Protective film forming method for full valve element for battery, battery full valve element coated with protective film, battery sealing plate using the same, and sealed battery using the same

摘要

The present invention is a method for forming a protective film for a battery full valve element for covering the protective valve covering the protective valve of the battery for preventing the corrosion of the metal part, a protective valve element for the battery covering the protective film, a sealing plate for the battery using the same, and a closed cell using the same The purpose of the present invention is to provide an object. For this reason, in the present invention, the safety valve element is formed of a metal substrate 1 having a through hole 4 and a metal foil 2 stacked on the metal substrate 1 so as to block the through hole 4, and at least one surface of the battery full valve element 10 coated with an organic paint . Further, the sealing plate is provided with a battery full valve element 10 having a protective film 3 made of an organic resin film, a sealing plate 6 for a battery external can having a through hole 4 serving as a valve of a safety valve, and a through hole 4 of a metal substrate of the safety valve element 10 for a battery and a through hole 7 of the sealing plate As shown in Fig. 2, the sealing plate is brought into contact with each other, and both of them are adhered to the periphery of the through hole 7 of the sealing plate to form the sealing plate for the battery. The positive electrode, the negative electrode and the separator are used for the battery sealing plateThe electrode body constituted by the electrode body is fitted and supported in the inner periphery of the opening of the battery outer case housed with the electrolyte, and the opening of the battery outer can is closed to form a closed cell.