High-temperature phase-change heat-insulation ceramic fiber aerogel and preparation method thereof

By in-situ encapsulating high-temperature phase-change thermally insulated ceramic fiber aerogel of high-temperature phase-change microcapsules in the ceramic fiber network, the problems of insufficient temperature range, poor mechanical strength and heat resistance in the thermal management of aerodynamic batteries are solved, and effective heat absorption and significant improvement in battery safety performance in high-temperature environments are achieved.

CN119954517AActive Publication Date: 2025-05-09CIVIL AVIATION UNIV OF CHINA
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Patent Information

Application Number
CN202510435756.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-09
Publication Date
2025-05-09
Estimated Expiration
2045-04-09

AI Technical Summary

Technical Problem

In the thermal management of aerodynamic batteries, existing phase change materials have problems such as insufficient phase change temperature range, poor mechanical strength and heat resistance, and low integration, making it difficult to effectively prevent and control the thermal runaway of the battery.

Method used

High-temperature phase change thermal insulation ceramic fiber aerogel is adopted to encapsulate high-temperature phase change microcapsules in situ in the ceramic fiber network, combining the excellent mechanical and heat resistance of ceramic fibers, enhancing the reliability of the thermal management layer and directly integrating it into the aerospace power battery thermal management system.

Benefits of technology

It realizes effective heat absorption in high-temperature environments, suppresses battery temperature rise rate and peak temperature, and significantly improves the safety performance and thermal management efficiency of aerospace power batteries.

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Abstract

The invention belongs to the technical field of phase-change ceramic fiber aerogel, and discloses high-temperature phase-change heat-insulation ceramic fiber aerogel and a preparation method thereof.The preparation method comprises the steps that polycarbosilane and polyvinylpyrrolidone are added into an organic solvent to be mixed and stirred till the polycarbosilane and the polyvinylpyrrolidone are completely dissolved, and a precursor solution is obtained; dispersing a high-temperature phase change microcapsule into the precursor solution, and stirring until the high-temperature phase change microcapsule is uniformly dispersed to obtain a spinning solution; a ceramic precursor fiber membrane is obtained through electrostatic spinning, and the high-temperature phase-change heat-insulation ceramic fiber aerogel is obtained through cross-linking curing and sintering. The thermal conductivity of the high-temperature phase-change heat-insulation ceramic fiber aerogel is adjustable between 0.03 W / (m.k) and 0.05 W / (m.k), the phase-change temperature ranges from 550 DEG C to 600 DEG C, and the phase-change enthalpy value ranges from 400 J / g to 500 J / g. Compared with traditional ceramic aerogel, the aerogel can regulate and control the environment temperature, is more resistant to high temperature and safer, and has wide application in the field of high-temperature heat insulation of aviation power batteries.
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Citation Information

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