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. 15, 2000
Filed:
Mar. 11, 1998
Takeo Hamamatsu, Tokushima, JP;
Masao Inoue, Tokushima, JP;
Takashi Nagase, Itano-gun, JP;
Satoru Kometani, Itano-gun, JP;
Nobuyoshi Oi, Tokushima, JP;
Hirofumi Sako, Tokushima, JP;
Hiroshi Sato, Oe-gun, JP;
Tadashi Ise, Itano-gun, JP;
Yasushi Kuroda, Tokushima, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A rectangular battery having an electrode group which is inserted in a battery case having an airtight structure. The electrode group is formed by alternately stacking positive electrodes and negative electrodes via separators. The battery case is rectangular had has a closed bottom and an open part that is airtightly sealed by a cover. The outermost electrodes, which are located on both faces of the electrode group, are coated with an active material on a surface of a core. Furthermore, the outermost electrodes have the same polarity and the cores thereof directly contact an inside surface of the outer battery case. In one embodiment, the capacity of the outermost electrodes is smaller than the capacity of the inwardly disposed electrodes of the same polarity.