Lithium iron phosphate battery anomaly detection method, electronic device, and storage medium

By calculating the voltage drop rate of a single lithium iron phosphate battery cell and combining it with the initial voltage entropy value for evaluation, the problem of difficulty in detecting micro short-circuit faults in lithium iron phosphate batteries in the prior art has been solved, and highly accurate anomaly detection has been achieved.

CN121656863BActive Publication Date: 2026-06-26HUADIAN ELECTRIC POWER SCI INST CO LTD +1
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUADIAN ELECTRIC POWER SCI INST CO LTD
Filing Date
2026-02-09
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively detect micro-short circuit faults in lithium iron phosphate batteries within the 20% to 80% state of charge range, leading to missed or false diagnoses and failing to accurately locate abnormal battery cells.

Method used

By acquiring the voltage and temperature values ​​of individual cells in the battery cluster, calculating and correcting the voltage drop rate, and combining this with the initial voltage entropy value, the consistency of the battery cluster is evaluated, and individual cell anomalies are identified.

Benefits of technology

It improves the detection accuracy of micro-short circuit faults in lithium iron phosphate batteries, reduces missed and false detections, and can accurately locate abnormal battery cells.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121656863B_ABST
    Figure CN121656863B_ABST
Patent Text Reader

Abstract

The application discloses a lithium iron phosphate battery abnormality detection method, an electronic device and a storage medium, and relates to the technical field of battery health management. The method comprises the following steps: acquiring voltage values and temperature values of each battery monomer in a battery cluster every interval unit time; determining a voltage drop rate of any battery monomer in the battery cluster based on the voltage values of the first time and the last time in the first unit time, and correcting the voltage drop rate in combination with the temperature value of the last time; and when the corrected voltage drop rate is greater than a preset threshold value in the second unit time, taking the last time of the second unit time as a starting time, if the corrected voltage drop rates of all unit times are greater than the preset threshold value within a first preset time period, determining an initial voltage entropy value based on the voltage values of each battery monomer acquired in the last second unit time. The application realizes abnormality detection of the lithium iron phosphate battery by combining the voltage drop rate and the initial voltage entropy value.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Battery fault diagnosis method, storage medium and electronic equipment

    CN115327380A

  • Method for screening low-voltage defective batteries

    CN116829967A

  • KR20250030297A