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:
Jul. 02, 2019
Filed:
Aug. 27, 2012
Hiroya Umeyama, Okazaki, JP;
Hiroaki Imanishi, Moriguchi, JP;
Hiroya Umeyama, Okazaki, JP;
Hiroaki Imanishi, Moriguchi, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken, JP;
Abstract
This invention provides a sealed secondary battery comprising a current cutoff mechanism. The current cutoff mechanism has a current breaking valvecomprising a sloped side wallA which tapers with decreasing diameter from the inner circumference of a flangeand a domeB descending in a spherical cap shape from the rim of sloped side wallA. The rotation axis L of sloped side wallA and the sloped side wallA form an angle θ to satisfy 60°≤θ≤75° while domeB has a sphere radius R of 30 mm or larger, but smaller than 100 mm. In a planer view along the rotation axis L, the outer circumference of domeB is located outside the outer circumference of a thin portion