Method for monitoring a power coupler for a plug-in electric vehicle

• US 8,519,562 B2
• Filed: 07/30/2010
• Issued: 08/27/2013
• Est. Priority Date: 07/30/2010
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Gibbs, James C., Kinser, Christopher A., St. John, Don K.
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Zhang, Haihui
• Application Number:
  US12/846,987
• Publication Number:
  US 20120025842A1
• Time in Patent Office: 1,124 Days
• Field of Search: 307/9.1, 324/538, 320/109
• US Class Current: 307/9.1
• CPC Class Codes: G01R 31/69 of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances

Abstract

A method for monitoring a power coupler for a plug-in electric vehicle during a charging process, where the method may perform one of several alerts in the event that the vehicle stops receiving power. In an exemplary embodiment, the method performs a theft alert when the power coupler is physically unplugged or disconnected (this is intended to dissuade people from stealing the power coupler), and it performs a power loss alert when there is a loss of electrical power at the wall (this is intended to notify the vehicle owner when there is a power outage, a tripped circuit breaker, or any other condition that prevents the vehicle from being charged). By distinguishing between possible theft situations and simple power loss situations, the method can perform or issue an alert that is better tailored to the particular conditions that triggered it.

Claims

1. A method for monitoring a power coupler for a plug-in electric vehicle, comprising the steps of:

(a) determining if the plug-in electric vehicle is receiving electrical power from an external power source over the power coupler;

(b) determining if the power coupler is connected to the plug-in electric vehicle; and

(c) performing a first alert in response to the power coupler not being connected to the plug-in electric vehicle, and performing a second alert in response to the plug-in electric vehicle not receiving electrical power from the external power source even though the power coupler is connected to the plug-in electric vehicle, wherein the first and second alerts are different from one another and are at least partially implemented by a control module located on the plug-in electric vehicle.

2. The method of claim 1, wherein step (a) further comprises determining if the plug-in electric vehicle is receiving electrical power from an external power source by using the power coupler itself to sense the presence of electrical power and sending a corresponding signal from the power coupler to a control module.

3. The method of claim 1, wherein step (a) further comprises determining if the plug-in electric vehicle is receiving electrical power from an external power source by using a battery charger or a battery unit to sense the presence of electrical power and sending a corresponding signal from the battery charger or the battery unit to a control module.

4. The method of claim 1, wherein step (b) further comprises determining if the power coupler is connected to the plug-in electric vehicle by using a proximity circuit to evaluate the connection.

5. The method of claim 1, further comprising the step of:

waiting for a delay sequence following steps (a) and (b), and again determining if the power coupler is connected to the plug-in electric vehicle before proceeding to step (c).

6. The method of claim 1, further comprising the step of:

determining if a theft deterrent system is armed before proceeding to step (c), and if the theft deterrent system is not armed then bypassing the first alert, and if the theft deterrent system is armed then performing the first alert.

7. The method of claim 1, wherein step (c) further comprises performing a first alert by sending a signal from a control module to a theft deterrent system that causes the theft deterrent system to perform at least one of the following actions:

emit an audible sound and/or flash the vehicle lights.

8. The method of claim 1, wherein step (c) further comprises performing a first alert by sending a signal from a control module to a notification system that causes the notification system to send at least one wireless communication to a pre-established destination.

9. The method of claim 1, further comprising the step of:

waiting for a delay sequence following steps (a) and (b), and again determining if the plug-in electric vehicle is receiving electrical power from an external power source over a power coupler before proceeding to step (c).

10. The method of claim 1, wherein step (c) further comprises performing a second alert by sending a signal from a control module to a theft deterrent system that causes the system to perform at least one of the following actions:

emit an audible sound and/or flash the vehicle lights.

11. The method of claim 1, wherein step (c) further comprises performing a second alert by sending a signal from a control module to a notification system that causes the system to send at least one wireless communication to a pre-established destination.

12. The method of claim 1, wherein step (c) further comprises performing a first alert that is a theft alert with a first audible alarm and performing a second alert that is a power loss alert with a second audible alarm, and the first audible alarm is louder than the second audible alarm.

13. The method of claim 1, wherein a vehicle owner customizes the first and/or second alert by establishing a destination for one or more wireless communications.

14. The method of claim 1, further comprising the step of:

maintaining a control module in an “

on”

state following step (c), and again determining if the power coupler is connected to the plug-in electric vehicle.

15. A method for monitoring a power coupler for a plug-in electric vehicle, comprising the steps of:

(a) determining if the plug-in electric vehicle is receiving electrical power from an external power source over the power coupler;

(b) determining if the power coupler is connected to the plug-in electric vehicle;

(c) determining if a theft deterrent system is armed;

(d) issuing a theft alert with the theft deterrent system located on the vehicle by emitting an audible sound or flashing the vehicle lights in order to dissuade someone from stealing the power coupler when it is determined that the power coupler is not connected to the plug-in electric vehicle and the theft deterrent system is armed; and

(e) issuing a power loss alert with a notification system located on the vehicle by sending one or more wireless messages in order to notify a vehicle owner of a power interruption when it is determined that the plug-in electric vehicle is not receiving electrical power from the external power source but the power coupler is connected to the plug-in electric vehicle.