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. 20, 2010
Filed:
May. 31, 2005
Isao Matsumoto, Osaka, JP;
Shoichi Hashimoto, Osaka, JP;
Masayuki Domen, Osaka, JP;
M&G Eco-Battery Institute Co., Ltd., Osaka, JP;
Abstract
A secondary battery can prevent microscopic short circuit due to shedding of active material from an electrode and secure electric connection between the electrode and an electrode terminal. According to an example of means for preventing shedding of active material from a positive electrodeconstituting a wound type electrode unit, a negative electrode side of a separatoris bent toward a center of the electrode unit. The negative electrodehaving a flex substrate is provided with an electrode end portionwith almost no active material. At least a part of the electrode end portionis exposed from the bent separator, and the exposed electrode end portionis electrically connected to a battery terminal or a battery casedirectly or via a negative electrode collector plate