METHOD OF FORMING PROTECTIVE COATING ON 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

The present invention provides a method of forming a protective film of a battery safety valve element which coats a protective film on a battery safety valve element to prevent corrosion of metal parts, a battery safety valve element coated with a protective film, a battery sealing plate using the same, and An object of the present invention is to provide a sealed battery. For this reason, in the present invention, the safety valve element comprises a metal substrate 1 having a through hole 4 and a metal foil 2 laminated on the metal substrate 1 so as to close the through hole 4. It consists of the film | membrane 3 which apply | coats an organic paint on at least one surface of the battery safety valve element 10. As shown in FIG. In addition, the sealing plate includes a battery safety valve element 10 in which a protective film 3 made of an organic resin film is formed, and a sealing plate 6 for battery outer cans having a through hole 4 serving as a valve hole of the safety valve. The through hole 4 of the metal substrate of the battery safety valve element 10 and the through hole 7 of the sealing plate are brought into contact with each other, and both are bonded around the through hole 7 of the sealing plate. It is a sealing plate. In addition, by using the battery sealing plate, the electrode body composed of the positive electrode, the negative electrode, and the separator is supported by being inserted into the inner circumference of the opening of the battery outer can housed together with the electrolyte solution, thereby closing the opening of the battery outer can to constitute a sealed battery. do.