Safety vent for extended battery storage

摘要

The battery includes a metal container containing active materials, forming respectively the anode and the cathode, and an electrolyte, said container being sealed at its upper part by a hermetically sealed cap and separated from the active materials by an insulating element, said cap being provided with two contact terminals, electrically connected to the anode and the cathode by connecting means, and a through passage formed by a tube arranged in proximity to or merged with the negative terminal, said through passage, connecting the interior and the exterior of the battery, being closed to wards the exterior by a metal hotmelt composition. The event is characterized in that said through passage is further closed to wards the interior by an organic composition which is inert as regards the electrolyte and has a melting point lower than or equal to that of the metal hotmelt composition