NOVELTY - Thermal event suppression apparatus comprises: a fire extinguishing media case (102); a fire extinguishing media enclosed within the media case; a spray nozzle (106); a conduit fluidly connecting the media case to the nozzle, where the nozzle is adapted to be enclosed within a housing (5) of an automotive battery pack; and a thermal event detector coupled to the conduit, where the thermal event detector controls the opening of a valve in the conduit based on a temperature surrounding the thermal event detector.    USE - The thermal event suppression apparatus is useful in an automotive battery pack (claimed) as hybrid and electric cars.    ADVANTAGE - The thermal event suppression apparatus: provides extinction of a fire in a high voltage battery, in an economical manner; reduces the time between when the thermal trigger event occurs and when the thermal event is suppressed resulting from a high voltage battery being damaged in an accident; and automatically detects when a thermal triggering event occurs and automatically suppresses the thermal event.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for suppressing thermal event for an automotive battery pack (1) comprising having a thermal event suppression apparatus attached to the battery pack, where the suppression apparatus has: a nozzle that sprays a fire extinguishing media, and having the nozzle extended into a housing of the battery pack; and a thermal event detector to detect a threshold temperature, where the detector triggers a valve to open, allowing the nozzle to spray the media into the housing.    DESCRIPTION OF DRAWING(S) - The figure shows a hybrid vehicle containing a high voltage battery involved in an automobile accident causing at least one of the battery cells contained within the high voltage battery pack to be damaged resulting in the interior of the housing of the battery pack being compromised.    Battery pack (1)    Housing of the battery pack (5)    Fire extinguishing media case (102)    Nozzle (106)    Metallic strip (111)