US 11,990,628 B2
Secondary battery
Takahiro Sakurai, Nagoya (JP)
Assigned to PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed by Prime Planet Energy & Solutions, Inc., Tokyo (JP)
Filed on Jan. 31, 2022, as Appl. No. 17/589,599.
Claims priority of application No. 2021-016289 (JP), filed on Feb. 4, 2021.
Prior Publication US 2022/0247017 A1, Aug. 4, 2022
Int. Cl. H01M 50/107 (2021.01); H01M 10/0587 (2010.01); H01M 50/119 (2021.01)
CPC H01M 50/107 (2021.01) [H01M 10/0587 (2013.01); H01M 50/119 (2021.01)] 4 Claims
OG exemplary drawing
 
1. A secondary battery comprising a bottomed cylindrical case main body that accommodates a power generating element inside of the bottomed cylindrical case main body, wherein
the case main body comprises:
a bottomed cylindrical first member formed from one metal plate by a drawing process; and
a cylindrical second member, and
the second member is joined in a state fitting the second member to a cylindrical portion of the first member with no gaps, wherein
the power generating element comprises an electrolyte, and
the cylindrical portion of the first member directly contacts an outer circumferential part of the second member being cylindrical.