Battery control system and method

• US 8,030,881 B2
• Filed: 01/22/2008
• Issued: 10/04/2011
• Est. Priority Date: 01/22/2008
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Fujiwara, Tadashi, Scheufler, Nick, Okama, Toshihiro, Owens, C. Richard Jr., Sgueglia, John
• Primary Examiner(s): Tso; Edward
• Assistant Examiner(s): Berhanu; Samuel
• Application Number:
  US12/017,891
• Publication Number:
  US 20090184686A1
• Time in Patent Office: 1,351 Days
• Field of Search: 320/104, 307/9.1, 307/10.1, 180/277
• US Class Current: 320/104
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/1438 in combination with power supplies for loads other than batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A battery control system and method for a battery of a vehicle includes a battery for supplying electrical power to a plurality of loads of the vehicle and a controller that receives a battery signal representative of a condition of the battery, an ignition key signal representative of a state of an ignition key of the vehicle, and an engine signal representative of a state of an engine in the vehicle. The controller selectively electrically connects/disconnects the plurality of loads of the vehicle and the battery based on at least one of the battery signal, the ignition key signal, and the engine signal. An interface provides information on at least one of the battery and a connection state between the plurality of loads and the battery.

Claims

1. A battery control system for a vehicle, comprising:

a battery for supplying electrical power in the vehicle;

a controller receiving a battery signal representative of a condition of said battery, an ignition key signal representative of a state of an ignition key of the vehicle, and an engine signal representative of a state of an internal combustion engine in the vehicle;

a plurality of loads selectively electrically connected to said battery by said controller in response to at least one of said battery signal, said ignition key signal and said engine signal; and

an interface providing information on at least one of said battery and a connection state between said plurality of loads and said battery,

wherein said controller electrically disconnects at least one load of said plurality of loads from said battery when said controller receives (i) said ignition key signal indicating that said ignition key is not in an ON position and (ii) said battery signal indicating that said condition of said battery is below a first predetermined threshold.

2. The battery control system of claim 1 wherein said at least one load of said plurality of loads includes a first load, and wherein said controller electrically disconnects a second load of said plurality of loads from said battery when (i) said ignition key signal indicates that said ignition key is not in said ON position and (ii) said battery signal indicates that said condition of said battery is below a second predetermined threshold, said second predetermined threshold being lower than said first predetermined threshold.

3. The battery control system of claim 2 wherein said first load is interior lighting within the vehicle and said second load is backup functions of the vehicle.

4. The battery control system of claim 2 wherein said controller commands said interface to provide a first message when said first load is electrically disconnected from said battery and commands said interface to provide a second message when said second load is electrically disconnected from said battery, said first message indicating that said first load has been disconnected from said battery and said second message indicating that said second load has been disconnected from said battery.

5. The battery control system of claim 1 further including a sensor electrically connected to said battery for sensing said condition of said battery and generating said battery signal to send to said controller.

6. The battery control system of claim 1 wherein said controller commands said interface to provide a message when (i) said ignition key signal indicates that said ignition key is in an ON position, (ii) said engine signal indicates that said engine is off, and (iii) said battery signal indicates that said condition of said battery is below a predetermined threshold, said message indicating that said condition of said battery is below said predetermined threshold.

7. The battery control system of claim 1 wherein said at least one load of said plurality of loads a first load, wherein said controller electrically disconnects the first load from said battery when (i) said ignition key signal indicates that said ignition key is in an ON position, (ii) said engine signal indicates that said engine is on, and (iii) said battery signal indicates that said condition of said battery is below the first predetermined threshold, and wherein said controller electrically disconnects a second load of said plurality of loads from said battery when (i) said ignition key signal indicates that said ignition key is in said ON position (ii) said engine signal indicates that said engine is on, and (iii) said battery signal indicates that said condition of said battery is below a second predetermined threshold that is lower than said first predetermined threshold.

8. The battery control system of claim 1 wherein said controller progressively disconnects each of said plurality of loads when (i) said ignition key signal indicates that said ignition key is in an ON position, (ii) said engine signal indicates that said engine is on, and (iii) said battery signal indicates that said condition of said battery is below a predetermined threshold that corresponds specifically to each of said plurality of loads.

9. The battery control system of claim 8 wherein said controller progressively reconnects each of said plurality of loads after being disconnected when (i) said ignition key signal indicates that said ignition key is in an ON position, (ii) said engine signal indicates that said engine is on, and (iii) said battery signal indicates that said condition of said battery is above said predetermined threshold that corresponds specifically to each of said plurality of loads.

10. The battery control system of claim 8 wherein said predetermined threshold corresponding to each of said plurality of loads is prioritized based on at least one of customer importance and energy or power consumption.

11. A battery control method for a battery of a vehicle that provides electrical power to a plurality of loads of the vehicle, comprising:

receiving a battery signal representative of a condition of the battery;

receiving an ignition key signal representative of a state of an ignition key of the vehicle;

receiving an engine signal representative of a state of an internal combustion engine of the vehicle;

selectively electrically connecting the plurality of loads of the vehicle to the battery based on at least one of said battery signal, said ignition key signal and said engine signal;

providing information on at least one of the battery and a connection state between at least one of the plurality of loads and the battery; and

electrically disconnecting at least one load of said plurality of loads from the battery when said ignition key signal indicates that said ignition key is in an OFF position and said battery signal indicates said condition of the battery is below a first predetermined threshold.

12. The battery control method of claim 11 wherein the plurality of loads of the vehicle are selectively electrically connected to the battery based on said battery signal, said ignition key signal and said engine signal.

13. The battery control method of claim 11 further comprising:

electrically disconnecting a second load of the plurality of loads from the battery when said ignition key signal indicates that said ignition key is in said OFF position and said battery signal indicates said condition of the battery is below a second predetermined threshold.

14. The battery control method of claim 13 wherein providing information includes:

displaying a first message indicating that said first load has been disconnected from the battery when said first load is electrically disconnected from the battery; and

displaying a second message indicating that said second load has been disconnected from the battery when said second load is electrically disconnected from the battery.

15. The battery control method of claim 11 wherein providing information includes providing a message indicating that said condition of the battery is below a predetermined threshold when said ignition key signal indicates that said ignition key is in an ON position, said engine signal indicates that the engine is off, and said battery signal indicates that said condition of the battery is below said predetermined threshold.

16. The battery control method of claim 11 wherein selectively electrically connecting the plurality of loads includes progressively electrically disconnecting each of the plurality of loads when said ignition key signal indicates that said ignition key is in an ON position, said engine signal indicates that said engine is on, and said battery signal indicates that that said condition of said battery is below a predetermined threshold that corresponds specifically to each of the plurality of loads.

17. The battery control method of claim 16 wherein progressively electrically disconnecting each of the plurality of loads includes prioritizing each of the loads based on at least one of regulations, customer importance, energy consumption and power consumption.

18. A control system for a battery in a vehicle, comprising:

a battery for supplying electrical power in the vehicle;

a controller receiving a battery signal representative of a condition of said battery, an ignition key signal representative of a state of an ignition key of the vehicle, and an engine signal representative of a state of an engine in the vehicle;

a plurality of loads selectively electrically disconnected from said battery by said controller in response to said battery signal, said ignition key signal and said engine signal, said controller electrically disconnecting a load A1 of said plurality of loads when said ignition key signal indicates that said ignition key is not in an ON position and said battery signal indicates said condition of said battery is below a threshold A1 and said controller electrically disconnecting a load A1+N of said plurality of loads from said battery when said ignition key signal indicates that said ignition key is not in said ON position and said battery signal indicates that said condition of said battery is below a threshold A1+N, said threshold A1+N being lower than said threshold A1; and

an interface providing a message A1 when said load A1 is electrically disconnected from said battery and providing a message A1+N when said load A1+N is electrically disconnected from said battery,

wherein N is an integer.

19. The control system of claim 18 wherein said interface provides a message B1 when said ignition key signal indicates that said ignition key is in an ON position, said engine signal indicates that said engine is off, and said battery signal indicates that said condition of said battery is below a threshold B1.

20. The control system of claim 19 wherein said controller electrically disconnects a load C1 when said ignition key signal indicates that said ignition key is in an ON position, said engine signal indicates that said engine is on, and said battery signal indicates that that said condition of said battery is below a threshold C1, and said controller electrically disconnects a load C1+N when said ignition key signal indicates that said ignition key is in an ON position, said engine signal indicates that said engine is on, and said battery signal indicates that that said condition of said battery is below a threshold C1+N, said threshold C1+N being lower than said threshold C1.