MATERIALS, SYSTEMS, AND METHODS FOR ENCAPSULATING THERMAL BARRIER MATERIALS

The present disclosure relates to an insulation barrier for use in an electrical energy storage system, the insulation barrier comprising: at least one insulation layer; a support member surrounding at least a portion of the insulation layer; an encapsulation layer at least partially surrounding the insulation layer, wherein the encapsulation layer comprises a laminate film comprising an outer polymer layer, a rigid layer, and an inner polymer layer, wherein the inner polymer layer is in contact with the insulation layer and wherein the rigid layer is disposed between the outer polymer layer and the inner polymer layer; and wherein the encapsulation layer further comprises an extension portion extending beyond the support member in contact with an interior surface of a battery cell enclosure to form a seal with an interior surface of the battery cell enclosure.