On-board and wireless vehicle charging systems with shared components

• US 10,427,532 B2
• Filed: 04/05/2017
• Issued: 10/01/2019
• Est. Priority Date: 04/05/2017
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Elshaer, Mohamed, Chen, Chingchi, Ferrel, Mark J., Gibeau, John Paul
• Primary Examiner(s): Williams, Arun C
• Application Number:
  US15/479,687
• Publication Number:
  US 20180290545A1
• Time in Patent Office: 909 Days
• Field of Search: 320108
• CPC Class Codes: B60L 1/00 Supplying electric power to auxiliary equipment of vehicles circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: H02M 3/335 using semiconductor devices only
• 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 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A vehicle includes a traction battery, an on-board charging system (OBCS), and a wireless power transfer system (WPTS). Each of the OBCS and WPTS is configured to selectively use a same rectifier such that the rectifier rectifies output of the OBCS and rectifies output of the WPTS to provide power to the traction battery.

Claims

1. A vehicle comprising:

a low voltage battery;

a traction battery; and

an on-board charging system (OBCS) and a wireless power transfer system (WPTS) each configured to selectively use a same synchronous rectifier such that the synchronous rectifier rectifies output of the OBCS and rectifies output of the WPTS to provide power to the traction battery, wherein the synchronous rectifier is configured to transfer power from the low voltage battery to the traction battery.

2. The vehicle of claim 1, wherein the OBCS and WPTS include switches configured to selectively isolate the OBCS from the WPTS and traction battery.

3. The vehicle of claim 2 further comprising a controller configured to, responsive to a request to charge the traction battery via the WPTS, close a first of the switches associated with the WPTS and open a second of the switches associated with the OBCS.

4. The vehicle of claim 1, wherein the OBCS and WPTS include switches configured to selectively isolate the WPTS from the OBCS and traction battery.

5. The vehicle of claim 4 further comprising a controller configured to, responsive to a request to charge the traction battery via the OBCS, close a first of the switches associated with the OBCS, and open a second of the switches associated with the WPTS.

6. The vehicle of claim 1, wherein the OBCS includes the rectifier.

7. A method for charging a vehicle, comprising:

by a controller,

responsive to a request to charge a traction battery of the vehicle via an on-board charging system (OBCS), utilizing a synchronous rectifier to rectify output of the OBCS to provide power to the traction battery,

responsive to a request to charge the traction battery via a wireless power transfer system (WPTS), utilizing the synchronous rectifier to rectify output of the WPTS to provide power to the traction battery, and

responsive to a request to charge the traction battery via a low voltage battery, utilizing the synchronous rectifier to transfer output of the low voltage battery to the traction battery.

8. The method of claim 7 further comprising, responsive to the request to charge the battery via the OBCS, operating switches to isolate the WPTS from the OBCS and the battery.

9. The method of claim 7 further comprising, responsive to the request to charge the battery via the WPTS, operating switches to isolate the OBCS from the WPTS and the battery.

10. The method of claim 7, wherein the OBCS includes the rectifier.

11. A vehicle comprising:

a low voltage battery;

a traction battery;

a high voltage to low voltage DC-DC converter including an inverter; and

an on-board charging system (OBCS) and a wireless power transfer system (WPTS) each configured to selectively use the inverter such that the inverter rectifies output of the OBCS and rectifies output of the WPTS to provide power to the traction battery, wherein the inverter is configured to transfer power from the low voltage battery to the traction battery.

12. The vehicle of claim 11 further including switches configured to selectively isolate the OBCS from the WPTS and traction battery.

13. The vehicle of claim 12 further comprising a controller configured to, responsive to a request to charge the traction battery via the WPTS, open a first of the switches associated with the high voltage to low voltage DC-DC converter to isolate components thereof other than the inverter from the WPTS and traction battery.

14. The vehicle of claim 13, wherein the controller is further configured to, responsive to the request, open another of the switches to isolate the OBCS from the WPTS and traction battery.

15. The vehicle of claim 11 further including switches configured to selectively isolate the WPTS from the OBCS and traction battery.

16. The vehicle of claim 15 further comprising a controller configured to, responsive to a request to charge the traction battery via the OBCS, open a first of the switches associated with the high voltage to low voltage DC-DC converter to isolate components thereof other than the inverter from the OBCS and traction battery.

17. The vehicle of claim 16, wherein the controller is further configured to, responsive to the request, open another of the switches to isolate the WPTS from the OBCS and traction battery.