Patent ID: 8182934

Claim:
A secondary battery comprising: a power generating element; a battery case storing the power generating element and including a gas release hole; and a safety valve device configured to close the gas release hole and release gas out of the battery case through the gas release hole when inner pressure in the battery case exceeds a predetermined value, wherein the safety valve device comprises: a valve member closing the gas release hole; and a holding member holding the valve member on the battery case, the valve member includes a sealing portion separably making contact with a sealed surface located around the gas release hole of an outer surface of the battery case, and the holding member is fixed to the battery case and elastically presses the sealing portion by its elastic deformation, wherein the holding member includes: a fixing portion fixed to the outer surface of the battery case; a pressing portion elastically pressing the sealing portion of the valve member toward the sealed surface of the battery case; and an elastic deformable portion being interposed between the fixing portion and the pressing portion and elastically urging the pressing portion toward the sealed surface of the battery case by elastic deformation of the elastic deformable portion itself.