On-board obc control circuit capable of bidirectionally charging and discharging and control method thereof

Abstract

The present invention discloses an on-board OBC control circuit capable of bidirectionally charging and discharging and a control method thereof. The OBC control circuit includes a switch module that connects an out-vehicle electric circuit and an in-vehicle electric circuit, and a bidirectional on-board OBC that operates in a charge mode, in a contravariant mode and in the AC/AC mode. In the charge mode, the out-vehicle electric circuit charges the bidirectional on-board OBC through the switch module; in the contravariant mode, the bidirectional on-board OBC discharges the out-vehicle electric circuit and/or the in-vehicle electric circuit through the switch module; in the AC/AC mode, the out-vehicle electric circuit connects the in-vehicle electric circuit through the switch module. When the OBC is in an in-vehicle discharge mode, the relay connected to the out-vehicle L-wire is kept break-contact, and the charging port of the vehicle is completely disconnected from the circuit.