Optimum charging for electric-based vehicle

• US 9,306,412 B2
• Filed: 03/30/2012
• Issued: 04/05/2016
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yokoyama, Akihisa, Kumita, Kunihiko
• Primary Examiner(s): Berhanu, Samuel
• Application Number:
  US13/436,561
• Publication Number:
  US 20130257387A1
• Time in Patent Office: 1,467 Days
• Field of Search: 320/132, 320/104, 320/109
• US Class Current: 1/1
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/00716 in response to integrated charge or discharge current
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A system and method for controlling charging for a vehicle is disclosed. The system comprises a statistical analyzer, an estimation module and a determination module. The statistical analyzer analyzes a set of data describing utility rate information and one or more behaviors of the vehicle. The estimation module estimates one or more tendency parameters based at least in part on the analyzing. The determination module determines a charging setting based at least in part on the one or more tendency parameters. The charging setting comprises one or more of a target charging battery state of charge (SoC), a charging start time and a charging end time.

Claims

1. A computer-implemented method for controlling charging for a vehicle, the method comprising:

receiving from the vehicle a record reflecting a driving routine of the vehicle over a period of time, the record including departure times of the vehicle and times of the vehicle spent in-home;

analyzing the departure times of the vehicle and the times of the vehicle spent in-home to determine one or more probabilities associated with the departure times and the times spent in-home;

estimating one or more tendency parameters based at least in part on the probabilities associated with the departure times and the times spent in-home, each of the one or more tendency parameters reflecting an estimation for a regular daily driving behavior of the vehicle; and

determining a charging setting based at least in part on the one or more tendency parameters, the charging setting comprising a target state of charge (SoC) for a battery.

2. The method of claim 1, wherein the vehicle is a plug-in hybrid vehicle.

3. The method of claim 1, wherein the record further includes one or more a mileage, a battery SoC, and an ignition on (IG-ON) time.

4. The method of claim 1, wherein the one or more tendency parameters include one or more of a regular daily departure time, a regular daily in-home time, and a daily needed battery SoC.

5. The method of claim 1, wherein the charging setting comprises one or more of an aggressive mode with a threshold, a medium mode with a threshold that is higher than the threshold of the aggressive mode, and a conservative mode with a threshold that is higher than the threshold of the medium mode.

6. The method of claim 5 further comprising controlling charging for the vehicle by comparing the threshold with utility rate information.

7. The method of claim 6, wherein the utility rate information describes an electric utility rate for a certain period of time.

8. The method of claim 1 further comprising:

providing the charging setting to a user of the vehicle; and

responsive to receiving a selection of the charging setting from the user, controlling charging for the vehicle based at least in part on the selection of the charging setting.

9. The method of claim 1 further comprising:

receiving a change of the charging setting from a user of the vehicle; and

controlling charging for the vehicle based at least in part on the change of the charging setting.

10. A system for controlling charging for a vehicle, the system comprising:

a communication module for receiving from the vehicle a record reflecting a driving routine of the vehicle over a period of time, the record including departure times of the vehicle and times of the vehicle spent in-home;

a statistical analyzer for analyzing the departure times of the vehicle and the times of the vehicle spent in-home to determine one or more probabilities associated with the departure times and the times spent in-home;

an estimation module communicatively coupled to the statistical analyzer, the estimation module estimating one or more tendency parameters based at least in part on the probabilities associated with the departure times and the times spent in-home, each of the one or more tendency parameters reflecting an estimation for a regular daily driving behavior of the vehicle; and

a determination module communicatively coupled to the estimation module, the determination module determining a charging setting based at least in part on the one or more tendency parameters, the charging setting comprising a target state of charge (SoC) for a battery.

11. The system of claim 10, wherein the vehicle is a plug-in hybrid vehicle.

12. The system of claim 10, wherein the record further includes one or more a mileage, a battery SoC, and an ignition on (IG-ON) time.

13. The system of claim 10, wherein the one or more tendency parameters include including one or more of a regular departure time, a regular in-home time, and a daily needed battery SoC.

14. The system of claim 10, wherein the charging setting comprises one or more of an aggressive mode with a threshold, a medium mode with a threshold that is higher than the threshold of the aggressive mode, and a conservative mode with a threshold that is higher than the threshold of the medium mode.

15. The system of claim 14, wherein the determination module controlling charging for the vehicle by comparing the threshold with utility rate information.

16. The system of claim 15, wherein the utility rate information describes an electric utility rate for a certain period of time.

17. The system of claim 10, wherein the determination module further providing the charging setting to a user of the vehicle and responsive to receiving a selection of the charging setting from the user, controlling charging for the vehicle based at least in part on the selection of the charging setting.

18. The system of claim 10, wherein the determination module further receiving a change of the charging setting from a user of the vehicle and controlling charging for the vehicle based at least in part on the change of the charging setting.

19. A computer program product comprising a non-transitory computer readable medium encoding instructions that, in response to execution by a computing device, cause the computing device to perform operations comprising:

receiving from the vehicle a record reflecting a driving routine of the vehicle over a period of time, the record including departure times of the vehicle and times of the vehicle spent in-home;

analyzing the departure times of the vehicle and the times of the vehicle spent in-home to determine one or more probabilities associated with the departure times and the times spent in-home;

estimating one or more tendency parameters based at least in part on the probabilities associated with the departure times and the times spent in-home, each of the one or more tendency parameters reflecting an estimation for a regular daily driving behavior of the vehicle; and

determining a charging setting based at least in part on the one or more tendency parameters, the charging setting comprising of target state of charge (SoC) for a battery.

20. The computer program product of claim 19, wherein the vehicle is a plug-in hybrid vehicle.

21. The computer program product of claim 19, wherein the record further include one or more of a mileage, a battery SoC, and an ignition on (IG-ON) time.

22. The computer program product of claim 19, wherein the one or more tendency parameters includes one or more of a regular departure time, a regular in-home time, and a daily needed battery SoC.

23. The computer program product of claim 19, wherein the charging setting comprises one or more of an aggressive mode with a threshold, a medium mode with a threshold that is higher than the threshold of the aggressive mode, and a conservative mode with a threshold that is higher than the threshold of the medium mode.

24. The computer program product of claim 23, wherein instructions encoded in the computer readable medium when executed cause the computing device to perform operations further comprising:

controlling charging for the vehicle by comparing the threshold with utility rate information.

25. The computer program product of claim 24, wherein the utility rate information describes an electric utility rate for a certain period of time.

26. The computer program product of claim 19, wherein instructions encoded in the computer readable medium when executed cause the computing device to perform operations further comprising:

providing the charging setting to a user of the vehicle; and

responsive to receiving a selection of the charging setting from the user, controlling charging for the vehicle based at least in part on the selection of the charging setting.

27. The computer program product of claim 19, wherein instructions encoded in the computer readable medium when executed cause the computing device to perform operations further comprising:

receiving a change of the charging setting from a user of the vehicle; and

controlling charging for the vehicle based at least in part on the change of the charging setting.