The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2026
Filed:
Oct. 06, 2022
Prime Planet Energy & Solutions, Inc., Tokyo, JP;
Katsuji Tsujioka, Nishinomiya, JP;
Hiroshi Takabayashi, Koriyama, JP;
PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo, JP;
Abstract
Provided is a technology to suppress a decrease in airtightness around a liquid injection port of a secondary battery. A secondary battery disclosed here has a lid having a liquid injection port, a resin washer attached to the liquid injection port, and a sealing member. The sealing member has a sleeve inserted into the liquid injection port and a flange extending from the sleeve along an outer surface of the lid in an outer diameter direction. The resin washer is installed in the liquid injection port and is sandwiched between the flange and the outer surface of the lid. A protrusion protruding toward the outer surface of the lid is provided at a radial intermediate portion of the flange. A restricting portion that restricts an outer edge of the resin washer is provided in the lid or the sealing member.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile