SYSTEM AND METHOD FOR PROVIDING REACTIVE POWER USING ELECTRIC CAR BATTERY

• US 20120139488A1
• Filed: 12/02/2011
• Published: 06/07/2012
• Est. Priority Date: 12/03/2010
• Status: Active Grant

• Current Assignee: SK On Company Limited (SK Innovation Company Limited)
• Original Assignee: SK Innovation Company Limited
• Inventors: LEE, Kil Su, YANG, Jeong Hwan, PARK, Sang Hyun
• Granted Patent: US 8,866,438 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: H02J 11/00 Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed or converted
• CPC Class Codes: H02J 3/1842 wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
• CPC Class Codes: Y02E 40/20 Active power filtering [APF]
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 : Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 10/126 : the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

Provided are a system and a method for providing reactive power using an electric car battery, and more particularly, a system and a method for providing reactive power to a micro-grid using a bidirectional charger that is an electric car battery and an electric car charging device.

Claims

1. A system for providing reactive power using the batteries in vehicles, comprising:

a high-voltage battery for a hybrid car, a plug-in hybrid car, or an electric car connected with outlets mounted in a home;

a power factor monitoring controller receiving status information on the high-voltage battery generated from a battery management system (BMS) included in the cars or the electric car through a communication unit included in the cars or the electric car and monitoring a power factor for at least one load mounted in the home and the high-voltage battery to calculate a power factor compensation value;

a bidirectional charger supplying power to the high-voltage battery or send the power from the high-voltage battery to the outside; and

a control unit controlling the bidirectional charger to send the power from the high-voltage battery to the outside as much as the calculated power factor compensation value, thereby compensating for the power as much as the power factor compensation value.

2. The system of claim 1, wherein the bidirectional charger, which is an on-board charger, includes a power factor control (PFC) circuit.

3. The system of claim 1, further comprising a micro-grid that supplies power to the bidirectional charger or receives the power of the high-voltage battery from the bidirectional charger.

4. The system of claim 1, wherein the power supply of the high-voltage battery is used as a leading load.

5. A method for providing reactive power using the batteries in vehicles, comprising:

connecting a high-voltage battery for a hybrid car, a plug-in hybrid car, or an electric car with outlets mounted in a home;

calculating a power factor compensation value by allowing a power factor monitoring controller to receive status information on the high-voltage battery generated from a battery management system (BMS) included in the cars or the electric car through a communication unit included in the cars or the electric car and monitor a power factor for at least one load mounted in the home and the high-voltage battery;

supplying power to the high-voltage battery or send the power from the high-voltage battery to the outside by a bidirectional charger; and

controlling, by a control unit, the bidirectional charger to send the power from the high-voltage battery to the outside as much as the calculated power factor compensation value, thereby compensating for the power as much as the power factor compensation value.

6. The method of claim 5, wherein the bidirectional charger, which is an on-board charger, includes a power factor control (PFC) circuit.

7. The method of claim 5, further comprising supplying power to the bidirectional charger or receiving the power of the high-voltage battery from the bidirectional charger by a micro-grid.

8. The method of claim 5, wherein the power supply of the high-voltage battery is used as a leading load.