Title:
封口体及び電池
Document Type and Number:
Japanese Patent JP7093199
Kind Code:
B2
Abstract:
Provided is a nickel-hydrogen secondary battery 2 comprising a sealing body 11 that seals an opening of an outer can 10, the sealing body 11 includes a sealing plate 14, and a positive electrode cap 20 welded to the sealing plate 14, the positive electrode cap 20 includes a cylindrical body section 40, an annular flange 42 provided along a circumferential edge of an opening 45 located at a base end 41 of the body section 40, and a top wall 44 provided to close a tip 43 opposite to the base end 41, and a welded part 60 between the sealing plate 14 and the positive electrode cap 20 is located at a position where a ratio of X to R in percentage is 0% or more and 2% or less, in which R is a length from a center C of the flange 42 to an outer circumferential edge 64 of the flange, and X is a length from an edge 66 of the welded part 60 on an outer side in a radial direction of the flange to the outer circumferential edge 64 of the flange.
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Inventors:
Hiroyuki Shibaoka
Application Number:
JP2018026335A
Publication Date:
June 29, 2022
Filing Date:
February 16, 2018
Export Citation:
Assignee:
FDK Corporation
International Classes:
H01M50/152; H01M50/169; H01M50/317; H01M50/547; H01M50/566
Domestic Patent References:
| JP11354091A | ||||
| JP2001126695A | ||||
| JP2006351512A |
Foreign References:
| WO2012147782A1 |
Attorney, Agent or Firm:
Koji Nagato
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