Method and apparatus for pre-diagnosing safety of a battery

By measuring the battery cell voltage and calculating the short-circuit resistance while the vehicle is parked, the accuracy problem of battery micro-short circuit detection is solved, enabling advance diagnosis of battery safety and reducing the risk of battery fires.

CN122307347APending Publication Date: 2026-06-30HYUNDAI MOTOR CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HYUNDAI MOTOR CO LTD
Filing Date
2025-06-23
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing technologies struggle to detect battery short circuits quickly and accurately in the initial stages, especially as micro-short circuits grow, leading to inaccurate battery safety assessments and posing a fire risk.

Method used

By intermittently measuring the voltage of each battery cell during vehicle parking, calculating the short-circuit resistance, and dynamically setting thresholds based on open-circuit voltage changes and state of charge, a pre-diagnosis of micro-short circuits can be achieved.

Benefits of technology

It improves the accuracy and resolution of battery safety pre-diagnosis, enabling timely detection of micro-short circuits in the initial stage and reducing the risk of battery fires.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to a method and apparatus for pre-diagnosing the safety of a battery. The apparatus for pre-diagnosing the safety of a vehicle battery includes a memory configured to store computer-readable instructions and a processor configured to execute the computer-readable instructions. The processor is configured to determine a first voltage and a second voltage for each of a plurality of battery cells while the vehicle is parked. The processor is also configured to determine a short-circuit resistance for each of the plurality of cells based on the first and second voltages determined for each cell. The processor is further configured to determine whether a micro-short circuit exists in each of the plurality of cells based on a comparison between the short-circuit resistance determined for each cell and a threshold value.
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