Jump start and reverse battery protection circuit

• US 6,803,743 B2
• Filed: 10/04/2002
• Issued: 10/12/2004
• Est. Priority Date: 10/04/2002
• Status: Expired due to Term

• Current Assignee: Aptiv Technologies Limited (Aptiv PLC)
• Original Assignee: Delphi Technologies, Inc. (Aptiv PLC)
• Inventors: George, Terry A., Caputo, John V
• Primary Examiner(s): Tibbits, Pia
• Application Number:
  US10/264,932
• Publication Number:
  US 20040066168A1
• Time in Patent Office: 739 Days
• Field of Search: 320/104, 320/105, 320/118, 320/121, 320/135, 320/134, 320/136, 361/18, 361/84, 361/85, 361/93.8, 361/93.9, 361/103, 361/104, 307/9.1, 307/10.1, 307/10.7, 307/10.8, 307/127, 307/130, 323/276, 323/281
• US Class Current: 320/105
• CPC Class Codes: H02J 7/0034 using reverse polarity correcting or protecting circuits mechanical means of polarity protection H02J7/0045

Abstract

A jump start protection circuit having a normally open switch and a resistor positioned in parallel intermediate to a battery and a jump start post. A controller manipulates the switch between an open position and closed position, the closed position connects the jump start post to the battery and the open position disconnects the jump start post from the battery. The controller measures voltages at the battery and jump start post and is capable of receiving one or more additional inputs. The controller closes the switch when acceptable jump start conditions are detected. The controller can open the switch or maintain the switch in an open position. The jump start circuit provides protection against attempts to charge a battery with incorrect polarity connections and attempts to charge a battery from a potentially hazardous higher voltage power source.

Claims

1. A jump start circuit for electrical connection between a DC power source and a jump start post, said jump start circuit comprising:

a switch configured to be coupled between said DC power source and said jump start past, said switch having a closed state and an open state;

a resistive element coupled between said DC power source and said jump start post, said resistive element being positioned in parallel with said switch to enable said DC power source to supply a voltage to said jump start past; and

a microprocessor being capable of receiving a signal, being capable of measuring voltage at said DC power source and said jump start post, and being further capable of processing the voltage measurement, wherein said microprocessor commanding said switch to close based on a detection of a first predetermined condition, and commanding said switch to open based on a detection of a second predetermined condition, wherein said first predetermined condition comprises a result of processing the voltage measurements falling within an allowable range of values, and wherein said second predetermined condition is selected from a group consisting of;

a result of processing the voltage measurements falling outside an allowable range of values,

a voltage at said jump start post exceeding a predefined range for a predefined period of time,

a signal indicating a movement of a vehicle,

a signal indicating an automatic transmission selector being placed into reverse or drive gear, and

a signal indicating a manual transmission being placed into gear.

2. The jump start circuit as claimed in claim 1, wherein said switch is an electromechanical device.

3. The jump start circuit as claimed in claim 1, wherein said microprocessor is a microcontroller.

4. The jump start circuit as claimed in claim 1, wherein said resistive element comprises a resistor.

5. The jump start circuit as claimed in claim 1 wherein said first predetermined condition comprises at least one of the voltage at said DC power source and said voltage at said jump start post being within a predefined range for a predefined period of time.

6. The jump start circuit as claimed in claim 1, wherein mid second predetermined condition comprises at least one of the voltage at said DC power source and the voltage at said jump start post exceeding a threshold value for a predefined period of time.

7. The jump start circuit as claimed in claim 1, wherein said microprocessor being capable of receiving at least one input.

8. The jump start circuit as claimed in claim 7, wherein said second predetermined condition comprises a predetermined signal.

9. The jump start circuit am claimed in claim 7, wherein said second predetermined condition comprises a signal commanding said switch to open.

10. The jump start circuit for electrical connection between a DC power source and a jump start post, said jump start circuit comprising:

a switch configured to be coupled between said DC power source and said jump start post, said switch having a closed state and an open state;

a resistive element coupled between said DC power source and said jump start post, said resistive element being positioned in parallel with said switch;

means to monitor the voltage of said DC power source and said jump start post;

means to process the voltage measurements;

means to close said switch based on detection at a first predetermined condition according to the voltage measurements; and

means to open said switch based on detection of a second predetermined condition, according to the voltage measurements.

11. The jump start circuits claimed in claim 10, wherein said means to open and close said switch comprises a controller.

12. The jump start circuit as claimed in claim 10, wherein said first predetermined condition comprises at least one of said voltage at said DC power source and said voltage at said jump start post being within a predefined range for a predefined period of time.

13. The jump start circuit as claimed in claim 10, wherein said second predetermined condition comprises at least one of said voltage at said DC power source and said voltage at said jump start post exceeding a threshold value for a predefined period of time.

14. The jump start circuit as claimed in claim 10, wherein said jump start circuit having means to receive at least one input.

15. A DC power supply comprising:

a chargeable battery having positive and negative ends; and

a jump start circuit electrically connected between said positive end of said battery and a jump start post, said jump start circuit comprising;

a switch configured to be coupled between said DC power source and said jump start post, said switch having a closed state and an open state;

a resistive element coupled between said DC power source and said jump start post, said resistive element being positioned in parallel with said switch; and

a microprocessor measuring voltages at said DC power source and said jump start post and processing the voltage measurements, wherein said microprocessor commanding said switch to close based on detection of a first predetermined condition, and commanding said switch to open based on detection of a second predetermined condition.

16. A jump start circuit for electrical connection between a DC power source and a jump start post, said jump start circuit comprising:

a switch electrically connected between said DC power source and said jump start post, said switch having a closed position and an open position, said switch being biased to said normally open position;

a resistive element electrically connected between said DC power source and said jump start post, said resistive element being connected in parallel with said switch enabling said DC power source to provide voltage to said jump start post; and

a microprocessor configured to measure voltage at said DC power source and said jump start post, configured to process a first set of voltage measurements obtained from said DC power source and said jump start post, configured to command said switch to close based on detection of a first predetermined condition, configured to process a second set of voltage measurements obtained from said DC power source and said jump start post, and configured to command said switch to open based on detection of a second predetermined condition, wherein said first predetermined condition comprises a determination that a result obtained from processing said first set of voltage measurements satisfies predefined criteria.

17. The jump start circuit as claimed in claim 16, wherein said second predetermined condition comprises a determination that a result obtained from processing said second set of voltage measurements satisfies predefined criteria.

18. The jump start circuit as claimed in claim 16, wherein said microprocessor being further capable of receiving at least one input and said second predetermined condition comprises detection of a signal commanding said switch to open.