Server cabinet power backup system and testing method thereof

Patent metadata

Field	Value
Publication number	US-11519970-B2
Application number	US-202117249069-A
Country	US
Kind code	B2
Filing date	Feb 18, 2021
Priority date	Apr 26, 2020
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

Embodiments of the present disclosure provide a server cabinet power backup system and a testing method thereof. In a self-test process of the power backup unit, the battery management module may be configured to: control the battery pack to supply power to the self-test resistor to discharge the battery pack, control the battery pack to be charged after the battery pack is discharged, and collect a charge and discharge parameter of the battery pack, and the battery management module may be further configured to: determine attenuation performance of the power backup unit according to the charge and discharge parameter of the battery pack.

First claim

What is claimed is:

1. A server cabinet power backup system, comprising:
a plurality of power backup units connected in parallel, wherein each power backup unit comprises a battery pack, a battery management module and a self-test resistor, and the self-test resistor is connected in parallel with a charge loop of the battery pack,

in a self-test process of the power backup unit, the battery management module is configured to: control the battery pack to supply power to the self-test resistor to discharge the battery pack, control the battery pack to be charged after the battery pack is discharged, and collect a charge and discharge parameter of the battery pack, and
the battery management module is further configured to: determine attenuation performance of the power backup unit according to the charge and discharge parameter of the battery pack, wherein a resistance value of the self-test resistor is determined according to at least one item of: a self-test discharge duration of the battery pack, heat generated by the self-test resistor in a discharge process, or a size of the power backup unit.

2. The system according to claim 1 , wherein the battery management module is configured to control the battery pack to be fully charged and fully discharged.

3. The system according to claim 2 , wherein the power backup unit further comprises a switching circuit,
the battery management module is configured to: through the switching circuit, control the battery pack to be disconnected from a bus of a server load and control the battery pack to be electronically communicated with the self-test resistor to discharge the battery pack using the self-test resistor, and
after the battery pack is discharged, the battery management module is further configured to: through the switching circuit, control the battery pack to be disconnected from the self-test resistor, and control the battery pack to be electronically communicated with the charge loop to charge the battery pack using the charge loop.

4. The system according to claim 1 , wherein the power backup unit further comprises a switching circuit,
the battery management module is configured to: through the switching circuit, control the battery pack to be disconnected from a bus of a server load and control the battery pack to be electronically communicated with the self-test resistor to discharge the battery pack using the self-test resistor, and
after the battery pack is discharged, the battery management module is further configured to: through the switching circuit, control the battery pack to be disconnected from the self-test resistor, and control the battery pack to be electronically communicated with the charge loop to charge the battery pack using the charge loop.

5. The system according to claim 1 , wherein,
the battery management module is further configured to determine whether a self-test condition of the power backup unit is satisfied responsive to determining that the self-test time of the power backup unit is reached, and
in response to determining that the self-test condition is satisfied, the battery management module is further configured to perform a self-test operation on the power backup unit.

6. The system according to claim 5 , wherein
the battery management module is configured to determine that the self-test condition of the power backup unit is satisfied in response to the battery management module determining that a mains supply is normal, a power supply module of a server cabinet being normal, and a number of available power backup units in the power backup system being greater than a threshold value.

7. The system according to claim 1 , wherein:
the battery management module is configured to determine a dischargeable capacity and discharge time of the power backup unit in the self-test process according to the charge and discharge parameter of the battery pack, and
the battery management module is further configured to determine a dischargeable capacity and discharge time of the power backup unit at rated power according to the dischargeable capacity and the discharge time of the power backup unit in the self-test process.

8. A method for testing a server cabinet power backup system, performed by the server cabinet power backup system, wherein the server cabinet power backup system comprises a plurality of power backup units connected in parallel, each power backup unit comprises a battery pack, a battery management module and a self-test resistor, the self-test resistor is connected in parallel with a charge loop of the battery pack, the method comprising:
in a self-test process of the power backup unit, controlling, by the battery management module, the battery pack to supply power to the self-test resistor to discharge the battery pack, controlling the battery pack to be charged after the battery pack is discharged, and collecting a charge and discharge parameter of the battery pack, and
determining, by the battery management module, attenuation performance of the power backup unit according to the charge and discharge parameter of the battery pack,
wherein a resistance value of the self-test resistor is determined according to at least one item of: a self-test discharge duration of the battery pack, heat generated by the self-test resistor in a discharge process, or a size of the power backup unit.

9. The method according to claim 8 , wherein controlling, by the battery management module, the battery pack to supply power to the self-test resistor to discharge the battery pack, and controlling the battery pack to be charged after the battery pack is discharged comprises:
controlling, by the battery management module, the battery pack to supply power to the self-test resistor to discharge the battery pack, and controlling the battery pack to be charged until the battery pack is fully charged, after the battery pack is fully discharged.

10. The method according to claim 9 , wherein the power backup unit further comprises a switching circuit, and
controlling, by the battery management module, the battery pack to supply power to the self-test resistor to discharge the battery pack, and controlling the battery pack to be charged after the battery pack is discharged comprises:
through the switching circuit, controlling, by the battery management module, the battery pack to be disconnected from a bus of a server load, and controlling the battery pack to be electronically communicated with the self-test resistor to discharge the battery pack using the self-test resistor; and
after the battery pack is discharged, through the switching circuit, controlling, by the battery management module, the battery pack to be disconnected from the self-test resistor, and controlling the battery pack to be communicated with the charge loop to charge the battery pack using the charge loop.

11. The method according to claim 8 , wherein the power backup unit further comprises a switching circuit, and
controlling, by the battery management module, the battery pack to supply power to the self-test resistor to discharge the battery pack, and controlling the battery pack to be charged after the battery pack is discharged comprises:
through the switching circuit, controlling, by the battery management module, the battery pack to be disconnected from a bus of a server load, and controlling the battery pack to be electronically communicated with the self-test resistor to discharge the battery pack using the self-test resistor; and
after the battery pack is discharged, through the switching circuit, controlling, by the batter

Assignees

• Beijing Baidu Netcom Sci & Tech Co Ltd

Inventors

• Li Xiaobin
• Li Xiaozhong
• Yi Bin
• Zhang Binghua

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H02J7/80

  including monitoring or indicating arrangements · CPC title

• G01R31/389

  Measuring internal impedance, internal conductance or related variables · CPC title

• G01R31/392 Primary

  Determining battery ageing or deterioration, e.g. state of health · CPC title

• H02J2207/10

  Control circuit supply, e.g. means for supplying power to the control circuit · CPC title