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. 05, 2021
Filed:
Jul. 23, 2018
Sanyo Electric Co., Ltd., Osaka, JP;
Panasonic Corporation, Osaka, JP;
Yusuke Tominaga, Hyogo, JP;
Kazumichi Shimizu, Osaka, JP;
Shota Ikeda, Osaka, JP;
Kyosuke Miyata, Osaka, JP;
Atsushi Ueda, Osaka, JP;
Sadahiro Hattori, Kanagawa, JP;
Shinya Mori, Hyogo, JP;
Ryunosuke Yokoo, Hyogo, JP;
Koji Funami, Kyoto, JP;
Takaaki Kassai, Osaka, JP;
SANYO Electric Co., Ltd., Daito, JP;
PANASONIC CORPORATION, Kadoma, JP;
Abstract
A sealed cell includes a bottomed cylindrical outer casing can. The outer casing can is formed by nickel-plated iron, and a lead connected to one of a positive electrode and a negative electrode, and the outer casing can, are welded by a welding part formed from the outside surface of the outer casing can toward the lead. The welding part is formed by molten traces and has a first layer and a second layer having a higher nickel concentration than the first layer. The first layer is formed from the lead through to the inside of the outer casing can, the second layer is formed so as to adjoin the first layer on the outside surface side of the outer casing can, and the whole of the first layer is covered with the second layer when the welding part is viewed from the outside of the outer casing can.