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:
Dec. 30, 2008
Filed:
Jul. 21, 2004
Kazuo Tomimoto, Mihara-gun, JP;
Kazuki Shimozono, Sumoto, JP;
Etsuya Fujisaka, Tsuna-gun, JP;
Futoshi Nakano, Tsuna-gun, JP;
Hiroshi Hosokawa, Itano-gun, JP;
Kazuo Tomimoto, Mihara-gun, JP;
Kazuki Shimozono, Sumoto, JP;
Etsuya Fujisaka, Tsuna-gun, JP;
Futoshi Nakano, Tsuna-gun, JP;
Hiroshi Hosokawa, Itano-gun, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A battery having a bundle of electrodes and separator which is made by winding a positive-electrode plate and a negative-electrode plate together with a separator therebetween, one of the positive- and negative-electrode plates being electrically connected to a power collecting body, the power collecting body being provided in and welded to an outer package can, wherein a welding portion of the outer package can and the power collecting body comprises a first layer and a second layer which are stacked in a thickness direction of the outer package can at the welding portion, and the second layer is in contact with a surface of the first layer and includes crystal grains that are minuter than crystal grains included in the first layer.