To surely prevent the rupture of a battery when the internal pressure of the battery is increased under high temperature by arranging a sealing body fitting to the cylindrical circumferential part extending in the opening direction of a positive case in the inner wall of a positive case opening part.
A sealing body 11 made of relatively soft plastic comprises a cylindrical part 11a having a through hole 11b into which a negative current collector 2 is inserted, a thin flat part 11c connecting to the outer circumference, a cylindrical part 11d with a step arranged in the surroundings of the flat part 11c, a thick peripheral cylindrical part 11e extending downward from the cylindrical part 11d, and a thin peripheral cylindrical part 11f connecting to the cylindrical part 11e. A negative current collector 2 is inserted into the through hole 11b of the sealing body 11 by applying pressure, and the peripheral part of a negative terminal plate 3 welded to the current collector 2 is fit to the inner wall of the thick peripheral cylindrical part 11e of the sealing body 11. The sealing body 11 is fit to a positive case 7 in which the specified power generating element is housed, by applying pressure, the opening peripheral part of the case 7 is bent inward, then a battery is covered with an outer jacket label 9.
| JPH0398257 | ORGANIC ELECTROLYTE BATTERY |
| JP2016073328 | STORAGE DEVICE AND STORAGE DEVICE EXTINGUISHING METHOD |
IWAKI HIROFUMI
MATSUHISA ICHIRO
ABE MASANOBU
