BATTERY SUPPLEMENTING SUPER CAPACITOR ENERGY STORAGE CHARGE AND DISCHARGE CONVERTER

• US 20090206657A1
• Filed: 02/15/2008
• Published: 08/20/2009
• Est. Priority Date: 02/15/2008
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: VUK, IVAN, Kojori, Hassan Ali, Rusan, Ileana
• Granted Patent: US 7,786,620 B2
• Time in Patent Office: Days
• US Class Current: 307/9.100
• CPC Class Codes: H01M 10/4264 with capacitors
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A super capacitor energy storage supplementing a battery providing power to a direct current bus including charge and discharge converters is disclosed. A bank of super capacitors may be charged by a battery with a pulse-width modulation controller and an electromagnetic interference filter. The bank of super capacitors may be controllably connected to the direct current bus through an isolating transformer implemented as a isolated boost converter.

Claims

1. A super capacitor charge-discharge apparatus comprising:

a power source connected to a direct current bus;

a super capacitor bank charged by said power source and controllably connected to said direct current bus;

a control module connected to said super capacitor bank and monitoring a voltage of said direct current bus, said control module providing signals to connect said super capacitor bank to said direct current bus when said voltage is less than a predetermined level.

2. The apparatus of claim 1, further comprising a switch isolation path connecting said super capacitor bank to said power source and charging said super capacitor bank.

3. The apparatus of claim 1, further comprising leakage blocking connected to said super capacitor bank.

4. The apparatus of claim 1, further comprising transient protection connected to said power source.

5. The apparatus of claim 1, further comprising an electromagnetic interference filter connected to said power source and filtering power provided from said power source to said super capacitor bank.

6. The apparatus of claim 1, wherein said control module is a pulse-width modulation controller operated with sensed current feedback.

7. The apparatus of claim 1, wherein said control module is a pulse-width modulation controller operated with sensed voltage feedback.

8. The apparatus of claim 1, wherein said control module is a pulse-width modulation controller including over-current load protection.

9. The apparatus of claim 1 wherein said super capacitor bank is connected to said direct current bus by a converter.

10. An aircraft power system comprising:

a power source connected to a direct current bus;

an electrical system drawing power from said direct current bus;

a super capacitor bank charged by said power source and controllably connected to said direct current bus;

a control module monitoring energy parameters of said direct current bus and connecting said super capacitor bank to said direct current bus in response to monitored energy parameters.

11. The aircraft power system of claim 10 wherein said power source comprises a battery.

12. The aircraft power system of claim 10 wherein said super capacitor bank comprises an array of super capacitors.

13. The aircraft power system of claim 10 wherein said power source is connected to said super capacitor bank through an electromagnetic interference filter.

14. The aircraft power system of claim 10 wherein said control system is a pulse width modulation controller.

15. A method of providing supplemental energy to an aircraft energy system including a power source connected to a DC bus and a supplemental energy source, the method comprising:

monitoring a voltage level of the DC bus;

determining if said voltage level is below a threshold value; and

connecting said supplemental energy source to said DC bus.

16. The method of claim 15, wherein said supplemental energy source comprises a capacitance.

17. The method of claim 16, wherein said capacitance comprises a plurality of super capacitors.

18. The method of claim 15 wherein said step of connecting is performed using a SEPIC controller.

19. The method of claim 15 further comprising determining if a voltage level is above a threshold charge value and connecting said supplemental energy source to a charging power source.

20. The method of claim 15 further comprising charging said supplemental energy source.