Method of forming protective coating on cell safety valve element, cell safety valve element, cell safety valve element coated with protective film, cell sealing plate using the element, and enclosed cell using the plate

摘要

A method of forming a protection film of a safety valve element for battery prevents corrosion. The safety valve element is composed of a safety valve element having a metal substrate with a perforated pore and a metal foil laminated on a metal substrate so as to cover the pore, and a protection film is formed by coating an organic coating at least on one side of the safety valve element.