Title:
円筒形アルカリ電池
Document Type and Number:
Japanese Patent JP6986346
Kind Code:
B2
Abstract:
Provided is a resin sealing gasket 10 to be incorporated in an alkaline battery 1 housing a power generation element (3 to 5) in a cylindrical battery can 2 closed at a bottom, the sealing gasket configured to insulate a top opening of the battery can and a negative electrode terminal plate 7 from each other. The sealing gasket includes: an outer periphery part 14 standing upward from the rim of a disc-shaped partition part 13; a boss part 11 in a hollow cylindrical shape enabling a rod-shaped negative electrode current collector 6 to stand at the center of the partition part; and a thin-walled portion 15 formed in a groove shape along the outer periphery of the boss part and being thinner than other portions of the partition part. The thin-walled portion having a thickness set such that the thin-walled portion fractures when a pressure inside the battery can reach a predetermined pressure in the state where the sealing gasket is incorporated in the alkaline battery. The partition part includes a region 16 opposed to a negative electrode gel in the state where the sealing gasket is incorporated in the alkaline battery, the region 16 including a region that is in abutment with the thin-walled portion, and has a thickness of 0.3 mm or smaller and a projected area equal to or greater than 25% of a projected area of the region opposed to the negative electrode gel.
Inventors:
Tatsuya Yamazaki
Shigeyuki Kuniya
Shigeyuki Kuniya
Application Number:
JP2016245146A
Publication Date:
December 22, 2021
Filing Date:
December 19, 2016
Export Citation:
Assignee:
FDK Corporation
International Classes:
H01M6/08; H01M50/184; H01M50/186; H01M50/193; H01M50/198; H01M50/559; H01M50/586; H01M50/593
Domestic Patent References:
| JP11329383A | ||||
| JP2005079021A | ||||
| JP2009016079A | ||||
| JP2002075315A |
Foreign References:
| CN105789499A |
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation