US 12,034,160 B2
Non-aqueous electrolyte secondary battery
Takashi Onodera, Chiba (JP)
Assigned to SEIKO INSTRUMENTS INC., Chiba (JP)
Filed by Seiko Instruments Inc., Chiba (JP)
Filed on Sep. 16, 2021, as Appl. No. 17/477,018.
Claims priority of application No. 2020-167642 (JP), filed on Oct. 2, 2020.
Prior Publication US 2022/0109150 A1, Apr. 7, 2022
Int. Cl. H01M 4/505 (2010.01); H01M 4/02 (2006.01); H01M 4/583 (2010.01); H01M 10/052 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 4/505 (2013.01) [H01M 4/583 (2013.01); H01M 10/052 (2013.01); H01M 10/0569 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2300/004 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A non-aqueous electrolyte secondary battery, comprising:
an accommodation container comprising a positive electrode can and a negative electrode can crimped and fixed to the positive electrode can through a gasket; and
a power generation element comprising an electrolytic solution and is accommodated in the accommodation container,
wherein the positive electrode can is formed in a bottomed-cylindrical shape having a bottom wall portion and an outer wall portion formed along an outer peripheral edge of the bottom wall portion,
the negative electrode can is formed in a topped-cylindrical shape having a top wall portion and an inner wall portion which is formed along an outer peripheral edge of the top wall portion and is disposed inside the outer wall portion,
a portion of the outer wall portion located on a top wall portion side is formed as a crimping portion curved with a curvature radius R gradually toward an inner wall portion side as it extends from a bottom wall portion side toward an opening end edge of the outer wall portion,
a diameter D of the non-aqueous electrolyte secondary battery is set to 4.8 mm,
a height H2 of the positive electrode can is set to be in a range of 74% to 79% of a height H1 of the non-aqueous electrolyte secondary battery,
the height H1 is set to 2.1 mm, and
the curvature radius R of the crimping portion is set to be in a range of 0.9 mm.