To provide a square sealed battery with both a battery sealing property and sealing-aperture welding intensity achieved.
In the square sealed battery provided with a square exterior can having an opening with an electrode body and electrolyte housed, and a sealing body insertion-coupled with the opening, with an insertion-coupling part of the exterior can and a sealing plate laser-welded, the sealing body includes the sealing plate, a terminal plate, an insulation gasket insulating the terminal plate and the sealing plate, a terminal rivet, and an insulation plate insulating the sealing plate and the electrode body, and has a structure in which the terminal plate and the terminal rivet are fixed to the sealing plate by caulking the insulation gasket and the insulation plate. In the vicinity of a part where the insulation plate is in contact with the sealing plate, a step part is provided.
COPYRIGHT: (C)2010,JPO&INPIT
Hironori Marubayashi
Shota Yamamoto
| JP2003115287A | ||||
| JP2002304973A |