Thermal barrier article for a rechargeable electrical energy storage system

EP4705098A1Pending Publication Date: 2026-03-113M INNOVATIVE PROPERTIES CO
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-05-02
Publication Date
2026-03-11

AI Technical Summary

Technical Problem

High energy rechargeable batteries in electric vehicles are prone to thermal runaway, leading to catastrophic failures that pose risks to occupants due to uncontrolled fires and shrapnel, with existing materials unable to withstand both high temperatures and blast associated with such events.

Method used

A multilayer thermal barrier article comprising fabric and ceramic layers, with an adhesive layer, designed to withstand flexure and pyrotechnic blasts exceeding 1200°C, providing both thermal insulation and blast resistance to mitigate damage from thermal runaway incidents.

Benefits of technology

The multilayer thermal barrier effectively withstands extreme temperatures and blast impacts for extended periods, ensuring occupant safety by preventing damage from thermal runaway events in electric vehicle batteries.

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Abstract

A thermal barrier article comprises a multilayer material that includes a first fabric layer disposed on a first side of a ceramic layer and a second fabric layer disposed on an opposite side of the ceramic layer. The thermal barrier article can also comprise an alternating arrangement of a plurality of fabric layers and ceramic layers. In each of these aspects, the thermal barrier article has sufficient flexure and thermal properties to withstand a flexural conditioning test and a pyrotechnic blast test that has a temperature of at least 1200°C and expels a non-insubstantial amount of particulate.
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