APPARATUS FOR MITIGATION OF THERMAL EVENT PROPAGATION FOR BATTERY SYSTEMS

Apparatus for mitigating propagation of thermal events between battery cells within a battery module assembly () is provided. The apparatus comprises one or more of several features that function to prevent a runaway thermal event within one battery cell () from triggering a fire or other thermal event within another battery cell within the battery module assembly (). The apparatus may comprise one or more of: (i) a compressive wrap () applied to a battery cell (); (ii) a layered barrier material () positioned between adjacent battery cells (); (iii) silicone rubber supports () positioned adjacent the battery terminals (), (iv) a light-weight, fire-resistant housing composite panel, and (v) rupturable diaphragms () configured to vent gases and ejecta from a battery cell undergoing a thermal event.