A vehicle-mounted lithium ion battery fault diagnosis system based on a MEMS fluxgate array

The MEMS fluxgate array sensor enables real-time and accurate fault diagnosis of lithium-ion batteries, solving the problems of insufficient real-time performance and limited monitoring accuracy in existing technologies. The sensor array can monitor individual cells in the battery pack at high density, improving the reliability of fault identification and spatial resolution accuracy.

CN122260146APending Publication Date: 2026-06-23XINGANTONG TECHNOLOGY (WUHAN) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINGANTONG TECHNOLOGY (WUHAN) CO LTD
Filing Date
2026-03-24
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing battery monitoring methods suffer from problems such as insufficient real-time performance, limited monitoring accuracy, and difficulty in integration.

Method used

A vehicle-mounted lithium-ion battery fault diagnosis system based on MEMS fluxgate array is adopted. MEMS fluxgate sensors are fabricated using microelectromechanical systems technology, and symmetrically arranged magnetic field line aggregators are integrated. Magnetic field detection is performed through distributed deployment of the sensor array, and three-dimensional vector components are acquired simultaneously to eliminate the ambiguity of single scalar measurement and realize non-contact battery state monitoring.

Benefits of technology

It enables real-time and accurate diagnosis of internal battery faults. The sensor array can be scaled down to the mm level, with detection accuracy reaching the nT level. It has low power consumption and can monitor individual cells in the battery pack at high density. It improves the sensitivity and resolution of magnetic field detection and enhances the reliability and spatial resolution accuracy of fault identification.

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Abstract

The application discloses a vehicle-mounted lithium ion battery fault diagnosis system based on a MEMS magnetic flux gate array, and relates to the field of new energy sources.The micro-electromechanical system technology is adopted to integrate the magnetic field concentrators arranged symmetrically in the MEMS magnetic flux gate, the magnetic field to be measured is efficiently gathered and guided to pass through the sensitive area of the magnetic core in a concentrated manner, and the polyimide packaging design is adopted to ensure the adaptability to the internal environment of the battery and the long-term stability.The size of the MEMS magnetic flux gate sensor can be reduced to the millimeter level, so that the sensor can be directly embedded in the interior of the battery monomer or closely attached to the surface of the battery, the detection accuracy can reach the nT level, and the high-density monitoring network of the battery monomers in the battery pack is realized.The MEMS magnetic flux gate sensor array can be used for vector detection, the sensor array can be distributedly arranged at the key positions of the battery pack, and the magnetic field change can be continuously monitored without mechanical scanning.
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