Battery thermal runaway radical treatment agent based on thermal trigger guidance and chemical passivation as well as preparation method and application of battery thermal runaway radical treatment agent

CN121422425APending Publication Date: 2026-01-30SUIREN FIRE TECH CO LTD
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Patent Information

Application Number
CN202511302584.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-12
Publication Date
2026-01-30

AI Technical Summary

Technical Problem

When a battery experiences thermal runaway, traditional fire extinguishing agents cannot effectively penetrate into the battery's interior, thus failing to terminate the internal electrochemical reaction. This poses a risk of reignition and may even exacerbate the reaction.

Method used

Microencapsulated sodium particles were used as thermally triggered open circuit agents, and nano-CuO and LiPO2F2 composites were used as ion immobilizers. Combined with PFPE/HFO-7000 carriers, the electrochemical reaction was terminated through chemical passivation and physical open circuit mechanisms.

Benefits of technology

It achieves rapid and complete termination of the internal electrochemical reaction of the battery, avoids reignition, generates a stable SEI passivation layer, ensures safety and efficiency, adapts to extreme environments, and reduces reagent costs.

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Abstract

The invention discloses a battery thermal runaway radical treatment agent based on thermal trigger guidance and chemical passivation, and relates to the technical field of new energy battery safety, the battery thermal runaway radical treatment agent comprises the following raw materials by weight: 65-75% of a carrier, 10-20% of a thermal trigger open circuit agent, 10-20% of an ion fixing agent, and 0.5-2% of a thixotropic agent; the carrier is formed by compounding PFPE oil and HFO-7000 according to the mass ratio of (3: 1)-(1: 1); the thermal trigger open circuit agent is microencapsulated metal sodium particles of which the surfaces are coated with poly-p-xylylene protective thin layers; the ion fixing agent is composite powder composed of nanometer copper oxide and lithium difluorophosphate according to the proportion of 2: 1-1: 1; the thixotropic agent is fumed silica. The invention further provides a preparation method and application of the radical treatment agent. According to the invention, an integrated thermal trigger chemical termination mechanism is created for the first time, a physical open circuit function and a chemical fighter fighter function are integrated into a single preparation, and the root extinguishing of thermal runaway is realized through an internal chain reaction.
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