Method and system for internally jump-starting an engine

• US 8,319,472 B2
• Filed: 01/19/2009
• Issued: 11/27/2012
• Est. Priority Date: 01/19/2009
• 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., Sienkiewicz, Carlene M., Wilson, Daryl A., Klemmer, Matthew J.
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): HERNANDEZ, MANUEL J
• Application Number:
  US12/355,886
• Publication Number:
  US 20100181959A1
• Time in Patent Office: 1,408 Days
• Field of Search: 320/103, 320/104, 701/22, 180/65.1, 307/10.6
• US Class Current: 320/103
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: F02N 11/0866 comprising several power sources, e.g. battery and capacitor or two batteries
• CPC Class Codes: H02J 1/122 Provisions for temporary connection of DC sources of essentially the same voltage, e.g. jumpstart cables
• CPC Class Codes: H02J 7/1423 with multiple batteries
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

Methods and apparatus are provided for performing a jump-start without the use of external equipment. The apparatus comprises a first battery electrically coupled to a starter motor for an engine, the first battery providing power to start the engine; a second battery; a power converter electrically coupled to the first battery and electrically coupled to the second battery; and a controller communicatively coupled to the power converter. The controller may be configured to determine a low battery condition of the first battery such that the first battery has insufficient power to start the engine, and when the low battery condition occurs, to direct the power converter to supply power from the second battery to the first battery to thereby allow the engine to be started.

Claims

1. A method of starting a vehicle, wherein the vehicle comprises a first battery coupled to an engine, a second battery, a power converter coupled between the first battery and the second battery, and a vehicle user display, the method comprising:

determining a low battery condition of the first battery;

if the low battery condition is determined,

activating the power converter with the engine off to charge the first battery from the second battery, subject to a limiting of the activating based at least in part on a number of times that the engine is started successfully and a number of times that the first battery is charged using the second battery; and

directing starting of the engine.

2. The method of starting the vehicle according to claim 1 further comprising:

displaying a message on the vehicle user display prompting the operator to activate the power converter; and

receiving a start command from the operator prior to the activating the power converter.

3. The method of starting the vehicle according to claim 1 wherein the determining the low battery condition comprises detecting a failed attempt to start the engine.

4. The method of starting the vehicle according to claim 1 wherein the determining the low battery condition comprises sensing an electrical characteristic of the first battery.

5. The method of starting the vehicle according to claim 1 wherein the method further comprises determining if the second battery is in a state to supply power for starting the engine.

6. The method of starting the vehicle according to claim 1 wherein the activating is performed for a first time period to charge the first battery from the second battery during the first time period.

7. The method of starting the vehicle according to claim 6 further comprising displaying a message on the vehicle user display during the first time period directing the operator to wait before attempting to start the engine.

8. The method of starting the vehicle according to claim 7 further comprising displaying a message on the vehicle user display directing the operator to attempt to start the engine during a second time period after the first time period.

9. The method of starting the vehicle according to claim 8 wherein the activating is performed during the second time period to supply power for starting the engine during the second time period.

10. The method of starting the vehicle according to claim 1 further comprising limiting the activating of the power converter with the engine off to a predetermined number of activations.

11. The method of starting the vehicle according to claim 10 wherein the vehicle further comprises a controller comprising a first counter and a second counter, and wherein the limiting of the activating of the power converter with the engine off comprises:

incrementing the first counter each time the engine is successfully started using the first battery to thereby store a first value in the first counter equal to the number of times the engine is successfully started using the first battery;

incrementing the second counter each time the activating of the power converter with the engine off is performed to thereby store a second value in the second counter equal to the number of times the first battery is charged using the second battery;

resetting the first counter to zero each time the activating of the first battery is charged using the second battery;

resetting the second counter to zero when the first value in the first counter is equal to a predetermined reset number; and

comparing the second value in the second counter to the predetermined number of activations.

12. A vehicle comprising:

a first battery electrically coupled to a starter motor for an engine, the first battery providing power to start the engine;

a second battery;

a power converter electrically coupled to the first battery and electrically coupled to the second battery; and

a controller communicatively coupled to the power converter, the controller configured to determine a low battery condition of the first battery such that the first battery has insufficient power to start the engine, and when the low battery condition occurs, to direct the power converter to supply power from the second battery to the first battery to thereby allow the engine to be started, subject to a limiting of the directing of the power converter to supply power from the second battery to the first battery, the limiting based at least in part on a number of times that the engine is started successfully and a number of times that the first battery is charged using the second battery.

13. The vehicle according to claim 12 further comprising a user interface display communicatively coupled to the controller, wherein the controller is configured to display a message on the user interface display regarding an option to start the engine using power from the second electrical system.

14. The vehicle according to claim 12 further comprising:

an engine sensor communicatively coupled to the controller, the engine sensor configured to detect an engine state; and

an ignition switch communicatively coupled to the controller, the ignition switch having an ignition switch state;

wherein the controller receives an engine state signal from the engine sensor and an ignition state signal from the ignition switch, and determines the low battery condition of the first battery based on the engine state signal and the ignition state signal.

15. The vehicle according to claim 12 further comprising:

a propulsion motor configured to propel the vehicle, the second battery configured to supply power to the propulsion motor,

a battery sensor communicatively coupled to the controller, the battery sensor configured to measure an electrical characteristic of the second battery,

wherein the controller receives a battery state signal from the battery sensor related to the electrical characteristic of the second battery, and wherein the controller includes a stored reference value, and compares the stored reference value to the battery state signal to determine if the second battery is in a state to supply power for starting the engine.

16. The vehicle of claim 12, wherein the controller is further configured to:

increment a first counter each time the engine is successfully started using the first battery to thereby store a first value in the first counter equal to a number of times the engine is successfully started using the first battery;

increment a second counter each time the activating of the power converter with the engine off is performed to thereby store a second value in the second counter equal to a number of times the first battery is charged using the second battery;

reset the first counter to zero each time the activating of the first battery is charged using the second battery;

reset the second counter to zero when the first value in the first counter is equal to a predetermined reset number; and

compare the second value in the second counter to the predetermined number of activations.

17. A control system for a vehicle, wherein the vehicle comprises an engine electrically coupled to a first electrical system with a first battery, a second electrical system with a second battery, and a power converter coupled between the first electrical system and the second electrical system, the control system communicatively coupled to the power converter, the control system comprising:

an engine sensor configured to detect a state of the engine and to transmit an engine state signal related to the state of the engine;

a battery sensor configured to measure electrical characteristics related to the second battery and to transmit a battery state signal related to a state of the second battery;

a control module communicatively coupled to the engine sensor, the battery sensor, and to the power converter, the control module configured to receive the engine state signal and the battery state signal, wherein the control module is configured to use the engine state signal to determine when an attempt to start the engine using the first battery is likely to fail and to use the battery state signal to determine when the second battery is in a state to supply power for starting the engine, and wherein the control module is further configured to direct the power converter to supply power from the second battery to the first battery when the attempt to start the engine using the first battery is likely to fail and when the second battery is in the state to supply power for starting the engine, subject to a limiting of the directing of the power converter to supply power from the second battery to the first battery, the limiting based at least in part on a number of times that the engine is started successfully and a number of times that the first battery is charged using the second battery.

18. The control system according to claim 17, wherein the control module is configured to limit the activating of the power converter to a predetermined number of activations.

19. The control system according to claim 17 wherein the control system further comprises:

a user display communicatively coupled to the control module; and

a user input device communicatively coupled to the control module;

wherein the control module directs a user to initiate the supplying of power from the second electrical system to the first electrical system after determining that the attempt to start the engine using the first battery is likely to fail, and wherein the control module is configured to receive a user input from the user input device prior to the supplying of power from the second electrical system to the first electrical system for starting the engine.

20. The control system of claim 17, wherein the control module is further configured to:

increment a first counter each time the engine is successfully started using the first battery to thereby store a first value in the first counter equal to a number of times the engine is successfully started using the first battery;

increment a second counter each time the activating of the power converter with the engine off is performed to thereby store a second value in the second counter equal to a number of times the first battery is charged using the second battery;

reset the first counter to zero each time the activating of the first battery is charged using the second battery;

reset the second counter to zero when the first value in the first counter is equal to a predetermined reset number; and

compare the second value in the second counter to the predetermined number of activations.