Charging systems for use with electric vehicles and methods of monitoring same

• US 8,823,330 B2
• Filed: 04/29/2011
• Issued: 09/02/2014
• Est. Priority Date: 04/29/2011
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Ree, Bradley Richard, Boot, John Christopher, Alexander, George William
• Primary Examiner(s): DIAO, M BAYE
• Application Number:
  US13/097,902
• Publication Number:
  US 20120274287A1
• Time in Patent Office: 1,222 Days
• Field of Search: 320/162, 320/109, 320/104
• US Class Current: 320/162
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/529 Current
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2250/12 by confirmation, e.g. of the input
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2260/22 Standstill, e.g. zero speed
• CPC Class Codes: B60L 2270/32 of electricity
• CPC Class Codes: B60L 2270/34 of parts
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/68 Off-site monitoring or control, e.g. remote control
• CPC Class Codes: H02J 7/00041 in response to measured battery parameters, e.g. voltage, current or temperature profile
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• 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 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

A system for monitoring operation of an electric vehicle charging station is provided. The system includes a battery charger configured to couple to a device for supplying current to the device, a current sensor coupled to the battery charger for measuring current supplied from the battery charger to the device, the current sensor configured to generate a measured current profile based on the measured current supplied to the device, and a processor coupled to the current sensor. The processor is configured to receive the measured current profile transmitted from the current sensor, and compare the measured current profile to at least one known current profile to monitor operation of the charging station.

Claims

1. A system for monitoring operation of an electric vehicle charging station, said system comprising:

a battery charger configured to couple to a device for supplying current to the device;

a current sensor coupled to said battery charger for measuring current supplied from said battery charger to the device, said current sensor configured to generate a measured current profile based on the measured current supplied to the device; and

a processor coupled to said current sensor, said processor configured to;

receive the measured current profile transmitted from said current sensor;

compare the measured current profile to at least one known current profile to monitor operation of the charging station; and

determine whether the device is at least one of an unauthorized device and a malfunctioning device based on the result of the comparison.

2. A system in accordance with claim 1, further comprising a database configured to store the at least one known current profile, said processor in communication with said database such that said processor is further configured to selectively retrieve the at least one known current profile from said database.

3. A system in accordance with claim 2, further comprising a user interface coupled to said processor, said user interface enables a user to input at least one known current profile into said database.

4. A system in accordance with claim 2, further comprising a network coupled to said processor, said database configured to download at least one known current profile from said network.

5. A system in accordance with claim 1, wherein said processor is further configured to compare the measured current profile to the at least one known current profile to determine whether the device is authorized for use with the charging station.

6. A system in accordance with claim 5, wherein said processor is further configured to generate and transmit an alert signal when said processor determines the device is unauthorized.

7. A system in accordance with claim 5, wherein said processor is further configured to prevent said battery charger from charging the device when said processor determines the device is unauthorized.

8. A system in accordance with claim 1, wherein said processor is further configured to compare the measured current profile to the at least one known current profile to determine whether the device coupled to said battery charger is malfunctioning.

9. A system in accordance with claim 8, wherein said processor is further configured to generate and transmit a notification when said processor determines the device is malfunctioning.

10. A system in accordance with claim 1, wherein said current sensor measures a rate of current supplied from said battery charger to the device, the measured current profile including the rate of current.

11. An electric vehicle charging station comprising:

a connector configured to couple to a device;

a battery charger configured to supply current the device via said connector a current sensor coupled to said battery charger for measuring current supplied from said battery charger to the device, said current sensor configured to generate a measured current profile based on the measured current supplied, to the device; and

a processor coupled to said current sensor, said processor configured to;

receive the measured current profile transmitted from said current sensor;

compare the measured current profile to at least one known current profile to monitor operation of said charging station, and

determine whether the device is at least one of an unauthorized vehicle, a non-vehicular device, and a malfunctioning device based on the results of the comparison.

12. A charging station in accordance with claim 11, wherein said processor is further configured to prevent said battery charger from supplying current to the device when said processor determines the device is at least one of an unauthorized vehicle, a non-vehicular device, and a malfunctioning device.

13. A charging station in accordance with claim 11, further comprising a display device, said processor further configured to generate and transmit a notification to said display device when said processor determines the device is malfunctioning.

14. A charging station in accordance with claim 11, wherein said current sensor measures a rate of current supplied from said battery charger to the device, the measured current profile including the rate of current.

15. A method for monitoring operation of an electric vehicle charging station, said method comprising:

supplying current to a device using a battery charger;

measuring the current supplied to the device;

generating a measured current profile based on the measured current supplied to the device;

transmitting the measured current profile to a processor;

comparing, using the processor, the measured current profile to at least one known current profile;

monitoring operation of the charging station based on the comparison of the measured current profile to the at least one known current profile; and

determining, using the processor, whether the device is at least one of unauthorized and malfunctioning based on the results of the comparison.

16. A method in accordance with claim 15, further comprising inhibiting the battery charger from supplying current to the device when the processor determines the device is at least one of unauthorized and malfunctioning.

17. A method in accordance with claim 15, further comprising:

generating a notification when the processor determines the device is unauthorized; and

transmitting the notification to a network coupled to the processor.

18. A method in accordance with claim 15, further comprising:

generating a notification when the processor determines the device is malfunctioning; and

transmitting the notification to a display device.