MANAGING AND OPTIMIZING ENERGY SUPPLY FROM GRID AND RENEWABLE SOURCE WITH ELECTRIC VEHICLE SUPPLY EQUIPMENT

• US 20170088001A1
• Filed: 09/28/2015
• Published: 03/30/2017
• Est. Priority Date: 09/28/2015
• Status: Active Grant

• Current Assignee: Siemens Industry Incorporated (Siemens AG)
• Original Assignee: Siemens Industry Incorporated (Siemens AG)
• Inventors: Yeruva, Sesha Devasena, Dayagi, Celia, Haas, Harry Price
• Granted Patent: US 10,647,209 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/64 Optimising energy costs, e.g. responding to electricity rates
• CPC Class Codes: B60L 53/68 Off-site monitoring or control, e.g. remote control
• 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 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

Abstract

An electric vehicle supply equipment (EVSE) charging system includes an EVSE charging station that is configured to switch a power source between a first power source and a second power source based on a time of use or real-time energy pricing data from a utility. Switching additionally and/or optionally may be based on at least one of charging information and metering information. The first power source may be a renewable source and the second source may be the power grid. In this way, a smart electric vehicle supply equipment (EVSE) charging station may manage and optimize energy supply from a grid and a renewable source when charging an electric vehicle (EV) with the smart the EVSE charging station.

Claims

1. An electrical supply system for an electric vehicle (EV), the system comprising:

an electric vehicle supply equipment (EVSE) charging station including a meter, a switch, a controller and a wireless communication unit, the EVSE charging station configured to couple to the EV for electrically charging a battery of the EV, the wireless communication unit is configured to communicate with a wireless communication device that is configured to communicate with a EVSE server and a utility server, the EVSE server is configured to communicate with a user communication device,

wherein the meter is operable to receive charging information from one or more sources and provide metering information of a first power source and a second power source by measuring values of at least one of charge current and charge voltage and calculate one or more energy usage parameters including charge power usage or charge energy usage from the measured values of charge current and/or charge voltage,

wherein the switch is configured to couple to the first power source and the second power source, the first power source to receive energy from a renewable power source to charge the battery of the EV and the second power source to receive energy from a power grid to charge the battery of the EV, the switch is operable to switch between the first power source and the second power source, and

wherein the controller is configured to control the switch by switching between the first power source and the second power source based on a time of use or real-time energy pricing data from a utility and optionally based on at least one of the charging information and the metering information.

2. The system of claim 1, wherein the time of use or real-time energy pricing data is a set peak demand limit for a load center, wherein the set peak demand limit is an indication of a value of total energy consumption of the load center.

3. The system of claim 2, wherein the peak demand limit is established by a do not exceed energy demand limit value to keep the energy demand of the load center and the EV at or below the peak demand limit.

4. The system of claim 2, wherein the EVSE charging station is configured to monitor the total energy consumption of the load center and switch a power source between the first and second power sources based on the set peak demand limit.

5. The system of claim 1, further comprising:

a smart meter device including a communication capability adapted to communicate with the EVSE charging station, the smart meter device coupled to the power grid; and

a power supplier coupled to a load center, the load center coupled to the EVSE charging station, the smart meter device coupled to the load center to provide electricity to the EVSE charging station,

wherein the load center includes a plurality of loads each having a circuit branch, the EVSE charging station is configured to gather metering information from each circuit branch of the plurality of loads and determine a power source between the first and second power sources based on the metering information.

6. The system of claim 5, wherein the EVSE charging station is configured to interface with the smart meter device to obtain a total power value.

7. The system of claim 1, wherein the second power source is used during non-peak hours and periods when the first power source is unavailable.

8. The system of claim 1, wherein the EVSE charging station is configured to report to at least one of a user and a utility power data including renewable power generated by the first power source and power consumed by the load center.

9. The system of claim 1, wherein the EVSE charging station is configured to monitor and measure power used by the EV from the first power source and power used by the EV from the second power source.

10. The system of claim 1, wherein the EVSE charging station is configured to interface with a power inverter connected to the first power source to charge the battery of the EV.

11. The system of claim 1, wherein the EVSE charging station is configured to interface with a power inverter through a communication gateway to obtain total renewable power generated and receive status data.

12. The system of claim 1, wherein the EVSE charging station is configured to control a flow of renewable power between the power grid, the EV and any loads on a load center.

13. The system of claim 1, wherein the EVSE charging station is configured to interface with branch circuit meters or any loads of a load center to obtain metering information and change a power source between the first and second power sources based on the metering information.

14. The system of claim 1, wherein the EVSE charging station is configured to monitor total renewable power used data to charge the battery of the EV and any loads of a load center and renewable power fed back to the power grid data and provide the total renewable power used data and the renewable power fed back to the power grid data to at least one of a user and a utility.

15. The system of claim 1, wherein the EVSE charging station is configured to enable charging of the battery of the EV from the first power source based on a request from a user.

16. The system of claim 1, wherein the time of use or real-time energy pricing data is a real-time price of energy from the power grid.

17. A method of supplying power to an electric vehicle (EV), the method comprising:

providing an electric vehicle supply equipment (EVSE) charging station for electrically charging a battery of the EV;

coupling a switch to a first power source and a second power source, the first power source to receive energy from a renewable power source to charge the battery of the EV and the second power source to receive energy from a power grid to charge the battery of the EV;

providing electricity to the EVSE charging station from a load center, a power supplier coupled to the load center, the load center coupled to the EVSE charging station, a smart meter device coupled to the load center, wherein the smart meter device including a communication capability adapted to communicate with the EVSE charging station, the smart meter device coupled to the power grid; and

controlling the switch for switching between the first power source and the second power source based on a time of use or real-time energy pricing data from a utility.

18. The method of claim 17, further comprising:

using a set peak demand limit for the load center as the time of use or real-time energy pricing data, wherein the set peak demand limit is an indication of a value of total energy consumption of the load center.

19. The method of claim 17, further comprising:

using a real-time price of energy from the power grid as the time of use or real-time energy pricing data.

20. The method of claim 17, further comprising:

switching to the second power source during non-peak hours and periods when the first power source is unavailable.

21. The method of claim 17, further comprising:

setting a user preference to select one power source from the first and second power sources; and

causing the EVSE charging station to use the selected power source first for a charging session and switch to the second power source only when the first power source is unavailable.

22. The method of claim 17, further comprising:

communicating power usage information of the EVSE charging station and distribution among multiple power sources over a wireless communication medium to a remote server for the purpose of allowing access to a utility and a user.

23. The method of claim 17, further comprising:

communicating real time data corresponding to power source selection of the EVSE charging station to other smart devices coupled to the load center or other loads capable of receiving communication wirelessly for allowing lowering or increasing a power consumed by the smart devices and other loads.