of switching devices to interface with the second active bridge to modify the second voltage signal. The plurality of switching devices provide a voltage for storage on at least one capacitor of the PB converter while modifying the second voltage signal.

Abstract: A DC/DC converter applies a dual active bridge (DAB) topology to convert an input DC voltage into an output DC voltage. The DC/DC converter includes a transformer, a primary stage, and a secondary stage. The primary stage includes an inductor, a first H-bridge arm having first and second power switches connected at a first node therebetween, and a second H-bridge arm having first and second capacitors connected at a second node therebetween. The inductor is connected between the first node and a terminal of an input port of the primary stage. The primary stage receives the input DC voltage at the input port of the primary stage and converts the input DC voltage into a first AC voltage. The transformer transforms the first AC voltage into a second AC voltage. The secondary stage converts the second AC voltage into the output DC voltage.

Abstract: Systems and methods for balancing phase currents of the phases of a multiphase converter include alternately connecting the phases during respective intervals to an input current and sampling, at a node of the multiphase converter that is common to the phases, the input current provided to the phases to obtain respective input current samples for the phases. While the input current samples are unequal, the intervals are adjusted to minimize inequality of the input current samples and thereby balance the phase currents.

Abstract: Systems and methods for balancing phase currents of the phases of a multiphase converter include alternately connecting the phases during respective intervals to an input current and sampling, at a node of the multiphase converter that is common to the phases, the input current provided to the phases to obtain respective input current samples for the phases. While the input current samples are unequal, the intervals are adjusted to minimize inequality of the input current samples and thereby balance the phase currents.