SYSTEM, APPARATUS AND METHOD FOR CONTROLLING CHARGE AND DISCHARGE OF ELECTRIC VEHICLE

• US 20110282513A1
• Filed: 05/04/2011
• Published: 11/17/2011
• Est. Priority Date: 05/13/2010
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: Oh, Jung Hwan, Park, Jae Seong, SON, Dong Min
• Granted Patent: US 8,831,786 B2
• Time in Patent Office: Days
• US Class Current: 700/297
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/62 in response to charging parameters, e.g. current, voltage or electrical charge
• CPC Class Codes: B60L 53/64 Optimising energy costs, e.g. responding to electricity rates
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• 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: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 3/008 involving trading of energy or energy transmission rights
• CPC Class Codes: H02J 3/322 the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• 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 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 30/12 Remote or cooperative charging
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing
• CPC Class Codes: Y04S 50/10 : Energy trading, including energy flowing from end-user application to grid

Abstract

Disclosed is a technique using an electric vehicle. The technique enables a user to set the operation plan of the electric vehicle and the price of electricity used to charge/discharge an electric vehicle battery. The electric vehicle battery is charged, or the electric energy charged in the electric vehicle battery is collected, according to the set information. Accordingly, it is possible to charge the electric vehicle battery at the price approved by the user under variable pricing of electric energy. When the price of electricity increases or there is no operation plan of the electric vehicle, the electric energy stored in the battery is collected to operate electric devices or resell the stored electric energy to an electric power company, thereby obtaining economic benefit. As the spread of electric vehicles are extended, it can be expected to save a considerable amount of electric energy throughout the whole society.

Claims

1. A system for controlling charge and discharge of an electric vehicle, the system comprising:

an operation mode determination unit configured to determine the presence of operation after an electric vehicle battery is charged from an electric vehicle user;

a first input unit configured to receive a price of electricity required in the charge of the electric vehicle battery, inputted from the electric vehicle user;

a second input unit configured to receive a price of electricity generated in the discharge of the electric vehicle battery, inputted from the electric vehicle user;

a charge unit configured to charge the electric vehicle battery when the price of electricity is less than that inputted through the first input unit, in a first mode in which the electric vehicle is operated after the electric vehicle battery is charged; and

a charge and discharge unit configured to charge the electric vehicle battery when the price of electricity is less than that inputted through the first input unit and discharge the electric vehicle battery when the price of electricity exceeds that inputted through the second input unit, in a second mode in which the electric vehicle is not operated after the electric vehicle battery is charged.

2. A system for controlling charge and discharge of an electric vehicle, the system comprising:

a reception unit configured to receive information on the price of electricity according to time from a central server;

an operation mode determination unit configured to determine the presence of operation after an electric vehicle battery is charged from an electric vehicle user;

a first input unit configured to receive a price of electricity required in the charge of the electric vehicle battery, inputted from the electric vehicle user;

a second input unit configured to receive a price of electricity generated in the discharge of the electric vehicle battery, inputted from the electric vehicle user;

a charge unit configured to charge the electric vehicle battery when the price of electricity according to the information on the price of electricity, received through the reception unit, is less than that inputted through the first input unit, in a first mode in which the electric vehicle is operated after the electric vehicle battery is charged; and

a charge and discharge unit configured to charge the electric vehicle battery when the price of electricity according to the information on the price of electricity, received through the reception unit, is less than that inputted through the first input unit and discharge the electric vehicle battery when the received price of electricity exceeds that inputted through the second input unit, in a second mode in which the electric vehicle is not operated after the electric vehicle battery is charged.

3. The system of claim 2, wherein the operation mode determination unit receives information on the operation mode, inputted through a user'"'"'s portable terminal or in home display (IHD).

4. The system of claim 2, further comprising a measurement unit configured to calculate an electricity rate in the charge or discharge of the electric vehicle battery.

5. The system of claim 4, further comprising a transmission unit configured to transmit information on the electricity rate calculated by the measurement unit to at least one of the central server, the user portable terminal and the user IHD.

6. The system of claim 4, wherein the measurement unit estimates at least one of electricity rates in the charge and discharge using information on the capacity of the electric vehicle battery.

7. The system of claim 6, wherein the measurement unit estimates an electricity rate to be received from an electric power company based on the information on the price of electricity, inputted through the first and second input units, and further comprises a transmission unit that transmits information on the estimated electricity rate to at least one of the central server, the user portable terminal and the user IHD.

8. The system of claim 4, wherein the measurement unit monitors whether the rate of electricity required to charge the electric vehicle battery for a specific period of time exceeds a predetermined maximum value, and further comprises a transmission unit that transmits a warning message to at least one of the user portable terminal and IHD based on the monitored result.

9. The system of claim 2, wherein the first input unit further receives charge-amount reference information from the user, and the charge unit and the charge and discharge unit charge the electric vehicle battery according to the charge-amount reference information.

10. The system of claim 2, wherein the second input unit further receives discharge-amount reference information from the user, and the charge and discharge unit discharges the electric vehicle battery according to the discharge-amount reference information.

11. A method for controlling charge and discharge of an electric vehicle, the method comprising:

determining the presence of operation after an electric vehicle battery is charged from an electric vehicle user;

receiving a price of electricity required in the charge of the electric vehicle battery, inputted from the electric vehicle user;

receiving a price of electricity generated in the discharge of the electric vehicle battery, inputted from the electric vehicle user;

charging the electric vehicle battery when the price of electricity is less than that inputted through the first input step, in a first mode in which the electric vehicle is operated after the electric vehicle battery is charged; and

charging the electric vehicle battery when the price of electricity is less than that inputted through the first input step and discharging the electric vehicle battery when the price of electricity exceeds that inputted through the second input step, in a second mode in which the electric vehicle is not operated after the electric vehicle battery is charged.

12. A method for controlling charge and discharge of an electric vehicle, the method comprising:

a reception step receiving information on the price of electricity according to time from a central server;

an operation mode determination step determining the presence of operation after an electric vehicle battery is charged from an electric vehicle user;

a first input step receiving a price of electricity required in the charge of the electric vehicle battery, inputted from the electric vehicle user;

a second input step receiving a price of electricity generated in the discharge of the electric vehicle battery, inputted from the electric vehicle user;

a charge step charging the electric vehicle battery when the price of electricity according to the information on the price of electricity, received through the reception step, is less than that inputted through the first input step, in a first mode in which the electric vehicle is operated after the electric vehicle battery is charged; and

a charge and discharge step charging the electric vehicle battery when the price of electricity according to the information on the price of electricity, received through the reception step, is less than that inputted through the first input step and discharging the electric vehicle battery when the received price of electricity exceeds that inputted through the second input step, in a second mode in which the electric vehicle is not operated after the electric vehicle battery is charged.

13. The method of claim 12, wherein the first input step further receives charge-amount reference information from the user, and the charge step and the charge and discharge step charge the electric vehicle battery according to the charge-amount reference information.

14. The method of claim 12, wherein the second input step further receives discharge-amount reference information from the user, and the charge and discharge step discharges the electric vehicle battery according to the discharge-amount reference information.

15. The method of claim 12, wherein the operation mode determination step receives information on the operation mode, inputted through a user portable terminal or IHD.

16. The method of claim 12, further comprising a measurement step calculating an electricity rate for the charge performed in the charge step and the charge and discharge step, and an electricity rate for the discharge performed by the charge and discharge step.

17. The method of claim 16, wherein the electricity rate calculated in the measurement step is transmitted to at least one of the central server, the user portable terminal and the user IHD.

18. The method of claim 16, wherein the measurement step estimates at least one of electricity rates in the charge and discharge using information on the capacity of the electric vehicle battery.

19. The method of claim 18, wherein the measurement step estimates an electricity rate to be received from an electric power company based on the price of electricity inputted in the first input step and the price of electricity inputted in the second input step, and transmits information on the estimated electricity rate to at least one of the central server, the user portable terminal and the user IHD.

20. The method of claim 16, wherein the measurement step monitors whether the rate of electricity required to charge the electric vehicle battery for a specific period of time exceeds a predetermined maximum value, and transmits a warning message to at least one of the user portable terminal and IHD based on the monitored result.