POWER CONVERSION DEVICE

• US 20150175021A1
• Filed: 08/07/2014
• Published: 06/25/2015
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: KIM, Woo Sup, LEE, Jae Ho, PARK, Hong Tae, KIM, Young Min
• Granted Patent: US 9,499,060 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A power conversion device for charging first and second batteries is provided. The power conversion device includes an input unit, a first power conversion unit, a second power conversion unit, a third power conversion unit, and a switching unit connecting the first power conversion unit to the second power conversion unit in the first operation mode according to a control signal supplied from the outside, the switching unit connecting the second power conversion unit to the third power conversion unit in the second operation mode according to the control signal supplied from the outside.

Claims

1. A power conversion device for charging first and second batteries, the power conversion device comprising:

an input unit converting a commercial alternating current (AC) power supplied from the outside into a direct current (DC) power to output the converted DC power;

a first power conversion unit converting the DC power converted through the input unit into an AC power to output the converted AC power;

a second power conversion unit converting the AC power converted through the first power conversion unit into a DC power to charge the first battery in a first operation mode, the second power conversion unit converting the DC power outputted through the first battery into an AC power in a second operation mode;

a third power conversion unit converting the AC power converted through the second power conversion unit into a DC power to charge the second battery in the second operation mode; and

a switching unit connecting the first power conversion unit to the second power conversion unit in the first operation mode according to a control signal supplied from the outside, the switching unit connecting the second power conversion unit to the third power conversion unit in the second operation mode according to the control signal supplied from the outside.

2. The power conversion device according to claim 1, wherein, in the first operation mode, the third power conversion unit is stopped in operation as the third power conversion unit is not connected to the switching unit, and

in the second operation mode, the first power conversion unit is stopped in operation as the first conversion unit is not connected to the switching unit.

3. The power conversion device according to claim 1, wherein the second power conversion unit comprises a first common circuit and a second common circuit which operate in the first and second operation modes.

4. The power conversion device according to claim 3, wherein the first common circuit rectifies the AC power outputted through the first power conversion unit to convert the rectified AC power into the DC power in the first operation mode and converts the DC power outputted through the second common circuit into the AC power in the second operation mode.

5. The power conversion device according to claim 3, wherein the second common circuit functions as an output filter with respect to the DC power supplied to the first battery in the first operation mode and functions as an input filter with respect to the DC power supplied to the first common circuit in the second operation mode.

6. The power conversion device according to claim 3, wherein the first common circuit is constituted by a plurality of active switching elements.

7. A power conversion device comprising:

a first switching element;

a second switching element comprising a drain electrode connected to a source electrode of the first switching element and a source electrode connected to a source electrode of a fourth switching element;

a third switching element comprising a drain electrode connected to a drain electrode of the first switching element and a source electrode of a drain electrode of the fourth switching electrode;

the fourth switching element comprising the drain electrode connected to the source electrode of the third switching element and the source electrode connected to the source electrode of the second switching element;

an inductor of which one end is connected to the drain electrode of the third switching element and the other end is connected to one end of a first capacitor and one end of a high voltage battery;

a capacitor of which one end is connected to the other end of the inductor and the other end is connected to the other end of the high voltage battery and the source electrode of the fourth switching element; and

a switch of which one end is selectively connected to any one of a high voltage charger and a low voltage charger and the other end is connected between the source electrode of the first switching element and the drain electrode of the second switching element.

8. The power conversion device according to claim 7, wherein each of the first to fourth switching elements comprises an active switching element.

9. The power conversion device according to claim 8, wherein each of the first to fourth switching element functions as a rectifier when the one end of the switch is connected to the high voltage charger and functions as an input switching unit converting the DC power into the AC power when the one end of the switch is connected to the low voltage charger.

10. The power conversion device according to claim 8, wherein each of the inductor and the capacitor functions as an output filter of the high voltage charger when the one end of the switch is connected to the high voltage charger and functions as an input filter of the low voltage charger when the one end of the switch is connected to the low voltage charger.