# US 2021/0333329 A1 · Server cabinet power backup system and testing method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0333329 A1 - Document ID: US20210333329A1 - Status: Published application - Kind: A1 - Application number: 17/249,069 - Filed: 2021-02-18 - Published: 2021-10-28 - Earliest claimed: 2020-04-26 - Assignees: Beijing Baidu Netcom Science Technology Co., Ltd. - Applicants: Beijing Baidu Netcom Science and Technology Co., Ltd. - Inventors: Xiaobin Li; Xiaozhong Li; Bin Yi; Binghua Zhang - Web page: https://patentgrep.com/patent/US20210333329A1 ## CPC - G01R 31/392: Determining battery ageing or deterioration, e.g. state of health - G01R 31/387: Determining ampere-hour charge capacity or SoC - G01R 31/389: Measuring internal impedance, internal conductance or related variables - G01R 31/396: Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery - H02J 7/80: including monitoring or indicating arrangements - H02J 9/06: with automatic change-over {, e.g. UPS systems} - G01R 31/386: {using test-loads} - 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 - Y02E 60/10: Energy storage using batteries - Y04S 20/20: End-user application control systems - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS ## 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) The system according to claim 1, 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 2) 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. ### Claim 6 (depends on 3) The system according to claim 3, 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. ### Claim 7 (depends on 1) 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. ### Claim 8 (depends on 7) The system according to claim 7, 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. ### Claim 9 (depends on 1) 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. ### Claim 10 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. ### Claim 11 (depends on 10) The method according to claim 10, 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. ### Claim 12 (depends on 10) The method according to claim 10, 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. ### Claim 13 (depends on 10) The method according to claim 10, 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. ### Claim 14 (depends on 11) The method according to claim 11, 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. ### Claim 15 (depends on 12) The method according to claim 12, 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. ### Claim 16 (depends on 10) The method according to claim 10, further comprising: determining, by the battery management module, 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 the self-test condition being satisfied, performing, by the battery management module, a self-test operation on the power backup unit. ### Claim 17 (depends on 16) The method according to claim 16, wherein determining whether the self-test condition of the power backup unit is satisfied comprises: determining 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. ### Claim 18 (depends on 10) The method according to claim 10, wherein determining, by the battery management module, attenuation performance of the power backup unit according to the charge and discharge parameter of the battery pack comprises: determining, by the battery management module, 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 determining, by the battery management module, 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.