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:
Oct. 26, 2021
Filed:
Oct. 20, 2017
Sanyo Electric Co., Ltd., Daito, JP;
Ryoichi Wakimoto, Hyogo, JP;
Hiroyuki Yamada, Hyogo, JP;
SANYO Electric Co., Ltd., Daito, JP;
Abstract
To provide a highly reliable rectangular secondary battery. A rectangular secondary battery () includes: an electrode body () that includes a positive electrode plate and a negative electrode plate; a rectangular casing () that includes an opening and that contains the electrode body (); and a sealing plate () that seals the opening of the rectangular casing (). The sealing plate () includes a gas discharge valve () that ruptures when the pressure inside the rectangular casing () has a predetermined value or more to discharge gas inside the rectangular casing () to outside the rectangular casing (). A portion of a second negative electrode current collector () is disposed, as a shielding member, at a location that is between the sealing plate () and the electrode body () and that faces the gas discharge valve ().