Sealed secondary battery and manufacturing method of sealed secondary battery

• Main Authors: OKADA NAOTADA, FUKATSU KENTA
• Format: Patent
• Language: Chinese; English
• Published: 24.09.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a sealed secondary battery and a manufacturing method of the sealed secondary battery capable of easily discharging gases temporarily sealed and generated from charging and discharging. In the manufacturing method of the sealed secondary battery, an opening of a container body provided with an electrode body and electrolyte of the sealed secondary battery is blocked by a lid body formed by metal materials and provided with an opening portion; a first sealing body, which is configured to seal the opening portion of the lid body to cover the opening portion and is formed into a sheet-like shape by using a metal material, is placed on the lid body, and the first sealing body is welded to the lid body. The sealed secondary battery having the first sealing body welded thereto is charged, and the sealed secondary battery is discharged after the charge. A hole is bored in the first sealing body to form a hole portion after the discharge, a second sealing body is placed to cover the first sea