Power device for a vehicle

• US 7,982,332 B2
• Filed: 12/08/2006
• Issued: 07/19/2011
• Est. Priority Date: 12/08/2006
• Status: Active Grant

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Daimler AG (Mercedes-Benz Group AG), Chrysler Group LLC (Stellantis NV)
• Inventors: Nelson, Jody J., Nietfeld, Franz
• Primary Examiner(s): Fureman; Jared J
• Assistant Examiner(s): Parries; Dru M
• Application Number:
  US11/608,428
• Publication Number:
  US 20080136374A1
• Time in Patent Office: 1,684 Days
• Field of Search: 307/9.1, 307/10.1, 307/10.7
• US Class Current: 307/10.1
• CPC Class Codes: B60L 58/33 by cooling
• CPC Class Codes: B60L 58/40 for controlling a combination of batteries and fuel cells
• 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: H02J 2310/46 for ICE-powered road vehicles
• 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: H02P 2201/11 Buck converter, i.e. DC-DC step down converter decreasing the voltage between the supply and the inverter driving the motor general aspects of plural converters in cascade H02M
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 90/40 Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

A power device for use in a vehicle includes a housing, a voltage converter, and a charge-storing device. The housing carries the voltage converter and the charge-storing device. The voltage converter includes a circuit that converts a power signal having a first voltage level to a second voltage level. The charge-storing device electrically couples with the voltage converter and stores the power signal having the second voltage level.

Claims

1. A power device in combination with a vehicle electrical system comprised of a plurality of vehicle electronics and a power source electrically coupled with an electric machine of a vehicle to provide power to the electric machine, comprising:

a housing installed within the vehicle;

a voltage converter comprising an AC/DC converter and a DC/AC converter contained within the housing electrically coupled to the power source, wherein the voltage converter converts an electrical power signal having a first voltage greater than a voltage suitable for powering the plurality of vehicle electronics to electrical power having a second voltage lower than the first voltage and that is suitable for powering the plurality of vehicle electronics, and wherein the voltage converter is operable to reduce the voltage of the power signal from the first voltage to the second voltage, and is operable to convert a voltage from the charge-storing device from the second voltage to the first voltage;

a charge-storing device contained within the housing and electrically coupled with the voltage converter storing electrical charge from the electrical power at the second voltage and providing steady-state electrical power to the vehicle electrical system for powering the plurality of vehicle electronics;

wherein the power device and power source comprises a vehicle power system; and

wherein the housing encloses the voltage converter and the charge-storing device together within the housing, has a size or volume of a standard automotive battery, and is installed in the same space within the vehicle in which a standard automotive battery is installed.

2. The power device of claim 1, wherein the housing comprises a weather-tight seal that protects the voltage converter and charge-storing device, and further comprising a metal plate located on the bottom of the housing providing an electrical connection between the charge-storing device and vehicle ground.

3. The power device of claim 2, wherein the metal plate contacts a part of the vehicle chassis providing a heat sink therefor.

4. The power device of claim 1, wherein the first voltage is greater than twice the voltage of the second voltage.

5. The power device of claim 1, wherein the voltage converter further comprises a transformer.

6. The power device of claim 1, wherein the charge-storing device is operable to provide power to the electronics for at least several minutes.

7. The power device of claim 1, wherein the charge-storing device comprises a twelve volt or forty-two volt battery.

8. The power device of claim 1, wherein the charge-storing device comprises an ultra capacitor.

9. A power device in combination with vehicle electronics and a power source electrically coupled with an electric machine of a vehicle, comprising:

a housing installed within the vehicle;

a first connector carried by the housing and electrically coupling the power device to the power source;

a voltage converter within the housing and electrically coupled with the first connector, the voltage converter comprising an AC/DC converter and a DC/AC converter;

a charge-storing device within the housing and electrically coupled with the voltage converter for storing electrical charge with the charge-storing device capable of holding enough charge to provide steady state electrical power to the vehicle electronics for several minutes;

a second connector carried by the housing and electrically coupling the charge-storing device with the vehicle electronics;

a third connector carried by the housing and electrically coupled with the power device connecting the power device with a vehicle communications bus configured to enable monitoring of the power device, to enable the vehicle electronics to provide information to the power device, to enable a wakeup signal to be provided to the voltage converter, or to enable a control signal to be provided to the power device;

wherein the voltage converter receives an electrical power signal from the power source having a first voltage at the first connector, converts electrical power from the first voltage into electrical power having a second voltage, and provides electrical power at the second voltage to the charge-storing device; and

wherein the housing has a size or volume of a standard twelve volt automotive battery, encloses the voltage converter and charge-storing device together within the housing, and is installed in the same space within the vehicle in which a standard twelve volt automotive battery is installed.

10. The power device of claim 9, wherein the second connector comprises a pair of posts located on the exterior of the housing.

11. The power device of claim 9, wherein the second connector comprises a metal plate located on the exterior of the housing to provide an electrical connection to the charge-storing device.

12. The power device of claim 9, wherein the power signal is a DC voltage signal.

13. The power device of claim 9, wherein the first voltage is greater than double the voltage of the second voltage.

14. The power device of claim 9, wherein the voltage converter reduces the voltage of the power signal from the first voltage to the second voltage.

15. The power device of claim 9, wherein the voltage converter is operable to reduce the voltage of the power signal from the first voltage to the second voltage, and is operable to convert a voltage from the charge-storing device from the second voltage to the first voltage.

16. A power system for providing power in a vehicle, comprising:

a power source generating a power signal having a first DC voltage;

a power device electrically coupled to the power source, the power device comprising;

a housing installed within the vehicle;

a connector carried by the housing and adapted for coupling the power device to the power source;

a voltage converter within the housing and electrically coupled with the first connector, the voltage converter comprising an AC/DC converter and a DC/AC converter; and

a charge-storing device within the housing and electrically coupled with the voltage converter;

wherein the voltage converter receives the first DC voltage from the power source, converts the first DC voltage to a second DC voltage, and provides the second DC voltage to the charge-storing device storing charge from the second voltage enabling the stored charge to be provided as a source of electrical power for vehicle electronics; and

wherein the housing has a size or volume of a standard twelve volt automotive battery, encloses the voltage converter and charge-storing device together within the housing, and is installed in the same space in which an automotive battery would be installed in the vehicle.