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, 2010
Filed:
May. 10, 2007
Kumiko Takagi, Fukushima, JP;
Fumiko Hashimoto, Fukushima, JP;
Akira Yamaguchi, Fukushima, JP;
Yuzuru Fukushima, Miyagi, JP;
Hiroshi Inoue, Fukushima, JP;
Yasufumi Minato, Saitama, JP;
Kumiko Takagi, Fukushima, JP;
Fumiko Hashimoto, Fukushima, JP;
Akira Yamaguchi, Fukushima, JP;
Yuzuru Fukushima, Miyagi, JP;
Hiroshi Inoue, Fukushima, JP;
Yasufumi Minato, Saitama, JP;
Sony Corporation, Tokyo, JP;
Abstract
A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.