Selective discharging of rechargeable battery pack across system load

Patent metadata

Field	Value
Publication number	US-11936236-B2
Application number	US-202117205110-A
Country	US
Kind code	B2
Filing date	Mar 18, 2021
Priority date	Mar 18, 2021
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

Selective discharging of a rechargeable battery pack across a power supply system load is provided, which includes determining occurrence of a condition within the power supply system, the power supply system including a power supply circuit and a backup energy source. The power supply circuit receives main input power, and the backup energy source is operatively coupled to the power supply circuit to supply backup power to the system load when main power input to the power supply circuit is unavailable. Based on determining occurrence of the condition within the power supply system, a controller actively discharges a rechargeable battery pack of the backup energy source. The actively discharging includes controlling the power supply circuit to force discharging of power from the rechargeable battery pack to the power supply system load by suspending the main input power within the system from powering the system load.

First claim

What is claimed is:

1. A method comprising:
determining occurrence of a condition within a power supply system powering a system load, the power supply system including a power regulation circuit and a backup energy source, the power regulation circuit receiving main input power to power the system load and the backup energy source being operatively coupled to the power regulation circuit to supply backup power to the system load based on main input power to the power regulation circuit being unavailable to power the system load; and
based on determining occurrence of the condition within the power supply system, actively discharging, by a controller, a rechargeable battery pack of the backup energy source, the actively discharging comprising:
controlling the power regulation circuit to:
suspend the main input power within the power supply system from powering the system load; and
force discharge of power from the rechargeable battery pack to the system load.

2. The method of claim 1 , wherein the determined condition is related to the rechargeable battery pack, and the method further comprises monitoring a state of charge of the rechargeable battery pack, and based on the state of charge dropping to a set discharge threshold, discontinuing controlling the power regulation circuit to force discharging of power from the rechargeable battery pack to the system load.

3. The method of claim 2 , wherein the determined condition is that the rechargeable battery pack requires servicing.

4. The method of claim 2 , wherein the actively discharging further comprises blocking a charge circuit of the backup energy source from recharging the rechargeable battery pack.

5. The method of claim 1 , wherein the power regulation circuit comprises a rectification and phase selection circuit and a power factor correction circuit, and wherein suspending the main input power from powering the system load comprises shutting down, at least in part, the rectification and phase selection circuit or the power factor correction circuit to suspend the main input power within the power supply system from powering the system load.

6. The method of claim 5 , wherein suspending the main input power from powering the system load comprises blocking the main input power from powering an intermediate power bus of the power regulation circuit, the suspending resulting in the discharging of the power from the rechargeable battery pack to the intermediate power bus.

7. The method of claim 1 , wherein the determined condition is that the rechargeable battery pack is to undergo a state of health (SoH) test.

8. The method of claim 7 , further comprising monitoring a state of charge of the rechargeable battery pack, and based on the state of charge dropping to a set discharge threshold, discontinuing controlling the power regulation circuit to force discharging of power from the rechargeable battery pack to the system load.

9. The method of claim 1 , wherein the determined condition is an error condition related to one or more components of the power regulation circuit.

10. The method of claim 9 , further comprising temporarily shutting down the one or more components of the power regulation circuit to clear the error condition from the power regulation circuit, and discontinuing controlling the power regulation circuit to force discharging of power from the rechargeable battery pack based on clearing of the error condition from the power regulation circuit.

11. The method of claim 1 , wherein the power supply system comprises redundant power regulation circuits, each with associated redundant rechargeable battery packs, and wherein the actively discharging further comprises:
determining an operating mode of the power supply system, and based on the operating mode being a reduced redundancy mode:
avoiding suspending the main input power within the power supply system from powering the system load;
controlling the backup energy source to discharge power from the rechargeable battery pack through a balancing circuit associated with the rechargeable battery pack; and
discontinuing discharging of the rechargeable battery pack through the balancing circuit associated with the rechargeable battery pack based on a state of charge of the rechargeable battery pack dropping to a set discharge threshold.

12. A power supply system comprising:
a power regulation circuit, the power regulation circuit receiving main input power, and the power regulation circuit powering a system load using the main input power;
a backup energy source, the backup energy source including a rechargeable battery pack, and the backup energy source being operatively coupled to the power regulation circuit to supply backup power to the system load when main input power to the power supply system load is unavailable; and
a controller, the controller being operatively coupled to:
suspend the main input power within the power supply system from powering the system load; and
force discharge of power from the rechargeable battery pack to the system load.

13. The power supply system of claim 12 , wherein the determined condition is that the rechargeable battery requires servicing, and wherein the controller further blocks a charge circuit of the backup energy source from recharging the rechargeable battery pack, and monitors a state of charge of the rechargeable battery pack, and based on the state of charge dropping to a set discharge threshold, discontinues controlling the power regulation circuit to force discharging of power from the rechargeable battery pack to the system load.

14. The power supply system of claim 12 , wherein the power regulation circuit comprises a rectification and phase selection circuit and a power factor correction circuit, and wherein suspending the main input power from powering the system load comprises shutting down, at least in part, the rectification and phase selection circuit or the power factor correction circuit to suspend the main input power within the power supply system from powering the system load.

15. The power supply system of claim 12 , wherein the determined condition is that the rechargeable battery pack is to undergo a state of health (SoH) test, and wherein the controller monitors a state of charge of the rechargeable battery pack, and based on the state of charge dropping to a set discharge threshold, discontinues controlling the power regulation circuit to force discharging of power from the rechargeable battery pack to the power supply system load.

16. The power supply system of claim 12 , wherein the determined condition is an error condition related to one or more components of the power regulation circuit, and wherein the controller temporarily shuts down the one or more components of the power regulation circuit to clear the error condition from the power regulation circuit, and based on clearing the error condition for the power regulation circuit, discontinues controlling the power regulation circuit to force discharging of power from the rechargeable battery pack to the system load.

17. A computer program product comprising:
at least one computer-readable storage medium having computer-readable code embodied therein, the computer-readable code being executable by one or more processors to cause the one or more processors to:
determine occurrence of a condition within a power supply system powering a system load, the power supply system including a power regulation circuit and a backup energy source, the power regulation circuit receiving main input power to power the system load and the backup energ

Assignees

• IBM

Inventors

• Singer Noah
• Ahladas Steven John
• Mullady Robert K
• Tucker Brian Charles

Classifications

• H02J7/875

  Charging or discharging for charge maintenance, battery initiation or rejuvenation · CPC title

• H02J7/855 Primary

  with circuits adapted for supplying loads from the battery · CPC title

• H02J7/84

  Control of state of health [SOH] · CPC title

• H02J7/80 Primary

  including monitoring or indicating arrangements · CPC title

• H02J9/061 Primary

  for DC powered loads · CPC title