Charge port authorization for electric vehicles

1. A method for wirelessly authorizing access to a charge port of an electrified vehicle comprising:

establishing a wireless communication link with a charging cord, the charging cord being external to the electrified vehicle;

receiving, from the charging cord, a wireless signal including a charging cord identifier;

verifying the charging cord is authorized for use with the electrified vehicle based on the charging cord identifier; and

opening a charge port door on the electrified vehicle in response to the charging cord identifier received from the charging cord being associated with an authorized charging cord.

2. The method of claim 1 , wherein establishing a wireless communication link with a charging cord comprises:

transmitting, from the vehicle, a polling signal; and

receiving, at the vehicle, a response signal from the charging cord in response to the polling signal.

3. The method of claim 2 , wherein the polling signal is a low-frequency (LF) polling signal and the response signal is an ultra high-frequency (UHF) response signal.

4. The method of claim 2 , wherein the polling signal used for authorizing access to the charge port is the same as a polling signal used for a passive entry system.

5. The method of claim 2 , wherein the response signal and wireless signal including the charging cord identifier is part of a same signal transmission.

6. The method of claim 1 , wherein the wireless signal, including the charging cord identifier, includes specific instructions instructing the vehicle to open a charge port door.

7. The method of claim 1 , wherein establishing a wireless communication link with a charging cord comprises:

receiving, at the vehicle, a polling signal from the charging cord; and

transmitting, from the vehicle, a response signal to the charging cord in response to the polling signal.

8. The method of claim 7 , further comprising:

measuring the signal strength of the polling signal, wherein the response signal is sent in response to the signal strength exceeding a predetermined signal strength level.

9. The method of claim 1 , wherein establishing a wireless communication link with a charging cord comprises:

detecting, using a coil antenna and a transponder in the charge port, a magnetic field from a charging cord handle having a transponder basestation.

10. The method of claim 9 , wherein opening the charge port door in response to the charging cord identifier being associated with an authorized charging cord occurs after the wireless communication link is broken signifying that the charging cord handle has been moved away from the charge port.

11. The method of claim 1 , wherein establishing a wireless communication link with a charging cord comprises transmitting a continuous wave signal to the charging cord, wherein the wireless signal received from the charging cord is received by monitoring a modulation of the continuous wave signal by a transponder in the charging cord.

12. The method of claim 1 , wherein establishing a wireless communication link with a charging cord comprises:

generating a magnetic field using a transponder basestation in the charge port; and connecting to a charging cord handle having a transponder when the charging cord handle is range of the transponder basestation.

13. A charge port authorization system for a vehicle comprising: a low-frequency (LF) transmitter configured to broadcast an LF signal;

an ultra-high-frequency (UHF) transceiver configured to receive a UHF signal from a charging cord handle, the UHF signal including a charging cord identifier; and

a controller configured to verify the charging cord is authorized for use with the vehicle to provide access to a charge port based on the charging cord identifier and transmit a signal to a charge port module instructing the charge port module to open a charge port door in response to the charging cord identifier being associated with an authorized charging cord.

14. The system of claim 13 , wherein the LF signal is a polling signal.

15. The system of claim 14 , wherein the UHF signal is a response signal configured to be received in response to the polling signal.

16. The system of claim 14 , wherein the polling signal used for authorizing access to the charge port is the same as a polling signal used for a passive entry system.

17. A charge port authorization system for a vehicle comprising: a charge port including a charge port door, a coil antenna, and a transponder; and

a controller configured to establish a wireless communication link with a charging cord handle having a transponder basestation when the charging cord handle is near the charge port, the controller being further configured to transmit a signal to a charge port module instructing the charge port module to open the charge port door after the wireless communication link is established.

18. The system of claim 17 , wherein the controller is configured to transmit the signal to the charge port module instructing the charge port module to open the charge port door when the wireless communication link is broken.

19. The system of claim 17 , wherein the controller is further configured receive a charging cord identifier from the transponder basestation in the charging cord handle and transmit the signal to the charge port module instructing the charge port module to open the charge port door in response to the charging cord identifier being associated with an authorized charging cord.

20. The system of claim 17 , wherein the controller is configured to establish a communication link upon detecting, using the coil antenna and the transponder in the charge port, a magnetic field from the charging cord handle having the transponder basestation.