Systems and methods for enabling multiple battery backup units in a system

• US 10,158,247 B2
• Filed: 12/16/2016
• Issued: 12/18/2018
• Est. Priority Date: 12/16/2016
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Wang, Ligong, Zhu, Guangyong
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): VU, TOAN T
• Application Number:
  US15/381,550
• Publication Number:
  US 20180175664A1
• Time in Patent Office: 732 Days
• Field of Search: 307 66
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/34 Parallel operation in networks using both storage and other dc sources, e.g. providing buffering H02J7/14 takes precedence
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

A battery backup unit for supplying electrical energy in response to a power event affecting an ability of a power supply unit to deliver electrical energy may be configured to, in response to the power event, generate a regulated output voltage having a first voltage magnitude for a first period of time to limit power generated by the battery backup unit to a first power magnitude during the first period of time, and after the first period of time, generate the output voltage having a second voltage magnitude lesser than the first voltage magnitude for a second period of time to limit power generated by the battery backup unit to a second power magnitude lesser than the first power magnitude, wherein the second power magnitude is a function of a continuous maximum power supported by the battery backup unit based on characteristics of the battery backup unit.

Claims

1. An information handling system comprising:

an information handling resource;

a power input for receiving electrical energy for powering the information handling resource via a power bus; and

a battery backup unit for supplying electrical energy to the information handling resource via the power bus in response to a power event affecting an ability of a power supply unit to deliver electrical energy to the power bus, the battery backup unit configured to, in response to the power event;

generate a regulated output voltage having a first voltage magnitude for a first period of time to limit power generated by the battery backup unit to a first power magnitude during the first period of time; and

after the first period of time, generate the output voltage having a second voltage magnitude lesser in magnitude than the first voltage magnitude for a second period of time to limit power generated by the battery backup unit to a second power magnitude lesser in magnitude than the first power magnitude during the first period of time, wherein the second power magnitude is a function of a continuous maximum power supported by the battery backup unit based on characteristics of the battery backup unit.

2. The information handling system of claim 1, wherein the information handling resource is a persistent memory, and the second period of time is a time sufficient for the persistent memory to perform a save operation.

3. The information handling system of claim 1, wherein the battery backup unit is further configured to decrease the output voltage in a plurality of steps from the first voltage magnitude to the second voltage magnitude during a third period of time intermediate to the first period of time and the second period of time.

4. The information handling system of claim 1, wherein the second period of time is a time sufficient for the information handling resource to perform a graceful shutdown.

5. The information handling system of claim 1, wherein the second period of time is a time sufficient for the information handling resource to perform a memory save operation.

6. A battery backup unit for supplying electrical energy to an information handling resource via a power bus in response to a power event affecting an ability of a power supply unit to deliver electrical energy to the information handling resource via the power bus, the battery backup unit configured to, in response to the power event:

generate a regulated output voltage having a first voltage magnitude for a first period of time to limit power generated by the battery backup unit to a first power magnitude during the first period of time; and

after the first period of time, generate the output voltage having a second voltage magnitude lesser in magnitude than the first voltage magnitude for a second period of time to limit power generated by the battery backup unit to a second power magnitude lesser in magnitude than the first power magnitude during the first period of time, wherein the second power magnitude is a function of a continuous maximum power supported by the battery backup unit based on characteristics of the battery backup unit.

7. The battery backup unit of claim 6, wherein the information handling resource is a persistent memory, and the second period of time is a time sufficient for the persistent memory to perform a save operation.

8. The battery backup unit of claim 6, wherein the battery backup unit is further configured to decrease the output voltage in a plurality of steps from the first voltage magnitude to the second voltage magnitude during a third period of time intermediate to the first period of time and the second period of time.

9. The battery backup unit of claim 6, wherein the second period of time is a time sufficient for the information handling resource to perform a graceful shutdown.

10. The battery backup unit of claim 6, wherein the second period of time is a time sufficient for the information handling resource to perform a memory save operation.

11. A method comprising, in a system comprising a battery backup unit for supplying electrical energy to an information handling resource via a power bus in response to a power event affecting an ability of a power supply unit to deliver electrical energy to the information handling resource via the power bus, in response to the power event:

generating a regulated output voltage having a first voltage magnitude for a first period of time to limit power generated by the battery backup unit to a first power magnitude during the first period of time; and

after the first period of time, generating the output voltage having a second voltage magnitude lesser in magnitude than the first voltage magnitude for a second period of time to limit power generated by the battery backup unit to a second power magnitude lesser in magnitude than the first power magnitude during the first period of time, wherein the second power magnitude is a function of a continuous maximum power supported by the battery backup unit based on characteristics of the battery backup unit.

12. The method of claim 11, wherein the information handling resource is a persistent memory, and the second period of time is a time sufficient for the persistent memory to perform a save operation.

13. The method of claim 11, further comprising decreasing, by the battery backup unit, the output voltage in a plurality of steps from the first voltage magnitude to the second voltage magnitude during a third period of time intermediate to the first period of time and the second period of time.

14. The method of claim 11, wherein the second period of time is a time sufficient for the information handling resource to perform a graceful shutdown.

15. The method of claim 11, wherein the second period of time is a time sufficient for the information handling resource to perform a memory save operation.