Parallel Power Back-Up System

• US 20100253147A1
• Filed: 03/29/2010
• Published: 10/07/2010
• Est. Priority Date: 03/30/2009
• Status: Active Grant

• Current Assignee: Servato Corp.
• Original Assignee: Encell Technology, Inc
• Inventors: OGG, Randy
• Granted Patent: US 8,324,758 B2
• Time in Patent Office: Days
• US Class Current: 307/65
• CPC Class Codes: H02J 7/0025 Sequential battery discharge in systems with a plurality of batteries
• CPC Class Codes: H02J 9/061 for DC powered loads

Abstract

System and methods of supplying power to a load are provided. A module monitors electrical grid power. When the grid power fails the module initially provides power from a performance battery. When a bulk energy power system has warmed-up/activated, the module switches the power to the load from the performance battery to the bulk energy power system.

Claims

1. A parallel power back-up system comprising:

a performance battery having;

a rate greater than 2C; and

a cycle life greater than 300 cycles at C rate;

a bulk energy storage system; and

a controller,

wherein the performance battery and the bulk energy storage system are connected in parallel through the controller and when power to a load fails, the controller initially provides power from the performance battery and then provides power from the bulk energy strange system.

2. The parallel power back-up system of claim 1, wherein the performance battery comprises a chemistry selected from the group consisting of nickel-metal hydride, nickel-zinc, silver-zinc, nickel-cadmium, lithium-ion, and lithium-polymer.

3. The parallel power back-up system of claim 1, wherein the bulk energy storage system comprises a bulk storage battery.

4. The parallel power back-up system of claim 3, wherein the bulk storage battery comprises a chemistry selected from the group consisting of lead-acid, nickel-iron, sodium-sulfur, and zinc-manganese dioxide.

5. The parallel power back-up system of claim 1, wherein the performance battery is less than one quarter the size of the bulk energy storage system.

6. The parallel power back-up system of claim 5, wherein the performance battery is less than one tenth the size of the bulk energy storage system.

7. The parallel power back-up system of claim 1, wherein the performance battery comprises an environmentally friendly chemistry.

8. The parallel power back-up system of claim 7, wherein the performance battery comprises chemistry selected from the group consisting of nickel-metal hydride and lithium-polymer.

9. The parallel power back-up system of claim 4, wherein the bulk storage battery comprises a chemistry that is not environmentally friendly.

10. The parallel power back-up system of claim 9, wherein the bulk storage battery comprises a lead-acid chemistry.

11. The parallel power back-up system of claim 1, wherein the bulk energy storage system is less than one half the cost of the bulk energy storage system.

12. The parallel power back-up system of claim 1, wherein the bulk energy storage system costs less than $0.50/Whr.

13. The parallel power back-up system of claim 1, wherein the performance battery has a rate of 5-8C.

14. The parallel power back-up system of claim 1, wherein the performance battery has a cycle life of 450-550 cycles at C rate.

15. The parallel power back-up system of claim 4, wherein the bulk storage battery has a cycle life of 200-300 cycles at C rate.

16. The parallel power back-up system of claim 4, wherein the performance battery and the bulk storage battery each have a voltage of 24 volts.

17. The parallel power back-up system of claim 4, wherein:

a cell of the performance battery has a voltage less than 2.0 volts at C rate between 20-80% State of Charge; and

a cell of the bulk storage battery has a voltage greater than 2.0 volts at 0.25C rate between 20-80% State of Charge.

18. The parallel power back-up system of claim 17, wherein:

a cell of the performance battery has a voltage of 1-1.5 volts at C rate between 20-80% State of Charge; and

a cell of the bulk storage battery has a voltage of 2.5-3.5 volts at 0.25C rate between 20-80% State of Charge.

19. The parallel power back-up system of claim 1, wherein the bulk energy storage system is selected from the group consisting of a fuel cell, flow cell, ultra capacitor, flywheel, pumped water, compressed air, superconducting magnetic energy, and generator.