To prevent an application of an excessive force on an electrode sheet.
A lamination type electrode assembly 12 is accommodated in a bottomed square cylindrical case body 11 that has four corners extending from an opening 11a toward a bottom wall 11b and formed in an R part 13. A spacer 25 is interposed between an end face 12a among end faces 12a of the electrode assembly 12 and a wall face of the case body facing the end face, the end face 12a being in parallel with the lamination direction and in parallel with the direction perpendicular to the opening 11a and the bottom wall 11b. In the spacer 25, a contact surface 26 in contact with the end face 12a of the electrode assembly 12 has a width in the lamination direction larger than the thickness of the electrode assembly 12, a distance from the contact surface 26 to a place other than the R part 13 of the wall face of the case body is more than the radius of curvature R of the R part, and a part corresponding to the R part is formed in a shape not interfering with the R part.
OKUDA MOTOAKI
MINAMIGATA ATSUSHI
| JP2010161244A | 2010-07-22 | |||
| JP2007323845A | 2007-12-13 |
| WO2010113271A1 | 2010-10-07 | |||
| WO2010113273A1 | 2010-10-07 | |||
| WO2010113254A1 | 2010-10-07 | |||
| WO2010113270A1 | 2010-10-07 | |||
| WO2010113272A1 | 2010-10-07 |
Makoto Onda