Lithium battery monitoring device based on multi-parameter sensor and sensor preparation method

By using multi-parameter sensors with integrated resistive gas and temperature sensors in lithium batteries, real-time monitoring of hydrogen and temperature inside lithium batteries is achieved, solving the problem of early thermal runaway warning in the prior art, and improving the safety and life evaluation of the battery.

CN120103185APending Publication Date: 2025-06-06GUIZHOU UNIV
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Patent Information

Application Number
CN202510262320.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-06
Publication Date
2025-06-06

AI Technical Summary

Technical Problem

The existing lithium battery thermal runaway state detection technology cannot monitor the internal state of the battery in real time, resulting in the inability to achieve early thermal runaway warning, affecting battery life and safety assessment.

Method used

It adopts multi-parameter sensor, integrated resistive gas sensor and resistive temperature sensor, uses gas-sensitive mechanism to detect hydrogen, and uses temperature-sensitive mechanism to monitor the internal temperature of the battery in real time to form an integrated dual-function multi-parameter sensor.

Benefits of technology

It realizes accurate, stable and reliable monitoring of hydrogen and temperature inside lithium batteries, provides detectability of smart batteries and early thermal runaway warning, and solves the problems of inaccurate internal state evaluation and poor timeliness in the existing technology.

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Abstract

The invention belongs to the technical field of lithium battery early thermal runaway early warning, and provides a lithium battery monitoring device based on a multi-parameter sensor and a sensor preparation method. The temperature-sensitive resistance layer is arranged on one side of the substrate PI film, an upper electrode assembly is arranged between the substrate PI film and the temperature-sensitive resistance layer, and the upper electrode assembly is used for being connected with the temperature-sensitive resistance layer and providing a signal transmission function; the gas sensitive resistance layer is arranged on the other side of the substrate PI film, a lower electrode assembly is arranged between the substrate PI film and the gas sensitive resistance layer, and the lower electrode assembly is used for being connected with the gas sensitive resistance layer and providing a signal transmission function; and the protective layer comprises a protective film arranged on the surface of the temperature-sensitive resistance layer and a breathable protective film arranged on the surface of the gas-sensitive resistance layer. According to the invention, the original data of the internal state of the lithium battery can be obtained, the detectability and early thermal runaway early warning of the intelligent battery are realized, and the safety of the lithium battery is improved.
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