Abnormal battery positioning method and device based on voltage / current magnitude and fluctuation parameters thereof, and storage medium

By monitoring voltage and current fluctuation parameters and using slope change time and standard deviation calculation, abnormal battery cells can be automatically identified and removed, solving the problem of the inability to identify problematic batteries in the existing technology and improving the operating efficiency and reliability of the battery system.

CN120669156APending Publication Date: 2025-09-19STATE GRID JIANGSU ELECTRIC POWER CO XUZHOU POWER SUPPLY CO
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Patent Information

Application Number
CN202510954825.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-11
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

Existing technologies are unable to effectively identify and locate problematic single cells in a battery pack during operation, resulting in a decrease in the overall battery pack capacity, affecting the DC bus voltage and equipment power supply reliability.

Method used

By monitoring the voltage and current fluctuation parameters of the battery pack, using slope change time, historical data comparison and mean standard deviation calculation, combined with the 3σ judgment principle, abnormal battery cells can be automatically identified and removed to ensure that the DC bus voltage is not lower than the set threshold.

Benefits of technology

It achieves rapid and accurate positioning and removal of abnormal battery cells, improves the operating efficiency and reliability of the battery system, and reduces manpower and material resources.

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Abstract

The invention discloses an abnormal battery positioning method and device based on voltage / current magnitude and fluctuation parameters thereof and a storage medium, and relates to the technical field of battery state detection, and the method comprises the steps: S1, judging the current charging and discharging state of a storage battery; s2, judging whether a single body in the storage battery pack is in an accident discharge state or not according to the S1; s3, judging an abnormal single storage battery according to the S2; s4, carrying out self-analysis and decision-making on the abnormal storage battery monomers judged in the S3 through a storage battery monomer removal decision-making module; and after the decision is to cut off the storage battery monomer, if the voltage of the direct current bus is not lower than a set threshold value, the storage battery monomer cutting-off decision module automatically cuts off the abnormal storage battery monomer and gives an alarm of timely replacing the abnormal storage battery. The method can quickly and accurately position the abnormal cells in the whole group of operating storage batteries, gives consideration to the safety and economy of the operation of the storage battery pack, and carries out the processing and logic analysis through obtaining, calculation, judgment and decision-making modules on the basis of the existing collected data.
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