Charger and driving method thereof

摘要

A charger for charging a high voltage battery and a low voltage battery, includes a bidirectional buck boost converter, a first full duty converter and a second full duty converter. The bidirectional buck boost converter is configured to supply power to the high voltage battery or supply power to the low voltage battery from the high voltage battery. The first full duty converter is configured to generate charging power by using an AC commercial power supply. The second full duty converter is connected to the first full duty converter and the bidirectional buck boost converter and configured to generate charging power in the low voltage battery.

主权项

1. A charger for charging a voltage battery, the charger comprising:
a bidirectional buck boost converter configured to supply power to a first voltage battery or supply power to a second voltage battery from the first voltage battery; a first converter configured to generate charging power by using an AC commercial power supply; a second converter connected to the first converter and the bidirectional buck boost converter and configured to generate charging power in the second voltage battery; and a relay configured to charge the second voltage battery, the relay connected between a node, which is connected to the first converter and the bidirectional buck boost converter, and the second converter, wherein the bidirectional buck boost converter comprises: a connection switch having one electrode connected to the first converter and the second converter; a synchronous switch having one electrode connected to the other electrode of the connection switch; an inductor connected to one electrode of the synchronous switch and the other electrode of the connection switch; and a first capacitor including one electrode connected to one electrode of the inductor and the other electrode connected to the other electrode of the synchronous switch.