Lear Corporation
Configurable multi-phase charger

Abstract:

An on-board charger (OBC) for charging a traction battery of an electric vehicle includes a primary phase, a secondary phase, and a pre-charge circuit. Each phase includes a circuit having an input and an output. The primary phase circuit input is connectable to a mains supply to connect the primary phase to the mains supply. The secondary phase circuit input has an input capacitor. The pre-charge circuit is connected between the circuit outputs and is switchable between an opened state in which the pre-charge circuit disconnects the circuit outputs and a closed state in which the pre-charge circuit connects the circuit outputs. When the pre-charge circuit is in the closed state, an electrical current may flow through the pre-charge circuit from the primary phase circuit output to the secondary phase circuit output and through the secondary phase circuit to the input capacitor to charge the input capacitor.