SAFETY MECHANISM FOR LAMINATE EXTERNAL PACKAGE ELECTRIC STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide the safety mechanism of a laminate external package electric storage device for giving a highly reliable laminate external package electric storage device under the use of normal condition by surely exhausting a gas from a specific part even the gas is generated from the inside of the laminate exterior body of the laminate external package electric storage device. SOLUTION: The safety mechanism of the laminate external package electric storage device has an exterior body provided with mutuary overlapped two external package films that are mutuary air tightly bonded at a joint formed at each peripheral edges, and constructed by accommodating an electric storage device element and an electrolyte in the accommodation space formed in the exterior body. An unbonded portion is formed at each peripheral edges of the two exterior films forming the exterior body with an edge passing through the accommodation space and another edge surrounded by the bonded portion. A mutuary bonded sealing part is formed at the center of the unbonded portions. An opening passing through at least one of the two exterior film is formed at the center of the sealing part. COPYRIGHT: (C)2010,JPO&INPIT