PASSIVE INSULATION MATERIALS

摘要

A material consisting of an insulating, ceramic-based matrix into which an endothermic gas-generating material is incorporated for the intended purpose of protecting electrical energy storage devices from cascading thermal runaway.

主权项

1. A material for limiting thermal runaway in devices comprising a plurality of electrical storage devices, said devices having an upper normal operating temperature and a higher threshold temperature above which the devices are liable to thermal runaway, the material comprising a ceramic matrix that incorporates an inorganic gas-generating endothermic material, and in which:
the ceramic matrix is capable of providing thermal insulation properties at and above the upper normal operating temperature; the endothermic material is selected to undergo one or more endothermic reactions between the upper normal operating temperature and the higher temperature; one or more of said reactions results in the evolution of gases; the ceramic matrix has sufficient porosity to permit said gases to vent from the material and thereby remove heat from the material.