Bidirectional on-board charger and method of controlling the same

Patent metadata

Field	Value
Publication number	US-11264821-B2
Application number	US-201916693632-A
Country	US
Kind code	B2
Filing date	Nov 25, 2019
Priority date	Mar 26, 2019
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

The present invention relates to a bidirectional on-board charger (OBC) and a method of controlling the same. The bidirectional on-board charger according to the present invention includes: an input power source which is a power source of a charging control system; a power factor corrector (PFC) which is connected to the input power source; a direct current/direct current (DC/DC), circuit which is connected to the power factor corrector and includes a switching unit and an output terminal; a first switch which is On/Off controlled to connect any one of: a first line for connecting the input power source and the power factor corrector and a second line for connecting the power factor corrector and an output terminal of the DC/DC circuit; and a second switch which is disposed between the switching unit and the output terminal of the DC/DC circuit and On/Off controlled.

First claim

What is claimed is:

1. A bidirectional on-board charger, comprising:
an input power source which is a power source of a charging system;
a power factor corrector (PFC) connected to the input power source;
a direct current/direct current (DC/DC) circuit connected to the power factor corrector and having a switching unit and an output terminal;
a first switch that connects any one of; a first line for connecting the input power source and the power factor corrector, or a second line for connecting the power factor corrector and an output terminal of the DC/DC circuit; and
a second switch disposed between the switching unit and the output terminal of the DC/DC circuit and that selectively connects the switching unit and the output terminal.

2. The bidirectional on-board charger of claim 1 , wherein the first switch is turned on and the second switch is turned off to connect the first line during a charging operation.

3. The bidirectional on-board charger of claim 1 , wherein the first switch is turned on and the second switch is turned on to connect the second line during a discharging operation.

4. A bidirectional on-board charger, comprising:
an input power source which is a power source of a charging system;
a power factor corrector (PFC) connected to the input power source;
a direct current/direct current (DC/DC) circuit connected to the power factor corrector and having a switching unit and an output terminal;
a third switch disposed between the input power source and an input terminal of the power factor corrector and that selectively connects the input power source and the input terminal of the power factor corrector;
a fourth switch disposed between the input power source and an output terminal of the DC/DC circuit and that selectively connects the input power source and the output terminal of the DC/DC circuit; and
a fifth switch disposed between the switching unit and the output terminal of the DC/DC circuit and that selectively connects the switching unit and the output terminal.

5. The bidirectional on-board charger of claim 4 , wherein the third switch is turned on, the fourth switch is turned off, and the fifth switch is turned off during a charging operation.

6. The bidirectional on-board charger of claim 4 , wherein the third switch is turned off, the fourth switch is turned on, and the fifth switch is turned on during a discharging operation.

7. The bidirectional on-board charger of claim 4 , wherein the power factor corrector is a 3-leg PFC for a three-phase charging.

8. The bidirectional on-board charger of claim 4 , wherein the DC/DC circuit includes an electric transformer, a full bridge at a primary side of the electric transformer, a bridge diode at a secondary side of the electric transformer, and a capacitor at the output terminal.

9. The bidirectional on-board charger of claim 4 , wherein a high-voltage battery is connected to the output terminal of the DC/DC circuit.

10. A method of controlling a bidirectional on-board charger, the method comprising:
turning on, by a controller, a first switch included in a power factor corrector of the bidirectional on-board charger to connect a first line for connecting an input power source and the power factor corrector of the bidirectional on-board charger;
turning off, by the controller, a second switch connected between a switching unit and an output terminal of a direct current/direct current (DC/DC) circuit of the bidirectional on-board charger; and
starting, by the bidirectional on-board charger, a charging operation when the first switch is turned on and the second switch is turned off so that the first line is connected.

11. A method of controlling a bidirectional on-board charger, the method comprising:
turning on, by a controller, a first switch included in a power factor corrector of the bidirectional on-board charger to connect a second line for connecting the power factor corrector and an output terminal of a direct current/direct current (DC/DC) circuit of the bidirectional on-board charger;
turning on, by the controller, a second switch connected between a switching unit and the output terminal of the DC/DC circuit; and
starting, by the bidirectional on-board charger, a discharging operation when the first switch is turned on and the second switch is turned on so that the second line is connected.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Yang Si-Hun
• Kim Jong-Pil
• Yang Jin-Young
• Yang Jin-Myeong
• Lee Woo-Young

Classifications

• H02J7/90

  Regulation of charging or discharging current or voltage · CPC title

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• B60L53/20 Primary

  characterised by converters located in the vehicle · CPC title