Isolated dual battery system

• US 20060201724A1
• Filed: 03/10/2005
• Published: 09/14/2006
• Est. Priority Date: 03/10/2005
• Status: Active Grant

• Current Assignee: Red Tech Incorporated
• Original Assignee: Red Tech Incorporated
• Inventors: Leblanc, Jean-Francois
• Granted Patent: US 7,362,005 B2
• Time in Patent Office: Days
• US Class Current: 180/65.100
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: F02N 11/0866 comprising several power sources, e.g. battery and capacitor or two batteries
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/34 Parallel operation in networks using both storage and other dc sources, e.g. providing buffering H02J7/14 takes precedence
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An isolated dual power source system for isolating a first power source of a vehicle, connected to an engine starter, from a second power source of the vehicle which has an electrical circuit for distributing electrical power among the consumers, includes first and second switches for selectively connecting the first and second power sources to the electrical circuit, respectively. The system may include a controller that independently and operatively connects to the first and second switches to control operation thereof for selective and respective isolation from the electrical circuit. A third switch connecting the second power source to the starter may be used to selectively provide power thereto and bypass the first power source to start the engine.

Claims

1. An isolated dual power source system for isolating a first power source of a vehicle, connected to a starting power consumer for starting an engine of the vehicle, from a second power source of the vehicle, the vehicle having consumers, including an electrical power generating means and an electrical circuit for distributing electrical power among the consumers, said system comprising:

a first switch for selectively connecting the first power source to the electrical circuit to provide power thereto when said first switch is closed; and

a second switch for selectively connecting the second power source to the electrical circuit to provide power thereto when said second switch is closed.

2. The system of claim 1, further including an electronic controller independently and operatively connecting to said first and second switches, whereby said electronic controller independently controls operation of both said first and second switches to selectively isolate respective said first and second power sources from the electrical circuit.

3. The system of claim 2, further including a power source sensor for measuring a first level of available electrical power from said first power source and a second level of available electrical power from said second power source, said power source sensor electrically connecting to said electronic controller, to which said first power level and said second power level are transmitted, and, selectively, to said first and said second power source.

4. The system of claim 2, further including a first power source sensor for measuring a first level of available electrical power from said first power source and a second power source sensor for measuring a second level of available electrical power from said second power source, said first and second power source sensors electrically connecting to said electronic controller, to which said first power level and said second power level are transmitted, and, respectively, to said first and second power sources.

5. The system of claim 4, wherein said electronic controller generates a warning for a user when said first power level is below a first predetermined power level required to provide sufficient electrical power to said starting power consumer for starting the engine.

6. The system of claim 5, wherein said electronic controller generates a warning for a user when said second power level is below a second predetermined power level required to provide sufficient electrical power to the consumers, including the electrical power generating means and the electrical circuit.

7. The system of claim 6, further including an engine sensor connecting to the engine and electrically connecting to said electronic controller for detecting when the engine is running.

8. The system of claim 7, wherein said engine sensor is an oil pressure sensor for detecting a pressure level of engine oil, said pressure level being larger than a predetermined pressure level when the engine is running.

9. The system of claim 7, wherein said electronic controller closes said first switch when the engine is running and said first power level is below a third predetermined power level required to indicate said first power source is at full electrical capacity, thereby allowing the electrical power generating means to recharge said first power source.

10. The system of claim 9, wherein said electronic controller opens said first switch when said first power level is larger or equal than said third predetermined power level, thereby indicating said first power source has been recharged at full electrical capacity.

11. The system of claim 7, wherein said electronic controller ensures that said first switch is opened when the engine is being turned off.

12. The system of claim 7, wherein said electronic controller generates a warning for a user and opens said second switch when the engine is running and said second power level remains below said second predetermined power level after being recharged by the electrical power generating means for a first predetermined amount of time, thereby indicating that the second power source needs to be replaced.

13. The system of claim 7, wherein, when said engine is not running and said second power level is below the second predetermined power level, said electronic controller generates a warning for a user to start the engine to allow recharge of the second power source.

14. The system of claim 13, wherein said electronic controller subsequently opens said second switch to disconnect the second power source from the electrical circuit until the engine is restarted.

15. The system of claim 1, wherein said first and second switches are generally opened and closed, respectively, during normal operation of the vehicle.

16. The system of claim 2, further including at least one sensor for sensing information about at least one of the vehicle and consumers thereof and a display connected to said electronic controller for visually displaying information collected by said at least one sensor.

17. The system of claim 2, further including a container for housing said electronic controller, said container being locatable in an interior area of the vehicle adjacent a driver seat thereof.

18. The system of claim 2, wherein said electronic controller is programmable by a user.

19. The system of claim 6, wherein said electronic controller includes a memory for selectively storing at least one of said first and second predetermined power levels therein.

20. The system of claim 1, further including a third switch for selectively connecting the second power source to the starting power consumer to provide power thereto when said third switch is closed, whereby the third switch allows the second power source to bypass the first power source so as to allow starting of the engine therewith.

21. The system of claim 20, further including an electronic controller independently and operatively connecting to said first, second and third switches, whereby said electronic controller independently controls operation of both said first and second switches to selectively isolate respective said first and second power sources from the electrical circuit and operation of said third switch to selectively connect said second power source from said starting power consumer.

22. The system of claim 21, further including a first power source sensor for measuring a first level of available electrical power from said first power source and a second power source sensor for measuring a second level of available electrical power from said second power source, said first and second power source sensors electrically connecting to said electronic controller, to which said first power level and said second power level are transmitted, and, respectively, to said first and second power sources.

23. The system of claim 22, wherein, before the engine is started, said electronic controller closes said third switch to allow said second power source to power said starting power consumer to allow starting the engine when said first power level is below a first predetermined power level required to provide sufficient electrical power to said starting power consumer for starting the engine.

24. The system of claim 20, wherein said first, second and third switches are generally opened, closed and opened, respectively, during normal operation of the vehicle.

25. A method for isolating a first power source of a vehicle, connected to a starting power consumer for starting an engine of the vehicle, from a second power source of the vehicle, the vehicle having consumers, including an electrical power generating means and an electrical circuit for distributing electrical power among the consumers, said method comprising:

connecting said first power source to the electrical circuit through a first switch; and

connecting said second power source to the electrical circuit through a second switch;

thereby allowing selective isolation of said first and second power sources from the electrical circuit through independent operative control of said first and second switches, respectively.

26. The method of claim 25, wherein the vehicle includes an electronic controller, said method further including:

connecting said first and second switches to the electronic controller for selective and independent control thereof by the controller.

27. The method of claim 25, further including:

connecting said second power source to the starting power consumer through a third switch;

thereby allowing the second power source to bypass the first power source so as to allow starting of the engine therewith when the first power source is below a predetermined power level required to provide sufficient electrical power to said starting power consumer for starting the engine.

28. The method of claim 27, wherein the vehicle includes an electronic controller, said method further including:

connecting said first, second and third switches to the electronic controller for selective and independent control thereof by the controller.