Patent ID: 11926229
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 3:
4. A method of control of a charging device for charging a battery with an alternating-current power supplied from a three-phase power supply which includes a first-phase power supply, a second-phase power supply, and a third-phase power supply,
the charging device including:
a first converter that converts the alternating-current power into a direct-current power;
a second converter that converts an output voltage from the first converter into a voltage for the battery, and supplies the voltage to the battery;
a first relay disposed between the first-phase power supply and the first converter, a second relay disposed between the second-phase power supply and the first converter, and a third relay disposed between the third-phase power supply and the first converter; and
a pre-charge resistor connected in parallel to the first relay, wherein
the first converter and the second converter are connected by a first power line and a second power line,
the first converter includes:
a power factor correction circuit that improves a power factor of an electric power supplied from the three-phase power supply and boosts a voltage of the alternating-current power; and

a capacitor that smooths a direct-current voltage supplied from the power factor correction circuit and supplies the smoothed direct-current voltage to the second converter, the capacitor being connected to each of the first power line and the second power line,
the second power line is directly connected to a neutral point of the three-phase power supply, the method comprising:
upon connection of the charging device to the three-phase power supply, opening the first relay, the second relay, and the third relay, and pre-charging the capacitor via the pre-charge resistor;
after pre-charging of the capacitor is completed, closing the first relay and controlling the power factor correction circuit to boost a voltage of the capacitor to a target voltage; and
after boosting the voltage of the capacitor to the target voltage, closing the second relay and the third relay.