Systems, methods, and apparatus related to wireless charging management
View Patent ↗Various systems, methods, and apparatuses for operating a wireless charging device in an electric vehicle are disclosed. One method includes detecting a system fault indicative of one or more faults in the wireless charging device in the electric vehicle or in the transmitter. The method further includes determining a fault severity level from a plurality of fault severity levels based on a type of the system fault detected. A total number of types of system faults can be greater than a total number of the plurality of fault severity levels. The method further includes performing one or more system fault response operation based on the determined fault severity level. Each of the plurality of fault severity levels can be associated with a different set of system fault response operations.
1. A wireless charging device, comprising:
a wireless power transfer circuit; and
a processor configured to control a system operation of the wireless charging device, the processor configured to:
delay initiating wireless power transfer to an electric vehicle for a first period of time in response to receiving an indication to initiate the wireless power transfer to the electric vehicle,
ignore detection of one or more foreign objects during the first period of time,
delay initiating the wireless power transfer for a second period of time after the first period of time; and
initiate wireless power transfer after the second period of time in response to determining that no foreign object is detected as present during the second period of time.
2. The device of claim 1 , wherein the indication to initiate wireless power transfer is in response to receiving another indication to re-start power transfer after another foreign object was cleared.
3. The device of claim 1 , wherein the processor is further configured to:
receive a signal indicating that the foreign object is detected during the second period of time, and
interrupt the system operation in response to receiving the signal.
4. The device of claim 3 , wherein the signal is received from a foreign object detection circuit.
5. The device of claim 1 , wherein the indication comprises an input received from a user via a user input device.
6. The device of claim 1 , wherein the first period of time has a duration between 15 and 25 seconds or between 1 and 60 seconds.
7. The device of claim 1 , wherein the one or more foreign objects comprises a living object, wherein determining that no foreign object is detected as present includes determining that no living object is detected as present.
8. The device of claim 1 , wherein the wireless power transfer circuit comprises a coil comprising a conductive material and having at least one loop portion, the coil configured to:
couple to a magnetic field generated by a transmitter for the wireless power transfer; and
generate output power to power or charge a load.
9. The device of claim 1 , further comprising a foreign object detection circuit configured to:
detect the one or more foreign objects within a predetermined distance from the wireless power transfer circuit, the one or more foreign objects interfering with the wireless power transfer or not participating in the wireless power transfer.
10. A method of operating a wireless power transfer device, the method comprising:
receiving, at a point in time, an indication to initiate wireless power transfer for charging an electric vehicle;
delaying initiation of the wireless power transfer for a first period of time after the point in time,
ignoring detection of one or more foreign objects during the first period of time,
delaying initiation of the wireless power transfer for a second period of time after the first period of time; and
initiating wireless power transfer after the second period of time in response to determining that no foreign object is detected as present during the second period of time.
11. The method of claim 10 , wherein the indication to initiate wireless power transfer is received in response to receiving another indication to re-start power transfer after another foreign object is cleared.
12. The method of claim 10 , further comprising:
receiving a signal indicating that a foreign object is detected during the second period of time, and
interrupting a system operation in response to receiving the signal.
13. The method of claim 10 , wherein the indication comprises an input received from a user via a user input device.
14. The method of claim 10 , wherein the first period of time has a duration between 15 and 25 seconds or between 1 and 60 seconds.
15. The method of claim 10 , wherein ignoring detection of the one or more foreign objects comprises ignoring receipt of an input received from a foreign object detection circuit.
16. The method of claim 10 , wherein the one or more foreign objects comprises a living object, and wherein determining that no foreign object is detected as present includes determining no living object is detected as present.
17. A wireless power charging device, comprising:
means for receiving, at a point in time, an indication to initiate wireless power transfer for charging an electric vehicle;
means for delaying initiation of the wireless power transfer for a first period of time after the point in time,
means for ignoring detection of one or more foreign objects during the first period of time,
means for delaying initiation the wireless power transfer for a second period of time after the first period of time; and
means for initiating wireless power transfer after the second period of time in response to determining that no foreign object is detected as present during the second period of time.
18. The device of claim 17 , wherein the one or more foreign objects comprises a living object, and wherein determining that no foreign object is detected as present includes determining no living object is detected as present.