Resealable safety vent and a sealed alkaline rechargeable battery provided with the safety vent

A sealed alkaline rechargeable battery equipped with a resealable safety vent comprising:

• a safety vent body having a passage at the center of a bottom portion of said body, an end of said passage terminating in said body surrounded by a circular protrusion, and
• a safety vent cover having a vent hole fastened to said safety valve body by means of bonding to form a unitary structure with a central internal passage, and
• an elastic valve component comprising a valve seat and a rubber pad fabricated into a one-piece unit, said valve component having a top part and a flange part, said top part inserted inside a coil spring disposed in said central internal passage so that the top surface of said flange part of said valve component compresses said coil spring inside said central internal passage;
• wherein
• a bottom surface of said elastic valve component is held against said protrusion inside of said safety vent body and closes said passage in said safety vent body;
• and
• wherein a container cover in which said safety vent, is incorporated as a monobloc, or a container cover in which said safety vent is bonded or fusion bonded to become a part of the container cover, is fastened around a top edge of a container by means of bonding or fusion bonding, said safety vent incorporated into said access cover to communicate with and vent gas from inside said container, said container housing an electrode group consisting of at least one positive plate, negative plate and separator and an appropriate quantity of alkaline electrolyte for impregnation of the electrode, said safety vent is hermetically sealed with the container along the latter's top edge by means of bonding or fusion bonding.