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:
Aug. 13, 2002
Filed:
Oct. 28, 1999
Nobuaki Sugita, Sumoto, JP;
Eiji Okutani, Hyogo, JP;
Kensuke Nakatani, Sumoto, JP;
Noriyuki Miyazaki, Sumoto, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A sealed cell has: a cell outer can having a hollow body with a bottom and an opening; a spirally-wound electrode body accommodated in the above-mentioned cell outer can , including a positive electrode plate and a negative electrode plate wound with a separator ; a sealing lid having a sealing plate sealed to the above-mentioned opening of the cell outer can and an insulating member on a bottom of the above-mentioned sealing plate ; and a positive electrode current collector tab derived from a portion of an exposed core body of the positive electrode plate on an outermost periphery of the above-mentioned spirally-wound electrode body ; wherein the positive electrode current collector tab , the cell outer can and the sealing plate are welded with a tip of the above-mentioned positive electrode current collector tab being held between the above-mentioned sealing plate and an open rim of the above-mentioned cell outer can ; a spacer composing the above-mentioned insulating member has a concavity in a portion in which the above-mentioned positive electrode current collector tab is led in a direction of the opening of the above-mentioned cell outer can ; and the above-mentioned positive electrode current collector tab has a bent portion in the above-mentioned concavity . According to this construction, it is possible to provide a sealed cell which can prevent disconnection of a current collector tab inside the cell and improve reliability, even when shock such as a drop of the cell is applied to the cell.